TY - RPRT A1 - Herder, Jens T1 - Specification and Implementration of a Texture Synthesis Language N2 - Texturen können als Oberflächenstrukturen realer Objekt aufgefasst werden und sind Variationen in Farbe, Geometrie, Transparenz, usw.. Im Gegensatz zu Algorithmen für die künstliche Generierung von Texturen gibt es nur wenige Ansätze zu Textur-Synthese-Sprachen oder zu Hilfsmittel für die Textur-Beschreibung. Die bekannten Werkzeuge decken zudem jeweils nur Teilgebiete der Generierung ab. Mit HiLDTe (Hierachical Language for the Description of Textures) ist nun eine Sprache entwickelt worden, mit der möglichst alle bekannten Texturtypen beschrieben werden können. HiLDTe basiert auf einem am Fachgebiet GRIS entwickelten Texturmodell, in dem Texturen generische, eventuell komplex zusammengesetzte Objekte repräsentieren. Aufgabe dieser Arbeit war es nun, Konzepte für die Sprache HiLDTe zu entwickeln, eine entsprechende Grammatik aufzubauen und mit Hilfe der UNIX-Werkzeuge LEX und YACC einen Compiler zu implementieren, mit dem ein ausführbarer Zwischen-Code für die in HiLDTe spezifizierten Texturen erstellt wird. Y1 - 1990 PB - Technische Hochschule Darmstadt CY - Darmstadt ER - TY - GEN A1 - Herder, Jens T1 - Konzeption, Implementierung und Integration einer Komponente zur inkrementellen Bezeichner- und Operatoranalyse innerhalb des PSGs N2 - Der Programmier System Generator - PSG - des Fachgebiets Praktische Informatik in Darmstadt erzeugt aus einer Sprachdefinition eine sprachspezifische Programmierumgebung. Diese besteht u. a. aus einem Editor, welcher syntaktische und semantische Fehler von Programmfragmenten, die nicht vollständig sein müssen, erkennen kann. Dem Benutzer werden per Menü Fehlerkorrekturen angeboten. Neben der freien Texteingabe besteht die Möglichkeit, den Text nur mit Hilfe von Menüs zu verfeinern. Teil dieses Editors ist die Bezeichneranalyse. Sie dient als Hilfsmittel für den Benutzer, indem für jede Stelle eines Programmfragmentes die gültigen Bezeichner ausgegeben werden können. Die Kontextanalyse setzt die Berechnung auf den von der Bezeichneranalyse erzeugten Daten auf, um semantische Fehler zu erkennen. Die bis zu dieser Arbeit verwendete Bezeichneranalyse im PSG unterstützt nur einfache Sprachkonzepte (z. B. Fortran und Pascal). Die Gültigkeitskonzepte der Bezeichner von weiterentwickelten Sprachen (z. B. Modula-2, CHILL, Ada oder Pascal-XT) sind nicht vollständig modellierbar. Wir stellen ein neues Konzept zur Definition und Berechnung der Bezeichneranalyse vor, das alle uns bekannten Sprachen mit statischer Typbindung unterstützt. Hierfür haben wir die Sprache BIS - Bezeichneridentifikationssprache - definiert. Die Methode ist verwandt mid dem Zwischencode für geordnete Attributierte Grammatiken. Für jeden Knoten des Abstrakten Syntaxbaumes wird mit Hilfe von BIS ein Code für eine abstrakte Maschine, welche die Bezeichneranalyse durchführt, geschrieben. Im Gegensatz zu herkömlichen Methoden (verkettete Symboltabellen) wird für jeden Punkt innerhalb eines Programmes for der Anfrage durch den Benutzer oder der Kontextanalyse die Menge der gültigen Bezeichner berechnet. Die Kosten für eine Anfrage sind dadurch minimal. Diese abstrakte Maschine teilt sich in zwei unabhängige Maschinen auf, zum einen in die S-Maschine, die die speziellen Operationen der Bezeichneranalyse durchführt, und zum anderen in die G-Maschine, die den Datenfluss und die Auswertung steuert. Diese Aufteilung ermöglicht den Austausch der S-Maschine durch eine andere, welche neue Anwendungsgebiete erschliesst, z. B. die eines Praeprozessors. Die G-Maschine arbeitet inkrementell; es werden nur die Codeschablonen neu ausgewertet, deren geerbten Attribute sich geändert haben. Dazu müssen die Daten, die in einer Codeschablone hinein- und hinausfliessen, abgelegt werden. Dies ergibt bei grossen Programmfragmenten eine immense Rechenzeiteinsparung auf Kosten des Speicherplatzes. Die Funktionsweise wird an einer kleinen Beispielsprache demonstriert, die zu Pascal ähnlich ist. Diese besitzt Konstrukte zum Import und Export von Daten und Datentypen zwischen Programmfragmenten. Im Prototyp kann die inkrementelle Arbeitsweise abgeschaltet werden und ermöglicht einen guten Vergleich der Verfahren. T2 - Specification, Implementation and Integration of a Module for Incremental Identifier and Operator Analysis in the PSG (Programming System Generator) KW - Februar Y1 - 1992 CY - Darmstadt ER - TY - JOUR A1 - Hesse, Jan A1 - König, Rainer A1 - Logi, Filippo A1 - Herder, Jens T1 - A Prototype of an Interface Builder for the Common Lisp Interface Manager - CLIB JF - ACM Sigplan Notices N2 - The Common Lisp Interface Manager (CLIM) is used to develop graphical user interfaces for Lisp-basedapplications. With the prototype of the CLIM interface Builder (CLIB) the programmer can generate code for CLIM interactively. The developing process will be fast and less prone to errors. With this new tool, the interactive rapid prototyping reduces costs of a specification phase. Here we present the concept and first results of the prototype of CLIB. Y1 - 1993 U6 - https://doi.org/10.1145/163114.163116 VL - 28 IS - 8 SP - 19 EP - 28 PB - Forschungszentrum Informatik (FZI), Technical Expert Systems and Robotics ER - TY - JOUR A1 - Kunii, Tosiyasu L. A1 - Herder, Jens A1 - Myszkowski, Karol A1 - Okunev, Oleg A1 - Okuneva, Galina A1 - Ibusuki, Masumi T1 - Articulation Simulation for an Intelligent Dental Care System JF - Displays N2 - CAD/CAM techniques are used increasingly in dentistry for design and fabrication of teeth restorations. An important issue is preserving occlusal contacts of teeth after restoration. Traditional techniques based on the use of casts with mechanical articulators require manual adjustment of occlusal surface, which becomes impractical when hard restoration materials like porcelain are used; they are also time and labor consuming. Most existing computer systems ignore completely such an articulation check, or perform the check at the level of a tooth and its immediate neighbors. We present a new mathematical model and a related user interface for global articulation simulation, developed for the Intelligent Dental Care System project. The aim of the simulation is elimination of the use of mechanical articulators and manual adjustment in the process of designing dental restorations and articulation diagnostic. The mathematical model is based upon differential topological modeling of the jawbs considered as a mechanical system. The user interface exploits metaphors that are familiar to dentists from everyday practice. A new input device designed specifically for use with articulation simulation is proposed. Y1 - 1994 VL - 15 IS - 3 SP - 181 EP - 188 ER - TY - CHAP A1 - Myszkowski, Karol A1 - Okuneva, Galina A1 - Herder, Jens A1 - Kunii, Tosiyasu L. A1 - Ibusuki, Masumi T1 - Visual Simulation of the Chewing Process for Dentistry T2 - Visualization & Modelling, International Conf., 5-7 December, 1995 N2 - CAD/CAM techniques are increasingly used in dentistry for the design and fabrication of teeth restorations. Important concerns are the correction of articulation problems that existed beforetreatment and the prevention of treatment-generated problems. These require interactive evaluation of the occlusal surfaces of teeth during mastication. Traditional techniques based on the use of casts with mechanical articulators require manual adjustment of occlusal surfaces, which becomes impractical when hard restoration materials like porcelain are used; they are also time and labor consuming and provide little visual information. We present new visual tools and a related user interface for global articulation simulation, developed for the Intelligent Dental Care System project. The aim of the simulation is visual representation of characteristics relevant to the chewing process. The simulation is based on the construction of distance maps, which are visual representations of the distributions of the distances of points in a tooth to the opposite jaw. We use rasterizing graphics hardware for fast calculation of the distance maps. Distance maps are used for collision detection and for the derivation of various characteristics showing the distribution of load on the teeth and the chewing capability of the teeth. Such characteristics can be calculated for particular positions of the jaws; cumulative characteristics are used to describe the properties of jaw movement. This information may be used for interactive design of the occlusal surfaces of restorations and for jaw articulation diagnosis. We also demonstrate elements of a user interface that exploit metaphors familiar to dentists from everyday practice. Y1 - 1995 CY - Leeds ER - TY - RPRT A1 - Christianson, Kiel A1 - Herder, Jens T1 - Mini-lectures in Computer Science on the WWW N2 - The task of the Center for Language Research is to provide content-based English language instruction for students of computer science and engineering. As such, we find ourselves at the confluence of many of the streams currently running through the English Language Teaching profession, including English for Science and Technology (EST), English for Academic Purposes (EAP), English for Specific Purposes (ESP), Computer-assisted language learning (CALL), content-based instruction, and multimedia applications in foreign language pedagogy. This paper describes our initial attempts to construct a number of World Wide Web pages where students will be able to study EST, EAP, and computer science topics on their own in a multimedia environment. KW - English as a foreign language KW - teaching KW - web and video supported learning KW - Lehre Y1 - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-854 CY - Aizu ER - TY - CHAP A1 - Herder, Jens A1 - Cohen, Michael T1 - Design of a Helical Keyboard T2 - icad'96 - International Conference on Auditory Display, Palo Alto N2 - Inspired by the cyclical nature of octaves and helical structure of a scale (Shepard, '82 and '83), we prepared a model of a piano-style keyboard (prototyped in Mathematica), which was then geometrically warped into a left-handed helical configuration, one octave/revolution, pitch mapped to height. The natural orientation of upper frequency keys higher on the helix suggests a parsimonious left-handed chirality, so that ascending notes cross in front of a typical listener left to right. Our model is being imported (via the dxf file format) into (Open Inventor/)VRML, where it can be driven by MIDI events, realtime or sequenced, which stream is both synthesized (by a Roland Sound Module), and spatialized by a heterogeneous spatial sound backend (including the Crystal River Engineering Acoustetron II and the Pioneer Sound Field Control speaker-array System), so that the sound of the respective notes is directionalized with respect to sinks, avatars of the human user, by default in the tube of the helix. This is a work-in-progress which we hope to be fully functional within the next few months. Y1 - 1996 CY - Palo Alto ER - TY - CHAP A1 - Amano, Katsumi A1 - Matsushita, Fumio A1 - Yanagawa, Hirofumi A1 - Cohen, Michael A1 - Herder, Jens A1 - Koba, Yoshiharu A1 - Tohyama, Mikio T1 - The Pioneer sound field control system at the University of Aizu Multimedia Center T2 - RO-MAN '96 Tsukuba N2 - The PSFC, or Pioneer sound field control system, is a DSP-driven hemispherical 14-loudspeaker array, installed at the University of Aizu Multimedia Center. Collocated with a large screen rear-projection stereographic display the PSFC features realtime control of virtual room characteristics and direction of two separate sound channels, smoothly steering them around a configurable soundscape. The PSFC controls an entire sound field, including sound direction, virtual distance, and simulated environment (reverb level, room size and liveness) for each source. It can also configure a dry (DSP-less) switching matrix for direct directionalization. The PSFC speaker dome is about 14 m in diameter, allowing about twenty users at once to comfortably stand or sit near its sweet spot. KW - Acoustic reflection KW - Auditory displays KW - Control systems KW - Delay effects KW - Electronic mail KW - Large screen displays KW - Loudspeakers KW - Multimedia systems KW - Reverberation KW - Size control Y1 - 1996 SN - 0-7803-3253-9 U6 - https://doi.org/10.1109/ROMAN.1996.568887 SP - 495 EP - 499 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Myszkowski, Karol A1 - Herder, Jens A1 - Kunii, Tosiyasu L. A1 - Ibusuki, Masumi T1 - Visualization and analysis of occlusion for human jaws using a "functionally generated path" T2 - IS&T/SPIE Symp. on Electronic Imaging, Visual Data Exploration and Analysis III N2 - Dynamic characteristics of occlusion during lower jaw motion are useful in the diagnosis of jaw articulation problems and in computer-aided design/manufacture of teeth restorations. The Functionally Generated Path (FGP), produced as a surface which envelops the actual occlusal surface of the moving opponent jaw, can be used for compact representation of dynamic occlusal relations. In traditional dentistry FGP is recorded as a bite impression in a patient’s mouth. We propose an efficient computerized technique for FGP reconstruction and validate it through implementation and testing. The distance maps between occlusal surfaces of jaws, calculated for multiple projection directions and accumulated for mandibular motion, provide information for FGP computation. Rasterizing graphics hardware is used for fast calculation of the distance maps. Real-world data are used: the scanned shape of teeth and the measured motion of the lower jaw. We show applications of FGP to analysis of the occlusion relations and occlusal surface design for restorations. Y1 - 1996 U6 - https://doi.org/10.1117/12.234684 SP - 360 EP - 367 PB - The International Society for Optical Engineering CY - San Jose ER - TY - CHAP A1 - Herder, Jens A1 - Myszkowski, Karol A1 - Kunii, Tosiyasu L. A1 - Ibusuki, Masumi ED - Weghorst, Suzanne J. ED - Sieburg, Hans B. ED - Morgan, Karen S. T1 - A Virtual Reality Interface to an Intelligent Dental Care System T2 - Medicine Meets Virtual Reality 4 Y1 - 1996 SP - 17 EP - 20 PB - IOS Press CY - Amsterdam ER - TY - CHAP A1 - Herder, Jens T1 - Cooperative Tools for Teaching : an Impact of a Network Environment T2 - Annual Report of the Information Systems and Technology Center, University of Aizu, October 1997 N2 - Education at the University of Aizu is focussed upon computer science. Besides being the subject matter of many courses, however, the computer also plays a vital role in the educational process itself, both in the distribution of instructional media, and in providing students with valuable practical experience. All students have unlimited access (24-hours-a-day) to individual networked workstations, most of which are multimedia-capable (even video capture is possible in two exercise rooms). Without software and content tailored for computer-aided instruction, the hardware becomes an expensive decoration. In any case, there is a need to better educate the instructors and students in the use of the equipment. In the interest of facilitating effective, collaborative use of network-based computers in teaching, this article explores the impact that a network environment can have on such activities. First, as a general overview, and to examine the motivation for the use of a network environment in teaching, this article reviews a range of different styles of collaboration. Then the article shows what kind of tools are available for use, within the context of what has come to be called Computer-Supported Cooperative Work (CSCW). KW - CAI KW - CAT KW - computer education KW - collaborative work KW - CSCW KW - groupware KW - FHD Y1 - 1997 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-827 SP - 3 EP - 8 CY - Aizu ER - TY - CHAP A1 - Herder, Jens T1 - Tools and widgets for spatial sound authoring T2 - CompuGraphics ' 97, Sixth International Conference on Computational Graphics and Visualization Techniques: Graphics in the Internet Age, Vilamoura, Portugal N2 - Broader use of virtual reality environments and sophisticated animations spawn a need for spatial sound. Until now, spatial sound design has been based very much on experience and trial and error. Most effects are hand-crafted, because good design tools for spatial sound do not exist. This paper discusses spatial sound authoring and its applications, including shared virtual reality environments based on VRML. New utilities introduced by this research are an inspector for sound sources, an interactive resource manager, and a visual soundscape manipulator. The tools are part of a sound spatialization framework and allow a designer/author of multimedia content to monitor and debug sound events. Resource constraints like limited sound spatialization channels can also be simulated. KW - spatial sound KW - virtual reality environments KW - multimedia KW - spatialization KW - spatial media KW - vizualization KW - user interface design KW - man-machine interfaces Y1 - 1997 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-896 UR - http://vsvr.medien.hs-duesseldorf.de/publications/cg97-tawfssa/welcome.html SN - 972-8342-02-0 N1 - Zugriff auf die Konferenzveröffentlichung über den angegebene URL conference paper available via URL SP - 87 EP - 95 CY - Portugal ER - TY - CHAP A1 - Herder, Jens A1 - Cohen, Michael ED - Gorayska, Barbara ED - Nehaniv, Chrystopher L. ED - Marsh, Jonathon P. T1 - Enhancing Perspicuity of Objects in Virtual Reality Environments T2 - Proceedings, Second International Conference on Cognitive Technology N2 - In an information-rich Virtual Reality (VR) environment, the user is immersed in a world containing many objects providing that information. Given the finite computational resources of any computer system, optimization is required to ensure that the most important information is presented to the user as clearly as possible and in a timely fashion. In particular, what is desired are means whereby the perspicuity of an object may be enhanced when appropriate. An object becomes more perspicuous when the information it provides to the user becomes more readily apparent. Additionally, if a particular object provides high-priority information, it would be advantageous to make that object obtrusive as well as highly perspicuous. An object becomes more obtrusive if it draws attention to itself (or equivalently, if it is hard to ignore). This paper describes a technique whereby objects may dynamically adapt their representation in a user's environment according to a dynamic priority evaluation of the information each object provides. The three components of our approach are: - an information manager that evaluates object information priority, - an enhancement manager that tabulates rendering features associated with increasing object perspicuity and obtrusion as a function of priority, and - a resource manager that assigns available object rendering resources according to features indicated by the enhancement manager for the priority set for each object by the information manager. We consider resources like visual space (pixels), sound spatialization channels (mixels), MIDI/audio channels, and processing power, and discuss our approach applied to different applications. Assigned object rendering features are implemented locally at the object level (e.g., object facing the user using the billboard node in VRML 2.0) or globally, using helper applications (e.g., active spotlights, semi-automatic cameras). KW - autonomous actors KW - obtrusion KW - perspicuity KW - spatial media KW - spatialization KW - user interface design man-machine interfaces KW - Virtual Reality Y1 - 1997 SN - 0-8186-8084-9 SP - 228 EP - 237 PB - IEEE CY - Los Alamitos ER - TY - CHAP A1 - Schmitt, Lothar M. A1 - Herder, Jens A1 - Bhalla, Subhash ED - Gorayska, Barbara ED - Nehaniv, Chrystopher L. ED - Marsh, Jonathon P. T1 - Information Retrieval and Database Architecture for Conventional Japanese Character Dictionaries T2 - Proceedings, Second International Conference on Cognitive Technology N2 - The cycle of abstraction-reconstruction which occurs as a fundamental principle in the development of culture and in cognitive processes is described and analyzed. This approach leads to recognition of boundary conditions for and directions of probable development of cognitive tools. It is shown how the transition from a conventional Japanese-English character dictionary to a multi-dimensional language database is an instance of such an abstraction-reconstruction cycle. The different phases of the design of a multi-dimensional language database based upon different computer software technologies are properly placed in this cycle. The methods used include the use of UNIX software tools, classical database methods as-well-as the use of search engines based upon full text search in this process. Several directions of application and extension for a multi-dimensional language database are discussed from the general point of view of an abstraction-reconstruction cycle. KW - abstraction-reconstruction cycle KW - database KW - dictionary KW - hypertext, search engine KW - retrieval methods KW - UNIX Y1 - 1997 SN - 0-8186-8084-9 SP - 200 EP - 217 PB - IEEE CY - Los Alamitos ER - TY - CHAP A1 - Herder, Jens A1 - Cohen, Michael T1 - Sound Spatialization Resource Management in Virtual Reality Environments T2 - ASVA’97 ‐- Int. Symp. on Simulation, Visualization and Auralization for Acoustic Research and Education N2 - In a virtual reality environment users are immersed in a scene with objects which might produce sound. The responsibility of a VR environment is to present these objects, but a system has only limited resources, including spatialization channels (mixels), MIDI/audio channels, and processing power. The sound spatialization resource manager controls sound resources and optimizes fidelity (presence) under given conditions. For that a priority scheme based on human psychophysical hearing is needed. Parameters for spatialization priorities include intensity calculated from volume and distance, orientation in the case of non-uniform radiation patterns, occluding objects, frequency spectrum (low frequencies are harder to localize), expected activity, and others. Objects which are spatially close together (depending on distance and direction) can be mixed. Sources that can not be spatialized can be treated as a single ambient sound source. Important for resource management is the resource assignment, i.e., minimizing swap operations, which makes it desirable to look-ahead and predict upcoming events in a scene. Prediction is achieved by monitoring objects’ speed and past evaluation values. Fidelity is contrasted for Zifferent kind of resource restrictions and optimal resource assignment based upon unlimited dynamic scene look-ahead. To give standard and comparable results, the VRML 2.0 specification is used as an application programmer interface. Applicability is demonstrated with a helical keyboard, a polyphonic MIDI stream driven animation including user interaction (user moves around, playing together with programmed notes). The developed sound spatialization resource manager gives improved spatialization fidelity under runtime constraints. Application programmers and virtual reality scene designers are freed from the burden of assigning and predicting the sound sources. Y1 - 1997 SP - 407 EP - 414 CY - Tokyo ER - TY - CHAP A1 - Myszkowski, Karol A1 - Okuneva, Galina A1 - Herder, Jens A1 - Kunii, Tosiyasu L. A1 - Ibusuki, Masumi ED - Earnshaw, Rae A. ED - Huw, Jones ED - John, Vince T1 - Visual Simulation of the Chewing Process for Dentistry T2 - Visualization & Modeling N2 - CAD/CAM techniques are increasingly used in dentistry for the design and fabrication of teeth estorations. Important concerns are the correction of articulation problems that existed before treatment and the prevention of treatment-generated problems. These require interactive evaluation of the occlusal surfaces of teeth during mastication. Traditional techniques based on the use of casts with mechanical articulators require manual adjustment of occlusal surfaces, which becomes impractical when hard restoration materials like porcelain are used; they are also time and labor consuming and provide little visual information. We present new visual tools and a related user interface for global articulation simulation, developed for the Intelligent Dental Care System project. The aim of the simulation is visual representation of characteristics relevant to the chewing process. The simulation is based on the construction of distance maps, which are visual representations of the distributions of the distances of points in a tooth to the opposite jaw. We use rasterizing graphics hardware for fast calculation of the distance maps. Distance maps are used for collision detection and for the derivation of various characteristics showing the distribution of load on the teeth and the chewing capability of the teeth. Such characteristics can be calculated for particular positions of the jaws; cumulative characteristics are used to describe the properties of jaw movement. This information may be used for interactive design of the occlusal surfaces of restorations and for jaw articulation diagnosis. We also demonstrate elements of a user interface that exploit metaphors familiar to dentists from everyday practice. Y1 - 1997 SN - 0-12-227738-4 SP - 419 EP - 438 PB - Academic Press CY - London ER - TY - CHAP A1 - Herder, Jens T1 - Sound Spatialization Framework: An Audio Toolkit for Virtual Environments T2 - First International Conference on Human and Computer, Aizu-Wakamatsu, September 1998 N2 - The Sound Spatialization Framework is a C++ toolkit and development environment for providing advanced sound spatialization for virtual reality and multimedia applications. The Sound Spatialization Framework provides many powerful display and user-interface features not found in other sound spatialization software packages. It provides facilities that go beyond simple sound source spatialization: visualization and editing of the soundscape, multiple sinks, clustering of sound sources, monitoring and controlling resource management, support for various spatialization backends, and classes for MIDI animation and handling. KW - sound spatialization KW - resource management KW - virtual environments KW - spatial sound authoring KW - user interface design KW - human-machine interfaces Y1 - 1998 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-788 CY - Aizu ER - TY - JOUR A1 - Herder, Jens T1 - Sound Spatialization Framework: An Audio Toolkit for Virtual Environments JF - Journal of the 3D-Forum Society N2 - The Sound Spatialization Framework is a C++ toolkit and development environment for providing advanced sound spatialization for virtual reality and multimedia applications. The Sound Spatialization Framework provides many powerful display and user-interface features not found in other sound spatialization software packages. It provides facilities that go beyond simple sound source spatialization: visualization and editing of the soundscape, multiple sinks, clustering of sound sources, monitoring and controlling resource management, support for various spatialization backends, and classes for MIDI animation and handling. Keywords: sound spatialization, resource management, virtual environments, spatial sound authoring, user interface design, human-machine interfaces KW - sound spatialization KW - resource management KW - virtual environments KW - spatial sound authoring KW - user interface design KW - human-machine interfaces Y1 - 1998 VL - 12 IS - 3 SP - 17 EP - 22 ER - TY - JOUR A1 - Amano, Katsumi A1 - Matsushita, Fumio A1 - Yanagawa, Hirofumi A1 - Cohen, Michael A1 - Herder, Jens A1 - Martens, William A1 - Koba, Yoshiharu A1 - Tohyama, Mikio T1 - A Virtual Reality Sound System Using Room-Related Transfer Functions Delivered Through a Multispeaker Array: the PSFC at the University of Aizu Multimedia Center JF - TVRSJ N2 - The PSFC, or Pioneer Sound Field Controller, is a DSP-driven hemispherical loudspeaker array, installed at the University of Aizu Multimedia Center. The PSFC features realtime manipulation of the primary components of sound spatialization for each of two audio sources located in a virtual environment, including the content (apparent direction and distance) and context (room characteristics: reverberation level, room size and liveness). In an alternate mode, it can also direct the destination of the two separate input signals across 14 loudspeakers, manipulating the direction of the virtual sound sources with no control over apparent distance other than that afforded by source loudness (including no simulated environmental reflections or reverberation). The PSFC speaker dome is about 10 m in diameter, accommodating about fifty simultaneous users, including about twenty users comfortably standing or sitting near its ``sweet spot,'' the area in which the illusions of sound spatialization are most vivid. Collocated with a large screen rear-projection stereographic display, the PSFC is intended for advanced multimedia and virtual reality applications. KW - audio signal processing, audio telecommunications KW - auralization KW - calm technology KW - directional mixing console KW - multichannel sound reproduction KW - room-related transfer functions KW - roomware KW - sound localization KW - virtual conferencing environment Y1 - 1998 U6 - https://doi.org/10.18974/tvrsj.3.1_1 VL - 3 IS - 1 SP - 1 EP - 12 PB - J-STAGE ER - TY - CHAP A1 - Ishikawa, Kimitaka A1 - Hirose, Minefumi A1 - Herder, Jens T1 - A Sound Spatialization Server for a Speaker Array as an Integrated Part of a Virtual Environment T2 - IEEE YUFORIC Germany 98 N2 - Spatial sound plays an important role in virtual reality environments, allowing orientation in space, giving a feeling of space, focusing the user on events in the scene, and substituting missing feedback cues (e.g., force feedback). The sound spatialization framework of the University of Aizu, which supports number of spatialization backends, has been extended to include a sound spatialization server for a multichannel loudspeaker array (Pioneer Sound Field Control System). Our goal is that the spatialization server allows easy integration into virtual environments. Modeling of distance cues, which are essential for full immersion, is discussed. Furthermore, the integration of this prototype into different applications allowed us to reveal the advantages and problems of spatial sound for virtual reality environments. KW - distance cue KW - loudspeaker array KW - psychoacoustic KW - sound spatialization server Y1 - 1998 UR - http://vsvr.medien.hs-duesseldorf.de/publications/ve98-spatial-server/welcome.html PB - IEEE CY - Stuttgart ER - TY - CHAP A1 - Cohen, Michael A1 - Herder, Jens ED - Göbel, Martin ED - Landauer, Jürgen ED - Lang, Ulrich ED - Wapler, Matthias T1 - Symbolic representations of exclude and include for audio sources and sinks: Figurative suggestions of mute/solo & cue and deafen/confide & harken T2 - Virtual Environments ’98, Proceedings of the Eurographics Workshop Y1 - 1998 SN - 3-211-83233-5 U6 - https://doi.org/10.1007/978-3-7091-7519-4_23 SP - 235 EP - 242 PB - Springer-Verlag CY - Stuttgart ER - TY - JOUR A1 - Herder, Jens T1 - Tools and Widgets for Spatial Sound Authoring JF - Computer Networks & ISDN Systems Y1 - 1998 VL - 30 IS - 20-21 SP - 1933 EP - 1940 PB - Elsevier ER - TY - JOUR A1 - Martens, William L. A1 - Herder, Jens A1 - Shiba, Yoshiki T1 - A filtering model for efficient rendering of the spatial image of an occluded virtual sound source JF - The Journal of the Acoustical Society of America N2 - Rendering realistic spatial sound imagery for complex virtual environments must take into account the effects of obstructions such as reflectors and occluders. It is relatively well understood how to calculate the acoustical consequence that would be observed at a given observation point when an acoustically opaque object occludes a sound source. But the interference patterns generated by occluders of various geometries and orientations relative to the virtual source and receiver are computationally intense if accurate results are required. In many applications, however, it is sufficient to create a spatial image that is recognizable by the human listener as the sound of an occluded source. In the interest of improving audio rendering efficiency, a simplified filtering model was developed and its audio output submitted to psychophysical evaluation. Two perceptually salient components of occluder acoustics were identified that could be directly related to the geometry and orientation of a simple occluder. Actual occluder impulse responses measured in an anechoic chamber resembled the responses of a model incorporating only a variable duration delay line and a low-pass filter with variable cutoff frequency. KW - virtual environment Y1 - 1999 U6 - https://doi.org/10.1121/1.425354 VL - 105 IS - 2 SP - 980 ER - TY - JOUR A1 - Martens, William L. A1 - Herder, Jens T1 - Perceptual criteria for eliminating reflectors and occluders for efficient rendering of environmental sound JF - The Journal of the Acoustical Society of America Y1 - 1999 U6 - https://doi.org/10.1121/1.425349 VL - 105 IS - 2 SP - 979 ER - TY - THES A1 - Herder, Jens T1 - A Sound Spatialization Resource Management Framework N2 - In a virtual reality environment, users are immersed in a scene with objects which might produce sound. The responsibility of a VR environment is to present these objects, but a practical system has only limited resources, including spatialization channels (mixels), MIDI/audio channels, and processing power. A sound spatialization resource manager, introduced in this thesis, controls sound resources and optimizes fidelity (presence) under given conditions, using a priority scheme based on psychoacoustics. Objects which are spatially close together can be coalesced by a novel clustering algorithm, which considers listener localization errors. Application programmers and VR scene designers are freed from the burden of assigning mixels and predicting sound source locations. The framework includes an abstract interface for sound spatialization backends, an API for the VR environments, and multimedia authoring tools. KW - audio rendering KW - human perception KW - Resource Management KW - Sound Spatialization Y1 - 1999 UR - http://vsvr.medien.hs-duesseldorf.de/publications/phd99-abstract.html PB - University of Tsukuba CY - Tsukuba ER - TY - CHAP A1 - Herder, Jens T1 - Optimization of Sound Spatialization Resource Management through Clustering T2 - Second International Conference on Human and Computer N2 - Level-of-detail is a concept well-known in computer graphics to reduce the number of rendered polygons. Depending on the distance to the subject (viewer), the objects’ representation is changed. A similar concept is the clustering of sound sources for sound spatialization. Clusters can be used to hierarchically organize mixels and to optimize the use of resources, by grouping multiple sources together into a single representative ource. Such a clustering process should minimize the error of position allocation of elements, perceived as angle and distance, and also differences between velocity relative to the sink (i.e., Doppler shift). Objects with similar direction of motion and speed (relative to sink) in the same acoustic resolution cone and with similar distance to a sink can be grouped together. KW - audio rendering KW - clustering, and human perception KW - Resource Management KW - Sound Spatialization Y1 - 1999 SP - 1 EP - 7 CY - Aizu-Wakamatsu ER - TY - JOUR A1 - Jens Herder, T1 - Optimization of Sound Spatialization Resource Management through Clustering JF - Journal of the 3D-Forum Society N2 - Level-of-detail is a concept well-known in computer graphics to reduce the number of rendered polygons. Depending on the distance to the subject (viewer), the objects’ representation is changed. A similar concept is the clustering of sound sources for sound spatialization. Clusters can be used to hierarchically organize mixelsand to optimize the use of resources, by grouping multiple sources together into a single representative source. Such a clustering process should minimize the error of position allocation of elements, perceived as angle and distance, and also differences between velocity relative to the sink (i.e., Doppler shift). Objects with similar direction of motion and speed (relative to sink) in the same acoustic resolution cone and with similar distance to a sink can be grouped together. KW - audio rendering KW - clustering, and human perception KW - Resource Management KW - Sound Spatialization KW - VSVR Y1 - 1999 VL - 13 IS - 3 SP - 59 EP - 65 ER - TY - JOUR A1 - Herder, Jens T1 - Visualization of a Clustering Algorithm of Sound Sources based on Localization Errors JF - Journal of the 3D-Forum Society N2 - A module for soundscape monitoring and visualizing resource management processes was extended for presenting clusters, generated by a novel sound source clustering algorithm. This algorithm groups multiple sound sources together into a single representative source, considering localization errors depending on listener orientation. Localization errors are visualized for each cluster using resolution cones. Visualization is done in runtime and allows understanding and evaluation of the clustering algorithm. KW - audio rendering, clustering KW - human perception KW - Resource Management KW - Sound Spatialization KW - Visualization Y1 - 1999 VL - 13 IS - 3 SP - 66 EP - 70 ER - TY - CHAP A1 - Herder, Jens T1 - Visualization of a Clustering Algorithm of Sound Sources based on Localization Errors T2 - Second International Conference on Human and Computer N2 - A module for soundscape monitoring and visualizing resource management processes was extended for presenting clusters, generated by a novel sound source clustering algorithm. This algorithm groups multiple sound sources together into a single representative source, considering localization errors depending on listener orientation. Localization errors are visualized for each cluster using resolution cones. Visualization is done in runtime and allows understanding and evaluation of the clustering algorithm. KW - audio rendering, clustering KW - human perception KW - Resource Management KW - Sound Spatialization KW - Visualization Y1 - 1999 SP - 1 EP - 5 CY - Aizu-Wakamatsu ER - TY - CHAP A1 - Martens, William L. A1 - Herder, Jens A1 - Shiba, Yoshiki T1 - A filtering model for efficient rendering of the spatial image of an occluded virtual sound source T2 - 137th Regular Meeting of the Acoustical Society of America and the 2nd Convention of the European Acoustics Association N2 - Rendering realistic spatial sound imagery for complex virtual environments must take into account the effects of obstructions such as reflectors and occluders. It is relatively well understood how to calculate the acoustical consequence that would be observed at a given observation point when an acoustically opaque object occludes a sound source. But the interference patterns generated by occluders of various geometries and orientations relative to the virtual source and receiver are computationally intense if accurate results are required. In many applications, however, it is sufficient to create a spatial image that is recognizable by the human listener as the sound of an occluded source. In the interest of improving audio rendering efficiency, a simplified filtering model was developed and its audio output submitted to psychophysical evaluation. Two perceptually salient components of occluder acoustics were identified that could be directly related to the geometry and orientation of a simple occluder. Actual occluder impulse responses measured in an anechoic chamber resembled the responses of a model incorporating only a variable duration delay line and a low-pass filter with variable cutoff frequenc KW - audio rendering KW - first-order reflection KW - human perception KW - occluder Y1 - 1999 PB - Acoustical Society of America, European Acoustics Association CY - Berlin ER - TY - CHAP A1 - Martens, William L. A1 - Herder, Jens T1 - Perceptual criteria for eliminating reflectors and occluders from the rendering of environmental sound T2 - 137th Regular Meeting of the Acoustical Society of America and the 2nd Convention of the European Acoustics Association N2 - Given limited computational resources available for the rendering of spatial sound imagery, we seek to determine effective means for choosing whatcomponents of the rendering will provide the most audible differences in the results. Rather than begin with an analytic approach that attempts to predict audible differences on the basis of objective parameters, we chose to begin with subjective tests of how audibly different the rendering result may be heard to be when that result includes two types of sound obstruction: reflectors and occluders. Single-channel recordings of 90 short speech sounds were made in an anechoic chamber in the presence and absence of these two types of obstructions, and as the angle of those obstructions varied over a 90 degree range. These recordings were reproduced over a single loudspeaker in that anechoic chamber, and listeners were asked to rate how confident they were that the recording of each of these 90 stimuli included an obstruction. These confidence ratings can be used as an integral component in the evaluation function used to determine which reflectors and occluders are most important for rendering. KW - audio rendering KW - first-order reflection KW - human perception KW - level of detail KW - occluder KW - sound spatialization resource management Y1 - 1999 PB - Acoustical Society of America, European Acoustics Association CY - Berlin ER - TY - JOUR A1 - Cohen, Michael A1 - Herder, Jens A1 - L. Martens, William T1 - Cyberspatial Audio Technology T1 - available in Japanese as well - Acoustical Society of Japan, Vol. 55, No. 10, pp. 730-731 JF - The Journal of the Acoustical Society of Japan (E) N2 - Cyberspatial audio applications are distinguished from the broad range of spatial audio applications in a number of important ways that help to focus this review. Most significant is that cyberspatial audio is most often designed to be responsive to user inputs. In contrast to non-interactive auditory displays, cyberspatial auditory displays typically allow active exploration of the virtual environment in which users find themselves. Thus, at least some portion of the audio presented in a cyberspatial environment must be selected, processed, or otherwise rendered with minimum delay relative to user input. Besides the technological demands associated with realtime delivery of spatialized sound, the type and quality of auditory experiences supported are also very different from those associated with displays that support stationary sound localization. Y1 - 1999 U6 - https://doi.org/10.1250/ast.20.389 N1 - available in Japanese as well - Acoustical Society of Japan, Vol. 55, No. 10, pp. 730-731 VL - 20 IS - 6 SP - 389 EP - 395 ER - TY - JOUR A1 - Honno, Kuniaki A1 - Suzuki, Kenji A1 - Herder, Jens T1 - Distance and Room Effects Control for the PSFC, an Auditory Display using a Loudspeaker Array JF - Journal of the 3D-Forum Society N2 - The Pioneer Sound Field Controller (PSFC), a loudspeaker array system, features realtime configuration of an entire sound field, including sound source direction, virtual distance, and context of simulated environment (room characteristics: room size and liveness) for each of two sound sources. In the PSFC system, there is no native parameter to specify the distance between the sound source and sound sink (listener) and also no function to control it directrly. This paper suggests the method to control virtual distance using basic parameters: volume, room size and liveness. The implementation of distance cue is an important aspect of 3D sounds. Virtual environments supporting room effects like reverberation not only gain realism but also provide additional information to users about surrounding space. The context switch of different aural attributes is done by using an API of the Sound Spatialization Framework. Therefore, when the sound sink move through two rooms, like a small bathroom and a large living room, the context of the sink switches and different sound is obtained. KW - VSVR Y1 - 2000 VL - 14 IS - 4 SP - 146 EP - 151 ER - TY - CHAP A1 - Suzuki, Kenji A1 - Nishoji, Yuji A1 - Herder, Jens T1 - Implementation of Aural Attributes for Simulation of Room Effects in Virtual Environments T2 - ACM Multimedia 2000 N2 - The audio design for virtual environments includes simulation of acoustical room properties besides specifing sound sources and sinks and their behavior. Virtual environments supporting room reverberation not only gain realism but also provide additional information to the user about surrounding space. Catching the different sound properties by the different spaces requires partitioning the space by the properties of aural spaces. We define soundscape and aural attributes as an application and multimedia content interface. Calculated data on an abstract level is sent to spatialization backends. Part of this research was the implementation of a device driver for the Roland Sound Space Processor. This device not only directionalizes sound sources, but also controls room effects like reverberation. KW - Acoustic displays KW - Aural attributes KW - Room effects KW - Virtual environments KW - VSVR Y1 - 2000 SP - 439 EP - 441 PB - ACM CY - Los Angeles ER - TY - CHAP A1 - Herder, Jens T1 - Challenges of Virtual Sets: From Broadcasting to Interactive Media T2 - Seventh International Workshop on Human N2 - Virtual sets have evolved from computer-generated, prerendered 2D backgrounds to realtime, responsive 3D computer graphics and are nowadays standard repertoire of broadcasting divisions. The graphics, which are combined with real video feed becoming moresophisticated, real looking and more responsive. We will look at the recent developments and suggest further developments like integration of spatial audio into the studio production and generating interactive media streams. Educational institutes recognize the demands of the rising media industry and established new courses on media technology like the Duesseldorf University of Applied Sciences. KW - Education KW - Interactive Media KW - Sound Spatialization KW - Virtual Sets KW - Virtual (TV) Studio KW - VSVR Y1 - 2000 SP - 13 EP - 17 PB - University of Aizu CY - Aizu-Wakamatsu ER - TY - JOUR A1 - Herder, Jens A1 - Yamazaki, Yasuhiro T1 - A Chatspace Deploying Spatial Audio for Enhanced Conferencing JF - Journal of the 3D-Forum Society KW - VSVR Y1 - 2000 VL - 15 IS - 1 ER - TY - CHAP A1 - Honno, Kuniaki A1 - Suzuki, Kenji A1 - Herder, Jens T1 - Distance and Room Effects Control for the PSFC, an Auditory Display using a Loudspeaker Array T2 - Third International Conference on Human and Computer N2 - The Pioneer Sound Field Controller (PSFC), a loudspeaker array system, features realtime configuration of an entire sound field,including sound source direction, virtual distance, and context of simulated environment (room characteristics: room size and liveness)for each of two sound sources. In the PSFC system, there is no native parameter to specify the distance between the sound source and sound sink (listener) and also no function to control it directrly. This paper suggests the method to control virtual distance using basic parameters: volume, room size and liveness. The implementation of distance cue is an important aspect of 3D sounds. Virtual environments supporting room effects like reverberation not only gain realism but also provide additional information to users about surrounding space. The context switch of different aural attributes is done by using an API of the Sound Spatialization Framework. Therefore, when the sound sink move through two rooms, like a small bathroom and a large living room, the context of the sink switches and different sound is obtained. KW - VSVR Y1 - 2000 SP - 71 EP - 76 PB - University of Aizu CY - Aizu-Wakamatsu ER - TY - GEN A1 - Herder, Jens T1 - Interactive Sound Spatialization - a Primer T2 - MM News, University of Aizu Multimedia Center N2 - Sound spatialization is a technology which puts sound into the three dimensional space, so that it has a perceivable direction and distance. Interactive means mutually or reciprocally active. Interaction is when one action (e.g., user moves mouse) has direct or immediate influence to other actions (e.g., processing by a computer: graphics change in size). Based on this definition an introduction to sound reproduction using DVD and virtual environments is given and illustrated by applications (e.g., virtual converts). KW - DVD KW - Interactivity KW - Resource Management KW - Sound Spatialization KW - Virtual Concerts KW - VSVR Y1 - 2000 UR - http://vsvr.medien.hs-duesseldorf.de/publications/mmnews2000-8.pdf VL - 8 SP - 8 EP - 12 ER - TY - CHAP A1 - Yamazaki, Yasuhiro A1 - Herder, Jens T1 - Exploring Spatial Audio Conferencing Functionality in Multiuser Virtual Environments T2 - The Third International Conference on Collaborative Virtual Environments N2 - A chatspace was developed that allows conversation with 3D sound using networked streaming in a shared virtual environment. The system provides an interface to advanced audio features, such as a "whisper function" for conveying a confided audio stream. This study explores the use of spatial audio to enhance a user's experience in multiuser virtual environments. KW - chatspaces KW - groupware KW - narrowcasting functions KW - networked audio KW - spatial audio KW - VSVR Y1 - 2000 SP - 207 EP - 208 PB - ACM CY - San Francisco ER - TY - CHAP A1 - Herder, Jens A1 - Yamazaki, Yasuhiro T1 - A Chatspace Deploying Spatial Audio for Enhanced Conferencing T2 - Third International Conference on Human and Computer KW - VSVR Y1 - 2000 SP - 197 EP - 202 PB - University of Aizu CY - Aizu-Wakamatsu ER - TY - CHAP A1 - Herder, Jens T1 - Interactive Content Creation with Virtual Set Environments T2 - Fourth International Conference on Human and Computer N2 - Digital broadcasting enables interactive \sc tv, which presents new challenges for interactive content creation. Besides the technology for streaming and viewing, tools and systems are under development that extend traditional \sc tv studios with virtual set environments. This presentation reviews current technology and describes the requirements for such systems. Interoperability over the production, streaming, and viewer levels requires open interfaces. As the technology allow more interaction, it becomes inherent difficult to control the quality of the viewers experience KW - VSVR KW - digital broadcasting Y1 - 2001 PB - University of Aizu CY - Aizu-Wakamatsu ER - TY - JOUR A1 - Herder, Jens T1 - Interactive Content Creation with Virtual Set Environments JF - Journal of the 3D-Forum Society N2 - Digital broadcasting enables interactive \sc tv studios with virtual set environments. This presentation reviews current technology and describes the requirements for such systems. Interoperability over the production, streaming, and viewer levels requires open interfaces. As the technology allow more interaction, it becomes inherent difficult to control the quality of the viewers experience. KW - Interactive Media KW - Sound Spatialization KW - Virtual Sets KW - virtual studio KW - VSVR Y1 - 2001 VL - 15 IS - 4 SP - 53 EP - 56 ER - TY - CHAP A1 - Cohen, Michael A1 - Herder, Jens A1 - Martens, William T1 - Panel: Eartop computing and cyberspatial audio technology T2 - IEEE-VR2001: IEEE Virtual Reality KW - VSVR Y1 - 2001 SN - 0-7695-0948-7 SP - 322 EP - 323 PB - IEEE CY - Yokohama ER - TY - CHAP A1 - Herder, Jens T1 - Applications of Spatial Auditory Displays in the Context of Art and Music T2 - Human Supervision and Control in Engineering and Music KW - VSVR Y1 - 2001 PB - Universität Kassel CY - Kassel ER - TY - GEN A1 - Franz, Thomas T1 - Implementation of a Web-Based System for Managing a Supply Network Y1 - 2001 CY - Köln ER - TY - GEN T1 - 14 - Wahl zum Prodekan des Fachbereichs Medien. Verkündungsblatt der Fachhochschule Düsseldorf vom 16.09.2002 T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 14 KW - FHD KW - Wahl KW - Prodekan KW - Amtliche Mitteilungen KW - Änderung KW - Kommunikationstechnologie KW - Informationstechnologie KW - M KW - Medien Y1 - 2002 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-657 CY - Düsseldorf ER - TY - GEN T1 - 12 - Fachbereichsordnung für den Fachbereich Sozialpädagogik der Fachhochschule Düsseldorf (Teil 1), Fachbereichsordnung für den Fachbereich Medien der Fachhochschule Düsseldorf (Teil 2) vom 21.03.2002 T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 12 KW - Fachbereichsordnung KW - Sozialpädagogik KW - Medien KW - FHD KW - SK KW - Amtliche Mitteilungen KW - M Y1 - 2002 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-673 CY - Düsseldorf ER - TY - JOUR A1 - Herder, Jens A1 - Cohen, Michael T1 - The Helical Keyboard: Perspectives for Spatial Auditory Displays and Visual Music JF - Journal of New Music Research N2 - Auditory displays with the ability to dynamically spatialize virtual sound sources under real-time conditions enable advanced applications for art and music. A listener can be deeply immersed while interacting and participating in the experience. We review some of those applications while focusing on the Helical Keyboard project and discussing the required technology. Inspired by the cyclical nature of octaves and helical structure of a scale, a model of a piano-style keyboard was prepared, which was then geometrically warped into a helicoidal configuration, one octave/revolution, pitch mapped to height and chroma. It can be driven by MIDI events, real-time or sequenced, which stream is both synthesized and spatialized by a spatial sound display. The sound of the respective notes is spatialized with respect to sinks, avatars of the human user, by default in the tube of the helix. Alternative coloring schemes can be applied, including a color map compatible with chromastereoptic eyewear. The graphical display animates polygons, interpolating between the notes of a chord across the tube of the helix. Recognition of simple chords allows directionalization of all the notes of a major triad from the position of its musical root. The system is designed to allow, for instance, separate audition of harmony and melody, commonly played by the left and right hands, respectively, on a normal keyboard. Perhaps the most exotic feature of the interface is the ability to fork oneís presence, replicating subject instead of object by installing multiple sinks at arbitrary places around a virtual scene so that, for example, harmony and melody can be separately spatialized, using two heads to normalize the octave; such a technique effectively doubles the helix from the perspective of a single listener. Rather than a symmetric arrangement of the individual helices, they are perceptually superimposed in-phase, co-extensively, so that corresponding notes in different registers are at the same azimuth. KW - 3D audio KW - virtual reality KW - computer music KW - spatialization KW - spatial media KW - visual music KW - VSVR Y1 - 2002 VL - 31 IS - 3 SP - 269 EP - 281 ER - TY - JOUR A1 - Herder, Jens A1 - Wörzberger, Ralf A1 - Twelker, Uwe A1 - Albertz, Stefan T1 - Use of Virtual Environments in the Promotion and Evaluation of Architectural Designs JF - Journal of the 3D-Forum Society N2 - Virtual environments can create a realistic impression of an architectural space during the architectural design process, providing a powerful tool for evaluation and promotion during a project’s early stages. In comparison to pre-rendered animations, such as walkthroughs based on CAD models, virtual environments can offer intuitive interaction and a more life like experience. Advanced virtual environments allow users to change realtime rendering features with a few manipulations, switching between different versions while still maintaining sensory immersion. This paper reports on an experimental project in which architectural models are being integrated into interactive virtual environments, and includes demonstrations of both the possibilities and limitations of such applications in evaluating, presenting and promoting architectural designs. KW - virtual environments KW - architectural design KW - interactive walkthrough KW - design review KW - VSVR Y1 - 2002 VL - 16 IS - 4 SP - 117 EP - 122 ER - TY - GEN T1 - Fachbereich Medien T1 - Department of media N2 - Selbstdarstellung des Fachbereichs Medien der Fachhochschule Düsseldorf KW - Aussendarstellung KW - Fachbereich Medien KW - FHD Y1 - 2003 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-322 SN - 3-923669-67-3 CY - Düsseldorf ER - TY - GEN T1 - 18 - Institut für Medien, Kommunikation und Informationstechnologie, hier: Verwaltungs- und Benutzungsordnung vom 31.01.2003 T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 18 KW - FHD KW - Medien KW - Kommunikationstechnologie KW - Informationstechnologie KW - Verwaltungsordnung KW - Benutzungsordnung KW - Amtliche Mitteilungen KW - M Y1 - 2003 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-618 CY - Düsseldorf ER - TY - CHAP A1 - Herder, Jens A1 - Novotny, Thomas T1 - Spatial Sound Design and Interaction for Virtual Environments in the Promotion of Architectural Designs T2 - Third International Workshop on Spatial Media N2 - Virtual environment walkthrough applications are generally enhanced by a user’s interactions within a simulated architectural space, but the enhancement that stems from changes in spatial sound that are coupled with a user’s behavior are particularly important, especially within regard to creating a sense of place. When accompanied by stereoscopic image synthesis, spatial sound can immerse the user in a high-realism virtual copy of the real world. An advanced virtual environment that allow users to change realtime rendering features with a few manipulations has been shown to enable switching between different versions of a modeled space while maintaining sensory immersion. This paper reports on an experimental project in which an architectural model is being integrated into such an interactive virtual environment. The focus is on the spatial sound design for supporting interaction, including demonstrations of both the possibilities and limitations of such applications in presenting and promoting architectural designs, as well as in three-dimensional sketching. KW - spatial sound design KW - sketching KW - interaction KW - virtual environments KW - architectural design KW - interactive walkthrough KW - design review KW - VSVR Y1 - 2003 SP - 7 EP - 11 CY - Aizu-Wakamatsu ER - TY - JOUR A1 - Griesert, Arnfried A1 - Walczak, Oliver A1 - Herder, Jens T1 - Interactive Realtime Terrain Visualization for Virtual Set Applications JF - Journal of the 3D-Forum Society N2 - Virtual set environments for broadcasting become more sophisticated as well as the visual quality improves. Realtime interaction and production-specific visualization implemented through plugin mechanism enhance the existing systems like the virtual studio software 3DK. This work presents an algorithm which can dynamically manage textures of high resolution by prefetching them depending on their requirement in memory and map them on a procedural mesh in realtime. The main goal application of this work is the virtual representation of a flight over a landscape as part of weather reports in virtual studios and the interaction by the moderator. KW - 3D KW - VSVR KW - Virtual (TV) Studio Y1 - 2003 VL - 17 IS - 4 SP - 20 EP - 26 ER - TY - GEN T1 - 32 - Evaluationsordnung des Fachbereiches Medien (Teil1), Evaluationsordnung des Fachbereiches Wirtschaft (Teil 2) vom 20.08.2004 N2 - Aufgrund des § 6 Abs. 3 des Gesetzes über die Hochschulen im Lande Nordrhein-Westfalen (Hochschulgesetz - HG) vom 14. März 2000 hat der Fachbereich Medien der Fachhochschule Düsseldorf die folgende Evaluationsordnung erlassen: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 32 KW - Evaluationsordnung KW - W KW - Medien KW - Amtliche Mitteilungen KW - FHD KW - Wirtschaft KW - M KW - Verkündungsblatt Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1839 CY - Düsseldorf ER - TY - GEN T1 - 43 - Prüfungsordnung für den Studiengang Bachelor of Science in Medien und angewandte Informationstechnologie (Media and Applied Information Technology) an der Fachhochschule Düsseldorf vom 28.09.2004 N2 - Auf der Grundlage des § 2 Abs. 4 und des § 94 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz-HG) vom 14.03.2000 (GV. NRW S.190), zuletzt geändert durch Gesetz vom 16. Dezember 2003 (GV. NRW S. 772), hat die Fachhochschule Düsseldorf die folgende Prüfungsordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 43 KW - FHD KW - Prüfungsordnung KW - Amtliche Mitteilungen KW - Medien KW - Prüfungsrecht KW - M KW - Bachelor Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-460 CY - Düsseldorf ER - TY - GEN T1 - 44 - Prüfungsordnung für den Studiengang Master of Science in Virtuelle Realität (Virtual Reality) an der Fachhochschule Düsseldorf vom 29.09.2004 N2 - Auf der Grundlage des § 2 Abs. 4 und des § 94 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz-HG) vom 14.03.2000 (GV. NRW S.190), zuletzt geändert durch Gesetz vom 16. Dezember 2003 (GV. NRW S. 772), hat die Fachhochschule Düsseldorf die folgende Prüfungsordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 44 KW - Prüfungsordnung KW - Virtuelle Realität KW - Medien KW - Amtliche Mitteilungen KW - FHD KW - Prüfungsrecht KW - M KW - Master Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-470 CY - Düsseldorf ER - TY - CHAP A1 - Herder, Jens A1 - Jaensch, Kai A1 - Horst, Bruno A1 - Novotny, Thomas ED - Gausemeier, Jürgen ED - Grafe, Michael T1 - Testmärkte in einer Virtuellen Umgebung - Die Bestimmung von Preisabsatzfunktionen zur Unterstützung des Innovationsmanagements T2 - Augmented and Virtual Reality in der Produktentstehung N2 - Multimediale Technologien werden in der Marktforschung immer stärker eingesetzt, um flexible und kostengünstige Studien durchzuführen. Im Innovationsprozess kann dabei auf die langjährigen Erfahrungen zurückgegriffen werden, die durch den Einsatz der Computersimulation in der technischen Produktentwicklung zustande gekommen sind. In sehr frühen Phasen des Innovationsprozesses können durch Einsatz der neuen Technologien die Markteinführungskonzepte für neue Produkte getestet werden. Die Applikationen der virtuellen Realität bieten ein einzigartiges Potential, neue Produkte einschlieï‚lich des Marketingkonzeptes zu testen, ohne dass dieses Produkt bereits physisch vorhanden sein muss. Am Beispiel eines Elementes des Marketingkonzeptes, der Preispolitik, zeigt die vorliegende Studie auf, welches Potential die virtuelle Kaufsituation von Produkten bietet. Der Fokus des Projektes liegt auf der interaktiven Produktpräsentation in einer virtuellen Umgebung, die in eine Online-Befragung mit zusätzlichen Werbefilmen eingebettet ist. Visuell hochwertige 3D-Produktpräsentationen versetzen den Probanden in eine virtuelle Einkaufsumgebung, die einem realen Szenario entspricht. Die virtuellen Produkte werden in mehreren Kaufentscheidungsrunden zu unterschiedlichen Preisen angeboten. Der Preisuntersuchung geht eine Präsentation ausgewählter Werbespots sowie eine produktbezogene Befragung voraus. Im Anschluss an die virtuellen Preisentscheidungen werden die Eindrücke sowie einige Kontrollgröen abgefragt. In weitergehenden Studien dieser Art können die Wirkungen mehrerer Marketing-Instrumente zu einem Zeitpunkt untersucht werden, in dem sich die Produkte noch im Entwicklungsprozess befinden. Auf diesem Weg lassen sich auch Wettbewerbsvorteile bestehender Produkte effizienter erkennen und nutzen. Mit den hoch entwickelten Computer- und Visualisierungstechnologien ist ein mächtiges Werkzeug entstanden, das bereits für kommerzielle Präsentationen und Produktstudien eingesetzt wird. Zukünftig kann es auch in Kombination mit Internetanwendungen und klassischen Methoden der Marktforschung zu einem sehr frühen Zeitpunkt umfassende Erkenntnisse über ein Produkt liefern. KW - Virtuelle Umgebungen KW - 3D-Rendering KW - Mensch-Maschine-Kommunikation KW - Innovationsmanagement KW - Preisabsatzfunktion KW - Testmarkt KW - Produkttest KW - Markteinführungskonzept KW - FHD KW - VSVR Y1 - 2004 SN - 3-935433-58-1 VL - 149 SP - 97 EP - 110 PB - Heinz Nixdorf Institut, Universität Paderborn CY - Paderborn ER - TY - CHAP A1 - Herder, Jens A1 - Vonolfen, Wolfgang A1 - Griesert, Arnfried A1 - Heuer, Stefan A1 - Hoffmann, Ansgar A1 - Höppner, Bernd T1 - Interactive Virtual Set Applications for Post Production T2 - University of Aizu 2004 – Seventh International Conference on Human N2 - Virtual set environments for broadcasting become more sophisticated as well as the visual quality improves. Realtime interaction and production-specific visualization implemented through plugin mechanism enhance the existing systems like the 3DK. This work presents the integration of the Intersense IS-900 SCT camera tracking and 3D interaction into the 3DK virtual studio environment. The main goal of this work is the design of a virtual studio environment for post productions, which includes video output as well as media streaming formats such as MPEG-4. The systems allows high quality offline rendering during post production and 3D interaction by the moderator during the recording. KW - interaction KW - tracking KW - virtual set environments KW - Virtual (TV) Studio KW - post production KW - MPEG-4 KW - FHD KW - VSVR Y1 - 2004 CY - Aizu-Wakamatsu ER - TY - JOUR A1 - Franz, Thomas A1 - Davis, Steve T1 - Designing a Web-Based System For Managing a Supply Network JF - Issues in Information Systems Y1 - 2004 UR - http://www.thomas-franz.de/publications/FranzDavis-iacis.pdf SN - 1529-7314 VL - V IS - 2 SP - 447 EP - 453 ER - TY - GEN A1 - Juttner, Carsten T1 - Echtzeit-Verfahren zur Beleuchtung einer computergenerierten 3D-Szene mit Videotexturen N2 - Der Autor stellt eine Methode vor, um einer computergenerierten Szene auf neue Art und Weise zusätzlichen Realismus zu verleihen. Er tut dies unter Erweiterung des traditionellen festen Shadingmodells durch Bildsequenzen (nachfolgend Videotextur genannt), welche die Oberflächen anderer Objekte innerhalb einer Szene in Echtzeit beleuchten. Im Rahmen der Diplomarbeit wurde eine Beispielanwendung erstellt, in der eine vorbeiziehende Landschaft (Videotextur) auf den Innenraum eines computergenerierten Zuges (3D-Polygon-Geometrie) einen Beleuchtungseinfluß ausübt. Diese Integration von real gefilmtem Material und computergenerierten Bildern ist eine übliche Vorgehensweise bei Spezialeffekten für Film und Fernsehen, aber erst seit kurzem bietet die durchschnittliche PC-Grafikhardware entsprechende Möglichkeiten unter Echtzeitbedingungen an. Um dieses Vorhaben umzusetzen wird umfangreicher Gebrauch der OpenGL Shader- Hochsprache gemacht, durch die ein Shaderentwickler in der Lage ist, mit einem C-ähnlichen Programm die Pixelberechnungsfunktionalität der Grafikkarte seinen W ünschen entsprechend anzupassen. N2 - The author presents a novel approach to add an additional degree of realism to a computer generated scene by using a sequence of images (called video texture) to light up other objects in real time. He does this by enhancing the traditional fixed shading model using the video textures as part of the light properties. An exemplary application showcases this approach by using a filmed landscape (video texture) which affects the lighting of the interior of a computer generated train (3D polygonal geometry). Combining filmed material and computer generated images has long been standard practice in special effects departments but it was not until recently that the average graphics hardware is becoming capable to produce these effects in realtime. To accomplish the given task the author makes extensive use of the OpenGL high-level shader language (GLSL) which lets the shader developer write C-like programs to alter the behaviour of the graphics card's pixel computing functionality which previously was fixed to only a limited set of operations. T2 - Method for lighting a computer generated 3D scene in real time using video textures KW - Shadersprache KW - Echtzeit KW - Videotexturen KW - Visualisierung KW - Grafikprozessor KW - shading language KW - real time KW - video textures KW - visualisation KW - graphics processor unit KW - FHD KW - Diplomarbeit Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1633 CY - Düsseldorf ER - TY - GEN T1 - 60 - Genehmigung des Bachelor-Studienganges "Medientechnik" an der Fachhochschule Düsseldorf vom 22.06.2005 N2 - Aufgrund des § 2 Abs. 4, § 9 und des § 108 Abs. 2 des Gesetzes über die Hochschulen im Lande Nordrhein-Westfalen (Hochschulgesetz - HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 16. Dezember 2003 (GV. NRW. S. 772), genehmige ich den T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 60 KW - Medientechnik KW - Genehmigung KW - Bachelor KW - FHD KW - Amtliche Mitteilungen KW - Medien KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1774 CY - Düsseldorf ER - TY - GEN T1 - 61 - Satzung zur Einstellung des Diplomstudienganges Medientechnik an der Fachhochschule Düsseldorf vom 22.06.2005 N2 - Aufgrund des § 2 Abs. 4, § 9 und des § 108 Abs. 2 des Gesetzes über die Hochschulen im Lande Nordrhein-Westfalen (Hochschulgesetz - HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 16. Dezember 2003 (GV. NRW. S. 772),hat die Fachhochschule Düsseldorf die folgende Ordnung als Satzung erlassen: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 61 KW - Medientechnik KW - Satzung KW - Einstellung KW - Diplom KW - Medien KW - FHD KW - Amtliche Mitteilungen KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1781 CY - Düsseldorf ER - TY - GEN A1 - Struchholz, Holger T1 - Interaktive Visualisierung und Abhörung zur Klangabstrahlung von Musikinstrumenten – Interpolation und Filterung mehrkanaliger Aufnahmen unter Verwendung der geometrischen Relationen N2 - Ziel des Projektes ist die Entwicklung einer virtuellen Umgebung, die das charakteristische Klangabstrahlverhalten eines Musikinstruments in Echtzeit erfahrbar macht. Es wird eine virtuelle Umgebung geschaffen, in der sich der Benutzer frei um ein Musikinstrument bewegen kann und in Echtzeit ein akustisches und visuelles Feedback erhält. Durch die Verbindung der auditiven und visuellen Elemente und die Möglichkeit der Interaktion, wird das Erleben und die Wahrnehmung der Effekte intensiviert. Die Simulation des charakteristischen Klangabstrahlverhaltens erfolgt nicht durch eine rechenaufwändige Klangsynthese wie z.B. Physical Modeling, sondern basiert auf der Lautstärkeinterpolation einer Mehrkanalaufnahme. Die Verwendung der realen Aufnahmen ermöglicht eine annähernd naturgetreue Abbildung des Klangabstrahlverhaltens und ist, im Gegensatz zu rechenaufwändigen Klangsyntheseverfahren, echtzeitfähig. Zusätzlich wurde ein einfacher Filter entwickelt, der das charakteristische Klangabstrahlverhalten des Instruments eher qualitativ simuliert und sich problemlos in Echtzeit 3D-Anwendungen implementieren lässt. Die beiden entwickelten Methoden zur Simulation des Klangabstrahlverhaltens wurden mittels Spektralanalyse und anhand eines durchgeführten Hörtests auf ihre Funktionalität und ihre Gültigkeit überprüft. N2 - This project aims at developing a virtual environment allowing the characteristic sound radiation patterns of a musical instrument to be experienced in real-time. A virtual environment will be created within which the user may freely move around a musical instrument, thereby receiving acoustic and visual feedback in real-time. Both the experience and the perception of auditory and visual effects are intensified by the combination of acoustic and visual elements, as well as the option of user interaction. The simulation of characteristic sound radiation pattern is based on interpolating the volume of a multi-channel recording, rather than a computationally intensive sound synthesis, as, for example, Physical Modeling. In contrast to computationally intensive sound synthesis, the use of real recordings offers a near-natural mapping of the sound radiation patterns in real-time. Additionally, a simple filter has been developed enabling the qualitative simulation of an instrument’s characteristic sound radiation patterns to be easily implemented within real-time 3Dapplications. Both methods of simulating sound radiation patterns have been evaluated with respect to their functionality and validity by means of a spectral analysis and an auditory experiment. KW - Klangabstrahlverhalten KW - Musikinstrumente KW - Echtzeit KW - Audiosimulation KW - FHD KW - Diplomarbeit Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1727 CY - Düsseldorf ER - TY - GEN T1 - 58 - Erste Satzung zur Änderung der Evaluationsordnung des Fachbereichs Medien an der Fachhochschule Düsseldorf vom 09.05.2005 N2 - Aufgrund des § 2 Abs. 4 und des § 6 Abs. 3 des Gesetzes über die Hochschulen im Lande Nordrhein-Westfalen (Hochschulgesetz - HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Änderungssatzung erlassen: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 58 KW - Evaluationsordnung KW - Änderung KW - Amtliche Mitteilungen KW - Medien KW - FHD KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1790 CY - Düsseldorf ER - TY - GEN T1 - 59 - Evaluationsordnung des Fachbereichs Medien an der Fachhochschule Düsseldorf vom 22.06.2005 N2 - Aufgrund des § 2 Abs. 4 und des § 6 Abs. 3 des Gesetzes über die Hochschulen im Lande Nordrhein-Westfalen (Hochschulgesetz - HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Satzung erlassen: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 59 KW - Evaluationsordnung KW - Amtliche Mitteilungen KW - FHD KW - Medien KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1809 CY - Düsseldorf ER - TY - GEN T1 - 63 - Prüfungsordnung für den Bachelor-Studiengang Medien und angewandte Informationstechnologie (Media and Applied Information Technology) an der Fachhochschule Düsseldorf vom 09.08.2005 N2 - Aufgrund des § 2 Abs. 4 und des § 94 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Prüfungsordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 63 KW - Prüfungsordnung KW - Bachelor KW - Medien KW - PO2005 KW - Amtliche Mitteilungen KW - Prüfungsrecht KW - M KW - FHD KW - Medien und angewandte Informationstechnologie Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1842 CY - Düsseldorf ER - TY - GEN T1 - 64 - Studienordnung für den Bachelor-Studiengang Medien und angewandte Informationstechnologie (Media Applied Information Technology) an der Fachhochschule Düsseldorf vom 09.08.2005 N2 - Aufgrund des § 2 Abs. 4 und des § 86 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Studienordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 64 KW - Studienordnung KW - Bachelor KW - Medien KW - Medien und angewandte Informationstechnologie KW - Informationstechnologie KW - FHD KW - Amtliche Mitteilungen KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1854 CY - Düsseldorf ER - TY - GEN T1 - 65 - Prüfungsordnung für den Master-Studiengang Virtuelle Realität an der Fachhochschule Düsseldorf vom 09.08.2005 N2 - Aufgrund des § 2 Abs. 4 und des § 94 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Prüfungsordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 65 KW - Prüfungsordnung KW - Virtuelle Realität KW - Amtliche Mitteilungen KW - Prüfungsrecht KW - Master Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1866 CY - Düsseldorf ER - TY - GEN T1 - 66 - Studienordnung für den Master-Studiengang Virtuelle Realität an der Fachhochschule Düsseldorf vom 09.08.2005 N2 - Aufgrund des § 2 Abs. 4 und des § 86 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Prüfungsordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 66 KW - Studienordnung KW - Master KW - Virtuelle Realität KW - Amtliche Mitteilungen KW - Prüfungsrecht Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1871 CY - Düsseldorf ER - TY - GEN A1 - Ophey, Peter T1 - Sicherung des Zugangs zu Netzwerkdiensten der Fachhochschule Düsseldorf N2 - Der Autor untersucht im Rahmen dieser Diplomarbeit die Sicherheit des Zugangs zu Netzwerkdiensten in der Fachhochschule Düsseldorf. Dabei werden sicherheitsrelevante Fragen wie Klartext Kommunikation bei der Authentifizierung und beim Transport der Daten über Netzwerkdienste beschrieben und Alternativen hierzu aufgezeigt. Im Rahmen der Diplomarbeit wurde die Teilnahme der Fachhochschule Düsseldorf am Pilotprojekt DFN-PKI-2 für Public Key Infrastrukturen des Deutschen Forschungsnetzes initiiert und organisiert. Weiterhin stellt der Autor die PKI-Technologie und deren praktische Einsatz anhand eines VPN Dienstes zur Sicherung der bestehenden Netzwerkdienste vor. N2 - The author examines the security of the access to network services in the University of Applied Sciences Duesseldorf in the context of this thesis (diploma). Security-relevant questions are described such as plain-text communication at the authentication process and in the case of the transport of the data over network services and pointed out alternatives for this. In the context of the thesis (diploma) the participation of the University of Applied Sciences Duesseldorf at the pilot project DFN-PKI-2 for Public key infrastructures of the German research net (Deutsches Forschungsnetz) was initiated and organized. Further the author presents the PKI technology and their field use on the basis of a VPN service to secure (and extend) the existing network services. T2 - Securing the access to network-services of the University of Applied Sciences Düsseldorf KW - Network Security KW - Public Key Infrastrukturen (PKI) KW - Virtual Private Networks (VPN) KW - Authentifizierung KW - (virtuelle) Hochschulverwaltung KW - Authentication KW - (virtual) University administration KW - FHD KW - Diplomarbeit KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-2240 CY - Düsseldorf ER - TY - GEN T1 - 82 - Fachbereichsordnung für den Fachbereich Medien an der Fachhochschule Düsseldorf vom 06.10.2005 N2 - Westfalen (Hochschulgesetz-HG) vom 14.3.2000 in der Fassung der Bekanntmachung vom Aufgrund des § 25 Abs. 4 des Gesetzes über die Hochschulen des Landes Nordrhein-21.3.2000 in Verbindung mit der Grundordnung der Fachhochschule Düsseldorf vom 29.6.2001 hat der Fach-bereichsrat des Fachbereichs Medien der Fachhochschule Düsseldorf folgende Fachbereichsordnung erlassen T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 82 KW - Fachbereichsordnung KW - Medien KW - FHD KW - Amtliche Mitteilungen KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-2269 CY - Düsseldorf ER - TY - GEN T1 - 75 - Prüfungsordnung für den Bachelor-Studiengang Medientechnik an der Fachhochschule Düsseldorf vom 30.08.2005 N2 - Aufgrund des § 2 Abs. 4 und des § 94 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Prüfungsordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 75 KW - Prüfungsordnung KW - Bachelor KW - Medientechnik KW - Medien KW - Amtliche Mitteilungen KW - PO2005 KW - Prüfungsrecht KW - M KW - FHD Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1990 CY - Düsseldorf ER - TY - GEN A1 - Plohmann, Eva A1 - Wolfrum, Andreas T1 - Medienrecht N2 - Folien des Vortrags im Institut für Medien, Kommunikation und Informationstechnologie der Fachhochschule Düsseldorf am 15./16. Juni 2005; Inhalt: Schutzinhalt, Bedeutung, Rechtsgrundlagen, Urheberrecht und andere Schutzrechte; KW - Medienrecht KW - Urheberrecht KW - FHD Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-1985 ER - TY - GEN T1 - 78 - Erste Satzung zur Änderung der Fachbereichsordnung des Fachbereichs Medien an der Fachhochschule Düsseldorf vom 06.10.2005 N2 - Aufgrund des § 25 Abs. 4 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz – HG) vom 14. März 2000, zuletzt geändert durch Gesetz vom 30. November 2004 und in Verbindung mit der Grundordnung der Fachhochschule Düsseldorf (GO) vom 21. Juni 2001, zuletzt geändert durch Änderungssatzung vom 14. März 2003, hat der Fachbereich Medien folgende Änderungssatzung erlassen: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 78 KW - Satzung KW - Fachbereichsordnung KW - Änderung KW - FHD KW - Medien KW - Amtliche Mitteilungen KW - M Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-2131 CY - Düsseldorf ER - TY - CHAP A1 - Dahm, Markus T1 - Broad study on the usability of mobile phones T2 - Conf. Proc. Humans and Computers HuC 2005, Aizu, Japan N2 - A mobile phone the size of a candy bar offers dozens of complex functions, a masterpiece of engineering. Unfortunately, the more functions are available, the less they are accessible to the average user. The design of the user interface suffers from a lack of suitability for the tasks, does not conform to user expectations and a suboptimal self-descriptiveness. The usability of modern mobile phones was tested in a broad survey with over 1300 participants. An internet based simulation offered tasks and an online evaluation. It could be pointed out that mobile phones are not only hard to access for novices but also those who consider themselves experts have difficulties when confronted with unknown functions or another brand of phone. Approaches to increase the usability are discussed. KW - User Interface Design KW - Usability Study KW - Mobile Phone KW - Inclusive Design Y1 - 2005 SP - 249 EP - 254 CY - Aizu ER - TY - CHAP A1 - Herder, Jens A1 - Wörzberger, Ralf A1 - Juttner, Carsten A1 - Twelker, Uwe ED - Gausemeier, Jürgen ED - Grafe, Michael T1 - Verwendung von Grafikkarten-Prozessoren (GPUs) für eine interaktive Produktvisualisierung in Echtzeit unter Verwendung von Shadern und Videotexturen T2 - Augmented and Virtual Reality in der Produktentstehung N2 - Die Visualisierung von Produkten in Echtzeit ist in vielen Bereichen ein hilfreicher Schritt, um potentiellen Kunden eine Vorstellung vom Einsatzgebiet und einen Überblick über die finale Anwendung zu erlauben. In den letzten Jahren haben neue Technologien in der Grafikkartenindustrie dazu geführt, dass früher nur auf teuren Grafikworkstations verfügbare Möglichkeiten nun auch mit relativ kostengünstigen Karten, welche für den Einsatz in Standard-PCs konzipiert wurden, realisierbar sind. Es wird an einem Modellentwurf des Innenraums des People Cargo Movers gezeigt, wie die Beleuchtung innerhalb einer Echtzeitvisualisierung durch Shader realisiert werden kann. Als Lichtquelle wird dabei eine Landschaftsaufnahme herangezogen, welche als eine von mehreren Videotexturen eingebunden wurde. Außerdem werden real im virtuellen Studio gefilmte Personen im Innenraum gleichermaï‚en über Videotexturen dargestellt und ebenfalls durch die Landschaft beleuchtet. KW - 3D-Echtzeitrendering KW - GPU KW - shader KW - Video Texturen KW - virtual prototyping KW - Echtzeitanwendung KW - FHD KW - VSVR Y1 - 2005 VL - 167 SP - 23 EP - 36 PB - Heinz Nixdorf Institut, Universität Paderborn CY - Paderborn ER - TY - JOUR A1 - Novotny, Tom A1 - Jaensch, Kai A1 - Herder, Jens T1 - A Database Driven and Virtual Reality supported Environment for Marketing Studies JF - Journal of the 3D-Forum Society N2 - In today’s market research mechanisms multi modal technologies are significant tools to perform flexible and price efficient studies for not only consumer products but also consumer goods. Current appraisal mechanisms in combination with applied computer graphics can improve the assessment of a product’s launch in the very early design phase or an innovation process. The combination of online questionnaires, Virtual Reality (VR) applications and a database management system offers a powerful tool to let a consumer judge products as well as innovated goods even without having produced a single article. In this paper we present an approach of consumer good studies consisting of common as well as interactive VR product presentations and online questionnaires bases on a bidirectional database management solution to configure and manage numerous studies, virtual sets, goods and participants in an effective way to support the estimation of the received data. Non-programmers can create their test environment including a VR scenario very quickly without any effort. Within the extensive knowledge of consumer goods, marketing instruments can be defined to shorten and improve the rollout process in the early product stages. KW - virtual environments KW - databases KW - marketing studies KW - FHD KW - VSVR Y1 - 2005 VL - 19 IS - 4 SP - 95 EP - 101 ER - TY - CHAP A1 - Franz, Thomas A1 - Staab, Steffen ED - Decker, Stefan ED - Park, Jack ED - Quan, Dennis ED - Sauermann, Leo T1 - SAM: Semantics Aware Instant Messaging for the Networked Semantic Desktop. revised and extended version T2 - Proceedings of the 1st Workshop On The Semantic Desktop. 4th International Semantic Web Conference Y1 - 2005 UR - http://www.thomas-franz.de/publications/franzstaab-sam.pdf N1 - This work is conducted with respect to the upcoming project Knowledge Sharing and Reuse across Media (X-Media), funded by the Information Society Technologies (IST) 6th Framework Programme. SP - 1 EP - 15 CY - Galway ER - TY - THES A1 - Franz, Thomas T1 - Design and Prototypical Implementation of a Platform for Personalized Recommender Systems Y1 - 2005 CY - Freiburg ER - TY - GEN T1 - 102 - Prüfungsordnung für den Master-Studiengang Virtuelle Realität an der Fachhochschule Düsseldorf vom 06.07.2006 N2 - Aufgrund des § 2 Abs. 4 und des § 94 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 30. November 2004 (GV. NRW. S. 752), hat die Fachhochschule Düsseldorf die folgende Prüfungsordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 102 KW - Prüfungsordnung KW - Amtliche Mitteilungen KW - PO2006 KW - Medien KW - Master KW - M KW - Virtuelle Realität KW - Prüfungsrecht KW - FHD Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-2931 CY - Düsseldorf ER - TY - GEN T1 - 101 - Erste Satzung zur Änderung der Prüfungsordnung für den Master-Studiengang Virtuelle Realität an der Fachhochschule Düsseldorf vom 06.07.2006 N2 - Aufgrund des § 2 Abs. 4 und des § 94 Abs. 1 des Gesetzes über die Hochschulen im Lande Nordrhein-Westfalen (Hochschulgesetz - HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 21. März 2006 (GV. NRW. S. 119), hat die Fachhochschule Düsseldorf die folgende Satzung erlassen: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 101 KW - Prüfungsordnung KW - M KW - PO2005 KW - Medien KW - Master KW - Amtliche Mitteilungen KW - Satzung KW - Änderung KW - Prüfungsrecht KW - FHD KW - Virtuelle Realität Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-2852 CY - Düsseldorf ER - TY - GEN T1 - 103 - Ordnung zur Feststellung der besonderen Vorbildung (VorbO) für den Master-Studiengang Virtuelle Realität an der Fachhochschule Düsseldorf vom 06.07.2006 N2 - Aufgrund des § 2 Abs. 4 und des § 66 Abs. 2 des Gesetzes über die Hochschulen im Lande Nordrhein-Westfalen (Hochschulgesetz - HG) vom 14. März 2000 (GV.NRW S. 190), zuletzt geändert durch Gesetz vom 21. März 2006 (GV. NRW. S. 119), hat die Fachhochschule Düsseldorf die folgende Ordnung als Satzung erlassen: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 103 KW - FHD KW - Medien KW - Master KW - Virtuelle Realität KW - Festellung der besondere Vorbildung (VorbO) KW - M KW - Amtliche Mitteilungen Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-2942 CY - Düsseldorf ER - TY - CHAP A1 - Hatebur, Denis A1 - Heisel, Maritta A1 - Schmidt, Holger ED - Müller, Günter T1 - Security Engineering Using Problem Frames T2 - Emerging Trends in Information and Communication Security: International Conference, ETRICS 2006, Freiburg, Germany, June 6-9, 2006. Proceeding KW - security requirement KW - problem frames KW - security problem KW - security engineering KW - sequence diagram Y1 - 2006 UR - https://link.springer.com/chapter/10.1007/11766155_17 SN - 978-3-540-34640-1 U6 - https://doi.org/10.1007/11766155_17 VL - LNCS, 3995 SP - 238 EP - 253 PB - Springer CY - Berlin, Heidelberg ER - TY - CHAP A1 - Schmidt, Holger A1 - Wentzlaff, Ina ED - Gruhn, Volker ED - Oquendo, Flavio T1 - Preserving Software Quality Characteristics from Requirements Analysis to Architectural Design T2 - Software Architecture: Third European Workshop, EWSA 2006, Nantes, France, September 4-5, 2006, Revised Selected Papers Y1 - 2006 UR - https://link.springer.com/chapter/10.1007/11966104_14 SN - 978-3-540-69271-3 U6 - https://doi.org/10.1007/11966104_14 VL - LNCS, 4344 SP - 189 EP - 203 PB - Springer CY - Berlin, Heidelberg ER - TY - BOOK A1 - Dahm, Markus T1 - Grundlagen der Mensch-Computer-Interaktion N2 - Die Interaktion zwischen Mensch und Computer ist ein sehr interessanter und immer wichtiger werdender Aspekt bei der Entwicklung von Software. In diesem Buch erfahren Sie daher - Wie Menschen und Computer kommunizieren, handeln und reagieren - Welche Interaktionsformen es für die Kommunikation mit dem Computer gibt - Wie Sie diese Kenntnisse nutzen können, um Programme zu entwickeln, die der Anwender erfolgreich nutzen kann KW - Mensch-Maschine-Kommunikation Y1 - 2006 SN - 978-3-8273-7175-1 PB - Pearson Studium CY - München ; Boston [u.a.] ER - TY - RPRT A1 - Strauß, Friedrich A1 - Beck, Astrid A1 - Dahm, Markus A1 - Hamborg, Kai-Christoph A1 - Heers, Rainer A1 - Heinecke, Andreas M. T1 - Curriculum für ein Basismodul zur Mensch-Computer- Interaktion: GI-Empfehlungen N2 - Das Gebiet Mensch-Computer-Interaktion umfasst die Analyse, Gestaltung und Bewertung menschen- und aufgabengerechter Computeranwendungen. Alle Personen die Software definieren, gestalten und erstellen sollen ein Mindestverständnis für die Anforderungen an die Gebrauchstauglichkeit (Usability) von interaktiven Systemen besitzen. Das vorliegende Curriculum beschreibt ein Basismodul für die Vermittlung des hierfür erforderlichen Wissens. Es ist ein Ziel der Gesellschaft für Informatik, dass die jeweilige Ausbildung der oben genannten Personen solch ein Basismodul enthält. KW - Empfehlung KW - Mensch-Computer-Kommunikation Y1 - 2006 PB - Gesellschaft für Informatik e.V. (GI) CY - Bonn ER - TY - JOUR A1 - Juttner, Carsten A1 - Herder, Jens T1 - Lighting an Interactive Scene in Real-time with a GPU and Video Textures JF - Journal of the 3D-Forum Society N2 - The presentation of virtual environments in real time has always been a demanding task. Specially designed graphics hardware is necessary to deal with the large amounts of data these applications typically produce. For several years the chipsets that were used allowed only simple lighting models and fixed algorithms. But recent development has produced new graphics processing units (GPUs) that are much faster and more programmable than their predecessors. This paper presents an approach to take advantage of these new features. It uses a video texture as part of the lighting calculations for the passenger compartment of a virtual train and was run on the GPU of a recent PC graphics card. The task was to map the varying illumination of a filmed landscape onto the virtual objects and also onto another video texture (showing two passengers), thereby enhancing the realism of the scene. KW - graphics processing unit KW - shader programming KW - video textures KW - virtual prototyping KW - FHD KW - VSVR Y1 - 2006 VL - 20 IS - 1 SP - 22 EP - 28 ER - TY - CHAP A1 - Herder, Jens A1 - Jaensch, Kai A1 - Garbe, Katharina ED - Gausemeier, Jürgen ED - Grafe, Michael T1 - Haptische Interaktionen in Testumgebungen für Produktpräsentation in Virtuellen Umgebungen T2 - Augmented and Virtual Reality in der Produktentstehung N2 - Durch den vermehrten Einsatz von multimedialen Technologien werden in der Marktforschung die Möglichkeiten der Durchführung flexibler und kostengünstiger Studien gegeben. In sehr frühen Phasen des Innovationsprozesses als Teil der Marktforschung können durch Einsatz von Virtuellen Umgebungen die Markteinführungskonzepte für neue Produkte getestet werden. Mittels Anwendungen der Virtuellen Realität können neue Produkte einschlieï‚lich des Marketingkonzeptes auch haptisch getestet werden, ohne dass dieses Produkt bereits physisch vorhanden sein muss. Informationen werden dem Benutzer in Virtuellen Umgebungen hauptsächlich visuell und ergänzend auditiv übermittelt. Verbreitete Benutzerschnittstellen sind Interaktionsgeräte wie Stylus und Wand. Durch die haptische Wahrnehmung werden Informationen menschengerechter, effektiver und intuitiver wahrgenommen. Objekte in einer virtuellen Umgebung können durch den Einsatz haptischer Interaktionsgeräte ertastet und erfühlt werden und machen dadurch eine differenziertere Beurteilung und Einschätzung durch den Benutzer eben dieser Objekte möglich. Der Fokus des vorliegenden Projektes liegt daher auf der interaktiven haptischen Produktpräsentation in einer virtuellen Einkaufsumgebung, die in Online-Befragungen mit zusätzlichen Werbefilmen eingebettet ist. Als Nebenprodukt wurde das Werkzeug Open Inventor um Knoten zur Modellierung von haptischen Szeneneigenschaften erweitert. KW - Haptik KW - Virtuelle Umgebungen KW - Interaktion KW - Mensch-Maschine-Kommunikation KW - Testumgebung KW - Produkttest KW - FHD KW - VSVR Y1 - 2006 SN - 3-939350-07-9 VL - 188 SP - 87 EP - 99 PB - Heinz Nixdorf Institut, Universität Paderborn CY - Paderborn ER - TY - JOUR A1 - Struchholz, Holger A1 - Herder, Jens A1 - Leckschat, Dieter T1 - Sound radiation simulation of musical instruments based on interpolation and filtering of multi-channel recordings JF - Journal of the 3D-Forum Society N2 - With the virtual environment developed here, the characteristic sound radiation patterns of musical instruments can be experienced in real-time. The user may freely move around a musical instrument, thereby receiving acoustic and visual feedback in real-time. The perception of auditory and visual effects is intensified by the combination of acoustic and visual elements, as well as the option of user interaction. The simulation of characteristic sound radiation patterns is based on interpolating the intensities of a multichannel recording and offers a near-natural mapping of the sound radiation patterns. Additionally, a simple filter has been developed, enabling the qualitative simulation of an instrument’s characteristic sound radiation patterns to be easily implemented within real-time 3D applications. Both methods of simulating sound radiation patterns have been evaluated for a saxophone with respect to their functionality and validity by means of spectral analysis and an auditory experiment. KW - sound radiation pattern KW - audio interpolation KW - audio filtering KW - FHD KW - VSVR Y1 - 2006 VL - 20 IS - 1 SP - 41 EP - 47 ER - TY - CHAP A1 - Herder, Jens T1 - Matching Light for Virtual Studio TV Productions T2 - 9th International Conference on Human and Computer N2 - High dynamic range environments maps based on still images or video streams are used for computer animation or interactive systems. The task of realistic light setup of scenes using captured environment maps might be eased as well as the visual quality improves. In this article, we discuss the light setting problem for virtual studio (tv) layout and system become more complex to handle this new feature of studio light capturing. The analysis of system requirements identifies the technical challenges. KW - VSVR KW - Animation KW - Virtual (TV) Studio Y1 - 2006 SP - 158 EP - 162 CY - Aizu-Wakamatsu ER - TY - JOUR A1 - Weber, Stephan A1 - Kuttler, Wilhelm A1 - Weber, Konradin T1 - Flow characteristics and particle mass and number concentration variability within a busy urban street canyon JF - Atmospheric Environment Y1 - 2006 U6 - https://doi.org/10.1016/j.atmosenv.2006.07.002 VL - 40 IS - 39 SP - 7565 EP - 7578 PB - Elsevier ER - TY - CHAP A1 - Geiger, Christian A1 - Paelke, Volker A1 - Gansen, Ivonne ED - Hutchison, David ED - Kanade, Takeo ED - Kittler, Josef ED - Kleinberg, Jon M. ED - Mattern, Friedemann ED - Mitchell, John C. ED - Naor, Moni ED - Nierstrasz, Oscar ED - Pandu Rangan, C. ED - Steffen, Bernhard ED - Sudan, Madhu ED - Terzopoulos, Demetri ED - Tygar, Dough ED - Vardi, Moshe Y. ED - Weikum, Gerhard ED - Göbel, Stefan ED - Malkewitz, Rainer ED - Iurgel, Ido T1 - Navigating by Following Stories T2 - Technologies for Interactive Digital Storytelling and Entertainment, Third International Conference, TIDSE 2006, Darmstadt, Germany, December 4-6, 2006, Proceedings Y1 - 2006 UR - https://doi.org/10.1007/11944577_32 SN - 978-3-540-49934-3 U6 - https://doi.org/10.1007/11944577_32 SP - 324 EP - 333 PB - Springer CY - Berlin, Heidelberg ER - TY - CHAP A1 - Staab, Steffen A1 - Franz, Thomas A1 - Görlitz, Olaf A1 - Saathoff, Carsten A1 - Schenk, Simon A1 - Sizov, Sergej ED - Esposito, Floriana ED - Raś, Zbigniew W. ED - Malerba, Donato ED - Semeraro, Giovanni T1 - Lifecycle Knowledge Management: Getting the Semantics Across in X-Media T2 - Foundations of Intelligent Systems: 16th International Symposium, ISMIS 2006, Bari, Italy, September 27-29, 2006. Proceedings Y1 - 2006 UR - http://www.thomas-franz.de/publications/ismis.pdf U6 - https://doi.org/10.1007/11875604_1 VL - Lecture Notes in Computer Science, 4203 SP - 1 EP - 10 PB - Springer CY - Berlin, Heidelberg ER - TY - CHAP A1 - Franz, Thomas A1 - Saathoff, Carsten A1 - Gorlitz, Olaf A1 - Ringelstein, Christoph A1 - Staab, Steffen T1 - SEA: A Lightweight and Extensible Semantic Exchange Architecture T2 - 2nd Workshop on Innovations in Web Infrastructure. 15th International World Wide Web Conference, Edinburgh, Scotland Y1 - 2006 UR - https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.96.1639&rep=rep1&type=pdf SP - 1 EP - 7 CY - Edinburgh ER - TY - CHAP A1 - Franz, Thomas A1 - Saathoff, Carsten A1 - Görlitz, Olaf A1 - Ringelstein, Christoph A1 - Staab, Steffen T1 - SEA: Introducing the Semantic Exchange Architecture T2 - Demos and Posters of the 3rd European Semantic Web Conference (ESWC 2006), Budva, Montenegro, 11th - 14th June, 2006 KW - Poster Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?Poster UR - https://www.eswc2006.org/poster-papers/FP19-Franz.pdf CY - Budva ER - TY - CHAP A1 - Herder, Jens A1 - Kronenwett, Ralf A1 - Lambertz, Simone A1 - Kiefer, Georg A1 - Freihoff, Johann ED - Heinecke, A. M. ED - Paul, H. T1 - Interaktive Echtzeit-3D-Visualisierung Webbasierte Darstellung: Mobilisierung und Homing von Blutstammzellen T2 - Mensch and Computer 2006: Mensch und Computer im Struktur Wandel N2 - Die interaktive Echtzeit 3D-Visualisierung Mobilisierung und Homing von Blutstammzellen wurde konzipiert, um ein sehr komplexes medizinisches Wissen mit den Mitteln der 3-dimensionalen Visualisierung in Echtzeit und des Internets sowie der daraus resultierenden Interaktivität aufzubereiten. Dies musste auf einer Ebene geschehen, die es hinterher auch jedem Nicht-Mediziner erlaubt, die grundlegenden biologischen und medizinischen Sachverhalte nachzuvollziehen. Das Resultat: Eine informative und didaktische Anwendung, aus einer Mischung von interaktiven 3D-Stationen und erklärenden 3D-Animationen. Diskutiert werden die Methodik der Konzeptionsphase und die Interaktionstechniken. KW - Interaktionsmodellierung KW - Visualisierung KW - Immersion KW - Visualisierung KW - eLearning KW - Blutstammzellen KW - Lehre KW - VSVR KW - Virtual Reality Y1 - 2006 SP - 405 EP - 409 PB - Oldenbourg Verlag CY - München ER - TY - GEN A1 - Vierjahn, Thomas T1 - Verbesserte kamerabasierte Bilderkennung für interaktive Installationen und Spiele N2 - Für moderne interaktive Anwendungen wird es immer wichtiger, einen Benutzer durch zusätzlichen Ballast so wenig wie möglich einzuschränken. Daher bietet sich eine kamerabasierte Interaktionserkennung an. Viele existierende Verfahren benötigen dazu aber einen weitestgehend statischen Hintergrund. In der gegebenen Anwendung allerdings befindet sich im Sichtbereich der Kameras eine Projektion bewegter Inhalte, mit denen ein Benutzer interagieren kann. Im Rahmen dieser Arbeit sollte ein bestehendes, auf Infrarotlicht basierendes System verbessert werden, das sich bisher als beleuchtungsabhängig erwiesen hat. Dazu wurden zunächst mehrere Verfahren zur Trennung von Vorder- und Hintergrund auf ihre Tauglichkeit untersucht. Das favorisierte Verfahren sollte anschließend durch stereoskopische Bildaufnahme - und damit tiefenbasierte Trennung - so verbessert werden, dass der bewegte Hintergrund sicher unterdrückt wird. Dies erwies sich für die gewünschten Anwendungen zwar als nicht praktikabel, dennoch wurden mögliche andere Anwendungsbereiche gefunden. Auch die Untersuchung der einzelnen Trennungsverfahren lieferte ein Ergebnis, das - mit weiteren Tests - zur Verbesserung der bestehenden Installation beitragen kann. N2 - Modern interactive environments are tending to not impose any restrictions by additional encumbrance on the user. Therefore it seems reasonable to utilize computer vision for detecting interactions. There are many techniques available to segment an image into fore- and background, but most of them require the scene to be static. In contrast this work applies to installations where an interactive projection is in the field of vision of a camera. Within the bounds of this work an existing technique utilizing infra-red light, which has been shown to be illumination-variant, was to be improved. First several techniques for foreground-background-segmentation were checked for suitability. The most appropriate was to be refined by adding depth segmentation to suppress the animated background utilizing stereo-vision. This turned out to be impractical for the given installations, but more practicable ones were found. In addition to this even the favoured segmentationtechnique may provide an improvement on the existing one. T2 - Improved camera-based recognition-techniques for interactive enviroments and games KW - computervision KW - shader KW - Stereobildverarbeitung KW - optische Erkennung KW - computervision KW - shader KW - stereo-vision KW - optical recognition KW - Background separation KW - FHD KW - Diplomarbeit KW - M Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-3777 CY - Düsseldorf ER - TY - CHAP A1 - Hatebur, Denis A1 - Heisel, Maritta A1 - Schmidt, Holger T1 - A Security Engineering Process based on Patterns T2 - 18th International Workshop on Database and Expert Systems Applications (DEXA 2007) N2 - We present a security engineering process based on security problem frames and concretized security problem frames. Both kinds of frames constitute patterns for analyzing security problems and associated solution approaches. They are arranged in a pattern system that makes dependencies between them explicit. We describe step-by-step how the pattern system can be used to analyze a given security problem and how solution approaches can be found. Further, we introduce a new frame that focuses on the privacy requirement anonymity. KW - security engineering process KW - pattern system KW - data privacy KW - software development Y1 - 2007 UR - https://ieeexplore.ieee.org/abstract/document/4312991 SN - 978-0-7695-2932-5 U6 - https://doi.org/10.1109/DEXA.2007.36 N1 - Sie haben Zugriff auf den Volltext innerhalb des HSD Campus. SP - 734 EP - 738 PB - IEEE CY - Regensburg ER - TY - CHAP A1 - Dahm, Markus T1 - MP3ergo - Usability of MP3 players T2 - proc. 10th intl conf Humans and Computers, Duesseldorf N2 - Listening to music played by small MP3-players is almost as ubiquituous as talking over mobile phones. In this paper we analyse interaction elements and usabilty of current MP3-players. To determine the usability, an empirical study based on a website that presented three simulated MP3-players was performed with over 1000 participants. The results show that, despite most marketing claims, some interaction devices are not as intuitive and really suitable for the task as they schould be. Also we found some surprising results concerning erroneous usage of navigation keys. KW - MP3 KW - usability Y1 - 2007 SP - 123 EP - 128 CY - Düsseldorf ER - TY - CHAP A1 - Garbe, Katharina A1 - Herbst, Iris A1 - Herder, Jens T1 - Spatial Audio for Augmented Reality T2 - 10th International Conference on Human and Computer N2 - Using spatial audio successfully for augmented reality (AR) applications is a challenge, but is awarded with an improved user experience. Thus, we have extended the AR/VR framework \sc Morgan with spatial audio to improve users orientation in an AR application. In this paper, we investigate the users’ capability to localize and memorize spatial sounds (registered with virtual or real objects). We discuss two scenarios. In the first scenario, the user localizes only sound sources and in the second scenario the user memorizes the location of audio-visual objects. Our results reflect spatial audio performance within the application domain and show which technology pitfalls still exist. Finally, we provide design recommendations for spatial audio AR environments. KW - spatial audio KW - augmented reality KW - sound interaction KW - FHD KW - VSVR Y1 - 2007 SP - 53 EP - 58 CY - Düsseldorf, Aizu-Wakamatsu ER -