TY - JOUR A1 - Stantchev, Vladimir A1 - Tamm, Gerrit A1 - Ullrich, Sebastian T1 - Marktplätze in der Cloud: Application Stores für mobile und webbasierte Dienste JF - ISIS Cloud und SaaS Report 2011 N2 - Cloud-Computing, insbesondere „Software as a Service (SaaS)“ und „Platform as a Service (PaaS)“ ist zugleich Herausforderung und Chance für IT-Anwender. Marktplatz-Ansätze aus der Welt der mobilen Applikationen (App Stores) können eine Grundlage für die Vermarktung von Software-Diensten darstellen. Ihre Konzepte lassen sich jedoch nur durch eine erweiterte Betrachtung von funktionalen und nicht-funktionalen Aspekten der webbasierten Dienste in die Welt des Cloud Computing übertragen. Application Stores und Marktplätze für webbasierte Dienste (z.B. Asperado, Cloud-Portal, Software-Marktplatz) helfen bei Identifizierung und Bewertung der Angebote und bei der Kommunikation mit potentiellen Kunden. KW - Cloud-Computing KW - Marktplatz KW - SaaS KW - PaaS Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-689 SP - 99 EP - 101 ER - TY - CHAP A1 - Brüning, Stefan A1 - Zapotoczky, Johannes A1 - Ibach, Peter A1 - Stantchev, Vladimir T1 - Cooperative Positioning with MagicMap T2 - Workshop on Positioning, Navigation and Communication 2007 (WPNC'07) N2 - We present MagicMap, a cooperative, hybrid positioning system developed at the Humboldt-University in Berlin. While most other positioning systems are limited to specific scenarios and technologies our system provides means to incorporate any available wireless networking technology. Currently, MagicMap supports WLAN, RFID, and ZigBee as wireless technologies for positioning and Linux, Windows, and Windows CE as platforms. Position calculation and exchange is based on a cooperative approach allowing an open internet community to share the required data. KW - Cooperative KW - Hybrid KW - Indoor KW - Positioning Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-695 ER - TY - CHAP A1 - Stantchev, Vladimir A1 - Tamm, Gerrit T1 - Towards Ambient Intelligence and the Internet of Services in Healthcare N2 - The emergence of the Internet of Services and the Internet of Devices opens new possibilities for societal computung scenarios. Ambient Intelligence (AmI) is a vision of an environment that puts the needs of the user in the center of the technological design process. An AmI environment consists of ubiquitous distributed devices such as sensors, displays, data memories which are embedded in everyday objects like walls, clothes, tables or the pavement. These devices are interconnected and seamlessly deliver applications and services to the user. AmI emphasizes the intelligence of the environments interfaces and the intelligence that can be achieved by correlating context information from different data sources. In this work we present an approach to transfer the AmI vision to the public services sector using the paradigm of service orientation and Cloud Computing. Based on scenarios in the healthcare sector the benefits and challenges of such transfer are presented. KW - Internet of Services KW - Internet of Devices KW - Ambient Intelligence KW - Public Services KW - Health Care Y1 - 2010 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-727 ER - TY - JOUR A1 - Ibach, Peter A1 - Milanovich, Nikola A1 - Richling, Jan A1 - Stantchev, Vladimir A1 - Wiesner, Andre A1 - Malek, Miroslaw T1 - CERO: CE RObots Community JF - IEE Proceedings Software N2 - We describe our experience creating a robots community using standard hardware and software - the Windows CE operating system, XScale development boards, and LEGO Mindstorm actuators. We focus on an open and extendable distributed robotics system, which in contrast to most existing proprietary robotics systems, supports cost-effective integration and assembly of components while providing dependable communication and coordination. To demonstrate feasibility we have developed the CERO Framework for ad hoc cooperation in robots communities employing a service-oriented architecture with the main building blocks: ad hoc networking for different wireless technologies (e.g., Bluetooth, WLAN, or 433 MHz radio communication), a protocol for interconnecting development board and actuators, and a CE.NET based software framework supporting complex movements, consensus protocols, cooperation, and positioning. It offers high-level interfaces for programming complex tasks in cooperative robotics. We also present an overview of intended applications. KW - CERO KW - Robotics Systems KW - Robots Communities Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-733 VL - 152 IS - 5 SP - 210 EP - 214 ER - TY - CHAP A1 - Werner, Matthias A1 - Richling, Jan A1 - Milanovic, Nikola A1 - Stantchev, Vladimir T1 - Composability Concept for Dependable Embedded Systems T2 - Proceedings of the International Workshop on Dependable Embedded Systems at the 22nd Symposium on Reliable Distributed Systems (SRDS 2003) N2 - Composability is a sought after property. However, whereas there is usually an intuitive understanding of this concept, a clear definition has been frequently missing. In this paper, we refine our concept of composability given in. We see composability as a property of an architecture not of systems. In addition, we do not want to reduce composability to the functional specification; rather, we are focusing on how composability effects the nonfunctional properties, especially the composed system's real-time behavior, its reliability, its security, etc. We see the advantage of our approach in having a wide application domain. It works for functional and non-functional properties, it may consider both, hardware and software, and it allows for a description of composition anomalies. In this paper, we show how to apply our concept to an embedded hardware-software co-designed architecture and to composition and decomposition of dependable services in embedded environments. KW - Embedded Systems KW - Composability Concept KW - Composability Y1 - 2003 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-747 ER - TY - CHAP A1 - Stantchev, Vladimir T1 - Service-based Systems in Clinical Environments T2 - Information Service Design Symposium 2008 N2 - In this report we present an architectural approach to add quality-of-service (QoS) assurance and location awareness to service-based systems within existing clinical infrastructures. To address typical design requirements of such systems (e.g., cooperating services, performance and availability) the work proposes a service-oriented architecture (SOA) as architectural concept and architectural translucency to provide stable QoS. We evaluate position sensing systems, QoS assurance approaches and present design principles for service-based health care applications. Furthermore, we present a clinical application scenario and an architectural approach to integrate existing infrastructure into a human centric assistance system. KW - Public Services KW - Quality of Service KW - Health Care KW - Location Awareness Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-759 ER - TY - CHAP A1 - Schubert, Johannes A1 - Mautsch, Erik A1 - Stantchev, Vladimir A1 - Tamm, Gerrit T1 - Rechtliche Rahmenbedingungen für die Datenerhebung durch AAL-Infrastruktur bei der Pflege N2 - Bei der Datenerhebung und -verarbeitung durch AAL-Infrastruktur im Pflegesektor sind rechtliche Rahmenbedingungen zu prüfen, die die Nutzung der Messdaten juristisch zulässig machen. Hierzu wurden die in der praxisnahen Pflegeliteratur dargestellten Rechtsnormen zusammengefasst und kategorisiert. Somit ließ sich ermitteln, welche Daten als schützenswert zu definieren und mit welchen Sicherungsmaßnahmen zu versehen sind. Auf dieser Basis kann ein Ansatz präsentiert werden, der eine rechtlich unbedenkliche Absicherung aller technischen Elemente bei der Implementierung einer AAL-Infrastruktur in der Pflege ermöglicht. N2 - For collecting and processing data with AAL infrastructure in the nursing sector, there are legal rules to examine to build a legal framework for the usage of these measured data. Therefore, we consolidated and categorized legal norms presented in the practical orientated nursing literature. Consequently, we identify which data can be defined as worth protecting and which measures of protection are possible for them. On this basis, we present an approach for a legally safe usage of every kind of technical elements within the implementation of AAL infrastructure in the nursing sector. KW - AAL KW - Datenschutz KW - Smart Items Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-2607 ER - TY - JOUR A1 - Stantchev, Vladimir T1 - Wissen und Technologieaffinität: Herausforderungen bei der Realisierung eines ambienten Ver- und Entsorgungssystems für die Immobilien des Landes Berlin N2 - Berlin ist eine der großen europäischen Hauptstädte mit einem breiten Angebot an öffentlichen Dienstleistungen (Public Services). 2003 hat der Berliner Senat den „Landesbetrieb für Gebäudebewirtschaftung" (LfG) gegründet, der die Facility Management Aktivitäten des Landes bündelt. Seit 2005 wird zusammen mit der TU Berlin der Einsatz innovativer Informations-technologien (IT) in diesem Bereich konsequent erweitert. Die Kombination aus einer unauffälligen (unobtrusiven) IT-Infrastruktur und einer flächendeckenden und kontextbezogenen Einsetzbarkeit wird oft als ambient bezeichnet und stellt sehr spezifische Anforderungen an die Gestaltung der Mensch-Maschine-Interaktionen. In diesem Beitrag wird die Gestaltung eines Systems für die Ver- und Entsorgung als Teil der Facility Management Aufgaben beschrieben. Ausgehend von der Beschreibung unseres Vorgehensmodells zur Erhebung der Ist-Prozesse und Usability Evaluation, werden in einem zweiten Schritt Nutzerprofile erstellt und die Ist-Prozesse um diese erweitert. Die zweite Hälfte des Beitrags beschreibt das eingeführte, ambiente Ver- und Entsorgungssystem, zusammen mit einigen Interaktionsszenarien. Abschließend erfolgt eine Evaluierung der Wirtschaftlichkeit und der Usability des Systems. N2 - Berlin is one of the major European capitals with a broad range of public services. In 2003 the „Landesbetrieb für Gebäudebewirtschaftung" (LFG) was established by the Berlin Senate, which bundles the facility management activities of the country. Since 2005 the use of innovative information technologies (IT) within this range are consistently expanded together with the TU Berlin. The combination of an inconspicuous (unobtrusive) IT infrastructure and a surface-covering and contextual applicability is often designated as ambient and makes very specific demands for the design of human-machine interactions. In this article the design of a system for the maintenance and disposal is described as a part of facility management tasks. Based on the description of our process model for the collection of the actual processes and usability evaluation, in a second step user profiles are provided and the actual processes by these are extended. The second half of the article describes the imported, ambient maintenance and disposal system, together with some interaction scenarios. Finally, an evaluation of the efficiency and usability of the system occurs. KW - Innovative Informationstechnologien KW - Mensch-Maschine-Interaktion KW - Serviceorientierte Architektur KW - Usability Evaluation KW - Ambiente Systeme Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-2645 SP - 335 EP - 338 ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Barnawi, Ahmed A1 - Ghulam, Sarfaraz A1 - Schubert, Johannes A1 - Tamm, Gerrit T1 - Smart Items, Fog and Cloud Computing as Enablers of Servitization in Healthcare JF - Sensors & Transducers N2 - In this article we argue that smart items and cloud computing can be powerful enablers of servitization as business trend. This is exemplified by an application scenario in healthcare that was developed in the context of the OpSIT-Project in Germany. We present a three-level architecture for a smart healthcare infrastructure. The approach is based on a service-oriented architecture and extends established architectural approaches developed previously at our group. More specifically, it integrates a role model, a layered cloud computing architecture, as well as a fog-computing-informed paradigm in order to provide a viable architecture for healthcare and elderly-care applications. The integration of established paradigms is beneficial with respect to providing adequate quality of service and governance (e.g., data privacy and compliance). It has been verified by expert interviews with healthcare specialists and IT professionals. To further demonstrate the validity of this architectural model, we provide an example use-case as a template for any kind of smart sensor-based healthcare infrastructure. KW - Sensors KW - Smart items KW - Cloud computing KW - Fog computing KW - Servitization Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-7184 VL - 185 IS - 2 SP - 121 EP - 128 ER - TY - JOUR A1 - Álvarez-Rodríguez, Jose María A1 - Colomo-Palacios, Ricardo A1 - Stantchev, Vladimir T1 - Skillrank: towards a Hybrid Method to Assess Quality and Confidence of Professional Skills in Social Networks JF - Scientific Programming N2 - The present paper introduces a hybrid technique to measure the expertise of users by analyzing their profiles and activities in social networks. Currently, both job seekers and talent hunters are looking for new and innovative techniques to filter jobs and candidates where candidates are trying to improve and make their profiles more attractive. In this sense, the Skillrank approach is based on the conjunction of existing and well-known information and expertise retrieval techniques that perfectly fit the existing web and social media environment to deliver an intelligent component to integrate the user context in the analysis of skills confidence. A major outcome of this approach is that it actually takes advantage of existing data and information available on the web to perform both a ranked list of experts in a field and a confidence value for every professional skill. Thus, expertise and experts can be detected, verified, and ranked using a suited trust metric. An experiment to validate the Skillrank technique based on precision and recall metrics is also presented using two different datasets: (1) ad hoc created using real data from a professional social network and (2) real data extracted from the LinkedIn API. Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-7264 ER - TY - JOUR A1 - Schermuly, Carsten C. A1 - Draheim, Michael A1 - Glasberg, Ronald A1 - Stantchev, Vladimir A1 - Tamm, Gerrit A1 - Hartmann, Michael A1 - Hessel, Franz T1 - Human resource crises in German hospitals: an explorative study JF - Human Resources for Health N2 - The complexity of providing medical care in a high-tech environment with a highly specialized, limited labour force makes hospitals more crisis-prone than other industries. An effective defence against crises is only possible if the organizational resilience and the capacity to handle crises become part of the hospitals’ organizational culture. To become more resilient to crises, a raised awareness — especially in the area of human resource (HR) — is necessary. The aim of this paper is to contribute to the process robustness against crises through the identification and evaluation of relevant HR crises and their causations in hospitals. Qualitative and quantitative methods were combined to identify and evaluate crises in hospitals in the HR sector. A structured workshop with experts was conducted to identify HR crises and their descriptions, as well as causes and consequences for patients and hospitals. To evaluate the findings, an online survey was carried out to rate the occurrence (past, future) and dangerousness of each crisis. Six HR crises were identified in this study: staff shortages, acute loss of personnel following a pandemic, damage to reputation, insufficient communication during restructuring, bullying, and misuse of drugs. The highest occurrence probability in the future was seen in staff shortages, followed by acute loss of personnel following a pandemic. Staff shortages, damage to reputation, and acute loss of personnel following a pandemic were seen as the most dangerous crises. The study concludes that coping with HR crises in hospitals is existential for hospitals and requires increased awareness. The six HR crises identified occurred regularly in German hospitals in the past, and their occurrence probability for the future was rated as high. KW - Crises Management KW - Hospital Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-7288 VL - 40 IS - 13 ER - TY - JOUR A1 - Dzombeta, Srdan A1 - Stantchev, Vladimir A1 - Colomo-Palacios, Ricardo A1 - Brandis, Knud A1 - Haufe, Knut T1 - Governance of Cloud Computing Services for the Life Sciences JF - IT Professional N2 - This analysis of the legal regulations for cloud computing in healthcare is based on the authors’ expertise in cloud-based data processing for healthcare and life sciences organizations. The proposed implementation roadmap should help organizations govern health data processing and storage. Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-5908 VL - 16 IS - 4 SP - 2 EP - 9 ER - TY - CHAP A1 - Haufe, Knut A1 - Colomo-Palacios, Ricardo A1 - Dzombeta, Srdan A1 - Brandis, Knud A1 - Stantchev, Vladimir T1 - Security Management Standards: A Mapping T2 - Procedia Computer Science N2 - Adjustment and cost-effectiveness are key elements of a successful Information Security Management System (ISMS). ISMS-Processes, as basic elements of every ISMS, need to be aligned to the organization and its mission. As of today, a specific ISMS process framework does not exist. ISMS processes are not in focus of current research. This article aims to fill this research gap by presenting results of a process mapping study regarding ISMS processes in the most important and widely accepted international standards for Information Security Management. Authors propose a set of ISMS processes within an ISMS process framework which should be implemented at an individually appropriate maturity level. KW - IT Governance KW - Information Security KW - Mapping Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-10513 SP - 755 EP - 761 ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Radant, Olaf A1 - Colomo-Palacios, Ricardo T1 - Assessment of Continuing Educational Measures in Software Engineering: a View from the Industry JF - International Journal of Engineering Education N2 - In a field like Software Engineering, highly dependent on knowledge, continuing education is key to warrantee business sustainability. In this scenario, relying on continuing educational measures is crucial to support organizations in their competence management programs. In order to validate a set of measures, in this paper an interview study regarding continuing education measures is reported. The study was carried out in late 2014, early 2015 with some of the most experienced SE professionals from the consulting company BearingPoint. Study findings suggest an increasing relevance of such educational measures. Furthermore, authors provide insights about relevant educational measures, improvement areas in employees’ training, commonly experienced problems, as well as instruments for control and evaluation. KW - Software Engineering KW - Business sustainability KW - Competence management Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-10606 VL - 32 IS - 2B SP - 905 EP - 914 ER -