TY - JOUR A1 - Stantchev, Vladimir A1 - Dzombeta, Srdan A1 - Brandis, Knud T1 - IT Compliance Management in the Field of Cloud Computing: competence Management Approach supporting Continuing Engineering Education JF - International Journal of Engineering Education N2 - Keine Angabe - No details KW - IT Compliance Management KW - Cloud Computing Y1 - 2013 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. VL - 29 SP - Keine Angabe - No details EP - Keine Angabe - No details ER - TY - CHAP A1 - Pittke, Fabian A1 - Leopold, Henrik A1 - Mendling, Jan A1 - Tamm, Gerrit T1 - Enabling Reuse of Process Models through the Detection of Similar Process Parts T2 - Business Process Management Workshops N2 - Many companies use business process modeling to support various improvements initiatives leading to an increasing number of process models. Typically, these models are stored in a collection containing several hundreds of process models. In many cases, process models are overlapping, although parts could be easily reused saving costs and efforts. Different labeling styles and evolving process models complicate the detec- tion of reusable model parts. In this paper, we propose a novel approach for the detection of equivalent and similar process model parts that ex- ploits semantic comparison of activity labels and behavioral comparison of control flow. We evaluate our approach on the SAP Reference Model, a collection with 604 process models. The evaluation reveals insights for the thresholds of semantic and behavioral similarity of process models as well as their influence for similar process part detection. Hence, we identify five candidate groups with specific similarity properties that contain reoccurring process parts. KW - Business Process Modeling KW - Similar Process Part Detection KW - Semantic Similarity KW - Behavioral Similarity Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-40 SN - 978-3-642-36284-2 SP - 586 EP - 597 PB - Springer CY - Berlin ER - 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 - Price, Michael A1 - Tamm, Gerrit A1 - Stantchev, Vladimir T1 - SaaS Marketplaces - visions from theory and experience from practice T2 - Proceedings of the 19th Biennial Conference of the International Telecommunications Society (ITS2012), Bangkok N2 - Cloud computing, especially Software-as-a-Service (SaaS), changes the IT processes of companies for application deployment, access, usage, maintenance, governance and management. In an age of Bring-Your-Own-Device, small businesses through to globally operating companies increasingly support their employees and customers with SaaS-applications that allow access to internal and external business information. Whether employees are in the office, at a client facility, at home or on the road, they need fast, easy access to business applications with any type of device. SaaS offers companies an interesting alternative to classical on-premise IT solutions. Cloud computing provides innovative applications, high connectivity and performance, cost reduction, flexibility and fast time to market with a minimum of effort. Cloud computing is a special form of outsourcing that has its roots in the fifties. Ten years ago similar concepts to cloud computing e.g. Application Service Providing (ASP) appeared and failed. But it seems that the willingness to use cloud computing is now much higher and the cost pressure effects of the financial crisis also motivate decision makers in companies to focus on cloud computing. This contribution presents the results of actual scientific literature investigations alongside interviews with owners of Software-as-a-Service Marketplaces. It describes several types of SaaS marketplaces using different business models to bring together customers and providers. It shows that SaaS marketplaces are two-sided and demonstrates how platforms are emerging that bundle features into significant value propositions for both sides. This work is relevant to firms who seek business solution recommendations beyond the focus of their on-premise-focussed advisors. It is also relevant for owners and potential owners of SaaS marketplaces and SaaS providers exploring alternatives in their distribution mix. KW - SaaS KW - Marketplace KW - Cloud Computing KW - Two-Sided Market Y1 - 2012 N1 - Online: https://www.econstor.eu/bitstream/10419/72513/1/742586251.pdf 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 - 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 - CHAP A1 - Mejia, F. A1 - Glasberg, Ronald A1 - Tamm, Gerrit A1 - Lopez, Gabriel J. T1 - Readiness Level to adopt Smart Grid Technologies: Study for the City of Medellin N2 - The smart grid development in Latin America shows a big gap in the amount of research and development when compared with the USA and EU where the topic has been active for almost 10 years. In this context two different models and expert surveys are used in this study to evaluate the readiness level of the city of Medellin to adopt smart grid technologies. The results of this study show that the City has the utilities, the knowledge, the universities and the human resource to become a role model in the region. But an effort to integrate all the actors and impulse a common agenda is required. The utility companies need to lead this development, but regulators, academia and industry must back up this endeavor and enable Medellin to lead the power grid development of the next years in the region. KW - Power Distribution KW - Power Grids KW - Power System Economics KW - Power System Planning KW - Smart Grids Y1 - 2011 SN - 978-1-4577-1802-1 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. ER - TY - CHAP A1 - Stantchev, Vladimir A1 - Stantcheva, Lubomira T1 - Applying IT-Governance Frameworks for SOA and Cloud Governance T2 - Communications in Computer and Information Science N2 - Service-oriented architecture (SOA) in the enterprise was one of the key enablers for cloud computing. Therefore, it can serve as a natural fit for bringing traditional IT governance approaches forward to the challenges of cloud governance. In this work we present an approach for mapping IT governance mindsets to the aspects of SOA governance. It allows an IT organisation the adaptation and the continuous usage of already established governance models during the adoption of cloud computing solutions. We also present an application case study where we demonstrate the feasibility of the approach in real-life scenarios in the context of an international telecommunication provider. T3 - Communications in Computer and Information Science - 278/1 KW - Collaborative Learning KW - Intelligent Tutoring Systems KW - Social Network Analysis Y1 - 2012 N1 - Online: https://www.researchgate.net/publication/280080082_Applying_IT-Governance_Frameworks_for_SOA_and_Cloud_Governance SP - 398 EP - 407 ER - TY - CHAP A1 - Stantchev, Vladimir A1 - Tamm, Gerrit A1 - Petruch, Konstantin ED - Lytras, Miltiadis D. T1 - Simulation-Based IT Process Governance T2 - Communications in Computer and Information Science N2 - IT departments within enterprises often utilize incident management and ticketing systems. While performance data from such systems is often stored in logfiles it is rarely evaluated extensively. In this work we assess the applicability of an approach for extended evaluation of logged data from such systems. Our evaluation is focused on Key Performance Indicators (KPIs) and aims to discover more in-depth insights as compared to typical data visualization and dashboard techniques. We also present a practical case study where we demonstrate the feasibility of the approach using real-life logfiles from an international telecommunication provider. Our modeling methodology is based on the approach of System Dynamics. T3 - Communications in Computer and Information Science - 278/2 KW - Simulation KW - IT Processes KW - IT Governance KW - Incident Management Y1 - 2012 N1 - Online: https://www.researchgate.net/publication/286454680_Simulation-based_IT_process_governance VL - 278 SP - 206 EP - 215 PB - Springer CY - Berlin ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Tamm, Gerrit A1 - Petruch, Konstantin T1 - Assessing and governing IT-staff behavior by performance-based simulation JF - Computers in Human Behavior N2 - When optimizing IT operations organizations typically aim to optimize resource usage. In general, there are two kinds of IT resources - IT infrastructures and IT staff. An optimized utilization of these resources requires both quantitative and qualitative analysis. While IT infrastructures can offer raw data for such analyses, data about IT staff often requires additional preparation and augmentation. One source for IT staff-related data can be provided by incident management and ticketing systems. While performance data from such systems is often stored in logfiles it is rarely evaluated extensively. In this article we propose the usage of such data sources for IT staff behavior evaluation and also present the relevant augmentation techniques. We claim that our approach is able to provide more in-depth insights as compared to typical data visualization and dashboard techniques. Our modeling methodology is based on the approach of system dynamics. We also provide formal models and simulation results where we demonstrate the feasibility of the approach using real-life logfiles from an international telecommunication provider. KW - Governance KW - IT-Staff KW - Simulation KW - Human Aspect KW - System Dynamics Y1 - 2012 N1 - Online: https://www.researchgate.net/publication/257252766_Assessing_and_governing_IT-staff_behavior_by_performance-based_simulation VL - 29 IS - 2 SP - 473 EP - 485 ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Tamm, Gerrit T1 - Reducing Information Asymmetry in Cloud Marketplaces JF - International Journal of Human Capital and Information Technology Professionals (IJHCITP) N2 - Cloud Computing is emerging as a predominant paradigm for obtaining and providing computing functionality in the enterprise. Organizations that are planning to use cloud computing offerings struggle with the question “How do I choose the right offering?” Cloud offerings exhibit a variety of pricing models and different levels of service and functionality. In this article the authors define first Cloud Computing in the context of IT Governance. Then they set criteria to compare different offerings at the level of Software-as-a-Service (SaaS). This is an important precondition for the reduction of the verifiable information asymmetry and uncertainty in the cloud market. Besides deficiencies on the supply side, regarding configuration, display and communication of service bundles, the limited knowledge of potential buyers is main reason for the modest adoption. The authors apply strategies derived from information economics to reduce this asymmetry by integrating information substitutes in the service marketplace description, thereby transforming experience and credence qualities into search qualities. KW - Cloud Computing KW - Cloud Marketplaces Y1 - 2012 N1 - Online: https://www.researchgate.net/publication/262206518_Reducing_Information_Asymmetry_in_Cloud_Marketplaces VL - 3 IS - 4 SP - 1 EP - 10 ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Malek, Miroslaw T1 - Addressing Dependability throughout the SOA Life Cycle JF - IEEE Transactions on Services Computing N2 - Dependability should be considered throughout the phases of the SOA life cycle. This article proposes the application of a service level management approach to address dependability and presents dependability-related activities for every stage (Model, Assemble, Deploy, and Manage) of the SOA life cycle. Furthermore, we describe the concepts and the formalisms that are behind these activities. Following these activities service providers and aggregators can offer optimized levels of dependability from their existing services and thus better meet user requirements. KW - SOA Life Cycle KW - Service Level Management KW - Software Dependability Y1 - 2011 N1 - Online: https://www.researchgate.net/publication/220595087_Addressing_Dependability_throughout_the_SOA_Life_Cycle VL - 4 IS - 2 SP - 85 EP - 95 ER - TY - JOUR A1 - Petruch, Konstantin A1 - Tamm, Gerrit A1 - Stantchev, Vladimir T1 - Deriving In-Depth Knowledge from IT-Performance Data Simulations JF - International Journal of Knowledge Society Research (IJKSR) N2 - Knowledge of behavioral patterns of a system can contribute to an optimized management and governance of the same system, or of similar systems. While human experience often manifests itself as intuition, intuition can be notoriously misleading, particularly in the case of quantitative data and subtle relations between different data sets. This article augments managerial intuition with knowledge derived from a specific byproduct of automated transaction processing performance and log data of the processing software. More specifically, the authors consider data generated by incident management and ticketing systems within IT support departments. The authors’ approach utilizes a rigorous analysis methodology based on System Dynamics. This allows for identifying real causalities and hidden dependencies between different datasets. The authors can then use them to derive and assemble knowledge bases for improved management and governance in this context. This approach is able to provide more in depth insights as compared to typical data visualization and dashboard techniques. In the experimental results section, the authors demonstrate the feasibility of the approach. It is applied on real life datasets and log files from an international telecommunication provider and considered different improvements in management and governance that result from it. KW - Cloud Governance KW - IT Governance KW - Knowledge Extension KW - Simulation KW - System Dynamics Y1 - 2012 N1 - Online: https://www.researchgate.net/publication/276183994_Deriving_In-Depth_Knowledge_from_IT-Performance_Data_Simulations VL - 3 IS - 2 SP - 13 EP - 29 ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Stantcheva, Lubomira T1 - Extending Traditional IT-Governance Knowledge Towards SOA and Cloud Governance JF - International Journal of Knowledge Society Research N2 - Enterprises today often strive to keep up with the paces of technological development. A particular case in point is the IT function where traditional governance approaches are often questioned by technology trends. Examples for such trends in the last ten years are the service-oriented architecture (SOA) and cloud computing. The introduction of SOA in the enterprise was one of the key enablers for cloud computing. Therefore, it can serve as a natural fit for bringing traditional IT governance approaches forward to the challenges of cloud governance. This article presents an approach for extending IT governance mindsets to the areas of SOA and cloud governance. It allows an IT organisation the adaptation and the continuous usage of already established governance knowledge and models during the adoption of cloud computing solutions. The authors also present an application case study where they demonstrate the feasibility of the approach in real-life scenarios in the context of an international telecommunication provider. KW - Cloud Governance KW - IT Governance KW - Knowledge Extension KW - SOA Governance KW - Technological Development Y1 - 2012 N1 - Online: https://www.researchgate.net/publication/269560351_Extending_Traditional_IT-Governance_Knowledge_Towards_SOA_and_Cloud_Governance VL - 3 IS - 2 SP - 30 EP - 43 ER - TY - JOUR A1 - Petruch, Konstantin A1 - Stantchev, Vladimir A1 - Tamm, Gerrit T1 - A Survey on IT-Governance Aspects of Cloud Computing JF - International Journal of Web and Grid Services N2 - The purpose of this work is to provide a representative survey of current trends in the perception, assessment and adoption of cloud computing within the enterprise. Cloud computing can be regarded as the general principle for using and providing web and grid services. First, we provide a meta-study, where we evaluate existing and published empirical studies. Furthermore, we conduct and evaluate an own empirical study with a representative group of European and International enterprises. Key findings of the work include the significantly higher importance of Business Drivers for the adoption of cloud computing, as compared to Technical Drivers. KW - IT Governance KW - Cloud Computing KW - Web Services Management KW - Information Technology KW - Business Drivers Y1 - 2011 N1 - Online: https://www.researchgate.net/publication/220403226_A_survey_on_IT-governance_aspects_of_cloud_computing VL - 7 IS - 3 SP - 268 EP - 303 ER - TY - CHAP A1 - Stantchev, Vladimir A1 - Tamm, Gerrit T1 - Addressing Non-Functional Properties of Services in IT Service Management T2 - Non-Functional Properties in Service Oriented Architecture: Requirements, Models and Methods N2 - A key point that remains to be addressed is the assurance of service levels for end-user applications that rely on these provider models. This chapter describes an approach for addressing non-functional properties (NFPs) of services in service-oriented architectures (SOA). The approach is based on reference models such as the IT Infrastructure Library (ITIL) and the SOA life cycle model. It has been applied in several industrial settings in the telecommunications sector. KW - Non-Functional Properties KW - IT Service KW - Service-Oriented Architecture Y1 - 2011 N1 - Online: https://www.researchgate.net/publication/286454960_Addressing_Non-Functional_Properties_of_Services_in_IT_Service_Management SP - 324 EP - 334 PB - IGI Global CY - Hershey ER - TY - CHAP A1 - Bochenek, Adam A1 - Tamm, Gerrit ED - Sieck, Jürgen T1 - Social Media Marketing Services for Mobile Applications T2 - Wireless Communication and Information: Radio Engineering and Multimedia Applications N2 - Keine Angabe No details KW - Wireless Communication KW - Mobile Applications KW - Social Media Marketing Y1 - 2009 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. SP - 185 EP - 202 PB - Verlag Werner Hülsbusch CY - Boizenburg ER - TY - BOOK A1 - Ulrich, Peter A1 - Tamm, Gerrit T1 - Corporate- und Webinterface Design für ein Online-Unternehmen: Analyse, Konzeption und Realisierung am Beispiel des Online-Jobportals absolvent.de N2 - Absolvent.de ist ein seit 1998 bestehendes Online-Jobportal, welches sich auf die Vermittlung von Jobs und Praktika für Hochschulabsolventen spezialisiert hat. Im Zuge eines bevorstehenden Relaunchs sollen neben den Funktionalitäten und eingesetzten Technologien auch das Corporate Design und das Webinterface Design erneuert werden. Die Entwicklung von Corporate Design und Webinterface Design für absolvent.de ist Gegenstand dieser Arbeit. Dazu werden im theoretischen Teil der Arbeit objektive Anforderungen und Funktionen des Corporate Designs und des Webinterface Designs genannt und erläutert. Im praktischen Teil werden am Beispiel des Online-Jobportals absolvent.de systematische Methoden für die Entwicklung eines den Anforderungen entsprechenden Corporate- und Webinterface Designs aufgezeigt und angewendet. Anhand des systematischen Vorgehens bei der Designentwicklung wird die schrittweise Verringerung der Komplexität der Aufgabenstellung deutlich und die entwickelten Ergebnisse werden plausibel und nachvollziehbar. Das Buch dient als Leitfaden bei der Entwicklung von Corporate Design und Webinterface Design und richtet sich somit an Grafik-, Web- und Interfacedesigner. KW - Webinterface Design KW - Webdesign KW - Corporate Design Y1 - 2008 SN - 978-3-639-04088-3 N1 - Buch verfügbar in der Bibliothek der SRH Hochschule Berlin, Signatur ST252 4. Book available in the library of SRH Hochschule Berlin, shelf mark ST252 4. PB - VDM Verlag Dr. Müller CY - Saarbrücken ER - TY - BOOK A1 - Hebig, Michael A1 - Tamm, Gerrit T1 - Web Mining: mit Kundenorientierung zum Geschäftserfolg N2 - Das Buch „Web Mining - mit Kundenorientierung zum Geschäftserfolg“ verschafft dem Leser einen Einblick in die Welt des Web Mining. In einem ersten Teil werden die Herkunft, der Prozess sowie die Grenzen des Web Mining detailiert erläutert. Anhand eines praktischen Beispiels kommen nachfolgend Web Mining Tools zum Einsatz. So wird aufgezeigt, wie mit Hilfe von Auswertungen der Nutzerdaten Optimierungspotentiale entdeckt und wie daraus Handlungsempfehlungen abgeleitet werden können. Durch Anpassen der Websites an die zuvor gewonnenen Nutzerbedürfnisse lässt sich der Erfolg der Internetpräsenz erhöhen. Es wird also veranschaulicht dargestellt, welche Möglichkeiten z.B. Online-Shop-Betreiber besitzen, um den Umsatz des Unternehmens zu steigern. KW - Web Mining KW - Internetauftritt Y1 - 2008 SN - 978-3-639-07933-3 N1 - Buch verfügbar in der Bibliothek der SRH Hochschule Berlin, Signatur ST530 1. Book available in the library of SRH Hochschule Berlin, shelf mark ST530 1. PB - VDM Verlag Dr. Müller CY - Saarbrücken ER - TY - CHAP A1 - Tamm, Gerrit A1 - Ullrich, Sebastian ED - Pop, Susa T1 - Agile Software Architecture for Interactive Media Facades T2 - Urban media cultures N2 - Keine Angabe No details KW - Agile Software Architecture KW - Interactive Media Facades Y1 - 2012 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. SP - 176 EP - 179 PB - avedition CY - Ludwigsburg ER - TY - CHAP A1 - Gerke, Kerstin A1 - Petruch, Konstantin A1 - Tamm, Gerrit ED - Praeg, Claus-Peter T1 - Continual Process Improvement Based on ITIL and Process Mining T2 - Quality Management for IT-Services N2 - The inherent quality of business processes and their support through information technology (IT) increasingly plays a significant role in the economic success of an organization. More and more business processes are supported through IT services. In order to provide IT services with the required quality and at minimum costs, the importance of effective and efficient IT service management (ITSM) processes is crucial. KW - Process Improvement KW - ITIL KW - Process Mining Y1 - 2010 N1 - Online: https://www.researchgate.net/publication/344158774_Continual_Process_Improvement_Based_on_ITIL_and_Process_Mining SP - 145 EP - 167 PB - IGI Global CY - Hershey ER - TY - CHAP A1 - Stantchev, Vladimir A1 - Tamm, Gerrit ED - Lytras, Miltiadis D. T1 - Managing Research Portfolios in the Knowledge Enterprise: a University Spin-Out Case Study T2 - Organizational, Business, and Technological Aspects of the Knowledge Society N2 - Purely knowledge-based activities are of an increasing importance for modern enterprises. Moreover, innovative companies are focusing entirely on such high-profile activities and outsourcing the supporting tasks. In this work we focus on university spin-outs as an example. Such companies often enjoy the provision of administrative infrastructure (e.g., accounting, facilities) within an ”incubator” area and can focus exclusively on innovation. The transfer of research ideas to the marketplace typically involves selection and targeted prioritization of these ideas. Project Portfolio Management (PPM) can be a viable framework for this prioritization. The necessary structuring of project ideas can be provided by a standardized process with defined functions (data repository, project assessment, selection, reporting, and portfolio reevaluation). While PPM is generally regarded as beneficial for large organizations, we show that similar benefits can be expected within innovative SMEs. In this work we discuss such benefits and related knowledge and learning strategies. T3 - Communications in Computer and Information Science - 112 KW - Research Portfolios KW - Knowledge Enterprise Y1 - 2010 N1 - Online: https://www.researchgate.net/publication/221003006_Managing_Research_Portfolios_in_the_Knowledge_Enterprise_A_University_Spin-Out_Case_Study SP - 418 EP - 423 PB - Springer CY - Berlin ER - TY - CHAP A1 - Ibach, Peter K. A1 - Malek, Miroslaw A1 - Tamm, Gerrit ED - Hilton, Brian N. T1 - Towards a Global Real-Time Enterprise T2 - Emerging Spatial Information Systems and Applications N2 - Frictionless interoperation of business processes even across enterprise boundaries, complete up-to-date view of the overall status, and full remote control over the business parameters for individuals in charge – this is the holy grail of a “global real-time enterprise”. Yet a vision, a number of enabling technologies brought us closer to accomplishing the challenges: Sensing the position of mobile objects and processes status, distributing the status information with “zero latency”, discovering it according to specific demands across organisation boundaries, providing and securing uniform service-oriented access to all kinds of entities ranging from smart items to business processes, and aggregating the overwhelming variety of elementary services to form high-value composite services. In this chapter, we overview the enabling technologies that drive the development and further discuss market factors, security and privacy concerns, and standardization processes that have to be considered. Then we propose our SEMALON approach – the SEMAntic LOcation Network – intended as a basic infrastructure for discovery and composition of location based services. Finally we describe our experiences from a case study implementation – the NOMADS Campus – which is a distributed spatial information system for our campus at Humboldt University Berlin. KW - Global Real-Time Enterprise Y1 - 2006 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. SP - 271 EP - 309 PB - Idea Group Publishing CY - Hershey ER - TY - CHAP A1 - Günther, Oliver A1 - Tamm, Gerrit ED - Scheuermann, Peter T1 - A Framework for ASP-Marketplaces T2 - Cooperative Information Systems N2 - For organizations that plan to use online software applications via Internet one of the most important questions is, ”How do you choose the right ASP for the companies corporate needs?”. ASP marketplaces offer a plurality of pricing models and different levels of service. From whole system and whole service to single applications and methods, every digital product and service can be provided through an ASP marketplace. There is a need for ASP marketplaces, which gives the user a transparent insight into the ASP market. In this paper we define Application Service Providing in the context of Outsourcing. Then we analyze relevant software classes for ASP marketplaces. Finally we will set criteria to compare different levels of service of ASP marketplace. This paper gives an overview of key characteristics ASP marketplace provider must take into account by preparing the business process in order to successfully deliver application services. T3 - Lecture Notes in Computer Science - 1901 KW - Database Management KW - User Interfaces and Human Computer Interaction KW - Computer Communication Networks KW - Information Storage and Retrieval KW - Artificial Intelligence Y1 - 2000 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. SP - 114 EP - 119 PB - Springer CY - Berlin ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Tamm, Gerrit T1 - Reducing Information Asymmetry in Cloud Marketplaces JF - International Journal of Human Capital and Information Technology Professionals N2 - Cloud Computing is emerging as a predominant paradigm for obtaining and providing computing functionality in the enterprise. Organizations that are planning to use cloud computing offerings struggle with the question “How do I choose the right offering?” Cloud offerings exhibit a variety of pricing models and different levels of service and functionality. In this article the authors define first Cloud Computing in the context of IT Governance. Then they set criteria to compare different offerings at the level of Software-as-a-Service (SaaS). This is an important precondition for the reduction of the verifiable information asymmetry and uncertainty in the cloud market. Besides deficiencies on the supply side, regarding configuration, display and communication of service bundles, the limited knowledge of potential buyers is main reason for the modest adoption. The authors apply strategies derived from information economics to reduce this asymmetry by integrating information substitutes in the service marketplace description, thereby transforming experience and credence qualities into search qualities. KW - Cloud Marketplaces KW - Cloud Computing KW - Information Asymmetry Y1 - 2012 N1 - Online: https://www.researchgate.net/publication/262206518_Reducing_Information_Asymmetry_in_Cloud_Marketplaces VL - 3 IS - 4 SP - 1 EP - 11 ER - TY - CHAP A1 - Opazo Basaez, Marco A1 - Ghulam, Sarfaraz A1 - Arias Aranda, Daniel A1 - Stantchev, Vladimir T1 - Smart healthcare services: a patient oriented cloud computing solution N2 - Objectives/rationale: Healthcare systems all over the world are facing difficult challenges that have a direct impact and influence the delivery of healthcare services. As a response healthcare institutions are relying in the implementation of Information and communication technologies (ICTs) to overcome difficulties and satisfy patients’ demands in a cost-effective way adopting new technologies capable to innovate, extend, and redefine the way healthcare has been delivered for decades. New technological innovations such as Internet of things (IoT), Smart item technology, and cloud computing can improve the traditional e-healthcare system and extend service provision beyond the hospital facilities by using wireless sensor networks (WSN) and radio frequency identification devices (RFID), providing a new type of services advertised as “smart.” This type of services, enable doctors to treat patients remotely and allows people to do their normal daily routines, occupations, and activities while receiving appropriate, timely, and high-quality ubiquitous healthcare services. Methods: An exploratory study is performed to review the route towards smart healthcare services, emphasizing the use of information and communication technologies (ICTs) and smart item technology as enhancers for smart healthcare services provision. Results/findings: A new technological infrastructure promises to transform medical practice and disease prevention by empowering healthcare institutions with smart items for remote patient monitoring eliminating time-wasting procedures, reducing health costs, improving quality of service and patients satisfaction. Implications/conclusions: Traditional e-healthcare system is transitioning into an interconnected smart-healthcare system potentiated by new technological advances capable to extend healthcare service provision and offer smart healthcare services. KW - Healthcare KW - Cloud Computing Y1 - 2014 N1 - Online: https://www.researchgate.net/publication/275274958_Smart_healthcare_services_a_patient_oriented_cloud_computing_solution ER - TY - JOUR A1 - Prieto-González, Lisardo A1 - Stantchev, Vladimir A1 - Colomo-Palacios, Ricardo T1 - Applications of ontologies in knowledge representation of human perception JF - International Journal of Metadata, Semantics and Ontologies N2 - Information overload is becoming bigger as internet grows. This entails several problems such as difficulty in finding information and redundancy of knowledge. In this paper, a solution of these problems is presented as a global representation of knowledge based on human perception, and modelled by means of ontologies. In this study we present the approach with several advantages as well as some drawbacks related to state of the art technologies. KW - human perception KW - knowledge representation KW - ontologies KW - modelling Y1 - 2014 N1 - Online: https://www.researchgate.net/publication/262247874_Applications_of_ontologies_in_knowledge_representation_of_human_perception SP - 74 EP - 80 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 - Stantchev, Vladimir A1 - Hoang, Trung Dang A1 - Schulz, Tino A1 - Ratchinski, Ilja T1 - Optimizing Clinical Processes with Position-Sensing JF - IT Professional N2 - The authors propose an optimization of clinical processes with position- sensing technologies and evaluate existing solutions and their applicability. KW - Healthcare IT KW - Surgery KW - Position Sensing KW - Process Optimization Y1 - 2008 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. VL - 10 IS - 2 SP - 31 EP - 37 ER - TY - JOUR A1 - Stantchev, Vladimir A1 - Prieto González, Lisardo A1 - Tamm, Gerrit T1 - Cloud computing service for knowledge assessment and studies recommendation in crowdsourcing and collaborative learning environments based on social network analysis JF - Computers in Human Behavior N2 - Interactions among people have substantially changed since the emergence of social networks, the expansion of the Internet and the proliferation of connected mobile devices, and so have the possibilities of collaborative learning, with the inclusion of new e-learning platforms. From this point, assessing human knowledge in these virtual environments is not a trivial task. This work presents a novel cloud-computing-based service which relies on advanced artificial intelligence mechanisms to infer knowledge and interest from users considering the aggregated data presented from/to these users in different social networks. This way it is possible to assess with a certain degree of confidence the user knowledge level in different topics as well as recommend additional specific education related to his/her former studies in order to get a better/desired job. KW - Collaborative learning KW - Social networks KW - e-learning KW - Knowledge representation model KW - Artificial Immune System KW - Big Data Y1 - 2014 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. VL - 51 SP - 762 EP - 770 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 - Gerke, Kerstin A1 - Tamm, Gerrit T1 - Qualitätsmanagement zur Steuerung von IT-Prozessen auf der Basis von Referenzmodellen und Process Mining JF - HMD Praxis der Wirtschaftsinformatik N2 - Die Qualität von Geschäftsprozessen entscheidet zunehmend über den wirtschaftlichen Erfolg eines Unternehmens. Die Geschäftsprozesse werden immer stärker durch IT-Prozesse unterstützt. Der Beitrag zeigt, wie die IT-Prozesse auf der Grundlage des Referenzmodells IT Infrastructure Library (ITIL) optimiert und mithilfe von Kennzahlen und Process Mining gesteuert werden können. Hierfür werden auf Basis der Referenzprozesse Sollprozesse bestimmt und Sollkennzahlen festgelegt. Die Istprozesse und deren Kennzahlen werden mithilfe von Process Mining ausgewertet und anschließend mit den Sollprozessen verglichen. Insgesamt können Verbesserungspotenziale identifiziert und Handlungsempfehlungen abgeleitet werden. Die Gestaltung und Steuerung ITIL-basierter Customer-Support-Prozesse werden anhand eines Praxisfalles aus einem Customer-Relationship-Management-System erprobt. Vorgehensmodell und Ergebnisse werden in diesem Beitrag vorgestellt. KW - Qualitätsmanagement KW - Geschäftsprozesse KW - Process Mining Y1 - 2009 N1 - Online: https://www.researchgate.net/publication/271817721_Qualitatsmanagement_zur_Steuerung_von_IT-Prozessen_auf_der_Basis_von_Referenzmodellen_und_Process_Mining VL - 46 IS - 2 SP - 43 EP - 51 ER - TY - JOUR A1 - Gerke, Kerstin A1 - Tamm, Gerrit T1 - Process mining and data aggregation strategies for business collaboration networks JF - Journal Communications of Arab Computer Society N2 - Business collaboration and information sharing becomes more and more important for companies, mainly driven by economics of scale and the strategic value of network knowledge. In this paper we will describe how process mining results will increase the willingness of cross company data aggregation and the usage of shared business collaboration infrastructures. The results of our contributions are based on process and data analyses in the customer relation management of a leading German passenger airline. As information sharing is considered a central challenge among supply chain partners, we describe the role of data aggregation as a requirement for process mining in collaborative infrastructures. Aggregating data on the one hand can preserve companies from compromising their local data. On the other hand valuable network information may get lost. We use process mining to derive collaborative business process models. Therefore, we evaluate the impact of data aggregation on the significance of process mining results. KW - Process Mining KW - Data Aggregation KW - Business Collaboration Networks Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-6490 VL - 1 IS - 1 ER - TY - JOUR A1 - Tamm, Gerrit A1 - Petruch, Konstantin A1 - Bennemann, Michael T1 - SaaS - Software as a Service: Herausforderungen für IT-Abteilungen JF - Journal IM Information Management N2 - Das SaaS-Geschäftsmodell stellt IT-Abteilungen vor neue Herausforderungen und Möglichkeiten. IT-Abteilungen sind gefordert SaaS-Angebote in bestehende IT-Landschaften zu integrieren. Zudem können IT-Abteilungen selbst SaaS-Angebot bereitstellen und sich damit einen neuen Markt unternehmensintern und unternehmensübergreifend erschließen. GobiT und ITIL können für die Steuerung des SaaS-Lieferanten- und Kundenbeziehungsmanagement und für die SaaS-Produktion sinnvoll eingesetzt werden. KW - Software as a Service (SaaS) KW - IT-Management KW - IT-Strategien KW - CobiT KW - ITIL Y1 - 2008 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Full text not available for copyright reasons. VL - 23 IS - 4 SP - 12 EP - 18 ER - TY - JOUR A1 - Günther, Oliver A1 - Tamm, Gerrit A1 - Leymann, Frank T1 - Pricing web services JF - International Journal of Business Process Integration and Management (IJBPIM) N2 - This paper focuses on the challenges associated with composing and pricing web services. We present the results of an online experiment, where subjects were confronted with a variety of choices and decisions relating to web service markets and service composition. Our analysis shows that people expect the price of a composite web service to be lower than the sum of the prices of the elementary services, that is, users are not willing to pay for aggregation by a third party. To obtain a viable business model for composite web services, non-standard pricing mechanisms, such as auctions and negotiations, possibly supported by electronic agents, have to be taken into consideration. Usage-based pricing schemes, combined with an option to switch to a flat subscription, seem most appropriate to penetrate the developing market for web services. KW - Web Services KW - Pricing KW - Service-oriented Architectures KW - SOAs KW - Web-Based Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-6511 VL - 2 IS - 2 SP - 132 EP - 140 ER - TY - JOUR A1 - Günther, Oliver A1 - Tamm, Gerrit A1 - Hansen, Lars A1 - Meseg, Thomas T1 - Application Service Providers: Angebot, Nachfrage und langfristige Perspektiven JF - Fachzeitschrift Wirtschaftsinformatik N2 - Netzbasierte Dienste, im englischen Sprachraum als Web-based Services oder Hosted Services bekannt, gewinnen zunehmend an Popularität. Zahlreiche Softwareanbieter präsentieren sich am Markt als Application Service Provider (ASP), d.h. als Anbieter netzbasierter Anwendungsdienste. Hierbei kann das ASP-Modell den einzigen Vertriebskanal darstellen (reiner ASP) oder aber als Ergänzung neben das klassische Lizenzmodell treten. Während junge Firmen (wie z. B. Salesforce.com) ihr Glück als reiner ASP versuchen, wählen etablierte Anbieter im Regelfall die zuletzt genannte Option SAP mit seinem ASP-Produkt mySAP.com ist hierfür eines der bekannteren Beispiele. KW - Web-based Services KW - Hosted Services KW - Application Service Provider (ASP) Y1 - 2001 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Full text due to copyright not available. VL - 43 IS - 6 SP - 555 EP - 567 ER - TY - CHAP A1 - Gerke, Kerstin A1 - Petruch, Konstantin A1 - Tamm, Gerrit T1 - Optimization of Service Delivery through Continual Process Improvement: a Case Study T2 - 40. Jahrestagung der Gesellschaft für Informatik e.V. (GI), Leipzig N2 - In order to deliver services of high quality in a cost-effective manner, processes and their support through information technology (IT) play an increasingly significant role. We present an approach, which allows optimizing the service delivery through continual process improvement. This approach combines the 7-step improvement process recommended by ITIL with process mining. On the basis of suggestions derived from process mining, performance indicators of different services are determined and subsequently compared as part of an internal benchmark. The approach, which will be trialed in practice, enables the optimization of service delivery certainly, but it is also concerned with the most effective utilization of limited resources in terms of people and tools. KW - Service Delivery KW - Process Improvement: KW - ITIL KW - Process Mining Y1 - 2010 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-6537 ER - TY - CHAP A1 - Stantchev, Vladimir A1 - Tamm, Gerrit T1 - SOA Governance for the Internet of Services T2 - 18th Biennial Conference of the International Telecommunications Society, Tokio N2 - Keine Angabe No details KW - Internet of Services KW - SOA Y1 - 2010 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. ER - TY - CHAP A1 - Gerke, Kerstin A1 - Tamm, Gerrit T1 - Continuous Quality Improvement of IT Processes based on Reference Models and Process Mining T2 - 15th Americas Conference on Information Systems (AMCIS'09), San Francisco N2 - The inherent quality of business processes increasingly plays a significant role in the economic success of an organization. More and more business processes are supported through IT processes. In this contribution, we present a new approach which allows the continuous quality improvement of IT processes by the interconnection of IT Infrastructure Library (ITIL) reference model and process mining. On the basis of the reference model, to-be processes are set and key indicators are determined. As-is processes and their key indicators derived by process mining are subsequently compared to the to-be processes. This new approach enables the design and control of ITIL based customer support processes which will be trialed in a practice case of a customer relationship management (CRM) system. The procedural models, as well as its results, are introduced in this publication. KW - Quality Improvement KW - IT Processes KW - Process Mining Y1 - 2009 N1 - Online: https://www.researchgate.net/publication/220893289_Continuous_Quality_Improvement_of_IT_Processes_based_on_Reference_Models_and_Process_Mining ER - TY - CHAP A1 - Schlegel, Martin A1 - Tamm, Gerrit T1 - Online Service Quality of Web-based E-Mail-Services: an Empirical Study for The German Market T2 - 42th Hawaii International Conference on System Science (HICSS-42), Hawaii N2 - E-mail services represent an essential part of the IT landscape of enterprises. Besides in-house hosting, every company can make use of offers from specialized Application Service Providers (ASPs). Former research has shown a lack of transparency in the market for web-based services. This paper summarizes the results of a study on professional web-based e-mail services catering to the German-speaking market. This research mainly addresses following questions: What are the similarities and differences between the various services in the market? To which extent do the offered services meet a corporation's requirements? What kind of methodology can be used to analyze and to compare web-based services? And, with that in mind, do web-based e-mail-services represent a serious alternative to in-house hosting of e-mail-services? To answer these questions we compared information of selected service providers on the basis of a multi-scenario utility analysis. KW - Online Service Quality KW - Web-Based E-Mail-Services KW - Empirical Study KW - Germany Y1 - 2009 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-6566 SP - 1 EP - 10 ER - TY - CHAP A1 - Winkler, Till J. A1 - Koroleva, Ksenia A1 - Tamm, Gerrit T1 - Wireless City Initiatives in Europe: towards a Service-Oriented Approach T2 - 2009 Conference on Techniques and Applications for Mobile Commerce, Mérida (Spain) N2 - The application of wireless technologies in urban areas is at the beginning of a transformation. While municipalities worldwide have invested in deploying wireless access infrastructures, the services which build up on these and add value for individuals and organizations are still at their early stage. Especially for European municipalities there is still a looming potential. This paper explores the current status of municipal wireless adoption in Europe based on the analysis of 25 initiatives in European metropolitan areas and derives a setup approach for wireless city initiatives which focuses on the definition and evaluation of innovative services. The approach includes overall design requirements, a generic stakeholder analysis as well as clusters for innovative wireless services and is illustrated by a case example of an ongoing wireless city project in Germany. KW - Wireless City KW - Europe Y1 - 2009 N1 - Online: https://www.researchgate.net/publication/221093811_Wireless_City_Initiatives_in_Europe_-_Towards_a_Service-Oriented_Approach SP - 36 EP - 47 ER - TY - JOUR A1 - Prieto-González, Lisardo A1 - Stantchev, Vladimir A1 - Colomo-Palacios, Ricardo T1 - Applications of ontologies in knowledge representation of human perception JF - International Journal of Metadata, Semantics and Ontologie N2 - Information overload is becoming bigger as internet grows. This entails several problems such as difficulty in finding information and redundancy of knowledge. In this paper, a solution of these problems is presented as a global representation of knowledge based on human perception, and modelled by means of ontologies. In this study we present the approach with several advantages as well as some drawbacks related to state of the art technologies. Y1 - 2014 N1 - Online: https://www.researchgate.net/publication/262247874_Applications_of_ontologies_in_knowledge_representation_of_human_perception VL - 9 IS - 1 SP - 74 EP - 80 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 - JOUR A1 - Stantchev, Vladimir A1 - Colomo-Palacios, Ricardo A1 - Soto Acosta, Pedro A1 - Misra, Sanjay T1 - Learning management systems and cloud file hosting services: a study on students’ acceptance JF - Computers in Human Behavior N2 - The aim of this paper is to investigate the motivations that lead higher education students to replace several Learning Management Systems (LMS) services with cloud file hosting services for information sharing and collaboration among them. The research approach is based on the Technology Acceptance Model (TAM). More specifically, the model is devoted to identifying barriers and enablers to the acceptance of these technologies. A questionnaire comprising three factors (Attitude toward using technology, Perceived ease of use and Perceived usefulness) was applied to a sample consisting of 121 higher education students. Results show that the perceived ease of use of cloud file hosting services is above that of LMS tools and services and that cloud file hosting services presented higher levels of perceived usefulness than standard learning management tools. In addition, attitude toward using cloud file hosting services is well above that of using LMS tools. KW - Learning Management Systems KW - Technology Acceptance Model KW - Attitude toward using Technology KW - Perceived Ease of Use KW - Perceived Usefulness Y1 - 2014 N1 - Online: https://www.researchgate.net/publication/261959989_Learning_management_systems_and_cloud_file_hosting_services_A_study_on_students'_acceptance VL - 31 SP - 612 EP - 619 ER - TY - CHAP A1 - Hamann, Lisa A1 - Tamm, Gerrit A1 - Kämpfer, Sascha T1 - Analysis and comparison of existing maturity models for business processes T2 - IADIS e-Society 2013 Conference, Lisbon N2 - The continuous optimization of business processes is becoming an increasingly important factor for a company’s long-term success. Maturity models for business processes aim at maintaining a distinct quality of processes and help to determine the maturity level of the processes and the company’s maturity. Previous research has shown the lack of transparency and standardization for maturity models. In particular, existing maturity models were not scientifically compared and evaluated among themselves. Uncertainty and unawareness in selection and application of adequate maturity models can be observed in applied science and practice. The aim of the scientific work was to evaluate existing business process maturity models in terms of strengths and weaknesses in order to provide a comprehensive and reliable knowledge-based on specific evaluation criteria setting. The conclusions have been used to take advantage of one of the pre-chosen models to measure the maturity of a business process. The examined models were CMMI, BPMM-OMG, PEMM and EDEN. The applied methodology consists of literature research, empirical findings and practical application. The empirical findings comprise a purpose-made questionnaire and an outcome weighted in terms of importance and / or appliance. A particular challenge of the research was to compare the different maturity models based on their criteria, scales and general scope. KW - Business Process Management (BPM) KW - Business Process Maturity Model (BPMM) KW - Capability Maturity Model Integration (CMMI) KW - European Foundation for Quality Management (EFQM) KW - Process and Enterprise Maturity Model (PEMM) Y1 - 2013 N1 - Online: http://www.cse.dmu.ac.uk/~fsiewe/papers/faisal_siewe_esociety_2013.pdf ER - TY - BOOK A1 - Tamm, Gerrit A1 - Tribowski, Christoph T1 - RFID N2 - RFID bietet Unternehmen eine Vielzahl von Vorteilen im Bereich der Automatisierung und Prozesstransparenz. Gleichzeitig stellt die Technologie die Unternehmen vor technische, organisatorische, ökonomische, rechtliche und sozioökonomische Herausforderungen. In diesem Buch werden die grundlegenden Funktionen der RFID-Technologie und Lösungskonzepte zur Integration in die betrieblichen Informationssysteme vorgestellt. Insbesondere die Standards des Internet der Dinge' werden maßgeblich den Erfolg der RFID-Technologie beeinflussen. Für die RFID-Einführung in Unternehmen wird in diesem Buch ein methodisch fundiertes Vorgehensmodell präsentiert. Die während des Vorgehensmodells eingesetzten Entscheidungsmethoden zur Potential- und Wirtschaftlichkeitsanalyse werden ausführlich beschrieben und es wird auf unterstützende Softwarewerkzeuge verwiesen. T3 - Informatik im Fokus - 0 KW - RFID Y1 - 2010 SN - 978-3-642-11459-5 N1 - Buch verfügbar in der Bibliothek der Berlin School of Management and Technology, Signatur ST177 1. Book available in the library of Berlin School of Management and Technology, shelf mark ST177 1. PB - Springer CY - Berlin ER - TY - BOOK A1 - Tamm, Gerrit A1 - Günther, Oliver T1 - Webbasierte Dienste: Technologien, Märkte und Geschäftsmodelle N2 - Dienstbasierte Architekturen bilden zunehmend eine attraktive Ergänzung zu den klassischen Geschäftsmodellen der Softwarenutzung. Das Buch erläutert die für webbasierte Dienste relevanten technischen und ökonomischen Konzepte. Anschließend werden unter Zuhilfenahme von empirischen Analysen und Experimenten aktuelle Markttrends und Marktprozesse beschrieben. Dabei gehen die Autoren auch auf die aus dem Konsumgüterbereich bekannten Vertrauensprobleme und Informationsasymmetrien ein und erörtern deren Konsequenzen für den Entwurf von erfolgreichen Geschäftsmodellen und Märkten. Einschlägige Fallstudien ergänzen die Darstellung. KW - Anwendungsdienstanbieter KW - Kosten-Nutzen-Analyse KW - Marktentwicklung KW - Transaktionskostenansatz KW - Nachfrageermittlung Y1 - 2005 SN - 3-7908-1566-7 N1 - Buch verfügbar in der Bibliothek der SRH Hochschule Berlin, Signatur QP650 33. Book available in the library of SRH Hochschule Berlin, shelf mark QP650 33. PB - Physica-Verlag CY - Heidelberg ER -