@article{StantchevTamm2012, author = {Stantchev, Vladimir and Tamm, Gerrit}, title = {Reducing Information Asymmetry in Cloud Marketplaces}, series = {International Journal of Human Capital and Information Technology Professionals}, volume = {3}, journal = {International Journal of Human Capital and Information Technology Professionals}, number = {4}, pages = {1 -- 11}, year = {2012}, abstract = {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.}, language = {en} } @inproceedings{OpazoBasaezGhulamAriasArandaetal.2014, author = {Opazo Basaez, Marco and Ghulam, Sarfaraz and Arias Aranda, Daniel and Stantchev, Vladimir}, title = {Smart healthcare services: a patient oriented cloud computing solution}, pages = {18}, year = {2014}, abstract = {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.}, language = {en} } @inproceedings{TammWuensche2003, author = {Tamm, Gerrit and W{\"u}nsche, Maria}, title = {Strategies to reduce information asymmetry in Web Service Market}, series = {Proceedings of the Eleventh European Conference on Information Systems}, booktitle = {Proceedings of the Eleventh European Conference on Information Systems}, editor = {Ciborra, C. U. and Mercurio, R. and de Marco, M. and Martinez, M. and Carignani, A.}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-7034}, pages = {1898 -- 1912}, year = {2003}, abstract = {The web service model provides fundamental advantages compared to the classical software usage model. But transactions in the web service market have by far not reached the expected level. A reason for the tendency of market failure is the verifiable information asymmetry and uncertainty in the web service market. Besides deficiencies on the supply side, regarding configuration, display and communication of web service bundles, the limited web service knowledge of potential buyers are constitutional causes to the modest development and enforcement of the web service model. By the help of strategies derived from information economics the present study elaborates measures to take in order to prevent the market for web based services from failing. The conclusions of an online-based questioning experiment offer strategic recommendations to reduce buyer's uncertainty in outsourcing decision. Results of the experiment point out the significant positive impact to reduce information asymmetry and transaction uncertainty in the web service market by integrating information substitutes in the web service bundle in order to transform experience and credence qualities into search qualities. It can be verified that web service customers have a higher willingness to pay when information substitutes are integrated into the web service bundle.}, language = {en} } @inproceedings{TammGuenther2000, author = {Tamm, Gerrit and G{\"u}nther, Oliver}, title = {Business Models for ASP Marketplaces}, series = {Proceedings of the Eighth European Conference on Information Systems}, booktitle = {Proceedings of the Eighth European Conference on Information Systems}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-7046}, pages = {968 -- 975}, year = {2000}, abstract = {Abstract: ASP (Application Server Provider) marketplaces provide a fundamental alternative to the classical business model of software licensing. At this point, it is still unclear why and when customers prefer the ASP model over more traditional approaches. To make ASP more attractive, more knowledge about possible pricing and product strategies is needed. In this paper we describe different business models for ASP marketplaces. We first compare the cost structures of the classical licensing model with the new server-based approach. Then we illustrate how price and product differentiation may improve overall market efficiency. In particular, we show that by selling different software versions for different prices, ASP marketplaces may obtain near-optimal revenues with products that are relatively inexpensive, disaggregated, and customizable. Consumers can thus choose between a wide variety of product lines to fit their differing budgets and requirements.}, language = {en} } @article{GerkeTamm2008, author = {Gerke, Kerstin and Tamm, Gerrit}, title = {Process mining and data aggregation strategies for business collaboration networks}, series = {Journal Communications of Arab Computer Society}, volume = {1}, journal = {Journal Communications of Arab Computer Society}, number = {1}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-6490}, pages = {10}, year = {2008}, abstract = {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.}, language = {en} } @article{TammPetruchBennemann2008, author = {Tamm, Gerrit and Petruch, Konstantin and Bennemann, Michael}, title = {SaaS - Software as a Service: Herausforderungen f{\"u}r IT-Abteilungen}, series = {Journal IM Information Management}, volume = {23}, journal = {Journal IM Information Management}, number = {4}, pages = {12 -- 18}, year = {2008}, abstract = {Das SaaS-Gesch{\"a}ftsmodell stellt IT-Abteilungen vor neue Herausforderungen und M{\"o}glichkeiten. IT-Abteilungen sind gefordert SaaS-Angebote in bestehende IT-Landschaften zu integrieren. Zudem k{\"o}nnen IT-Abteilungen selbst SaaS-Angebot bereitstellen und sich damit einen neuen Markt unternehmensintern und unternehmens{\"u}bergreifend erschließen. GobiT und ITIL k{\"o}nnen f{\"u}r die Steuerung des SaaS-Lieferanten- und Kundenbeziehungsmanagement und f{\"u}r die SaaS-Produktion sinnvoll eingesetzt werden.}, language = {de} } @article{GuentherTammLeymann2007, author = {G{\"u}nther, Oliver and Tamm, Gerrit and Leymann, Frank}, title = {Pricing web services}, series = {International Journal of Business Process Integration and Management (IJBPIM)}, volume = {2}, journal = {International Journal of Business Process Integration and Management (IJBPIM)}, number = {2}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-6511}, pages = {132 -- 140}, year = {2007}, abstract = {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.}, language = {en} } @article{GuentherTammHansenetal.2001, author = {G{\"u}nther, Oliver and Tamm, Gerrit and Hansen, Lars and Meseg, Thomas}, title = {Application Service Providers: Angebot, Nachfrage und langfristige Perspektiven}, series = {Fachzeitschrift Wirtschaftsinformatik}, volume = {43}, journal = {Fachzeitschrift Wirtschaftsinformatik}, number = {6}, pages = {555 -- 567}, year = {2001}, abstract = {Netzbasierte Dienste, im englischen Sprachraum als Web-based Services oder Hosted Services bekannt, gewinnen zunehmend an Popularit{\"a}t. Zahlreiche Softwareanbieter pr{\"a}sentieren 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 Erg{\"a}nzung neben das klassische Lizenzmodell treten. W{\"a}hrend junge Firmen (wie z. B. Salesforce.com) ihr Gl{\"u}ck als reiner ASP versuchen, w{\"a}hlen etablierte Anbieter im Regelfall die zuletzt genannte Option SAP mit seinem ASP-Produkt mySAP.com ist hierf{\"u}r eines der bekannteren Beispiele.}, language = {de} } @inproceedings{GerkePetruchTamm2010, author = {Gerke, Kerstin and Petruch, Konstantin and Tamm, Gerrit}, title = {Optimization of Service Delivery through Continual Process Improvement: a Case Study}, series = {40. Jahrestagung der Gesellschaft f{\"u}r Informatik e.V. (GI), Leipzig}, booktitle = {40. Jahrestagung der Gesellschaft f{\"u}r Informatik e.V. (GI), Leipzig}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-6537}, year = {2010}, abstract = {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.}, language = {en} } @inproceedings{StantchevTamm2010, author = {Stantchev, Vladimir and Tamm, Gerrit}, title = {SOA Governance for the Internet of Services}, series = {18th Biennial Conference of the International Telecommunications Society, Tokio}, booktitle = {18th Biennial Conference of the International Telecommunications Society, Tokio}, year = {2010}, abstract = {Keine Angabe No details}, language = {en} } @inproceedings{GerkeTamm2009, author = {Gerke, Kerstin and Tamm, Gerrit}, title = {Continuous Quality Improvement of IT Processes based on Reference Models and Process Mining}, series = {15th Americas Conference on Information Systems (AMCIS'09), San Francisco}, booktitle = {15th Americas Conference on Information Systems (AMCIS'09), San Francisco}, year = {2009}, abstract = {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.}, language = {en} } @inproceedings{SchlegelTamm2009, author = {Schlegel, Martin and Tamm, Gerrit}, title = {Online Service Quality of Web-based E-Mail-Services: an Empirical Study for The German Market}, series = {42th Hawaii International Conference on System Science (HICSS-42), Hawaii}, booktitle = {42th Hawaii International Conference on System Science (HICSS-42), Hawaii}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-6566}, pages = {1 -- 10}, year = {2009}, abstract = {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.}, language = {en} } @inproceedings{WinklerKorolevaTamm2009, author = {Winkler, Till J. and Koroleva, Ksenia and Tamm, Gerrit}, title = {Wireless City Initiatives in Europe: towards a Service-Oriented Approach}, series = {2009 Conference on Techniques and Applications for Mobile Commerce, M{\´e}rida (Spain)}, booktitle = {2009 Conference on Techniques and Applications for Mobile Commerce, M{\´e}rida (Spain)}, pages = {36 -- 47}, year = {2009}, abstract = {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.}, language = {en} } @article{StantchevColomoPalaciosSotoAcostaetal.2014, author = {Stantchev, Vladimir and Colomo-Palacios, Ricardo and Soto Acosta, Pedro and Misra, Sanjay}, title = {Learning management systems and cloud file hosting services: a study on students' acceptance}, series = {Computers in Human Behavior}, volume = {31}, journal = {Computers in Human Behavior}, pages = {612 -- 619}, year = {2014}, abstract = {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.}, language = {en} } @inproceedings{HamannTammKaempfer2013, author = {Hamann, Lisa and Tamm, Gerrit and K{\"a}mpfer, Sascha}, title = {Analysis and comparison of existing maturity models for business processes}, series = {IADIS e-Society 2013 Conference, Lisbon}, booktitle = {IADIS e-Society 2013 Conference, Lisbon}, year = {2013}, abstract = {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.}, language = {en} } @book{TammTribowski2010, author = {Tamm, Gerrit and Tribowski, Christoph}, title = {RFID}, publisher = {Springer}, address = {Berlin}, isbn = {978-3-642-11459-5}, publisher = {SRH Berlin University of Applied Sciences}, pages = {XV, 144}, year = {2010}, abstract = {RFID bietet Unternehmen eine Vielzahl von Vorteilen im Bereich der Automatisierung und Prozesstransparenz. Gleichzeitig stellt die Technologie die Unternehmen vor technische, organisatorische, {\"o}konomische, rechtliche und sozio{\"o}konomische Herausforderungen. In diesem Buch werden die grundlegenden Funktionen der RFID-Technologie und L{\"o}sungskonzepte zur Integration in die betrieblichen Informationssysteme vorgestellt. Insbesondere die Standards des Internet der Dinge' werden maßgeblich den Erfolg der RFID-Technologie beeinflussen. F{\"u}r die RFID-Einf{\"u}hrung in Unternehmen wird in diesem Buch ein methodisch fundiertes Vorgehensmodell pr{\"a}sentiert. Die w{\"a}hrend des Vorgehensmodells eingesetzten Entscheidungsmethoden zur Potential- und Wirtschaftlichkeitsanalyse werden ausf{\"u}hrlich beschrieben und es wird auf unterst{\"u}tzende Softwarewerkzeuge verwiesen.}, language = {de} } @book{TammGuenther2005, author = {Tamm, Gerrit and G{\"u}nther, Oliver}, title = {Webbasierte Dienste: Technologien, M{\"a}rkte und Gesch{\"a}ftsmodelle}, publisher = {Physica-Verlag}, address = {Heidelberg}, isbn = {3-7908-1566-7}, publisher = {SRH Berlin University of Applied Sciences}, pages = {XVII, 258}, year = {2005}, abstract = {Dienstbasierte Architekturen bilden zunehmend eine attraktive Erg{\"a}nzung zu den klassischen Gesch{\"a}ftsmodellen der Softwarenutzung. Das Buch erl{\"a}utert die f{\"u}r webbasierte Dienste relevanten technischen und {\"o}konomischen Konzepte. Anschließend werden unter Zuhilfenahme von empirischen Analysen und Experimenten aktuelle Markttrends und Marktprozesse beschrieben. Dabei gehen die Autoren auch auf die aus dem Konsumg{\"u}terbereich bekannten Vertrauensprobleme und Informationsasymmetrien ein und er{\"o}rtern deren Konsequenzen f{\"u}r den Entwurf von erfolgreichen Gesch{\"a}ftsmodellen und M{\"a}rkten. Einschl{\"a}gige Fallstudien erg{\"a}nzen die Darstellung.}, language = {de} } @inproceedings{IbachTammHorbank2005, author = {Ibach, Peter and Tamm, Gerrit and Horbank, Matthias}, title = {Dynamic Value Webs in Mobile Environments Using Adaptive Location-Based Services}, series = {38th Hawaii International Conference on System Sciences (HICSS-38 2005), Hawaii}, booktitle = {38th Hawaii International Conference on System Sciences (HICSS-38 2005), Hawaii}, year = {2005}, abstract = {Web Services appear promising to facilitate interoperability and enable Dynamic Value Webs - the on-demand aggregation of services even across enterprise boundaries. However, past experiences have shown interoperability limitations in practice mainly due to information asymmetries on the Web Services markets. This Paper describes a service-oriented architecture for building Dynamic Value Webs in mobile environments using adaptive Location-Based Services. Our concept addresses the following three predominant difficulties: (1) service adaptivity to changing conditions in mobile environments, (2) interoperability including higher levels of semantics, and (3) assuring trustworthiness to all affected parties.}, language = {en} } @inproceedings{HochsteinTammBrenner2005, author = {Hochstein, Axel and Tamm, Gerrit and Brenner, Walter}, title = {Service-oriented IT-Management: benefit, Cost and Success Factors}, series = {13th European Conference on Information Systems (ECIS 2005), Regensburg}, booktitle = {13th European Conference on Information Systems (ECIS 2005), Regensburg}, year = {2005}, abstract = {Due to an enhanced customer focus in the planning, development and delivery of IT services, service-oriented IT management has become increasingly important. This paper investigates to what effect service-oriented IT management has already been put into place in European companies. Benefit and cost categories of integrating service-oriented principles into IT management processes are analyzed. Additionally success factors for implementing serviceoriented IT management are investigated. For this purpose, six case studies were conducted. The situation of IT management before and after implementation was analyzed and comments are made on the corresponding transformation projects. Based on the case studies, this paper shows three typical benefit categories of service-oriented IT management. Eight cost categories for implementing and operating service-oriented IT management processes are discussed and six success factors of pertinent re-organization projects are identified. Findings can serve as guidelines for other IT organizations and can be used as enabler for getting informed decisions regarding the initiation of service-oriented IT management. Finally, the article highlights four current trends for service-oriented IT management and further research is outlined.}, language = {en} } @inproceedings{TammZarnekow2005, author = {Tamm, Gerrit and Zarnekow, R{\"u}diger}, title = {Umsetzung eines ITIL-konformen IT-Service-Support auf der Grundlage von Web-Services}, series = {7. Internationale Tagung Wirtschaftsinformatik, Bamberg}, booktitle = {7. Internationale Tagung Wirtschaftsinformatik, Bamberg}, year = {2005}, abstract = {Die Umsetzung von IT-Service-Support-Prozessen auf der Basis des Referenzmodells IT Infrastructure Library (ITIL) geschieht in vielen Unternehmen derzeit mit hoher Priorit{\"a}t. Obwohl zur Unterst{\"u}tzung der Support-Prozesse eine Vielzahl von Softwarel{\"o}sungen zur Verf{\"u}gung stehen, basieren diese heute nicht auf Service-orientierten-Architekturen. Die Vorteile einer Service-orientierten-Architektur werden daher im Rahmen des IT-Service-Supports nicht genutzt. Der Beitrag zeigt am Beispiel eines zentralen ITIL-Support-Prozesses, dem Incident-Management, wie dieser technisch auf der Basis von Web-Services umgesetzt werden kann. Die Grundlage bilden sechs Fallstudien, in denen die Gestaltung ITIL-basierter Support-Prozesse untersucht wurde. Aufbauend auf den Fallstudien wird ein generischer Incident-Management-Prozess definiert und mit Hilfe von Web-Services umgesetzt. Dabei kommen sowohl atomare als auch aggregierte Web-Services zum Einsatz. F{\"u}r ein konkretes Service-Anliegen wird der Prozessablauf grafisch beschrieben. Die Umsetzung erfolgt exemplarisch unter Zuhilfenahme der Web Services Description Language (WSDL).}, language = {de} } @article{TammBrennerGrueneich2005, author = {Tamm, Gerrit and Brenner, Walter and Gr{\"u}neich, Armin}, title = {Business-Service-Management: Kulturwandel in der IT-Branche}, series = {Thexis: Fachzeitschrift f{\"u}r Marketing}, volume = {22}, journal = {Thexis: Fachzeitschrift f{\"u}r Marketing}, number = {2}, pages = {35 -- 40}, year = {2005}, abstract = {Keine Angabe No details}, language = {de} } @inproceedings{GhulamSchubertTammetal.2014, author = {Ghulam, Sarfaraz and Schubert, Johannes and Tamm, Gerrit and Stantchev, Vladimir}, title = {Integrating Smart Items and Cloud Computing in Healthcare Scenarios}, pages = {7}, year = {2014}, abstract = {Use of cloud computing in healthcare is a promising trend, particularly in utilization of smart items. Access, affordability and quality to proper healthcare is a great challenge in world society. With the utilization of smart sensors, there are possibilities to improve the quality of healthcare services whenever needed. Hence, such smart items services lead to economic advantages for the whole healthcare system. Keeping in mind these opportunities as well as challenges such as security or legal issues, it is important to bring healthcare and IT together. As a result, healthcare business processes need to be modeled in order to provide IT solutions tailored for practice-oriented applications. In this paper, we present a three-level architecture for a smart healthcare infrastructure. Our approach is based on recent literature work and results from conducted expert interviews with healthcare specialists and IT professionals. To demonstrate the applicability of this architecture model, we provide an example use-case as a template for any kind of smart sensor-based healthcare infrastructure.}, language = {en} } @article{StantchevRadantColomoPalacios2016, author = {Stantchev, Vladimir and Radant, Olaf and Colomo-Palacios, Ricardo}, title = {Assessment of Continuing Educational Measures in Software Engineering: a View from the Industry}, series = {International Journal of Engineering Education}, volume = {32}, journal = {International Journal of Engineering Education}, number = {2B}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-10606}, pages = {905 -- 914}, year = {2016}, abstract = {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.}, language = {en} } @article{ColomoPalaciosGarciaPenalvoStantchevetal.2016, author = {Colomo-Palacios, Ricardo and Garc{\´i}a-Pe{\~n}alvo, Francisco Jos{\´e} and Stantchev, Vladimir and Misra, Sanjay}, title = {Towards a social and context-aware mobile recommendation system for tourism}, series = {Pervasive and Mobile Computing}, volume = {38}, journal = {Pervasive and Mobile Computing}, number = {2}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, pages = {505 -- 515}, year = {2016}, abstract = {Loyalty in tourism is one of the main concerns for tourist organizations and researchers alike. Recently, technology in general and CRM and social networks in particular have been identified as important enablers for loyalty in tourism. This paper presents POST-VIA 360, a platform devoted to support the whole life-cycle of tourism loyalty after the first visit. The system is designed to collect data from the initial visit by means of pervasive approaches. Once data is analysed, POST-VIA 360 produces accurate after visit data and, once returned, is able to offer relevant recommendations based on positioning and bio-inspired recommender systems. To validate the system, a case study comparing recommendations from the POST-VIA 360 and a group of experts was conducted. Results show that the accuracy of system's recommendations is remarkable compared to previous efforts in the field.}, language = {en} } @article{RadantColomoPalaciosStantchev2016, author = {Radant, Olaf and Colomo-Palacios, Ricardo and Stantchev, Vladimir}, title = {Factors for the Management of Scarce Human Resources and Highly Skilled Employees in IT-Departments: a Systematic Review}, series = {Journal of Information Technology Research}, volume = {9}, journal = {Journal of Information Technology Research}, number = {1}, pages = {65 -- 82}, year = {2016}, abstract = {Due to an unsatisfying demographic development in most European states, companies have to solve a trade-off between a needed increase of productivity on the one hand and fewer highly skilled employees on the other hand. In this paper, authors propose factors for different layers of a framework to manage scarce resources in IT-departments. These layers aim for different relevant dimensions of employee satisfaction like wages, psychological development of employees and work life balance. Authors present a structured literature review to screen relevant publications on the topic. This paper offers white range of different factors regarding the management of labour shortage and highly skilled employees in companies which can be used to build a holistic model or framework to solve the challenges of the upcoming demographic change in Europe. Although the topic is quite popular in scientific literature, there is not a study devoted to identify these factors in organizational contexts. This paper is aimed to bridge this gap.}, language = {en} } @inproceedings{PrietoGonzalezTammStantchev2016, author = {Prieto-Gonz{\´a}lez, Lisardo and Tamm, Gerrit and Stantchev, Vladimir}, title = {Towards a Software Engineering Approach for Cloud and IoT Services in Healthcare}, series = {Computational Science and Its Applications}, booktitle = {Computational Science and Its Applications}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-42089-9}, pages = {439 -- 452}, year = {2016}, abstract = {In this work a tailored approach for requirements engineering for risk management solutions is presented. The approach focuses on cross-disciplinary risk paradigms in inpatient healthcare and aims to provide a novel methodology that accounts for specific viewpoints of relevant expert groups. The presented results demonstrate the feasibility and usefulness of the approach in the context of the current evaluation within the German market.}, language = {en} } @inproceedings{HaufeColomoPalaciosDzombetaetal.2016, author = {Haufe, Knut and Colomo-Palacios, Ricardo and Dzombeta, Srdan and Brandis, Knud and Stantchev, Vladimir}, title = {Security Management Standards: A Mapping}, series = {Procedia Computer Science}, booktitle = {Procedia Computer Science}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-10513}, pages = {755 -- 761}, year = {2016}, abstract = {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.}, language = {en} } @inproceedings{HaufeColomoPalaciosDzombetaetal.2016, author = {Haufe, Knut and Colomo-Palacios, Ricardo and Dzombeta, Srdan and Brandis, Knud and Stantchev, Vladimir}, title = {ISMS core processes: a study}, series = {Procedia Computer Science}, volume = {100}, booktitle = {Procedia Computer Science}, pages = {339 -- 346}, year = {2016}, abstract = {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 their mission. Actually a specific ISMS process framework which clearly differentiates between ISMS processes and security measures controlled by ISMS-processes does not exist. ISMS processes itself are not focused in current research. This article will fill this research gap while containing the results of a study to identify criteria for ISMS core processes as well as to identify relevant ISMS core processes.}, language = {en} } @misc{Todorova2015, type = {Master Thesis}, author = {Todorova, Janet}, title = {The Tech Startup Ecosystems in Berlin and Sofia: Alternative Scenarios for Collaboration}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-12087}, school = {SRH Berlin University of Applied Sciences}, pages = {88}, year = {2015}, abstract = {Today tech entrepreneurship is a driving force for Europe's economic growth. However, Europe is lagging behind the US economy, where startup ecosystems are thriving for decades, such as the Silicon Valley. One reason for that is that Europe comprises of many small markets, each with different legislation and language, which creates barriers for local startups to scale fast. The European startup ecosystem is very fragmented and in order to be competitive on the global markets, collaboration between different startup cities is necessary to develop. The purpose of this study is to explore the collaboration between the two tech startup ecosystems in Berlin (Germany) and Sofia (Bulgaria). The approach is to measure and analyse the current collaboration of entrepreneurs and investors from both ecosystems by collecting quantitative data about their collaboration behaviour. Data is collected via an online survey among participants from both ecosystems. Then, the data is used to identify which pairs of actors are most likely to become the catalysts of collaboration in the next 5 years. Based on that, three alternative scenarios for the future collaboration between Berlin and Sofia are designed. Scenario 1 assumes the collaboration between entrepreneurs from both ecosystems will grow fast and stimulate the collaboration between other actors from Berlin and Sofia. Scenario 2 identifies there is an established collaborative relationship between investors from Berlin and investors from Sofia. Based on that, the prediction is that in the long term many co-investments will occur, and this will generally encourage other actors from the two cities to collaborate. Scenario 3 is based on the assumption that Sofia will position itself as a seed-stage startup hub. The low cost of living and low competition for seed capital can eventually attract Berlin entrepreneurs to collaborate more with Sofia investors.}, language = {en} }