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 - 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 - 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 - 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 - Ghulam, Sarfaraz A1 - Schubert, Johannes A1 - Tamm, Gerrit A1 - Stantchev, Vladimir T1 - Integrating Smart Items and Cloud Computing in Healthcare Scenarios N2 - 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. KW - Healthcare KW - Smart Items KW - Cloud Computing Y1 - 2014 N1 - Online: https://www.researchgate.net/publication/284430113_Integrating_Smart_Items_and_Cloud_Computing_in_Healthcare_Scenarios 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 - Cloud Computing KW - Crowdsourcing KW - Collaborative Learning KW - Artificial Immune System Y1 - 2015 N1 - Volltext ist aus urheberrechtlichen Gründen nicht verfügbar. Full text due to copyright not available. VL - 51 IS - B SP - 762 EP - 770 ER - TY - JOUR A1 - Glasberg, Ronald A1 - Hartmann, Michael A1 - Draheim, Michael A1 - Tamm, Gerrit A1 - Hessel, Franz T1 - Risks and Crises for Healthcare Providers: the Impact of Cloud Computing JF - The Scientific World Journal N2 - We analyze risks and crises for healthcare providers and discuss the impact of cloud computing in such scenarios. The analysis is conducted in a holistic way, taking into account organizational and human aspects, clinical, IT-related, and utilities-related risks as well as incorporating the view of the overall risk management. KW - Healthcare KW - Cloud Computing Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0298-opus4-9695 ER -