Time filter

Source Type

Petruch K.,Telekom Deutschland GmbH | Stantchev V.,FOM Hochschule fur Oekonomie und Management | Tamm G.,SRH University of Applied Sciences Berlin
International Journal of Web and Grid Services | Year: 2011

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. © 2011 Inderscience Enterprises Ltd.

Stantchev V.,SRH University of Applied Sciences Berlin | Petruch K.,Telekom Deutschland GmbH | Tamm G.,SRH University of Applied Sciences Berlin
Computers in Human Behavior | Year: 2012

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. © 2012 Elsevier Ltd. All rights reserved.

Gockel C.,University of Fribourg | Gockel C.,SRH University of Applied Sciences Berlin | Kolb P.M.,University of Stuttgart | Werth L.,University of Hohenheim
PLoS ONE | Year: 2014

Temperature-related words such as cold-blooded and hot-headed can be used to describe criminal behavior. Words associated with coldness describe premeditated behavior and words associated with heat describe impulsive behavior. Building on recent research about the close interplay between physical and interpersonal coldness and warmth, we examined in a lab experiment how ambient temperature within a comfort zone influences judgments of criminals. Participants in rooms with low temperature regarded criminals to be more cold-blooded than participants in rooms with high temperature. Specifically, they were more likely to attribute premeditated crimes, ascribed crimes resulting in higher degrees of penalty, and attributed more murders to criminals. Likewise, participants in rooms with high temperature regarded criminals to be more hot-headed than participants in rooms with low temperature: They were more likely to attribute impulsive crimes. Results imply that cognitive representations of temperature are closely related to representations of criminal behavior and attributions of intent. © 2014 Gockel et al.

Stantchev V.,SRH University of Applied Sciences Berlin | Colomo-Palacios R.,Charles III University of Madrid | Soto-Acosta P.,University of Murcia | Misra S.,Ankara University
Computers in Human Behavior | Year: 2014

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. © 2013 Elsevier Ltd. All rights reserved.

Pittke F.,Humboldt University of Berlin | Pittke F.,SRH University of Applied Sciences Berlin | Leopold H.,Humboldt University of Berlin | Mendling J.,WU Vienna
Lecture Notes in Business Information Processing | Year: 2013

Thinking in business processes and using process models for their documentation has become common practice in companies. In many cases this documentation encompasses more than thousands of models. One of the key challenges is achieving consistency of the process model terminology. Especially, the usage of synonym and homonym words is one of the most severe problems for terminological consistency. Therefore, this paper presents an automatic approach to identify synonym and homonym words in model repositories. We challenged the approach against three model collection from practice that are assumed to have different levels of terminological consistency. The evaluation shows that the approach is capable to fulfill these goals and to identify meaningful synonym and homonym candidates for follow-up resolution. © 2013 Springer-Verlag.

Prieto-Gonzalez L.,Charles III University of Madrid | Stantchev V.,SRH University of Applied Sciences Berlin | Colomo-Palacios R.,Charles III University of Madrid
International Journal of Metadata, Semantics and Ontologies | Year: 2014

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. Copyright © 2014 Inderscience Enterprises Ltd.

Porzsolt F.,University of Ulm | Clouth J.,Lilly Deutschland GmbH | Deutschmann M.,BIK MARPLAN Intermedia GmbH | Hippler H.-J.,SRH University of Applied Sciences Berlin
Health and Quality of Life Outcomes | Year: 2010

Background: Evidence-based medicine, the Institute of Medicine (IOM) and the German Institute for Quality and Efficiency in Health Care (IQWiG), support the inclusion of patients' preferences in health care decisions. In fact there are not many trials which include an assessment of patient's preferences. The aim of this study is to demonstrate that preferences of physicians and of patients can be assessed and that this information may be helpful for medical decision making.Method: One of the established methods for assessment of preferences is the conjoint analysis. Conjoint analysis, in combination with a computer assisted telephone interview (CATI), was used to collect data from 827 diabetes patients and 60 physicians, which describe the preferences expressed as levels of four factors in the management and outcome of the disease. The first factor described the main treatment effect (reduction of elevated HbA1c, improved well-being, absence of side effects, and no limitations of daily life). The second factor described the effect on the body weight (gain, no change, reduction). The third factor analyzed the mode of application (linked to meals or flexible application). The fourth factor addressed the type of product (original brand or generic product). Utility values were scaled and normalized in a way that the sum of utility points across all levels is equal to the number of attributes (factors) times 100.Results: The preference weights confirm that the reduction of body weight is at least as important for patients - especially obese patients - and physicians as the reduction of an elevated HbA1c. Original products were preferred by patients while general practitioners preferred generic products.Conclusion: Using the example of diabetes, the difference between patients' and physicians' preferences can be assessed. The use of a conjoint analysis in combination with CATI seems to be an effective approach for generation of data which are needed for policy and medical decision making in health care. © 2010 Porzsolt et al; licensee BioMed Central Ltd.

Stantcheva L.,Presidio | Stantchev V.,SRH University of Applied Sciences Berlin
International Journal of Human Capital and Information Technology Professionals | Year: 2014

In this paper, the authors analyze approaches for addressing sustainability in established IT-Governance frameworks. Such frameworks are considered to be a powerful tool for ensuring compliance and proper IT operation in modern organizations. The authors assume that - in the context of the seismic changes in IT provisioning and usage that current trends such as Cloud Computing and Hybrid Computing are causing - there are potentials in them to improve sustainability of organizations' operations at both IT and business level too. The analysis is conducted in a holistic way, taking into account organizational and process aspects, sustainability of resource usage, IT-related aspects, as well as incorporating the view of the overall IT-Governance. The presented case study within a mid-sized German enterprise provides a corroboration of the proposed approach by measures for both its feasibility and effectiveness. Copyright © 2014, IGI Global.

Stantchev V.,SRH University of Applied Sciences Berlin | Prieto-Gonzalez L.,SRH University of Applied Sciences Berlin | Tamm G.,SRH University of Applied Sciences Berlin
Computers in Human Behavior | Year: 2015

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. © 2014 Elsevier Ltd. All rights reserved.

Stantchev V.,SRH University of Applied Sciences Berlin | Tamm G.,SRH University of Applied Sciences Berlin
International Journal of Human Capital and Information Technology Professionals | Year: 2012

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 (Saa S). 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. Copyright © 2012, IGI Global.

Loading SRH University of Applied Sciences Berlin collaborators
Loading SRH University of Applied Sciences Berlin collaborators