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Auflistung nach Autor:in "Kramer, Frederik"

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  • Konferenzbeitrag
    Classification of Techniques for Energy Efficient Load Distribution Algorithms in Clouds – A Systematic Literature Review
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Splieth, Matthias; Kramer, Frederik; Turowski, Klaus
    Cloud Computing has recently become an important driver for IT service provisioning. In addition to its associated benefits for both customers and IT service providers, cloud computing also comes along with new challenges. One of the major challenges for providers is to reduce the energy consumption, since today already more than fifty percent of operational costs in data centers account for energy. A possible way to reduce these costs is to distribute load in terms of virtual machines within the data center. Developing algorithms for this purpose has been a topic of recent research. In order to capture the state of the art of energy efficient load distribution in clouds, this paper presents a structured literature review on load distribution algorithms that aim to reduce the energy consumption in data centers for cloud computing. The algorithms are reviewed in terms of their type, their evaluation method and their potential side effects in terms of drawbacks.
  • Zeitschriftenartikel
    Enterprise Resource Planning in kleinen und mittleren Unternehmen
    (HMD Praxis der Wirtschaftsinformatik: Vol. 49, No. 3, 2012) Kramer, Frederik; Marx Gómez, Jorge; Pousttchi, Key
    Open-Source-Software (OSS) erlangt wegen der vermuteten Kostenvorteile auch in kleineren und mittleren Unternehmen (KMU) zunehmend an Bedeutung. Dieser Beitrag untersucht anhand zweier Fallstudien die Einführung eines proprietären und eines OSS-basierten Enterprise-Resource-Planning-(ERP-)Systems. Dabei werden die generell geringe Akzeptanz formaler Planungsmethoden sowie die individuellen Risikofaktoren (Wartungskosten, Anbieterabhängigkeit und Support) mittels der Fallbeispiele diskutiert. Ergebnis des Beitrags ist die Erkenntnis, dass KMU zur Einführung betrieblicher Anwendungssysteme auf methodisch fundierte Planungsprozesse setzen sollten.
  • Konferenzbeitrag
    Evaluation categorizes, technologies decision for a Composite Environmental Performance Indicators (LWC-EPI) solution
    (Innovations in Sharing Environmental Observations and Information, 2011) Jamous, Naoum; Kramer, Frederik; kassem, Gamal
    Rapid environmental changes have necessitated a closer and more critical review of current environmental policies. In light of a myopic tendency to focus on short- to medium-term objectives within organizations, environmental issues are usually not given full attention. In this regard, recommendation- or dashboard-like systems are useful to increase the awareness of management as to the impact of their decisions on the environment on a more frequent and cost-effective basis. However, the role of current environmental management information systems (EMIS) in providing organizations with the information enabling them to assess the current impact of their processes and operations on the environment has been given more prominence. Information technology is changing business in ever shortening cycles. Especially with the success of the Java platform, the standardization through the i386 hardware platform and last but not least the rivalry introduced by the Free, Libre and Open Source Software (F/LOSS) paradigm a sheer inconceivable amount of programming languages, integrated development environments, design patterns and programming frameworks have been disseminated. In this paper, we will start with a state of the art of the available tools support providing dashboard-type solutions to control and monitor the EPI’s in an organization, which may lead to reduce the gap between estimated values and current running values for environment on a more frequent basis than a mere yearly review. Furthermore, we will propose an evaluation categorizes to be used as a methodology to take the technologies decisions.
  • Konferenzbeitrag
    SME and Green-IT – A decision model
    (Proceedings of the 27th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2013) Kramer, Frederik; Jamous, Naoum
    Because of the enduring warnings of experts and the continuous impact of the climate change, sustainability has become a major concern of Small and Medium-Sized Enterprises (SMEs). The information technology sector offers a variety of products that address sustainability. These range from environmental management information systems (EMIS) to hardware (e.g. energy efficient CPUs) as well as software components (e.g. hyper-visors). As "sustainability" and especially the buzz- in almost every IT marketing campaign, a useful evaluation becomes even harder. Due to their special constraints in terms of size, focus, skills, capital, and applied decision methods, SMEs struggle even harder than large enterprise to purposefully evaluate complex technologies. This article provides a structured evaluation model of IT-based sustainability technologies for SMEs. The model is based on multi-criteria decision making (MCDM) and comprises different decision categories such as flexibility, risk, strategy, and cost / benefits as well as respective subcategories (e.g. implementation of a sustainability strategy) that we found to be important in the context of IT, SMEs, and sustainability.
  • Konferenzbeitrag
    Sustainability data integration; A prototypical implementation of a light-weight information system component
    (EnviroInfo Dessau 2012, Part 2: Open Data and Industrial Ecological Management, 2012) Jamous, Naoum; Kramer, Frederik; Turowski, Klaus; Arndt, Hans-Knud
    The environment matters. At least this is the minimum denominator the members of the World Climate Conference have been finally agreeing upon. Unfortunately a successor of the Kyoto Protocol has not yet been ratified. Induced by recent natural catastrophes an increasing public awareness of sustainability concerns became more visible. In order to fulfil the growing customers demand for greener products companies have to act and adopt new technology to fill this information gap. The information technology adoption rate has been visibly increasing during the last decade. The product and service lifecycle however is still narrowly focused on classical product or service attributes such as price, quality and availability. Hardly any of the current information systems for the midsize segment integrates environmental data. Within the frame of this paper a “business trip use case” is taken as an example to show how sustainability data can be integrated into the classical procurement process by using a light-weight and Open Source based Portlet platform technology. The example has been conducted as part of the research within the frame of the EU-project “Solution and Services Engineering for Measuring, Monitoring, and Management of Organizations’ Environmental Performance Indicators” (OEPI).
  • Konferenzbeitrag
    Towards a classification framework for very large business applications
    (INFORMATIK 2012, 2012) Dreschel, Dirk; Jamous, Naoum; Kassem, Gamal; Kramer, Frederik; Kurbjuhn, Bastian; Schrödl, Holger; Splieth, Mathias; Turowski, Klaus
    Classification of business application has significant effects for industry practice as well as for applied research. A correct classification of a business application leads to a better knowledge of the relevant characteristics and significantly helps in estimating several effects while planning, developing and maintaining the application. This paper provides a comprehensive classification framework for the quite new research area of Very Large Business Application (VLBA). The framework has been constructed by using the morphological method. From this classification framework, four different types of VLBA have been identified by their distinct characteristics. This result helps practitioners as well as scholars to gain a deeper and more distinct understanding of the relevant factors of VLBA.