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Auflistung nach Autor:in "Rapp, Barbara"

1 - 10 von 122
  • Konferenzbeitrag
    3D Visualisation of continuous, multidimensional, meteorological Satellite Data
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Lutz, Richard
    Ten years of earth observation by the MIPAS instrument aboard the European environmental satellite Envisat [1] led to a considerable amount of measurement and processed data, which has to be managed and visualized by powerful and flexible software tools. This paper gives an overview about new concepts, tools and methods for the 3D visualisation of continuous, multidimensional, meteorological Satellite Data, which are realised with WISA (Wissenschaftliches Informationssystem für die Atmosphärenforschung – Scientific Information System for atmospheric Research). A major goal of the visualisation is the recognition of correlations between different trace gas concentrations (e.g. ozone, chlorine nitrate, chlorofluorocarbons, etc.) and the visualisation of trace gas distributions where the main focus was laid on the polar areas.
  • Konferenzbeitrag
    A consumer-orientated Architecture for distributed Demand-Side-Optimization
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Dethlefs, Tim; Beewen, Dirk; Preisler, Thomas; Wolfgang, Renz
    Demand-Side-Management (DSM) is one of the key applications in the future smart grid, creating a new degree of control in order to reduce losses and fluctuations caused by volatile distributed energy resources (DERs). To integrate the consumer side, several approaches like flexible tariffs, have been proposed and tested. However, many of these approaches not have been adopted widely yet because of the needed sophisticated (and often expensive) command and control infrastructures or their impact on the user comfort. In this paper an architectural approach for a lightweight demand-side-application will be proposed. Utilizing methods of peer-to-peer (p2p) networks and abstraction patterns the architecture will be enabling consumers to form spontaneous demand-side optimization networks in order to optimize their load and to provide energy services to the Smart Grid of the future. Because of the decentralized characteristic of the architecture, the aggregation instance does not need detailed information of the optimization network, while the approach is scalable.
  • Konferenzbeitrag
    A coupled subsurface-flow and metabolism model to study the effects of solute fluxes in the hyporheic zone
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Notay, Kunwar Vikramjeet; Mendoza-Lera, Clara; Federlein, Laura L.; Molkenthin, Frank
    The hyporheic zone and the streambed host a great part of the energy and material fluxes through river ecosystems. However, the role of heterogeneities in the hyporheic zone in metabolism is not clearly understood. This paper proposes a new way to approach the question by using a coupled subsurface-flow and metabolism model for investigating the role of heterogeneities in the hyporheic metabolism. Our results show that (i) our coupled model is feasible for investigating solute fluxes in the hyporheic zone under heterogeneous set-ups, and (ii) the incorporation of heterogeneities seems be of relevance for hyporheic metabolism estimations
  • Konferenzbeitrag
    A Data Center Simulation Framework Based on an Ontological Foundation
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Memari, Ammar; Vornberger, Jan; Marx Gómez, Jorge; Nebel, Wolfgang
    The IT-for-Green project aims at developing the next generation of Corporate Environmental Management Information Systems (CEMIS). Green IT being one important aspect of this, the ITfor- Green project seeks to support the analysis of a given data center situation and to support the simulation of alternative architectures to find ways to increase energy efficiency. To facilitate this, we develop a data center simulation framework, designed to be part of a larger CEMIS platform. This is achieved through a focus on flexibility, high interoperability and open standards. Flexibility is especially achieved by building the framework on top of an underlying data center ontology. This ontological approach allows us to derive many components of the framework from a single source, maintaining the ability to quickly adapt to future requirements.
  • Konferenzbeitrag
    A Data Classification to support Collaboration in an Enterprise Network
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Allam, Nabil; Mahmoud, Tariq
    To face contemporary environmental problems, we have to find every possible new way to use the available potentials of saving environmental and natural resources. The collaboration in environmental management networks is one of these ways that opens new alternatives for environmental systems. One of the main constraints to facilitate collaboration in a network is the ability to exchange information and data. However, most enterprises are not willing to give any data to other organizations in the sense that they give away corporate secrets. The purpose of this paper is to discuss how to facilitate the work of enterprise networks by developing a data classification method to solve the problem of data exchange between companies. This developed approach should help enterprises to trust collaborating with other companies, or more specifically methods that initiate interaction and support the development of trustful relationships.
  • Konferenzbeitrag
    A framework for assessing the energy efficiency of non-mechanised agricultural systems in developing countries
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Mwambo, Francis Molua; Fürst, Christine
    There is a continuously growing global demand for agricultural products, including food, fodder and fuels that urges for reasons of ensuring a sustainable development innovative methods to assess the impact of agricultural management. Existing methods of energy efficiency analysis for agricultural systems take into account human labour and draft animal power as inputs and consider also land-use characteristics as factors affecting the production in systems in most developing African countries. However, most of these methods fail to address properly different scales in decision making, i.e. connecting the management planning level with regional development considerations. With this paper, we introduce an alternative method to assess the energy efficiency in agronomic land-use. Our work intends to conceive a comprehensive and scale sensitive assessment framework that supports consulting land-use, decision making, and policy planning.
  • Konferenzbeitrag
    A Master Program on Engineering Energy-Aware Software
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Lago, Patricia
    Software-intensive systems support most if not all aspects of modern society and in all industrial sectors. Because of software’ pervasiveness and crucial role, its energy consumption and impact on sustainability cannot be neglected anymore. As computing resources are necessary to run software, and as software runs more and more globally (e.g. in data centers and by cloud providers), time has come to engineer energy-aware software. This means educating current professionals and future generations with the appropriate skills and competencies. This paper describes the design of our program in “Software Engineering and Green IT” within our Computer Science curriculum and extending our Master Track in Software Engineering. We also introduce four types of modules that we defined to design our program, and for each type discuss the underlying rationale, learning objectives, risks and related mitigations, with the idea to offer them as building blocks for other educators.
  • Konferenzbeitrag
    A Maturity Model for Green ICT: The Case of the SURF Green ICT Maturity Model
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Hankel , Albert; Oud, Lisa; Saan, Maiko; Lago, Patricia
    This paper discusses the development and evaluation of a maturity model for Green ICT. We describe how the model was developed with the input of a number of Green ICT experts before it was released to the general public. The model consists of three domains with attributes on Green ICT that encompass both Greening of ICT as well as Greening by ICT. The quality of the model and its accuracy to capture the full scope of Green ICT has been evaluated through an online survey. We evaluated the quality of the model on relevancy of attributes, whether the attributes were well defined and whether the domains were complete. Twenty participants contributed meaningfully. Two attributes were considered to be irrelevant and six new attributes were suggested. With these results the quality of the maturity model can be improved. Our next step is to test the usefulness of the model by seeing how it is used in practice. We hope this paper inspires more work on testing the quality and usefulness of models and frameworks on Green ICT.
  • Konferenzbeitrag
    A method for the constrained interpolation of RLE-compressible chemical weather heatmaps
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Epitropou, Victor; Karatzas, Konstantinos; Kukkonen, Jaakko; Karppinen, Ari
    Chemical Weather (CW) and other geospatial environmental information produced by numerical models are often published on-line in the form of heatmaps which have undergone several lossy processing and transformation steps, resulting in a relatively low visualization and recoverable data, compared to the model data which generated them,. In this paper, a method which is finetuned to the partial reconstruction of such chemical weather data starting from discrete-level heatmaps is presented, which relies on the augmentation of ordinary interpolation methods through the use of peak-limiting functions and other constraining methods.
  • Konferenzbeitrag
    A Modelling and Simulation Environment for Real-time Pricing Scenarios in Energy Markets
    (Managing Environmental Knowledge, 2006) Sonnenschein, Michael; Stadler, Michael; Rapp, Barbara; Bremer, Jörg; Brunhorn, Stefan
    We describe an agent-based simulation tool for examining the impact of real-time pricing methods upon the power consumption of domestic users (households). The main entities within the model are electricity suppliers and electricity consumers scheduling their demand according to real-time prices for electricity. The main aspect of the modelling and simulation tool consists in very flexible methods to calculate tariffs and in detailed methods for describing the behaviour of electricity consumers communicating with their electricity supplier.