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Laporte M.-A.,German Center for Integrative Biodiversity Research iv Halle Jena Leipzig | Mougenot I.,UMR 228 ESPACE DEV | Garnier E.,CNRS Center of Evolutionary and Functional Ecology | Stahl U.,German Center for Integrative Biodiversity Research iv Halle Jena Leipzig | And 5 more authors.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014

To address biodiversity issues in ecology and to assess the consequences of ecosystem changes, large quantities of long-term observational data from multiple datasets need to be integrated and characterized in a unified way. Linked open data initiatives in ecology aim at promoting and sharing such observational data at the web-scale. Here we present a web infrastructure, named Thesauform, that fully exploits the key principles of the semantic web and associated key data standards in order to guide the scientific community of experts to collectively construct, manage, visualize and query a SKOS thesaurus. The study of a thesaurus dedicated to plant functional traits demonstrates the potential of this approach. A point of great interest is to provide each expert with the opportunity to generate new knowledge and to draw novel plausible conclusions from linked data sources. Consequently, it is required to consider both the scientific topic and the objects of interest for a community of expertise. The goal is to enable users to deal with a small number of familiar and conceptual dimensions, or in other terms, facets. In this regard, a faceted search system, based on SKOS collections and enabling thesaurus browsing according to each end-users requirements is expected to greatly enhance data discovery in the context of biodiversity studies. © 2014 Springer International Publishing Switzerland.


Nadrowski K.,University of Leipzig | Ratcliffe S.,University of Leipzig | Bonisch G.,Max Planck Institute for Biogeochemistry | Bruelheide H.,Martin Luther University of Halle Wittenberg | And 12 more authors.
Methods in Ecology and Evolution | Year: 2013

The integrative research field of biodiversity-ecosystem functioning (BEF) requires close collaboration between researchers from different disciplines working on different scales in time, space as well as taxon resolution. Data can describe anything from abiotic ecosystem components, to organisms, parts of organisms, genetic information or element stocks and flows. Researchers prefer the convenience of spreadsheets for data preparation, which can lead to isolated data sets that are diverse in structure and follow diverging naming conventions. BEFdata (https://github.com/befdata/befdata) is a new, open source web platform for the upload, validation and storage of data from a formatted Excel workbook. Metadata can be downloaded in Ecological Metadata Language (EML). BEFdata allows the harmonization of naming conventions by generating category lists from the primary data, which can be reviewed and managed via the Excel workbook or directly on the platform. BEFdata provides a secure environment during ongoing analysis; project members can only access primary data from other researchers after the acceptance of a data request. Due to its generic database schema, BEFdata platforms can be used for any research domain working with tabular data. It supports the compilation of coherent data sets at the level of the primary data, allowing researchers to explicitly model correlation structures across data sets for synthesis. The EML export enables efficient publishing of data in global repositories. © 2012 The Authors. Methods in Ecology and Evolution © 2012 British Ecological Society.


Abdelkafi N.,Fraunhofer Institute for Central and Eastern Europe | Bartl M.,HYVE AG | Fuller J.,HYVE AG | Ihl C.,RWTH Aachen | Rieger M.,HYVE AG
INFORMATIK 2010 - Service Science - Neue Perspektiven fur die Informatik, Beitrage der 40. Jahrestagung der Gesellschaft fur Informatik e.V. (GI) | Year: 2010

This paper introduces the open school concept, which aims to strengthen the openness of the university to its students. In an open school, students do not take a passive role as service consumers; they are active members of their university. Though the open school reflects a new mindset in higher education, it uses available technologies. The web-based platform for Crowd Sourcing, IDEANET, is an adequate system to support universities in launching an open school project. Three case studies conducted at German higher education institutions demonstrate the feasibility of the concept and show that students are willing to make contributions. Grades and promises from the university's side to actually implement students' best ideas can be used as reward mechanisms. In some circumstances, however, the use of grades can raise some conflicts.


Kondziella H.,Fraunhofer Institute for Central and Eastern Europe | Bruckner T.,Fraunhofer Institute for Central and Eastern Europe | Bruckner T.,University of Leipzig
Renewable and Sustainable Energy Reviews | Year: 2016

It is expected that an energy system faces increasing flexibility requirements in order to cope with increasing contributions from variable renewable energy sources (VRE). In general, the instant balance of temporal and spatial inequalities of the electricity system can be achieved by many compensating measures. However, a thorough and precise quantification of the flexibility demand of a VRE based energy system turns out to be a complex task. So far, literature on energy economics and engineering has provided analyses concerning various aspects of the system requirements for flexibility. Accordingly, this review paper primarily aims to categorize the scientific approaches that have been used in "flexibility demand" studies. In this context, we classify exemplary study results from the German and European energy systems into technical, economic, and market potential categories to enhance their comparability. Moreover, we conduct a methodological evaluation of the literature findings to determine further research requirements. Against this background we also discuss a conceptual framework to quantify the market potential of flexible technologies. © 2015 Elsevier Ltd. All rights reserved.


Abdelkafi N.,Fraunhofer Institute for Central and Eastern Europe | Abdelkafi N.,University of Leipzig | Tauscher K.,Fraunhofer Institute for Central and Eastern Europe | Tauscher K.,University of Leipzig
Organization and Environment | Year: 2016

To achieve sustainability, a firm has to transform its entire business logic. A business model for sustainability (BMfS) aims at creating value for various stakeholders and the natural environment. This article advances the current understanding of the basic functioning of BMfS by applying a systems perspective. Our BMfS understanding incorporates the natural environment as an essential element, but does not deal with sustainability from a broad perspective. The core logic of a BMfS is built upon the creation of a reinforcing feedback loop between the created value to the customers, the value captured by the firm, and the value to the natural environment. Consequently, we develop a graphical model based on system dynamics notation. First, we conceptualize the basic feedback loops. Then, we propose partial models for the firm, natural environment, entrepreneur/manager, and customer, and then integrate these partial models within a systemic, multilevel model. Finally, we generate propositions that combine insights from the model and extant literature. © 2015, 2015 SAGE Publications.


Kroll H.,Fraunhofer Institute for Systems and Innovation Research | Dornbusch F.,Fraunhofer Institute for Central and Eastern Europe | Schnabl E.,Fraunhofer Institute for Systems and Innovation Research
Regional Studies | Year: 2015

Kroll H., Dornbusch F. and Schnabl E. Universities' regional involvement in Germany: how academics' objectives and opportunity shape choices of activity, Regional Studies. As acknowledged in prior studies, universities' patterns of regional involvement can differ widely and have to be considered from a much broader perspective than once suggested. This paper provides a first comprehensive identification of aspects underlying this diversity. Building on the assumption that much regional engagement rests on individual choices, it draws on a sample of about 1500 German academics to identify and corroborate the role of key factors influencing these choices in regression models. In line with assumptions, this paper finds that choices to engage regionally are strongly contingent on intrinsic motivations. Nonetheless, framework conditions do play a significant role. © 2015 Regional Studies Association

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