@inproceedings{ZellmannBluemel2018,
  author    = {Zellmann, Cedrik and Bl{\"u}mel, Ina},
  title     = {Systems librarian, IT librarian, data librarian - Demand for graduates in Germany, Austria and Switzerland: a quantitative job advertisement analysis},
  series = {The Future of Education in Information Science, Proceedings from FEIS - International EINFOSE Symposium 10-11 September 2018 Pisa, Italy},
  booktitle = {The Future of Education in Information Science, Proceedings from FEIS - International EINFOSE Symposium 10-11 September 2018 Pisa, Italy},
  editor    = {Aparac-Jelušić, Tatjana and Casarosa, Vittore and Macevičiūtė, Elena},
  publisher = {Faculty of Humanities and Social Sciences, University of Osijek},
  address   = {Osijek, Croatia},
  isbn      = {978-953-314-120-6},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus4-12924},
  pages     = {187 -- 197},
  year      = {2018},
  abstract  = {This paper deals with new job profiles in libraries, mainly systems librarians (German: Systembibliothekare), IT librarians (German: IT-Bibliothekare) and data librarians (German: Datenbibliothekare). It investigates the vacancies and requirements of these positions in the German-speaking countries by analyzing one hundred and fifty published job advertisements of OpenBiblioJobs between 2012-2016. In addition, the distribution of positions, institutional bearers, different job titles as well as time limits, scope of work and remuneration of the positions are evaluated. The analysis of the remuneration in the public sector in Germany also provides information on demands for a bachelor's or master's degree. The average annual increase in job vacancies between 2012 and 2016 is 14.19\%, confirming the need and necessity of these professional library profiles. The higher remuneration of the positions in data management, in comparison to the systems librarian, proves the prerequisite of the master's degree and thus indicates a desideratum due to missing or few master's degree courses. Accordingly, the range of bachelor's degree courses (or IT-oriented major areas of study with optional compulsory modules in existing bachelor's degree courses) for systems and IT librarians must be further expanded. An alternative could also be modular education programs for librarians and information scientists with professional experience, as it is already the case for music librarians.},
  language  = {en}
}
@techreport{Wohlfeil2006,
  type      = {Working Paper},
  author    = {Wohlfeil, Stefan},
  title     = {Security Management with Open Source Tools},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus-2745},
  year      = {2006},
  abstract  = {This document describes the work done during the Research Semester in Summer 2006 of Prof. Dr. Stefan Wohlfeil. It is about Security Management tasks and how these tasks might be supported by Open Source software tools. I begin with a short discussion of general management tasks and describe some additional, security related management tasks. These security related tasks should then be added to a software tool which already provides the general tasks. Nagios is such a tool. It is extended to also perform some of the security related management tasks, too. I describe the new checking scripts and how Nagios needs to be configured to use these scripts. The work has been done in cooperation with colleagues from the Polytech- nic of Namibia in Windhoek, Namibia. This opportunity was used to also establish a partnership between the Department of Computer Science at FH Hannover and the Department of Information Technology at the Polytechnic. A first Memorandum of Agreement lays the groundwork for future staff or student exchange.},
  subject      = {Computersicherheit},
  language  = {en}
}
@inproceedings{WesthuisBrunsDunkel2012,
  author    = {Westhuis, Johannes and Bruns, Ralf and Dunkel, J{\"u}rgen},
  title     = {Using CEP-based blackboards for coordinating mobile RFID agents},
  series = {Proceedings of the First International Conference on Agreement Technologies, Dubrovnik, Croatia, October 15-16, 2012},
  booktitle = {Proceedings of the First International Conference on Agreement Technologies, Dubrovnik, Croatia, October 15-16, 2012},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus4-10657},
  pages     = {107 -- 108},
  year      = {2012},
  abstract  = {In huge warehouses or stockrooms, it is often very difficult to find a certain item, because it has been misplaced and is therefore not at its assumed position. This position paper presents an approach on how to coordinate mobile RFID agents using a blackboard architecture based on Complex Event Processing.},
  language  = {en}
}
@article{WesselsGeuen2018,
  author    = {Wessels, Michael and Geuen, Dorith},
  title     = {On the slow implementation of pilot projects: Suspected causes from the perspective of statutory health insurance funds},
  series = {International Journal of Health Professions},
  volume    = {2018},
  journal   = {International Journal of Health Professions},
  number    = {5(1)},
  issn      = {2296-990X},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus4-13339},
  pages     = {64 -- 71},
  year      = {2018},
  abstract  = {Background: The system of nursing care in Germany is currently changing. For years, a further development of cooperation in the health care sector has been discussed. And thus a change in the distribution of tasks between health care professions. In 2008, the legislature introduced the introduction of pilot projects for the transfer of medicinal tasks to nurses according to \S 63 para. 3c Social Code V. The implementation is very sluggish. The aim of the study was to analyze the reasons for this sluggish implementation from the perspective of the statutory health insurance funds. Methods: Quantitative survey of all statutory health insurance funds (n=124) in Germany. Results: To ensure supply, 94 \% of health insurance companies consider the transfer of medical tasks to non-medical care providers as a sensible approach. Also 96 \% consider this to be very important in order to ensure care. Although 96 \% of health insurance funds support the implementation of pilot projects, only 8 \% are in fact involved in such contracts; 71 \% do not plan own pilot projects for the future. In the view of the statutory health insurance funds, legal obstacles (90 \%), resistance by medical representatives (84 \%), unresolved financing (74 \%) and liability issues (70 \%) as well as non-applicable regulations in G-BA-directive (79 \%) and the law (85 \%). Less than half (46 \%) of the health insurance companies suspect high costs causing the slow implementation. Discussion: The amendments adopted by the legislature in the current reform of the law on care professions can be described as appropriate; in particular the fact that statutory health insurance funds should implement and carry out appropriate pilot projects by 31 December 2020. Transfer},
  subject      = {Pflegeberufereformgesetz},
  language  = {en}
}
@masterthesis{Weiner2016,
  type      = {Bachelor Thesis},
  author    = {Weiner, Mareike},
  title     = {Cradle to Cradle - An analysis of the market potential in the German outdoor apparel industry},
  doi       = {10.25968/opus-1051},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus4-10515},
  school      = {Hochschule Hannover},
  year      = {2016},
  abstract  = {The purpose of this study is to investigate the market potential in the German outdoor apparel industry by focusing on sustainable production in terms of environmental and human health. A literature study of the Cradle to Cradle (C2C) design concept is provided, as it represents a solution for pollution, waste and environmental destruction caused by the current industrial design and waste management. The data for the subsequent market- and competitive analysis of the German outdoor apparel industry was collected through secondary research in order to identify several key market indicators for the assessment of the market potential. The outcome of this research is the identification of a positioning strategy for outdoor apparel according to the C2C design concept. The results show stagnant growth rates in recent years in the German outdoor apparel market and strong rivalry among the competitors. However, a significant market potential was calculated and beneficial trends for sustainable outdoor brands were recognised. These findings reveal the existence of a market potential for an outdoor apparel brand according to the C2C design concept. By following a positioning strategy of transparency and full commitment to a sustainable production, the company might be able to gain market shares from its competitors, as future predictions indicate slow growth rates in the market. The results of this analysis can be of great interest for entrepreneurs that plan to enter the German outdoor apparel industry.},
  subject      = {Nachhaltigkeit},
  language  = {en}
}
@inproceedings{WartenaSommer2012,
  author    = {Wartena, Christian and Sommer, Maike},
  title     = {Automatic classification of scientific records using the German Subject Heading Authority File (SWD)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus-4008},
  year      = {2012},
  abstract  = {The following paper deals with an automatic text classification method which does not require training documents. For this method the German Subject Heading Authority File (SWD), provided by the linked data service of the German National Library is used. Recently the SWD was enriched with notations of the Dewey Decimal Classification (DDC). In consequence it became possible to utilize the subject headings as textual representations for the notations of the DDC. Basically, we we derive the classification of a text from the classification of the words in the text given by the thesaurus. The method was tested by classifying 3826 OAI-Records from 7 different repositories. Mean reciprocal rank and recall were chosen as evaluation measure. Direct comparison to a machine learning method has shown that this method is definitely competitive. Thus we can conclude that the enriched version of the SWD provides high quality information with a broad coverage for classification of German scientific articles.},
  subject      = {Notation <Klassifikation>},
  language  = {en}
}
@inproceedings{WartenaGarciaAlsina2013,
  author    = {Wartena, Christian and Garcia-Alsina, Montserrat},
  title     = {Challenges and Potentials for Keyword Extraction from Company Websites for the Development of Regional Knowledge Maps},
  series = {Proceedings of the 5th International Conference on Knowledge Discovery and Information Retrieval (KDIR)},
  booktitle = {Proceedings of the 5th International Conference on Knowledge Discovery and Information Retrieval (KDIR)},
  doi       = {10.5220/0004660002410248},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus4-3911},
  pages     = {241 -- 248},
  year      = {2013},
  abstract  = {Regional Innovation Systems describe the relations between actors, structures and infrastructures in a region in order to stimulate innovation and regional development. For these systems the collection and organization of information is crucial. In the present paper we investigate the possibilities to extract information from websites of companies. First we describe regional innovation systems and the information types that are necessary to create them. Then we discuss the possibilities of text mining and keyword extraction techniques to extract this information from company websites. Finally, we describe a small scale experiment in which keywords related to economic sectors and commodities are extracted from the websites of over 200 companies. This experiment shows what the main challenges are for information extraction from websites for regional innovation systems.},
  language  = {en}
}
@techreport{Wartena2012,
  type      = {Working Paper},
  author    = {Wartena, Christian},
  title     = {Comparing segmentation strategies for efficient video passage retrieval},
  doi       = {10.1109/CBMI.2012.6269850},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus-3983},
  year      = {2012},
  abstract  = {We compare the effect of different text segmentation strategies on speech based passage retrieval of video. Passage retrieval has mainly been studied to improve document retrieval and to enable question answering. In these domains best results were obtained using passages defined by the paragraph structure of the source documents or by using arbitrary overlapping passages. For the retrieval of relevant passages in a video, using speech transcripts, no author defined segmentation is available. We compare retrieval results from 4 different types of segments based on the speech channel of the video: fixed length segments, a sliding window, semantically coherent segments and prosodic segments. We evaluated the methods on the corpus of the MediaEval 2011 Rich Speech Retrieval task. Our main conclusion is that the retrieval results highly depend on the right choice for the segment length. However, results using the segmentation into semantically coherent parts depend much less on the segment length. Especially, the quality of fixed length and sliding window segmentation drops fast when the segment length increases, while quality of the semantically coherent segments is much more stable. Thus, if coherent segments are defined, longer segments can be used and consequently less segments have to be considered at retrieval time.},
  subject      = {Information Retrieval},
  language  = {en}
}
@techreport{Wartena2013,
  type      = {Working Paper},
  author    = {Wartena, Christian},
  title     = {Distributional Similarity of Words with Different Frequencies},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:960-opus-4077},
  year      = {2013},
  abstract  = {Distributional semantics tries to characterize the meaning of words by the contexts in which they occur. Similarity of words hence can be derived from the similarity of contexts. Contexts of a word are usually vectors of words appearing near to that word in a corpus. It was observed in previous research that similarity measures for the context vectors of two words depend on the frequency of these words. In the present paper we investigate this dependency in more detail for one similarity measure, the Jensen-Shannon divergence. We give an empirical model of this dependency and propose the deviation of the observed Jensen-Shannon divergence from the divergence expected on the basis of the frequencies of the words as an alternative similarity measure. We show that this new similarity measure is superior to both the Jensen-Shannon divergence and the cosine similarity in a task, in which pairs of words, taken from Wordnet, have to be classified as being synonyms or not.},
  subject      = {Synonymie},
  language  = {en}
}
@inproceedings{Wartena2014,
  author    = {Wartena, Christian},
  title     = {On the effect of word frequency on distributional similarity},
  series = {Proceedings of the 12th edition of the KONVENS conference Vol. 1},
  booktitle = {Proceedings of the 12th edition of the KONVENS conference Vol. 1},
  address   = {Hildesheim},
  isbn      = {978-3-934105-46-1},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:hil2-opus-2634},
  pages     = {10},
  year      = {2014},
  abstract  = {The dependency of word similarity in vector space models on the frequency of words has been noted in a few studies, but has received very little attention. We study the influence of word frequency in a set of 10 000 randomly selected word pairs for a number of different combinations of feature weighting schemes and similarity measures. We find that the similarity of word pairs for all methods, except for the one using singular value decomposition to reduce the dimensionality of the feature space, is determined to a large extent by the frequency of the words. In a binary classification task of pairs of synonyms and unrelated words we find that for all similarity measures the results can be improved when we correct for the frequency bias.},
  language  = {en}
}