Auflistung nach Autor:in "Barthel, Stefan"
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- KonferenzbeitragGSBL: Giving Germany’s Most Comprehensive Chemical Substances Data Pool a Convincing Face(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Barthel, Stefan; Zischner, Karsten; Minx, GunnarThis paper describes the concept of the user-oriented redesigning process of the Joint Substance Data Pool of the German Federal Government and Federal States (GSBL). The GSBL contains at all relevant information on 63.000 pure chemical substances, 320.000 mixtures of substances and 207.000 concerning legal regulations. Redesigning is necessary, because current and potential users are not satisfied with the usability of the retrieval application and the search result presentation. The substance search is partially so complex that trainings courses and detailed instruction manuals are inquired. In order to achieve a tailor-made solution for current and potential key users as well as for user that have or have not been used the GSBL’s retrieval application before, a promising redesigning process is introduced and established usability techniques are utilized.
- KonferenzbeitragGSBLapp: Tailored Chemical Substance Information for Arbitrary On-Site Usage on Mobile Devices(EnviroInfo & ICT4S, Adjunct Proceedings, 2015) Barthel, Stefan; Pfofey, Tristan; Rößlery , Christian; Bozemy, MariusTechnical assistance for the provision of substance information for firefighters, specialist consultants and rescue services replaces more and more conventional, paper-based solutions. Recently, the Federal Environment Agency of Germany developed a mobile application for smart phones and tablets specially tailored to the needs of firefighters. This so called GSAapp allows users to efficiently and instantly search offline for information on 16000 substances. We realized soon that there are additional possibilities of use for chemical substance data and relevant chemicals-related legislation on mobile devices. However, we noted that required techniques and functionality are similar for such applications. Therefore, we developed one mobile application that is customizable for different scenarios. We present the approach and our results in this paper.
- KonferenzbeitragThe monetary value of information: A leakage-resistant data valuation(Datenbanksysteme für Business, Technologie und Web (BTW) 2013 - Workshopband, 2013) Barthel, Stefan; Schallehn, EikeThe importance of information as a main asset of a company or organization is widely acknowledged nowadays. The loss of or the unauthorized access to sensitive information are critical and can possibly send a company into bankruptcy. Furthermore, the risk of information larceny is most often not caused by a direct attack of unauthorized outsiders, but by authorized extractions by malicious or unaware insiders passing data to unauthorized outsiders. Unfortunately, this problem cannot be solved by the typically used role-based authentication. The detection of malicious accesses based on typical access characteristics, which has inspired some research, is limited in its potential. Therefore, we present a conceptual approach based on the valuation of information, i.e., using a description of the actual worth of data items within database systems. This allows to rate potential losses on the fly as well as preventing valuable extractions done by insiders. In detail, we describe a mechanism called leakage-resistant data valuation that calculates a monetary value for every query and takes according action if the cumulated monetary value exceeds a threshold (per query or per time span).