Coburg University of Applied Sciences
Coburg, Germany
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Prechtl M.,Coburg University of Applied Sciences
Vakuum in Forschung und Praxis | Year: 2016

Detection of the helical ion-paths in a small cyclotron. The small cyclotron COLUMBUS, which was developed by Gymnasium Ernestinum in cooperation with the University of Applied Sciences of Coburg, is a particle accelerator for education and teaching purposes. As a result of a magnetic field, ions move on helical paths, which are accelerated at constant intervals by a high-frequency electric field and so gain in kinetic energy. A Linear Translator moves an ion-detector across these paths; while the current position is always assigned to the corresponding ion current. The result is a specific spectrum; from the position of each peak the radii of the spiral track can be calculated as well as the energy of the ions. It is planned to equip the measuring system with a user-friendly inter-face to meet the educational requirements of the cyclotron. Copyright © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Ebert M.,Coburg University of Applied Sciences
IEEE Global Engineering Education Conference, EDUCON | Year: 2017

Learning programming is difficult due to the various associated processes. Programming concepts are abstract and language independent. However, implementing an algorithm for a specific problem in a programming language is one of the learning outcomes of programming courses. In this paper, we present a concept of programing building blocks for introducing programing concepts with associated in-class code writing tasks utilizing our web-based platform. © 2017 IEEE.

Bunger J.,Ruhr University Bochum | Krahl J.,Coburg University of Applied Sciences | Schroder O.,Johann Heinrich Von Thunen Institute | Schmidt L.,Johann Heinrich Von Thunen Institute | Westphal G.A.,Ruhr University Bochum
Critical Reviews in Toxicology | Year: 2012

Fuels from renewable resources have gained worldwide interest due to limited fossil oil sources and the possible reduction of atmospheric greenhouse gas. One of these fuels is so called biodiesel produced from vegetable oil by transesterification into fatty acid methyl esters (FAME). To get a first insight into changes of health hazards from diesel engine emissions (DEE) by use of biodiesel scientific studies were reviewed which compared the combustion of FAME with common diesel fuel (DF) for legally regulated and non-regulated emissions as well as for toxic effects. A total number of 62 publications on chemical analyses of DEE and 18 toxicological in vitro studies were identified meeting the criteria. In addition, a very small number of human studies and animal experiments were available. In most studies, combustion of biodiesel reduces legally regulated emissions of carbon monoxide, hydrocarbons, and particulate matter. Nitrogen oxides are regularly increased. Among the non-regulated emissions aldehydes are increased, while polycyclic aromatic hydrocarbons are lowered. Most biological in vitro assays show a stronger cytotoxicity of biodiesel exhaust and the animal experiments reveal stronger irritant effects. Both findings are possibly caused by the higher content of nitrogen oxides and aldehydes in biodiesel exhaust. The lower content of PAH is reflected by a weaker mutagenicity compared to DF exhaust. However, recent studies show a very low mutagenicity of DF exhaust as well, probably caused by elimination of sulfur in present DF qualities and the use of new technology diesel engines. Combustion of vegetable oil (VO) in common diesel engines causes a strongly enhanced mutagenicity of the exhaust despite nearly unchanged regulated emissions. The newly developed fuel "hydrotreated vegetable oil" (HVO) seems to be promising. HVO has physical and chemical advantages compared to FAME. Preliminary results show lower regulated and non-regulated emissions and a decreased mutagenicity. © 2012 Informa Healthcare USA, Inc.

Pfeiffer V.,Coburg University of Applied Sciences
CEUR Workshop Proceedings | Year: 2016

Teaching and learning domain-specific language (DSL) engineering and model-driven software development (MDSD) concepts are difficult tasks: either it requires a deep understanding of the nature of a domain, students lack it in general or students are exercising only single technical aspects of MDSD, so that they don't see the whole picture and are lost in the model-driven and tool "jungle". This paper explains a competence-oriented approach for model-driven software development course design to reduce the above learning difficulties. The main idea is first to define the course competencies students should have in a precise manner and second to choose an "appropriate" didactic method for each required competency. Two didactic examples are presented: Peer Instructions for MDSD fundamentals and a comprehensive MDSD software project for DSL and transformation competencies, in which students need to develop a complete workflow system for examination regulation issues. At the end we discuss the overall experience with this approach and with the current course settings. Copyright © 2016 held by the author(s).

Sedelmaier Y.,Coburg University of Applied Sciences | Landes D.,Coburg University of Applied Sciences
2014 IEEE 27th Conference on Software Engineering Education and Training, CSEE and T 2014 - Proceedings | Year: 2014

Requirements are of paramount importance for the quality of software systems. For various reasons, however, university students encounter difficulties in understanding the role of requirements and appropriately applying relevant methods to deal with requirements. This paper describes the concept for teaching requirements engineering that was devised at Coburg University of Applied Sciences. As a key idea, teaching requirements starts out from business process models. From these models, requirements for a worliflow application can be derived and specified in a requirements document. A main benefit of this approach lies in the fact that requirements are not just presented as an abstract concept. Furthermore, students are exposed to the complexity of an almost realistic worliflow application. Being more realistic than a toy project, the latter also improves understanding why requirements should be described precisely and provides opportunities to also exercise non-technical competencies that are important for successful requirements engineering. © 2014 IEEE.

Noll M.,Coburg University of Applied Sciences | Jirjis R.,Swedish University of Agricultural Sciences
Applied Microbiology and Biotechnology | Year: 2012

The demand of renewable energy sources, i.e. biomass, is steadily increasing worldwide to reduce the need of fossil energy sources. Biomass such as energy crops, woody species, forestry and agricultural residues are the most common renewable energy sources. Due to uneven demand for wood fuel, the material is mostly stored outdoors in chip piles or as logs until utilisation. Storage of biomass is accompanied by chemical, physical and biological processes which can significantly reduce the fuel quality. However, heating plants require high-quality biomass to ensure efficient operation, thereby minimising maintenance costs. Therefore, optimised storage conditions and duration times for chipped wood and tree logs have to be found. This paper aims at reviewing available knowledge on the pathways of microbial effects on stored woody biomass and on investigations of the fungal and bacterial community structure and identity. Moreover, potential functions of microorganisms present in wood chip piles and logs are discussed in terms of (1) reduction of fuel quality, (2) catalysing selfignition processes, and (3) constituting health risk and unfriendly work environment. © Springer-Verlag 2011.

Esch T.,Coburg University of Applied Sciences
Medical science monitor : international medical journal of experimental and clinical research | Year: 2011

Love and compassion exert pleasant feelings and rewarding effects. Besides their emotional role and capacity to govern behavior, appetitive motivation, and a general 'positive state', even 'spiritual' at times, the behaviors shown in love and compassion clearly rely on neurobiological mechanisms and underlying molecular principles. These processes and pathways involve the brain's limbic motivation and reward circuits, that is, a finely tuned and profound autoregulation. This capacity to self-regulate emotions, approach behaviors and even pair bonding, as well as social contact in general, i.e., love, attachment and compassion, can be highly effective in stress reduction, survival and overall health. Yet, molecular biology is the basis of interpersonal neurobiology, however, there is no answer to the question of what comes first or is more important: It is a cybernetic capacity and complex circuit of autoregulation that is clearly 'amazing'.

Hiltmann K.,Coburg University of Applied Sciences
Procedia Engineering | Year: 2015

For the prediction of failures of technical systems, a new method has been found which can be used in addition to the established methods FMEA and AFD. It is based on the idea of describing a system by means of a set of standard system parameters. The values of these are varied and the effects of the varied parameters are assessed. Since a failure as a faulty system state is one set of parameter values among others, it is expected to show up by their variation. This procedure does not require knowledge of the specific failure type. © 2015 The Authors. Published by Elsevier Ltd.

Singer F.,Coburg University of Applied Sciences
Physics Procedia | Year: 2015

Anodized aluminum oxide plays a great role in many industrial applications, e.g. in order to achieve greater wear resistance. Since the hardness of the anodized films strongly depends on its processing parameters, it is important to characterize the influence of the processing parameters on the film properties. In this work the elastic material parameters of anodized aluminum were investigated using a laser-based ultrasound system. The anodized films were characterized analyzing the dispersion of Rayleigh waves with a one-layer model. It was shown that anodizing time and temperature strongly influence Rayleigh wave propagation. © 2015 The Authors.

The invention relates to a bearing, comprising: The invention is also related to a method for determining properties of a lubricant in a bearing.

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