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
Mau M.,Leibniz Institute of Plant Genetics and Crop Plant Research |
Lovell J.T.,University of Texas at Austin |
Corral J.M.,Coburg University of Applied Sciences |
Kiefer C.,Max Planck Institute for Plant Breeding Research |
And 4 more authors.
Proceedings of the National Academy of Sciences of the United States of America | Year: 2015
Asexual reproduction is expected to reduce the adaptive potential to novel or changing environmental conditions, restricting or altering the ecological niche of asexual lineages. Asexual lineages of plants and animals are typically polyploid, an attribute that may influence their genetic variation, plasticity, adaptive potential, and niche breadth. The genus Boechera (Brassicaceae) represents an ideal model to test the relative ecological and biogeographic impacts of reproductive mode and ploidy because it is composed of diploid sexual and both diploid and polyploid asexual (i.e., apomictic) lineages. Here, we demonstrate a strong association between a transcriptionally conserved allele and apomictic seed formation. We then use this allele as a proxy apomixis marker in 1,649 accessions to demonstrate that apomixis is likely to be a common feature across the Boechera phylogeny. Phylogeographic analyses of these data demonstrate (i) species-specific niche differentiation in sexuals, (ii) extensive niche conservation between differing reproductive modes of the same species, (iii) ploidy-specific niche differentiation within and among species, and (iv) occasional niche drift between apomicts and their sexual ancestors. We conclude that ploidy is a substantially stronger and more common driver of niche divergence within and across Boechera species although variation in both traits may not necessarily lead to niche evolution on the species scale. © 2015, National Academy of Sciences. All rights reserved.
Koch M.,Coburg University of Applied Sciences |
Landes D.,Coburg University of Applied Sciences
Advances in Intelligent Systems and Computing | Year: 2014
Software engineering has become increasingly important over the last years, not only for computer scientists. The research project EVELIN (Experimental improVEment of Learning software engINeering) aims at identifying competencies which students should have, and didactic approaches that most appropriate to foster a set of given competencies in the context of software engineering. In this context, a web-based software system for storing research documents and research results has been designed and implemented. Important features of this software are its ability to store competencies and competency profiles, represent them in a graphical manner, and link them to courses and didactic approaches. The repository and its data model are supposed to form the basis for in-depth analyses of influences on the teaching and learning of software engineering - for example by using data-mining methods. In the future, the software should actively support lecturers and educational scientists in their work on improving software engineering education. © Springer International Publishing Switzerland 2014.
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.
Hassaneen A.,Helwan University |
Munack A.,Institute of Agriculture Technology and Biosystems Engineering |
Ruschel Y.,Institute of Agriculture Technology and Biosystems Engineering |
Schroeder O.,Institute of Agriculture Technology and Biosystems Engineering |
Krahl J.,Coburg University of Applied Sciences
Fuel | Year: 2012
The effect of RME (Rapeseed Methyl Ester) biodiesel and GTL (Gas-to-Liquid) fuels on the fuel consumption and emission characteristics including particulate matter of diesel engine was investigated. The engine tests were carried out based on the ESC 13-mode test procedure. Particulate Matter (PM) distribution was analyzed using the scanning mobility particle seizer (SMPS). Compared to the base line diesel fuel;biodiesel (RME) emitted up to 70% less specific CO;up to 50% less specific HC;and 60% less specific PM emissions. For RME fuel;the majority of the particle numbers were in the diameter range of 10-30 nm. For the conventional diesel and GTL fuels;the majority of PM emissions were in the diameter range of 30-200 nm. The GTL fuel emitted slightly less specific CO;HC;NO x;and PM than the conventional diesel fuel. The major deficit of the biodiesel fuel was its higher specific fuel consumption rate that was in the range up to 15% (by weight) higher than the other fuels. A relatively higher NO x and CO 2 emission at most of the engine loads was encountered for biodiesel fuel. The CO 2 emission of the GTL fuel was up to 5% lower than the specific CO 2 emission of the other two fuels. © 2012 Elsevier Ltd. All rights reserved.
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.
Coburg University of Applied Sciences | Date: 2010-12-22
The invention relates to a bearing, comprising: The invention is also related to a method for determining properties of a lubricant in a bearing.