Nordhausen University of Applied Sciences
Nordhausen, Germany

The Nordhausen University of Applied science is located in Nordhausen, Thuringia, Germany. As of 2012, the Fachhochschule has 2,461 students enrolled and 45 professors. It offers Bachelor's and Master's degrees in business administration, public management, and business engineering, among others. Wikipedia.

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Schuster J.,Helmholtz Center for Environmental Research | Purswani J.,University of Granada | Breuer U.,Nordhausen University of Applied Sciences | Clementina Pozo,University of Granada | And 3 more authors.
Applied and Environmental Microbiology | Year: 2013

In Rhodococcus ruber IFP 2001, Rhodococcus zopfii IFP 2005, and Gordonia sp. strain IFP 2009, the cytochrome P450 monooxygenase EthABCD catalyzes hydroxylation of methoxy and ethoxy residues in the fuel oxygenates methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE), and tert-amyl methyl ether (TAME). The expression of the IS3-type transposase-flanked eth genes is ETBE dependent and controlled by the regulator EthR (C. Malandain et al., FEMS Microbiol. Ecol. 72:289-296, 2010). In contrast, we demonstrated by reverse transcription-quantitative PCR (RT-qPCR) that the betaproteobacterium Aquincola tertiaricarbonis L108, which possesses the ethABCD genes but lacks ethR, constitutively expresses the P450 system at high levels even when growing on nonether substrates, such as glucose. The mutant strain A. tertiaricarbonis L10, which is unable to degrade dialkyl ethers, resulted from a transposition event mediated by a rolling-circle IS91-type element flanking the eth gene cluster in the wild-type strain L108. The constitutive expression of Eth monooxygenase is likely initiated by the housekeeping sigma factor σ70, as indicated by the presence in strain L108 of characteristic-10 and-35 binding sites upstream of ethA which are lacking in strain IFP 2001. This enables efficient degradation of diethyl ether, diisopropyl ether, MTBE, ETBE, TAME, and tert-amyl ethyl ether (TAEE) without any lag phase in strain L108. However, ethers with larger residues, n-hexyl methyl ether, tetrahydrofuran, and alkyl aryl ethers, were not attacked by the Eth system at significant rates in resting-cell experiments, indicating that the residue in the ether molecule which is not hydroxylated also contributes to the determination of substrate specificity. © 2013, American Society for Microbiology.

Genske D.D.,University of Liechtenstein | Huang D.,ETH Zurich | Ruff A.,Nordhausen University of Applied Sciences
International Journal of Automation and Computing | Year: 2010

This paper focuses on land resource consumption due to urban sprawl. Special attention is given to shrinking regions, characterized by economic decline, demographic change, and high unemployment rates. In these regions, vast terrain is abandoned and falls derelict. A geographic information system (GIS) based multi-criteria decision tool is introduced to determine the reuse potential of derelict terrain, to investigate the possible reuse options (housing, business and trade, industry, services, tourism and leisure, and re-greening), and to visualize the best reuse options for groups of sites on a regional scale. Achievement functions for attribute data are presented to assess the best reuse options based on a multi-attribute technique. The assessment tool developed is applied to a model region in Germany. The application of the assessment tool enables communities to become aware of their resources of derelict land and their reuse potential. © 2010 Institute of Automation, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg.

Gebhard B.,Fakultat Wirtschafts and Sozialwissenschaften | Gebhard B.,Nordhausen University of Applied Sciences | Fink A.,Martin Luther University of Halle Wittenberg
Klinische Padiatrie | Year: 2015

Background: For children and adolescents social participation is a central goal of rehabilitation processes. Available measurements and evaluation tools are exposed to the problem that the theoretical foundation of the construct of participation is still unclear as well as differentiation from activity in the International Classification of Functioning, Disabilities and Health (ICF/ICF-CY) of the WHO is not made sufficiently. Objectives: The objectives of this article were (1) to illustrate the scientific discussions on the term and understanding of participation from rehabilitation science perspectives and (2) to conclude implications for practice and science. Materials and Methods: A systematic search for participation instruments was performed in MEDLINE, CINAHL, PsycINFO, ERIC und EMBASE in August 2014. Results: The available instruments are based on very different definitions of participation. The discussion about the term seems to be not yet complete. A major demand is a better operationalization of activity and participation according to the ICF/ICF-CY in the instruments. Conclusions: Before using an existing instrument, the transferability should be tested for the own context. The theoretical assumptions of participation in conjunction to ICF/ICF-CY as well as the objectives of the instrument should all be clearly understood before using an existing instrument but also before the development of new instruments. © 2015 Georg Thieme Verlag KG Stuttgart.New York.

Lutsch D.V.,Isi GmbH and Co. KG | Scharf A.,Nordhausen University of Applied Sciences | Zanger C.,TU Chemnitz
Food Quality and Preference | Year: 2015

This study aims at better understanding the effect of a multimodal stimulation on liking. So far, most product design and product presentation related research on multimodal stimulation focused on congruence of stimuli intensity or message congruence only. Next to a multimodal stimulation, the product's ability to activate human motivations/need states can positively influence product liking, too. By taking these insights into consideration, the survey was designed to investigate the effect of a need state congruent stimulation on liking moderated by the target group's need states. For this purpose, an experiment was carried out in which 360 respondents evaluated face lotion packages. The stimuli combination followed a factorial design, including the sensory modalities optics, haptics, acoustics and olfaction. One half of the stimuli were designed to activate the need for affiliation, the other half to address the need for achievement - both basic motivations to use face lotion. For both need states a moderating effect can be observed, i.e. best results can be stated for need state congruent stimulations that were rated by respondents with a high specific need state. © 2014 Elsevier Ltd.

PubMed | Martin Luther University of Halle Wittenberg, Zwickau University of Applied Sciences, University of Oldenburg, Nordhausen University of Applied Sciences and University of Applied Sciences, Berlin
Type: Journal Article | Journal: Child: care, health and development | Year: 2016

The introduction of the International Classification of Functioning, Disabilities and Health of the World Health Organization in 2001 made social participation a major rehabilitation outcome and the ultimate goal of rehabilitation services. There is no available instrument to measure the youth participation in leisure activities apart from asking the youth themselves. The goal of this study was to present a German version of the Childrens Assessment of Participation and Enjoyment and Preferences for Activities of Children (CAPE/PAC).The CAPE/PAC questionnaire was translated into German, a cultural adaptation process was designed and a reliability study was conducted. One hundred and fifty-two youths with and without disabilities, with a mean age of 15.2years (standard deviation 1.7), participated in the study. The participants completed CAPE and PAC twice within 4weeks. Reliability was examined by intraclass correlation coefficients, standard error of measurement, smallest detectable change and Cronbachs alpha.The absolute values of participation differ between the typically developed youth group and those with impairments; the reliability of the CAPE/PAC is comparable in both groups. Intraclass correlation coefficients ranged from 0.43 to 0.74 for the CAPE and from 0.71 to 0.83 for the PAC in all participants. The alpha values for internal consistency ranged from 0.42 to 0.82 for the CAPE and from 0.65 to 0.92 for the PAC.The German version of the PAC showed satisfactory reliability; however, reliability was not satisfactory for all scores of the CAPE, but comparable with versions in other languages. The need for newly developed participation measurements requires further discussion.

Hartung M.,Nordhausen University of Applied Sciences | Viehmann M.,Nordhausen University of Applied Sciences | Nowottnick M.,University of Rostock
Proceedings of the International Spring Seminar on Electronics Technology | Year: 2016

The studies were aimed at proving that the service life of electronic assemblies can be extended through dynamic stress reduction. This objective could be reached with the aid of a controller-based parameter regulator PR and an intervention procedure which records stress-determining variables and adjusts assembly control action in such a way that total stress is minimized. © 2016 IEEE.

Voswinckel S.,Nordhausen University of Applied Sciences | Manz P.,Nordhausen University of Applied Sciences | Schmidt C.,Nordhausen University of Applied Sciences | Wesselak V.,Nordhausen University of Applied Sciences
Energy Procedia | Year: 2014

System induced degradation can occur depending on the system design of PV power plants. In case of amorphous silicon solar modules this causes e.g. a diffusion of sodium ions from the cover glass into the TCO front contact, followed by a chemical reaction that leads to an irreversible power loss and is called TCO-corrosion. Leakage currents between the cover glass and the electrical connectors can be used as an indicator of the corrosion rate. It is state-of-the-art that a negative potential of the TCO-layer in respect to the cover class (resp. mounting structure) can have an impact on the corrosion process. To avoid corrosion the negative DC pole of the PV-generator has to be grounded. Thus a positive potential occurs between the TCO-layer and the cover glass and the positive charged sodium ions do not migrate into the TCO-layer [2]. In contrast to this, the results of newer studies show that the corrosion occurs for positive potentials, too [3, 4]. Consequently the basic objective of this paper is the analysis of leakage currents according to the mounting and grounding situation of amorphous silicon solar modules under outdoor conditions. For this purpose nine amorphous silicon solar modules were mounted with different mounting systems, with backrails and module clamps. Furthermore, an external voltage with negative and positive bias is applied between the mounting system and the short-circuited module connectors. Additionally the influence of an AC potential is investigated. This case may occur due to perturbations of an inverter. The leakage currents were measured and logged continuously. © 2014 The Authors. Published by Elsevier Ltd.

Saint-Mont U.,Nordhausen University of Applied Sciences
PLoS ONE | Year: 2015

According to R.A. Fisher, randomization "relieves the experimenter from the anxiety of considering innumerable causes by which the data may be disturbed." Since, in particular, it is said to control for known and unknown nuisance factors that may considerably challenge the validity of a result, it has become very popular. This contribution challenges the received view. First, looking for quantitative support, we study a number of straightforward, mathematically simple models. They all demonstrate that the optimism surrounding randomization is questionable: In small to medium-sized samples, random allocation of units to treatments typically yields a considerable imbalance between the groups, i.e., confounding due to randomization is the rule rather than the exception. In the second part of this contribution, the reasoning is extended to a number of traditional arguments in favour of randomization. This discussion is rather non-technical, and sometimes touches on the rather fundamental Frequentist/ Bayesian debate. However, the result of this analysis turns out to be quite similar: While the contribution of randomization remains doubtful, comparability contributes much to a compelling conclusion. Summing up, classical experimentation based on sound background theory and the systematic construction of exchangeable groups seems to be advisable. © 2015 Uwe Saint-Mont.

Haller J.,Nordhausen University of Applied Sciences | Voswinckel S.,Nordhausen University of Applied Sciences | Wesselak V.,Nordhausen University of Applied Sciences
Solar Energy | Year: 2013

Global irradiance spectra vary with location, different viewing angles and times of day, depending on the fraction of direct and diffuse irradiance. Owing to big differences in spectral responses, PV module technologies might therefore show a differing behaviour with varying orientation and tilt angles. The purpose of this work is to verify the thesis, that thin film modules are - due to their spectral response - more suitable for horizontal orientation than crystalline. Diffuse irradiation (except from circumsolar radiation) can be captured best by a horizontal surface and consists to a greater fraction of short wavelengths than direct irradiation. At the same time thin film modules primarily absorb photons of short wavelengths and could therefore be better suited for horizontal application.Based on the semi-empirical spectral model Sedes2 and quantum efficiency data, a model has been developed to analyse differences in optimum orientation of several PV module technologies. In a first step, hourly global irradiance spectra are generated from a 1. year dataset of hourly climate data derived from long-term averages by the Meteonorm database for two sites in different climes. Based on this, average photocurrent densities are computed for each technology and for a matrix of different orientation and tilt angles using quantum efficiency data. Normalised to their maximum, the photocurrent densities are compared between the technologies. The results we obtained show, that for each site the maximum relative photocurrent densities are located at about the same orientation for all technologies, i.e. the optimum orientation is the same. At horizontal orientation, thin film modules show a slightly higher value of normalised average photocurrent densities than monocrystalline modules. Yet, for a whole year this advantage lies below 1% for both sites. © 2012 Elsevier Ltd.

Voswinckel S.,Nordhausen University of Applied Sciences | Wesselak V.,Nordhausen University of Applied Sciences | Lustermann B.,Nordhausen University of Applied Sciences
Solar Energy | Year: 2013

In contrast to crystalline silicon solar modules the parameters of the I-. V-curve cannot directly be extracted by one measured I-. V-curve for amorphous solar modules. Especially the parasitical series and shunt resistance are not comparable to the slope in the short circuit respectively to the open circuit region of the I-. V-curve. This work will show the behaviour of the I-. V-curve of aSi:H solar modules and the influence of the single curve parameters. The influence of the separate parameters of aSi:H solar cells is more difficult to understand than for crystalline silicon. So a parameter study shows the influence of the parameters to the I-. V-curve. A recombination current allows a more sufficient description of the recombination paths under illumination. The so called Merten-Model is sufficient to describe the curves behaviour. But to understand the degradation mechanism a more detailed model is needed. Thereto a second diode in the model allows a more exhaustive study of the degradation mechanism, especially the Staebler-Wronski-Effect. © 2013 Elsevier Ltd.

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