Hochschule Lausitz FH

Senftenberg, Germany

Hochschule Lausitz FH

Senftenberg, Germany
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Reichmann H.,Universitatsklinikum Carl Gustav Carus | Reinhardt F.,Lausitzer Seenland Klinikum | Altmann O.,Lausitzer Seenland Klinikum | Brehme S.,Zentrum fur Neurologie und Schmerztherapie | And 4 more authors.
Aktuelle Neurologie | Year: 2012

Traditional limits of medical fields step back in treating numerous diseases, e.g. in case of a stroke, in favour of a process of thinking. Clinical Pathways, standardized treatment ones, are the basis for such a process-oriented medicine. A clinical pathway named as "Stroke patient within a time frame of 24 h is shown which was developed at the Lausitz University of Applied Sciences and the Lausitz Lakeland Hospital. It has been tested for 3 years now and is based on OPS-Code 8-981 for the first 72 h "Neurological complex treatment of the acute strokeo". This code is fixed in an "Information System Stroke Unit" (IS-SU) which was developed as a co-operational project of the Neurological Hospital of the Dresden Technical University, the Lausitz University of Applied Sciences and the Lausitz Lakeland Hospital. The input surface of the computer represents the treatment pathway in continuous sequence. The IS-SU has a process-controlling and governing function. It forces a stringent case history inquiry, a rational clinical investigation and controls well-chosen para clinical additions. Besides safeguarding the collection of all actual data necessary and also considering concurrent diseases and complications, i.e. the exact process control, the IS-SU enables a structured capture of all findings and selected process data (also 6 h NIHSS). It offers support in finding medical decisions to the physician; e.g. in the case of diagnosis and therapy setting. As part of the launch, at present an established provider is working on the interface questionability concerning common patient information systems. The IS-SU is a potential as an upgrade for a telemedicine integrated system of stroke treatment. It offers additional possibilities for a continuous process regulation and - finally - DRG-accounting control. © Georg Thieme Verlag KG Stuttgart . New York.


Schoder M.,Hochschule Lausitz FH | Armbruster U.,Leibniz Institute for Catalysis at the University of Rostock | Martin A.,Leibniz Institute for Catalysis at the University of Rostock
Chemie-Ingenieur-Technik | Year: 2013

Ni- and Ru-containing supported catalysts were prepared and used for the CO2 hydrogenation to methane (Sabatier reaction) in the gas phase. Tests on the effect of the reaction temperature and pressure were in the focus. ZrO2 and γ-Al2O3 were used as suitable catalyst supports. CO2 and H2 conversions of 70-80 % and selectivity to methane of > 99 % were reached. TiO2 and SiO2 based catalysts exclusively lead to CO and seem to be not suited for this reaction. The investigations on the pressure effect impressively demonstrated the influence on the chemical equilibrium. CO2 and H2 can be nearly completely converted with > 99.9 % selectivity to methane over Ru/ZrO2.Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Osters O.,TU Munich | Nilges T.,TU Munich | Schoneich M.,Hochschule Lausitz FH | Schoneich M.,TU Dresden | And 5 more authors.
Inorganic Chemistry | Year: 2012

The ternary Laves phase Cd 4Cu 7As is the first intermetallic compound in the system Cu-Cd-As and a representative of a new substitution variant for Laves phases. It crystallizes orthorhombically in the space group Pnnm (No. 58) with lattice parameters a = 9.8833(7) Å b = 7.1251(3) Å c = 5.0895(4) Å. All sites are fully occupied within the standard deviations. The structure can be described as typical Laves phase, where Cu and As are forming vertex-linked tetrahedra and Cd adopts the structure motive of a distorted diamond network. Cd 4Cu 7As was prepared from stoichiometric mixtures of the elements in a solid state reaction at 1000 °C. Magnetic measurements are showing a Pauli paramagnetic behavior. During our systematical investigations within the ternary phase triangle Cd-Cu-As the cubic C15-type Laves phase Cd 4Cu 6.9(1)As 1.1(1) was structurally characterized. It crystallizes cubic in the space group Fd3m̄ with lattice parameter a = 7.0779(8) Å. Typically for quasi-binary Laves phases Cu and As are both occupying the 16c site. Chemical bonding, charge transfer and atomic properties of Cd 4Cu 7As were analyzed by band structure, ELF, and AIM calculations. On the basis of the general formula for Laves phases AB 2, Cd is slightly positively charged forming the A substructure, whereas Cu and As represent the negatively charged B substructure in both cases. The crystal structure distortion is thus related to local effects caused by Arsenic that exhibits a larger atomic volume (18 Å 3 compared to 13 Å 3 for Cu) and higher ionicity in bonding. © 2012 American Chemical Society.


Rumiantsev A.,MicroTech | Doerner R.,Ferdinand - Braun - Institute | Lenk F.,Hochschule Lausitz FH
European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012 | Year: 2012

This paper investigates the impact of possible parameter extraction errors caused by inaccurate definition of the calibration reference impedance of in-situ multiline TRL. Two calibration sets implemented on GaAs and Si/SiGe:C wafer processes were quantitatively analyzed. Obtained results demonstrated that for most practical cases' the desired 5%-level of confidence of extracted parameters of high-reflective devices can easily be achieved without additional efforts. Thus' implementation of the in-situ TRL into a characterization workflow of high-performance microwave devices can be significantly simplified. © 2012 EUROPEAN MICROWAVE ASSOC.


Acker J.,Hochschule Lausitz FH | Koschwitz T.,Hochschule Lausitz FH | Meinel B.,Hochschule Lausitz FH | Heinemann R.,Hochschule Lausitz FH | Blocks C.,Hochschule Lausitz FH
Energy Procedia | Year: 2013

Wet chemical etching of multicrystalline Si wafer in mixtures of hydrofluoric (HF) and nitric acid (HNO3) combines the removal of the saw damaged silicon lattice on top of the wafer with the creation of a certain surface morphology (texture) on the surface of the underlying bulk silicon. However, it is yet unclear how the kinetics of silicon etching, the constitution of the saw damage, and the resulting surface morphology are related to each other. As a first step to answer this question the etching of the saw damage was studied at three different levels: (i) The development of the surface morphology was studied with increasing etch depth. Regions of key morphological features were identified and parameters describing the morphological development were derived from the surface topography. (ii) The etch rate was studied as parameter that is very sensitive to changes regarding the bonding state of the etched silicon atoms. (iii) The surface chemistry of HF/HNO3 etched Si wafer was monitored by diffuse reflectance Fourier-transform infrared spectroscopy (DRIFT) in order to identify processes that are related to changes in the surface termination of silicon. By the combination of these three approaches a detailed picture from the etching of the saw damage, the development of the texture, and the interaction between structure and etch rate can be drawn. © 2013 The Authors.


Jost A.,Hochschule Lausitz FH | Neumann E.,Hochschule Lausitz FH | Himmelmann K.-H.,Hochschule Lausitz FH
Current Alzheimer Research | Year: 2010

Processes of demographic change are leading to decreasing human resources in professional as well as lay care; this decrease necessitates new concepts of care, especially for the growing number of people with dementia (p.w.d.). Since the amendment to the German Care Insurance Law (2002), family carers have been entitled to regular weekly relief, provided by volunteers who have been given a thirty-hour-training. As difficulties in information processing in p.w.d. form an important part of the symptoms in dementia sufferers - with a high impact on communication as well as competent functioning in activities associated with daily life -, we wanted to establish how much awareness and sensitivity voluntary attendants show in "tuning in" to the p.w.d. and her/his individual capacity to interact. In an exploratory study the authors analyzed videotaped interactions between volunteer caregivers and dementia-sufferers which were recorded in everyday situations during the process of ongoing care. Using methods of Video Interaction Analysis and Grounded Theory, we developed categories which describe how in tune the helpers are with the timing skills - or lack of them - of p.w.d.. We think that understanding the different ways in which p. w. d. structure their time can improve their communication and interaction. The categories - "speed and adjustment of speed", "mutuality" and "time control" - seemed crucial in understanding the subsequent course of the interactions. In a second step, these categories have recently been used by students and staff of the Lausitz University of Applied Sciences to provide training that sensitizes volunteer attendants to the topic and to learn about volunteers' judgement on the importance of continuing education in this field. © 2010 Bentham Science Publishers Ltd.


Hemp I.,Hochschule Lausitz FH | Gohler L.,Hochschule Lausitz FH | Bonisch S.,Hochschule Lausitz FH
PCIM Europe Conference Proceedings | Year: 2013

A fully automated test set-up is introduced, which permits the measurement of the terminal characteristics of an IGBT module (Insulated Gate Bipolar Transistor module) under different thermal and electrical conditions. Both the transients of the IGBT and the freewheeling diode are investigated separately. Additionally, a generic basic macro model of an IGBT module, which is already implemented in the system simulator Portunus®, has been validated. © VDE VERLAG GMBH · Berlin · Offenbach.


Lenk F.,Hochschule Lausitz FH | Doerner R.,Ferdinand - Braun - Institute | Kurpas P.,Ferdinand - Braun - Institute | Rumiantsev A.,TU Brandenburg
81st ARFTG Microwave Measurement Conference: Metrology for High Speed Circuits and Systems, ARFTG 2013 | Year: 2013

In this paper an analytical derivation of vector network analyzer (VNA) measurement uncertainties due to non-ideal calibration standards for unknown thru calibration (UOSM or UXYZ) is presented. Simple equations for the sensitivity coefficients are obtained. This allows a deep insight into the error propagation mechanism as well as an easy implementation into calibration software. © 2013 IEEE.


Berndt S.,Hochschule Lausitz FH | Mrosk T.,Hochschule Lausitz FH | Doerner R.,Ferdinand - Braun - Institute | Lenk F.,Hochschule Lausitz FH
81st ARFTG Microwave Measurement Conference: Metrology for High Speed Circuits and Systems, ARFTG 2013 | Year: 2013

The uncertainty calculation for on-wafer 1-port S-Parameter measurements due to the uncertainty of coplanar on-chip calibration standards is presented. Analytical expressions for the sensitivities are used and applied for typical fabrication tolerances of monolithic integrated on-chip structures. The method is verified for OSM calibration by means of simulations with a commercial calibration software as well as by measurements, where test-structures with artificial errors were used. In each case the analytically calculated deviation is compared to a numerical approach and good agreement is found. All results are given for a MMIC process on GaAs, but can be adopted for other technologies. © 2013 IEEE.


Porous carbon monoliths have been prepared by template assisted routes using porous concrete as the template. Due to its good workability, porous concrete is a suitable template to produce carbon monoliths with defined shape. The pore widths of the obtained monoliths are distributed over a broad range from the micropore to the macropore region. Such materials are a promising base for developing construction components which can be applied in adsorption devices or catalytic systems. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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