TY - BOOK T1 - Von der Staatlichen Ingenieurschule zur Fachhochschule Münster. 25 Jahre Ingenieurausbildung in Steinfurt N2 - Die Ingenieurausbildung in Steinfurt besteht seit dem Jahr 1963. Die vorliegende Festschrift ist 1988 aus Anlass des 25-jährigen Bestehens erschienen. KW - Ingenieurausbildung KW - Steinfurt KW - Fachhochschule Y1 - 1988 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-777 PB - FH Münster ER - TY - CHAP A1 - Rausch, Peter A1 - Verpoort, Sven A1 - Wittrock, Ulrich T1 - Unimorph piezoelectric deformable mirrors for space telescopes T2 - Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, Proc. SPIE N2 - We have developed, manufactured and tested a unimorph deformable mirror for space applications based on piezoelectric actuation. The mirror was designed for the correction of low-order Zernike modes with a stroke of several tens of micrometers over a clear aperture of 50 mm. It was successfully tested in thermal vacuum, underwent lifetime tests, and was exposed to random vibrations, sinusoidal vibrations, and to ionizing radiation. We report on design considerations, manufacturing of the mirror, and present the test results. Furthermore, we discuss critical design parameters, and how our mirror could be adapted to serve recently proposed space telescopes such as HDST and TALC. Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-9230 VL - 9904 SP - 990468 ER - TY - CHAP A1 - Verpoort, Sven A1 - Wittrock, Ulrich T1 - Unimorph deformable mirror for telescopes and laser applications in space T2 - International Conference on Space Optics (ICSO), Rhodes Island, Greece N2 - Over the past 5 years we have developed a new type of unimorph deformable mirror. The main advantages of this mirror technology are · very low surface scattering due to the use of superpolished glass · excellent coatings, even suitable for high power lasers, can be applied · active diameter of the mirrors can be between 10 mm and 100 mm · large strokes can be achieved even for small mirror diameters · integrated monolithic tip/tilt functionality based on a spiral arm design We have modeled these mirrors by analytical models as well as by the finite element method. This allows us to quickly design new mirrors tailored to specific applications. One example is a mirror for laser applications that has a diameter of 10 mm and can achieve a stroke in defocus mode of 5 μm. The stroke for these mirrors scales as the square of the mirror diameter, meaning that we can achieve, for example, a stroke of 125 μm for a mirror of 50 mm diameter. We will present design criteria and tradeoffs for these mirrors. We characterize our mirrors by the maximum stroke they can deliver for various Zernike modes, under the boundary condition that the Zernike mode has to be created with a certain fidelity, usually defined by the Maréchal criterion. Y1 - 2010 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-6484 UR - www.icsoproceedings.org PB - SPIE ER - TY - JOUR A1 - Rausch, Peter A1 - Verpoort, Sven A1 - Wittrock, Ulrich T1 - Unimorph deformable mirror for space telescopes: environmental testing JF - Opt. Expr. N2 - We have developed and manufactured a unimorph deformable mirror for space telescopes based on piezoelectric actuation. The mirror features 44 actuators, has an aperture of 50 mm, and is designed to reproduce low-order Zernike modes with a stroke of several tens of µm. We assessed the space compliance by operating the mirror in thermal vacuum, and exposing it to random and sinusoidal vibrations, as well as to ionizing irradiation. Additionally, the operational life time and the laser power handling capability were tested. The mirror was successfully operated in thermal vacuum at 100 K. We report on the conducted tests and the methods used to evaluate the mirror´s performance, and discuss the compliance with the demanded requirements KW - active or adaptive optics KW - telescopes thermal effects vibration analysis KW - radiation KW - space optics KW - space instrumentation Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-8530 VL - 24 SP - 1528 EP - 1542 ER - TY - JOUR A1 - Rausch, Peter A1 - Verpoort, Sven A1 - Wittrock, Ulrich T1 - Unimorph deformable mirror for space telescopes: design and manufacturing JF - Opt. Expr. N2 - Large space telescopes made of deployable and lightweight structures suffer from aberrations caused by thermal deformations, gravitational release, and alignment errors which occur during the deployment procedure. An active optics system would allow on-site correction of wave-front errors, and ease the requirements on thermal and mechanical stability of the optical train. In the course of a project funded by the European Space Agency we have developed and manufactured a unimorph deformable mirror based on piezoelectric actuation. The mirror is able to work in space environment and is designed to correct for large aberrations of low order with high surface fidelity. This paper discusses design, manufacturing and performance results of the deformable mirror. KW - Active or adaptive optics KW - Telescopes KW - Space optics KW - Space instrumentation Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-8227 VL - 23 SP - 19469 EP - 19477 ER - TY - GEN A1 - Glösekötter, P. T1 - Ultimas tendencias en sistemas empotrados N2 - Ultimas tendencias en sistemas empotrados Y1 - 2013 U6 - http://dx.doi.org/10.25974/fhms-710 PB - FH Münster ER - TY - CHAP A1 - Gellenbeck, Klaus T1 - Trends of changes in waste management and possible optimizations within the waste collection process T2 - Zbornik 3. Problemske Konference Komunalnega Gospodarstva N2 - 1. General waste management in Europe 2. Optimization process of disposal logistics a. Technologies (collection systems, vehicles etc.) b. Benchmarking c. Optimization 3. The future and sustainability of waste management KW - Abfallmanagement KW - Abfall KW - waste management KW - waste collection Y1 - 2013 U6 - http://dx.doi.org/10.25974/fhms-705 PB - GZS CY - Ljubljana ER - TY - JOUR A1 - Gellenbeck, Klaus T1 - TOP-Kennzahlen zur Standortbestimmung für die Abfallwirtschaft und Stadtreinigung - 8. Durchgang zum VKU-Benchmarking startet im Frühjahr 2012 JF - VKS-News N2 - Die anhaltende Diskussion um Wirtschaftlichkeit, Leistungsfähigkeit und Qualität der Dienstleistung veranlasst zunehmend mehr Abfallwirtschaft- und Stadtreinigungsbetreibe sich mit der Frage auseinanderzusetzen, " Wo steht mein Betreib im Vergleich zu anderen und wie muss ich mich als Betrieb positionieren?". Erst Antworten hierzu kann u. A. auch eine Teilnahme an einem brancheninternen Benchmarking-Verfahren liefern. KW - Kennzahl KW - Abfallwirtschaft KW - Stadtreinigung Y1 - 2012 U6 - http://dx.doi.org/10.25974/fhms-687 PB - VKU-Verlag ET - 161 ER - TY - RPRT A1 - Mohn, Rainer A1 - Gardemann, Joachim T1 - TAWI: Die Tigray und Afar Wasser Initiative: Malaria-Kontrolle in der Wasserversorgung im Norden Äthiopiens. Ein gemeinnütziges Forschungs- und Entwicklungsprojekt der Fachhochschule Münster N2 - Die Tigray and Afar Wasser Initiative (TAWI) ist ein Kooperationsprojekt der Mekelle Universität (Äthiopien), der Fachhochschule Münster und der Westfälischen Wilhelms-Universität Münster. Gegenstand der Initiative ist die Wasserversorgung im ländlichen Raum der besonders wasserarmen Regionalstaaten Tigray und Afar im semi-ariden Norden Äthiopiens. Im Untergrund ist häufig noch Wasser zu finden, das gelegentlich auch von Menschen zu landwirtschaftlichen Zwecken extensiv genutzt wird. Dichtwände im Untergrund können dazu dienen, diese Nutzung zu intensivieren und zusätzlich den Landschafts-Wasserhaushalt positiv zu beeinflussen. Die so aufgestauten unterirdischen Wasserspeicher sollen als kleine bzw. kleinste Anlagen dezentral die Versorgungslage kleiner, lokaler Bevölkerungsgruppen verbessern. Gleichzeitig vermeidet die unterirdische Speicherung die Gefahr einer Erhöhung der Inzidenzrate für beispielsweise Malaria, wie sie infolge von oberirdisch angelegten Ponds nachgewiesen worden ist. N2 - The Tigray and Afar Water Initiative (TAWI) is a cooperation project of the Mekelle University (Ethiopia), the Muenster University of Applied Sciences (Germany) and the Westphalian Wilhelms-University Muenster (Germany). Subject of the initiative is the rural water supply for the specifically water-scarce regional states Tigray and Afar in the semi-arid north of Ethiopia. The here reported project deals with river reaches or creeks that carry water only for short time spans after longer rainfall periods in the longer of two rainy seasons. In the underground of these rivers often there is still water to be found, that is used casually by local people for agricultural purposes. Tight walls in the underground could serve to intensify this usage and additionally influence the landscape water balance positively. The so retained subsurface micro-reservoirs should serve to enhance the supply of small local user-groups locally. Storing water in micro-storages in the underground also avoids the danger of increasing the incidence of e.g. Malaria, an effect of open water ponds that has been proofed scientifically. KW - Malaria KW - Äthiopien KW - Staudamm KW - Wasserspeicher KW - sub surface dam Y1 - 2010 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-4635 PB - FH Münster ER - TY - CHAP A1 - Durand, G. A1 - Amiaux, J. A1 - Sauvage, M. A1 - Austin, J. A1 - Chesne, S. A1 - Collette, C. A1 - Helgouashl, S. A1 - Pareschi, J. A1 - Penfornis, Y. A1 - Valsecchi, G. A1 - Wittrock, U. T1 - TALC a far-infrared 20m space telescope and the ELICSIR consortium to reach TRL 3 T2 - Proceedings of the 37th ESA Antenna Workshop, Noordwijk, Netherlands N2 - Further space exploration in the far-infrared (FIR) requires larger apertures in order to improve the spatial resolution of captured images. To this purpose, the Thinned Aperture Light Collector (TALC) concept of a deployable annular telescope has been recently developed at CEA, which offers novel perspectives for FIR space missions. The consortium ELICSIR consortium of European institutes and companies has been created to improve the technological readiness level (TRL) of its key systems and components. Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-9253 UR - http://esaconferencebureau.com/2016-events/16c18/introduction ER -