TY - CHAP A1 - Meliß, Michael A1 - Späte, Frank A1 - Lange, Harald T1 - The Solar-Campus Jülich - an interdisciplinary project T2 - Building a new century. 5th Conference on Solar Architecture and Design, Bonn, 27th of May 1998. Ed. by Eurosolar e.V. Ed. by Irm Pontenagel. Y1 - 1999 SN - 3-933745-03-9 SP - 382 EP - 387 PB - Eurosolar-Verl. CY - Bonn ER - TY - CHAP A1 - Meliß, Michael A1 - Späte, Frank T1 - Solar-Campus Jülich - an interdisciplinary project T2 - EuroSun '96 ; 10. Internationales Sonnenforum : proceedings. Bd 3 Y1 - 1996 SP - 1281 EP - 1285 PB - DGS-Sonnenenergie CY - München ER - TY - CHAP A1 - Späte, Frank A1 - Hafner, B. A1 - Schwarzer, Klemens T1 - A system for solar process heat for decentralized applications in developing countries T2 - ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3 Y1 - 2000 SN - 0-080-043895-4 SP - 236 EP - 291 PB - Elsevier CY - Oxford ER - TY - CHAP A1 - Kroker, Jan A1 - Hoffschmidt, Bernhard A1 - Schwarzer, Klemens A1 - Späte, Frank T1 - PTC 1000 modular parabolic trough collector T2 - Process heat collectors : state of the art within task 33/IV ; IEA SHC-Task 33 and SolarPACES-Task IV: Solar heat for industrial processes : Förderkennzeichen BMBF 0329273A / Solar Heating and Cooling Executive Committee of the International Energy Agency (IEA) ; ed. Werner Weiss Y1 - 2008 SP - 45 EP - 46 PB - AEE INTEC CY - Gleisdorf ER - TY - CHAP A1 - Hoffschmidt, Bernhard A1 - Schwarzer, Klemens A1 - Späte, Frank A1 - Kötter, Jens A1 - Ebert, Miriam A1 - Sierck, Olaf T1 - Development of a small modular parabolic trough collector T2 - 13th International Symposium Concentrated Solar Power and Chemical Energy Technologies : SolarPaces : June 20 - 23, 2006, Seville, Spain Y1 - 2006 SN - 8478345191 PB - SolarPaces CY - [o.O.] ER - TY - CHAP A1 - Dylla, Frank A1 - Ferrein, Alexander A1 - Lakemeyer, Gerhard T1 - AllemaniACs 2003 team description T2 - RoboCup 2003 : Robot Soccer World Cup VII Y1 - 2003 SP - 1 EP - 3 ER - TY - JOUR A1 - Weemstra, Monique A1 - Eilmann, Britta A1 - Sass-Klaassen, Ute G. W. A1 - Sterck, Frank J. T1 - Summer droughts limit tree growth across 10 temperate species on a productive forest site JF - Forest Ecology and Management Y1 - 2013 U6 - http://dx.doi.org/doi:10.1016/j.foreco.2013.06.007 SN - 0378-1127 (Print) SN - 1872-7042 (Online) VL - 2013 IS - 306 SP - 142 EP - 149 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Eilmann, Britta A1 - Sterck, Frank J. A1 - Wegner, L. A1 - de Vries, Sven M. G. A1 - von Arx, G. A1 - Mohren, Godefridus M. J. A1 - den Ouden, Jan A1 - Sass-Klaassen, Ute G. W. T1 - Wood structural differences between northern and southern beech provenances growing at a moderate site JF - Tree Physiology Y1 - 2014 U6 - http://dx.doi.org/10.1093/treephys/tpu069 SN - 1758-4469 (Online) SN - 0829-318X (Print) VL - 34 IS - 8 SP - 882 EP - 893 PB - Oxford University Press CY - Oxford ER - TY - CHAP A1 - Kern, Alexander A1 - Krichel, Frank A1 - Müller, Klaus-Peter T1 - Lightning protection design of a renewable energy hybrid-system without power mains connection N2 - In the year 2000 a direct lightning strike to the hybridsystem without power mains connection VATALI on the Greek island Crete results in the destruction and damage of some mechanical and electrical components. The hybrid-system VATALI was not lightning protected at that time. The hardware damage costs are approx. 60,000 €. The exposed site of the hybrid-system on top of a mountain was and still is the reason for a high risk of lightning strikes. Also in the future further lightning strikes have to be taken into consideration. In the paper a fundamental lightning protection design concept for renewable energy hybrid-systems without power mains connection and protection measures against direct strikes and overvoltages are shown in detail. The design concept was realized exemplarily for the hybrid-system VATALI. The hardware costs for the protection measures were about 15,000 €. About 50% of the costs are due to protection measures against direct strikes, 50% are due to overvoltage protection. Future extensions, new installations, or modifications have to be included into the lightning protection design concept of the hybrid-system. KW - Blitzschutz KW - Erneuerbare Energien KW - Hybridsystem KW - Lightning protection KW - Renewable energy KW - hybrid-system Y1 - 2001 ER - TY - CHAP A1 - Kern, Alexander A1 - Krichel, Frank T1 - Considerations about the lightning protection system of mains independent renewable energy hybrid-systems - practical experiences N2 - In the paper a lightning protection design concept for renewable energy hybrid-systems without power mains connection is described. Based on a risk analysis protection measures against direct strikes and overvoltages are shown in an overview. The design concept is realized exemplarily for the hybrid-system VATALI on the Greek island Crete. VATALI, not lightning protected at that time, was a victim of a lightning strike in the year 2000 causing destructions and damages of some mechanical and electrical components with costs of approx. 60.000 €. The hardware costs for the protection measures were about 15.000 €: about 50% of the costs are due to protection measures against direct strikes, 50% are due to overvoltage protection. KW - Blitzschutz KW - Erneuerbare Energien KW - Hybridsystem KW - Photovoltaikanlage KW - Windenergieanlage KW - Lightning protection KW - renewable energy KW - hybrid system KW - photovoltaic system KW - wind turbine Y1 - 2002 ER - TY - JOUR A1 - Bouwman, Peter A1 - Gulden, Hanneke van der A1 - Heijden, Ingrid van der A1 - Drost, Rinske A1 - Klijn, Christiaan N. A1 - Prasetyanti, Pramudita A1 - Pieterse, Mark A1 - Wientjens, Ellen A1 - Seibler, Jost A1 - Hogervorst, Frank B. L. A1 - Jonkers, Jos T1 - A High-Throughput Functional Complementation Assay for Classification of BRCA1 Missense Variants JF - Cancer Discovery Y1 - 2013 U6 - http://dx.doi.org/10.1158/2159-8290.CD-13-0094 SN - 2159-8290 IS - 3 SP - 1142 EP - 1152 ER - TY - JOUR A1 - Delle, Lotta E. A1 - Huck, Christina A1 - Bäcker, Matthias A1 - Müller, Frank A1 - Grandthyll, Samuel A1 - Jacobs, Karin A1 - Lilischkis, Rainer A1 - Vu, Xuan T. A1 - Schöning, Michael Josef A1 - Wagner, Patrick A1 - Thoelen, Roland A1 - Weil, Maryam A1 - Ingebrandt, Sven T1 - Impedimetric immunosensor for the detection of histamine based on reduced graphene oxide JF - Physica status solidi (a) Y1 - 2015 U6 - http://dx.doi.org/10.1002/pssa.201431863 SN - 1862-6319 VL - 212 IS - 6 SP - 1327 EP - 1334 PB - Wiley CY - Weinheim ER - TY - CHAP A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Orifici, Adrian C. T1 - Operational modal analysis of a cantilever in a wind tunnel using optical fiber bragg grating sensors T2 - 6th International Operational Modal Analysis Conference. IOMAC´15. 2015 May 12-14 Gijon - Spain Y1 - 2015 U6 - http://dx.doi.org/10.13140/RG.2.1.3753.0324 ER - TY - JOUR A1 - Bindal, Gaurav A1 - Sharma, Sparsh A1 - Janser, Frank A1 - Neu, Eugen T1 - Detailed analysis of variables affecting wing kinematics of bat flight JF - SAE International Journal of Aerospace Y1 - 2013 U6 - http://dx.doi.org/10.4271/2013-01-9003 SN - 1946-3901 VL - 6 IS - 2 SP - 811 EP - 818 ER - TY - CHAP A1 - Nakagawa, Masaki A1 - Michaux, Frank A1 - Kallweit, Stephan A1 - Maeda, Kazuhiro T1 - Unsteady flow measurements in the wake behind a wind-tunnel car model by using high-speed planar PIV T2 - 11TH International Symposium on Particle Image Velocimetry – PIV15 Santa Barbara, California, September 14-16, 2015 N2 - This study investigates unsteady characteristics of the wake behind a 28%-scale car model in a wind tunnel using highspeed planar particle image velocimetry (PIV). The car model is based on a hatchback passenger car that is known to have relatively high fluctuations in its aerodynamic loads. This study primarily focuses on the lateral motion of the flow on the horizontal plane to determine the effect of the flow motion on the straight-line stability and the initial steering response of the actual car on a track. This paper first compares the flow fields in the wake behind the above mentioned model obtained using conventional and high-speed planar PIV, with sampling frequencies of 8 Hz and 1 kHz, respectively. Large asymmetrically coherent flow structures, which fluctuate at frequencies below 2 Hz, are observed in the results of highspeed PIV measurements, whereas conventional PIV is unable to capture these features of the flow owing to aliasing. This flow pattern with a laterally swaying motion is represented by opposite signs of cross-correlation coefficients of streamwise velocity fluctuations for the two sides of the car model. Effects of two aerodynamic devices that are known to reduce the fluctuation levels of the aerodynamic loads are then extensively investigated. The correlation analyses reveal that these devices indeed reduce the fluctuation levels of the flow and the correlation values around the rear combination-lamp, but it is found that the effects of these devices are different around the c-pillar. Y1 - 2015 ER - TY - CHAP A1 - Chudoba, Rostislav A1 - Butenweg, Christoph A1 - Pfeiffer, Frank T1 - Textile reinforced concrete. Part I: Process model for collaborative research and development T2 - Digital proceedings / IKM 2003, proceedings 16th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering [Elektronische Ressource : 10. - 12. Juni 2003, Weimar] / Bauhaus-Universität Weimar. Ed.: K. Gürlebeck; L. Hempel; C. Könke Y1 - 2003 SP - 1 EP - 8 PB - IKM CY - Weimar ER - TY - JOUR A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Braun, Carsten A1 - Orifici, Adrian C. T1 - Operational Modal Analysis of a wing excited by transonic flow JF - Aerospace Science and Technology N2 - Operational Modal Analysis (OMA) is a promising candidate for flutter testing and Structural Health Monitoring (SHM) of aircraft wings that are passively excited by wind loads. However, no studies have been published where OMA is tested in transonic flows, which is the dominant condition for large civil aircraft and is characterized by complex and unique aerodynamic phenomena. We use data from the HIRENASD large-scale wind tunnel experiment to automatically extract modal parameters from an ambiently excited wing operated in the transonic regime using two OMA methods: Stochastic Subspace Identification (SSI) and Frequency Domain Decomposition (FDD). The system response is evaluated based on accelerometer measurements. The excitation is investigated from surface pressure measurements. The forcing function is shown to be non-white, non-stationary and contaminated by narrow-banded transonic disturbances. All these properties violate fundamental OMA assumptions about the forcing function. Despite this, all physical modes in the investigated frequency range were successfully identified, and in addition transonic pressure waves were identified as physical modes as well. The SSI method showed superior identification capabilities for the investigated case. The investigation shows that complex transonic flows can interfere with OMA. This can make existing approaches for modal tracking unsuitable for their application to aircraft wings operated in the transonic flight regime. Approaches to separate the true physical modes from the transonic disturbances are discussed. Y1 - 2016 U6 - http://dx.doi.org/10.1016/j.ast.2015.11.032 SN - 1270-9638 VL - 49 SP - 73 EP - 79 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Nakagawa, Masaki A1 - Kallweit, Stephan A1 - Michaux, Frank A1 - Hojo, Teppei T1 - Typical Velocity Fields and Vortical Structures around a Formula One Car, based on Experimental Investigations using Particle Image Velocimetry T2 - SAE International Journal of Passenger Cars - Mechanical Systems Y1 - 2016 U6 - http://dx.doi.org/10.4271/2016-01-1611 SN - 1946-4002 ER - TY - JOUR A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Orifici, Adrian C. T1 - Fully Automated Operational Modal Analysis using multi-stage clustering JF - Mechanical Systems and Signal Processing Y1 - 2017 U6 - http://dx.doi.org/10.1016/j.ymssp.2016.07.031 SN - 0888-3270 VL - Vol. 84, Part A SP - 308 EP - 323 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Orifici, Adrian C. T1 - Automated modal parameter-based anomaly detection under varying wind excitation JF - Structural Health Monitoring N2 - Wind-induced operational variability is one of the major challenges for structural health monitoring of slender engineering structures like aircraft wings or wind turbine blades. Damage sensitive features often show an even bigger sensitivity to operational variability. In this study a composite cantilever was subjected to multiple mass configurations, velocities and angles of attack in a controlled wind tunnel environment. A small-scale impact damage was introduced to the specimen and the structural response measurements were repeated. The proposed damage detection methodology is based on automated operational modal analysis. A novel baseline preparation procedure is described that reduces the amount of user interaction to the provision of a single consistency threshold. The procedure starts with an indeterminate number of operational modal analysis identifications from a large number of datasets and returns a complete baseline matrix of natural frequencies and damping ratios that is suitable for subsequent anomaly detection. Mahalanobis distance-based anomaly detection is then applied to successfully detect the damage under varying severities of operational variability and with various degrees of knowledge about the present operational conditions. The damage detection capabilities of the proposed methodology were found to be excellent under varying velocities and angles of attack. Damage detection was less successful under joint mass and wind variability but could be significantly improved through the provision of the currently encountered operational conditions. Y1 - 2016 U6 - http://dx.doi.org/10.1177/1475921716665803 SN - 1475-9217 VL - 15 IS - 6 SP - 1 EP - 20 PB - Sage CY - London ER -