TY  - JOUR
A1  - Staat, Manfred
T1  - Local and global collapse pressure of longitudinally flawed pipes and cylindrical vessels
N2  - Limit loads can be calculated with the finite element method (FEM) for any component, defect geometry, and loading. FEM suggests that published long crack limit formulae for axial defects under-estimate the burst pressure for internal surface defects in thick pipes while limit loads are not conservative for deep cracks and for pressure loaded crack-faces. Very deep cracks have a residual strength, which is modelled by a global collapse load. These observations are combined to derive new analytical local and global collapse loads. The global collapse loads are close to FEM limit analyses for all crack dimensions.
KW  - Finite-Elemente-Methode
KW  - Grenzwertberechnung
KW  - Axialbelastung
KW  - FEM
KW  - Grenzwertberechnung
KW  - Axialbelastung
KW  - Traglastanalyse
KW  - Limit analysis
KW  - Global and local collapse
KW  - Axially cracked pipe
KW  - Pressure loaded crack-face
Y1  - 2005
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Direct finite element route for design-by-analysis of pressure components
N2  - In the new European standard for unfired pressure vessels, EN 13445-3, there are two approaches for carrying out a Design-by-Analysis that cover both the stress categorization method (Annex C) and the direct route method (Annex B) for a check against global plastic deformation and against progressive plastic deformation. This paper presents the direct route in the language of limit and shakedown analysis. This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for mechanical and thermal actions. One observation from the examples is that the so-called 3f (3Sm) criterion fails to be a reliable check against progressive plastic deformation. Precise conditions are given, which greatly restrict the applicability of the 3f criterion.
KW  - Einspielen <Werkstoff>
KW  - Plastizität
KW  - Deformation
KW  - Analytischer Zulaessigkeitsnachweis
KW  - Einspiel-Analyse
KW  - fortschreitende plastische Deformation
KW  - alternierend Verformbarkeit
KW  - Einspiel-Kriterium
KW  - Design-by-analysis
KW  - Shakedown analysis
KW  - Progressive plastic deformation
KW  - Alternating plasticity
KW  - Shakedown criterion
Y1  - 2005
ER  - 
TY  - GEN
A1  - Gebhardt, Andreas
T1  - Short course on rapid prototyping
N2  - Rapid Prototyping Technology: Types of models, rapid prototyping processes, prototyper Fundamentals of rapid prototyping Industrial rapid prototyping technology: Stereolithography, (Selective) laser sintering ((S)LS), Layer laminate manufacturing (LLM), Fused layer modeling (FLM), Three dimensional printing (3DP)
KW  - Rapid Prototyping
KW  - Rapid Prototyping
Y1  - 2005
ER  - 
TY  - CHAP
A1  - Brüssermann, Klaus
T1  - Platform of Excellence in "Energy and Environment"
N2  - The Ministry of Science and Research in North Rhine-Westphalia created eight platforms of excellence, one in the research area „Energy and Environment“ in 2002 at ACUAS. This platform concentrates the research and development of 13 professors in Jülich and Aachen and of two scientific institutes with different topics: – NOWUM-Energy with emphasis on efficient and economic energy conversion – The Solar Institute Jülich – SIJ – being the largest research institute in the field of renewables at a University of Applied Sciences in Germany With this platform each possible energy conversion – nuclear, fossil, renewable- can be dealt with to help solving the two most important problems of mankind, energy and potable water. At the CSE are presented the historical development, some research results and the combined master studies in „Energy Systems“ and „Nuclear Applications“
KW  - Energietechnik
KW  - Kernenergie
KW  - Umwelt
KW  - Energy
KW  - environment
KW  - Energy Systems
KW  - Nuclear Applications
Y1  - 2005
ER  - 
TY  - CHAP
A1  - Brüssermann, Klaus
A1  - Deuster, M.
T1  - Temperature measurement to optimise the burning process
N2  - One of the most important parameters in a burning chamber - in power stations, in waste to energy plants - is the temperature. This temperature is in the range of 700-1500 °C - one of the most advanced measuring methods being the acoustic pyrometry with the possibility of producing temperature mapping in one level of the burning chamber - comparable to computer tomography. The results of these measurements discussed in the presentation can be used - to fulfil the legal requirements in the FRG or in the EU - to equalise the temperature in one level of the burning chamber to optimise the steam production (better efficiency of the plant) and to minimise the production of temperature controlled flue gas components (NO, CO a. o.) - to control the SNCR-process if used.
KW  - Pyrometrie
KW  - Temperaturmessung
KW  - temperature measurement
KW  - acoustic pyrometry
KW  - steam production
KW  - flue gas components
Y1  - 2005
ER  - 
TY  - CHAP
A1  - Vedral, Andreas
A1  - Wollert, Jörg
T1  - Service based Bluetooth dual-hop networks using CORBA
T2  - Proceedings of the IASTED International Conference on Artificial Intelligence and Applications : as part of the 23rd IASTED International Multi-Conference on Applied Informatics ; February 14 - 16, 2005, Innsbruck, Austria
Y1  - 2005
SN  - 0-88986-457-8
SP  - 724
EP  - 728
PB  - Acta Pr.
CY  - Anaheim, Calif.
ER  - 
TY  - JOUR
A1  - Seibler, Jost
A1  - Küter-Luks, Birgit
A1  - Kern, Heidrun
A1  - Streu, Sandra
A1  - Plum, Leona
A1  - Maurer, Jan
A1  - Kühn, Ralf
A1  - Brüning, Jens C.
A1  - Schwenk, Frieder
T1  - Single copy shRNA configuration for ubiquitous gene knockdown in mice
JF  - Nucleic Acids Research
Y1  - 2005
U6  - http://dx.doi.org/10.1093/nar/gni065
SN  - 1362-4962
VL  - 33
IS  - 7
SP  - e67
ER  - 
TY  - JOUR
A1  - Goetze, Sandra
A1  - Baer, Alexandra
A1  - Winkelmann, Silke
A1  - Nehlsen, Kristina
A1  - Seibler, Jost
A1  - Maass, Karin
A1  - Bode, Jürgen
T1  - Performance of genomic bordering elements at predefined genomic loci
JF  - Molecular and Cellular Biology
Y1  - 2005
U6  - http://dx.doi.org/10.1128/MCB.25.6.2260-2272.2005
SN  - 1098-5549
VL  - 25
IS  - 6
SP  - 2260
EP  - 2272
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Schellschmidt, R.
A1  - Popov, Y. A.
A1  - Clauser, C.
A1  - Kukkonen, I. T.
A1  - Nover, G.
A1  - Milanovsky, S.
A1  - Romushkevich, R. A.
T1  - New heat flow data from the immediate vicinity of the Kola super-deep borehole: Vertical variation in heat flow density confirmed and attributed to advection
JF  - Tectonophysics
Y1  - 2005
U6  - http://dx.doi.org/10.1016/j.tecto.2005.03.005
SN  - 1879-3266
VL  - 401
IS  - 1-2
SP  - 119
EP  - 142
ER  - 
TY  - CHAP
A1  - Rochefort, E. de
A1  - Verver, M.
A1  - Grunendahl, A.
A1  - Mooi, H.
A1  - Butenweg, Christoph
T1  - Detailed modelling of the lumbar spine for investigation of low back pain
T2  - Digital Human Modeling for Design and Engineering Symposium : Iowa City, Iowa June 14-16, 2005. (SAE technical papers series ; 2005-1-2716)
Y1  - 2005
U6  - http://dx.doi.org/10.4271/2005-01-2716
SN  - 0096-736X
SP  - 1
EP  - 11
PB  - SAE International
CY  - Warrendale, Pa.
ER  - 
TY  - JOUR
A1  - Rochefort, E. de
A1  - Verver, M.
A1  - Grunendahl, A.
A1  - Mooi, H.
A1  - Butenweg, Christoph
T1  - Detailed modelling of the lumbar spine for investigations of low back pain
JF  - SAE transactions : papers presented at Society and Section meetings / Society of Automotive Engineers
Y1  - 2005
SN  - 0096-736X
VL  - Volume 114
IS  - Part 7
SP  - 788
EP  - 796
ER  - 
TY  - CHAP
A1  - Gömmel, Andreas
A1  - Butenweg, Christoph
A1  - Kob, Malte
T1  - Towards a complete finite-element model of human phonation: modeling phonatory maneuvers
T2  - 12th Workshop on the Finite Element Method in Biomedical Engineering, Biomechanics and Related Fields : Ulm, Germany, 20 - 21 July 2005 / University of Ulm, Department of Orthodontics ...
Y1  - 2005
SN  - 978-3-9806183-8-0
PB  - Univ., Dep. of Orthodontics
CY  - Ulm
ER  - 
TY  - CHAP
A1  - Karimi, Iman
A1  - Butenweg, Christoph
A1  - Toll, Britta
T1  - Vulnerability assessment of industrial facilities
T2  - Proceedings of the Tenth International Conference on Civil, Structural and Environmental Engineering Computing : [Rome, Italy, 30. August - 2. September 2005] / ed. by B. H. V. Topping
Y1  - 2005
SN  - 1-905088-00-0
U6  - http://dx.doi.org/10.4203/ccp.81.34
SP  - 34, 73
EP  - 75
PB  - Civil-Comp Press
CY  - Stirling
ER  - 
TY  - CHAP
A1  - Mistler, Michael
A1  - Butenweg, Christoph
T1  - A seismic design procedure for masonry buildings
T2  - Proceedings of the Tenth International Conference on Civil, Structural and Environmental Engineering Computing : [Rome, Italy, 30. August - 2. September 2005] / ed. by B. H. V. Topping
Y1  - 2005
SN  - 1-905088-00-0
U6  - http://dx.doi.org/10.4203/ccp.81.193
SP  - 465
EP  - 467
PB  - Civil-Comp Press
CY  - Stirling
ER  - 
TY  - CHAP
A1  - Renault, Philippe
A1  - Butenweg, Christoph
A1  - Mistler, Michael
T1  - Seismic vulnerability assessment system for bridges
T2  - Proceedings of the Tenth International Conference on Civil, Structural and Environmental Engineering Computing : [Rome, Italy, 30. August - 2. September 2005] / ed. by B. H. V. Topping
Y1  - 2005
SN  - 1-905088-00-0
SP  - 1
EP  - 14
PB  - Civil-Comp Press
CY  - Stirling
ER  - 
TY  - CHAP
A1  - Grunendahl, A.
A1  - de Rochefort, E.
A1  - Butenweg, Christoph
T1  - Numerical models for investigating the causes of low back pain due to whole-body vibrations
T2  - 2nd International Conference on Computational Bioengineering : Lisbon, September 14-16 2005. Volume 2.
Y1  - 2005
SN  - 978-972-8469-37-3
SP  - 905
EP  - 914
PB  - IST Press
CY  - Lisbon
ER  - 
TY  - CHAP
A1  - Kalker, Ines
A1  - Neumann, M.
A1  - Butenweg, Christoph
A1  - Holler, Stefan
T1  - Modelling of textile strengthened masonry
T2  - Proceedings of the Tenth International Conference on Civil, Structural and Environmental Engineering Computing : [Rome, Italy, 30. August - 2. September 2005] / ed. by B. H. V. Topping
Y1  - 2005
SN  - 1-905088-00-0
U6  - http://dx.doi.org/10.4203/ccp.81.184
SP  - 447
EP  - 448
PB  - Civil-Comp Press
CY  - Stirling
ER  - 
TY  - CHAP
A1  - Gömmel, Andreas
A1  - Krämer, Sebastian
A1  - Butenweg, Christoph
A1  - Kob, Malte
T1  - A combined FE and multiple-mass model for numerical simulation of phonatory maneuvers
T2  - Proceedings / Forum Acusticum, Budapest, 29 Aug - 2 Sep, 2005 : [Acoustics: science and technology for knowledge based society and healthy environment] / ed. by: Fülöp Augusztinovicz ...
Y1  - 2005
SN  - 978-963-8241-68-9
SP  - 2759
EP  - 2764
PB  - OPAKFI Tud. Egyesület
CY  - Budapest
ER  - 
TY  - CHAP
A1  - Renault, Philippe
A1  - Butenweg, Christoph
T1  - Seismic vulnerability assessment of bridges
T2  - First Munich Bridge Assessment Conference, MBAC 2005 : Munich, 20.-25. June 2005
Y1  - 2005
SP  - 1
EP  - 16
ER  - 
TY  - CHAP
A1  - Bitz, Andreas
A1  - El Ouardi, A.
A1  - Streckert, J.
A1  - Hansen, V.
T1  - Efficient calculation of human exposure in front of base station antennas by a combination of the FDTD and Hybrid(2)-method
T2  - Proceedings of the 16th International Zurich Symposium on Electromagnetic Compatibility, Topical Meeting on Biomedical EMC, Zurich, Switzerland, February 2005
Y1  - 2005
SN  - 3-9521199-9-7
SP  - 115
EP  - 118
PB  - ETH Zentrum
CY  - Zürich
ER  - 
TY  - JOUR
A1  - Franke, Helmut
A1  - Streckert, Joachim
A1  - Bitz, Andreas
A1  - Goeke, Johannes
A1  - Hansen, Volkert
A1  - Ringelstein, E. Bernd
A1  - Nattkämper, Heiner
A1  - Galle, Hans-Joachim
A1  - Stögbauer, Florian
T1  - Effects of Universal Mobile Telecommunications System (UMTS) electromagnetic fields on the blood-brain barrier in vitro
JF  - Radiation Research
Y1  - 2005
U6  - http://dx.doi.org/10.1667/RR3424.1
SN  - 1938-5404
VL  - 164
IS  - 3
SP  - 258
EP  - 269
ER  - 
TY  - JOUR
A1  - Wissen, M.
A1  - Bogdanski, N.
A1  - Scheer, H.-C.
A1  - Bitz, Andreas
A1  - Ahrens, G.
A1  - Gruetzner, G.
T1  - Implication of the light polarisation for UV curing of pre-patterned resists
JF  - Microelectronic Engineering
Y1  - 2005
U6  - http://dx.doi.org/10.1016/j.mee.2004.12.099
SN  - 0167-9317
VL  - 78-79
SP  - 659
EP  - 664
ER  - 
TY  - JOUR
A1  - Braband, Henrik
A1  - Yegen, Eda
A1  - Paulßen, Elisabeth
A1  - Abram, Ulrich
T1  - [{ReN(PMe2Ph)3}{ReO3N}]2 – Structural Evidence for the Nitridotrioxorhenate(VII) Anion, [ReO3N]2−
JF  - Zeitschrift für anorganische und allgemeine Chemie : ZAAC = Journal of inorganic and general chemistry
Y1  - 2005
U6  - http://dx.doi.org/10.1002/zaac.200500240
SN  - 1521-3749
VL  - 631
IS  - 12
SP  - 2408
EP  - 2410
ER  - 
TY  - CHAP
A1  - Hammer, Andreas
A1  - Vieth, Matthias
A1  - Maier, Frank
T1  - Co-Plot as a new multivariate analysis method for operations management research?
T2  - Papers of the 12th International EurOMA Conference on Operational and Global Competitiveness, Budapest, Hungary, June 19-22, 2005 / Editor: Krisztina Demeter
Y1  - 2005
SN  - 963-218-455-6
SP  - 1007
EP  - 1016
ER  - 
TY  - RPRT
A1  - Vieth, Matthias
A1  - Hammer, A.
A1  - Maier, F.
T1  - A critical analysis of the co-plot method
T2  - International University in Germany, School of Business Administration / Working paper
Y1  - 2005
IS  - 32
PB  - School of Business Administration, Intern. Univ. in Germany
CY  - Bruchsal
ER  - 
TY  - CHAP
A1  - Kunfermann, Philipp
A1  - Drumm, Christian
T1  - Lifting XML schemas to ontologies - the concept finder algorithm
T2  - MEDIATE 2005 First International Workshop on Mediation in Semantic Web Services    Proceedings of the First International Workshop on Mediation in Semantic Web Services (MEDIATE 2005)
Y1  - 2005
SP  - 113
EP  - 122
ER  - 
TY  - CHAP
A1  - Dachwald, Bernd
T1  - Global optimization of low-thrust space missions using evolutionary neurocontrol
T2  - Proceedings of the international workshop on global optimization
N2  - Low-thrust space propulsion systems enable flexible high-energy deep space missions, but the design and optimization of the interplanetary transfer trajectory is usually difficult. It involves much experience and expert knowledge because the convergence behavior of traditional local trajectory optimization methods depends strongly on an adequate initial guess. Within this extended abstract, evolutionary neurocontrol, a method that fuses artificial neural networks and evolutionary algorithms, is proposed as a smart global method for low-thrust trajectory optimization. It does not require an initial guess. The implementation of evolutionary neurocontrol is detailed and its performance is shown for an exemplary mission.
KW  - Evolutionary Neurocontrol
KW  - Spacecraft Trajectory Optimization
KW  - Low-Thrust Propulsion
Y1  - 2005
SP  - 85
EP  - 90
ER  - 
TY  - CHAP
A1  - Dachwald, Bernd
A1  - Baturkin, Volodymyr
A1  - Coverstone, Victoria
A1  - Diedrich, Ben
A1  - Garbe, Gregory
A1  - Görlich, Marianne
A1  - Leipold, Manfred
A1  - Lura, Franz
A1  - Macdonald, Malcolm
A1  - McInnes, Colin
A1  - Mengali, Giovanni
A1  - Quarta, Alessandro
A1  - Rios-Reyes, Leonel
A1  - Scheeres, Daniel J.
A1  - Seboldt, Wolfgang
A1  - Wie, Bong
T1  - Potential effects of optical solar sail degredation on trajectory design
T2  - AAS/AIAA Astrodynamics Specialist
N2  - The optical properties of the thin metalized polymer films that are projected for solar sails are assumed to be affected by the erosive effects of the space environment. Their degradation behavior in the real space environment, however, is to a considerable degree indefinite, because initial ground test results are controversial and relevant inspace tests have not been made so far. The standard optical solar sail models that are currently used for trajectory design do not take optical degradation into account, hence its potential effects on trajectory design have not been investigated so far. Nevertheless, optical degradation is important for high-fidelity solar sail mission design, because it decreases both the magnitude of the solar radiation pressure force acting on the sail and also the sail control authority. Therefore, we propose a simple parametric optical solar sail degradation model that describes the variation of the sail film’s optical coefficients with time, depending on the sail film’s environmental history, i.e., the radiation dose. The primary intention of our model is not to describe the exact behavior of specific film-coating combinations in the real space environment, but to provide a more general parametric framework for describing the general optical degradation behavior of solar sails. Using our model, the effects of different optical degradation behaviors on trajectory design are investigated for various exemplary missions.
Y1  - 2005
N1  - 2005 AAS/AIAA Astrodynamics Specialist Conference, 7-11.08.2005. Lake Tahoe, California
https://www.space-flight.org/AAS_meetings/2005_astro/2005_astro.html
SP  - 1
EP  - 23
ER  - 
TY  - JOUR
A1  - Grajewski, Matthias
A1  - Hron, Jaroslav
A1  - Turek, Stefan
T1  - Dual weighted a posteriori error estimation for a new nonconforming linear finite element on quadrilaterals
JF  - Applied Numerical Mathematics
N2  - After a short introduction of a new nonconforming linear finite element on quadrilaterals recently developed by Park, we derive a dual weighted residual-based a posteriori error estimator (in the sense of Becker and Rannacher) for this finite element. By computing a corresponding dual solution we estimate the error with respect to a given target error functional. The reliability and efficiency of this estimator is analyzed in several numerical experiments.
Y1  - 2005
U6  - http://dx.doi.org/10.1016/j.apnum.2004.09.016
SN  - 0168-9274
VL  - 54
IS  - 3-4
SP  - 504
EP  - 518
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Dachwald, Bernd
T1  - Optimization of very-low-thrust trajectories using evolutionary neurocontrol
JF  - Acta Astronautica
N2  - Searching optimal interplanetary trajectories for low-thrust spacecraft is usually a difficult and time-consuming task that involves much experience and expert knowledge in astrodynamics and optimal control theory. This is because the convergence behavior of traditional local optimizers, which are based on numerical optimal control methods, depends on an adequate initial guess, which is often hard to find, especially for very-low-thrust trajectories that necessitate many revolutions around the sun. The obtained solutions are typically close to the initial guess that is rarely close to the (unknown) global optimum. Within this paper, trajectory optimization problems are attacked from the perspective of artificial intelligence and machine learning. Inspired by natural archetypes, a smart global method for low-thrust trajectory optimization is proposed that fuses artificial neural networks and evolutionary algorithms into so-called evolutionary neurocontrollers. This novel method runs without an initial guess and does not require the attendance of an expert in astrodynamics and optimal control theory. This paper details how evolutionary neurocontrol works and how it could be implemented. The performance of the method is assessed for three different interplanetary missions with a thrust to mass ratio <0.15mN/kg (solar sail and nuclear electric).
Y1  - 2005
SN  - 1879-2030
VL  - 57
IS  - 2-8
SP  - 175
EP  - 185
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  -