Refine
Year of publication
- 2024 (22)
- 2023 (77)
- 2022 (122)
- 2021 (127)
- 2020 (154)
- 2019 (191)
- 2018 (165)
- 2017 (153)
- 2016 (150)
- 2015 (162)
- 2014 (159)
- 2013 (168)
- 2012 (152)
- 2011 (178)
- 2010 (173)
- 2009 (175)
- 2008 (148)
- 2007 (137)
- 2006 (129)
- 2005 (122)
- 2004 (150)
- 2003 (95)
- 2002 (123)
- 2001 (103)
- 2000 (102)
- 1999 (109)
- 1998 (98)
- 1997 (96)
- 1996 (81)
- 1995 (78)
- 1994 (86)
- 1993 (59)
- 1992 (54)
- 1991 (29)
- 1990 (39)
- 1989 (44)
- 1988 (56)
- 1987 (32)
- 1986 (19)
- 1985 (33)
- 1984 (22)
- 1983 (20)
- 1982 (29)
- 1981 (20)
- 1980 (36)
- 1979 (24)
- 1978 (34)
- 1977 (14)
- 1976 (13)
- 1975 (12)
- 1974 (3)
- 1973 (2)
- 1972 (2)
- 1971 (1)
- 1968 (1)
Document Type
- Article (3149)
- Conference Proceeding (1016)
- Part of a Book (184)
- Book (144)
- Doctoral Thesis (30)
- Patent (25)
- Other (9)
- Report (9)
- Preprint (4)
- Poster (3)
- Talk (3)
- Master's Thesis (2)
- Working Paper (2)
- Bachelor Thesis (1)
- Contribution to a Periodical (1)
- Habilitation (1)
Language
- English (4583) (remove)
Has Fulltext
- no (4583) (remove)
Keywords
- Gamification (6)
- avalanche (6)
- Earthquake (5)
- Enterprise Architecture (5)
- MINLP (5)
- solar sail (5)
- Diversity Management (4)
- Energy storage (4)
- Engineering optimization (4)
- LAPS (4)
- Natural language processing (4)
- Papierkunst (4)
- Power plants (4)
- Seismic design (4)
- field-effect sensor (4)
- frequency mixing magnetic detection (4)
- hydrogen (4)
- metal structure (4)
- snow (4)
- steel (4)
Institute
- Fachbereich Medizintechnik und Technomathematik (1545)
- Fachbereich Elektrotechnik und Informationstechnik (686)
- IfB - Institut für Bioengineering (560)
- Fachbereich Energietechnik (552)
- INB - Institut für Nano- und Biotechnologien (532)
- Fachbereich Chemie und Biotechnologie (522)
- Fachbereich Luft- und Raumfahrttechnik (463)
- Fachbereich Maschinenbau und Mechatronik (261)
- Fachbereich Wirtschaftswissenschaften (196)
- Solar-Institut Jülich (160)
- Fachbereich Bauingenieurwesen (146)
- ECSM European Center for Sustainable Mobility (75)
- MASKOR Institut für Mobile Autonome Systeme und Kognitive Robotik (62)
- Fachbereich Gestaltung (24)
- Nowum-Energy (24)
- Institut fuer Angewandte Polymerchemie (23)
- Sonstiges (21)
- Fachbereich Architektur (20)
- Freshman Institute (18)
- Kommission für Forschung und Entwicklung (18)
Air- and water-stable phenyl complexes with nitridotechnetium(V) cores can be prepared by straightforward procedures. [TcNPh2(PPh3)2] is formed by the reaction of [TcNCl2(PPh3)2] with PhLi. The analogous N-heterocyclic carbene (NHC) compound [TcNPh2(HLPh)2], where HLPh is 1,3,4-triphenyl-1,2,4-triazol-5-ylidene, is available from (NBu4)[TcNCl4] and HLPh or its methoxo-protected form. The latter compound allows the comparison of different Tc–C bonds within one compound. Surprisingly, the Tc chemistry with such NHCs does not resemble that of corresponding Re complexes, where CH activation and orthometalation dominate.
Production of Y-86 and other radiometals for research purposes using a solution target system
(2015)
AgTcO4 reacts with R3ECl compounds (E = C, Si, Ge, Sn, Pb; R = Me, iPr, tBu, Ph), tBu2SnCl2, or PhMgCl under formation of novel trioxotechnetium(VII) derivatives. The carbon and silicon derivatives readily undergo decomposition, which was proven by 99Tc NMR spectroscopy and the isolation of decomposition products such as [TcOCl3(THF)(OH2)]. Compounds [Ph3GeOTcO3], [(THF)Ph3SnOTcO3], [(O3TcO)SntBu2(OH)]2, and [(THF)4Mg(OTcO3)2] are more stable and were isolated in crystalline form and characterized by X-ray diffraction.
High gradient magnetic separation (HGMS) has been established since the early 1970s. A more recent application of these systems is the use in bioprocesses. To integrate the HGMS in a fermentation process, it is necessary to optimize the separation matrix with regard to the magnetic separation characteristics and permeability of the non-magnetizable components of the fermentation broth. As part of the work presented here, a combined fluidic and magnetic force finite element model simulation was created using the software COMSOL Multiphysics and compared with separation experiments. Finally, as optimal lattice orientation of the separation matrix, a transversal rhombohedral arrangement was defined. The high suitability of the new filter matrix has been verified by separation experiments.
In our case the double-side-method is used to minimize the complexity of a matrix-readout. Here the number of channels is reduced to 2√N̅. It is also possible to benefit from the method in a single pixel readout system. One signal can be used to measure position and energy of the event, the other one can be applied to a fast trigger-circuit at the same time. In a next step we will investigate timing behavior and electrical crosstalk of the circuit.
Manufacturing process simulation (MPS) has become more and more important for aviation and the automobile industry. A highly competitive market requires the use of high performance metals and composite materials in combination with reduced manufacturing cost and time as well as a minimization of the time to market for a new product. However, the use of such materials is expensive and requires sophisticated manufacturing processes. An experience based process and tooling design followed by a lengthy trial-and-error optimization is just not contemporary anymore. Instead, a tooling design process aided by simulation is used more often. This paper provides an overview of the capabilities of MPS in the fields of sheet metal forming and prepreg autoclave manufacturing of composite parts summarizing the resulting benefits for tooling design and manufacturing engineering. The simulation technology is explained briefly in order to show several simplification and optimization techniques for developing industrialized simulation approaches. Small case studies provide examples of an efficient application on an industrial scale.
This paper covers the use of the magnetic Wiegand effect to design an innovative incremental encoder. First, a theoretical design is given, followed by an estimation of the achievable accuracy and an optimization in open-loop operation.
Finally, a successful experimental verification is presented. For this purpose, a permanent magnet synchronous machine is controlled in a field-oriented manner, using the angle information of the prototype.