Refine
Year of publication
- 2021 (18)
- 2020 (129)
- 2019 (169)
- 2018 (141)
- 2017 (132)
- 2016 (143)
- 2015 (163)
- 2014 (157)
- 2013 (164)
- 2012 (150)
- 2011 (180)
- 2010 (173)
- 2009 (175)
- 2008 (153)
- 2007 (143)
- 2006 (157)
- 2005 (126)
- 2004 (159)
- 2003 (105)
- 2002 (129)
- 2001 (105)
- 2000 (107)
- 1999 (105)
- 1998 (98)
- 1997 (98)
- 1996 (81)
- 1995 (78)
- 1994 (86)
- 1993 (59)
- 1992 (54)
- 1991 (29)
- 1990 (39)
- 1989 (45)
- 1988 (57)
- 1987 (32)
- 1986 (19)
- 1985 (34)
- 1984 (21)
- 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)
- (11)
Document Type
- Article (2989)
- Conference Proceeding (897)
- Part of a Book (136)
- Book (134)
- Doctoral Thesis (28)
- Patent (25)
- Report (8)
- Other (6)
- Lecture (5)
- Working Paper (3)
- Master's Thesis (2)
- Bachelor Thesis (1)
- Video (1)
Language
- English (4235) (remove)
Keywords
- Biosensor (25)
- Finite-Elemente-Methode (12)
- Einspielen <Werkstoff> (10)
- CAD (8)
- civil engineering (8)
- Bauingenieurwesen (7)
- Blitzschutz (6)
- FEM (6)
- avalanche (6)
- Clusterion (5)
- shakedown analysis (5)
- Air purification (4)
- Hämoglobin (4)
- Limit analysis (4)
- Luftreiniger (4)
- Papierkunst (4)
- Plasmacluster ion technology (4)
- Raumluft (4)
- Shakedown analysis (4)
- Sonde (4)
Institute
- Fachbereich Medizintechnik und Technomathematik (1517)
- Fachbereich Elektrotechnik und Informationstechnik (579)
- INB - Institut für Nano- und Biotechnologien (509)
- Fachbereich Chemie und Biotechnologie (496)
- IfB - Institut für Bioengineering (486)
- Fachbereich Energietechnik (480)
- Fachbereich Luft- und Raumfahrttechnik (381)
- Fachbereich Maschinenbau und Mechatronik (257)
- Fachbereich Wirtschaftswissenschaften (186)
- Solar-Institut Jülich (136)
- Fachbereich Bauingenieurwesen (135)
- MASKOR Institut für Mobile Autonome Systeme und Kognitive Robotik (47)
- Fachbereich Gestaltung (23)
- Sonstiges (21)
- Fachbereich Architektur (20)
- Institut fuer Angewandte Polymerchemie (20)
- ECSM European Center for Sustainable Mobility (19)
- Nowum-Energy (18)
- Freshman Institute (17)
- ZHQ - Bereich Hochschuldidaktik und Evaluation (7)
The utilization of phase change material (PCM) for latent heat storage and thermal control of spacecraft has been demonstrated in the past in few missions only. One limiting factor was the fact that all concepts developed so far envisioned the PCM to be applied as an additional capacitor, encapsulated in its own housing, leading to mass, efficiency and accommodation challenges. Recently, the application of PCM within the scan cavity of a GEOS type satellite has been suggested, in order to tackle thermal issues due to direct sun intrusion (Choi, M., 2014). However, the application of PCM in such complex mechanical structures is extremely challenging. A new concept to tackle this issue is currently under development at the FH Aachen University of Applied Sciences. The concept "Infused Thermal Solutions (ITS)" is based on the idea to 3D print metallic structures in their regular functional shape, but double walled with internal lattice support structures, allowing the infusion of a PCM layer directly into the voids and eliminating the need for additional parts and interfaces. Together with OHB System, FH Aachen theoretically studied the application of this technology to the Meteosat Third Generation (MTG) Infra-Red Sounder (IRS) instrument. The study focuses on the scan cavity and entrance baffling assembly (EBA) of the IRS. It consists of thermal analyses, 3D-redesign and bread boarding of a scaled and PCM infused EBA version. In the thermal design of the alternative EBA, PCM was applied directly into the EBA, simulating the worst hot case sun intrusion of the mission. By applying 4kg of PCM (to a 60kg baffle) the EBA temperature excursions during sun intrusion were limited from 140K to 30K, leading to a significant thermo-opto-elastic performance gain. This paper introduces the ITS concept development status.
Bitcoin is a cryptocurrency and is considered a high-risk asset
class whose price changes are difficult to predict. Current research focusses
on daily price movements with a limited number of predictors. The paper at
hand aims at identifying measurable indicators for Bitcoin price movement s
and the development of a suitable forecasting model for hourly changes. The
paper provides three research contributions. First, a set of significant
indicators for predicting the Bitcoin price is identified. Second, the results of
a trained Long Short-term Memory (LSTM) neural network that predicts
price changes on an hourly basis is presented and compared with other
algorithms. Third, the results foster discussions of the applicability of neural
nets for stock price predictions. In total, 47 input features for a period of
over 10 months could be retrieved to train a neural net that predicts the
Bitcoin price movements with an error rate of 3.52 %.
Combined with the use of renewable energy sources for
its production, Hydrogen represents a possible alternative gas
turbine fuel for future low emission power generation. Due to
its different physical properties compared to other fuels such
as natural gas, well established gas turbine combustion
systems cannot be directly applied for Dry Low NOx (DLN)
Hydrogen combustion. This makes the development of new
combustion technologies an essential and challenging task
for the future of hydrogen fueled gas turbines.
The newly developed and successfully tested “DLN
Micromix” combustion technology offers a great potential to
burn hydrogen in gas turbines at very low NOx emissions.
Aiming to further develop an existing burner design in terms
of increased energy density, a redesign is required in order to
stabilise the flames at higher mass flows and to maintain low
emission levels.
For this purpose, a systematic design exploration has
been carried out with the support of CFD and optimisation
tools to identify the interactions of geometrical and design
parameters on the combustor performance. Aerodynamic
effects as well as flame and emission formation are observed
and understood time- and cost-efficiently. Correlations
between single geometric values, the pressure drop of the
burner and NOx production have been identified as a result.
This numeric methodology helps to reduce the effort of
manufacturing and testing to few designs for single
validation campaigns, in order to confirm the flame stability
and NOx emissions in a wider operating condition field.
Biocomposite Materials Based on Carbonized Rice Husk in Biomedicine and Environmental Applications
(2020)
Modeling and upscaling of a pilot bayonettube reactor for indirect solar mixed methane reforming
(2020)
Frequency Dependent Impedance Analysis of the Foundation-Soil-Systems of Onshore Wind Turbines
(2018)
The Effect of Openings on Out-of-Plane Capacity of Masonry Infilled Reinforced Concrete Frames
(2018)
Investigation Of The Seismic Behaviour Of Infill Masonry Using Numerical Modelling Approaches
(2017)
Analysis Of Base Isolated Liquid Storage Tanks With 3D Fsi-Analysis As Well As Simplified Approaches
(2017)
Rapid Tooling
(2019)
7T MR Safety
(2021)
