Refine
Year of publication
- 2007 (312) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (57)
- Fachbereich Wirtschaftswissenschaften (48)
- Fachbereich Bauingenieurwesen (41)
- Fachbereich Elektrotechnik und Informationstechnik (39)
- IfB - Institut für Bioengineering (33)
- Fachbereich Luft- und Raumfahrttechnik (31)
- Fachbereich Energietechnik (24)
- Fachbereich Maschinenbau und Mechatronik (24)
- Fachbereich Chemie und Biotechnologie (20)
- INB - Institut für Nano- und Biotechnologien (19)
Document Type
- Article (176)
- Conference Proceeding (67)
- Book (28)
- Part of a Book (17)
- Patent (6)
- Diploma Thesis (4)
- Report (4)
- Part of a Periodical (3)
- Contribution to a Periodical (2)
- Doctoral Thesis (2)
Keywords
- Aachen / Fachhochschule Aachen (4)
- Aachen University of Applied Sciences (4)
- Kanalisation (4)
- Fachhochschule Aachen (3)
- Führung (3)
- Leadership (3)
- Corporate Design (2)
- Finite-Elemente-Methode (2)
- Kanalisierung (2)
- Kanalnetz (2)
By DLR-contact, sample return missions to the large main-belt asteroid “19, Fortuna” have been studied. The mission scenario has been based on three ion thrusters of the RIT-22 model, which is presently under space qualification, and on solar arrays equipped with triple-junction GaAs solar cells. After having designed the spacecraft, the orbit-to-orbit trajectories for both, a one-way SEP mission with a chemical sample return and an all-SEP return mission, have been optimized using a combination of artificial neural networks with evolutionary algorithms. Additionally, body-to-body trajectories have been
investigated within a launch period between 2012 and 2015. For orbit-to-orbit calculation, the launch masses of the hybrid mission and of the all-SEP mission resulted in 2.05 tons and 1.56 tons, respectively, including a scientific payload of 246 kg. For the related transfer
durations 4.14 yrs and 4.62 yrs were obtained. Finally, a comparison between the mission scenarios based on SEP and on NEP have been carried out favouring clearly SEP.
The most of conventional methods of air purification use the power of a fan to draw in air and pass it through a filter. The problem of bacterial contamination of inner parts of such a type of air conditioners in some cases draws attention towards alternative air-cleaning systems. Some manufacturers offer to use the ozone's bactericidal and deodorizing effects, but the wide spreading of such systems is restricted by the fact that toxic effects of ozone in respect of human beings are well known. In 2000 Sharp Inc. introduced "Plasma Cluster Ions (PCI)" air purification technology, which uses plasma discharge to generate cluster ions (I 0-14 ). This technology has been developed for those customers that are conscious about health and hygiene. In our experiments, we focused on some principal aspects of plasma-generated ions application - time-dependency and irreversibility of bactericidal action, spatial and kinetic characteristics of emitted cluster particles, their chemical targets in the microbial cells.
Computational aeroelastic analysis and design of the HIRENASD wind tunnel wing model and tests
(2007)
We propose a simple parametric OSSD 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.