Conference Proceeding
Refine
Year of publication
- 2009 (85) (remove)
Document Type
- Conference Proceeding (85) (remove)
Keywords
- Blitzschutz (3)
- Fließgewässer (3)
- Geodatenbank (3)
- Geodatenhaltung (3)
- Geoinformationen (3)
- Geoinformationssystem (3)
- Renaturierung <Ökologie> (2)
- Spacecraft (2)
- Stickstoffmonoxid (2)
- Wasserwirtschaft (2)
- nitric oxide gas (2)
- Aachen / Fachhochschule Aachen ; Graduierter ; Promotionsstudium (1)
- Adsorption (1)
- Autofluoreszenzverfahren (1)
- Biophoton (1)
- Biosensor (1)
- Blitzeinschlag (1)
- Braunkohlenbergbau (1)
- Breitband Markt (1)
- Bundesnetzagentur (1)
Institute
- Fachbereich Bauingenieurwesen (18)
- Fachbereich Maschinenbau und Mechatronik (16)
- Solar-Institut Jülich (14)
- Fachbereich Luft- und Raumfahrttechnik (11)
- IfB - Institut für Bioengineering (10)
- Fachbereich Energietechnik (8)
- Fachbereich Elektrotechnik und Informationstechnik (7)
- Fachbereich Medizintechnik und Technomathematik (7)
- Fachbereich Architektur (3)
- Kommission für Forschung und Entwicklung (3)
- ECSM European Center for Sustainable Mobility (2)
- FH Aachen (1)
- Fachbereich Wirtschaftswissenschaften (1)
Optimierung des potentiellen Sauerstoffeintrags auf Treppenschussrinnen mit gemäßigter Neigung
(2009)
How does the implementation of a next generation network influence a telecommunication company?
(2009)
As the potential of a Next Generation Network (NGN) is recognized, telecommunication companies consider switching to it. Although the implementation of an NGN seems to be merely a modification of the network infrastructure, it may trigger or require changes in the whole company and even influence the company strategy. To capture the effects of NGN we propose a framework based on concepts of business engineering and technical recommendations for the introduction of NGN technology. The specific design of solutions for the layers "Strategy", "Processes" and "Information Systems" as well as their interdependencies are an essential characteristic of the developed framework. We have per-formed a case study on NGN implementation and observed that all layers captured by our framework are influenced by the introduction of an NGN.
The so-called "compound solar sail", also known as "Solar Photon Thruster" (SPT), holds the potential of providing significant performance advantages over the flat solar sail. Previous SPT design concepts, however, do not consider shadowing effects and multiple reflections of highly concentrated solar radiation that would inevitably destroy the gossamer sail film. In this paper, we propose a novel advanced SPT (ASPT) design concept that does not suffer from these oversimplifications. We present the equations that describe the thrust force acting on such a sail system and compare its performance with respect to the conventional flat solar sail.
The so-called "compound solar sail", also known as "Solar Photon Thruster" (SPT), is a solar sail design concept, for which the two basic functions of the solar sail, namely light collection and thrust direction, are uncoupled. In this paper, we introduce a novel SPT concept, termed the Advanced Solar Photon Thruster (ASPT). This model does not suffer from the simplified assumptions that have been made for the analysis of compound solar sails in previous studies. We present the equations that describe the force, which acts on the ASPT. After a detailed design analysis, the performance of the ASPT with respect to the conventional flat solar sail (FSS) is investigated for three interplanetary mission scenarios: An Earth-Venus rendezvous, where the solar sail has to spiral towards the Sun, an Earth-Mars rendezvous, where the solar sail has to spiral away from the Sun, and an Earth-NEA rendezvous (to near-Earth asteroid 1996FG3), where a large orbital eccentricity change is required. The investigated solar sails have realistic near-term characteristic accelerations between 0.1 and 0.2mm/s2. Our results show that a SPT is not superior to the flat solar sail unless very idealistic assumptions are made.
A melting probe equipped with autofluorescence-based detection system combined with a light scattering unit, and, optionally, with a microarray chip would be ideally suited to probe icy environments like Europa’s ice layer as well as the polar ice layers of Earth and Mars for recent and extinct live.