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Mobilität und Bindungsformen von Cd, Cr, As und V in urbanen Böden unterschiedlicher Belastung
(1995)
Die Erfindung betrifft eine Spritzeinheit (1) für eine durch eine elektronische Steuerung gesteuerte Spritzgießmaschine, bestehend aus einer eine Schnecke (2) aufweisende Plastifiziereinheit (3), einem Antriebsmotor (4) und einem Getriebe (5) für den rotatorischen Antrieb der Schnecke (2). Das Getriebe (5) besteht aus einem Gehäuse, in dem eine mit dem Antriebsmotor (4) verbundene hydraulische Pumpe (7) angeordnet ist, die mit einem hydraulischen Motor (8) gekoppelt ist, der hydraulische Motor (8) treibt vorzugsweise über ein mechanisches Getriebe (9) die Schnecke (2) der Plastifiziereinheit (3) an. Erfindungsgemäß wird es damit möglich, mit geringem Aufwand die Rotationsdrehzahl der Schnecke (2) stufenlos zu regeln und so die gesamte Drehmomentenkennlinie des Antriebsmotors (4) zu nutzen. Das Getriebe wird vorzugsweise in kompakter Form ausgeführt, wobei die hydraulische Pumpe (7), der hydraulische Motor (8) und das mechanische Getriebe (9), das vorzugsweise als Planetengetriebe ausgeführt ist, koaxial angeordnet sind.
Reduktion der Verlustleistung integrierter CMOS-Schaltungen durch Anpassung an Signaleigenschaften
(1995)
The Information Footprint
(1995)
Three emerging technologies are combined in a setup that has been installed and tested at GMD - the German National Research Center for Information Technology: 1. Multimedia Telecooperation Applications; 2. ATM-based high-speed networks; 3. Satellite links. The results are promising: After some initial problems, the complete scenario is up and running, allowing the interconnection of local high-speed infrastructures in rural areas to a core network via satellite. This paper describes the R&D background and state- of-the-art that led us to this approach. It then describes the communication infrastructure and the application infra- structure of the setup, the problems we had and the solu- tions we found. Finally, our experiences are summarized, and an outlook is made for future implementations.
Filling the Pipe
(1995)
An Information on Demand teleservice that was developed at the German National Research Center for Information Technology (GMD) provides remote access to multimedia information consisting of audio, video, and text [jonas et al. 94]. It uses a bidirectional narrowband message link between the end user and the service provider, and a unidirectional broadband data link from the service provider to the end user. Since the IoD teleservice is used across a satellite connection (among others), it turned out to be necessary to implement an access protocol that is optimized for the access of real-time multimedia data across a long-delay high-bandwidth link, a long fat pipe [jacobsen et al. 92]. This paper introduces the MediaService Protocol (MSP) and describes a prototype implementation (version 0.6).
System R/3: Die führende Standard-Software für betriebswirtschaftliche Client/Server-Anwendungen
(1995)
We propose a new alignment procedure that is capable of aligning protein sequences and structures in a unified manner. Recursive dynamic programming (RDP) is a hierarchical method which, on each level of the hierarchy, identifies locally optimal solutions and assembles them into partial alignments of sequences and/or structures. In contrast to classical dynamic programming, RDP can also handle alignment problems that use objective functions not obeying the principle of prefix optimality, e.g.\ scoring schemes derived from energy potentials of mean force. For such alignment problems, RDP aims at computing solutions that are near-optimal with respect to the involved cost function and biologically meaningful at the same time. Towards this goal, RDP maintains a dynamic balance between different factors governing alignment fitness such as evolutionary relationships and structural preferences. As in the RDP method gaps are not scored explicitly, the problematic assignment of gap cost parameters is circumvented. In order to evaluate the RDP approach we analyse whether known and accepted multiple alignments based on structural information can be reproduced with the RDP method. For this purpose, we consider the family of ferredoxins as our prime example. Our experiments show that, if properly tuned, the RDP method can outperform methods based on classical sequence alignment algorithms as well as methods that take purely structural information into account.
信息时代的制造业及信息的价值 任守
(1995)