The state of the basic technology for high speed networks and multimedia applications has already stabilised (incl. transport protocols, compression standards, telecooperation tools). The next challenge is the integra...
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The state of the basic technology for high speed networks and multimedia applications has already stabilised (incl. transport protocols, compression standards, telecooperation tools). The next challenge is the integration of existing basic technologies into new application environments adapted to organisational structures. The HotCon project has thus adopted an approach whereby existing communication and cooperation support services and newly developed coordination tools are integrated to form an overall system. The resulting multimedia hotline and consulting system will be used by the Berlin Administration to support network and system management. HotCon is based on the Berlin Metropolitan Area Network, an ATM network with a transmission rate of 155 Mbit/s. The HotCon System supports a synchronous or asynchronous dialog between a user and a specialist in problem situations. Asynchronous transmission of information is achieved by means of an extended X.400 service which permits the sending of multimedia messages (incl. graphics and video). Synchronous communication is supported by a telecooperation platform. Solutions to problems and further courseware are stored in a HotCon Database, into which the multimedia information service WWW is integrated. These services and other application-specific tools are brought together under a uniform user interface. The HotCon project is being carried out as part of one of the DFN association's Regional Testbed Projects which are aimed at combining broadband network structures with the development and use of new applications in various parts of Germany.
作者：
Wu, XQISST
Fraunhofer Institute for Software Engineering and Systems Engineering Postfach 520130 44207 Dortmund Germany
As database technology advances rapidly, there are usually heterogeneous databases (hierarchical, relational or object-oriented databases) used by different departments in an enterprise. On the other hand, the object-...
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ISBN:
(纸本)354061656X
As database technology advances rapidly, there are usually heterogeneous databases (hierarchical, relational or object-oriented databases) used by different departments in an enterprise. On the other hand, the object-oriented technology is becoming the dominant application development paradigm. Thus, there is a data modeling gap between applications and heterogeneous databases. In this paper we present different architecture aspects of the system VHDBS1, which has been developed by an ongoing research project. This architecture provides a way to support cooperative access to distributed heterogeneous databases and to fill the data modeling gap in a distributed heterogeneous environment.
As database technology advances rapidly, there are usually heterogeneous databases used by different departments in an enterprise. On the other hand, the object oriented technology is becoming the dominant application...
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ISBN:
(纸本)0818676140
As database technology advances rapidly, there are usually heterogeneous databases used by different departments in an enterprise. On the other hand, the object oriented technology is becoming the dominant application development paradigm. Thus, there is a data modeling gap between applications and heterogeneous databases. We present some main architecture aspects of the system VHDBS which has been developed by an ongoing research project. This architecture provides a way to support cooperative access to distributed heterogeneous databases and to fill the data modeling gap in a distributed heterogeneous environment. Our work contributes not only to an implementation solution but also to an architecture framework and paradigmatic solution.
A new approach of flexible and light-weighted multichannel electrodes with integrated cables has been developed for interfacing peripheral nerves using micromachining technologies. The process technology is described ...
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A new approach of flexible and light-weighted multichannel electrodes with integrated cables has been developed for interfacing peripheral nerves using micromachining technologies. The process technology is described and planar and three dimensional electrode designs are presented. The electrodes exhibit promising mechanical stability and high insulation resistance. In first acute in vivo experiments, the authors have recorded electroneurograms (ENG) with a good signal to noise ratio from the stomatogasstric nervous system of the crab.
We present a new type of Petri net called "control and integration net" (CIN) utilized for simulation and evaluation of CIMOSA (computer integrated manufacturing open system architecture) models. We discuss ...
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We present a new type of Petri net called "control and integration net" (CIN) utilized for simulation and evaluation of CIMOSA (computer integrated manufacturing open system architecture) models. We discuss the definition of a set of rules for mapping CIMOSA models to CIN structure, a formal language to describe the CIN structures, and the graphical representation extended from the conventional Petri nets. We also present an engineering environment for cellular manufacturing, in which simulation results will guide the modeller to optimize CIMOSA models with help of the CIN interpreter and simulator according to user requirements.
A design of a flexible, light-weighted sieve electrode with integrated cables for interfacing regenerating nerves has been developed using micromachining technologies. The authors used polyimide as substrate and insul...
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A design of a flexible, light-weighted sieve electrode with integrated cables for interfacing regenerating nerves has been developed using micromachining technologies. The authors used polyimide as substrate and insulation layers and platinum as electrode metallization. The materials showed no cytotoxic effects in biocompatibility testing. In first chronic experiments on the sciatic nerve of rats, the authors received good regeneration, a functional reinervation, and no mechanical traumatization of the nerve caused by the microsystem due to the flexible materials.
The effects of highly dispersed (≤ 0.1mg/cm2) noble metal catalysts (e.g. Pd, Pt, Ir and Ru) on the electrochemical performance of screen printed La0.84Sr0.16MnO3 cathodes was investigated. At typical operating condi...
The effects of highly dispersed (≤ 0.1mg/cm2) noble metal catalysts (e.g. Pd, Pt, Ir and Ru) on the electrochemical performance of screen printed La0.84Sr0.16MnO3 cathodes was investigated. At typical operating conditions (e.g. T=1273K, η= −0.1V), the current density in presence of palladium is increased by about one order of magnitude as compared to the current density obtained with pure La0.84Sr0.16MnO3 cathodes. At the same time, the apparent activation energy of the oxygen reduction reaction is decreased from ≈ 2eV (without catalyst) to ≈ 1eV (with Pd).
What is the relation between the average level of complexity that characterizes a product's technology, and the degree of diversity of that technology across rival firms? Evolutionary theories of innovation and te...
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Software Re-use depends on the availability of engineering concepts for its support. The article introduces some of those engineering concepts and two derived notions: uniformity and invariance. It is argued that both...
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