Untersuchungen über elektrische Gleitfunken

Zusammenfassung Die hier beschriebenen Gleitfunkenbilder kommen durch den im Funkenkanal auftretenden Gasdruck zustande. Die Breite der Störungszone nimmt bei konstanter Zündspannung mit zunehmender Gleitfunkenlänge ab, bei gleicher Bahnlänge mit zunehmender Zündspannung zu. Die Lage der-Zone fällt im allgemeinen mit der Winkelsymmetralen zusammen, jedoch zeigen sich bei den kleineren, hier untersuchten Zündspannungen Abweichungen von dieser Mittellage. Aus dieser Abweichung läßt sich der Wertc/v errechnen und auch die Richtung vonc, ob von der negativen zur positiven Elektrode oder umgekehrt, ermitteln. Der erstere Fall ist häufiger, jedoch tritt auch der zweite Fall auf. Es scheint, daß dabei Raumladungen eine ausschlaggebende Rolle spielen.     

A high-performance switch fabric for integrated circuit and packet switching

This paper describes an architecture for a high-performance switching fabric that can accommodate circuit-switched and packet-switched traffic in a unified manner. The switch fabric is self-routeing and uses fixed-length minipackets within the switching fabric for all types of connections. Its kernel architecture is based on a routeing topology with individual connection paths from all inputs to all outputs and with FIFO queuing at each output. Owing to the disjoint connection paths, there is no internal blocking, and because of output queueing, output port blocking is prevented to a great extent. The uniformity in architecture allows construction of any size fabric from a single basic module which could be realized on a single chip. Larger-size configurations can be realized either as single-stage or multistage configuration. The second part of this paper discusses performance aspects and gives results and dimensioning guidelines for both circuit-switched and packet-switched traffic.     

Metabolic discrimination between cholesterol and β-amyrin byPhytophthora cactorum

When cultures ofPhytophthora cactorum were incubated on solid medium for 3 weeks in the dark at 20 C with [¹⁴C] cholesterol or [¹⁴C]β-amyrin, the [¹⁴C] cholesterol was assimilated into the advancing mycelium to a greater extent than the [¹⁴C]β-amyrin. Examination of the mycelium and medium for radioactive metabolites showed significant differences in the metabolism of the 2 labeled compounds. Cholesterol was converted mainly to esters and to some extent to glycosides, whereas β-amyrin was only slightly converted to esters and not at all to glycosides. Presented at the International Symposium on “Phytophthora, Its Biology, Ecology, and Physiology,” at the University of California, Riverside, CA, April 1–4, 1981.     

Introduction to the Journal on Digital Libraries special issue on Asian digital libraries

International Journal on Digital Libraries -     

Projektmanagement im Anlagenbau

Project management in plant construction. Project management is a management concept increasingly employed in project execution both by industry and administration. There are variants to this management concept allowing it to be readily adapted to individual applications. Engineering companies are typically confronted with multi-project management tasks, i. e. they handle concurrently a great variety of projects differing in size, complexity, and duration. For each project, specialists from various disciplines of the company have to be coordinated across department lines and their performance channelled under project management leadership. Matrix project management lends itself particularly well to this task, the personality of the project manager playing a central role.