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Many-body effects in soft X-ray emission in metals

Soft X-ray emission in metals is treated, taking many-body effects and the electron-hole attraction into account. An appropriate connection with electron gas results is made. The structure in the low energy tail due to many-body effects are discussed, and the existence of a new critical point is suggested.

Aligning the Requirements Engineering Process with the Maturity of Markets and Products

This paper describes the product life cycle and its implications for the requirements engineering process, and proposes a research agenda for increasing the understanding of market and product maturity implications on requirements engineering. A product life cycle comprises four stages of maturity: Introduction, Growth, Maturity and Decline. All products go through these four stages of maturity du

Grafchart and its relations to Grafcet and Petri nets

The paper presents Grafchart, a graphical programming language for sequential control applications. Grafcahrt has been influenced by Grafcet/SFC and Petri nets. In the paper the relations between Grafchart and Grafcet/SFC and between Grafcahrt and Petri nets are presented and discussed.