Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The Planeterrella, a pedagogic experiment in planetology and plasma physics

Lilensten J., Barthelemy M., Simon C., Jeanjacquot P., Gronoff G.

Acta Geophysica

2009

Vol. 57, no. 1

220-235

We present here a plasma physics experiment which makes it possible to simulate, in a naive yet useful way, the formation of polar lights. It involves shooting electrons at a magnetized sphere placed in a vacuum chamber. This experiment, inspired by K. Birkeland’s Terrella, built at the turn of 19th century, allows the visualization of very many geophysical and astrophysical situations. Although delicate, it is feasible at undergraduate level.

On the use of a new possibilist importance measure to reduce safety integrity level uncertainty

Sallak M., Simon C., Aubry J. F.

Journal of KONBiN

2006

No. 2

411--419

Safety Instrumented Systems (SIS) play a key role in process industry to achieve safety. One of the most important criteria for SIS design is the requirement that the user assigns and verify Safety Integrity Level (SIL) of SIS. This paper proposes a new possibilist importance measure to reduce the SIL uncertainty when the SIS components failure probabilities are uncertain.

Evaluating safety integrity level in presence of uncertainty

Sallak M., Aubry J. F., Simon C.

Journal of KONBiN

2006

No. 1

77--84

The safety standards ANSI/ISA S84.01-1996 and IEC 61508 address the application of Safety Instrumented Systems (SIS) to take a process to a safe state when predetermined conditions are violated. A critical aspect of conformance with the standards is the establishment of Safety Integrity Level (SIL) for SIS. This paper presents a fuzzy/possibilist approach for determining the SIL of the SIS in presence of uncertainty.