background: health-care-associated infections are a major threat to the safety of patient care. control of such problem is a major criterion for hospital accreditation. this study was aimed to determine the developing use of chemical (class 6 products) and biological indicators in tabriz district hospitals since 1997 to 2011. methods: we conducted this time-trend interventional study with all o...

This paper deals with the adaptive control of the nonlinear process represented by the continuous stirred tank reactor (CSTR). This chemical equipment is widely used in the chemical industry for production of various chemicals and drugs. Computer simulation which is used in this work has several advantages over the experint on the real model – it saves costs, reduces dangerousity and speed up e...

Then minimization may be performed on the interval [to, tl] only, where it is understood that x and u are periodically extended to [to, co). These periodic extensions satisfy the system equation (l.l), since x, is a complete state for this functional differential system. Hence it is sufficient to consider the optimal periodic control problem (l.l), (1.2) on [to, tI] with “mixed” boundary condit...

Four uniform fungicide trials were planted in Michigan during 3 – 8 Oct 2005. The sites were at the Plant Pathology Farm, East Lansing MI, (inoculated with Fusarium graminearum and mist-irrigated); Bean and Beet Farm, Saginaw, MI (inoculated/not-irrigated); Sanilac, Sanilac County, MI and at Williamston, Ingham County, MI (not-inoculated/not-irrigated). Caledonia wheat, treated with Thiram 42S ...

the aim of this study was to comparable application cultural, biological and chemical control methods of pests, diseases and weeds in rice among paddy farmers in sari county. a sample of 260 farmers was selected by using proportional random sampling method. data were collected by means of a questionnaire. validity of questionnaire was confirmed by agricultural jihad experts of sari county and s...