نتایج جستجو برای: passive sampling
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résumé: l’étude contrastive, sur laquelle ce travail de recherche a été basé, balise le terrain pour une étude méthodologique des langues et elle offre également de nouvel horizon pour l’apprentissage d’une langue seconde. dans ce travail de recherche, une comparaison méthodique entre les notions et les emplois du passif en persan et en français a été faite. cette recherche a pour objectif ...
In this paper, we propose a robust self-triggered real-time scheduling strategy for stabilization of passive or output feedback passive systems under unstructured uncertainties and in the presence of non-trivial actuation update delays. We assume that the unstructured uncertainty is a L2 stable dynamic system in a feedback or feedforward interconnection with the model of the plant, we took the ...
پسماند چوبی درشت ) coarse woody debris ( یکی از اجزای مهم اکوسیستم جنگل است که نقش مهمی در فرآیندهای این اکوسیستم ایفا میکند. طی دهه اخیر توجه فراوانی به این جزء مهم بومسازگان توسط بوم- شناسان و جنگلشناسان شده است و روشهایی برای نمونهبرداری این جزء مهم اکوسیستم معرفی شده که همگی قطعات cwd را با احتمال نابرابر به عنوان نمونه انتخاب می نمایند. pds ( perpendicular distance sampling ،) dls ( dis...
The monitoring of control loop performance in building automation is important for decreasing the maintenance costs. Passive monitoring with network analyzers is inexpensive and does not influence the network load. However, control signals that are not transmitted over the network are unobservable. This paper purposes an approach to the reconstruction of missing control signals and the computat...
the purpose of this study was the relationship between problem – solvi ability with fdi cognitive style of students.the research method was correlation method. for data analysis pearson test was used. statistical society in this research was all the students of alligoodarz city in 1391-92 year.to sampling of statiscal population was used sampling multi-stage random the size of sample selected 2...
The objective of this work was to investigate the ability of the Wagner-Leith passive aerosol sampler to measure indoor exposures over periods of 24 hours to 2 weeks. An automated analysis technique was developed so that lower aerosol concentrations could be sampled over shorter time periods. A test of the new analytical method against a manual method showed good agreement. The passive sampler ...
CONTEXT Health care professionals, educators, and others are increasingly called upon to advise parents and policymakers about risks posed to children by Internet use. However, little scientific information exists on the experiences of children online. OBJECTIVE To assess the risk factors surrounding online sexual solicitations of youth and distress due to solicitation. DESIGN, SETTING, AND...
During the 1990s, several large-scale studies of benzene concentrations in air, food, and blood have added to our knowledge of its environmental occurrence. In general, the new studies have confirmed the earlier findings of the U.S. Environmental Protection Agency Total Exposure Assessment Methodology (TEAM) studies and other large-scale studies in Germany and the Netherlands concerning the lev...
Materials and nzethods The Hooded Lister inbred rats used have been described as good responders (Jarrett & Steward, 1974; Bazin, 1977) for reaginic antibodies to dinitrophenylated ovalbumin. The animals were bred in this laboratory and were reared in Makrolon cages. They were fed with water and commercial food (UAR, Villemoisson-sur-Orge, France) shown by testing to contain no ovalbumin. Detai...
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