نتایج جستجو برای: especially the scba
تعداد نتایج: 16055019 فیلتر نتایج به سال:
(1) Background: When a fire breaks out, combustibles are burned and toxic substances such as carbon monoxide (CO), polycyclic aromatic hydrocarbons (PAH), benzene, hydrogen cyanide produced. The purpose of this study is to evaluate the air quality inside self-contained breathing apparatus (SCBA) by comparing it that in environment where SCBA charger installed. (2) Methods: design was simulation...
Hybrid aluminum matrix composites (HAMCs) are a new class of advanced materials that can be customized and engineered to achieve specific properties for applications in environments. HAMCs find wide range popularity the transportation sector because lower noise fuel consumption over other materials. This research aims synthesize, characterize, test physicomechanical characteristics tetra hybrid...
this ethnographic case study research was carried out in a private school setting in the context of iran. the research tried to explore the analysis and identity construction of a group of learners and teachers along with the content analysis of books on the basis of four types of commodified, political, national and narrative identities. how english language learners and teachers in an informa...
the quest for power has formed much of the world history especially in 20th and 21st centuries. oil (energy) particularly after industrial revolution has been a tool for conquest and power and has been transformed to a geopolitical issue. from a geopolitical point of view this has been the case for the last two centuries in central asia and caucasus. central asia and caucasus has always been...
This work presents a technical and economic study using sugar cane bagasse ash (SCBA) to partially replace Portland cement clinker. To evaluate the viability, replacement rates of 10, 20, 30% were used in experiments. The ashes following conditions: (i) as collected (AC), (ii) ground (G), (iii) re-burnt (RG). Three composition parameters mortar mix procedures: with water factor/fixed binder vol...
Sustainable cements are an important alternative to reduce the environmental impact of cement industry by lowering clinker-to-cement ratio with supplementary cementitious materials. In this respect, present study aimed evaluate influence partial clinker replacement sugarcane bagasse ash (SCBA) and limestone filler (LF) on mechanical durability performance mortars. Four blended Portland were pro...
the present study aimed at exploring cognitions of iranian english teachers within the context of english for academic purposes (eap). to this end, the cognitions of two groups of eap teachers with respect to their pedagogical content knowledge (pck) and their sense of professional identity (pi) were probed. two language teachers and two content instructors who had at least five years of eap te...
in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...
abstract type-ii fuzzy logic has shown its superiority over traditional fuzzy logic when dealing with uncertainty. type-ii fuzzy logic controllers are however newer and more promising approaches that have been recently applied to various fields due to their significant contribution especially when the noise (as an important instance of uncertainty) emerges. during the design of type- i fuz...
abstract the variables affecting the nature of reading comprehension can be classified into two general categories: reader’s variables, and text variables (alderson, 2000). despite the wave of research on vocabulary knowledge as reader’s variable, the role of this knowledge in c-test as a text-dependent test and its interaction with lexical cohesion of the test as a text feature has remained a...
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