abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...

تغییر در ساختار پروتئین های بدن منجر به تولید آنتی بادی علیه آنها می شود. احتمالا ایجاد پلی مرفیسم در ژن پراکسیداز تیروئیدی (tpo) و تغییر ساختار آن باعث تولید آنتی بادی ضد پراکسیداز تیروئیدی می شود. اختلال درآنزیمtpo می تواند یکی از دلایل اصلی بروز بیماری کم کاری تیروئید باشد که شیوع و گسترش این بیماری، ما را بر آن داشت که در این مطالعه به بررسی ارتباط پلی مرفیسم a1936/g اگزون11و t2229/c اگزون1...

learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...

in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...

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abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...