نتایج جستجو برای: فنل اوره فرمالدهید puf
تعداد نتایج: 8518 فیلتر نتایج به سال:
در این تحقیق، بهبود بعضی از خواص کاربردی تخته تراشه جهت دار ساخته شده از چوب با کاربرد محدود پالونیا با نانو ذرات (رس و سیلیکا) بررسی شد. نانو ذرات در 4 سطح (0و 1و 3و 5 درصد) به چسب اوره فرمالدهید اضافه شد. از آنجایی که نانو ذرات مورد استفاده روی گیرایی رزین اوره فرمالدهید تاثیر دارند، زمان پرس نیز به عنوان متغیر در دو زمان 7 و 10 دقیقه انتخاب شد. برخی ازمقاومت های مکانیکی از قبیل مدول گسیختگی،...
در این پژوهش ابتدا با استفاده از اسید فرمیک و آب اکسیژنه روغن سویای خام اپوکسی دار شد،سپس رزین سویا اپوکسی دار شده آکریلیکی تولید و خواص آن بررسی شد.با استفاده از رزین در دو سطح 8 و 13 درصد وزنی و در سه زمان پرس 8،10 و 12 دقیقه ،تخته خرده کاه ساخته شد.استحکام خمشی،مدول کشسانی خمشی،چسبندگی داخلی،واکشیدگی ضخامت و جذب آب تخته های حاصل بررسی شد.نتایج نشان می دهد،بیشترین مقدار استحکام خمشی،مدول کشسا...
Physical Unclonable Functions (PUFs) have emerged as a promising alternative to conventional mobile secure authentication devices. Instead of storing a cryptographic key in non-volatile memory, they provide a device specific challenge-response behavior uniquely determined by manufacturing variations. The Arbiter PUF has become a popular PUF representative due to its lightweight design and poten...
PUF family proteins are among the best-characterized regulatory RNA-binding proteins in nonmammalian species, but relatively little is known about mRNA targets or functions of mammalian PUF proteins. In this study, we used ribonomic analysis to identify and analyze mRNAs associated with ribonucleoproteins containing an endogenous human PUF protein, Pum1. Pum1-associated mRNAs were highly enrich...
The Physical Unclonable Function (PUF) is a promising hardware security primitive because of its inherent uniqueness and low cost. To extract the device-specific variation from delay-based strong PUFs, complex routing constraints are imposed to achieve symmetric path delays; and systematic variations can severely compromise the uniqueness of the PUF. In addition, the metastability of the arbite...
The first publication on the use of polyurethane foam (PUF) for sorption processes dates back to 1970, and soon after the material was applied for separation processes. The application of PUF as a sorbent for solid phase extraction of inorganic analytes for separation and pre-concentration purposes is reviewed. The physical and chemical characteristics of PUF (polyether and polyester type) are ...
A smart meter is resource-constrained device, therefore lightweight cryptographic methods are required. Physical unclonable function(PUF) is promising hardware based lightweight security solution, which makes use of the inherent process variation in semiconductor fabrication process to generate unique ID. This paper presents an PUF based smart meter security with frequency synthesizer(Sx) chain...
Physical Unclonable Functions (PUFs) have been introduced as a new cryptographic primitive, and whilst a large number of PUF designs and applications have been proposed, few studies has been undertaken on the theoretical foundation of PUFs. At the same time, many PUF designs have been found to be insecure, raising questions about their design methodology. Moreover, PUFs with efficient implement...
Puf proteins regulate mRNA degradation and translation through interactions with 3' untranslated regions (UTRs). Such regulation provides an efficient method to rapidly alter protein production during cellular stress. YHB1 encodes the only protein to detoxify nitric oxide in yeast. Here we show that YHB1 mRNA is destabilized by Puf1p, Puf4p, and Puf5p through two overlapping Puf recognition ele...
Pumilio/feminization of XX and XO animals (fem)-3 mRNA-binding factor (PUF) proteins bind sequence specifically to mRNA targets using a single-stranded RNA-binding domain comprising eight Pumilio (PUM) repeats. PUM repeats have now been identified in proteins that function in pre-rRNA processing, including human Puf-A and yeast Puf6. This is a role not previously ascribed to PUF proteins. Here ...
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