نتایج جستجو برای: thermal sield

تعداد نتایج: 217266  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم پایه 1389

انتقال سریع و آسان گرما از مهمترین مسائل صنعت انتقال گرماست. نانوسیالات انواع جدیدی از سیالات هستند که از پراکنده سازی نانوذرات در سیالات پایه تهیه می شوند. تکنولوژی نانوسیال، چالش جدیدی برای هدایت گرمایی سیالات پایه است. دلیل این چالش، هدایت گرمایی نسبتا زیاد نانوسیالات نسبت به سیالات پایه است. در این تحقیق نانوسیال جدیدی که علاوه بر هدایت گرمایی زیاد، ویسکوزیته مناسبی نیز داشته باشد، مورد برر...

Journal: :iranian journal of public health 0
f. goebabai ; k. parwizpoor m. mahmoudi

the purpose of this study was to determine the seasonal changes of vital signs (body temperature, pulse rate and blood pressure) in relation to the working thermal conditions. in this study a total number of 202 permanent workers of bakeries were studied during summer and winter. the results showed the body temperature and pulse rate raised more in summer than in winter in all workers except wh...

Journal: :journal of paramedical sciences 0
bi bi fatemeh nobakht motlagh ghochani proteomics research center, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran seyedeh zahra moosavi-nejad department of biology, faculty of basic sciences, alzahra university, tehran seyed ashkan ordibehesht tehran sport medicine board, tehran

lysozyme is considered as part of the innate immune system. it has stimulated considerable interest as a natural food preservative. lysozyme has been shown to be effective in preserving a variety of foods such as fresh fruits and vegetables, meats, seafood and wine, for which many japanese patents have been granted. the relatively high thermal stability of lysozyme also makes it attractive for ...

2013
Huaizhou Zhao Mani Pokharel Gaohua Zhu Shuo Chen Kevin Lukas Qing Jie Cyril Opeil Gang Chen Zhifeng Ren

2015
Ashutosh Giri Patrick E. Hopkins James G. Wessel John C. Duda

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2006
Luca Delfini Stefano Lepri Roberto Livi Antonio Politi

In the present Rapid Communication we present an analytical and numerical solution of the self-consistent mode-coupling equations for the problem of heat conductivity in one-dimensional systems. Such a solution leads us to propose a different scenario to accommodate the known results obtained so far for this problem. More precisely, we conjecture that the universality class is determined by the...

Journal: :iranian chemical communication 0
soleyman hosseinzadeh department of chemical engineering, payame noor university, tehran, iran shahryar pashaei department of chemistry, payame noor university, tehran, i.r of iran. nazanin moludpoor department of chemical enginering, payame noor university, tehran, i.r of iran

a series of polystyrene hybrid nanocomposites have been fabricated with varying amounts of tio2 viz., 0, 0.5 and 1 % w/w along with 3% ts by in-situ polymerization method. the influence of surface modified tio2 nanoparticles on the thermal properties of ps matrix was examined using thermogravimetry and differential scanning calorimetry. thermal characteristics of the polystyrene/ts/tio2 hybrid ...

Journal: :international journal of nonlinear analysis and applications 2015
surjan singh dinesh kumar k. n rai

in this paper, wavelet collocation method has been used to solve nonlinear fin problem with temperature dependent thermal conductivity and heat transfer coefficient. thermal conductivity of fin materials varies any type so that we consider thermal conductivity as the general function of temperature.  here we consider three particular cases, where we assume that thermal conductivity is constant,...

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