نتایج جستجو برای: mechanical wood modification on properties of compressed wood to be used practically

تعداد نتایج: 22906156  

Journal: :هنرهای نمایش و موسیقی 0
سیده زهرا شریفی سوسری 1کارشناسی ارشد مهندسی علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، تهران کامبیز پورطهماسی دانشیارگروه مهندسی علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، تهران آیدا س¬گلپایگانی دکتری مکانیک درخت و چوب، دانشگاه مونپلیه 2، مونپلیه، فرانسه ایریس برمود محقق و عضو گروه مکانیک درخت و چوب، در دانشگاه مونپلیه 2، مونپلیه، فرانسه

abstract: for many years, the wood of walnut tree (juglans regia) has been used for making santur. even though artisans have their own divers’ ideas about this species’ features; until now there has been no scientific data to support them. in santur’s case specially, differently cut surface plates can be formed into final instrument. besides, some steam treatments, which supposedly improve the ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز 1390

abstract:assume that y is a banach space such that r(y ) ? 2, where r(.) is garc?a-falset’s coefficient. and x is a banach space which can be continuously embedded in y . we prove that x can be renormed to satisfy the weak fixed point property (w-fpp). on the other hand, assume that k is a scattered compact topological space such that k(!) = ? ; and c(k) is the space of all real continuous ...

Journal: :علوم و تکنولوژی پلیمر 0
منا فیروزه سعید کاظمی نجفی اسماعیل قاسمی

mechanical properties of wood/plastic composites manufactured by polyethylene and polypropylene blends (pp/hdpe) were studied. the sebs (styrene-ethylene butylene-styrene) and epdm (ethylene-propylene diene monomer) were used as compatibilizers to improve the compatibility and miscibility of the interface between hdpe and pp phases. the sawdust and polymers were compounded using an internal mix...

2016
Te-Hsin Yang Feng-Rong Chang Cheng-Jung Lin Feng-Cheng Chang

This study investigated the application of heat to wood samples from Japanese cedar trees (Cryptomeria japonica) of small and medium diameters to evaluate the effects of both the temperature and duration of treatment on its surface, physical, and mechanical properties. The results indicate that the density, moisture content, and hygroscopicity of the wood samples decreased as the treatment temp...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1389

the current study examined iranian undergraduate efl students’ willingness to communicate with regard to their vocabulary knowledge. in general, participants were somewhat willing to communicate in english. the total mean score of 730 university students’ perception of willing to communicate was 83.53 out of 135. results, regarding four parts of willingness to communicate, revealed that part...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده برق و کامپیوتر 1391

in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند 1390

abstract this study attempted to investigate the strategies used to translate clichés of emotions in dubbed movies in iranian dubbing context for home video companies. the corpus of the current study was parallel and comparable in nature, consisting of five original american movies and their dubbed versions in persian, and five original persian movies which served as a touchstone for judging n...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1393

the purpose of this study was to examine the comparative effect of story retelling and role playing on efl learners’ vocabulary learning and reading comprehension. to carry out the purpose of the study 90 female learners of tabarestan language school located in noshahr were non-randomly selected. they took pet test and among these 90 participants 62 students were selected as homogenous learners...

2010
Guo-feng Wu Qian Lang Ping Qu Yi-fei Jiang Junwen Pu

Urea-formaldehyde prepolymer and hot-press drying were used to improve the properties of poplar wood. The wood was impregnated with the prepolymer using a pulse-dipping machine. The impregnated timbers were compressed and dried by a multilayer hot-press drying kiln. The drying rate was more rapid during the chemical modification and hotpress drying than conventional kiln-drying. In addition, th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد 1388

there is less published research about how teachers in efl contexts respond to students who are relatively less mature and less competent l2 writers. while writing researchers have examined various issues concerning peer and teacher response in writing-oriented classes, little research has centered on the effect of collaborative tasks particularly dictogloss on writing skills. output collaborat...

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