نتایج جستجو برای: rotational work

تعداد نتایج: 974461  

Journal: :IACR Cryptology ePrint Archive 2015
Dmitry Khovratovich Ivica Nikolic Josef Pieprzyk Przemyslaw Sokolowski Ron Steinfeld

Rotational cryptanalysis is a probabilistic attack applicable to word oriented designs that use (almost) rotation-invariant constants. It is believed that the success probability of rotational cryptanalysis against ciphers and functions based on modular additions, rotations and XORs, can be computed only by counting the number of additions. We show that this simple formula is incorrect due to t...

Journal: :تحقیقات مهندسی کشاورزی 0
هیمن امیری دانشجوی دکتری مکانیک ماشین های کشاورزی محمدحسین کیانمهر دانشیار گروه مکانیک ماشینهای کشاورزی پردیس ابوریحان، دانشگاه تهران اکبر عرب حسینی دانشیار گروه مکانیک ماشین های کشاورزی پردیس ابوریحان، دانشگاه تهران نبی اله کشوری دانش آموخته کارشناسی ارشد مکانیک ماشین های کشاورزی، پردیس ابوریحان، دانشگاه تهران

agglomeration followed by pelleting is an efficient method to decrease transport costs and increase economic efficiency of composting municipal waste. the moisture content of compost is the most important parameter of the pellet making process for any type of manufacturing device. the experiments in this study were done at moisture contents of 35%, 45% and 50% at extruder shaft rotational speed...

Journal: :مهندسی بیوسیستم ایران 0
جلیل تقی زاده طامه پردیس کشاورزی و منابع طبیعی دانشگاه تهران- گروه مهندسی مکانیک بیوسیستم علی جعفری پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسین موسی زاده پردیس کشاورزی و منابع طبیعی دانشگاه تهران- گروه مهندسی مکانیک بیوسیستم نازیلا طربی پردیس کشاورزی و منابع طبیعی دانشگاه تهران- گروه مهندسی مکانیک بیوسیستم

organic manure plays an important role in the improvement of soil structure by decreasing bulk density and increasing porosity. however, the method of manure spreading influences its beneficial impact on soil structure. in this study, a novel helical manure distributor machine capable of spreading manure with different moisture contents at maximum distribution width was developed and the machin...

2008
J. C. Suárez R. Garrido A. Moya

Aims. In the present work, the effect of near-degeneracy on rotational Petersen diagrams (RPD) is analysed. Methods. Seismic models are computed considering rotation effects on both equilibrium models and adiabatic oscillation frequencies (including second-order near-degeneracy effects). Contamination of coupled modes and coupling strength on the first radial modes are studied in detail. Result...

ژورنال: مجله دندانپزشکی 1995
فاضل, اکبر , گلبیدی, فریبا ,

Normal 0 false false false EN-US X-NONE AR-SA The theory of designing partial prostheses with rotational path of insertion has been debated for years but most dentists do not consider this treatment method. In conventional partial prostheses, the rests have a single path of insertion while in rotational path of insertion, first the center of rotati...

ژورنال: علوم آب و خاک 2007
سحر فروغی‌نیا, , سلیمان عباسی, ,

Salab gum is a hydrocolloidal compound which can be extracted from detached roots, tubers as well as rhizomes of Orchidaceae family. Apart from its applications in pharmaceuticals it has many potential usages in foodstuffs particularly ice cream and local soft drinks. However, there is little evidence about its rheological properties in the literature. Therefore, in the present study, the influ...

Although segmental tunnel linings are often used for seismic areas, the influence of segment joints on the segmental lining behavior under seismic loading has not been thoroughly considered in the literature. This paper presents the results of a numerical study investigating the effects of the rotational, axial, and radial joint stiffness of the longitudinal joints on the structural force...

Journal: :The Journal of the Acoustical Society of America 2002
N H Fletcher A Z Tarnopolsky J C S Lai

Free rotational aerophones such as the bullroarer, which consists of a wooden slat whirled around on the end of a string, and which emits a loud pulsating roar, have been used in many ancient and traditional societies for ceremonial purposes. This article presents an experimental and theoretical investigation of this instrument. The aerodynamics of rotational behavior is elucidated, and relates...

2012
William H. Seitz Jinyoung Jeong Michael A. Mont Aaron J. Johnson

INTRODUCTION: Rotational malalignment following fracture of the distal radius may be under appreciated and contribute to subluxation and dysfunction of the distal radioulnar joint. Rotational malunion is demonstrated by both plain radiographic and CT imaging. METHODS: Eleven patients with shortened, angular and rotational malunion underwent correction by performance of triplane osteotomy. Addit...

Journal: :The Journal of chemical physics 2009
M Sun D J Clouthier L M Ziurys

The pure rotational spectrum of the CCAs radical in its ground electronic and spin state, X (2)Pi(12), has been measured using Fourier transform microwave techniques in the frequency range of 12-40 GHz. This species was created in a supersonic expansion from a reaction mixture of AsCl(3) and C(2)H(2) or CH(4) diluted in high pressure argon, using a pulsed nozzle containing a dc discharge source...

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