نتایج جستجو برای: vacuum

تعداد نتایج: 47152  

2004
L. A. Trevisan A. E. Dorokhov Lauro Tomio

The nonlocal vacuum condensates or vacuum correlators describe the distribution of quarks and gluons in the nonperturbative QCD vacuum [1]. Physically, it means that vacuum quarks and gluons can flow through the vacuum with nonzero momentum. Nonlocal condensates play an important role in hadron physics. The nonlocal properties of the vacuum condensates are of principle importance in the study o...

شکوهی, رضا, یزدانی, لیلی,

Expansion of one dimensional collisionless plasma into vacuum is studied under different initial ions temperature. In this study, a simulation code is used, in which the electrons dynamic is determined by Vlasov equation and the ions dynamic is determined  by fluids equations. Finally, the effect of initial ions temperature on the expansion of plasma into vacuum is investigated and the obtained...

Journal: :Journal of dairy science 2016
J Besier R M Bruckmaier

Different levels of claw vacuum during machine milking may influence milking performance and teat condition. The claw vacuum acts on the teat and is responsible for removal and transport of milk but is also causing potential effects on the teat tissue. In the absence of milk flow, the claw vacuum is similar as the system vacuum. During milk flow, the claw vacuum drops to lower levels depending ...

Journal: :European Physical Journal C 2023

Abstract The recent developments related to the black hole information paradox have brought us a confusing object: replica wormhole. We are trying better understand object from viewpoint of thermo-mixed double and spontaneous symmetry breaking. In this paper, we show that wormhole can be regarded as transition between different degenerate vacua, corresponding gravitational partition function sh...

2006
M. E. Baldwin K. G. Carney A. L. Eldredge F. F. Hall W. B. Pierce G. I. Skoda

The three major vacuum systems serving the two-mile accelerator, the optical alignment system light pipe, and the beam switchyard (BSY) transport vacuum chambers are located as shown in Fig. 23-1. The accelerator vacuum system must maintain a very high vacuum in the accelerator to prevent RF electrical breakdown and electron scatter. Thirtytwo subsystems evacuate the accelerator to a design pre...

Journal: :journal of agricultural science and technology 2012
j. h. lee h. j. kim j. w. rhim

vacuum drying of salicornia herbacea l. was performed at different drying temperatures (50, 60, 70, and 80c) to evaluate the drying characteristics and the effect of drying temperatures on the quality of salicornia. as the drying temperature increased, the drying time decreased significantly (p< 0.05). the drying rate decreased with decrease in moisture content and increase in drying time. on ...

Journal: :علوم و تکنولوژی پلیمر 0
میراسد میرزاپور حسن رضایی حقیقت ابراهیم زنجیریان

industrial production of thermoset composite components involves the application of a vacuum bagging and autoclave pressure to minimize void percentage, usually to less than 5%. phenolic resin systems generate water as a reaction byproduct via condensation reactions during curing at elevated temperatures. in this paper, vacuum bagging and simple manufactured autoclave curing systems are used fo...

Journal: :علوم و تکنولوژی پلیمر 0
اعظم یوسفی علی اکبر یوسفی مهدی ارجمند

the polymeric and non-polymeric petrochemical wastes are environmentally unfavorable materials. we have to found a way to reuse these wastes in a safe manner. in styrene-butadiene rubber (sbr) production plant two major wastes are produced one is a fine rubber powder and the other is recycled n-methyl pyrrolidone (nmp). in high-density polyethylene (hdpe) production plant also a low molecular w...

Journal: :Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 2018

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