نتایج جستجو برای: نمونه u bend
تعداد نتایج: 330123 فیلتر نتایج به سال:
زمینه و هدف: درد یکی از عواملی است که حین قطع مصرف یک ماده افیونی یا کاهش در میزان مصرف آن ایجاد میشود. هدف از این تحقیق تعیین اثر تمرین ورزشی بر حالت هایپوآلژزی ایجاد شده توسط بتا اندورفین (bend) در افراد وابسته به مواد مخدر بود.موادها و روش ها: این تحقیق از نوع تحقیقات نیمه تجربی با طرح پیش و پس آزمون بود. نمونه آماری تحقیق را 20 آزمودنی وابسته به مواد مخدر تشکیل میدادند که در دو گروه تجرب...
We present a full-polymer respiratory monitoring device suited for application in environments with strong magnetic fields (e.g., during an MRI measurement). The sensor is based on the well-known evanescent field method and consists of a 1 mm plastic optical fiber with a bent region where the cladding is removed and the fiber is coated with poly-dimethylacrylamide (PDMAA). The combination of ma...
An Evaluation Method for Hydrogen Embrittlement of High Strength Steel Sheets Using U-bend Specimens
The paper deals with the corrosion behavior of stainless steels as candidate materials for biofuel production plants by liquefaction process of the sorted organic fraction of municipal solid waste. Corrosion tests were carried out on AISI 316L and AISI 304L stainless steels at 250 °C in a batch reactor during conversion of raw material to bio-oil (biofuel precursor), by exposing specimens eithe...
In this research, the effect of installing position of bridge pier on scouring depth was studied in a bend laboratory flume, which is made of Plexiglas with 180 bend and a relative radius of Rc/B=4.7. Tests were conducted using one pier 6 cm in diameter under four discharge conditions with constant depth of 12 cm and clear-water conditions. Flume bed was fully paved by uniform sand. It was foun...
this paper presents a numerical study of local mass transfer coefficients in a 90° bend using the rng version of k–e model to include the influence of curvature on the turbulent transport. simulations were performed for flow through a 90°, 3-d bend for reynolds numbers of 13500, 90000, and 390000, schmidt numbers of 2.53 and 700 and curvature ratios of 1.5, 2, and 2.5. the differences between t...
During V(D)J recombination, recombination activating gene proteins RAG1 and RAG2 generate DNA double strand breaks within a paired complex (PC) containing two complementary recombination signal sequences (RSSs), the 12RSS and 23RSS, which differ in the length of the spacer separating heptamer and nonamer elements. Despite the central role of the PC in V(D)J recombination, little is understood a...
In the present research, the laminar forced convective heat transfer and fluid flow characteristics for Al2O3-water nanofluid flowing in different bend (i.e., 180o and 90o) pipes have been investigated numerically in a three-dimensional computational domain using the finite volume technique. The effects of different pertinent parameters, such as the Reynolds number of the duct, volume fraction ...
The swirling secondary flow in curved pipes is studied three-space dimensions using a weakly compressible Smoothed Particle Hydrodynamics (WCSPH) formulation coupled to new non-reflecting outflow boundary conditions. A large-eddy simulation (LES) model for turbulence benchmarked with existing experimental data. After validation of the present against results 90 grades pipe bend, detailed numeri...
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