نتایج جستجو برای: ground response curve

تعداد نتایج: 1223227  

Journal: :journal of biomedical physics and engineering 0
f golfam tarbiat modares university b hashemi tarbiat modares university a haeri nuclear science and technology research institute a nikoofar iran university of medical sciences

background: cytogenetic tests are usually used for diagnosing predisposed individuals to cancer by determining their lymphocyte radiosensitivity. objective: to determine the potential role of radiosensitivity in predisposition of prostate cancer by comparing lymphocyte radiosensitivity of prostate cancer patients with healthy donors. materials and methods: the blood samples of 10 prostate cance...

  In this study we investigated the bronchodilatory and anticholinergic effects of the aqueous extract (AE), brewed extract (BE) and ethanol extract (EE) of Polygonum avicular in comparison with saline (S) on isolated tracheal chains of the guinea pig. Due to the probable confounding effect of ethanol in the EE, the effects of this extract were also compared with 96 % ethanol. None of the plant...

Journal: :Ain Shams Engineering Journal 2022

To satisfy the requirements of performance-based design methods for a large number earthquake signals that contain series variable random variables, generation artificial seismic ground motion is necessary. statistics amplitudes’ instability in time domain, 500 recorded earthquakes have been divided into 5 groups by D5-95 durations and are statistically analyzed. For each group, its standard ti...

A. Esmaeili M. H. Djavareshkian,

Optimization of the sectional wing in ground effect (WIG) has been studied using ahigh order numerical procedure and response surface method (RSM). Initially, the effects of the ground clearance, angle of attack, thickness, and camber of wing have been investigated by a high-resolutionscheme, which is highlystrong and accurate. In the numerical simulation, Normalized Variable Diagram (NVD) sche...

2007
Alexei V. Tkachenko

We present a simple model which describes elastic response of single-stranded DNA (ssDNA) to stretching, including the regime of very high force (up to 1000 pN). ssDNA is modelled as a discreet persistent chain, whose ground state is a zigzag rather than a straight line configuration. This mimics the underlying molecular architecture and helps to explain the experimentally observed staturation ...

Journal: :iranian journal of pharmaceutical sciences 0
farzaneh boroumand department of biostatistics, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, iran alireza akbarzade baghban department of biostatistics, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, iran farid zayeri department of biostatistics, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, iran hediye faghir ghanesefat department of pharmacology, faculty of medicine, tehran university of medical sciences, tehran, iran

ignoring two main characteristics of the concentration-response data, correlation between observations and presence of outliers, may lead to misleading results. therefore the special method should be considered. in this paper in to examine the effect of phenylephrine in rat corpus cavernosum, outlier robust nonlinear mixed estimation is used. in this study, eight different doses of phenylephrin...

Journal: :فیزیک زمین و فضا 0
حمیدرضا جوان امروز گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران مرتضی اسکندری قادی دانشکده مهندسی عمران، پردیس دانشکده های فنی دانشگاه تهران نوربخش میرزائی گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران

ground vibrations during an earthquake can severely damage structures and equipments housed in them. many factors including earthquake magnitude, distance from the fault or epicenter, duration of strong shaking, soil condition of the site, and the frequency content of the motion define the properties of ground motion and its amplification. a deep understanding of the effects of these factors on...

Journal: :pollution 2015
ali ghanbari pouyan abbasi maedeh

regarding the importance of the prevention of hazards and adverse environmental impacts in industrial and populated areas such as southern parts of tehran city, the response of impulsive period ground-supported tanks were assessed. having considered the study area's soil properties, the response of ground-supported tanks was modelled. regarding the soil properties of southern parts of tehran, t...

Journal: :journal of structural engineering and geo-techniques 2012
m.h. jahangir

to evaluate the earth seismic response due to earthquake effects, ground response analyses are used to predict ground surface motions for development of design response spectra, to compute dynamic stresses and strains for evaluation of liquefaction hazards, and to determine the earthquake induced forces that can lead to instability of earth and earth-retaining structures. most of the analytical...

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