نتایج جستجو برای: atmospheric and geometric doppler

تعداد نتایج: 16861638  

2009
MICHIHIRO S. TESHIBA PHILLIP B. CHILSON ALEXANDER V. RYZHKOV TERRY J. SCHUUR ROBERT D. PALMER

A method is presented by which combined S-band polarimetric weather radar and UHF wind profiler observations of precipitation can be used to extract the properties of liquid phase hydrometeors and the vertical velocity of the air through which they are falling. Doppler spectra, which contain the air motion and/or fall speed of hydrometeors, are estimated using the vertically pointing wind profi...

Journal: :رادار 0
سید محمد ذبیحی مداح سید علیرضا سیدین

in this paper, by considering a squint angle for synthetic aperture radar in the strip-map mode, a method is proposed for estimating parameters of a fixed acceleration moving target. non-zero doppler centroid and range-azimuth coupling in the squint mode add complexity to estimation equations of moving target parameters and cause doppler ambiguity. this, in turn, causes to lose the efficiency o...

Journal: :iranian journal of radiology 0
masoud pezeshki rad school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran mahyar mohammadifard school of medicine, vascular and endovascular research center, imam reza hospital, birjand university of medical sciences, birjand, iran; chool of medicine, vascular and endovascular research center, imam reza hospital, birjand university of medical sciences, birjand, iran. tel: +98-5118414499, fax: +98-5612226898 hassan ravari school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran donya farrokh school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran emad ansaripour school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran elena saremi school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran

results color doppler usg had a sensitivity of 95% and specificity of 98% in diagnosis of arterial injury. positive and negative predictive values of doppler usg were 92.5% and 94.2%, respectively. conclusions color doppler usg can be used as a reliable modality with acceptable sensitivity and specificity values to screen hemodynamically stable patients with limb trauma suspicious for arterial ...

The Moldavian dragonhead (Dracocephalum moldavica L., Lamiaceae) is an annual medicinal plant with beneficial nutritional sources that plays important roles in human and animal feed. Nanoparticles and cold atmospheric plasma increase biochemical compounds in plants. In this study, the effects of copper nanoparticles and cold atmospheric plasma on biochemical indices of the medicinal plant Draco...

Background: Prediction of adverse perinatal and postnatal outcomes could be possible by using ultrasound Doppler evaluation, however there are some controversies regarding this issue in the literature. The goal of present study was to evaluate predictive value of Doppler indices in single and twin pregnancies during second trimester. Materials and Methods: This prospective study was conducted i...

Journal: :Biomechanics and modeling in mechanobiology 2002
Q Sun R Z Gan K-H Chang K J Dormer

The objective of this study was to produce an improved finite element (FE) model of the human middle ear and to compare the model with human data. We began with a systematic and accurate geometric modeling technique for reconstructing the middle ear from serial sections of a freshly frozen temporal bone. A geometric model of a human middle ear was constructed in a computer-aided design (CAD) en...

2016
Bianca P. Santarosa Danilo O.L. Ferreira Alexandra F. Belotta Adriano Dias Maria J. Mamprim Roberto C. Gonçalves

Santarosa B.P., Ferreira D.O.L., Belotta A.F., Dias A., Mamprim M.J. & Gonçalves R.C. 2016. B-Mode and pulsed Doppler sonography of kidney in healthy sheep according to age. Pesquisa Veterinária Brasileira 36(6):545-550. Departamento de Clínica Veterinária, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Campus Botucatu, Distrito de Rubião Junior s/n, Botucatu, SP...

حسینی, فاطمه, غفوری, مهیار, نارویی‌نژاد, مینو ,

    Background & Aim: Doppler ultrasonography is important in diagnosis of renal diseases by demonstrating vascular anatomy and hemodynamics. There is not any fix doppler indices in all of the references and it is suggested that each center should have its own standards. Also it is proved that biologic indices are not the same in different societies. The present study was performed on normal Ir...

Background: Diagnostic ultrasound has been used to detect human disease especially fetus abnormalities in recent decades. Although the harmful effects of diagnostic ultrasound on human have not been established so far, several researchers showed it has had bioeffects in cell lines and in experimental animals. Three-dimensional (3D), four-dimensional (4D), and color Doppler sonography are new te...

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