نتایج جستجو برای: sectional area extending between any two specified levels
تعداد نتایج: 5772787 فیلتر نتایج به سال:
In order to determine the effect of Valsalva maneuver and head rotation on the internal jugular vein (IJV) diameter and cross-sectional area and overlap with the carotid artery (CA) and find the best technique for safe cannulation of the IJV and decrease the risk of CA puncture, the diameter of both the IJV and the CA and percentage of overlap between the two vessels and cross-sectional are...
BACKGROUND Central blood pressure (CBP) has been reported to be superior to brachial blood pressure (BP) as a cardiovascular risk predictor in hypertensive patients; however, the effects of antihypertensives on CBP have not been fully examined. This cross-sectional hypothesis-generating study aimed to tentatively characterize all classes of antihypertensives in relation to CBP. METHODS Calibr...
Estimating the Vocal-Tract Area Function From Formants Using a Sensitivity Function and Least Square
We present a method for estimating the vocal-tract area function from specified formant frequencies. The method extends the work of Story (J.A.S.A., 119, 715-718, 1996) based on a sensitivity function representing the change in the formant frequency due to a small perturbation of the cross-sectional area of the vocal tract. Our method estimates the vocal-tract shape through an iterative procedu...
We carried out an MRI study of the lumbar spine in 15 patients with achondroplasia to evaluate the degree of stenosis of the canal. They were divided into asymptomatic and symptomatic groups. We measured the sagittal canal diameter, the sagittal cord diameter, the interpedicular distance at the mid-pedicle level and the cross-sectional area of the canal and spinal cord at mid-body and mid-disc ...
Background and aims Musculoskeletal disorder is one of the biggest occupational health problems in workplaces of industries. According to the national statistics, the proportion of musculoskeletal diseases of all occupation diseases in the United States is 44% (Bureau of Labor Statistics, 1996). On the basis of report of National Institute Occupational Safety and Health of USA(NIOSH), WMSDs...
The present paper has attended to two prevalent concepts in todaychr('39')s management literature–organizational values and organizational ethics; two concepts that are used interchangeably. The aim of this study is clarifying the real for and against positions regarding these two concepts. The study is an exploratory one and in terms of purpose, it is an applied study. In terms of equivalent, ...
BACKGROUND In order to facilitate normal gait, toes require to be in a rectus position during the propulsive phase. This requires a correct balance and sequence of activity of the intrinsic musculature of the feet. Alteration of this balance and sequence may lead to the development of claw toes. Atrophy of the lumbricals occurs in the development of claw toes, but it is not known if changes occ...
One of the important issues in many of array systems such as Radar, Sonar, Mobile, and satellite telecommunications is the estimation of DOA of narrowband received signal. CRB is very important in evaluation of parameter estimation. CRB is the lower bound estimation error variance for any unbiased estimation. In this paper, the array antenna with equal distance arrays is extended in two separat...
for any educational program to be successful, many factors work hand in hand. based on pervious efl studies, teachers and learners are the keys to gain achievement. granted the fact that explicit and implicit practice plays a key role in education, knowledge of it can help teachers facilitate students’ vocabulary learning. this study investigated to determine the contribution of explicit and i...
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