نتایج جستجو برای: rotation

تعداد نتایج: 72251  

 Background: Excessive lumbar vertebrae translation and rotation in sagittal plane has been attributed as an associated factor of lumbar segmental instability (LSI) and low back pain (LBP). Reduction of these abnormalities improves back pain. The aim of this study was to investigate the effect of core stability exercise on the translation and rotation of lumbar vertebrae in sagittal plan...

Background & Aims: Previous studies have stated that the scapulohumeral rhythm dysfunction can make a person prone to glenohumeral joint pathologies. The purpose of this study was to survey symmetric resting scapular posture and scapulohumeral rhythm ratio between dominant and non-dominant shoulders in elderly subjects in different humeral abduction angles. Materials & Methods: Thirty-five hea...

Journal: :journal of agricultural science and technology 2015
t. pandiaraj s. selvaraj n. ramu

the objective of this study was to investigate the effects of addition of pulses in crop sequences, crop residue management, and application of fertilizer n on soil nitrogen content, soil organic carbon, nutrient uptake, and its consequences for wheat yields. the field experiments were carried out from 2009 to 2012 in the sub-humid and sub-tropical zone of northern india. the treatments were (i...

A field experiment was conducted to evaluate the yield and chemical composition of triticalegrain in different crop rotation and tillage systems. The first experimental factor was thecropping system – a) crop rotation and b) monoculture and the second factor was the tillagesystem – 1) conventional (CT), 2) reduced (RT) and 3) no-tillage (NT). The spring triticale yieldwas found to be 15.4% high...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
William B Sparks James Hough Thomas A Germer Feng Chen Shiladitya DasSarma Priya DasSarma Frank T Robb Nadine Manset Ludmilla Kolokolova Neill Reid F Duccio Macchetto William Martin

The identification of a universal biosignature that could be sensed remotely is critical to the prospects for success in the search for life elsewhere in the universe. A candidate universal biosignature is homochirality, which is likely to be a generic property of all biochemical life. Because of the optical activity of chiral molecules, it has been hypothesized that this unique characteristic ...

Journal: :Physical review letters 2006
Fredrik Jonsson Christos Flytzanis

We show that the inclusion of nonlocality in the constitutive relations in photonic structures has important repercussions in their eigenmode configuration and distribution. In the case of optical activity, the primary manifestation of nonlocality, these features are traced to a photospin-orbit interaction analogous to the electron spin-orbit interaction in asymmetric semiconducting compounds; ...

Journal: :SIAM J. Math. Analysis 2000
Shaobo Gan Meirong Zhang

In this paper, we use the rotation number approach to study in detail the characteristic values of Hill’s equations with two-step periodic potentials. As a result, the global structure of resonance pockets is described completely. The results in this paper show that resonance pockets behave in a sensible and fairly rich way even in this simplest case.

Journal: :Physical review letters 2006
Ambarish Ghosh Peer Fischer

A light beam changes direction as it enters a liquid at an angle from another medium, such as air. Should the liquid contain molecules that lack mirror symmetry, then it has been predicted by Fresnel that the light beam will not only change direction, but will actually split into two separate beams with a small difference in the respective angles of refraction. Here we report the observation of...

2015
Qijun Wu Xun Gong

This study established a LabVIEW-based virtual instrument system to measure optical activity through the communication of conventional optical instrument with computer via RS232 port. This system realized the functions for automatic acquisition, real-time display, data processing, results playback, and so forth. Therefore, it improved accuracy of the measurement results by avoiding the artifici...

2002
Peter J. Teuben

Two dimensional velocity fields have been an important tool for nearly 30 years and are instrumental in understanding galactic mass distributions and deviations from an ideal galactic disk. Recently a number of new instruments have started to produce more detailed velocity fields of the disks and nuclear regions of galaxies. This paper summarizes some of the underlying techniques for constructi...

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