نتایج جستجو برای: s waves

تعداد نتایج: 815483  

Journal: :Vision Research 1995
Donald C. Hood Artur V. Cideciyan Alejandro J. Roman Samuel G. Jacobson

The cellular basis of the hypersensitivity of the S (blue) cone system in patients with enhanced S cone syndrome was examined by analyzing ERGs from three patients. The patients had large alpha-waves in response to the blue and white flashes. These alpha-waves were shown to be driven nearly entirely by the S cones. Although these S cone alpha-waves were 4-6 times the size of the normal L/M cone...

Journal: :مجله دانشکده پزشکی دانشگاه علوم پزشکی تهران 0
حجت اله علایی h alaie علی رضا کمکی ar komaki

brain's waves are produced by spontaneous activity of neurons. these waves are changed by neurotransmitters in the central nervous system (cns). concentration of these neurotransmitters can be changed by various drugs and total power of brain waves also increase or decrease by these drugs. in this research effect of quinpirol and sulpiride on the brain waves was investigated. male wistar r...

2011
A. J. McDonald R. E. Hibbins M. J. Jarvis

[1] This paper describes the use of EOS Microwave Limb Sounder (MLS) data to observe the field of traveling planetary waves with quasi 16 day periods. This study utilizes MLS v2.2 temperature and geopotential data between 1 January 2005 and 31 December 2008 in the range 316 hPa to 0.001 hPa (approximately 8 to 97 km) to examine these waves. Analysis demonstrates that the quasi 16 day wavefield ...

2004
S. Suzuki K. Shiokawa Y. Otsuka T. Ogawa

An all-sky airglow imager with a cooled-CCD camera, in place at Darwin (12.4◦S, 131.0◦E), Australia, since October 2001, has been used to obtain two-dimensional gravity wave images in the mesopause region. Using airglow images of the OI (557.7 nm, emission altitude ∼96 km) and OH-band (720-910 nm, ∼86 km) emissions obtained for October 2001 to August 2002, we investigated the wavelengths, phase...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2002
Roel Snieder

Multiple-scattered waves usually are not useful for creating deterministic images of the interior of elastic media. However, in many applications, one is not so much interested in making a deterministic image as in detecting changes in the medium. Cases in point are volcano monitoring and measuring the change in hydrocarbon reservoirs during enhanced recovery operations. Coda wave interferometr...

2010
F. Duret Z. Cao V. Levin P. Molnar S. Roecker

[1] Recordings in western Tibet of Rayleigh and Love waves at periods less than 70 s from aftershocks of the 2008 Sichuan earthquake cannot be matched by an isotropic velocity model beneath Tibet. These intermediate‐period Rayleigh and Love waves require marked radial anisotropy in the middle crust of Tibet, with the vertically polarized S‐ waves propagating more slowly than S‐waves with horizo...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2007
A Shvartsburg V Kuzmiak G Petite

Reflection-refraction properties of photonic barriers, formed by dielectric gradient nanofilms, for inclined incidence of both S - and P -polarized electromagnetic waves are examined by means of exactly solvable models. We present generalized Fresnel formulas, describing the influence of the nonlocal dispersion on the reflectance and transmittance of single- and double-layer gradient photonic b...

2002
John J. Quinn Arkadiusz Wójs

If the Zeeman energy is small, the lowest energy excitations of a two dimensional electron gas at filling factor ν = 1 are spin waves (spin flip excitations). At ν slightly larger (smaller) than unity, reversed spin electrons (spin holes) can form bound states with K spin waves that are known as skyrmions, S− K (antiskyrmions, S K ). It is suggested in this work that a valence hole can also bin...

Journal: :iranian journal of medical physics 0
seyed vahab shojaedini iranian research organization for science and technology, tehran, iran

introduction in recent years methods based on radio frequency waves have been used for detecting breast cancer. using theses waves leads to better results in early detection of breast cancer comparing with conventional mammography which has been used during several years. materials and methods in this paper, a new method is introduced for detection of backscattered signals which are received by...

2002
REINALDO J. MICHELENA

s). “Quantifying errors in fracture orientations estimated from PS converted wave” by Michelena (SEG 1995 Expanded Abstracts). “Stratigraphic inversion of poststack PS converted waves data,” by Valenciano and Michelena (SEG 2000 Expanded Abstracts). “Tomography + prestack depth migration of PS converted waves” by D’Agosto et al. (SEG 1998 Expanded Abstracts). “Pand S-wave separation ats). “Pand...

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