نتایج جستجو برای: fss
تعداد نتایج: 1560 فیلتر نتایج به سال:
OBJECTIVE We wished to clarify whether the osteopenia reported in adult men with a history of constitutional delay of growth and puberty (CDGP) could be due to the delayed puberty or an independent predisposition to osteoporosis in this condition. DESIGN Short prepubertal children with CDGP and children with familial short stature (FSS) were matched for height and other auxological variables....
BACKGROUND Mechanical stresses are known to play important roles in atherosclerotic plaque initiation, progression and rupture. It has been well-accepted that atherosclerosis initiation and early progression correlate negatively with flow wall shear stresses (FSS). However, mechanisms governing advanced plaque progression are not well understood. METHOD In vivo serial MRI data (patient follow...
It is acknowledged that in the trading of homogeneous goods there is persistent price dispersion. However, it is theoretically derived that if buyers are optimizers there is no price dispersion. This negative result motivates the emergence of alternative paths in the literature that studies price dispersion. In Burdett and Judd’s seminal work, buyers follow the sub-optimal fixed sample size sea...
Orthogonal Frequency Division Multiple Access (OFDMA) is a multi-user version of the Orthogonal Frequency Division Multiplexing (OFDM) transmission technique, which divides a wideband channel into a number of orthogonal narrowband subchannels, called subcarriers. An OFDMA system takes advantage of both frequency diversity (FD) gain and frequency-selective scheduling (FSS) gain. A FD gain is ach...
OBJECTIVE The objective of this study was to assess the effects of long-term offshore work on cerebral oxygenation oscillations in sailors based on the wavelet phase coherence (WPCO) of near-infrared spectroscopy (NIRS) signals. METHODS The fatigue severity scale (FSS) was first applied to assess the fatigue level of sailors and age-matched controls. Continuous recordings of NIRS signals were...
A fast and efficient multi-dimensional adaptive sampling method (ASM) based on Stoer-Bulirsch (S-B) algorithm for frequency selective surface (FSS) analysis and design is presented in this paper. The multivariate rational function is established according to the functional relation of the scattering parameters with frequency and direction of incident wave, medium parameters and geometry dimensi...
The properties of small finite size FSS for use particularly at long wavelengths are summarised. The intended use is the modification of the EM architecture of buildings at mobile radio frequencies. Introduction: At microwave and millimetre wave frequencies the physical sizes of Frequency Selective arrays are, in virtually all practical applications, large enough for the structures to be adequa...
In this paper, we propose a simple technique to analyze absorber/transmitter frequency selective surfaces (FSS). The structure is formed by two FSS, one resistive and conductive. Both FSS are printed on an FR4 dielectric substrate. square loop crossed dipole the geometries considered in paper. combines approaches, equivalent circuit method, scattering matrix method. Two prototypes were built fo...
The SYNTAX score (SS) was recently introduced to overcome the limitation of coronary angiography in the interpretation of multivessel coronary artery disease (MVD). The SS is an angiography-based scoring system that describes lesion complexity and correlates with clinical outcomes. However, angiographic assessment of MVD often overor underestimates the functional significance of MVD. A fraction...
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