Regression models of ultra wideband ground reflection path loss based on peak power loss

2007 ◽  
Author(s):  
Pichaya Supanakoon ◽  
Apiradee Pokang ◽  
Sathaporn Promwong ◽  
Suthichai Noppanakeepong ◽  
Jun-ichi Takada
Keyword(s):  
Power Loss ◽  
Regression Models ◽  
Peak Power ◽  
Path Loss ◽  
Ultra Wideband

Ground Reflection Path Loss Based on Average Power Loss for Ultra Wideband Communications

2007 ◽  
Author(s):  
Pichaya Supanakoon ◽  
Sarunya Kaewsirisin ◽  
Sathaporn Promwong ◽  
Suthichai Noppanakeepong ◽  
Jun-ichi Takada
Keyword(s):  
Power Loss ◽  
Average Power ◽  
Path Loss ◽  
Ultra Wideband ◽  
Wideband Communications

Method to Estimate Impulse-Radio Ultra-Wideband Peak Power

2011 ◽  
Vol 59 (4) ◽  
pp. 1174-1186 ◽  
Author(s):  
H W Pflug ◽  
J Romme ◽  
K Philips ◽  
H de Groot
Keyword(s):  
Peak Power ◽  
Impulse Radio ◽  
Ultra Wideband

Power loss is attenuated following a second bout of high intensity eccentric contractions due to the repeated bout effect’s protection of rate of torque and velocity development

2020 ◽  
Author(s):  
Avery Hinks ◽  
Adam Hess ◽  
Mathew I. B. Debenham ◽  
Jackey Chen ◽  
Nicole Mazara ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Eccentric Exercise ◽  
High Intensity ◽  
Power Loss ◽  
Peak Power ◽  
Eccentric Contractions ◽  
Peak Power Output ◽  
Repeated Bout Effect ◽  
Maximum Voluntary Isometric Contraction ◽  
Repeated Bout

High intensity unaccustomed eccentric contractions result in weakness and power loss due to fatigue and muscle damage. Through the repeated bout effect (RBE), adaptations occur, then damage and weakness are attenuated following a subsequent bout. However, it is unclear whether the RBE protects peak power output. We investigated the influence of the RBE on power production and estimated fatigue- and damage-induced neuromuscular impairments following repeated high-intensity eccentric contractions. Twelve healthy adult males performed 5 sets of 30 maximal eccentric elbow flexions and repeated an identical bout 4 weeks later. Recovery was tracked over 7 days following both bouts. Reduced maximum voluntary isometric contraction torque, and increased serum creatine kinase and self-reported soreness indirectly inferred muscle damage. Peak isotonic power, time-dependent measures—rate of velocity development (RVD) and rate of torque development (RTD)—and several electrophysiological indices of neuromuscular function were assessed. The RBE protected peak power, with a protective index of 66% 24 hours after the second eccentric exercise bout. The protection of power also related to preserved RVD (R2=0.61, P<0.01) and RTD (R2=0.39, P<0.01). Furthermore, the RBE’s protection against muscle damage permitted the estimation of fatigue-associated neuromuscular performance decrements following eccentric exercise. Novelty Bullets • The repeated bout effect protects peak isotonic power. • Protection of peak power relates to preserved rates of torque and velocity development, but more so rate of velocity development. • The repeated bout effect has little influence on indices of neuromuscular fatigue.

scholarly journals Experimental Characterization of Ultra-Wideband Channel Parameter Measurements in an Underground Mine

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
B. Nkakanou ◽  
G. Y. Delisle ◽  
N. Hakem
Keyword(s):  
Underground Mining ◽  
Path Loss ◽  
Measurement Procedure ◽  
Ultra Wideband ◽  
Small Scale ◽  
Scale Parameters ◽  
Channel Parameter ◽  
Channel Parameters ◽  
Uwb Channel

Experimental results for an ultra-wideband (UWB) channel parameters in an underground mining environment over a frequency range of 3 GHz to 10 GHz are reported. The measurements were taken both in LOS and NLOS cases in two different size mine galleries. In the NLOS case, results were acquired for different corridor obstruction angles. The results were obtained during an extensive measurement campaign in the UWB frequency, and the measurement procedure allows both the large- and small-scale parameters such as the path loss exponent, coherence bandwidth, and so forth, to be quantified. The capacity of the UWB channel as a function of the physical depth of the mine gallery has also been recorded for comparison purposes.

Path Loss Expressions of Ultra Wideband Ground Reflection Channel

2006 ◽  
Author(s):  
Sathit Aroonpraparat ◽  
Pichaya Supanakoon ◽  
Sathaporn Promwong ◽  
Jun-ichi Takada
Keyword(s):  
Path Loss ◽  
Ultra Wideband
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