scholarly journals A mean-value performance analysis of a new multiprocessor architecture

1988 ◽  
Vol 16 (1) ◽  
pp. 167-176
Author(s):  
S. T. Leutenegger ◽  
M. K. Vernon
Keyword(s):  
Performance Analysis ◽  
Mean Value ◽  
Multiprocessor Architecture

scholarly journals Performance Analysis of the Impact of Rain Attenuated Signal on Mobile Cellular Terrestrial Links in Jos, Nigeria

2020 ◽  
pp. 14-26
Author(s):  
O. J. Igbekele ◽  
B. J. Kwaha ◽  
E. P. Ogherohwo ◽  
J. T. Zhimwang
Keyword(s):  
Performance Analysis ◽  
Mobile Network ◽  
Mean Value ◽  
Temperate Climate ◽  
Radio Link ◽  
Clear Sky ◽  
Mobile Cellular ◽  
Microwave Radio ◽  
Induced Signal ◽  
The Impact

The 12 to 18 GHz frequency bands are commonly deployed for mobile network metropolitan microwave radio links using small antennas and low transmit power to deliver high channel capacities. Jos Plateau region with the blend of tropical and temperate climate is characterized with high severe rain impairment on terrestrial links operating at frequencies above 10 GHz, for mobile network backhaul system remaining a big challenge in the design of a microwave radio link. Therefore, this study presents the performance analysis of the impact of rain attenuated signal on mobile cellular terrestrial links in Jos under clear sky and rain condition. The cell site locations were divided in two clusters of Jos lowland and Jos highland. Drive test tools, radio local monitor terminal (LMT) and Davis weather station were employed over radio links interconnecting live 2G/3G nodal network, for the measurement of the mean value of one minute rainfall rates and the corresponding rain-induced signal. The results obtained revealed that more budget provision was obtained by the study calculation in over 60% of the study centers. More so, when the study fade margin estimation was put to test, up to 4.27 Mbps download speed was achieved, the speed almost as high as the highest speed, 4.29 Mbps recorded under the clear sky for ITU-R. More so, as low as 0.7% packet loss was recorded against the study link margin budget under same rain condition causing over 62.3% for PLA010 in Jos lowland cluster. Also, instances of slight under-budgeting were observed in highland clusters PLA064 and PLA025 as 35.01 dB and 34.99 dB respectively when tested with the Study calculated values.

Approximate mean value performance analysis of cyclic queueing networks with production blocking

1994 ◽  
Vol 16-16 (1-2) ◽  
pp. 139-165 ◽  
Author(s):  
Li Zhuang ◽  
John A. Buzacott ◽  
Xiao -Gao Liu
Keyword(s):  
Performance Analysis ◽  
Queueing Networks ◽  
Mean Value

Long-period modulated superstructures in Pd-12.5 at.%Ce and Pd-15 at.%Ce alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 164-165
Author(s):  
Noriyuki Kuwano ◽  
Masaru Itakura ◽  
Kensuke Oki
Keyword(s):  
Electron Microscopy ◽  
Mean Value ◽  
Heavy Elements ◽  
Arc Furnace ◽  
X Ray ◽  
Long Period ◽  
Ultra High Purity ◽  
Heat Treated ◽  
Atomic Scattering ◽  
The Mean

Pd-Ce alloys exhibit various anomalies in physical properties due to mixed valences of Ce, and the anomalies are thought to be strongly related with the crystal structures. Since Pd and Ce are both heavy elements, relative magnitudes of (fcc-fpd) are so small compared with <f> that superlattice reflections, even if any, sometimes cannot be detected in conventional x-ray powder patterns, where fee and fpd are atomic scattering factors of Ce and Pd, and <f> the mean value in the crystal. However, superlattices in Pd-Ce alloys can be analyzed by electron microscopy, thanks to the high detectability of electron diffraction. In this work, we investigated modulated superstructures in alloys with 12.5 and 15.0 at.%Ce.Ingots of Pd-Ce alloys were prepared in an arc furnace under atmosphere of ultra high purity argon. The disc specimens cut out from the ingots were heat-treated in vacuum and electrothinned to electron transparency by a jet method.

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