Terminal and repeater equipment for the first operational wave-guide system

1977 ◽  
Vol 47 (11) ◽  
pp. 489
Author(s):  
N.D. Kenyon
Keyword(s):  
Wave Guide ◽  
Guide System

Scattering by a semi-infinite resistive strip of dominant-mode propagation in an infinite rectangular wave-guide

1956 ◽  
Vol 52 (3) ◽  
pp. 553-563 ◽  
Author(s):  
V. M. Papadopoulos
Keyword(s):  
Electric Field ◽  
Digital Computer ◽  
Transverse Electric ◽  
Dominant Mode ◽  
Surface Resistivity ◽  
Wave Guide ◽  
Mode Propagation ◽  
Rectangular Wave ◽  
Electric Mode ◽  
Transverse Electric Mode

ABSTRACTThe scattering of the dominant transverse electric mode in an infinite perfectly conducting rectangular wave-guide by a semi-infinite resistive strip, centrally placed and parallel to the electric field, is calculated by the use of Laplace transforms. Formulae are derived for the amplitude of the scattered waves, and the numerical results, obtained using a digital computer, are given for various values of the surface resistivity of the strip.

Two Stage Gain Magnification in Beam Wave Guide Feed of Indian Deep Space Network (IDSN-32) Station

2012 ◽  
Vol 60 (7) ◽  
pp. 3481-3484
Author(s):  
V. V. Srinivasan ◽  
C. Kumar ◽  
D. Bhatnagar ◽  
V. K. Lakshmeesha ◽  
S. Pal
Keyword(s):  
Wave Guide ◽  
Deep Space ◽  
Two Stage ◽  
Deep Space Network ◽  
Beam Wave ◽  
Space Network

scholarly journals Using Operational Analysis to Improve Access to Pulmonary Function Testing

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Ada Ip ◽  
Raymond Asamoah-Barnieh ◽  
Diane P. Bischak ◽  
Warren J. Davidson ◽  
W. Ward Flemons ◽  
...  
Keyword(s):  
Pulmonary Function ◽  
Pulmonary Function Testing ◽  
Financial Investment ◽  
Process Improvements ◽  
Operational Analysis ◽  
Healthcare Settings ◽  
Stakeholder Perspectives ◽  
Poor Access ◽  
Guide System ◽  
Function Testing

Background. Timely pulmonary function testing is crucial to improving diagnosis and treatment of pulmonary diseases. Perceptions of poor access at an academic pulmonary function laboratory prompted analysis of system demand and capacity to identify factors contributing to poor access.Methods. Surveys and interviews identified stakeholder perspectives on operational processes and access challenges. Retrospective data on testing demand and resource capacity was analyzed to understand utilization of testing resources.Results. Qualitative analysis demonstrated that stakeholder groups had discrepant views on access and capacity in the laboratory. Mean daily resource utilization was 0.64 (SD 0.15), with monthly average utilization consistently less than 0.75. Reserved testing slots for subspecialty clinics were poorly utilized, leaving many testing slots unfilled. When subspecialty demand exceeded number of reserved slots, there was sufficient capacity in the pulmonary function schedule to accommodate added demand. Findings were shared with stakeholders and influenced scheduling process improvements.Conclusion. This study highlights the importance of operational data to identify causes of poor access, guide system decision-making, and determine effects of improvement initiatives in a variety of healthcare settings. Importantly, simple operational analysis can help to improve efficiency of health systems with little or no added financial investment.

Wavelength and threshold current variation in inhomogeneously pumped InGaAs/AlGaAs single and double quantum well ridge wave-guide lasers

1992 ◽  
Vol 70 (10-11) ◽  
pp. 908-913
Author(s):  
K. A. McGreer ◽  
D. Moss ◽  
R. L. Williams ◽  
M. Dion ◽  
D. Landheer
Keyword(s):  
Quantum Well ◽  
Threshold Current ◽  
Wave Guide ◽  
Double Quantum ◽  
Wavelength Shift ◽  
Exponential Dependence ◽  
Lasing Wavelength ◽  
Output Wavelength ◽  
Double Quantum Well ◽  
Current Variation

We investigate the wavelength and threshold current variation with passive wave-guide length in inhomogeneously pumped single and double quantum well InGaAs/AlGaAs strained layer ridge wave-guide lasers. We observe a linear and extremely low increase in threshold current with unpumped length, both for single and double quantum well lasers. A large red shift in the lasing wavelength as the unpumped length is increased is also observed. We present a model, based on absorption saturation in the unpumped section, which describes both the wavelength shift and the threshold current variation. The increase in threshold current that we observe is much smaller than results reported in the literature for GaAs/AlGaAs lasers, where a large exponential dependence was attributed to gain saturation in the pumped section. Because the threshold current does not dramatically vary with unpumped length for our lasers, this is a potentially useful technique for shifting the output wavelength of the laser. Finally, we investigate the wavelength tuning behavior of lasers having two segments pumped with different currents. A wavelength tunability of ~13 nm for the DQW laser was observed.

scholarly journals External cooling efficiently controls intraosseous temperature rise caused by drilling in a drilling guide system: an in vitro study

2015 ◽  
Vol 53 (10) ◽  
pp. 963-967 ◽  
Author(s):  
Kristof Boa ◽  
Endre Varga ◽  
Gabor Pinter ◽  
Akos Csonka ◽  
Istvan Gargyan ◽  
...  
Keyword(s):  
Temperature Rise ◽  
In Vitro Study ◽  
Vitro Study ◽  
External Cooling ◽  
Guide System

Kinetics Study of Aluminum Deposition on Inner Wall of Pipes by Atomic Layer Deposition

2012 ◽  
Vol 482-484 ◽  
pp. 627-632
Author(s):  
Heng Liu ◽  
Yu Qing Xiong ◽  
Ji Zhou Wang
Keyword(s):  
Crystal Structure ◽  
Atomic Layer Deposition ◽  
Gas Adsorption ◽  
Atomic Layer ◽  
Wave Guide ◽  
Kinetics Study ◽  
Kinetics Equation ◽  
Deposition Cycle ◽  
Layer Deposition ◽  
Aluminum Deposition

In this paper, feasibility of aluminium deposition on inner wall of pipes by atomic layer deposition was studied. Firstly, by solving kinetics equation of gas adsorption on the pipe inner wall, the time for the reactant to reach saturated adsorption on the wall was calculated. Secondly, according to the aluminium crystal structure, the thickness of each deposition cycle was obtained. Finally, the minimum aluminium thickness and number of atomic layer deposition cycles that can meet electromagnetic requirement of wave guide was calculated.

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