784 research outputs found
A Study of the Reliability of Electronic Components in a Nuclear-radiation Environment Twelfth Quarterly Report, Oct. 1 - Dec. 31, 1965
Total radiation dose and failure modes given for semiconductor devices exposed to neutron and gamma irradiatio
The revised test procedure for jpl test no. 617, phase ii to jet propulsion laboratory final report
Test procedures for reliability of electronic components in nuclear radiation environmen
The effect of radiation on electrical insulating materials
Radiation effects on electrical insulating material
Radiation effects design handbook. Section 3 - Electrical insulating materials and capacitors
Steady state radiation effects on electrical insulating materials and capacitors - handboo
A study of the reliability of electronic components in a nuclear-radiation environment Eleventh quarterly report, Jul. 1 - Sep. 30, 1965
Life tests on capacitors, diodes, controlled rectifiers, and transistors in nuclear radiation environmen
A study of the reliability of electronic components in a nuclear radiation environment. Volume II - The revised test procedure
Test procedures for program to determine reliability of electronic components in nuclear radiation environmen
High resolution study of associated C IV absorption systems in NGC 5548
We present the results of a careful analysis of associated absorption systems
toward NGC 5548. Most of the well resolved narrow components in the associated
system, defined by the Lyman alpha, C IV and N V profiles, show velocity
separation similar (to within 10~\kms) to the C IV doublet splitting. We
estimate the chance probability of occurrence of such pairs with velocity
separation equal to C IV doublet splitting to be . Thus it is
more likely that most of the narrow components are line-locked with C IV
doublet splitting. This will mean that the radiative acceleration plays an
important role in the kinematics of the absorbing clouds. We build grids of
photoionization models and estimate the radiative acceleration due to all
possible bound-bound transitions. We show that the clouds producing absorption
have densities less than , and are in the outer regions of the
broad emission line region (BLR). We note that the clouds which are line-locked
cannot produce appreciable optical depths of O VII and O VIII, and hence cannot
be responsible for the observed ionized edges, in the soft X-ray. We discuss
the implications of the presence of optically thin clouds in the outer regions
of the BLR to the models of broad emission lines.Comment: 21 pages, latex (aasms4 style), incluedes 4 ps figures. To appear in
Astrophysical Journa
The burden of cardiovascular disease in sub-Saharan Africa
Correspondence: The burden of cardiovascular disease in sub-Saharan Africa by Anthony Mbewu
- …