Results 251 to 260 of about 18,121,258 (292)
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Resistance modulation effect in n-well CMOS
IEEE Transactions on Electron Devices, 1985The characteristics of n-well CMOS latchup have been measured and quantitatively analyzed. It was found that the resistance of the substrate and of the well modulated by minority-carrier injection from the emitter of the parasitic bipolar transistors, and that the latchup trigger current was about two times larger than that calculated without the ...
Y. Niitsu +3 more
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Time Dependent Well Resistance Factor of PVD
Marine Georesources & Geotechnology, 2011As the conventional equations of radial consolidation with PVD assume a constant well resistance with time, an appropriate in-situ consolidation curve cannot be predicted. In this study, small cylinder cell tests are performed to evaluate the discharge capacity of PVD.
Raehyun Kim +3 more
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Resistivity Measurement in Anisotropic Horizontal Carbonate Wells
Proceedings of Abu Dhabi International Petroleum Exhibition and Conference, 1996Abstract Conventional resistivity tools run in horizontal wells give misleading readings in highly anisotropic formations. These tools are designed to read beyond the invaded zone to obtain true resistivity of the formation. While this design feature is an advantage in vertical or deviated wells, it leads to errors in anisotropic ...
A. Al-Riyami, D. Boyd, N. Dajani
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Erosion Resistance of Sand Screens in Gas Wells
SPE Asia Pacific Oil and Gas Conference and Exhibition, 2018Abstract A few cased-hole gas wells in Southeast Asia that were initially completed without any sand control are now producing sand, and the operators want to remediate these wells via standalone sand screen inside the production tubing. In these wells, the fluid (gas/sand) produced through the perforations would impinge rather directly ...
Deepak Kumar +2 more
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Radius of investigation in DC resistivity well logging
Geophysics, 1971Abstract The contribution to the measured signal of any desired portion of the ground (as distinct from that of the rest of the ground) in a direct current (dc) well logging system can be computed by using the equivalence between dc and electrostatic fields.
A. Roy, R. L. Dhar
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On modeling a well casing for resistivity and induced polarization
Geophysics, 1984Abstract In a previous communication I proposed an analytical model to simulate the electromagnetic (EM) and induced polarization (IP) response of a metal well casing (Wait, 1983). To facilitate the analysis, the earth was idealized as a homogeneous conducting half-space of electrical properties (σ, ε, μ).
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On the structure of well-conditioned positive resistance networks
Proceedings of the 33rd Midwest Symposium on Circuits and Systems, 2002The unique structural composition of a (N+1)-terminal positive resistance network, including the network center, is illustrated by the parallel connection of the original network and of its associated terminal weight number network. The network is said to be well-conditioned if and only if all its associated terminal weight numbers are non-positive ...
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Interpreting Resistivity Logs from Deviated Wells
69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007, 2007P093 Interpreting Resistivity Logs from Deviated Wells Q. Zhou* (Chevron) SUMMARY It is well known that logs especially the resistivity logs from a highly deviated well behave differently than those from a vertical well in the same reservoir. As more highly deviated wells are drilled in recent years correctly interpreting the measurements becomes ...
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Antibiotic resistance in the patient with cancer: Escalating challenges and paths forward
Ca-A Cancer Journal for Clinicians, 2021Amila Nanayakkara, David E Greenberg
exaly
Molecular mechanisms of antibiotic resistance revisited
Nature Reviews Microbiology, 2022Jessica M A Blair +2 more
exaly