Filters: Date: "2006-06" Collection: ir_uspace
1 - 25 of 7
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
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Zhdanov, Michael S. | Fast numerical modeling of multitransmitter electromagnetic data using multigrid quasi-linear approximation | Multitransmitter electromagnetic (EM) surveys are widely used in remote-sensing and geophysical exploration. The interpretation of the multitransmitter geophysical data requires numerous three-dimensional (3-D) modelings of the responses of the receivers for different geoelectrical models of comple... | Multitransmitter electromagnetic data; Numerical modeling; Multigrid quasi-linear approximation; Quasilinear approximation; geophysical exploration; 3-D modeling | 2006-06 |
| 2 |
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Zimmer, Zachary | Impact of past conflicts and social disruption on the elderly in Cambodia | Cambodia experienced violence during the rule of the Khmer Rouge in the 1970s. Many who died were the children or spouses of today's elderly. This may have resulted in an erosion of family support in a country where formal channels of assistance are virtually absent. This article examines the extent... | Cambodia; Elderly; Social Disruption; Conflicts; Poverty | 2006-06 |
| 3 |
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Furse, Cynthia M. | Invisible fray: a critical analysis of the use of reflectometry for fray location | Significant international research and development efforts have been devoted to methods and equipment for locating wiring faults, particularly those on aging aircraft. Several reflectometry methods that send high frequency signals down the line and analyze the returned reflections have risen to the... | Reflectometry; Fray location; Invisible fray; Fault location; Aging wiring; Spread spectrum reflectometry | 2006-06 |
| 4 |
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Furse, Cynthia M. | Multicarrier reflectometry | A new reflectometry method called multicarrier reflectometry (MCR) for fault location in cables is proposed. MCR combines a weighted set of sinusoidal excitations into a signal that is sent down the wire. The reflected signal from the cable under test is analyzed in order to determine the length of ... | Multicarrier reflectometry; MCR; Fault location | 2006-06 |
| 5 |
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Liu, Feng | Origin of intergranular embrittlement of Al alloys induced by Na and Ca segregation: grain boundary weakening | Using a first-principles computational tensile test, we show that the ideal tensile strength of an Al grain boundary (GB) is reduced with both Na and Ca GB segregation. We demonstrate that the fracture occurs in the GB interface, dominated by the break of the interfacial bonds. Experimentally, we f... | Intergranular embrittlement; Grain boundary; Intergranular fracture | 2006-06 |
| 6 |
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Mishchenko, Eugene; Raikh, Mikhail E. | Penetration of external field into regular and random arrays of nanotubes: implications for field emission | We develop an analytical theory of polarization of a vertically aligned array of carbon nanotubes (NTs) in external electric field. Such arrays are commonly utilized in field-emission devices, due to the known electrostatic effect of strong field enhancement near the tip of an individual NT. A sma... | Field-emission current; Fowler-Nordheim law | 2006-06 |
| 7 |
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Couldwell, William T. | Pituitary apoplexy in the magnetic resonance imaging era: clinical significance of sphenoid sinus mucosal thickening | Object. The authors report their experience with pituitary apoplexy and evaluate the clinical significance of sphenoid sinus mucosal thickening found on magnetic resonance (MR) imaging. Methods. The cases of 28 patients (19 males and nine females) with pituitary apoplexy were reviewed retrospectiv... | 2006-06 |
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