The Experts below are selected from a list of 222 Experts worldwide ranked by ideXlab platform
Annette M. Veilleux - One of the best experts on this subject based on the ideXlab platform.
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a comprehensive study of the seismicity of the kenai peninsula cook Inlet Region south central alaska
Bulletin of the Seismological Society of America, 2009Co-Authors: Diane I. Doser, Annette M. VeilleuxAbstract:Abstract We compare 30 yr of background seismicity of the Kenai Peninsula–Cook Inlet Region (extending from eastern Prince William Sound–Kayak Island to west of the Cook Inlet volcanic arc) to potential field (gravity, magnetics), tomographic, Global Positioning System–geodesy, and geologic information to better determine factors controlling seismicity. We also compare the occurrence of M w >5 events over the past 80–100 yr to background seismicity in an effort to determine how reflective background seismicity is of the Regional seismic hazard. Our results indicate that contrasts in upper plate rheology leading to changes in density, magnetic susceptibility, and velocity of the upper plate serve to concentrate seismicity. The southwestern edge of the subducting Yakutat microplate has a strong influence on both upper and lower plate seismicity. Density and velocity contrasts also indicate changes in lower plate rheology that influence the location of deeper (>30 km) seismicity and the occurrence of a double seismic zone within the subducting Pacific plate.
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A Comprehensive Study of the Seismicity of the Kenai Peninsula–Cook Inlet Region, South-Central Alaska
Bulletin of the Seismological Society of America, 2009Co-Authors: Diane I. Doser, Annette M. VeilleuxAbstract:Abstract We compare 30 yr of background seismicity of the Kenai Peninsula–Cook Inlet Region (extending from eastern Prince William Sound–Kayak Island to west of the Cook Inlet volcanic arc) to potential field (gravity, magnetics), tomographic, Global Positioning System–geodesy, and geologic information to better determine factors controlling seismicity. We also compare the occurrence of M w >5 events over the past 80–100 yr to background seismicity in an effort to determine how reflective background seismicity is of the Regional seismic hazard. Our results indicate that contrasts in upper plate rheology leading to changes in density, magnetic susceptibility, and velocity of the upper plate serve to concentrate seismicity. The southwestern edge of the subducting Yakutat microplate has a strong influence on both upper and lower plate seismicity. Density and velocity contrasts also indicate changes in lower plate rheology that influence the location of deeper (>30 km) seismicity and the occurrence of a double seismic zone within the subducting Pacific plate.
Zheng-guo Zhang - One of the best experts on this subject based on the ideXlab platform.
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Experimental Investigation on the Performances on the Shell Side of Shell-and-Tube Heat Exchangers with Multiparallel Channels
Industrial & Engineering Chemistry Research, 2011Co-Authors: Wen-liang Zeng, Zheng-guo ZhangAbstract:This paper presents an experimental investigation on the local surface heat-transfer coefficient on the shell side of a longitudinal-flow shell-and-tube heat exchanger with a multiparallel channel (MPC) Inlet and outlet. Under the conditions of with or without a fluid flow distributor (FDB) in the Inlet Region of the heat exchanger, some characteristics (such as the local Nussult number (Nu) distribution, local-mean Nu distribution, overall heat-transfer performance, and pressure drop) were investigated. The investigation results reveal the distribution of the local surface Nu value in the Inlet Region, and they give a reasonable mechanism analysis. It was suggested that not only the uniformity of both the fluid flow and the local Nu distribution was effectively improved by FDBs, but also that the global heat-transfer surface Nu value of the heat exchanger was enhanced by more than 10% with the pressure drop increasing slightly by FDBs.
Diane I. Doser - One of the best experts on this subject based on the ideXlab platform.
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a comprehensive study of the seismicity of the kenai peninsula cook Inlet Region south central alaska
Bulletin of the Seismological Society of America, 2009Co-Authors: Diane I. Doser, Annette M. VeilleuxAbstract:Abstract We compare 30 yr of background seismicity of the Kenai Peninsula–Cook Inlet Region (extending from eastern Prince William Sound–Kayak Island to west of the Cook Inlet volcanic arc) to potential field (gravity, magnetics), tomographic, Global Positioning System–geodesy, and geologic information to better determine factors controlling seismicity. We also compare the occurrence of M w >5 events over the past 80–100 yr to background seismicity in an effort to determine how reflective background seismicity is of the Regional seismic hazard. Our results indicate that contrasts in upper plate rheology leading to changes in density, magnetic susceptibility, and velocity of the upper plate serve to concentrate seismicity. The southwestern edge of the subducting Yakutat microplate has a strong influence on both upper and lower plate seismicity. Density and velocity contrasts also indicate changes in lower plate rheology that influence the location of deeper (>30 km) seismicity and the occurrence of a double seismic zone within the subducting Pacific plate.
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A Comprehensive Study of the Seismicity of the Kenai Peninsula–Cook Inlet Region, South-Central Alaska
Bulletin of the Seismological Society of America, 2009Co-Authors: Diane I. Doser, Annette M. VeilleuxAbstract:Abstract We compare 30 yr of background seismicity of the Kenai Peninsula–Cook Inlet Region (extending from eastern Prince William Sound–Kayak Island to west of the Cook Inlet volcanic arc) to potential field (gravity, magnetics), tomographic, Global Positioning System–geodesy, and geologic information to better determine factors controlling seismicity. We also compare the occurrence of M w >5 events over the past 80–100 yr to background seismicity in an effort to determine how reflective background seismicity is of the Regional seismic hazard. Our results indicate that contrasts in upper plate rheology leading to changes in density, magnetic susceptibility, and velocity of the upper plate serve to concentrate seismicity. The southwestern edge of the subducting Yakutat microplate has a strong influence on both upper and lower plate seismicity. Density and velocity contrasts also indicate changes in lower plate rheology that influence the location of deeper (>30 km) seismicity and the occurrence of a double seismic zone within the subducting Pacific plate.
Wen-liang Zeng - One of the best experts on this subject based on the ideXlab platform.
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Experimental Investigation on the Performances on the Shell Side of Shell-and-Tube Heat Exchangers with Multiparallel Channels
Industrial & Engineering Chemistry Research, 2011Co-Authors: Wen-liang Zeng, Zheng-guo ZhangAbstract:This paper presents an experimental investigation on the local surface heat-transfer coefficient on the shell side of a longitudinal-flow shell-and-tube heat exchanger with a multiparallel channel (MPC) Inlet and outlet. Under the conditions of with or without a fluid flow distributor (FDB) in the Inlet Region of the heat exchanger, some characteristics (such as the local Nussult number (Nu) distribution, local-mean Nu distribution, overall heat-transfer performance, and pressure drop) were investigated. The investigation results reveal the distribution of the local surface Nu value in the Inlet Region, and they give a reasonable mechanism analysis. It was suggested that not only the uniformity of both the fluid flow and the local Nu distribution was effectively improved by FDBs, but also that the global heat-transfer surface Nu value of the heat exchanger was enhanced by more than 10% with the pressure drop increasing slightly by FDBs.
Darrell S. Kaufman - One of the best experts on this subject based on the ideXlab platform.
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Stratigraphic and compositional complexities of the late Quaternary Lethe tephra in South-central Alaska
Quaternary International, 2008Co-Authors: James R. Riehle, Thomas A. Ager, R.d. Reger, D.s. Pinney, Darrell S. KaufmanAbstract:Abstract Recently discovered Lethe tephra has been proposed as a latest Pleistocene marker bed in Bristol Bay lowland NE to the Cook Inlet Region, Alaska, on the basis of correlations involving a single “Lethe average” glass composition. Type deposits in the Valley of Ten Thousand Smokes, however, are chemically heterogeneous—individual lapilli as well as aggregate ash deposits have glass compositions that range from the average mode to much higher SiO2 and K2O. Moreover, a lake-sediment core from the Cook Inlet Region contains one ash deposit similar to “Lethe average” and other, closely underlying deposits that resemble a mixture of the average mode and high-Si high-K mode of proximal deposits. Synthesis of previously published radiocarbon ages indicates a major eruption mainly of “Lethe average” mode about 13,000 14C yr BP. As many as six deposits in the Cook Inlet Region—five chiefly “Lethe average” mode—range from about 13,000 to 15–16,000 14C yr BP, and an early Holocene deposit in the Bristol Bay lowland extends the minimum age range of Lethe tephra throughout this Region to 8000 14C yr BP. Because of the appearance of “Lethe average” composition in multiple deposits spanning thousands of years, we urge caution when using a Lethe-like composition as a basis for inferring a latest Pleistocene age of a tephra deposit in south-central Alaska. Linear variation plots suggest that magma mixing caused the Lethe heterogeneity; multiple magmas were involved as well in other large pyroclastic eruptions such as Katmai (Alaska) and Rotorua (New Zealand). Lethe is an example of a heterogeneous tephra that may be better compared with other tephras by use of plots of individual analytical points rather than by calculating similarity coefficients based on edited data.