The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform
Carol R Purvis - One of the best experts on this subject based on the ideXlab platform.
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A Small Scale Biomass Fueled Gas Turbine Engine
Journal of Engineering for Gas Turbines and Power, 1999Co-Authors: Joe D Craig, Carol R PurvisAbstract:A new generation of small scale (less than 20 MWe) biomass fueled, power plants are being developed based on a gas turbine (Brayton cycle) prime mover. These power plants are expected to increase the efficiency and lower the cost of generating power from fuels such as wood. The new power plants are also expected to economically utilize annual plant Growth Materials (such as rice hulls, cotton gin trash, nut shells, and various straws, grasses, and animal manures) that are not normally considered as fuel for power plants. This paper summarizes the new power generation concept with emphasis on the engineering challenges presented by the gas turbine component.
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a small scale biomass fueled gas turbine engine
Volume 3: Coal Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, 1998Co-Authors: Joe D Craig, Carol R PurvisAbstract:A new generation of small scale (less than 20 MWe) biomass fueled, power plants are being developed based on a gas turbine (Brayton cycle) prime mover. These power plants are expected to increase the efficiency and lower the cost of generating power from fuels such as wood. The new power plants are also expected to economically utilize annual plant Growth Materials (such as rice hulls, cotton gin trash, nut shells, and various straws, grasses, and animal manures) that are not normally considered as fuel for power plants. This paper summarizes the new power generation concept with emphasis on the engineering challenges presented by the gas turbine component.Copyright © 1998 by ASME
Kenneth I Glassberg - One of the best experts on this subject based on the ideXlab platform.
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adolescent varicocelectomy is the potential for catch up Growth related to age and or tanner stage
The Journal of Urology, 2009Co-Authors: Joel G Decastro, Ahmad Shabsigh, Stephen A Poon, Laurent Laor, Kenneth I GlassbergAbstract:Purpose: Adolescent varicocelectomy is associated with a 70% incidence of postoperative catch-up Growth in boys with ipsilateral testicular hypotrophy. We determined whether preoperative patient age and Tanner stage were related to subsequent catch-up Growth. In other words if patients are followed with a period of observation, will a window of opportunity be lost for achieving catch-up Growth?Materials and Methods: We studied a total of 163 boys (mean age 15.1 years, range 10 to 24) with left or bilateral varicoceles who demonstrated 10% asymmetry or greater preoperatively, and had preoperative and postoperative testicular volume measurements available (using either ring orchidometer or ultrasound). Of these patients 59 also had preoperative Tanner stage recorded.Results: Of the patients with preoperative left hypotrophy 69% had achieved catch-up Growth at last followup (mean followup 28 months). When treated as a continuous variable, or when divided into general prepubertal vs postpubertal groupings, ag...
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Adolescent Varicocelectomy—Is the Potential for Catch-Up Growth Related to Age and/or Tanner Stage?
Journal of Urology, 2009Co-Authors: G. Joel Decastro, Ahmad Shabsigh, Stephen A Poon, Laurent Laor, Kenneth I GlassbergAbstract:Purpose: Adolescent varicocelectomy is associated with a 70% incidence of postoperative catch-up Growth in boys with ipsilateral testicular hypotrophy. We determined whether preoperative patient age and Tanner stage were related to subsequent catch-up Growth. In other words if patients are followed with a period of observation, will a window of opportunity be lost for achieving catch-up Growth?Materials and Methods: We studied a total of 163 boys (mean age 15.1 years, range 10 to 24) with left or bilateral varicoceles who demonstrated 10% asymmetry or greater preoperatively, and had preoperative and postoperative testicular volume measurements available (using either ring orchidometer or ultrasound). Of these patients 59 also had preoperative Tanner stage recorded.Results: Of the patients with preoperative left hypotrophy 69% had achieved catch-up Growth at last followup (mean followup 28 months). When treated as a continuous variable, or when divided into general prepubertal vs postpubertal groupings, ag...
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Adolescent Varicocelectomy : Is the Potential for Catch-Up Growth Related to Age and/or Tanner Stage? Commentary
The Journal of Urology, 2009Co-Authors: G. Joel Decastro, Ahmad Shabsigh, Stephen A Poon, Laurent Laor, Kenneth I Glassberg, David A. Diamond, Thomas F. KolonAbstract:Purpose: Adolescent varicocelectomy is associated with a 70% incidence of postoperative catch-up Growth in boys with ipsilateral testicular hypotrophy. We determined whether preoperative patient age and Tanner stage were related to subsequent catch-up Growth. In other words if patients are followed with a period of observation, will a window of opportunity be lost for achieving catch-up Growth? Materials and Methods: We studied a total of 163 boys (mean age 15.1 years, range 10 to 24) with left or bilateral varicoceles who demonstrated 10% asymmetry or greater preoperatively, and had preoperative and postoperative testicular volume measurements available (using either ring orchidometer or ultrasound). Of these patients 59 also had preoperative Tanner stage recorded. Results: Of the patients with preoperative left hypotrophy 69% had achieved catch-up Growth at last followup (mean followup 28 months). When treated as a continuous variable, or when divided into general prepubertal vs postpubertal groupings, age at surgery was not significantly associated with catch-up Growth. Similarly, there was no significant difference in catch-up Growth associated with grade of varicocele, duration of postoperative followup or presence of unilateral left vs bilateral varicocele. No association with Tanner stage was found, although the patient numbers were too small to draw any statistically significant conclusions. Conclusions: The prevalence of testicular catch-up Growth after varicocelectomy is high, even for patients in their early 20s. Among males 10 to 24 years old there is no specific age or Tanner stage that offers the best opportunity for catch-up Growth.
Joe D Craig - One of the best experts on this subject based on the ideXlab platform.
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A Small Scale Biomass Fueled Gas Turbine Engine
Journal of Engineering for Gas Turbines and Power, 1999Co-Authors: Joe D Craig, Carol R PurvisAbstract:A new generation of small scale (less than 20 MWe) biomass fueled, power plants are being developed based on a gas turbine (Brayton cycle) prime mover. These power plants are expected to increase the efficiency and lower the cost of generating power from fuels such as wood. The new power plants are also expected to economically utilize annual plant Growth Materials (such as rice hulls, cotton gin trash, nut shells, and various straws, grasses, and animal manures) that are not normally considered as fuel for power plants. This paper summarizes the new power generation concept with emphasis on the engineering challenges presented by the gas turbine component.
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a small scale biomass fueled gas turbine engine
Volume 3: Coal Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, 1998Co-Authors: Joe D Craig, Carol R PurvisAbstract:A new generation of small scale (less than 20 MWe) biomass fueled, power plants are being developed based on a gas turbine (Brayton cycle) prime mover. These power plants are expected to increase the efficiency and lower the cost of generating power from fuels such as wood. The new power plants are also expected to economically utilize annual plant Growth Materials (such as rice hulls, cotton gin trash, nut shells, and various straws, grasses, and animal manures) that are not normally considered as fuel for power plants. This paper summarizes the new power generation concept with emphasis on the engineering challenges presented by the gas turbine component.Copyright © 1998 by ASME
Stephen M Davis - One of the best experts on this subject based on the ideXlab platform.
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quantitative ct densitometry for predicting intracerebral hemorrhage Growth
American Journal of Neuroradiology, 2013Co-Authors: Christen D Barras, Brian M Tress, Soren Christensen, Marnie Collins, Patricia Desmond, B E Skolnick, Stephan A Mayer, Stephen M DavisAbstract:BACKGROUND AND PURPOSE: Intracerebral hemorrhage Growth independently predicts disability and death. We hypothesized that noncontrast quantitative CT densitometry reflects active bleeding and improves predictive models of Growth. Materials AND METHODS: We analyzed 81 of the 96 available baseline CT scans obtained <3 hours post-ICH from the placebo arm of the phase IIb trial of recombinant factor VIIa. Fifteen scans could not be analyzed for technical reasons, but baseline characteristics were not statistically significantly different. Hounsfield unit histograms for each ICH were generated. Analyzed qCTD parameters included the following: mean, SD, coefficient of variation, skewness (distribution asymmetry), and kurtosis (“peakedness” versus “flatness”). These densitometry parameters were examined in statistical models accounting for baseline volume and time-to-scan. RESULTS: The coefficient of variation of the ICH attenuation was the most significant individual predictor of hematoma Growth (adjusted R 2 = 0.107, P = .002), superior to BV (adjusted R 2 = 0.08, P = .006) or TTS (adjusted R 2 = 0.03, P = .05). The most significant combined model incorporated coefficient of variation, BV, and TTS (adjusted R 2 = 0.202, P = .009 for coefficient of variation) compared with BV and TTS alone (adjusted R 2 = 0.115, P < .05). qCTD increased the number of Growth predictions within ±1 mL of actual 24-hour Growth by up to 47%. CONCLUSIONS: Heterogeneous ICH attenuation on hyperacute (<3 hours) CT imaging is predictive of subsequent hematoma expansion and may reflect an active bleeding process. Further studies are required to determine whether qCTD can be incorporated into standard imaging protocols for predicting ICH Growth. BV : baseline ICH volume ICH : intracerebral hemorrhage qCTD : quantitative CT densitometry rFVIIa : recombinant activated factor VII TTS : time-to-scan (from ictus)
Laurent Laor - One of the best experts on this subject based on the ideXlab platform.
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adolescent varicocelectomy is the potential for catch up Growth related to age and or tanner stage
The Journal of Urology, 2009Co-Authors: Joel G Decastro, Ahmad Shabsigh, Stephen A Poon, Laurent Laor, Kenneth I GlassbergAbstract:Purpose: Adolescent varicocelectomy is associated with a 70% incidence of postoperative catch-up Growth in boys with ipsilateral testicular hypotrophy. We determined whether preoperative patient age and Tanner stage were related to subsequent catch-up Growth. In other words if patients are followed with a period of observation, will a window of opportunity be lost for achieving catch-up Growth?Materials and Methods: We studied a total of 163 boys (mean age 15.1 years, range 10 to 24) with left or bilateral varicoceles who demonstrated 10% asymmetry or greater preoperatively, and had preoperative and postoperative testicular volume measurements available (using either ring orchidometer or ultrasound). Of these patients 59 also had preoperative Tanner stage recorded.Results: Of the patients with preoperative left hypotrophy 69% had achieved catch-up Growth at last followup (mean followup 28 months). When treated as a continuous variable, or when divided into general prepubertal vs postpubertal groupings, ag...
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Adolescent Varicocelectomy—Is the Potential for Catch-Up Growth Related to Age and/or Tanner Stage?
Journal of Urology, 2009Co-Authors: G. Joel Decastro, Ahmad Shabsigh, Stephen A Poon, Laurent Laor, Kenneth I GlassbergAbstract:Purpose: Adolescent varicocelectomy is associated with a 70% incidence of postoperative catch-up Growth in boys with ipsilateral testicular hypotrophy. We determined whether preoperative patient age and Tanner stage were related to subsequent catch-up Growth. In other words if patients are followed with a period of observation, will a window of opportunity be lost for achieving catch-up Growth?Materials and Methods: We studied a total of 163 boys (mean age 15.1 years, range 10 to 24) with left or bilateral varicoceles who demonstrated 10% asymmetry or greater preoperatively, and had preoperative and postoperative testicular volume measurements available (using either ring orchidometer or ultrasound). Of these patients 59 also had preoperative Tanner stage recorded.Results: Of the patients with preoperative left hypotrophy 69% had achieved catch-up Growth at last followup (mean followup 28 months). When treated as a continuous variable, or when divided into general prepubertal vs postpubertal groupings, ag...
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Adolescent Varicocelectomy : Is the Potential for Catch-Up Growth Related to Age and/or Tanner Stage? Commentary
The Journal of Urology, 2009Co-Authors: G. Joel Decastro, Ahmad Shabsigh, Stephen A Poon, Laurent Laor, Kenneth I Glassberg, David A. Diamond, Thomas F. KolonAbstract:Purpose: Adolescent varicocelectomy is associated with a 70% incidence of postoperative catch-up Growth in boys with ipsilateral testicular hypotrophy. We determined whether preoperative patient age and Tanner stage were related to subsequent catch-up Growth. In other words if patients are followed with a period of observation, will a window of opportunity be lost for achieving catch-up Growth? Materials and Methods: We studied a total of 163 boys (mean age 15.1 years, range 10 to 24) with left or bilateral varicoceles who demonstrated 10% asymmetry or greater preoperatively, and had preoperative and postoperative testicular volume measurements available (using either ring orchidometer or ultrasound). Of these patients 59 also had preoperative Tanner stage recorded. Results: Of the patients with preoperative left hypotrophy 69% had achieved catch-up Growth at last followup (mean followup 28 months). When treated as a continuous variable, or when divided into general prepubertal vs postpubertal groupings, age at surgery was not significantly associated with catch-up Growth. Similarly, there was no significant difference in catch-up Growth associated with grade of varicocele, duration of postoperative followup or presence of unilateral left vs bilateral varicocele. No association with Tanner stage was found, although the patient numbers were too small to draw any statistically significant conclusions. Conclusions: The prevalence of testicular catch-up Growth after varicocelectomy is high, even for patients in their early 20s. Among males 10 to 24 years old there is no specific age or Tanner stage that offers the best opportunity for catch-up Growth.
