The Experts below are selected from a list of 282453 Experts worldwide ranked by ideXlab platform
Alan W Weimer - One of the best experts on this subject based on the ideXlab platform.
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rapid high temperature solar thermal biomass gasification in a prototype cavity reactor
Journal of Solar Energy Engineering-transactions of The Asme, 2010Co-Authors: Paul Lichty, Christopher Perkins, Bryan Woodruff, Carl Bingham, Alan W WeimerAbstract:High temperature biomass gasification has been performed in a prototype concentrated solar reactor. Gasification of biomass at high temperatures has many advantages compared with Historical Methods of producing fuels. Enhancements in overall conversion, product composition ratios, and tar reduction are achievable at temperatures greater than 1000°C. Furthermore, the utilization of concentrated solar energy to drive these reactions eliminates the need to consume a portion of the product stream for heating and some of the solar energy is stored as chemical energy in the product stream. Experiments to determine the effects of temperature, gas flow rate, and feed type were conducted at the high flux solar furnace at the National Renewable Energy Laboratory, Golden, CO. These experiments were conducted in a reflective cavity multitube prototype reactor. Biomass type was found to be the only significant factor within a 95% confidence interval. Biomass conversion as high as 68% was achieved on sun. Construction and design considerations of the prototype reactor are discussed as well as initial performance results.
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rapid high temperature solar thermal biomass gasification in a prototype cavity reactor
ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences, 2009Co-Authors: Paul Lichty, Christopher Perkins, Bryan Woodruff, Carl Bingham, Alan W WeimerAbstract:High temperature biomass gasification has been performed in a prototype concentrated solar reactor. Gasification of biomass at high temperatures has many advantages compared to Historical Methods of producing fuels. Enhancements in overall conversion, product composition ratios, and tar reduction are achievable at temperatures greater than 1000°C. Furthermore, the utilization of concentrated solar energy to drive these reactions eliminates the need to consume a portion of the product stream for heating and some of the solar energy is stored as chemical energy in the product stream. Experiments to determine the effects of temperature, gas flow rate, and feed type were conducted at the High Flux Solar Furnace (HFSF) at the National Renewable Energy Laboratory (NREL). These experiments were conducted in a reflective cavity multi-tube prototype reactor. Biomass type was found to be the only significant factor within a 95% confidence interval. Biomass conversion as high as 68% was achieved on sun. Construction and design considerations of the prototype reactor are discussed as well as initial performance results.Copyright © 2009 by ASME
David A Kirsch - One of the best experts on this subject based on the ideXlab platform.
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the origins of firm strategy learning by economic experimentation and strategic pivots in the early automobile industry
Strategic Management Journal, 2020Co-Authors: Sandeep Pillai, Brent Goldfarb, David A KirschAbstract:Research Summary We explore the effectiveness of economic experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of economic experiments, called strategic pivots, that requires irreversible firm commitments. Our quantitative analysis suggests that strategic pivoting was associated with success. We then use Historical Methods to understand whether this association is reasonably interpreted as a causal link. We identify lessons that could only plausibly have been learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. We discuss the generalizability of our findings to build the hypothesis that strategic pivots and economic experiments originate firm strategy. Managerial Summary We explore the effectiveness of experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of experiments, called strategic pivots, that requires irreversible firm commitments. Our analysis suggests that strategic pivoting was associated with success. We identify lessons that could only plausibly be learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. Even though firms may use lean techniques, market solutions may only be discovered through strategic pivots whose outcomes are unknowable ex‐ante. Therefore, successful strategies reflect an element of luck.
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the origins of firm strategy learning by economic experimentation and strategic pivots in the early automobile industry
Social Science Research Network, 2019Co-Authors: Sandeep Pillai, Brent Goldfarb, David A KirschAbstract:We explore the effectiveness of economic experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of economic experiments, called strategic pivots, that requires irreversible firm commitments. Our quantitative analysis suggests that strategic pivoting was associated with success. We then use Historical Methods to understand whether this association is reasonably interpreted as a causal link. We identify lessons that could only plausibly have been learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. We discuss the generalizability of our findings to build the hypothesis that strategic pivots and economic experiments originate firm strategy. We explore the effectiveness of experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of experiments, called strategic pivots, that requires irreversible firm commitments. Our analysis suggests that strategic pivoting was associated with success. We identify lessons that could only plausibly be learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. Even though firms may use lean techniques, market solutions may only be discovered through with strategic pivots whose outcomes are unknowable ex-ante. Therefore, successful strategies reflect an element of luck.
Paul Lichty - One of the best experts on this subject based on the ideXlab platform.
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rapid high temperature solar thermal biomass gasification in a prototype cavity reactor
Journal of Solar Energy Engineering-transactions of The Asme, 2010Co-Authors: Paul Lichty, Christopher Perkins, Bryan Woodruff, Carl Bingham, Alan W WeimerAbstract:High temperature biomass gasification has been performed in a prototype concentrated solar reactor. Gasification of biomass at high temperatures has many advantages compared with Historical Methods of producing fuels. Enhancements in overall conversion, product composition ratios, and tar reduction are achievable at temperatures greater than 1000°C. Furthermore, the utilization of concentrated solar energy to drive these reactions eliminates the need to consume a portion of the product stream for heating and some of the solar energy is stored as chemical energy in the product stream. Experiments to determine the effects of temperature, gas flow rate, and feed type were conducted at the high flux solar furnace at the National Renewable Energy Laboratory, Golden, CO. These experiments were conducted in a reflective cavity multitube prototype reactor. Biomass type was found to be the only significant factor within a 95% confidence interval. Biomass conversion as high as 68% was achieved on sun. Construction and design considerations of the prototype reactor are discussed as well as initial performance results.
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rapid high temperature solar thermal biomass gasification in a prototype cavity reactor
ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences, 2009Co-Authors: Paul Lichty, Christopher Perkins, Bryan Woodruff, Carl Bingham, Alan W WeimerAbstract:High temperature biomass gasification has been performed in a prototype concentrated solar reactor. Gasification of biomass at high temperatures has many advantages compared to Historical Methods of producing fuels. Enhancements in overall conversion, product composition ratios, and tar reduction are achievable at temperatures greater than 1000°C. Furthermore, the utilization of concentrated solar energy to drive these reactions eliminates the need to consume a portion of the product stream for heating and some of the solar energy is stored as chemical energy in the product stream. Experiments to determine the effects of temperature, gas flow rate, and feed type were conducted at the High Flux Solar Furnace (HFSF) at the National Renewable Energy Laboratory (NREL). These experiments were conducted in a reflective cavity multi-tube prototype reactor. Biomass type was found to be the only significant factor within a 95% confidence interval. Biomass conversion as high as 68% was achieved on sun. Construction and design considerations of the prototype reactor are discussed as well as initial performance results.Copyright © 2009 by ASME
Sandeep Pillai - One of the best experts on this subject based on the ideXlab platform.
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the origins of firm strategy learning by economic experimentation and strategic pivots in the early automobile industry
Strategic Management Journal, 2020Co-Authors: Sandeep Pillai, Brent Goldfarb, David A KirschAbstract:Research Summary We explore the effectiveness of economic experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of economic experiments, called strategic pivots, that requires irreversible firm commitments. Our quantitative analysis suggests that strategic pivoting was associated with success. We then use Historical Methods to understand whether this association is reasonably interpreted as a causal link. We identify lessons that could only plausibly have been learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. We discuss the generalizability of our findings to build the hypothesis that strategic pivots and economic experiments originate firm strategy. Managerial Summary We explore the effectiveness of experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of experiments, called strategic pivots, that requires irreversible firm commitments. Our analysis suggests that strategic pivoting was associated with success. We identify lessons that could only plausibly be learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. Even though firms may use lean techniques, market solutions may only be discovered through strategic pivots whose outcomes are unknowable ex‐ante. Therefore, successful strategies reflect an element of luck.
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the origins of firm strategy learning by economic experimentation and strategic pivots in the early automobile industry
Social Science Research Network, 2019Co-Authors: Sandeep Pillai, Brent Goldfarb, David A KirschAbstract:We explore the effectiveness of economic experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of economic experiments, called strategic pivots, that requires irreversible firm commitments. Our quantitative analysis suggests that strategic pivoting was associated with success. We then use Historical Methods to understand whether this association is reasonably interpreted as a causal link. We identify lessons that could only plausibly have been learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. We discuss the generalizability of our findings to build the hypothesis that strategic pivots and economic experiments originate firm strategy. We explore the effectiveness of experimentation as a learning mechanism through a Historical exploration of the early automobile industry. We focus on a particular subset of experiments, called strategic pivots, that requires irreversible firm commitments. Our analysis suggests that strategic pivoting was associated with success. We identify lessons that could only plausibly be learned through strategic pivoting and document that those firms that were able to learn from the strategic pivots were most likely to succeed. Even though firms may use lean techniques, market solutions may only be discovered through with strategic pivots whose outcomes are unknowable ex-ante. Therefore, successful strategies reflect an element of luck.
Mary Cialone - One of the best experts on this subject based on the ideXlab platform.
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a surge response function approach to coastal hazard assessment part 1 basic concepts
Natural Hazards, 2009Co-Authors: Donald T. Resio, Jennifer L Irish, Mary CialoneAbstract:This paper reviews Historical Methods for estimating surge hazards and concludes that the class of solutions produced with Joint Probability Method (JPM) solutions provides a much more stable estimate of hazard levels than alternative Methods. We proceed to describe changes in our understanding of the winds in hurricanes approaching a coast and the physics of surge generation that have required recent modifications to procedures utilized in earlier JPM studies. Of critical importance to the accuracy of hazard estimates is the ability to maintain a high level of fidelity in the numerical simulations while allowing for a sufficient number of simulations to populate the joint probability matrices for the surges. To accomplish this, it is important to maximize the information content in the sample storm set to be simulated. This paper introduces the fundamentals of a method based on the functional specification of the surge response for this purpose, along with an example of its application in the New Orleans area. A companion paper in this special issue (Irish et al. 2009) provides details of the portion of this new method related to interpolating/extrapolating along spatial dimensions.
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a surge response function approach to coastal hazard assessment part 1 basic concepts
Natural Hazards, 2009Co-Authors: Donald T. Resio, Jennifer L Irish, Mary CialoneAbstract:This paper reviews Historical Methods for estimating surge hazards and concludes that the class of solutions produced with Joint Probability Method (JPM) solutions provides a much more stable estimate of hazard levels than alternative Methods. We proceed to describe changes in our understanding of the winds in hurricanes approaching a coast and the physics of surge generation that have required recent modifications to procedures utilized in earlier JPM studies. Of critical importance to the accuracy of hazard estimates is the ability to maintain a high level of fidelity in the numerical simulations while allowing for a sufficient number of simulations to populate the joint probability matrices for the surges. To accomplish this, it is important to maximize the information content in the sample storm set to be simulated. This paper introduces the fundamentals of a method based on the functional specification of the surge response for this purpose, along with an example of its application in the New Orleans area. A companion paper in this special issue (Irish et al. 2009 ) provides details of the portion of this new method related to interpolating/extrapolating along spatial dimensions. Copyright Springer Science+Business Media B.V. 2009
