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Articles 1561 - 1590 of 7616
Full-Text Articles in Physical Sciences and Mathematics
Overview Of Dri’S Renewable Energy Activities, Kent Hoekman
Overview Of Dri’S Renewable Energy Activities, Kent Hoekman
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
Nshe's Nevada Renewable Energy Consortium, Steve Wells
Nshe's Nevada Renewable Energy Consortium, Steve Wells
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance
Development Of Biocompatible Polymer Monoliths For The Analysis Of Proteins And Peptides, Yun Li
Development Of Biocompatible Polymer Monoliths For The Analysis Of Proteins And Peptides, Yun Li
Theses and Dissertations
Biocompatibility is an important issue for the development of chromatographic stationary phases for the analysis of biomolecules (including proteins and peptides). A biocompatible stationary phase material is a material that resists nonspecific adsorption of biomolecules and does not interact with them in a way that would alter or destroy their structures or biochemical functions. The monolithic column format is a good alternative to typical spherical particle packed columns for capillary liquid chromatography of biomacromolecules. Several novel anion-exchange polymer monoliths for the analysis of proteins were synthesized for improved biocompatibility. Two novel polymeric monoliths were prepared in a single step by …
Current Projects At The Unlv Center For Energy Research, Robert F. Boehm
Current Projects At The Unlv Center For Energy Research, Robert F. Boehm
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
Education And Energy Innovation: Nshe’S Central Role In Transforming Nevada’S Economy, James Croce
Education And Energy Innovation: Nshe’S Central Role In Transforming Nevada’S Economy, James Croce
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
Over A Barrel: A Worldwide Energy Crisis…, Alfred S. Schlachter
Over A Barrel: A Worldwide Energy Crisis…, Alfred S. Schlachter
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
Nevada’S Changing Renewable Energy Landscape, Kathleen Drakulich
Nevada’S Changing Renewable Energy Landscape, Kathleen Drakulich
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
The Way Forward: A Vision For Nevada’S Energy Future, Thomas Fair
The Way Forward: A Vision For Nevada’S Energy Future, Thomas Fair
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
2009 Symposium Schedule And Sponsors, University Of Nevada Las Vegas
2009 Symposium Schedule And Sponsors, University Of Nevada Las Vegas
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
2009 Symposium Schedule, University Of Nevada Las Vegas
2009 Symposium Schedule, University Of Nevada Las Vegas
UNLV Renewable Energy Symposium
The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.
Biofuels: Cultivating Energy, Not Invasive Species, Invasive Species Advisory Committee
Biofuels: Cultivating Energy, Not Invasive Species, Invasive Species Advisory Committee
National Invasive Species Council
Biofuels: Cultivating Energy, not Invasive Species, approved by ISAC on August 11, 2009
ISSUE
To provide alternatives to petroleum-based energy, the United States government has mandated a greater proportion of plant-based biofuels be integrated into its energy portfolio. However, certain plant species being proposed for biofuel production in the United States are invasive species or are likely to escape cultivation and become invasive. United States Executive Order (EO) 131121 defines invasive species as “alien [non-native] species whose introduction does or is likely to cause economic or environmental harm or harm to human health” and states: “Each Federal agency whose actions …
Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, R. S. Amin, S. B. Anderson, W. G. Anderson, Rodica Martin
Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, R. S. Amin, S. B. Anderson, W. G. Anderson, Rodica Martin
Department of Physics and Astronomy Faculty Scholarship and Creative Works
This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the fifth LIGO science run (S5). The data were searched for quasimonochromatic waves with frequencies f in the range from 50 to 1500 Hz, with a linear frequency drift ḟ (measured at the solar system barycenter) in the range -f/τ<ḟ<0.1f/τ, for a minimum spin-down age τ of 1000 years for signals below 400 Hz and 8000 years above 400 Hz. The main computational work of the search was distributed over approximately 100000 computers volunteered by the general public. This large computing power allowed the use of a relatively long coherent integration time of 30 hours while searching a large parameter space. This search extends Einstein@Home's previous search in LIGO S4 data to about 3 times better sensitivity. No statistically significant signals were found. In the 125-225 Hz band, more than 90% of sources with dimensionless gravitational-wave strain tensor amplitude greater than 3×10-24 would have been detected.
Solving The P-Median Problem With Insights From Discrete Vector Quantization, Gino J. Lim, Allen Holder, Josh Reese
Solving The P-Median Problem With Insights From Discrete Vector Quantization, Gino J. Lim, Allen Holder, Josh Reese
Mathematical Sciences Technical Reports (MSTR)
The goals of this paper are twofold. First, we formally equate the p-median problem from facility location to the optimal design of a vector quantizer. Second, we use the equivalence to show that the Maranzana Algorithm can be interpreted as a projected Lloyd Algorithm, a fact that improves complexity. Numerical results verify significant improvements in run-time.
Energy Dissipation And Ion Heating At The Heliospheric Termination Shock, P. Wu, D. Winske, S. P. Gary, Nathan A. Schwadron, Martin A. Lee
Energy Dissipation And Ion Heating At The Heliospheric Termination Shock, P. Wu, D. Winske, S. P. Gary, Nathan A. Schwadron, Martin A. Lee
Physics & Astronomy
The Los Alamos hybrid simulation code is used to examine heating and the partition of dissipation energy at the perpendicular heliospheric termination shock in the presence of pickup ions. The simulations are one-dimensional in space but three-dimensional in field and velocity components, and are carried out for a range of values of pickup ion relative density. Results from the simulations show that because the solar wind ions are relatively cold upstream, the temperature of these ions is raised by a relatively larger factor than the temperature of the pickup ions. An analytic model for energy partition is developed on the …
Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, R. S. Amin, S. B. Anderson, W. G. Anderson, M. A. Arain, M. Araya, H. Armandula, P. Armor, Y. Aso, S. Aston, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, S. Ballmer, C. Barker, D. Barker, B. Barr, P. Barriga, L. Barsotti, M. A. Barton, I. Bartos, R. Bassiri, M. Bastarrika, B. Behnke, M. Benacquista, Tiffany Z. Summerscales
Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, R. S. Amin, S. B. Anderson, W. G. Anderson, M. A. Arain, M. Araya, H. Armandula, P. Armor, Y. Aso, S. Aston, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, S. Ballmer, C. Barker, D. Barker, B. Barr, P. Barriga, L. Barsotti, M. A. Barton, I. Bartos, R. Bassiri, M. Bastarrika, B. Behnke, M. Benacquista, Tiffany Z. Summerscales
Faculty Publications
This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the fifth LIGO science run (S5). The data were searched for quasimonochromatic waves with frequencies f in the range from 50 to 1500 Hz, with a linear frequency drift ḟ (measured at the solar system barycenter) in the range -f/τ<ḟ<0.1f/τ, for a minimum spin-down age τ of 1000 years for signals below 400 Hz and 8000 years above 400 Hz. The main computational work of the search was distributed over approximately 100000 computers volunteered by the general public. This large computing power allowed the use of a relatively long coherent integration time of 30 hours while searching a large parameter space. This search extends Einstein@Home's previous search in LIGO S4 data to about 3 times better sensitivity. No statistically significant signals were found. In the 125-225 Hz band, more than 90% of sources with dimensionless gravitational-wave strain tensor amplitude greater than 3×10-24 would have been detected. © 2009 The American Physical Society.
A Pragmatic Evaluation Of An Academic Practicum's Knowledge Transfer Process, Luis F. Pacheco
A Pragmatic Evaluation Of An Academic Practicum's Knowledge Transfer Process, Luis F. Pacheco
Regis University Student Publications (comprehensive collection)
Practicums are designed to provide on-the-job learning experience for the students in their chosen occupational field. But do students actually benefit from practicums? This manuscript investigates linkages between knowledge repository systems and knowledge transfer in database technology practicums. It examines the literature on knowledge transfer, develops an Action Research methodology, and presents results of a new study in database academic practicums. The study focuses on a graduate school database technology practicum at Denver-based Regis University. As a member of an academic practicum team with responsibilities involving database administrative support to a group of students and faculty, the researcher seeks to …
Real-Time Virus Analysis Via Image Charge Detection Surface Induced Dissociation Tandem Mass Spectrometry, Seth T. Call
Real-Time Virus Analysis Via Image Charge Detection Surface Induced Dissociation Tandem Mass Spectrometry, Seth T. Call
Theses and Dissertations
This thesis reports on the development of a novel mass spectrometer combining image charge detection with surface induced dissociation for real-time analysis of intact viruses. Protonated viruses produced using electrospray are accelerated and subsequently impact on a solid surface. Capsid peptides released during the impact are analyzed using time-of-flight mass spectrometry. Image charge detection is used to measure the mass and charge states of structurally intact, electrosprayed viruses prior to impact. Since virus capsids are composed of loosely-bound proteins, collision of viruses with surfaces at moderate impact energies could release intact proteins. The masses and numbers of different protein types …
Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, R. S. Amin, S. B. Anderson, W. G. Anderson, M. A. Arain, M. Araya, H. Armandula, P. Armor, Y. Aso, S. Aston, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, S. Ballmer, C. Barker, D. Barker, B. Barr, P. Barriga, L. Barsotti, M. A. Barton, I. Bartos, R. Bassiri, M. Bastarrika, B. Behnke
Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, R. S. Amin, S. B. Anderson, W. G. Anderson, M. A. Arain, M. Araya, H. Armandula, P. Armor, Y. Aso, S. Aston, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, S. Ballmer, C. Barker, D. Barker, B. Barr, P. Barriga, L. Barsotti, M. A. Barton, I. Bartos, R. Bassiri, M. Bastarrika, B. Behnke
Physics and Astronomy Faculty Publications and Presentations
This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the fifth LIGO science run (S5). The data were searched for quasimonochromatic waves with frequencies f in the range from 50 to 1500 Hz, with a linear frequency drift ḟ (measured at the solar system barycenter) in the range -f/τ<ḟ<0.1f/τ, for a minimum spin-down age τ of 1000 years for signals below 400 Hz and 8000 years above 400 Hz. The main computational work of the search was distributed over approximately 100000 computers volunteered by the general public. This large computing power allowed the use of a relatively long coherent integration time of 30 hours while searching a large parameter space. This search extends Einstein@Home's previous search in LIGO S4 data to about 3 times better sensitivity. No statistically significant signals were found. In the 125-225 Hz band, more than 90% of sources with dimensionless gravitational-wave strain tensor amplitude greater than 3×10-24 would have been detected. © 2009 The American Physical Society.
Clean-Energy Policy Community Town Hall: Part A, Al Gore, Harry Reid, T. Boone Pickens, Cathy Zoi
Clean-Energy Policy Community Town Hall: Part A, Al Gore, Harry Reid, T. Boone Pickens, Cathy Zoi
National Clean Energy Summit
Moderator: John D. Podesta, President & CEO, Center for American Progress Action Fund
Special Remarks By President Bill Clinton, Bill Clinton
Special Remarks By President Bill Clinton, Bill Clinton
National Clean Energy Summit
Special remarks by President Bill Clinton
Roundtable: Building The Clean-Energy Economy: Part B, Neal Smatresk, Harry Reid, Al Gore, John D. Podesta
Roundtable: Building The Clean-Energy Economy: Part B, Neal Smatresk, Harry Reid, Al Gore, John D. Podesta
National Clean Energy Summit
Moderator: Tim Wirth, Former Colorado Senator, United Nations Foundation
2009 National Clean Energy Summit Event Video Highlights And Press Tour Photos
2009 National Clean Energy Summit Event Video Highlights And Press Tour Photos
National Clean Energy Summit
Video highlights & press tour photos
Rotationally Warm Molecular Hydrogen In The Orion Bar, Gargi Shaw, Gary J. Ferland, W. J. Henney, P. C. Stancil, N. P. Abel, E. W. Pellegrini, J. A. Baldwin, P. A. Van Hoof
Rotationally Warm Molecular Hydrogen In The Orion Bar, Gargi Shaw, Gary J. Ferland, W. J. Henney, P. C. Stancil, N. P. Abel, E. W. Pellegrini, J. A. Baldwin, P. A. Van Hoof
Physics and Astronomy Faculty Publications
The Orion Bar is one of the nearest and best-studied photodissociation or photon-dominated regions (PDRs). Observations reveal the presence of H2 lines from vibrationally or rotationally excited upper levels that suggest warm gas temperatures (400-700 K). However, standard models of PDRs are unable to reproduce such warm rotational temperatures. In this paper, we attempt to explain these observations with new comprehensive models which extend from the H+ region through the Bar and include the magnetic field in the equation of state. We adopt the model parameters from our previous paper which successfully reproduced a wide variety of spectral …
Mesoporosity And Functional Group Dependent Endocytosis And Cytotoxicity Of Silica Nanomaterials, Zhimin Tao, Bonnie B. Toms, Jerry Goodisman, Tewodros Asefa
Mesoporosity And Functional Group Dependent Endocytosis And Cytotoxicity Of Silica Nanomaterials, Zhimin Tao, Bonnie B. Toms, Jerry Goodisman, Tewodros Asefa
Chemistry - All Scholarship
We report different mesoporosity-dependent and functional group-dependent cytotoxicity and endocytosis of various silica nanomaterials on suspended and adherent cells. This dependency further varied with incubation time and particle dosage, and appeared to be associated with the particles' endocytotic efficiency and their chemical and physical properties. We studied two common mesoporous nanomaterials (MSNs), MCM-41 and SBA-15, and one type of solid-cored silica microsphere, paralleled by their quaternary amine functionalized counterparts. Compared to SBA-15, MCM-41 has a larger surface area but smaller pore size, whereas SMS exhibits low surface area and poor porosity. In Jurkat cells, SBA-15 and MCM-41 exhibited different cytotoxicity …
Mesoporosity And Functional Group Dependent Endocytosis And Cytotoxicity Of Silica Nanomaterials, Zhimin Tao, Jerry Goodisman, Tewodros Asefa, Bonnie B. Toms
Mesoporosity And Functional Group Dependent Endocytosis And Cytotoxicity Of Silica Nanomaterials, Zhimin Tao, Jerry Goodisman, Tewodros Asefa, Bonnie B. Toms
Chemistry - All Scholarship
We report different mesoporosity-dependent and functional group-dependent cytotoxicity and endocytosis of various silica nanomaterials on suspended and adherent cells. This dependency further varied with incubation time and particle dosage, and appeared to be associated with the particles’ endocytotic efficiency and their chemical and physical properties. We studied two common mesoporous nanomaterials (MSNs), MCM-41 and SBA-15, and one type of solid-cored silica microsphere, paralleled by their quaternary amine functionalized counterparts. Compared to SBA-15, MCM-41 has a larger surface area but smaller pore size, whereas SMS exhibits low surface area and poor porosity. In Jurkat cells, SBA-15 and MCM- 41 exhibited different …
Non-Pinhole Imposters, Voicu Popescu, Kyle Hayward, Paul Rosen, Chris Wyman
Non-Pinhole Imposters, Voicu Popescu, Kyle Hayward, Paul Rosen, Chris Wyman
Department of Computer Science Technical Reports
No abstract provided.
Shrinkage Estimation Of Expression Fold Change As An Alternative To Testing Hypotheses Of Equivalent Expression, Zahra Montazeri, Corey M. Yanofsky, David R. Bickel
Shrinkage Estimation Of Expression Fold Change As An Alternative To Testing Hypotheses Of Equivalent Expression, Zahra Montazeri, Corey M. Yanofsky, David R. Bickel
COBRA Preprint Series
Research on analyzing microarray data has focused on the problem of identifying differentially expressed genes to the neglect of the problem of how to integrate evidence that a gene is differentially expressed with information on the extent of its differential expression. Consequently, researchers currently prioritize genes for further study either on the basis of volcano plots or, more commonly, according to simple estimates of the fold change after filtering the genes with an arbitrary statistical significance threshold. While the subjective and informal nature of the former practice precludes quantification of its reliability, the latter practice is equivalent to using a …
Supporting Remote Manipulation: An Ecological Approach, John A. Atherton
Supporting Remote Manipulation: An Ecological Approach, John A. Atherton
Theses and Dissertations
User interfaces for remote robotic manipulation widely lack sufficient support for situation awareness and, consequently, can induce high mental workload. With poor situation awareness, operators may fail to notice task-relevant features in the environment often leading the robot to collide with the environment. With high workload, operators may not perform well over long periods of time and may feel stressed. We present an ecological visualization that improves operator situation awareness. Our user study shows that operators using the ecological interface collided with the environment on average half as many times compared with a typical interface, even with a poorly calibrated …
Design And Characterization Of A Human Exposure Chamber And Inversion Episodes In Salt Lake City, Utah In January/February Of 2009, Roman Yuri Kuprov
Design And Characterization Of A Human Exposure Chamber And Inversion Episodes In Salt Lake City, Utah In January/February Of 2009, Roman Yuri Kuprov
Theses and Dissertations
Research on health effects of particulate matter (PM) has been a very active area in the last two decades. One plausible mechanism by which exposure to PM affects human health includes modification of autonomic endothelium function. Decreased endothelium activity causes heightened risks of cardiovascular disease. A human exposure chamber designed to conduct experiments to quantify diminished function of endothelium from short term exposure to PM is described. The chamber consists of two stages for containment and pre-treatment of PM and exposure of human subjects. Concentrations of CO, CO2, NO, NO2, O3, and PM2.5, are monitored and controlled in the exposure …
Analogue Hawking Radiation In A Dc-Squid Array Transmission Line, P D. Nation, M. P. Blencowe, A. J. Rimberg, E. Buks
Analogue Hawking Radiation In A Dc-Squid Array Transmission Line, P D. Nation, M. P. Blencowe, A. J. Rimberg, E. Buks
Dartmouth Scholarship
We propose the use of a superconducting transmission line formed from an array of dc-SQUID’s for investigating analogue Hawking radiation. Biasing the array with a space-time varying flux modifies the propagation velocity of the transmission line, leading to an effective metric with an horizon. Being a fundamentally quantum mechanical device, this setup allows for investigations of quantum effects such as back-reaction and analogue space-time fluctuations on the Hawking process.