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Articles 181 - 210 of 7616
Full-Text Articles in Physical Sciences and Mathematics
Remarks On The Stability Of Some Size-Structured Population Models V: The Case When The Death Rate Depends On Adults Only And The Growth Rate Depends On Size Only, M. El-Doma
Applications and Applied Mathematics: An International Journal (AAM)
We continue our study of size-structured population dynamics models when the population is divided into adults and juveniles, started in El-Doma (To appear). We concentrate our efforts in the special case when the death rate depends on adults only, the growth rate depends on size only and the maximum size for an individual in the population is infinite. Three demographic parameters are identified and are shown to determine conditions for the (in)stability of a nontrivial steady state. We also give examples that illustrate the stability results. The results in this paper generalize previous results, for example, see Calsina, et al. …
Sample Properties Of Random Fields. Ii. Continuity, Jürgen Potthoff
Sample Properties Of Random Fields. Ii. Continuity, Jürgen Potthoff
Communications on Stochastic Analysis
No abstract provided.
On The Extension Of A Basic Property Of Conditional Expectations To Second Quantization Operators, Alberto Lanconelli
On The Extension Of A Basic Property Of Conditional Expectations To Second Quantization Operators, Alberto Lanconelli
Communications on Stochastic Analysis
No abstract provided.
Irreducible And Periodic Positive Maps, Franco Fagnola, Rely Pellicer
Irreducible And Periodic Positive Maps, Franco Fagnola, Rely Pellicer
Communications on Stochastic Analysis
No abstract provided.
Converse Comparison Theorems For Backward Doubly Stochastic Differential Equations, Mohamed El Otmani, Naoual Mrhardy
Converse Comparison Theorems For Backward Doubly Stochastic Differential Equations, Mohamed El Otmani, Naoual Mrhardy
Communications on Stochastic Analysis
No abstract provided.
Nonlinear Filtering Of Itô-Lévy Stochastic Differential Equations With Continuous Observations, S Popa, S S Sritharan
Nonlinear Filtering Of Itô-Lévy Stochastic Differential Equations With Continuous Observations, S Popa, S S Sritharan
Communications on Stochastic Analysis
No abstract provided.
Stochastic Integral Characterizations Of Semi-Selfdecomposable Distributions And Related Ornstein-Uhlenbeck Type Processes, Makoto Maejima, Yohei Ueda
Stochastic Integral Characterizations Of Semi-Selfdecomposable Distributions And Related Ornstein-Uhlenbeck Type Processes, Makoto Maejima, Yohei Ueda
Communications on Stochastic Analysis
No abstract provided.
Mrm-Applicable Orthogonal Polynomials For Certain Hypergeometric Functions, Izumi Kubo, Hui-Hsiung Kuo
Mrm-Applicable Orthogonal Polynomials For Certain Hypergeometric Functions, Izumi Kubo, Hui-Hsiung Kuo
Communications on Stochastic Analysis
No abstract provided.
Invariant States For The Asymmetric Exclusion Quantum Markov Semigroup, Julio C Garcia, Leopoldo Pantaleón-Martinez, Roberto Quezada
Invariant States For The Asymmetric Exclusion Quantum Markov Semigroup, Julio C Garcia, Leopoldo Pantaleón-Martinez, Roberto Quezada
Communications on Stochastic Analysis
No abstract provided.
Exact Scenario Simulation For Selected Multi-Dimensional Stochastic Processes, Eckhard Platen, Renata Rendek
Exact Scenario Simulation For Selected Multi-Dimensional Stochastic Processes, Eckhard Platen, Renata Rendek
Communications on Stochastic Analysis
No abstract provided.
Spatial Distribution Of Petroleum Hydrocarbons In Sediment Cores From Blind Pass, St. Pete Beach, Florida, Charles M. Featherstone, John Proni, Thomas P. Carsey, Cheryl J. Brown, Madeleine M. Adler, Patricia Blackwelder, Husain Alsayegh, Teresa A. Hood, Christina Piela, Donald S. Mccorquodale Jr.
Spatial Distribution Of Petroleum Hydrocarbons In Sediment Cores From Blind Pass, St. Pete Beach, Florida, Charles M. Featherstone, John Proni, Thomas P. Carsey, Cheryl J. Brown, Madeleine M. Adler, Patricia Blackwelder, Husain Alsayegh, Teresa A. Hood, Christina Piela, Donald S. Mccorquodale Jr.
Marine & Environmental Sciences Faculty Reports
One hundred and one sediment cores were collected to characterize the spatial distribution of petroleum hydrocarbons within and just outside Blind Pass, St. Pete Beach, Florida. Twenty-five percent of the cores exhibited levels of petroleum hydrocarbons above detection limits of the gas chromatograph/flame ionization detector (GC/FID) (0.01 mg/Kg), but at generally low concentrations. Petroleum hydrocarbon speciation studies of these samples (gas chromatography/mass spectroscopy [GC/MS]) indicate above-detection level (1 μg/Kg) petroleum hydrocarbons are similar to the non-volatile petroleum hydrocarbons found in a Bouchard 155 reference sample collected after the 1993 oil spill in the area, but are in a much degraded …
Sfa Weather Station-December 2009, Arthur Temple College Of Forestry And Agriculture, Stephen F. Austin State University
Sfa Weather Station-December 2009, Arthur Temple College Of Forestry And Agriculture, Stephen F. Austin State University
Weather Station Data
No abstract provided.
Carbon Finance Ii: Investing In Forests For Climate Protection, Jamie Carlson, Bryan Garcia, Claire Jahns, Eric Roberts, Katie Schindall
Carbon Finance Ii: Investing In Forests For Climate Protection, Jamie Carlson, Bryan Garcia, Claire Jahns, Eric Roberts, Katie Schindall
Yale School of the Environment Publications Series
Carbon Finance II: Investing in Forests for Climate Protection is a collection of lectures given during the 2008-2009 Carbon Finance Speaker Series at the Yale School of Forestry & Environmental Studies. The annual series is hosted by the Center for Business and the Environment at Yale and supported by the Emily Hall Tremaine Foundation and the Henry P. Kendall Foundation. The 2008-2009 speaker series focused on forest carbon and the opportunities and obstacles to including forests in greenhouse gas emission reduction policies, carbon markets, and cap-and-trade systems.
On Neutral Absorption And Spectral Evolution In X-Ray Binaries, J. M. Miller, E. M. Cackett, R. C. Reis
On Neutral Absorption And Spectral Evolution In X-Ray Binaries, J. M. Miller, E. M. Cackett, R. C. Reis
Physics and Astronomy Faculty Research Publications
Current X-ray observatories make it possible to follow the evolution of transient and variable X-ray binaries across a broad range in luminosity and source behavior. In such studies, it can be unclear whether evolution in the low-energy portion of the spectrum should be attributed to evolution in the source, or instead to evolution in neutral photoelectric absorption. Dispersive spectrometers make it possible to address this problem. We have analyzed a small but diverse set of X-ray binaries observed with the Chandra High Energy Transmission Grating Spectrometer across a range in luminosity and different spectral states. The column density in individual …
Well-Posedness Of Minimal Time Problem With Constant Dynamics In Banach Spaces, Giovanni Colombo, Vladimir V. Goncharov, Boris S. Mordukhovich
Well-Posedness Of Minimal Time Problem With Constant Dynamics In Banach Spaces, Giovanni Colombo, Vladimir V. Goncharov, Boris S. Mordukhovich
Mathematics Research Reports
This paper concerns the study of a general minimal time problem with a convex constant dynamic and a closed target set in Banach spaces. We pay the main attention to deriving efficient conditions for the major well-posedness properties that include the existence and uniqueness of optimal solutions as well as certain regularity of the optimal value function with respect to state variables. Most of the results obtained are new even in finite-dimensional spaces. Our approach is based on advanced tools of variational analysis and generalized differentiation.
Web Reviews, Lisa Johnston
Nist Tour Attendees At 2009 Annual Conference
Memory Reconsolidation For Natural Language Processing, Kum Tu, David Cooper, Hava Siegelmann
Memory Reconsolidation For Natural Language Processing, Kum Tu, David Cooper, Hava Siegelmann
Hava Siegelmann
We propose a model of memory reconsolidation that can output new sentences with additional meaning after refining information from input sentences and integrating them with related prior experience. Our model uses available technology to first disambiguate the meanings of words and extracts information from the sentences into a structure that is an extension to semantic networks. Within our long-term memory we introduce an action relationships database reminiscent of the way symbols are associated in brain, and propose an adaptive mechanism for linking these actions with the different scenarios. The model then fills in the implicit context of the input and …
Thermocapillary Effects In Driven Dewetting And Self-Assembly Of Pulsed Laser-Irradiated Metallic Films, Mikhail Khenner
Thermocapillary Effects In Driven Dewetting And Self-Assembly Of Pulsed Laser-Irradiated Metallic Films, Mikhail Khenner
Mikhail Khenner
A mathematical model for the evolution of pulsed laser-irradiated, molten metallic films has been developed using the lubrication theory. The heat transfer problem that incorporates the absorbed heat from a single laser beam or the interfering laser beams is solved analytically. Using this temperature field, we derive the 3D long-wave evolution PDE for the film height. To get insights into dynamics of dewetting, we study the 2D version of the evolution equation by means of a linear stability analysis and by numerical simulations. The stabilizing and destabilizing effects of various system parameters, such as the reflectivity, the peak laser beam …
Mining Data From Multiple Software Development Projects, Huanjing Wang, Taghi M. Khoshgoftaar, Kehan Gao, Naeem Seliya
Mining Data From Multiple Software Development Projects, Huanjing Wang, Taghi M. Khoshgoftaar, Kehan Gao, Naeem Seliya
Dr. Huanjing Wang
A large system often goes through multiple software project development cycles, in part due to changes in operation and development environments. For example, rapid turnover of the development team between releases can influence software quality, making it important to mine software project data over multiple system releases when building defect predictors. Data collection of software attributes are often conducted independent of the quality improvement goals, leading to the availability of a large number of attributes for analysis. Given the problems associated with variations in development process, data collection, and quality goals from one release to another emphasizes the importance of …
Short-Wavelength Technology And The Potential For Distributed Networks Of Small Radar Systems, David Mclaughlin, David Pepyne, Brenda Philips, James Kurose, Michael Zink, David Westbrook, Eric Lyons, Eric Knapp, Anthony Hopf, Alfred Defonzo, Robert Contreras, Theodore Djaferis, Edin Insanic, Stephen Frasier, V. Chandrasekar, Francesc Junyent, Nitin Bharadwaj, Yanting Wang, Yuxiang Liu, Brenda Dolan, Kelvin Droegemeier, Jerald Brotzge, Ming Xue, Kevin Kloesel, Keith Brewster, Frederick Carr, Sandra Cruz-Pol, Kurt Hondl, Pavlos Kollias
Short-Wavelength Technology And The Potential For Distributed Networks Of Small Radar Systems, David Mclaughlin, David Pepyne, Brenda Philips, James Kurose, Michael Zink, David Westbrook, Eric Lyons, Eric Knapp, Anthony Hopf, Alfred Defonzo, Robert Contreras, Theodore Djaferis, Edin Insanic, Stephen Frasier, V. Chandrasekar, Francesc Junyent, Nitin Bharadwaj, Yanting Wang, Yuxiang Liu, Brenda Dolan, Kelvin Droegemeier, Jerald Brotzge, Ming Xue, Kevin Kloesel, Keith Brewster, Frederick Carr, Sandra Cruz-Pol, Kurt Hondl, Pavlos Kollias
James Kurose
Dense networks of short-range radars capable of mapping storms and detecting atmospheric hazards are described. Composed of small X-band (9.4 GHz) radars spaced tens of kilometers apart, these networks defeat the Earth curvature blockage that limits today's long-range weather radars and enables observing capabilities fundamentally beyond the operational state-of-the-art radars. These capabilities include multiple Doppler observations for mapping horizontal wind vectors, subkilometer spatial resolution, and rapid-update (tens of seconds) observations extending from the boundary layer up to the tops of storms. The small physical size and low-power design of these radars permits the consideration of commercial electronic manufacturing approaches and …
Solar Ready Buildings Planning Guide, L. Lisell, T. Tetreault, A. Watson
Solar Ready Buildings Planning Guide, L. Lisell, T. Tetreault, A. Watson
Publications (E)
This document identifies the important aspects of building design and construction to enable installation of solar photovoltaic and heating systems at some time after the building is constructed. This document addresses photovoltaic (PV), solar hot water (ST), and solar ventilation preheat (SVP) systems.
Reflective Optics Cpv Panels Enabling Large Scale, Reliable Generation Of Solar Energy Cost Competitive With Fossil Fuels, S. Horne, M. Mcdonald, N. Hartsoch, K. Desy
Reflective Optics Cpv Panels Enabling Large Scale, Reliable Generation Of Solar Energy Cost Competitive With Fossil Fuels, S. Horne, M. Mcdonald, N. Hartsoch, K. Desy
Publications (E)
The objective of this 18 month subcontract was the improvement of reflective optics CPV panels to enable the large-scale, reliable production of solar electricity to meet SAI-established LCOE targets, and ultimately provide a path to solar power at parity with or better than the cost of energy generated utilizing fossil fuels. To this end, SolFocus has completed this subcontract with great success as evidenced by the end results of a CPV panel with conversion efficiencies greater than the targeted 22% and manufacturing capabilities with a run rate capacity far exceeding the milestone benchmark >3MW.
Wind Energy And Power System Operations: A Review Of Wind Integration Studies To Date, Jennifer Decesaro, Kevin Porter
Wind Energy And Power System Operations: A Review Of Wind Integration Studies To Date, Jennifer Decesaro, Kevin Porter
Publications (E)
This paper provides an overview of the challenges associated with wind integration and summarizes the findings of the wind integration studies conducted over the course of the past five years. We begin with an overview of the approximate time frames used in grid operations. We then describe how wind integration studies are conducted, discuss the results on wind integration costs and grid impacts from these grid integration studies, and assess some of the grid planning and operation changes that may be necessary to incorporate higher levels of wind generation. We close with several conclusions.
Economic Investigation Of Community-Scale Versus Building Scale Net-Zero Energy, N. Fernandez, S. Katipamula, M. R. Brambley, T. A. Reddy
Economic Investigation Of Community-Scale Versus Building Scale Net-Zero Energy, N. Fernandez, S. Katipamula, M. R. Brambley, T. A. Reddy
Publications (E)
The study presented in this report examines issues concerning whether achieving net-zero energy performance at the community scale provides economic and potentially overall efficiency advantages over strategies focused on individual buildings.
Wind Energy Assessment Study For Nevada -- Tall Tower Deployment (Stone Cabin), Darko Koracin, R. Reinhardt, Gregory D. Mccurdy, Marshall Liddle, Travis E. Mccord, Ramesh Vellore, Timothy B. Minor, Bradley F. Lyles, D. Miller, Lycia M. Ronchetti
Wind Energy Assessment Study For Nevada -- Tall Tower Deployment (Stone Cabin), Darko Koracin, R. Reinhardt, Gregory D. Mccurdy, Marshall Liddle, Travis E. Mccord, Ramesh Vellore, Timothy B. Minor, Bradley F. Lyles, D. Miller, Lycia M. Ronchetti
Publications (E)
The objective of this work effort was to characterize wind shear and turbulence for representative wind-developable areas in Nevada.
Lead Optimization Of Cox-2 Inhibitor Nimesulide Analogs To Overcome Aromatase Inhibitor Resistance In Breast Cancer Cells, Bin Su, Shiuan Chen
Lead Optimization Of Cox-2 Inhibitor Nimesulide Analogs To Overcome Aromatase Inhibitor Resistance In Breast Cancer Cells, Bin Su, Shiuan Chen
Chemistry Faculty Publications
A series of COX-2 selective inhibitor nimesulide derivatives were synthesized. Their anti-cell proliferation activities were evaluated with a long-term estrogen deprived MCF-7aro (LTEDaro) breast cancer cell line, which is the biological model of aromatase inhibitor resistance for hormone-dependent breast cancer. Compared to nimesulide which inhibited LTEDaro cell proliferation with an IC50 at 170.30 μM, several new compounds showed IC50 close to 1.0 μM.
Synthesis And Cytotoxic Analysis Of Some Disodium 3Β,6Β-Dihydroxysterol Disulfates, Jianguo Cui, Hui Wang, Yi Xin, Aimin Zhou
Synthesis And Cytotoxic Analysis Of Some Disodium 3Β,6Β-Dihydroxysterol Disulfates, Jianguo Cui, Hui Wang, Yi Xin, Aimin Zhou
Chemistry Faculty Publications
Disodium 3β,6β-dihydroxy-5α-cholestane disulfate (1) was synthesized in 4 steps with a high overall yield from cholesterol. First, cholesterol (4a) was converted to cholest-4-en-3,6-dione (5a) via oxidation with pyridinium chlorochromate (PCC) and then 5a was reduced by NaBH4 in the presence of NiCl2 to produce cholest-3β,6β-diol (6a). The reaction of 6a with the triethylamine-sulfur trioxide complex generated diammonium 3β,6β-dihydroxy-5α-cholestane disulfate (7a) and the treatment of 7a by cation exchange resin 732 (sodium form)(Na+) yielded the target steroid 1. Disodium 24-ethyl-3β,6β-dihydroxycholest-22-ene disulfate (2) and disodium 24-ethyl-3β,6β-dihydroxycholestane disulfate (3) were synthesized using a similar method. The cytotoxicity of these compounds against Sk-Hep-1 (human …
Thermochromic Absorption And Photoluminescence In [Pt(Ppy)(Mu-Ph(2)Pz)](2), Aaron A. Rachford, Felix N. Castellano
Thermochromic Absorption And Photoluminescence In [Pt(Ppy)(Mu-Ph(2)Pz)](2), Aaron A. Rachford, Felix N. Castellano
Chemistry Faculty Publications
The temperature effects on the spectral properties and photophysics of a new d(8)-d(8) dinuclear Pt-II chromophore, [Pt(ppy)(mu-Ph(2)pz)](2) (ppy is 2-phenylpyridine and Ph(2)pz is 3,5-diphenylpyrazolate), have been investigated. The thermochromic shifts are tentatively ascribed to intramolecular sigma interactions between the two pseudocofacial d(Z2) orbitals. Substantial emission profile changes occur in the solid state, solution, and doped polymer films.
Wku Campus Wide Holiday Energy Conservation Plan, Wku Sustainability Committee, Christian Ryan-Downing
Wku Campus Wide Holiday Energy Conservation Plan, Wku Sustainability Committee, Christian Ryan-Downing
Sustainability Publications and Resources
No abstract provided.