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Articles 181 - 210 of 7680
Full-Text Articles in Physical Sciences and Mathematics
Reactivity Of Phenyldi(2-Thienyl)Phosphine Towards Group 7 Metal Carbonyls: Carbon–Phosphorus Bond Activation, Shishir Ghosh, Alok K. Das, Noorjahan Begum, Daniel T. Haworth, Sergey Lindeman, James R. Gardinier, Tasneem A. Siddiquee, Dennis W. Bennett, Ebbe Nordlander, Graeme Hogarth, Shariff E. Kabir
Reactivity Of Phenyldi(2-Thienyl)Phosphine Towards Group 7 Metal Carbonyls: Carbon–Phosphorus Bond Activation, Shishir Ghosh, Alok K. Das, Noorjahan Begum, Daniel T. Haworth, Sergey Lindeman, James R. Gardinier, Tasneem A. Siddiquee, Dennis W. Bennett, Ebbe Nordlander, Graeme Hogarth, Shariff E. Kabir
Chemistry Faculty Research and Publications
Addition of phenyldi(2-thienyl)phosphine (PPhTh2) to [Re2(CO)10−n(NCMe)n] (n = 1, 2) affords the substitution products [Re2(CO)10−n(PhPTh2)n] (1, 2) together with small amounts of fac-[ClRe(CO)3(PPhTh2)2] (3) (n = 2). Reaction of [Re2(CO)10] with PPhTh2in refluxing xylene affords a mixture which includes 2, [Re2(CO)7(PPhTh2)(μ-PPhTh)(μ-H)] (4), [Re2(CO)7(PPhTh2)(μ-PPhTh)(μ-η1,κ1(S)-C4H3S)] (5) and …
A 236-Ghz Fe3+ Epr Study Of Nanoparticles Of The Ferromagnetic Room-Temperature Semiconductor Sn1-XFeXO2 (X = 0.005), Sushil K. Misra, S. I. Andronenko, Alex Punnoose, Dmitry Tipikin, J. H. Freed
A 236-Ghz Fe3+ Epr Study Of Nanoparticles Of The Ferromagnetic Room-Temperature Semiconductor Sn1-XFeXO2 (X = 0.005), Sushil K. Misra, S. I. Andronenko, Alex Punnoose, Dmitry Tipikin, J. H. Freed
Physics Faculty Publications and Presentations
High-frequency (236 GHz) electron paramagnetic resonance (EPR) studies of Fe3+ ions at 255 K are reported in a Sn1-xFexO2 powder with x = 0.005, which is a ferromagnetic semiconductor at room temperature. The observed EPR spectrum can be simulated reasonably well as the overlap of spectra due to four magnetically inequivalent high-spin (HS) Fe3+ ions (S = 5/2). The spectrum intensity is calculated, using the overlap I(BL) + (I(HS1) + I(HS2) + I(HS3) + I(HS4)) 9 x e-0.00001xB, where B is the magnetic field intensity …
Uniform Stabilization Of N-Dimensional Vibrating Equation Modeling ‘Standard Linear Model’ Of Viscoelasticity, Ganesh C. Gorain
Uniform Stabilization Of N-Dimensional Vibrating Equation Modeling ‘Standard Linear Model’ Of Viscoelasticity, Ganesh C. Gorain
Applications and Applied Mathematics: An International Journal (AAM)
In this paper, we deal with the elastic vibrations of flexible structures modeled by the ‘standard linear model’ of viscoelasticity in n-dimensional space. We study the uniform exponential stabilization of such kind of vibrations after incorporating separately very small amount of passive viscous damping and internal material damping of Kelvin-Viogt type in the model. Explicit forms of exponential energy decay rates are obtained by a direct method, for the solution of such boundary value problems without having to introduce any boundary feedback.
Optimal Filtering Of An Advertising Production System With Deteriorating Items, Lakhdar Aggoun, Ali Benmerzouga, Lotfi Tadj
Optimal Filtering Of An Advertising Production System With Deteriorating Items, Lakhdar Aggoun, Ali Benmerzouga, Lotfi Tadj
Applications and Applied Mathematics: An International Journal (AAM)
In this paper, we consider an integrated stochastic advertising-production system in the case of a duopoly. Two firms spend certain amounts to advertise some product. The expenses processes evolve according to the jumps of two homogeneous, finite-state Markov chains. We assume that the items in stock may be subject to deterioration and the deterioration parameter is assumed to be random.
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.
Approximating Stationary Statistical Properties, Xiaoming Wang
Approximating Stationary Statistical Properties, Xiaoming Wang
Mathematics and Statistics Faculty Research & Creative Works
It is well-known that physical laws for large chaotic dynamical systems are revealed statistically. Many times these statistical properties of the system must be approximated numerically. the main contribution of this manuscript is to provide simple and natural criterions on numerical methods (temporal and spatial discretization) that are able to capture the stationary statistical properties of the underlying dissipative chaotic dynamical systems asymptotically. the result on temporal approximation is a recent finding of the author, and the result on spatial approximation is a new one. Applications to the infinite Prandtl number model for convection and the barotropic quasi-geostrophic model are …
Climate Change, Coral Reef Ecosystems, And Management Options For Marine Protected Areas, Brian D. Keller, Daniel F. Gleason, Elizabeth Mcleod, Christa M. Woodley, Satie Airame, Billy D. Causey, Alan M. Friedlander, Rikki Grober-Dunsmore, Johanna E. Johnson, Steven Miller, Robert S. Steneck
Climate Change, Coral Reef Ecosystems, And Management Options For Marine Protected Areas, Brian D. Keller, Daniel F. Gleason, Elizabeth Mcleod, Christa M. Woodley, Satie Airame, Billy D. Causey, Alan M. Friedlander, Rikki Grober-Dunsmore, Johanna E. Johnson, Steven Miller, Robert S. Steneck
Marine & Environmental Sciences Faculty Articles
Marine protected areas (MPAs) provide place-based management of marine ecosystems through various degrees and types of protective actions. Habitats such as coral reefs are especially susceptible to degradation resulting from climate change, as evidenced by mass bleaching events over the past two decades. Marine ecosystems are being altered by direct effects of climate change including ocean warming, ocean acidification, rising sea level, changing circulation patterns, increasing severity of storms, and changing freshwater influxes. As impacts of climate change strengthen they may exacerbate effects of existing stressors and require new or modified management approaches; MPA networks are generally accepted as an …
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.
Best Practices For Information Services, Sara Davis
Best Practices For Information Services, Sara Davis
Sci-Tech News
No abstract provided.
Engineering Division News, Dianna Magnoni
Aerospace Section News, Gale Harris
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 …