Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

2007

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 6181 - 6210 of 6763

Full-Text Articles in Physical Sciences and Mathematics

Efficient Fair Algorithms For Message Communication, Sergey Gorinsky, Eric J. Friedman, Shane Henderson, Christoph Jechlitschek Jan 2007

Efficient Fair Algorithms For Message Communication, Sergey Gorinsky, Eric J. Friedman, Shane Henderson, Christoph Jechlitschek

All Computer Science and Engineering Research

A computer network serves distributed applications by communicating messages between their remote ends. Many such applications desire minimal delay for their messages. Beside this efficiency objective, allocation of the network capacity is also subject to the fairness constraint of not shutting off communication for any individual message. Processor Sharing (PS) is a de facto standard of fairness but provides significantly higher average delay than Shortest Remaining Processing Time (SRPT), which is an optimally efficient but unfair algorithm. In this paper, we explore efficient fair algorithms for message communication where fairness means that no message is delivered later than under PS. …

Go to article

Context-Aware Publish Subscribe In Mobile Ad Hoc Networks, Davide Frey, Gruia-Catalin Roman Jan 2007

Context-Aware Publish Subscribe In Mobile Ad Hoc Networks, Davide Frey, Gruia-Catalin Roman

All Computer Science and Engineering Research

The publish-subscribe communication paradigm is enjoying increasing popularity thanks to its ability to simplify the development of complex distributed applications. However, existing solutions in the publish-subscribe domain address only part of the challenges associated with the development of applications in dynamic scenarios such as mobile ad hoc networks. Mobile applications must be able to assist users in a variety of situations, responding not only to their inputs but also to the characteristics of the environment in which they operate. In this paper, we address these challenges by extending the publish-subscribe paradigm with the ability to manage and exploit context information …

Go to article

A Comparison Of Print Advertisements From Egypt, Lebanon, Kuwait, Saudi Arabia, United Arab Emirates And The United States, Gilberto De Los Santos, Caroline Fisher, Salma Ghanem, Morris Kalliny, Anshu Saran Jan 2007

A Comparison Of Print Advertisements From Egypt, Lebanon, Kuwait, Saudi Arabia, United Arab Emirates And The United States, Gilberto De Los Santos, Caroline Fisher, Salma Ghanem, Morris Kalliny, Anshu Saran

Business and Information Technology Faculty Research & Creative Works

This study examines cultural differences between the United States and the Arab world regarding low/high context, collectivism/individualism, time orientation and man's relationship with nature in print advertising. Study reveals that the main differences between the United States and the Arab world include cultural values that are embedded in religious values and beliefs.

Go to article

Cultural Values Reflected In Arab And American Television Advertising, Morris Kalliny, Lance Gentry Jan 2007

Cultural Values Reflected In Arab And American Television Advertising, Morris Kalliny, Lance Gentry

Business and Information Technology Faculty Research & Creative Works

This study examines cultural values as reflected in U.S. And the Arab world television advertising. A total of 866 television commercials from Egypt, Kuwait, Lebanon, Saudi Arabia, United Arab Emirates and the United States were analyzed. Contrary to the common notion that the U.S. culture and the Arabic culture are vastly different, we found many similarities between the two cultures regarding TV advertising content and appeal. The findings contribute to the debate of standardization versus adaptation of international advertising.

Go to article

Forecasting Consumer Adoption Of Technological Innovation: Choosing The Appropriate Diffusion Models For New Products And Services Before Launch, Roger Calantone, Lance Gentry Jan 2007

Forecasting Consumer Adoption Of Technological Innovation: Choosing The Appropriate Diffusion Models For New Products And Services Before Launch, Roger Calantone, Lance Gentry

Business and Information Technology Faculty Research & Creative Works

There are many good articles on various forecasting models. There is consensus that no single diffusion model is best for every situation. Experts in the field have asked for studies to provide empirical-based guidelines for recommending when various models should be used. This research investigates multiple diffusion models and provides recommendations for which diffusion models are appropriate for radical and really new products and services before the launch of the innovation.

Go to article

Sedimentation Patterns In A Stabilized Migratory Inlet, Blind Pass, Florida, Ping Wang, David K. Tidwell, Tanya Beck, Nicholas C. Kraus Jan 2007

Sedimentation Patterns In A Stabilized Migratory Inlet, Blind Pass, Florida, Ping Wang, David K. Tidwell, Tanya Beck, Nicholas C. Kraus

Geology Faculty Publications

The shoaling rate in Blind Pass entrance channel approximately equals the net southward longshore sediment transport rate. Most of the shoaling occurs along the northern side of the channel. Flow measurements and numerical modeling reveal that the ebb current is approximately twice as strong in the thalweg along the south side as compared to the rest of the channel. In contrast, the flood current is mainly uniform across the inlet and is stronger than the ebb flow over the northern portion. This flow-velocity distribution induced by a nearly 90-deg bend of the channel contributes to the shoaling pattern. Two years …

Go to article

Why De Minimis?, Matthew D. Adler Jan 2007

Why De Minimis?, Matthew D. Adler

Faculty Scholarship

De minimis cutoffs are a familiar feature of risk regulation. This includes the quantitative individual risk thresholds for fatality risks employed in many contexts by EPA, FDA, and other agencies, such as the 1-in-1 million lifetime cancer risk cutoff; extreme event cutoffs for addressing natural hazards, such as the 100 - year - flood or 475 - year - earthquake; de minimis failure probabilities for built structures; the exclusion of low - probability causal models; and other policymaking criteria. All these tests have a common structure, as I show in the Article. A de minimis test, broadly defined, tells the …

Go to article

Kinematics Of The Nicaraguan Forearc From Gps Geodesy, Henry L. Turner, Peter Lafemina, Armando Saballos, Glen S. Mattioli, Pamela E. Jansma, Timothy H. Dixon Jan 2007

Kinematics Of The Nicaraguan Forearc From Gps Geodesy, Henry L. Turner, Peter Lafemina, Armando Saballos, Glen S. Mattioli, Pamela E. Jansma, Timothy H. Dixon

School of Geosciences Faculty and Staff Publications

Campaign GPS data from a network in the Nicaraguan forearc show a strong component of arc-parallel motion indicating northwest translation of a nearly rigid forearc sliver. Our measured mean velocity for forearc sites of 15.1 mm yr−1 agrees well with the arc-parallel sliver motion predicted previously by DeMets (2001) derived from closure constraints on oblique convergence between the Cocos and Caribbean plates. The lack of a northeasterly oriented arc-normal component of motion in forearc velocities indicates that there are complexities involved beyond a simple interpretation of sliver motion being driven by oblique convergence. The forearc is reasonably well-fit by …

Go to article

Observation Of Glacial Isostatic Adjustment In “Stable” North America With Gps, Giovanni F. Sella, Seth Stein, Timothy H. Dixon, Michael Craymer, Thomas S. James, Stephane Mazzotti, Roy K. Dokka Jan 2007

Observation Of Glacial Isostatic Adjustment In “Stable” North America With Gps, Giovanni F. Sella, Seth Stein, Timothy H. Dixon, Michael Craymer, Thomas S. James, Stephane Mazzotti, Roy K. Dokka

School of Geosciences Faculty and Staff Publications

Motions of three hundred and sixty Global Positioning System (GPS) sites in Canada and the United States yield a detailed image of the vertical and horizontal velocity fields within the nominally stable interior of the North American plate. By far the strongest signal is the effect of glacial isostatic adjustment (GIA) due to ice mass unloading during deglaciation. Vertical velocities show present-day uplift (∼10 mm/yr) near Hudson Bay, the site of thickest ice at the last glacial maximum. The uplift rates generally decrease with distance from Hudson Bay and change to subsidence (1–2 mm/yr) south of the Great Lakes. The …

Go to article

The Biophysical Analysis Of The Human Telomeric Repeat (Ttaggg)4 And Characterization Of Porphyrin Binding In Potassium Solutions, Cosimo Antonacci Jan 2007

The Biophysical Analysis Of The Human Telomeric Repeat (Ttaggg)4 And Characterization Of Porphyrin Binding In Potassium Solutions, Cosimo Antonacci

Seton Hall University Dissertations and Theses (ETDs)

.

Go to article

Understanding Charged Aerosol Detection With High Performance Liquid Chromatography, Brian John Forsatz Jan 2007

Understanding Charged Aerosol Detection With High Performance Liquid Chromatography, Brian John Forsatz

Seton Hall University Dissertations and Theses (ETDs)

.

Go to article

Synthesis And Characterization Of Arylmethyl Sulfone Dendrimers And Hyperbranched Poly (Phenylene Sulfide) / Poly (Sulfone), Qiuxia Zhao Jan 2007

Synthesis And Characterization Of Arylmethyl Sulfone Dendrimers And Hyperbranched Poly (Phenylene Sulfide) / Poly (Sulfone), Qiuxia Zhao

Seton Hall University Dissertations and Theses (ETDs)

.

Go to article

Studies Toward Improving The Reactivity And Chemoselectivity Of Chloroarenes In Palladium-Catalyzed Cross-Coupling Processes, Joseph P. Simeone Jan 2007

Studies Toward Improving The Reactivity And Chemoselectivity Of Chloroarenes In Palladium-Catalyzed Cross-Coupling Processes, Joseph P. Simeone

Seton Hall University Dissertations and Theses (ETDs)

.

Go to article

Kentucky Structural Contours From Digitally Vectorized Geologic Quadrangles, Kentucky Geological Survey Jan 2007

Kentucky Structural Contours From Digitally Vectorized Geologic Quadrangles, Kentucky Geological Survey

Research Data--KGS

This dataset includes geologic stuctural contours of varying datums across Kentucky in shapefile format. These structural contours are compiled from structural contour layers published as a part of the individual Digitally Vectorized Geologic Quadrangles (DVGQ) datasets (by the Kentucky Geologic Survey: https://kgs.uky.edu/kygeode/services/pubs/?pubtype=DVGQ&searchtype=pubcategory). The original structural contours were mapped on the 7.5-minute (1:24,000 scale) series geologic maps published during the Kentucky geologic mapping program (Kentucky Geological Survey - U.S. Geological Survey from 1960 to 1989: https://kgs.uky.edu/kygeode/services/pubs/?pubtype=GQ&searchtype=pubcategory). The digital contours were subsequently digitized as a part of the DVGQ datasets during the geologic digital mapping program at KGS (1996 – 2007). Contoured …

Go to article

Jonas Kamlet (1914-1960) Chemist/Entrepreneur, Dean F. Martin, Barbara B. Martin Jan 2007

Jonas Kamlet (1914-1960) Chemist/Entrepreneur, Dean F. Martin, Barbara B. Martin

Chemistry Faculty Publications

Jonas Kamlet, Ph.D., as a chemist, inventor, and a significant entrepreneur who founded Kamlet Laboratories in New York City that became the model of a successful consulting firm. Among his hundreds of patents and inventions were a tablet that could be used to measure glucose in urine, a treated strip that could detect pregnancy, a fodder for ruminants that used newsprint, and biuret (a self-condensation product of urea) that could be used as a non-protein component of fodder. Following his death in an airplane collision on December 16, 1960, his wife and collaborator (and later a resident of Florida) carried …

Go to article

A Model-Driven Approach To Job/Task Composition In Cluster Computing, Yogesh Kanitkar, Konstantin Läufer, Neeraj Mehta, George K. Thiruvathukal Jan 2007

A Model-Driven Approach To Job/Task Composition In Cluster Computing, Yogesh Kanitkar, Konstantin Läufer, Neeraj Mehta, George K. Thiruvathukal

Computer Science: Faculty Publications and Other Works

In the general area of high-performance computing, object-oriented methods have gone largely unnoticed. In contrast, the Computational Neighborhood (CN), a framework for parallel and distributed computing with a focus on cluster computing, was designed from ground up to be object-oriented. This paper describes how we have successfully used UML in the following model-driven, generative approach to job/task composition in CN. We model CN jobs using activity diagrams in any modeling tool with support for XMI, an XML-based external representation of UML models. We then export the activity diagrams and use our XSLT-based tool to transform the resulting XMI representation to …

Go to article

Variational Ground State Approach For A Tunnelling Exciton Coupled To Phonons, Dezider Kulak Jan 2007

Variational Ground State Approach For A Tunnelling Exciton Coupled To Phonons, Dezider Kulak

Turkish Journal of Physics

In this paper a variational study of a tunnelling exciton (Frenkel exciton) coupled to an arbitrary number of phonon modes is presented. The results of our model are presented both for weak non-adiabatic cases and for strong cases; and we come to the conclusion that the tunnelling reduction factor, the ground state energy of the tunnelling exciton-phonons system, and the mean number of ground state phonons, as the functions of the exciton-phonons coupling strength, are continuous, a condition that does not apply in cases of the tunnelling exciton-phonons models presented in the previous studies. In comparison with the previous studies, …

Go to article

Distribution Of Circles On A Circle And Correlation Between Vortex Rings Of Superfluids, Mehmet Onur Fen, Şaki̇r Erkoç Jan 2007

Distribution Of Circles On A Circle And Correlation Between Vortex Rings Of Superfluids, Mehmet Onur Fen, Şaki̇r Erkoç

Turkish Journal of Physics

Superfluids are characterized by absence of viscosity. When superfluids are rotated, differently from normal fluids, they form more than one vortex in the containers where they are placed. The number of vortices change as the rotation velocity changes, but this change is not linear. M.W. Zwierlein et al. observed the vortices in experiments, observing up to a number of 80. Experiments also showed that the vortex distributions cannot include large spaces. By using experimental data, we noticed that when we think of vortices as vortex rings, their centers are at the same geometric location and these geometric locations are concentric …

Go to article

Interface And Surface Optical Phonons Spectra In Wurtzite Nitride Quantum Well Wires: Size And Dielectric Effects, Li Zhang Jan 2007

Interface And Surface Optical Phonons Spectra In Wurtzite Nitride Quantum Well Wires: Size And Dielectric Effects, Li Zhang

Turkish Journal of Physics

By employing the method of electrostatic potential expansion, the interface optical (IO) and surface optical (SO) phonon modes and the corresponding Fröhlich-like electron-phonon-interaction Hamiltonian in a Q1D wurtzite cylindrical quantum well wire (QWW) embedded in nonpolar dielectric matrix are derived and studied based on the dielectric continuum model and Loudon's uniaxial crystal model. Numerical calculations for a wurtzite GaN/AlN QWW are mainly focused on the size- and dielectric-dependent IO and SO phonon spectra and electron-IO (SO)phonons coupling functions. Results reveal that, in general, there are two branches of IO phonon modes and one branch of SO mode in the system. …

Go to article

Role Of Sn In The Density Of Defect States In A-Se_{0.75}Te_{0.25} And A-Se_{0.85}Te_{0.15}Thin Films, N. Sharma, Santosh Kumar Jan 2007

Role Of Sn In The Density Of Defect States In A-Se_{0.75}Te_{0.25} And A-Se_{0.85}Te_{0.15}Thin Films, N. Sharma, Santosh Kumar

Turkish Journal of Physics

In this paper we report the effect of Sn incorporation in the density of defect states of two binary Se-Te glassy systems, comparing the properties of a-Se_{0.75}Te_{0.25}, a-Se_{0.85}Te_{0.15} and a-Se_{0.75}Te_{0.15}Sn_{0.10} glassy alloys. Properties of d.c. conductivity at high electric fields in vacuum were examined; and current-voltage (I-V) characteristics have been measured at various fixed temperatures. Ohmic behavior is observed at low electric fields; while at high electric fields (E \sim 10^4 V/cm), non-ohmic behavior is observed. An analysis of the experimental data confirms the presence of space charge limited conduction (SCLC) in the studied glassy materials. Density of defect states …

Go to article

Thickness Dependent Structural, Electrical And Optical Properties Of Chemically Deposited Nanopartical Pbs Thin Films, A. U. Ubale, A. R. Junghare, N. A. Wadibhasme, A. S. Daryapurkar, R. B. Mankar, V. S. Sangawar Jan 2007

Thickness Dependent Structural, Electrical And Optical Properties Of Chemically Deposited Nanopartical Pbs Thin Films, A. U. Ubale, A. R. Junghare, N. A. Wadibhasme, A. S. Daryapurkar, R. B. Mankar, V. S. Sangawar

Turkish Journal of Physics

Nanostructured thin films have attracted the attention of an increasing number of researchers from several disciplines during the last ten years, due to their outstanding electronic and optical properties and extensively useful applications in various optoelectronic devices. PbS thin films were deposited onto glass substrate by the method of chemical bath deposition (CBD) at 330 K temperature. The structure and surface morphology of the films were characterized by X-ray diffraction and scanning electron microscopy. The optical investigation showed that, depending on thickness films have direct allowed transitions in the range 1.88-2.28 eV. The decrease in dc dark resistivity with increase …

Go to article

Evaluations Of Resonance Parameters And Resonance Integral Of Tungsten, A.K.M. Moinul Haque Meaze Jan 2007

Evaluations Of Resonance Parameters And Resonance Integral Of Tungsten, A.K.M. Moinul Haque Meaze

Turkish Journal of Physics

I present evaluated values of resonance parameters and resonance integral for natural tungsten on the basis of experimental transmissions data obtained at the Pohang Neutron Facility (PNF), Republic of Korea. Resonance parameters were obtained by using the Bayesian code SAMMY. The output values of SAMMY were used to evaluate the resonance integral for the capture cross-section.

Go to article

Exact Analytical Solution Of The Diode Ideality Factor Of A Pn Junction Device Using Lambert W-Function Model, Habi̇be Bayhan, A. Sertap Kavasoglu Jan 2007

Exact Analytical Solution Of The Diode Ideality Factor Of A Pn Junction Device Using Lambert W-Function Model, Habi̇be Bayhan, A. Sertap Kavasoglu

Turkish Journal of Physics

The paper presents a new analytical method for extracting the diode ideality factor of a p-n junction device using Lambert W-function model and the dark current-voltage data. The extracted values are found to be in good agreement with those calculated experimentally from dark current-voltage characteristics.

Go to article

Constraints On The Origin Of The Balıkesir Thermal Waters (Turkey) From Stable Isotope (\Delta^{18}O, \Deltad, \Delta^{13}C, \Delta^{34}S) And Major-Trace Element Compositions, Hali̇m Mutlu Jan 2007

Constraints On The Origin Of The Balıkesir Thermal Waters (Turkey) From Stable Isotope (\Delta^{18}O, \Deltad, \Delta^{13}C, \Delta^{34}S) And Major-Trace Element Compositions, Hali̇m Mutlu

Turkish Journal of Earth Sciences

The Balıkesir thermal waters in northwestern Turkey have discharge temperatures in the range of 31.8-98.5 ºC, near neutral pH values of 6.40 to 8.40 and TDS contents between 327 and 2578 mg/l. Samples display variable chemical compositions changing from high-temperature Na_2SO_4-NaHCO_3 waters to warmer CaHCO_3 waters. Trace element concentrations of the waters show significant variation. Comparison between the concentrations of alkaline earth metals in waters and carbonate deposits reveals mobile behavior for Mg and Ba. The ratio of strontium to calcium concentrations in solid and liquid phases was found to be almost the same. Li/Cs and B/Cl ratios of waters …

Go to article

Virginia Game Fish Tagging Program Annual Report 2006, John A. Lucy, C.M. Bain Iii Jan 2007

Virginia Game Fish Tagging Program Annual Report 2006, John A. Lucy, C.M. Bain Iii

Reports

The Virginia Game Fish Tagging Program (VGFTP), initiated in 1995, coordinates tagging and a tag-recapture fish database generated through contributed efforts of a dedicated corps of trained marine anglers. Through 2006, the program’s database includes over 103,000 tagged fish records of tag-released fish and approximately over 10,300 recapture records (Table 4).

Go to article

Sands Of The Chesapeake, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, George R. Thomas Jan 2007

Sands Of The Chesapeake, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, George R. Thomas

Reports

This is a short phamplet outlining the origin, composition, and dune structure of sandy shores of the Chesapeake Bay region.

Go to article

Theoretical Investigation Of The Structure And Vibrational Frequencies Of Water And Methanol Complexes, John Michael Craig Jan 2007

Theoretical Investigation Of The Structure And Vibrational Frequencies Of Water And Methanol Complexes, John Michael Craig

Theses and Dissertations

Water and methanol are common solvents used in liquid chromatographic (LC) separations. It is highly desirable to model .the interactions of these solvents in order to better understand the nature of analyte solvation and its effect on retention. Therefore, structure and frequencies of complexes of these solvent molecules have been studied from a theoretical perspective as a first step in this direction. Specifically, cluster structures have been optimized at the RHF and MP2 levels in various flexible basis sets and with the counterpoise correction for basis set superposition error, and trends in the structure and binding energies of several clusters …

Go to article

Study Of Covalent And Non-Covalent Interactions In Ternary Systems Involving: Metal/Dna-Rna/Protein, Where Metal = Platinum(Ii), Palladium(Ii), Anzellotti I. Atilio Jan 2007

Study Of Covalent And Non-Covalent Interactions In Ternary Systems Involving: Metal/Dna-Rna/Protein, Where Metal = Platinum(Ii), Palladium(Ii), Anzellotti I. Atilio

Theses and Dissertations

Ternary systems comprising DNA/RNA, proteins and one (or more) metal ion are generating increased interest due to its biological relevance. The knowledge gained from the study of these systems could provide important clues regarding the precise mechanism for transcription factors, repair proteins and metal complexes with anti-tumoral/anti-viral activities.The interactions occurring among the components of these ternary systems can be broadly grouped into covalent and non-covalent. The first kind of interactions can lead to the irreversible transformation of the components in the system, while the second is thought to be reversible leading to transient states and fluxionality. Both kinds of interaction …

Go to article

The Sheffer Group And The Riordan Group, Tian-Xiao He, Peter Shiue, Leetsch Hsu Jan 2007

The Sheffer Group And The Riordan Group, Tian-Xiao He, Peter Shiue, Leetsch Hsu

Scholarship

We define the Sheffer group of all Sheffer-type polynomials and prove the isomorphism between the Sheffer group and the Riordan group. An equivalence of the Riordan array pair and generalized Stirling number pair is also presented. Finally, we discuss a higher dimensional extension of Riordan array pairs.

Go to article

Construction Of Biorthogonal B-Spline Type Wavelet Sequences With Certain Regularities, Tian-Xiao He Jan 2007

Construction Of Biorthogonal B-Spline Type Wavelet Sequences With Certain Regularities, Tian-Xiao He

Scholarship

No abstract provided.

Go to article

First Prev Next Last