Physical Sciences and Mathematics Commons^™

The Many Symmetries Of Calabi–Yau Compactifications, Moataz Emam

Moataz Emam

No abstract provided.

Bismuth(Iii) Bromide In Organic Synthesis. A Catalytic Method For The Allylation Of Tetrahydrofuranyl And Tetrahydropyranyl Ethers, Ram S. Mohan, Scott W. Krabbe, Veronica V. Angeles

Ram S. Mohan

Estimation Of The Area Of Sealed Soil Using Gis Technology And Remote Sensing, Stanisław Białousz, Przemysław Kupidura

Przemysław Kupidura

Soil sealing can be defined as the destruction or covering of soil by buildings, constructions and artificial layers completely or partly impermeable (asphalt, concrete, etc.) It is the most intense form of land consumption and is essentially an irreversible process. Soil is sealed when agricultural or other biologically land is taken into the built environment. It is also a continuing process within existing urban areas, especially where urban population and the density of built structures is increasing and residual inner-city green zones are reduced. The paper concerns the methodology for an estimation of the area of sealed soil using GIS …

Forward Modeling Synsedimentary Deformation Associated With A Prograding Steep-Sloped Carbonate Margin, Phillip G. Resor

Phillip G Resor

Differential compaction associated with prograding and aggrading steep-rimmed carbonate margins leads to penecontemporaneous and post- depositional modifications of stratal geometries and tensile and shear stress concentrations that result in brittle deformation. In an effort to investigate controls on these deformation processes, we employ a step-wise gravity loaded elastic model that captures pre-failure displacement and stress field patterns for a depositional geometry based on the Permian Capitan depositional system, Guadalupe Mountains, West Texas and New Mexico, USA. We consider four model geometries with varying progradation to aggradation (P/A) ratio, from strongly prograding (P/A=10) to strongly aggrading (P/A=0.1). The strongly prograding case …

Bayesian Inference For A Periodic Stochastic Volatility Model Of Intraday Electricity Prices, Michael S. Smith

Michael Stanley Smith

The Gaussian stochastic volatility model is extended to allow for periodic autoregressions (PAR) in both the level and log-volatility process. Each PAR is represented as a first order vector autoregression for a longitudinal vector of length equal to the period. The periodic stochastic volatility model is therefore expressed as a multivariate stochastic volatility model. Bayesian posterior inference is computed using a Markov chain Monte Carlo scheme for the multivariate representation. A circular prior that exploits the periodicity is suggested for the log-variance of the log-volatilities. The approach is applied to estimate a periodic stochastic volatility model for half-hourly electricity prices …

Bayesian Skew Selection For Multivariate Models, Michael S. Smith, Anastasios Panagiotelis

Michael Stanley Smith

We develop a Bayesian approach for the selection of skew in multivariate skew t distributions constructed through hidden conditioning in the manners suggested by either Azzalini and Capitanio (2003) or Sahu, Dey and Branco~(2003). We show that the skew coefficients for each margin are the same for the standardized versions of both distributions. We introduce binary indicators to denote whether there is symmetry, or skew, in each dimension. We adopt a proper beta prior on each non-zero skew coefficient, and derive the corresponding prior on the skew parameters. In both distributions we show that as the degrees of freedom increases, …

The Tangled Tale Of Phase Space, David D. Nolte

David D Nolte

Impact Of The Australia-Us Free Trade Agreement On Australian Medicines Regulation And Prices, Thomas A. Faunce, James Bai, Duy Nguyen

Thomas A Faunce

The Australia – United States Free Trade Agreement (AUSFTA) came into force on 1 January 2005. Before and subsequently to the AUSFTA being concluded, controversy surrounded the debate over its impact on Australia ’ s health policy, specifically on regulation of pharmaceutical patents and Australia ’ s cost-effectiveness system relating to prescription medicine prices known as the Pharmaceutical Benefits Scheme (PBS). This article examines the expectations of both parties in the pharmaceutical sector with regard to the AUSFTA, as well as how successfully they were achieved. It seeks to analyse important relevant outcomes for regulators, the public and pharmaceutical industry, …

Nanotechnology And The International Law Of Weaponry: Towards International Regulation Of Nano-Weapons., Thomas A. Faunce, Hitoshi Nasu

Thomas A Faunce

The development of nanotechnology for military application is an emerging area of research and development, the pace and extent of which has not been fully anticipated by international legal regulation. Nano-weapons are referred to here as objects and devices using nanotechnology or causing effects in nano-scale that are designed or used for harming humans. Such weapons, despite their controversial human and environmental toxicity, are not comprehensively covered by specific, targeted regulation under international law. This article critically examines current international humanitarian law and arms control law regimes to determine whether significant gaps exist in the regulation of nanotechnology focused on …

Pricing Residential Water To Account For Scarcity In Cyprus, Theodoros Zachariadis

Theodoros Zachariadis

No abstract provided.

Effect Of Spontaneous Gas Expansion And Mobilization On The Aqueous-Phase Concentrations Above A Dense Non-Aqueous Phase Liquid Pool., Kevin G. Mumford, James Smith, Sarah E. Dickson

Sarah E Dickson

This paper presents a framework to quantify the overall variability of the model estimations of Total Polychlorinated Biphenyls (Total PCBs) concentrations in the Niagara River on the basis of the uncertainty of few model parameters and the natural variability embedded in some of the model input variables. The results of the uncertainty analysis are used to understand the importance of stochastic model components and their effect on the overall reliability of the model output and to evaluate multiple sources of uncertainty that might need to be further studied. The uncertainty analysis is performed using a newly developed point estimate method, …

Interdependence Of In-Cell Xenon Density And Temperature During Rb/129xe Spin-Exchange Optical Pumping Using Vhg-Narrowed Laser Diode Arrays, Nicholas Whiting, Panayiotis Nikolaou, Neil A. Eschmann, Michael J. Barlow, Boyd M. Goodson

Nicholas Whiting

Wind Energy Deployment: Global Lessons For West Michigan, Erik Edward Nordman

Erik Edward Nordman

West Michigan Wind Assessment Issue Brief #1 This first of series of issue briefs summarizes the factors that have influenced wind energy deployment across the country and around the world. It also brings the lessons home to West Michigan's coastal zone.

Wind Power And Human Health: Flicker, Noise And Air Quality, Erik Edward Nordman

Erik Edward Nordman

West Michigan Wind Assessment Issue Brief #2 The second of a series of wind energy issue briefs synthesizes the state of the science around wind energy siting issues like flicker and noise, and analyzes how West Michigan communities are addressing these challenges. The issue brief also assesses how wind energy could improve air quality and human health outcomes in West Michigan and the region.

Designing Digital Library Of Perso-Arabic Script: An Experiment., Nadim Akhtar Khan, Rosy Jan, Sheikh Shazia

NADIM AKHTAR KHAN

The Greenstone digital library software is a comprehensive system for building and distributing digital library collections providing a new way for organizing and publishing information on the Internet. The paper describes how multilingual digital library collections can be created and customized using various features available in Greenstone Digital Library Software. It is an attempt towards creating and managing digital library collection in different scripts for M. Phil and Ph. D theses submitted to University of Kashmir in Arabic, Persian, Kashmiri and Urdu.

Knoor: Knowledge Repository Open Network., S M. Shafi, Nadim Akhtar Khan, Rosy Jan

NADIM AKHTAR KHAN

The paper discusses KNoor (Knowledge Repository Open Network) which aims at harvesting and aggregating the scholarly products emanating from research and scientific institutions of Jammu & Kashmir. The paper highlights genesis, significance, cooperation and various modules of access etc with screen shots as a unique cooperative, multilingual repository of research papers, ETDs and conference proceedings of three premier institutes of valley (University of Kashmir, Sher-e-Kashmir Institute of Medical sciences, Sher-e-Kashmir University of Agricultural Sciences) in the first phase. It also discusses challenges and lessons learnt in the process with a view to help other institutions to advance the mission of …

New 2-Aminoethylimidazole-Based Dicarboxylic Acid Receptor Derived From Cholestane, Jyoti Ramesh Jadhav, Md Wasi Ahmad, Hong Seok Kim

Dr. Mohammad Wasi Ahmad (Md Wasi Ahmad)

A new facial amphiphile cholestane-based receptor 1 containing a 2-imidazolylethylamino moiety at the 3a and 7a positions of cholestane was synthesized. Recognition selectivity of the new receptor 1 with various dicarboxylic acids was assessed by 1H NMR titration. Maleic acid showed the highest binding constant among all the tested acids

On The Statistical Accuracy Of Biomarker Assays Of Hiv Incidence, Ron Brookmeyer

Ron Brookmeyer

Objective: To evaluate the statistical accuracy of estimates of current HIV incidence rates from cross-sectional surveys, and to identify characteristics of assays that improve accuracy.

Methods: Performed mathematical and statistical analysis of the cross-sectional estimator of HIV incidence to evaluate bias and variance. Developed probability models to evaluate impact of long tails of the window period distribution on accuracy.

Results: The standard cross-sectional estimate of HIV incidence rate is estimating a time-lagged incidence where the lag time, called the shadow, depends on the mean and the coefficient of variation of window periods. Equations show how the shadow increases with the …

Investigating Urban Sprawl Using Remote Sensing And Gis Technology, Przemysław Kupidura

Przemysław Kupidura

The paper concerns the analysis of urban sprawl. The presented example of Lomianki – the municipality situated in the neighbourhood of Warsaw – capital city of Poland, shows dynamic changes of rural-urban fringe, called sub-urbanization. This kind of process is characterized by incoherence of spatial structure, disproportions between development of built-up areas and transport network, underdevelopment of service built-up areas and public spaces and mixing of urban and rural structures. Such a dynamic development leads also to an increasing of area of sealed (impermeable) zones, what is very important due to water economics. The multi-temporal dataset of aerial and satellite …

Using Twitter Hash Tags To Demonstrate Basic Concepts From Network Analysis, Matt Bogard

Matt Bogard

Social Network Analysis focuses on finding patterns in interactions between people or entities. These patterns may be described in the form of a network. Network analysis in general has many applications including models of student integration and persistence, business to business supply chains, terrorist cells, or analysis of social media such as Facebook and Twitter. This presentation provides a reference for basic concepts from social network analysis with examples using tweets from Twitter.

The Journey To Safety: Conflict-Driven Migration Flows In Colombia, Gianfranco Piras, Nancy Lozano-Gracia, Geoffrey Hewings, Ana Maria Ibanez

Gianfranco Piras

No abstract provided.

Bent-Core Liquid Crystal Elastomers, Rafael Verduzco, Paul Luchette, Seung Ho Hong, John Harden, Elaine Dimasi, Peter Palffy-Muhoray, S. Michael Kilbey Ii, Jim T. Gleeson, Antal Jákli

Antal Jakli

Liquid crystal (LC) elastomers with bent-core side-groups incorporate the properties of bent-core liquid crystals in a flexible and self-supporting polymer network. Bent-core liquid crystal elastomers (BCEs) with uniform alignment were prepared by attaching a reactive bent-core LC to poly(hydrogenmethylsiloxane) and crosslinking with a divinyl crosslinker. Phase behavior studies indicate a nematic phase over a wide temperature range that approaches room temperature, and thermoelastic measurements show that these BCEs can reversibly change their length by more than a factor of two upon heating and cooling. Small-angle X-ray scattering studies reveal multiple, broad low-angle peaks consistent with short-range smectic C order of …

Integrating Software Assurance Into The Software Development Life Cycle (Sdlc), Maurice Dawson, Darrell N. Burrell, Emad Rahim, Stephen Brewster

Maurice Dawson

This article examines the integration of secure coding practices into the overall Software Development Life Cycle (SDLC). Also detailed is a proposed methodology for integrating software assurance into the Department of Defense Information Assurance Certification & Accreditation Process (DIACAP). This method for integrating software assurance helps in properly securing the application layer as that is where more than half of the vulnerabilities lie in a system.

Degradation Of Organic Pollutants In Domestic Wastewaters By Concrete Plates Containing Of Photocatalyst Nanoparticles, Masoud Rastegar

Masoud Rastegar

No abstract provided.

The Zeeman Effect In The Sobolev Approximation Ii. Radial Split Monopole Fields And The ‘Heartbeat’ Stokes V Profile., K. G. Gayley, R. Ignace

Richard Ignace

We calculate the circularly polarized Stokes V(λ) profile for emission lines, formed in hot-star winds threaded with a weak radial magnetic field. For simplicity, the field is treated as a split monopole under the assumptions that it has been radially combed by the wind, and rotation is not playing a central role. Invoking the weak-field approximation, we find that the V(λ) profile has a characteristic “heartbeat” shape exhibiting multiple sign inversions, which might be mistaken for noise in the absence of theoretical guidance. We also conclude that there is a tendency for the V(λ) profile to integrate to zero on …

Reverse Engineering For Mobile Systems Forensics With Ares, John Tuttle, Robert J. Walls, Erik G. Learned-Miller, Brian Neil Levine

Erik G Learned-Miller

We present Ares ,areverseengineeringtechniqueforassist- ing in the analysis of data recovered for the investigation of mobile and embedded systems. The focus of investigations into insider activity is most often on the data stored on the insider’s computers and digital devices — call logs, email messaging, calendar entries, text messages, and browser his- tory — rather than on the status of the system’s security. Ares is novel in that it uses a data-driven approach that in- corporates natural language processing techniques to infer the layout of input data that has been created according to some unknown specification. While some other reverse …

Reallocation Of Mesh Points In Fluid Problems Using Back-Propagation Algorithm, Philadelphia University

Philadelphia University, Jordan

No abstract provided.

Development And Evaluation Of A Chemistry Educational Software For Learning Organic Reactions Using Qualitative Reasoning, Rukaini Abdullah

Rukaini Abdullah

In science education, it is believed that students should understand the qualitative principles that govern the subject including the cause-effect relationships in processes before they are immersed in complex problem solving. Traditional educational programs for teaching organic chemistry do not usually explain or justify an observed chemical phenomenon. These programs do not “explain” simply because the results are obtained through chaining the rules or by searching the reaction routes that have been pre-coded in software. This paper discusses the development techniques, simulation results, and student evaluation of a software tool that aimed to help chemistry students learn organic processes through …

Canonical Representation For Approximating Solution Of Fuzzy Polynomial Equations, M. Salehnegad, Saeid Abbasbandy, M. Mosleh, M. Otadi

Saeid Abbasbandy

No abstract provided.

Semiparametric Analysis Of Recurrent Events: Artificial Censoring, Truncation, Pairwise Estimation And Inference, Debashis Ghosh

Debashis Ghosh

The analysis of recurrent failure time data from longitudinal studies can be complicated by the presence of dependent censoring. There has been a substantive literature that has developed based on an artificial censoring device. We explore in this article the connection between this class of methods with truncated data structures. In addition, a new procedure is developed for estimation and inference in a joint model for recurrent events and dependent censoring. Estimation proceeds using a mixed U-statistic based estimating function approach. New resampling-based methods for variance estimation and model checking are also described. The methods are illustrated by application to …