Digital Commons Network^™

Study Of Zone Center Phonons In Wolframite Znwo_4, Ruby Jindal, Murari Mohan Sinha, Hem Chandra Gupta

Turkish Journal of Physics

A short-range force constant model was applied to investigate the phonons in wolframite ZnWO_4 crystals in their monoclinic phase having space group P2/c and symmetry C_{2h}. The normal symmetry coordinates for the monoclinic wolframite were computed. The zone center phonons were calculated by using 8 stretching and 6 bending force constants. The calculated results are in very good agreement with the observed ones. The infrared frequencies were assigned for the first time. The potential energy distribution was also investigated for determining the significance of the contribution from each force constant toward the Raman and infrared wavenumbers.

A Simple Method To Extract The Parameters Of The Single-Diode Model Of A Pv System, Ahmed A. El Tayyan

Turkish Journal of Physics

This article suggests a simple method of modeling and simulation of photovoltaic systems. The main goal is to find the parameters (I_{ph}, I_o, R_s, R_{sh}, and a) of the single-diode model by adjusting the P-V curve and/or I-V curve at parameters provided by the manufacturer specification sheets (I_{sc}, V_{oc}, I_{mp}, and V_{mp}). An empirical model is incorporated into the single-diode model in order to remove its implicit nature and to ease the calculations. Calculations using this method can be extended to generate the I-V curves at temperatures and irradiances other than the standard test condition (STC)

Study Of Solid-State Stability Of The Zoto Binary System, Sandeep A. Waghuley

Turkish Journal of Physics

The ZOTO binary system contains different compositions of zinc oxide (ZnO) and tin oxide (SnO_2). These are important semiconductors and have been intensively explored for various applications. SnO_2, ZnO, and different mole ratios (70:30, 40:60, 30:70, and 20:80 SnO_2:ZnO) of the ZOTO system were prepared through proper thermal treatment in powder form. The comparative solid-state stability was investigated using thermogravimetric and differential thermal analysis (TG-DTA). The stability study showed that the SnO_2 material absorbs much lower heat (Ea = -72.06 kJ/g mol) compared with ZnO and their compositions. Thus the SnO_2 material shows stability at near room temperature operation. The …

Molecular Dynamic Simulation On Iron Corrosion-Reduction In High Temperature Molten Lead-Bismuth Eutectic, Artoto Arkundato, Zaki Su'ud, Mikrajuddin Abdullah, Widayani Sutrisno

Turkish Journal of Physics

Molecular dynamic simulation on iron in high-temperature molten lead-bismuth eutectic has been carried out to investigate the iron corrosion and its mitigation. The aim of the work is to investigate the corrosion and evaluate proper oxygen content of injection for significant and effective reduction. To study the phenomena we calculated the diffusion coefficients, radial distribution functions and mean square displacement of iron, and also observed the micro-structure of iron before and after oxygen injection into coolant. The present calculation shows that a significant and effective reduction of corrosion can be achieved by injection of 7.68 \times 10^{-2}-1.55 \times 10^{-1} wt\% …

Optimization Of Laser Marking With The Help Of Simulation Models, Lyubomir Kostadimov Lazov, Nikolay Angelov Petrov

Turkish Journal of Physics

This article covers the results of several numerical experiments carried out with specific software working under MATLAB for marking of tool steel and electronic elements. CuBr and Nd:YAG lasers were used in this study. Simulations with 3 different durations of pulse of laser radiation were achieved. Numerical calculations were performed with values (for laser sources and technological parameters) based on real experiments.

Quantitative Characterization Of Atmospheric Desert Particles Via Multispectral Lidar Method (Uv To Ir), Using Genetic Algorithms And Compared With Chomette\'S Mode, Samir Zeghbib, Samia Bouzid, Abdelhafid Chaabi

Turkish Journal of Physics

Size distribution of desert aerosols was measured via LiDAR multi-spectral method using laser wavelengths from UV to mid-IR \lambda = 0.193, 0.694, 1.064, 3.370 and 10.60 \mu m, and applying statistical Markov chains and genetic algorithms. Our results are compared later with the well-known Chomette's desert model.

Cover And Contents

Turkish Journal of Physics

No abstract provided.

Improved Hilbert Moment Thermal Qcd Sum Rules For B_S Meson And Stability With Respect To Moment Parameter, Elşen Veli̇, Gülşah Kaya, Arzu Türkan, Eni̇s Yazici

Turkish Journal of Physics

In this paper, we deal with the temperature dependence of the leptonic decay constant and mass of B_s meson in the framework of the Hilbert moment QCD sum rule. In our calculations, we improve the thermal QCD sum rules, taking into account the thermal spectral density and the perturbative 2-loop order corrections to the correlation function. Moreover, we investigate the stability of the results with respect to the Hilbert moment parameter. Our numerical calculations demonstrate that the mass and decay constant are insensitive to the variation of temperature up to T \cong 100 MeV; however, after this value, they start …

Kantowski-Sachs Cosmological Model With Wet Dark Fluid In The General Theory Of Relativity, Arun Ravishankar, Bivudutta Mishra, Pradyumn Kumar Sahoo

Turkish Journal of Physics

The purpose of this study was to investigate the role of wet dark fluid (WDF) in Kantowski-Sachs space-time in the general theory of relativity. In this theory, we solved the field equations for the case where \rho _{WDF}=-2p_{WDF}. Various physical and geometrical properties of the model are also discussed.

The Development Of A Novel Technique To Evaluate The Cr-39 Track Response To Alpha Particles, Khalil Ibrahim Mohammad, Muzahim Ibrahim Azawe

Turkish Journal of Physics

A novel technique is presented for the assessment of the track response of the detector CR-39 to alpha particles by photothermal deflection spectroscopy and image analysis. The 2 new techniques can be implemented to CR-39 as in situ measurements. The proposed techniques offer the possibility of monitoring nuclear radiation directly. Photothermal deflection is described to detect the change in the thermal and optical properties of the track nuclear detector CR-39 when irradiated to alpha particles. In situ image analysis of the photothermal deflection spot is presented to assess the detection of the CR-39 of any nuclear particle or radiation instantaneously.

Analyses Of Elastically Scattered Charged Pions From Calcium Isotopes And The ^{48}Ca-^{54}Fe Isotone At 180 Mev, Zuhair Fayyad Mahmoud Shehadeh

Turkish Journal of Physics

The elastic scattering of 180 MeV positively and negatively charged pions, incident on a set of calcium isotopes and the isotone ^{48}Ca - ^{54}Fe, has been analyzed within the framework of a recently updated simple local optical potential. This potential, particularly at the tail region, has been originally determined from available phase shifts using inverse scattering theory and the Klein--Gordon equation as a guide. The analysis is carried out with and without considering the squared potential term in the Klein-Gordon equation. Coulomb effects are accounted for by implementing Stricker's prescription. The numerical results for the angular distributions with isotopic and …

Evaluation Of Single Electron Transfer Reduction Products Of 3-Oxoindoles As Antibacterial Agents, Debasish Bandyopadhyay, Irani Biswas, Subrata Laskar, Bidyut Basak

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

Objective: The objective of the present study is to assess the antibacterial properties of six indole derivatives viz, 3-(Naphth-1-y - methyl) –indole (II), 3-(1-Naphthylcarbonyl – indole (III), 3,3' –diformyl-2,2' –bis indole (IV), 1,4- (3,3' –di indolyl) – 1,4-dioxobutane (V), 3-benzoyl indole (VI) and 1,1 – bis – (3-indolyl)- ethane (VII) synthesized by single electron transfer reduction of 3-formylindole (I) against two Gram +ve and two Gram –ve bacteria which usually cause human infections.

Methods: Synthesis of 3-formyl indole from which the indole derivatives were prepared were further characterized by IR and NMR analysis. The six synthesized compounds were screened for …

A Mhealth Architecture For Diabetes Self-Management System, Omar F. El-Gayar, Nevine Nawar, Prem Timsina

Research & Publications

Recent advancement in smartphones coupled with the proliferation of data connectivity has resulted in increased interest and unprecedented growth in mobile applications for diabetes self-management. Nevertheless, a review of the literature highlights critical gaps between available functionality and user requirements and expectations. In this paper, we present a mHealth architecture of diabetes self-management system. The architecture has the following functionalities: automated data-entry through the use of wireless sensors; adherence to clinical guidelines; advanced statistical techniques for diabetes modeling and prediction; and advanced charting capabilities for data presentation and quality control. © (2013) by the AIS/ICIS Administrative Office All rights reserved.

Information Security Policy Compliance: An Empirical Study Of Ethical Ideology, Ahmad Al-Omari, Amit Deokar, Omar F. El-Gayar, Jack Walters

Research & Publications

Information security policy compliance (ISP) is one of the key concerns that face organizations today. Although technical and procedural measures help improve information security, there is an increased need to accommodate human, social and organizational factors. Despite the plethora of studies that attempt to identify the factors that motivate compliance behavior or discourage abuse and misuse behaviors, there is a lack of studies that investigate the role of ethical ideology per se in explaining compliance behavior. The purpose of this research is to investigate the role of ethics in explaining Information Security Policy (ISP) compliance. In that regard, a model …

On The Design Of It-Enabled Self-Care Systems: A Socio-Technical Perspective, Omar F. El-Gayar, Surendra Sarnikar, Abdullah Hamdi Saleh Wahbeh

Research & Publications

Advances in information technology (IT) have resulted in a proliferation of IT-based solution to support the self-care and management for healthy individuals as well as patients with chronic conditions. Despite these advances, the adoption and diffusion of these solutions into practice is limited. The objective of this paper is to enhance adoption and diffusion by providing actionable recommendations for the design of IT systems for self-care. The recommendations are grounded in socio-technical design theory and in an extensive review of self-care literature. The findings indicate that despite the diversity of disease conditions, users, technologies, and implementation environments, IT-solutions for self-care …

Mobile Applications For Diabetes Self-Management: Status And Potential, Omar F. El-Gayar, Prem Timsina, Nevine Nawar, Wael Eid

Research & Publications

Background:Advancements in smartphone technology coupled with the proliferation of data connectivity has resulted in increased interest and unprecedented growth in mobile applications for diabetes self-management. The objective of this article is to determine, in a systematic review, whether diabetes applications have been helping patients with type 1 or type 2 diabetes self-manage their condition and to identify issues necessary for large-scale adoption of such interventions.Methods:The review covers commercial applications available on the Apple App Store (as a representative of commercially available applications) and articles published in relevant databases covering a period from January 1995 to August 2012. The review included …

Discovering Predictive Event Sequences In Criminal Careers, Carl A. Janzen, Amit Deokar, Omar F. El-Gayar

Research & Publications

In this work, we consider the problem of predicting criminal behavior, and propose a method for discovering predictive patterns in criminal histories. Quantitative criminal career analysis typically involves clustering individuals according to frequency of a particular event type over time, using cluster membership as a basis for comparison. We demonstrate the effectiveness of hazard pattern mining for the discovery of relationships between different types of events that may occur in criminal careers. Hazard pattern mining is an extension of event sequence mining, with the additional restriction that each event in the pattern is the first subsequent event of the specified …

Use Of Online Tools In Teaching C++ Programming To Freshmen In All Engineering Majors, Grace Ni, David Bishop, Anthony Donaldson

Research & Publications

As computer software becomes increasingly used in analysis and design in all engineering disciplines, more engineering programs have started including computer programming in their common core for all engineering majors. C++ is a popular programming language that’s been chosen for teaching engineering students programming. At California Baptist University, EGR 121 Introduction to Computer Programming in C++ is a required course for all engineering students. Most of our engineering students take this course in their first year. This course was taught using traditional means of lecture, text book reading and exercises along with labs and programming projects. Since the fall of …

Personalization To New Website Users: The Role Of Trust And Culture, Son Bui, William Kettinger, Insu Park

Research & Publications

In ecommerce, many market followers would like to have personalization systems in place to more effectively compete with market leaders. However, retailers face a significant challenge in forming initial trust with new customers, especially when the new customers are culturally diverse. Acknowledging this dilemma, this study examines the moderating cultural effects of espoused individualism/collectivism and uncertainty avoidance on the relationships between four different types of trust, namely, propensity to trust, institutional based trust, cognitive trust, and emotional trust, relative to the intention to use personalization system. Drawing on the theory of reasoned action, we first present different types of trust. …

Towards A Business Intelligence Maturity Model For Healthcare, Patti Brooks, Omar El-Gayar, Surendra Sarnikar

Research & Publications

Healthcare is a very complex, knowledge-driven industry. Electronic health record implementations have created massive amounts of clinical and financial data. The accumulation of data is outpacing the ability of organizations to leverage the data for improving financial and clinical efficiencies and quality of care. It is believed that careful and attentive use of business intelligence (BI) in healthcare can transform data into knowledge that can improve patient outcomes and operational efficiency. BI maturity models are a way of identifying strengths and weaknesses of the information maturity of a business. This paper presents a comprehensive review of existing BI maturity models …

An Approach For Criminal Career Analysis Using Hazard Patterns, Carl A. Janzen, Amit Deokar, Omar F. El-Gayar

Research & Publications

No abstract provided.

Aligning It Assets To Maximize Healthcare Organizational Performance, Paul Weist, Surendra Sarnikar, Omar F. El-Gayar

Research & Publications

This study examines the impact of healthcare information technology assets on organizational efficiency. Using an econometric approach with data envelopment analysis, we examine the effect of IT asset clusters on organizational efficiency as measured relative to a peer group of healthcare organizations We observe that different IT asset clusters have varying effects on organizational efficiency based on the size of the organizations. The results of this study have implications for healthcare organizations in planning their investments across various IT asset clusters.

Model Based Adaptive Control Of Underwater Vehicles For Improved Ocean Science, Christopher J. Mcfarland

Link Foundation Ocean Engineering and Instrumentation Fellowship Reports

Recent advances in unmanned underwater vehicle (UUV) capabilities have enabled oceanographic scientists to consider addressing research topics previously thought impractical or impossible. One such topic is the validation of high resolution computer models; long term deployments of coordinated UUV survey teams have been proposed to collect the density of measurements required. Another topic is the study of biological diversity in volatile areas; UUV intervention/sampling deployments have been proposed because of the inherent risks. In general, providing a high density of high accuracy measurements requires passing many targets as quickly and closely as possible. Similarly, efficacy for intervention/sampling deployments requires agile …

Evaluating And Training Intraoperative Analysis Of The Mitral Valve, Neil A. Tenenholtz

Link Foundation Modeling, Simulation and Training Fellowship Reports

Mitral valve repair is the recommended method of treating valve incompetency. However, the procedure is quite difficult and, as a result, underperformed due to surgeon’s need to predict the closed valve shape of the patient’s arrested heart. While the interactive process of predicting closed valve shape is achieved by physically manipulating valve tissue (known as valve analysis), surgical training consists of traditional, non-interactive pedagogy (e.g., book-based learning and lectures) followed by an apprenticeship model where the trainee is gradually given hands-on experience, resulting in post-medical school training that is often 10 years or greater. The continuing education of practicing cardiac …

Predicting Underwater Radiated Noise From Offshore Impact Pile Driving, Huikwan Kim

Link Foundation Ocean Engineering and Instrumentation Fellowship Reports

Offshore wind turbines have been installed throughout Europe and are expected to be built in the United States water shortly. Offshore wind is an attractive option because 53% of the nation’s population lives in coastal area where energy cost and demands are high. Offshore winds tend to blow harder and more uniformly than on land [1]. However, structure borne noise and vibration generated by offshore impact pile driving radiate into and propagate through the air, water, and sediment media. The objective of this project is quantitatively predicting noise level around the piling location at sea to estimate the effects of …

The Benefits Of Mindfulness For Litigators, Jan L. Jacobowitz

Articles

No abstract provided.

The Molecular Basis Of Antibody Mediated Neutralization Of Hepatitis C Virus, Michelle Catherine Sabo

All Theses and Dissertations (ETDs)

Hepatitis C virus: HCV) is positive strand, blood-borne, hepatotropic RNA virus that causes chronic infection in ~170 million people worldwide and is the leading cause of liver transplantation in the United States. HCV entry and attachment is mediated by the envelope protein E2 through interaction with several cellular receptors including CD81, scavenger receptor B1: SRB-1), claudin-1, and occludin, although the exact mechanism by which these receptors facilitate infection remains unclear, largely due to the absence of a structural model of E2. The production of neutralizing antibodies against E2 is thought to be important for controlling HCV infection, likely by blocking …

U.S. Global Aids Funding And Its Discontents: Why The Supreme Court Must Strike Down The Anti-Prostitution Pledge, Chi Adanna Mgbako

Faculty Scholarship

This op-ed recommends that the U.S. Supreme Court strike down the "anti-prostitution pledge," a Congressional requirement forcing organizations receiving U.S. global AIDS funding to adopt policies "opposing prostitution and sex trafficking."

We Shall: Photographs By Paul D'Amato, Gregory J. Harris, Paul D'Amato, Cleophus J. Lee, Louise Lincoln

DePaul Art Museum Publications

No abstract provided.

Article-Based Publishing: Why Pay Once When You Can Pay Twice?, Michelle Price, Micquel Little

Lavery Library Faculty/Staff Publications

The phrase “Epub ahead of print” is very familiar to PubMed users. This tag denotes a separation in the access schedule of a journal issue. It is stated in the PubMed FAQ that “Publishers may submit citations for articles that appear on the web in advance of the journal issue's release,” and those articles are tagged with “Epub ahead of print.” This used to lead users to a publisher’s website to access a pay-per view option or savvy users would try Interlibrary loan. It was in October of 2010 that Elsevier announced it would launch Article-Based Publishing (ABP). How exactly …