Physical Sciences and Mathematics Commons^™

Doping Dependence Of Electronic And Mechanical Properties Of Gase1−XTeX And Ga1−XInXSe From First Principles, Zs. Rak, S. D. Mahanti, K. C. Mandal, N. C. Fernelius

Krishna C. Mandal

No abstract provided.

Terahertz Studies Of The Dielectric Response And Second-Order Phonons In A Gase Crystal, B. L. Yu, F. Zeng, V. Kartazayev, R. R. Alfano, K. C. Mandal

Krishna C. Mandal

No abstract provided.

Characterizations Of Antimony Tri‐Sulfide Chemically Deposited With Silicotungstic Acid, O. Savadogo, K. C. Mandal

Krishna C. Mandal

No abstract provided.

Optical Down-Conversion In Doped Znse:Tb3+ Nanocrystals, Sandip Das, K. C. Mandal

Krishna C. Mandal

No abstract provided.

In Situ Infrared Evidence For The Electrochemical Incorporation Of Hydrogen Into Si And Ge, K. C. Mandal, F. Ozanam, J.-N. Chazalviel

Krishna C. Mandal

No abstract provided.

Investigation Of Cdznte Crystal Defects Using Scanning Probe Microscopy, Goutam Koley, J. Liu, K. C. Mandal

Krishna C. Mandal

No abstract provided.

Novel Chemical Preparative Route For Semiconducting Mose2 Thin Films, K. C. Mandal, O. Savadogo

Krishna C. Mandal

No abstract provided.

Utilizing Remote Sensing Imagery To Monitor Vegetation Change Within World Heritage Sites, Mimi Eve Hatzis

Theses and Dissertations

ABSTRACT

World Heritage sites provide a glimpse into the stories and civilizations of the past. There are currently 1007 unique World Heritage properties with 779 being classified as cultural sites, 197 as natural sites, and 31 falling into the categories of both cultural and natural sites (UNESCO & World Heritage Centre, 1992-2015). However, of these 1007 World Heritage sites, at least 46 are categorized as in danger and this number continues to grow. These unique and irreplaceable sites are exceptional because of their universality. Consequently, since World Heritage sites belong to all the people of the world and provide inspiration …

Collaborative Research: A Nanostructure Sensor For Measuring Dissolved Iron And Copper Concentrations In Coastal And Offshore Seawater, Mark Wells, Carl Tripp

University of Maine Office of Research Administration: Grant Reports

Iron and Copper serve as key co-constituents for numerous enzymes in a wide range of biological systems, and their elevated or impoverished levels in aqueous systems have dramatic consequences at organismal, ecosystem, and human health scales. Over the last decade these effects have increasingly been recognized to be important in ocean systems. Identifying sites and times where these metals cause negative environmental outcomes is greatly hampered by their comparatively sparse datasets. This problem is a direct consequence of the analytical challenge of obtaining accurate Fe and Cu determinations in saline waters at very low (trace) concentrations, and the limitations of …

Robustness Of Spatial Micronetworks, Thomas C. Mcandrew, Christopher M. Danforth, James P. Bagrow

College of Engineering and Mathematical Sciences Faculty Publications

Power lines, roadways, pipelines, and other physical infrastructure are critical to modern society. These structures may be viewed as spatial networks where geographic distances play a role in the functionality and construction cost of links. Traditionally, studies of network robustness have primarily considered the connectedness of large, random networks. Yet for spatial infrastructure, physical distances must also play a role in network robustness. Understanding the robustness of small spatial networks is particularly important with the increasing interest in microgrids, i.e., small-area distributed power grids that are well suited to using renewable energy resources. We study the random failures of links …

Variability Study Of Misaligned Active Galaxies, Sanna Gulati

University Departments

No abstract provided.

Introducing Green Infrastructure: Approaches To Prepare For San Diego's Changing Climate, San Diego Regional Climate Collaborative

San Diego Regional Climate Collaborative

The “Introducing Green Infrastructure: Approaches to Prepare for San Diego’s Changing Climate,” workshop was designed to be an introductory overview of green infrastructure concepts and case studies, and how these approaches can be used to mitigate climate change impacts forecasted for San Diego County. It was also intended to bring together a diverse audience from various sectors and agencies in San Diego County and foster cross-sector dialogue about local practices of green infrastructure approaches, obtaining financing, and who has expertise that can help advance practices in the region.

Big Data And Smart Cities, Amit P. Sheth

Kno.e.sis Publications

No abstract provided.

Cosm News, Georgia Southern University

College of Science and Mathematics News (2012-2019)

• Dr. Rafael Quirino receives Charles H. Herty Fellowship

Odu Students Work On Nation's First Climate Change Adapted Neighborhood, Jugal Patel

News Items

No abstract provided.

Power-Recycled Weak-Value-Based Metrology, Kevin Lyons, Justin Dressel, Andrew N. Jordan, John C. Howell, Paul G. Kwiat

Mathematics, Physics, and Computer Science Faculty Articles and Research

We improve the precision of the interferometric weak-value-based beam deflection measurement by introducing a power recycling mirror, creating a resonant cavity. This results in all the light exiting to the detector with a large deflection, thus eliminating the inefficiency of the rare postselection. The signal-to-noise ratio of the deflection is itself magnified by the weak value. We discuss ways to realize this proposal, using a transverse beam filter and different cavity designs.

A Multiple Resonant Frequencies Circular Reconfigurable Antenna Investigated With Wireless Powering In A Concrete Block, Shishir Shanker Punjala, Nikki Pissinou, Kia Makki

School of Computing and Information Sciences

A novel broadband reconfigurable antenna design that can cover different frequency bands is presented.This antenna has multiple resonant frequencies. The reflection coefficient graphs for this antenna are presented in this paper. The new proposed design was investigated along with RFMEMS switches and the results are also presented. Investigations were carried out to check the efficiency of the antenna in the wireless powering domain. The antenna was placed in a concrete block and its result comparison to that of a dipole antenna is also presented in this paper.

Comprehensive Organic Synthesis Ii (Book Review), Jeffrey H. Glans

Jeffrey H. Glans

Jeffrey Glans' review focuses on the online version available through ScienceDirect. Knochel, Paul and Gary A. Molander, eds. Comprehensive Organic Synthesis II. 2nd ed. Amsterdam; Waltham, MA: Elsevier, 2014. Web. http://www.sciencedirect.com/science/referenceworks/9780080977430 ISBN: 9780080977430 (e-book)

U.S. Drought Monitor, April 28, 2015, Anthony Artusa

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for April 28, 2015 (4/28/15) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Probabilistic Precipitation Estimation With A Satellite Product, Nir Y. Krakauer, Soni M. Pradhanang, Jeeban Panthi, Tarendra Lakhankar, Ajay K. Jha

Publications and Research

Satellite-based precipitation products have been shown to represent precipitation well over Nepal at monthly resolution, compared to ground-based stations. Here, we extend our analysis to the daily and subdaily timescales, which are relevant for mapping the hazards caused by storms as well as drought. We compared the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) 3B42RT product with individual stations and with the gridded APHRODITE product to evaluate its ability to retrieve different precipitation intensities. We find that 3B42RT, which is freely available in near real time, has reasonable correspondence with ground-based precipitation products on a daily timescale; rank …

Deposition And Characteristics Of West Bay Sediment In The Mississippi River Delta, And The Effects Of Polymers On Sediment Erodibility, Patrick Robichaux

Honors Theses

No abstract provided.

Nitrous Oxide And Methane Dynamics In A Coral Reef Lagoon Driven By Pore Water Exchange: Insights From Automated High‐Frequency Observations, Chiara O'Reilly, Isaac R. Santos, Tyler Cyronak, Ashly Mcmahon, Damien T. Maher

Marine & Environmental Sciences Faculty Articles

Automated cavity ring down spectroscopy was used to make continuous measurements of dissolved methane, nitrous oxide, and carbon dioxide in a coral reef lagoon for 2 weeks (Heron Island, Great Barrier Reef). Radon (²²²Rn) was used to trace the influence of tidally driven pore water exchange on greenhouse gas dynamics. Clear tidal variation was observed for CH₄, which correlated to ²²²Rn in lagoon waters. N2O correlated to ²²²Rn during the day only, which appears to be a response to coupled nitrification‐denitrification in oxic sediments, fueled by nitrate derived from bird guano. The lagoon was …

Identification Of Potential Vertical Gas Migration Pathways Above Gas Storage Reservoirs, Eric W. Peterson, Lauren I. Martin, David H. Malone

Faculty Publications-- Geography, Geology, and the Environment

Natural gas is stored underground in geologic structures throughout the United States. However, complexities associated with these geologic structures may provide vertical pathways for gas migration, and thus gas loss. Possible upward migration (loss) of natural gas in an underground gas storage field in Illinois stimulated this investigation that aims to identify potential migration pathways. Spatial analysis of volume of shale (Vsh) and formation porosity (n) values were conducted in conjunction with high-resolution shallow seismic surveys to identify potential vertical pathways. Surficial gas accumulations within glacial deposits were confirmed by the seismic surveys. These gas pockets accumulated by migration along …

Using Independent Bernoulli Random Variables To Model Gender Hiring Practices, Kimberly D. Hildebrand

Student Research Submissions

Gender bias is a problem in the workforce at large. In order for society to progress it is important that hiring practices do not use gender as a competitive factor. Hiring practices based on gender can be represented statistically using Bernoulli Random Variables and the Beta and Binomial distributions.Using the moment generating function (MGF) of the Bernoulli and Binomial Distributions, it is possible to calculate the expected value (mean) and variance for the number of women hires for n positions. The probability generating function (PGF) of a sample size n can be used to find the probability of hiring a …

Preparation And Properties Of Binary Oxides CoXCr1-XO3/2 Electrocatalysts For Oxygen Evolution Reaction, Tai-Lai Yang, Wen-Yan Dong, Hui-Min Yang, Li Zhang, Zhen-Hai Liang

Journal of Electrochemistry

Binary metal mixed oxides of Co and Cr with nominal compositional formulas, Co_xCr_1-xO_3/2 (x=0, 0.2, 0.4, 0.6, 0.8 and 1.0), were obtained by thermal decomposition method. The morphologies, crystal forms and valence states of the catalyst powders were analyzed by SEM, XRD and XPS, respectively. And the electrochemical properties, overpotentials and stabilities of Co_xCr_1-xO_3/2 electrodes for oxygen evolution reaction (OER) in an alkaline solution were evaluated by linear sweep voltammetry (LSV), staircase voltammetry and chronoamperometry, respectively. The results indicated that the mixtures of Co₃O₄ and eskolaite-Cr_{2 …}

Cosm News, Georgia Southern University

College of Science and Mathematics News (2012-2019)

• Dr. Ed Mondor Wins NACADA Award

Measurement Of The Cross Section Ratio Σttbb/Σttjjin Ppcollisions At√S=8tev, Cms Collaboration, Cern Switzerland, Samantha Hewamanage, Stephan Linn, Pete E. Markowitz, German Martinez, Jorge Luis Rodriguez

Department of Physics

The first measurement of the cross section ratio σttbb/σttjjis presented using a data sample corresponding to an integrated luminosity of 19.6fb−1collected in pp collisions at √s=8TeVwith the CMS detector at the LHC. Events with two leptons (eor μ) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum pTof both 20 and 40GeV/c. The measured ratio is 0.022 ±0.003 (stat) ±0.005 (syst)for pT>20GeV/c. The absolute cross sections σttbband σttjjare also measured. The measured ratio for pT>40GeV/cis compatible with a theoretical quantum …

Electrochemical Conversion Reactions And Their Applications For Rechargeable Batteries, Ting Li, Han-Xi Yang

Journal of Electrochemistry

Electrochemical conversion reactions have received considerable interest as a new redox mechanism for constructing high capacity electrodes of rechargeable batteries. Without strict restrictions on the crystalline structure of the host lattice and the size of the associated ions, conversion reactions can take place in a variety of different metal compounds with different metal cations and deliver much higher reversible capacities through full utilization of all the oxidation states of the transition-metal compounds, opening up a new avenue for developing high capacity materials of rechargeable batteries. This paper briefly reviews the state of the art and challenges of conversion electrodes and …

Researches On In-Situ And Ex-Situ Characterization Techniques In Lithium Batteries, Wen-Jun Li, Jie-Yun Zheng, Lin Gu, Hong Li

Journal of Electrochemistry

Electrochemical performance of Lithium batteries is directly linked to interfacial transports, reactions and storing behaviors of electrons and ions at bulk-surface interfaces. It is extremely important to conduct evolution studies from atomic level to macro level in electron structures, crystal structures, microstructures and morphologies, chemical compositions and physical properties of battery materials at equilibrium and nonequilibrium in order to understand various structure-performance relations in lithium ion batteries. Advanced in-situ and ex-situ characterization techniques have been used widely to clarify scientific and technological problems in lithium batteries. This paper summarizes our efforts on battery researches using various experimental techniques, including in …

Electrochemical Performance And Reaction Mechanism Of Li3Fe2(Po4)3/C Cathode Material, Yong Xie, Gui-Ming Zhong, Zheng-Liang Gong, Yong Yang

Journal of Electrochemistry

The cathode material of carbon coated Li₃Fe₂(PO₄)₃ (Li₃Fe₂(PO₄)₃/C) is successfully prepared by sol-gel method and ball-milling carbon coating technique. The cathode material is characterized by XRD, SEM, TEM, and in-situ XAFS techniques. XRD results indicate that the as prepared Li₃Fe₂(PO₄)₃ is of high purity and single phase, and has monoclinic structure with space group of P21/n. Electrochemical measurements show that the carbon-coated material is able to deliver a high initial discharge specific capacity of 128.6 mAh·g^-1 in …