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Articles 143551 - 143580 of 302581

Full-Text Articles in Physical Sciences and Mathematics

Click Stream Data Analysis Using Hadoop, Krishna Chand Reddy Gaddam, Sivakrishna Thumati Apr 2015

Click Stream Data Analysis Using Hadoop, Krishna Chand Reddy Gaddam, Sivakrishna Thumati

All Capstone Projects

The objective of this project is to collect Click Stream data of USA Government websites which is high in volume and velocity, and store it for analysis in a cost effective manner for enhanced insight and decision making. I expect to learn how to process this data in an engineer’s way. I have plenty of tools in my hand like map reduce, pig, streaming and many more. But for a given business case it is very important to know which tools should be used to achieve the objective. In brief this is what I expect to learn.

The Hadoop-ecosystem, State-of-the-art …


E-Exam Engine, Obaid Ahmed, Muthyalamma Gangula, Rakesh Margam Apr 2015

E-Exam Engine, Obaid Ahmed, Muthyalamma Gangula, Rakesh Margam

All Capstone Projects

E-Exam Engine is a web application by which is designed for Educational Institutes like Grad Schools, Colleges, and Private Institutes to conduct logic tests of their students on a regular basis. Design to facilitate administrator and user friendly interface complete and secure information is provided to user scope.

The E-Exam Engine is the process of conducting exam online. This project Provide accurate and flexible manner of conducting exam online. This Project provides more accurate and efficient way to take exam. It also provides flexibility to the user as one can give the exam at home. This is a one of …


Possible Bias In Asset Valuations: An Application Of The Fraud Risk Triangle To Divorce Cases, Jennifer Tomasetti Apr 2015

Possible Bias In Asset Valuations: An Application Of The Fraud Risk Triangle To Divorce Cases, Jennifer Tomasetti

Honors Projects in Accounting

No abstract provided.


Supplier Selection Criteria For Sustainable Supply Chains, Amy Terracciano Apr 2015

Supplier Selection Criteria For Sustainable Supply Chains, Amy Terracciano

Honors Projects in Management

In today’s global business environment, suppliers can have a significant impact on the buyer’s supply chain. Selecting the right supplier can be a critical decision for manufacturers and distributors, and to aid in the supplier selection decision making process a large number of selection criteria have been proposed in the literature. Supplier selection criteria have traditionally focused on metrics that impact the buyer’s costs. But due to increased business awareness of the importance of sustainability, supplier selection criteria have now come to include measures on environmental and social performance. While environmental metrics for supplier selection have received some attention in …


Electron Penetration Range For Diverse Materials, Anne C. Starley, Lisa M. Phillipps, Jr Dennison Apr 2015

Electron Penetration Range For Diverse Materials, Anne C. Starley, Lisa M. Phillipps, Jr Dennison

Posters

The penetration range of energetic electrons into diverse materials can be modeled approximately with a simple fit. This fit is a function of a single parameter, Nv, which describes the effective number of valence electrons. Using the Continuous-Slow-Down-Approximation (CSDA) for energy deposition in a material, a composite analytical formula has been developed which estimates the range or maximum penetration depth of incident electrons for energies from10 MeV with an uncertainty of


Degradation Of Space Polymers: A Case Study, Kelby T. Peterson Apr 2015

Degradation Of Space Polymers: A Case Study, Kelby T. Peterson

Senior Theses and Projects

Materials International Space Station Experiment 6 (MISSE-6) was an experiment designed to examine the consequences of the space environment on various materials used in space-component design. USU’s contribution was comprised of approximately 180 samples that were suspended from the side of the International Space Station (ISS) for 18 months and returned to allow for pre- and post-flight comparisons. The sample with the most evident changes was a thin film of polyethylene terephthalate (PET) MylarTM coated with Vapor Deposited Aluminum (VDA). The post-flight analysis showed evidence of atomic oxygen erosion of the VDA layer, UV-induced discoloration of the polymer, and a …


Active Salt Deformation And Rapid, Transient Incision Along The Colorado River Near Moab, Utah, Andrew P. Jochems, Joel L. Pederson Apr 2015

Active Salt Deformation And Rapid, Transient Incision Along The Colorado River Near Moab, Utah, Andrew P. Jochems, Joel L. Pederson

Geosciences Faculty Publications

In certain settings, erosion is driven by and balanced with tectonic uplift, but the evolution of many landscapes is dominated by other factors such as geologic substrate, drainage history, and transient incision. The Colorado Plateau is an example where these controls are debated and where salt deformation is hypothesized to be locally active and driven by differential unloading, although this is unconfirmed and unquantified in most places. We use luminescence-dated Colorado River terraces upstream of Moab, Utah, to quantify rates of salt-driven subsidence and uplift at the local scale. Active deformation in the study area is also supported by patterns …


Tailoring Optical Complex Fields With Nano-Metallic Surfaces, Guanghao Rui, Qiwen Zhan Apr 2015

Tailoring Optical Complex Fields With Nano-Metallic Surfaces, Guanghao Rui, Qiwen Zhan

Electro-Optics and Photonics Faculty Publications

Recently there is an increasing interest in complex optical fields with spatially inhomogeneous state of polarizations and optical singularities. Novel effects and phenomena have been predicted and observed for light beams with these unconventional states. Nanostructured metallic thin film offers unique opportunities to generate, manipulate and detect these novel fields. Strong interactions between nano-metallic surfaces and complex optical fields enable the development of highly compact and versatile functional devices and systems. In this review, we first briefly summarize the recent developments in complex optical fields. Various nano-metallic surface designs that can produce and manipulate complex optical fields with tailored characteristics …


Crystal Structure Of 9-Methacryloylanthracene, Aditya Agrahari, Patrick O. Wagers, Steven M. Schildcrout, John Masnovi, Wiley J. Youngs Apr 2015

Crystal Structure Of 9-Methacryloylanthracene, Aditya Agrahari, Patrick O. Wagers, Steven M. Schildcrout, John Masnovi, Wiley J. Youngs

Chemistry Faculty Publications

In the title compound, C18H14O, with systematic name 1-(anthracen-9-yl)-2-methylprop-2-en-1-one, the ketonic C atom lies 0.2030 (16) angstrom out of the anthrylring-system plane. The dihedral angle between the planes of the anthryl and methacryloyl moieties is 88.30 (3)degrees and the stereochemistry about the Csp(2) - Csp(2) bond in the side chain is transoid. In the crystal, the end rings of the anthryl units in adjacent molecules associate in parallel-planar orientations [shortest centroid-centroid distance = 3.6320 (7) angstrom]. A weak hydrogen bond is observed between an aromatic H atom and the O atom of a molecule displaced by translation in the a-axis …


Mathematical Explorations Of Card Tricks, Timothy R. Weeks Apr 2015

Mathematical Explorations Of Card Tricks, Timothy R. Weeks

Senior Honors Projects

In this project, we explore various mathematical topics as they apply to an assortment of card tricks. We will focus on an examination of theorems applied to the manipulation of cards in an attempt to prove why certain card tricks work. These theorems utilize abstract algebra, probability, number theory, and combinatorics. Many tricks can be explained this way, instead of singularly by sleight of hand or other “magical” methods. We will rigorously prove the theorems and principles that explain these concepts, focusing primarily on the card tricks and examples presented in Mathematical Card Magic by Colm Mulcahy (2013).


Social Services Management Solution, Kurt A. Karner, James L. Potulny Apr 2015

Social Services Management Solution, Kurt A. Karner, James L. Potulny

All Capstone Projects

The modern privately run social services agency exists within a complex regulatory framework that requires detailed recordkeeping. In such an environment, paperwork tracking is best managed by a centralized enterprise data management system. While commercial applications that perform this function exist, they are frequently bundled with software for other business functions. Such additional software can be helpful, but it frequently duplicates the functionality of other enterprise software for these businesses, which is financially inefficient. This project developed a similar system using the ASP.NET 4.5 framework that is designed to provide a standalone solution to recordkeeping requirements. It followed a typical …


A Diastereoselective Approach To Bis-Spiroketal Synthesis Using Sulfinyl Iron(0) Tricarbonyl Diene Complexes, Peter A. Amadeo , '15 Apr 2015

A Diastereoselective Approach To Bis-Spiroketal Synthesis Using Sulfinyl Iron(0) Tricarbonyl Diene Complexes, Peter A. Amadeo , '15

Senior Theses, Projects, and Awards

In the past, Paley lab has focused on the diastereoselective synthesis of spiroketals using sulfinyl iron(0) tricarbonyl diene complexes. This research has extended to study the formation of bis-spiroketals. As valuable natural products, bis-spiroketals are important synthesis targets, and the stereochemistry at the anomeric carbons is especially important. This research focuses on how sulfinyl iron(0) tricarbonyl diene complexes can help control the stereoselectivity of bis-spiroketal formation. The first attempt to make the desired bis-spiroketal involved preparmg a dihydroxy diketone precursor, which would undergo dehydrative cyclization. Unfortunately, there were various obstacles to preparing the precursor. Attempts to oxidize double bonds, remove …


Development Of Extraction Methods For The Determination Of Epoxiconazole And Myclobutanil In Agar Media By Hplc, Martin T. Mathay , '15 Apr 2015

Development Of Extraction Methods For The Determination Of Epoxiconazole And Myclobutanil In Agar Media By Hplc, Martin T. Mathay , '15

Senior Theses, Projects, and Awards

Triazole fungicides represent the largest class within sterol demethylation inhibitors. While their intended use is to kill fungi, their accumulation to large concentrations is detrimental to non-targeted species. The primary goal of this work was to develop and optimise a method to quantify the amount of triazole fungicides from solid agar media. This investigation is divided into three parts: a method validation dedicated to authenticate the trueness of an HLPC method used in the determination and quantification of the triazole fungicides epoxiconazole and myclobutanil and two sections dedicated to utilizing the HPLC method to evaluate the efficiency of developed extraction …


Betti Sequences Over Local Rings And Connected Sums Of Gorenstein Rings, Zheng Yang Apr 2015

Betti Sequences Over Local Rings And Connected Sums Of Gorenstein Rings, Zheng Yang

Department of Mathematics: Dissertations, Theses, and Student Research

This thesis consists of two parts:

1) Polynomial growth of Betti sequences over local rings (Chapter 2),

2) Connected sums of Gorenstein rings (Chapter 3).

Chapter 1 gives an introduction for the two topics discussed in this thesis.

The first part of the thesis deals with modules over complete intersections using free resolutions. The asymptotic patterns of the Betti sequences of the finitely generated modules over a local ring R reflect and affect the singularity of R. Given a commutative noetherian local ring and an integer c, sufficient conditions and necessary conditions are obtained for all Betti sequences …


Characterization Of Boron Hydride Compounds For Potential Use In Pressurized Water Nuclear Reactors, Alex Blake Apr 2015

Characterization Of Boron Hydride Compounds For Potential Use In Pressurized Water Nuclear Reactors, Alex Blake

Electronic Theses & Dissertations

The isotope 10B is a good neutron absorber with a thermal neutron absorption cross section of ~3800 barns. This quality has led to the use of boron as a neutron absorber in the nuclear power industry. In current practice, boric acid is commonly used as a neutron absorber in the water regime of active and passive safety systems. The boron hydride compounds in this study, namely Li2B10H10, Na2B10H10, K2B10H10, Li2B12H12, Na2B12H12, and K2B12H12, have been studied to assess their performance in situations where criticality control needs exceed normal control methods. In this type of situation these compounds have several advantages …


Mathematical Modeling Of The Imported Malaria In The United Arab Emirates, Fatima Hassan Ali Alawadhi Apr 2015

Mathematical Modeling Of The Imported Malaria In The United Arab Emirates, Fatima Hassan Ali Alawadhi

Theses

Although the UAE was certified to be free of local malaria transmission cases in 2007, the increased number of imported malaria cases in recent years required the attention of the public health professionals. The aim of this work is to study, via mathematical modeling, the impact of imported malaria cases on the population of the UAE. The nature of the health policies in the UAE imposes on us a model that classifies the living population of the UAE in two categories. The local population, who represent the permanent residents that do not have any health requirement for their residency, and …


Existence And Uniqueness Of Solutions For A Class Of Non-Linear Boundary Value Problems Of Fractional Order, Arwa Abdulla Omar Salem Ba Abdulla Apr 2015

Existence And Uniqueness Of Solutions For A Class Of Non-Linear Boundary Value Problems Of Fractional Order, Arwa Abdulla Omar Salem Ba Abdulla

Theses

In this thesis, we extend the maximum principle and the method of upper and lower solutions to study a class of nonlinear fractional boundary value problems with the Caputo fractional derivative 1


Restricted Sum Formula Of Alternating Euler Sums, Jianqiang Zhao Apr 2015

Restricted Sum Formula Of Alternating Euler Sums, Jianqiang Zhao

Department of Mathematical Sciences Faculty Publications

In this paper, we study restricted sum formulas involving alternating Euler sums which are defined by ζ(s1,…,sd;ε1,…,εd)=∑n1>⋯>nd≥1εn11⋯εnddns11⋯nsdd,

for all positive integers s 1,…,s d and ε 1=±1,…,ε d =±1 with (s 1,ε 1)≠(1,1). We call w=s 1+⋯+s d the weight and d the depth. When ε j =−1 we say the jth component is alternating. We first consider Euler sums of the following special type: ξ(2s1,…,2sd)=ζ(2s1,…,2sd;(−1)s1,…,(−1)sd).

For dn, let Ξ(2n,d) be the sum of all ξ(2s 1,…,2s d ) …


Active Tile Self-Assembly And Simulations Of Computational Systems, Daria Karpenko Apr 2015

Active Tile Self-Assembly And Simulations Of Computational Systems, Daria Karpenko

USF Tampa Graduate Theses and Dissertations

Algorithmic self-assembly has been an active area of research at the intersection of computer science, chemistry, and mathematics for almost two decades now, motivated by the natural self-assembly mechanism found in DNA and driven by the desire for precise control of nanoscale material manufacture and for the development of nanocomputing and nanorobotics. At the theoretical core of this research is the Abstract Tile Assembly Model (aTAM), the original abstract model of DNA tile self-assembly. Recent advancements in DNA nanotechnology have been made in developing strand displacement mechanisms that could allow DNA tiles to modify themselves during the assembly process by …


A Corpus For Investigating English-Language Learners' Dialog Behaviors, Nigel Ward, Paola Gallardo Apr 2015

A Corpus For Investigating English-Language Learners' Dialog Behaviors, Nigel Ward, Paola Gallardo

Departmental Technical Reports (CS)

We are interested in developing methods for the semi-automatic discovery of prosodic patterns in dialog and how they differ between languages and among populations. We are starting by examining how the prosody of Spanish-native learners of English differs from that of native speakers. To support this work, we have collected a new corpus of conversations among college students. This includes dialogs between a nonnative speaker of English and a native, dialogs between native speakers of English, and Spanish conversations.


Sometimes, It Is Beneficial To Process Different Types Of Uncertainty Separately, Chrysostomos D. Stylios, Andrzej Pownuk, Vladik Kreinovich Apr 2015

Sometimes, It Is Beneficial To Process Different Types Of Uncertainty Separately, Chrysostomos D. Stylios, Andrzej Pownuk, Vladik Kreinovich

Departmental Technical Reports (CS)

In many practical situations, we make predictions based on the measured and/or estimated values of different physical quantities. The accuracy of these predictions depends on the accuracy of the corresponding measurements and expert estimates. Often, for each quantity, there are several different sources of inaccuracy. Usually, to estimate the prediction accuracy, we first combine, for each input, inaccuracies from different sources into a single expression, and then use these expressions to estimate the prediction accuracy. In this paper, we show that it is often more computationally efficient to process different types of uncertainty separately, i.e., to estimate inaccuracies in the …


Why Big-O And Little-O In Algorithm Complexity: A Pedagogical Remark, Olga Kosheleva, Vladik Kreinovich Apr 2015

Why Big-O And Little-O In Algorithm Complexity: A Pedagogical Remark, Olga Kosheleva, Vladik Kreinovich

Departmental Technical Reports (CS)

In the comparative analysis of different algorithm, O- and o-notions are frequently used. While their use is productive, most textbooks do not provide a convincing student-oriented explanation of why these particular notations are useful in algorithm analysis. In this note, we provide such an explanation.


Boyd Group Electronegativity Influence On The Parr Global Electrophilicity Of Vilsmeier Reagent-Derived Imidates: New Insights Toward Improving Mitsunobu Chemistry, Jeremy M. Carr, Gregory S. Tschumper, A. Paige Lathem Apr 2015

Boyd Group Electronegativity Influence On The Parr Global Electrophilicity Of Vilsmeier Reagent-Derived Imidates: New Insights Toward Improving Mitsunobu Chemistry, Jeremy M. Carr, Gregory S. Tschumper, A. Paige Lathem

Chemistry Faculty Research & Creative Works

Reactivities of 19 methylated imidate analogs were examined using B3LYP and M06-2X DFT methods. The resulting HOMO and LUMO energies of each optimized structure were used to calculate corresponding Parr global electrophilicity (ω) values. When the resulting quantities were compared against Boyd group electronegativity (XG) values, a clear correlation was observed, suggesting that electron-withdrawing effects influence the reactivity of imidates. These findings represent an important first step in developing a novel method toward improving traditional Mitsunobu functionalization reactions.


An Efficient Method For Solving A Discrete Orthogonal Approximation To Fractional Boundary Value Problems, Mwaffag Husein Nahar Sharadga Apr 2015

An Efficient Method For Solving A Discrete Orthogonal Approximation To Fractional Boundary Value Problems, Mwaffag Husein Nahar Sharadga

Theses

In this thesis we developed a numerical method for solving a class of nonlinear fractional boundary value problems using the fractional order Legendre Tau-path following method. Theoretical and numerical analyses are presented. The numerical results showed that this method works properly and efficiently.


The Cosm Newsletter Apr 2015

The Cosm Newsletter

The COSM Newsletter (2008-2018)

  • Laura Regassa, GSTA 2015 Teacher of the Year
  • The Department of Biology receives the Kay T. Reissing Terrestrial Snail Collection
  • Biology Professor Invited to United Nations Meeting in Rome
  • Charles and Sandra Chandler Research Scholarship Program
  • Biology Student Kym Coley
  • Announcing a New Scholarship in Biology
  • Biology Professor coauthors environmental science textbook
  • Biology faculty member makes research presentation in Bali, Indonesia
  • Chemistry students attend NOBCChE Conference
  • Graduate student gives talk at UGA
  • Georgia Southern Scientists Map Wassaw Sound
  • Graduates go to sea
  • Department News
  • Student News
  • Professor Xiao-Jun Wang appointed as Editor
  • Nanotechnology Computational group conducts research
  • Updates from the …


Chemistry And Biochemistry News, Georgia Southern University Apr 2015

Chemistry And Biochemistry News, Georgia Southern University

Department of Chemistry and Biochemistry News (2015-2023)

  • Eagles Fly to Denver for Chemistry Presentations


Using Planar Chiral Iron(0) Tricarbonyl Diene Complexes: A Focus On Azaspirocycles And The Use Of An Oxazolidinone Chiral Auxiliary, Julia S. Murphy , '15 Apr 2015

Using Planar Chiral Iron(0) Tricarbonyl Diene Complexes: A Focus On Azaspirocycles And The Use Of An Oxazolidinone Chiral Auxiliary, Julia S. Murphy , '15

Senior Theses, Projects, and Awards

For many years, the Paley laboratory has developed the use of planar chiral η⁴ iron(O) tricarbonyl complexes for use in directing the central chirality of adjacent centers. This work examines the use of dienes functionalized at C2 with a chiral auxiliary. The functionalization of a stereocontrolled [6,6]-azaspirocycle was taken on to great success. This sequence involved a 2-sulfinyl diene complex. The keystone Grignard addition to the cyclic imine was accomplished to afford a single diastereomer. Ring closing metathesis was used to form the final ring of the azaspirocycle framework. Two more sequences were attempted to form azaspirocycle centers. The first …


Studies On Two Putative Ai-2 Receptors And The Transcriptional Repressor Lsrr, Jason Hua , '15 Apr 2015

Studies On Two Putative Ai-2 Receptors And The Transcriptional Repressor Lsrr, Jason Hua , '15

Senior Theses, Projects, and Awards

A diverse range of Gram-negative and Gram-positive bacteria rely on density-dependent, intercellular communication mediated by small signaling molecules called auto inducers to coordinate synchronous gene expression through a process termed quorum sensing. One family of auto inducers, consisting of spontaneously interconverting derivatives of (4S)-4,S-dihydroxy-2,3-pentanedione (DPD) and collectively referred to as Autoinducer- 2 (AI-2), is recognized in a wide variety of species by one of two canonical receptor proteins: LuxP, exclusive to the genus Vibrio, or an LsrB-like receptor. However, several studies have reported that two predicted ribose-binding proteins (RbsB), from Haemophilus injluenzae and Aggregatibacter actinomycetemcomitans, might behave as …


The John Muir Newsletter, Spring 2015, The John Muir Center Apr 2015

The John Muir Newsletter, Spring 2015, The John Muir Center

Muir Center Newsletters (1981-2015)

SPRING 2015 jJui JMaaaa, JL^aXAXaa, V>P , THE JOHN MUIR CENTER Reflections on John Muir— One-hundred years after his death Bill Swagerty, Co-Director, John Muir Center During 2014, many institutions honored John Muir's legacy with an event associated with the centennial of his death on December 24, 1914. It was also the fiftieth anniversary of passage of the Wilderness Act by Congress in 1964 and the 150th anniversary of the Yosemite Act, transferring the core of what would become Yosemite National Park from the State of California to the federal government. Pacific hosted the 60th California History Institute from …


Parallel Preconditioners For Finite Element Computations, Emily Furst Apr 2015

Parallel Preconditioners For Finite Element Computations, Emily Furst

Honors Theses, 1963-2015

This thesis sought to explore numerical methods for solving partial differential equations and to determine the best method of updating the deal.II software to utilize new Trilinos software packages. The one dimensional heat equation with Dirichlet boundary conditions and nonzero initial conditions was solved analytically, using the Forward in Time, Central in Space scheme of the finite difference method, and the Crank-Nicolson scheme of the finite element method. The solutions from using the finite difference method and the finite element method were then compared to the analytic solution to determine accuracy. An example using the same Trilinos packages that are …