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Kennesaw State University

2013

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Articles 1 - 26 of 26

Full-Text Articles in Physical Sciences and Mathematics

Students' Perceived Utility Of Precision Taught Calculus, Rebecca-Anne Dibbs, David Glassmeyer, Wafa Yacoub Dec 2013

Students' Perceived Utility Of Precision Taught Calculus, Rebecca-Anne Dibbs, David Glassmeyer, Wafa Yacoub

Faculty and Research Publications

The last decade of calculus research has showed students learn best when lecture is supplemented with thoughtful use of technology and group work; however, educators are given little direction of how they are to balance the already full first semester calculus class. Precision teaching is an instructional model that employs formative assessment to provide information on what topics are understood by students as well as indicate troublesome concepts. With this information, the instructor can adjust class time accordingly by incorporating supplemental activities most beneficial to students. The purpose of this interview study was to explore the perceived utility of precision …

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Top Quark Production, Nikolaos Kidonakis Nov 2013

Top Quark Production, Nikolaos Kidonakis

Faculty and Research Publications

I discuss top quark production in hadronic collisions. I present the soft-gluon resummation formalism and its derivation from factorization and renormalization-group evolution, and two-loop calculations of soft anomalous dimensions in the eikonal approximation. I discuss the contributions of next-to-next-to-leading order (NNLO) soft-gluon corrections to the total cross sections and top-quark transverse momentum and rapidity distributions for top-antitop pair production, and for single-top production in the t and s channels and in association with a W boson or a charged Higgs boson.

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Top Quark Working Group Report, Nikolaos Kidonakis, Et. Al. Nov 2013

Top Quark Working Group Report, Nikolaos Kidonakis, Et. Al.

Faculty and Research Publications

The top quark was discovered in 1995 [1, 2] and it is still the heaviest elementary particle known today. Thanks to its large mass, and the related strength of its coupling to the Higgs boson, the top quark may be a key player in understanding the details of electroweak symmetry breaking. Studies of the top quark properties at the Tevatron and Run I of the LHC have given us a detailed understanding of many properties of this particle, including its mass, production and decay mechanisms, electric charge and more. With the exception of the large forward-backward asymmetry in tt¯ production …

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Genetic Algorithm Based Model In Text Steganography, Christine K. Mulunda, Peter W. Wagacha, Alfayo O. Adede Oct 2013

Genetic Algorithm Based Model In Text Steganography, Christine K. Mulunda, Peter W. Wagacha, Alfayo O. Adede

The African Journal of Information Systems

Steganography is an ancient art. It is used for security in open systems. It focuses on hiding secret messages inside a cover medium. The most important property of a cover medium is the amount of data that can be stored inside it without changing its noticeable properties. There are many sophisticated techniques with which to hide, analyze, and recover that hidden information. This paper discusses an exploration in the use of Genetic Algorithm operators on the cover medium. We worked with text as the cover medium with the aim of increasing robustness and capacity of hidden data. Elitism is used …

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Fcnc Top Quark Production Via Anomalous Couplings, Nikolaos Kidonakis, Elwin Martin Oct 2013

Fcnc Top Quark Production Via Anomalous Couplings, Nikolaos Kidonakis, Elwin Martin

Faculty and Research Publications

We calculate flavor-changing neutral current (FCNC) processes with top-quark production via anomalous couplings at LHC energies. We report on progress on the FCNC processes gu -> tZ, gu -> t gamma and gu -> tg. We go beyond leading order and include soft-gluon corrections through next-to-next-to-leading order.

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Protein Similarity Networks Reveal Relationships Among Sequence, Structure, And Function Within The Cupin Superfamily, Richard Uberto, Ellen W. Moomaw Sep 2013

Protein Similarity Networks Reveal Relationships Among Sequence, Structure, And Function Within The Cupin Superfamily, Richard Uberto, Ellen W. Moomaw

Faculty and Research Publications

The cupin superfamily is extremely diverse and includes catalytically inactive seed storage proteins, sugar-binding metal-independent epimerases, and metal-dependent enzymes possessing dioxygenase, decarboxylase, and other activities. Although numerous proteins of this superfamily have been structurally characterized, the functions of many of them have not been experimentally determined. We report the first use of protein similarity networks (PSNs) to visualize trends of sequence and structure in order to make functional inferences in this remarkably diverse superfamily. PSNs provide a way to visualize relatedness of structure and sequence among a given set of proteins. Structure- and sequence-based clustering of cupin members reflects functional …

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Soft-Gluon Resummations And Nnnlo Expansions, Nikolaos Kidonakis Sep 2013

Soft-Gluon Resummations And Nnnlo Expansions, Nikolaos Kidonakis

Faculty and Research Publications

I discuss the effectiveness of soft-gluon resummations in describing higher-order corrections. I present a comparison of recent resummation approaches and their relative successes in approximating complete NNLO corrections. I also discuss fixed-order expansions through NNNLO and present some recent applications to QCD hard-scattering processes, including top-antitop pair production, single-top production, and W production at large transverse momentum.

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Studies Of Highly-Boosted Top Quarks Near The Tev Scale Using Jet Masses At The Lhc, B. Auerbach, S. V. Chekanov, Nikolaos Kidonakis Sep 2013

Studies Of Highly-Boosted Top Quarks Near The Tev Scale Using Jet Masses At The Lhc, B. Auerbach, S. V. Chekanov, Nikolaos Kidonakis

Faculty and Research Publications

Studies of highly-boosted top quarks produced inclusively in pp collisions at √ s = 14 TeV are discussed. Using Monte Carlo models after a fast detector simulation, it is shown that jet masses alone provide a sensitive probe for top quarks produced inside highp T jets. The hadronic decays of such top quarks can be studied in a data-driven approach by analysing shapes of jet-mass distributions. It is shown that inclusive production of boosted top quarks can be observed if it has a cross section at least twice larger than the prediction from the approximate next-to-next-to-leading-order (aNNLO) calculation for the …

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Shadows In Time: A Study Of Temporal Metaphysics Through Hard Science Fiction And Its Restrictions On The Past And Future, Lindsey E. Mitchell Aug 2013

Shadows In Time: A Study Of Temporal Metaphysics Through Hard Science Fiction And Its Restrictions On The Past And Future, Lindsey E. Mitchell

Oglethorpe Journal of Undergraduate Research

Through a series of essays, this body of work explores the varying theories concerning the nature of time and how each theory affects the possibility and outcome of time travel. Following these essays, a collection of short stories focuses on what the author considers the most probable theories concerning time and expands on how they might affect a time traveler's decisions and fate.

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Simultaneous Approximation Of A Multivariate Function And Its Derivatives By Multilinear Splines, Ryan Anderson, Yuliya Babenko, Tetiana Leskevych Aug 2013

Simultaneous Approximation Of A Multivariate Function And Its Derivatives By Multilinear Splines, Ryan Anderson, Yuliya Babenko, Tetiana Leskevych

Faculty and Research Publications

In this paper we consider the approximation of a function by its interpolating multilinear spline and the approximation of its derivatives by the derivatives of the corresponding spline. We obtain the exact uniform approximation error on classes of functions with moduli of continuity bounded above by certain majorants.

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Top-Quark Transverse-Momentum Distributions In T-Channel Single-Top Production, Nikolaos Kidonakis Aug 2013

Top-Quark Transverse-Momentum Distributions In T-Channel Single-Top Production, Nikolaos Kidonakis

Faculty and Research Publications

I present approximate next-to-next-to-leading-order (NNLO) top-quark transverse momentum, pT , distributions in t-channel single-top production. These distributions are derived from next-to-next-to-leading-logarithm (NNLL) soft-gluon resummation. Theoretical results for the single top as well as the single antitop pT distributions are shown for LHC and Tevatron energies.

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Top Quark Transverse Momentum And Rapidity Distributions, Nikolaos Kidonakis Aug 2013

Top Quark Transverse Momentum And Rapidity Distributions, Nikolaos Kidonakis

Faculty and Research Publications

I present NNLO approximate calculations, based on NNLL resummation, for top quark differential transverse momentum and rapidity distributions. In particular recent results are presented for top-pair production and single-top production processes and compared to the latest experimental data from the LHC.

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The Jet-Disk Connection: Evidence For A Reinterpretation In Radio-Loud And Radio-Quiet Active Galactic Nuclei, David Garofalo Jul 2013

The Jet-Disk Connection: Evidence For A Reinterpretation In Radio-Loud And Radio-Quiet Active Galactic Nuclei, David Garofalo

Faculty and Research Publications

To constrain models of the jet-disc connection, we explore Eddington ratios reported in Foschini (2011) and interpret them in relation to the values in Sikora et al. across the active galactic nuclei population from radio loud quasars, their flat spectrum radio quasar subclass, the recently discovered gamma-ray loud narrow-line type 1 Seyfert galaxies, Fanaroff-Riley type I (FRI) radio galaxies and radio quiet quasars of the Palomar Green survey. While appeal to disc truncation in radiatively inefficient flow appears to explain the observed inverse relation between radio loudness and Eddington ratio in radio loud and radio quiet quasars, FR I objects, …

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Substance Abuse Via Legally Prescribed Drugs: The Case Of Vicodin In The United States, Wendy K. Caldwell, Benjamin Freedman, Luke Settles, Michael M. Thomas, Anarina Murillo, Erika Camacho, Stephen Wirkus Jul 2013

Substance Abuse Via Legally Prescribed Drugs: The Case Of Vicodin In The United States, Wendy K. Caldwell, Benjamin Freedman, Luke Settles, Michael M. Thomas, Anarina Murillo, Erika Camacho, Stephen Wirkus

Faculty and Research Publications

Vicodin is the most commonly prescribed pain reliever in the United States. Research indicates that there are two million people who are currently abusing Vicodin, and the majority of those who abuse Vicodin were initially exposed to it via prescription. Our goal is to determine the most effective strategies for reducing the overall population of Vicodin abusers. More specifically, we focus on whether prevention methods aimed at educating doctors and patients on the potential for drug abuse or treatment methods implemented after a person abuses Vicodin will have a greater overall impact. We consider one linear and two non-linear compartmental …

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Student Interaction With Content In Online And Hybrid Courses: Leading Horses To The Proverbial Water, Meg Murray, Jorge Perez, Debra Geist, Alison Hedrick Jul 2013

Student Interaction With Content In Online And Hybrid Courses: Leading Horses To The Proverbial Water, Meg Murray, Jorge Perez, Debra Geist, Alison Hedrick

Faculty and Research Publications

Permutations of traditional and online learning are rapidly advancing along a blended continuum, prompting conjecture that learning and e-learning will soon be indistinguishable. As variations of blended learning evolve, educators worldwide must develop better understanding of how effective interaction with course content impacts engagement and learning. This study compares patterns of access to instructional content in online and hybrid courses offered at a regional university in the United States. Frequency counts and access rates were examined for course content in four categories: core materials, direct support, indirect support, and ancillary materials. Observed results were echoed in responses to a survey …

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Why I Am Not A Materialist, John Cramer Dr. May 2013

Why I Am Not A Materialist, John Cramer Dr.

Oglethorpe Journal of Undergraduate Research

Materialism is a world view that insists the world is nothing but matter. My purpose here is to show it is not a viable world view. Its monism creates severe difficulties for it, centered on the nature of the human mind and the truth of beliefs. Nor is it fit for human consumption because it denies human uniqueness and denigrates human needs.

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2013 - The Eighteenth Annual Symposium Of Student Scholars Apr 2013

2013 - The Eighteenth Annual Symposium Of Student Scholars

Symposium of Student Scholars Program Books

The full program book from the Eighteenth Annual Symposium of Student Scholars, held on April 25, 2013. Includes abstracts from the presentations and posters.

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Hybrid Spread-Spectrum Tcp For Combating Fraudulent Cyber Activities Against Reconnaissance Attacks, Simon Enoch Yusuf, Olumide Longe Apr 2013

Hybrid Spread-Spectrum Tcp For Combating Fraudulent Cyber Activities Against Reconnaissance Attacks, Simon Enoch Yusuf, Olumide Longe

The African Journal of Information Systems

The inefficiencies of current intrusion detection system against fraudulent cyber activities attracts the attention of computer gurus, also known as “hackers” to exploit known weakness on a particular host or network. These hackers are expert programmers who mainly focus on how the Internet works, and they interact with each other to know its strengths and weaknesses. Then they develop advanced tools which an average attacker with little background can use to know the liveness, reachability and running service on the network. Once an attacker identifies these details, he can accurately launch an effective attack and get maximum benefit out of …

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Facile Synthesis Of Silver Nanoparticles Stabilized By Cationic Polynorbornenes And Their Catalytic Activity In 4-Nitrophenol Reduction, Bharat Baruah, Gregory J. Gabriel, Michelle J. Akbashev, Matthew E. Booher Apr 2013

Facile Synthesis Of Silver Nanoparticles Stabilized By Cationic Polynorbornenes And Their Catalytic Activity In 4-Nitrophenol Reduction, Bharat Baruah, Gregory J. Gabriel, Michelle J. Akbashev, Matthew E. Booher

Faculty and Research Publications

We report the facile one-pot single-phase syntheses of silver nanoparticles stabilized by norbornene type cationic polymers. Silver nanoparticles (AgNPs) stabilized by polyguanidino oxanorbornenes (PG) at 5 and 25 kDa and polyamino oxanorbornenes (PA) at 3 and 15 kDa have been synthesized by the reduction of silver ions with NaBH4 in aqueous solutions at ambient temperature. The four different silver nanoparticles have been characterized by UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and transmission electron microscopy (TEM) for their particle size distributions. Interestingly, PG stabilizes the silver nanoparticles better than PA as evident from our spectroscopic data. …

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Theoretical Results For Top Quark Production, Nikolaos Kidonakis Apr 2013

Theoretical Results For Top Quark Production, Nikolaos Kidonakis

Faculty and Research Publications

I discuss and compare several approaches to higher-order calculations of top quark production. I study the relative effectiveness of the approaches in approximating the exact NNLO results for the top-pair total cross section and highlight the theoretical and numerical differences between them. I show that the results from my soft-gluon resummation method are nearly identical to the exact NNLO cross section at all LHC and Tevatron energies. This agreement has important consequences for the validity of existing approximate NNLO differential distributions, for further refinements of the predictions, and for applications to other processes such as single-top production. I also compare …

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A Data Generating Review That Bops, Twists And Pulls At Misconceptions, Kimberly Gardner Apr 2013

A Data Generating Review That Bops, Twists And Pulls At Misconceptions, Kimberly Gardner

Faculty and Research Publications

Statistics is an integral part of the K-12 mathematics curriculum (age 5-18). Naturally, students construct misconceptions of what they learn. This article discusses The Bop It© Challenge, a review activity assesses student understanding and reveals their misundertandings of statistical concepts.

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On The Lack Of Stratospheric Dynamical Variability In Low‐Top Versions Of The Cmip5 Models, Andrew J. Charlton-Perez, Mark P. Baldwin, Thomas Birner, Robert X. Black, Amy H. Butler, Natalia Calvo, Nicholas A. Davis, Edwin P. Gerber, Nathan Gillett, Steven Hardiman, Junsu Kim, Kirsten Krüger, Yun-Young Lee, Elisa Manzini, Brent A. Mcdaniel, Lorenzo Polvani, Thomas Reichler, Tiffany A. Shaw, Michael Sigmond, Seok-Woo Son, Matthew Toohey, Laura Wilcox, Shigeo Yoden, Bo Christiansen, François Lott, Drew Shindell, Seiji Yukimoto, Shingo Watanabe Mar 2013

On The Lack Of Stratospheric Dynamical Variability In Low‐Top Versions Of The Cmip5 Models, Andrew J. Charlton-Perez, Mark P. Baldwin, Thomas Birner, Robert X. Black, Amy H. Butler, Natalia Calvo, Nicholas A. Davis, Edwin P. Gerber, Nathan Gillett, Steven Hardiman, Junsu Kim, Kirsten Krüger, Yun-Young Lee, Elisa Manzini, Brent A. Mcdaniel, Lorenzo Polvani, Thomas Reichler, Tiffany A. Shaw, Michael Sigmond, Seok-Woo Son, Matthew Toohey, Laura Wilcox, Shigeo Yoden, Bo Christiansen, François Lott, Drew Shindell, Seiji Yukimoto, Shingo Watanabe

Faculty and Research Publications

We describe the main differences in simulations of stratospheric climate and variability by models within the fifth Coupled Model Intercomparison Project (CMIP5) that have a model top above the stratopause and relatively fine stratospheric vertical resolution (high-top), and those that have a model top below the stratopause (low-top). Although the simulation of mean stratospheric climate by the two model ensembles is similar, the low-top model ensemble has very weak stratospheric variability on daily and interannual time scales. The frequency of major sudden stratospheric warming events is strongly underestimated by the low-top models with less than half the frequency of events …

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On The Lp-Error Of Approximation Of Bivariate Functions By Harmonic Splines, Yuliya Babenko, Tatyana Leskevich Mar 2013

On The Lp-Error Of Approximation Of Bivariate Functions By Harmonic Splines, Yuliya Babenko, Tatyana Leskevich

Faculty and Research Publications

Interpolation by various types of splines is the standard procedure in many applications. In this paper we discuss harmonic spline “interpolation” (on the lines of a grid) as an alternative to polynomial spline interpolation (at vertices of a grid). We will discuss some advantages and drawbacks of this approach and present the asymptotics of the Lp-error for adaptive approximation by harmonic splines.

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Kinetic And Spectroscopic Studies Of Bicupin Oxalate Oxidase And Putative Active Site Mutants, Ellen W. Moomaw, Eric Hoffer, Patricia Moussatche, John C. Salerno Mar 2013

Kinetic And Spectroscopic Studies Of Bicupin Oxalate Oxidase And Putative Active Site Mutants, Ellen W. Moomaw, Eric Hoffer, Patricia Moussatche, John C. Salerno

Faculty and Research Publications

Ceriporiopsis subvermispora oxalate oxidase (CsOxOx) is the first bicupin enzyme identified that catalyzes manganese-dependent oxidation of oxalate. In previous work, we have shown that the dominant contribution to catalysis comes from the monoprotonated form of oxalate binding to a form of the enzyme in which an active site carboxylic acid residue must be unprotonated. CsOxOx shares greatest sequence homology with bicupin microbial oxalate decarboxylases (OxDC) and the 241-244DASN region of the N-terminal Mn binding domain of CsOxOx is analogous to the lid region of OxDC that has been shown to determine reaction specificity. We have prepared a series of CsOxOx …

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Retrograde Versus Prograde Models Of Accreting Black Holes, David Garofalo Feb 2013

Retrograde Versus Prograde Models Of Accreting Black Holes, David Garofalo

Faculty and Research Publications

There is a general consensus that magnetic fields, accretion disks, and rotating black holes are instrumental in the generation of the most powerful sources of energy in the known universe. Nonetheless, because magnetized accretion onto rotating black holes involves both the complications of nonlinear magnetohydrodynamics that currently cannot fully be treated numerically, and uncertainties about the origin of magnetic fields that at present are part of the input, the space of possible solutions remains less constrained. Consequently, the literature still bears witness to the proliferation of rather different black hole engine models. But the accumulated wealth of observational data is …

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Higher-Order Qcd Corrections For The W-Boson Transverse Momentum Distribution, Nikolaos Kidonakis, Richard J. Gonsalves Jan 2013

Higher-Order Qcd Corrections For The W-Boson Transverse Momentum Distribution, Nikolaos Kidonakis, Richard J. Gonsalves

Faculty and Research Publications

We present results for W-boson production at large transverse momentum at LHC and Tevatron energies. We calculate complete next-to-leading-order (NLO) QCD corrections and higher-order soft-gluon corrections to the differential cross section. The soft-gluon contributions are resummed at next-to-next-to-leading-logarithm (NNLL) accuracy via the two-loop soft anomalous dimensions. Both NLO and approximate next-to-next-toleading-order (NNLO) pT distributions are presented. Our numerical results are in good agreement with recent data from the LHC.

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