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Articles 1 - 18 of 18
Full-Text Articles in Physical Sciences and Mathematics
A Modular Mind? A Test Using Individual Data From Seven Primate Species, Federica Amici, Bradley Barney, Valen E. Johnson, Josep Call, Filippo Aureli
A Modular Mind? A Test Using Individual Data From Seven Primate Species, Federica Amici, Bradley Barney, Valen E. Johnson, Josep Call, Filippo Aureli
Faculty Articles
It has long been debated whether the mind consists of specialized and independently evolving modules, or whether and to what extent a general factor accounts for the variance in performance across different cognitive domains. In this study, we used a hierarchical Bayesian model to re-analyse individual level data collected on seven primate species (chimpanzees, bonobos, orangutans, gorillas, spider monkeys, brown capuchin monkeys and long-tailed macaques) across 17 tasks within four domains (inhibition, memory, transposition and support). Our modelling approach evidenced the existence of both a domain-specific factor and a species factor, each accounting for the same amount (17%) of the …
Ultrafast Laser-Induced Damage And The Influence Of Spectral Effects, Jeremy R. Gulley
Ultrafast Laser-Induced Damage And The Influence Of Spectral Effects, Jeremy R. Gulley
Faculty Articles
Numerous studies have investigated the prerequisite role of photoionization in ultrafast laser-induced damage (LID) of bulk dielectrics. This study examines the role of spectral width and instantaneous laser frequency in LID using a frequency dependent multiphoton ionization (MPI) model and numerical simulation of initially 800 nm laser pulses propagating through fused silica. Assuming a band gap of 9 eV, MPI by an 800 nm field is a six-photon process, but when the instantaneous wavelength is greater than 827 nm an additional photon is required for photoionization, reducing the probability of the event by many orders of magnitude. Simulation results suggest …
Single Top And Top Pair Production, Nikolaos Kidonakis
Single Top And Top Pair Production, Nikolaos Kidonakis
Faculty Articles
I present results for single-top and top-pair production at the LHC and the Tevatron. Higher-order two-loop corrections are used to achieve NNLL resummation, which is then used to derive NNLO soft-gluon corrections. Results are presented for total cross sections, top transverse momentum distributions, and top rapidity distributions. All results are in excellent agreement with data from the LHC and the Tevatron. I also clarify the differences between various methods in top-pair production and their relation to exact NNLO results.
Nnll Resummation For W-Boson Production At Large Pt, Nikolaos Kidonakis, Richard J. Gonsalves
Nnll Resummation For W-Boson Production At Large Pt, Nikolaos Kidonakis, Richard J. Gonsalves
Faculty Articles
We present new results for W-boson production at large transverse momentum at the LHC and the Tevatron. The contribution of soft-gluon corrections is derived from NNLL resummation and added to the exact NLO result. Numerical results and their uncertainties for the approximate NNLO W-boson transverse momentum distributions are derived and compared to recent data from the LHC.
Hamilton Decompositions Of Certain 6-Regular Cayley Graphs On Abelian Groups With A Cyclic Subgroup Of Index Two, Erik E. Westlund
Hamilton Decompositions Of Certain 6-Regular Cayley Graphs On Abelian Groups With A Cyclic Subgroup Of Index Two, Erik E. Westlund
Faculty Articles
Alspach conjectured that every connected Cayley graph of even valency on a finite Abelian group is Hamilton-decomposable. Using some techniques of Liu, this article shows that if A is an Abelian group of even order with a generating set {a,b}, and A contains a subgroup of index two, generated by c, then the 6-regular Cayley graph is Hamilton-decomposable.
Area Query Processing Based On Gray Code In Wireless Sensor Networks, Chunyu Ai, Yueming Duan, Mingyuan Yan, Jing He
Area Query Processing Based On Gray Code In Wireless Sensor Networks, Chunyu Ai, Yueming Duan, Mingyuan Yan, Jing He
Faculty Articles
Area query processing is significant for various applications of wireless sensor networks since it can request information of particular areas in the monitored environment. Existing query processing techniques cannot solve area queries. Intuitively centralized processing on Base Station can accomplish area queries via collecting information from all sensor nodes. However, this method is not suitable for wireless sensor networks with limited energy since a large amount of energy is wasted for reporting useless data. This motivates us to propose an energy-efficient in-network area query processing scheme. In our scheme, the monitored area is partitioned into grids, and a unique gray …
Wikis: The Perfect Platform For Library Policies And Procedures, Melanie J. Dunn
Wikis: The Perfect Platform For Library Policies And Procedures, Melanie J. Dunn
The Southeastern Librarian
The term wiki, derived from the Hawaiian adjective “wiki wiki” meaning quick or fast, was coined by Ward Cunningham who created the original WikiWikiWeb for the Portland Pattern Repository (Leuf, 2001, 15). Touted by Cunningham as “the simplest online database that could possibly work” (Cunningham, 2002, June 27) “ wiki” is alternately used to refer to both a wiki website and the software used to create and maintain it and was designed to allow multiple users to collaborate in its development (Klobas 2006, 3). Wikipedia is perhaps one of the best examples, as well as the most recognized, of wikis. …
Hamilton Decompositions Of 6-Regular Cayley Graphs On Even Abelian Groups With Involution-Free Connections Sets, Erik E. Westlund
Hamilton Decompositions Of 6-Regular Cayley Graphs On Even Abelian Groups With Involution-Free Connections Sets, Erik E. Westlund
Faculty Articles
Alspach conjectured that every connected Cayley graph on a finite Abelian group A is Hamilton-decomposable. Liu has shown that for |A| even, if S={s1,…,sk}⊂A is an inverse-free strongly minimal generating set of A, then the Cayley graph Cay(A;S⋆), is decomposable into k Hamilton cycles, whereS⋆ denotes the inverse-closure of S. Extending these techniques and restricting to the 6-regular case, this article relaxes the constraint of strong minimality on S to require only that S be strongly a-minimal, for somea∈S and the index of 〈a〉 be at least four. Strong a-minimality means that 2s∉〈a〉 for all s∈S∖{a,−a}. Some infinite families of …
An Item Response Curves Analysis Of The Force Concept Inventory, Gary A. Morris, Nathan Harshman, Lee Branum-Martin, Eric Mazur, Taha Mzoughi, Stephen D. Baker
An Item Response Curves Analysis Of The Force Concept Inventory, Gary A. Morris, Nathan Harshman, Lee Branum-Martin, Eric Mazur, Taha Mzoughi, Stephen D. Baker
Faculty Articles
Several years ago, we introduced the idea of item response curves (IRC), a simplistic form of item response theory (IRT), to the physics education research community as a way to examine item performance on diagnostic instruments such as the Force Concept Inventory (FCI). We noted that a full-blown analysis using IRT would be a next logical step, which several authors have since taken. In this paper, we show that our simple approach not only yields similar conclusions in the analysis of the performance of items on the FCI to the more sophisticated and complex IRT analyses but also permits additional …
Top-Quark Production And Qcd, Nikolaos Kidonakis, Ben D. Pecjak
Top-Quark Production And Qcd, Nikolaos Kidonakis, Ben D. Pecjak
Faculty Articles
We review theoretical calculations for top-quark production that include complete next-to-leading-order QCD corrections as well as higher-order soft-gluon corrections from threshold resummation. We discuss in detail the differences between various approaches that have appeared in the literature and review results for top-quark total cross sections and differential distributions at the Tevatron and the LHC.
Differential Cross Sections For Top-Pair And Single-Top Production, Nikolaos Kidonakis
Differential Cross Sections For Top-Pair And Single-Top Production, Nikolaos Kidonakis
Faculty Articles
I present theoretical results at approximate NNLO from NNLL resummation for top quark production at the LHC and the Tevatron, including new results at 8 TeV LHC energy. Total cross sections are shown for tt¯ production, for single top production in the t and s channels and via associated tW production, and for associated tH− production. Top quark transverse momentum and rapidity distributions in tt¯production are also presented, as well as new results for t-channel single top and single antitop pT distributions.
Differential And Total Cross Sections For Top Pair And Single Top Production, Nikolaos Kidonakis
Differential And Total Cross Sections For Top Pair And Single Top Production, Nikolaos Kidonakis
Faculty Articles
I present theoretical results at approximate NNLO from NNLL resummation for top quark production at the LHC and the Tevatron, including new results at 8 TeV LHC energy. Total cross sections are shown for tt¯ production, for single top production in the t and s channels and via associated tW production, and for associated tH− production. Top quark transverse momentum and rapidity distributions in tt¯production are also presented, as well as new results for t-channel single top and single antitop pT distributions.
Towards Self-Emancipation In Ict For Development Research: Narratives About Respect, Traditional Leadership And Building Networks Of Friendships In Rural South Africa, Kirstin Krauss
The African Journal of Information Systems
In this paper, the author contends that if the outsider-researcher involved in Information and Communication Technology for Development really wants to make a difference and honestly address the emancipatory interests of the developing community, social transformation will have to occur on both sides of the “development divide.” This statement implies both an understanding of the researcher’s own ethnocentrism, prejudice, assumptions and inabilities as well as local concerns, needs, expectations and realities. Using critical social theory as a position of inquiry and learning from the enculturation phases of critical ethnographic fieldwork in a deep rural part of South Africa, the paper …
2012 - The Seventeenth Annual Symposium Of Student Scholars
2012 - The Seventeenth Annual Symposium Of Student Scholars
Symposium of Student Scholars Program Books
The full program book from the Seventeenth Annual Symposium of Student Scholars, held on April 10, 2012. Includes abstracts from the presentations and posters.
Following Student Gaze Patterns In Physical Science Lectures, David Rosengrant, Doug Hearrington, Kerriann Alvarado, Danielle Keeble
Following Student Gaze Patterns In Physical Science Lectures, David Rosengrant, Doug Hearrington, Kerriann Alvarado, Danielle Keeble
Faculty Articles
This study investigates the gaze patterns of undergraduate college students attending a lecture-based physical science class to better understand the relationships between gaze and focus patterns and student attention during class. The investigators used a new eye-tracking product; Tobii Glasses. The glasses eliminate the need for subjects to focus on a computer screen or carry around a backpack-sized recording device, thus giving an investigator the ability to study a broader range of research questions. This investigation includes what students focus on in the classroom (i.e. demonstrations, instructor, notes, board work, and presentations) during a normal lecture, what diverts attention away …
The Kolmogorov And Stechkin Problems For Classes Of Functions Whose Second Derivative Belongs To The Orlicz Space, Yuliya Babenko, Dmitry Skorokhodov
The Kolmogorov And Stechkin Problems For Classes Of Functions Whose Second Derivative Belongs To The Orlicz Space, Yuliya Babenko, Dmitry Skorokhodov
Faculty Articles
For any t ∈ [0, 1], we obtain the exact value of the modulus of continuity , where L* is the dual Orlicz space with Luxemburg norm and D is the operator of differentition at the point t. As an application, we state necessary and sufficient conditions in the Kolmogorov problem for three numbers. Also we solve the Stechkin problem, i.e., the problem of approximating an unbounded operator of differentition D by bounded linear operators for the class of functions x such that $\left\| {x''} \right\|_{L_N^* [0,1]} \leqslant 1$
Interaction Of Ultrashort-Laser Pulses With Induced Undercritical Plasmas In Fused Silica, Jeremy R. Gulley, Sebastian W. Winkler, William M. Dennis, Carl M. Liebig, Razvan Stoian
Interaction Of Ultrashort-Laser Pulses With Induced Undercritical Plasmas In Fused Silica, Jeremy R. Gulley, Sebastian W. Winkler, William M. Dennis, Carl M. Liebig, Razvan Stoian
Faculty Articles
Ultrafast light-material interactions near the damage threshold are often studied using postmortem analysis of damaged dielectric materials. Corresponding simulations of ultrashort pulse propagation through the material are frequently used to gain additional insight into the processes leading to such damage. However, comparison between such experimental and numerical results is often qualitative, and pulses near to but not exceeding the damage threshold leave no permanent changes in the material for postmortem analysis. In this article, a series of experiments is presented that measures the near- and far-field properties of a 140-fs laser pulse after propagation through a fused silica sample in …
Hypotheses Generation As Supervised Link Discovery With Automated Class Labeling On Large-Scale Biomedical Concept Networks, Jayasimha R. Katukuri, Ying Xie, Vijay Raghavan, Ashish Gupta
Hypotheses Generation As Supervised Link Discovery With Automated Class Labeling On Large-Scale Biomedical Concept Networks, Jayasimha R. Katukuri, Ying Xie, Vijay Raghavan, Ashish Gupta
Faculty Articles
Computational approaches to generate hypotheses from biomedical literature have been studied intensively in recent years. Nevertheless, it still remains a challenge to automatically discover novel, cross-silo biomedical hypotheses from large-scale literature repositories. In order to address this challenge, we first model a biomedical literature repository as a comprehensive network of biomedical concepts and formulate hypotheses generation as a process of link discovery on the concept network. We extract the relevant information from the biomedical literature corpus and generate a concept network and concept-author map on a cluster using Map-Reduce framework. We extract a set of heterogeneous features such as random …