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Articles 1411 - 1440 of 2397
Full-Text Articles in Entire DC Network
Burnout Is Associated With A Depressive Cognitive Style, Renzo Bianchi, Irvin Sam Schonfeld
Burnout Is Associated With A Depressive Cognitive Style, Renzo Bianchi, Irvin Sam Schonfeld
Publications and Research
We examined whether burnout is associated with a depressive cognitive style, understood as a combination of dysfunctional attitudes, ruminative responses, and pessimistic attributions. A total of 1386 U.S. public school teachers were included—1063 women (M_age: 42.73, SD_age = 11.36) and 323 men (M_age: 44.60, SD_age = 11.42). Burnout was assessed with the Shirom–Melamed Burnout Measure (SMBM). Dysfunctional attitudes were measured with the Dysfunctional Attitude Scale Short Form, ruminative responses with the Ruminative Responses Scale, and pessimistic attributions with the Depressive Attributions Questionnaire. For comparative purposes, depression was assessed using the 9-item depression module of the …
Density Functional Investigation Of The Inclusion Of Gold Clusters On A Ch3s Self-Assembled Lattice On Au(111), Darnel J. Allen, Wayne E. Archibald, John A. Harper, John C. Saputo, Daniel Torres
Density Functional Investigation Of The Inclusion Of Gold Clusters On A Ch3s Self-Assembled Lattice On Au(111), Darnel J. Allen, Wayne E. Archibald, John A. Harper, John C. Saputo, Daniel Torres
Publications and Research
We employ first-principles density functional theoretical calculations to address the inclusion of gold (Au) clusters in a well-packed CH3S self-assembled lattice. We compute CH3S adsorption energies to quantify the energetic stability of the self-assembly and gold adsorption and dissolution energies to characterize the structural stability of a series of Au clusters adsorbed at the SAM-Au interface. Our results indicate that the inclusion of Au clusters with less than four Au atoms in the SAM-Au interface enhances the binding of CH3S species. In contrast, larger Au clusters destabilize the self-assembly.We attribute this effect to the low-coordinated gold atoms in the cluster. …
U.S. Lags Behind In Many Areas Of Higher Ed, Aldemaro Romero Jr.
U.S. Lags Behind In Many Areas Of Higher Ed, Aldemaro Romero Jr.
Publications and Research
No abstract provided.
Study Of The Kkk System In Hyperspherical Formalism, Roman Ya. Kezerashvili, Shalva M. Tsiklauri
Study Of The Kkk System In Hyperspherical Formalism, Roman Ya. Kezerashvili, Shalva M. Tsiklauri
Publications and Research
The three-body kaonic system KKK is studied in the framework of a singlechannel potential nonrelativistic model using the method of hyperspherical harmonics in momentum representation. Calculations are performed with two sets of KK and KK potentials. A quasibound state for the KK _K system with spin-parity 0− and isospin 1/2 is found below the three-kaon threshold.
Combining Body Mass And Shape Indices In Clinical Practice, Jesse C. Krakauer, Nir Y. Krakauer
Combining Body Mass And Shape Indices In Clinical Practice, Jesse C. Krakauer, Nir Y. Krakauer
Publications and Research
We present preliminary clinical experience with combined consideration of the commonly used BMI (body mass index) and the newly developed ABSI (a body shape index) using a point of care anthropometric calculator for comparisons of index values and associated relative risks to population normals. In a series of 282 patients, BMI and ABSI were close to being independently distributed, supporting the value of considering both indices. Three selected cases illustrate scenarios where assessment of ABSI together with BMI could inform patient care and counseling. These data suggest that combined assessment of BMI and ABSI may prove useful in clinical practice.
Self-Assembly Of Gold Supraparticles With Crystallographically Aligned And Strongly Coupled Nanoparticle Building Blocks For Sers And Photothermal Therapy, S. Paterson, S. A. Thompson, J. Gracie, A. W. Wark, R. De La Rica
Self-Assembly Of Gold Supraparticles With Crystallographically Aligned And Strongly Coupled Nanoparticle Building Blocks For Sers And Photothermal Therapy, S. Paterson, S. A. Thompson, J. Gracie, A. W. Wark, R. De La Rica
Publications and Research
A new method is introduced for self-assembling citrate-capped gold nanoparticles into supraparticles with crystallographically aligned building blocks. It consists in confining gld nanoparticles inside a cellulose acetate membrane. The constituent nanoparticles are in close contact in the superstructure, and therefore generate hot spots leading to intense Surface-Enhanced Raman Scattering (SERS) signals. They also generate more plasmonic heat than the nanoparticle building blocks. The supraparticles are internalized by cells and show low cytotoxicity, but can kill cancer cells when irradiated with a laser. This, along with the improved plasmonic properties arising from their assembly, makes the gold supraparticles promising materials for …
Multiple Problem-Solving Strategies Provide Insight Into Students’ Understanding Of Open-Ended Linear Programming Problems, Marla A. Sole
Multiple Problem-Solving Strategies Provide Insight Into Students’ Understanding Of Open-Ended Linear Programming Problems, Marla A. Sole
Publications and Research
Open-ended questions that can be solved using different strategies help students learn and integrate content, and provide teachers with greater insights into students’ unique capabilities and levels of understanding. This article provides a problem that was modified to allow for multiple approaches. Students tended to employ high-powered, complex, familiar solution strategies rather than simpler, more intuitive strategies, which suggests that students might need more experience working with informal solution methods. During the semester, by incorporating open-ended questions, I gained valuable feedback, was able to better model real-world problems, challenge students with different abilities, and strengthen students’ problem solving skills.
M. Riesz Theorem On Conjugate Harmonic Functions For Octonion-Valued Monogenic Functions, Sultan Catto, Alexander Kheyfits, David E. Tepper
M. Riesz Theorem On Conjugate Harmonic Functions For Octonion-Valued Monogenic Functions, Sultan Catto, Alexander Kheyfits, David E. Tepper
Publications and Research
The classical theorem of M. Riesz about the conjugate harmonic functions is extended onto octonion-valued monogenic functions.
Teaching Evolution: Blog As A Liminal Space, Shylaja Akkaraju, Alexander Wolf
Teaching Evolution: Blog As A Liminal Space, Shylaja Akkaraju, Alexander Wolf
Publications and Research
A threshold concept is a challenging concept that acts as a doorway leading to deeper understanding and a dramatic shift in perception. A learner that is in- volved in grasping a threshold concept is said to be undergoing a threshold expe- rience within a liminal space or learning environment. We used the blog as a lim- inal space for our students to engage with the theory of evolution, which is a threshold concept. In order to teach evolution effectively it is necessary to address both understanding and acceptance of evolutionary theory. To explore the latter in an introductory biology course, …
Middle Preclassic Period Maya Greenstone "Triangulates": Forms, Contexts, And Geology Of A Unique Mesoamerican Groundstone Artifact Type, Terry G. Powis, Sherman Horn Iii, Gyles Iannone, Paul F. Healy, James F. Garber, Jaime J. Awe, Sheldon Skaggs, Linda A. Howie
Middle Preclassic Period Maya Greenstone "Triangulates": Forms, Contexts, And Geology Of A Unique Mesoamerican Groundstone Artifact Type, Terry G. Powis, Sherman Horn Iii, Gyles Iannone, Paul F. Healy, James F. Garber, Jaime J. Awe, Sheldon Skaggs, Linda A. Howie
Publications and Research
Over the past twenty years our understanding of the Middle Preclassic (900–300 BCE) period has become much clearer through archaeological investigations at a number of sites located in the Upper Belize River Valley region of the eastern Maya Lowlands. While the picture of Middle Preclassic Maya life, including their material culture, has sharpened, there are aspects that remain uninvestigated. One artifact type, identified as greenstone triangulates, has been found at several Belize Valley sites and in a variety of contexts. Although a number of these multifaceted, polished groundstone items have been recovered, little research has focused on their distribution and …
Locating Architectural Production, Phillip Anzalone, Stephanie Bayard
Locating Architectural Production, Phillip Anzalone, Stephanie Bayard
Publications and Research
No abstract provided.
Identifying Threshold Concepts For Information Literacy: A Delphi Study, Lori Townsend, Amy R. Hofer, Silvia L. Lin Hanick, Korey Brunetti
Identifying Threshold Concepts For Information Literacy: A Delphi Study, Lori Townsend, Amy R. Hofer, Silvia L. Lin Hanick, Korey Brunetti
Publications and Research
This study used the Delphi method to engage expert practitioners on the topic of threshold concepts—core ideas and processes in a discipline that students need to grasp in order to progress in their learning, but that are often unspoken or unrecognized by expert practitioners—for information literacy. A panel of experts considered two questions: First, is the threshold concept approach useful for information literacy instruction? The panel unanimously agreed that the threshold concept approach holds potential for information literacy instruction. Second, what are the threshold concepts for information literacy instruction? The panel proposed and discussed over 50 potential threshold concepts, finally …
Unifying Ancient And Modern Geometries Through Octonions, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt
Unifying Ancient And Modern Geometries Through Octonions, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt
Publications and Research
We show the first unified description of some of the oldest known geometries such as the Pappus’ theorem with more modern ones like Desargues’ theorem, Monge’s theorem and Ceva’s theorem, through octonions, the highest normed division algebra in eight dimensions. We also show important applications in hadronic physics, giving a full description of the algebra of color applicable to quark physics, and comment on further applications.
Clifford Algebras And Their Decomposition Into Conjugate Fermionic Heisenberg Algebras, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt, V. Kato La
Clifford Algebras And Their Decomposition Into Conjugate Fermionic Heisenberg Algebras, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt, V. Kato La
Publications and Research
We discuss a construction scheme for Clifford numbers of arbitrary dimension. The scheme is based upon performing direct products of the Pauli spin and identity matrices. Conjugate fermionic algebras can then be formed by considering linear combinations of the Clifford numbers and the Hermitian conjugates of such combinations. Fermionic algebras are important in investigating systems that follow Fermi-Dirac statistics. We will further comment on the applications of Clifford algebras to Fueter analyticity, twistors, color algebras, M-theory and Leech lattice as well as unification of ancient and modern geometries through them.
The Technological Enhancement Of Normally Occurring Radioactive Materials In Red Mud Due To The Production Of Alumina, Maurice O. Miller, Dionne A. Miller
The Technological Enhancement Of Normally Occurring Radioactive Materials In Red Mud Due To The Production Of Alumina, Maurice O. Miller, Dionne A. Miller
Publications and Research
This study investigates the level of technological enhancement of normally occurring radioactive materials (TENORM) in the red mud waste due to the production of alumina in Jamaica. Technological enhancements factors (TEF) were determined for the uranium, thorium, actinium series, their progenies, and the nonseries potassium-40 using gamma spectrometry. The study concluded that bauxite production technologically enhances the uranium progenies Th-234, Pb-214, Bi-214, and Pa-234 and the thorium-232 progenies Ac-228, Pb-212, and Bi-212 in red mud. The actinium series was technologically enhanced, but K-40 and the thorium daughter, Tl-208, were reduced. The spectrometric comparison of Tl-208 (at 510 keV) was unexpected …
Moments Method For Shell-Model Level Density, V. Zelevinsky, M. Horoi, Roman A. Sen′Kov
Moments Method For Shell-Model Level Density, V. Zelevinsky, M. Horoi, Roman A. Sen′Kov
Publications and Research
The modern form of the Moments Method applied to the calculation of the nuclear shell-model level density is explained and examples of the method at work are given. The calculated level density practically exactly coincides with the result of full diagonalization when the latter is feasible. The method provides the pure level density for given spin and parity with spurious center-of-mass excitations subtracted. The presence and interplay of all correlations leads to the results different from those obtained by the mean-field combinatorics.
Caricature And Hyperbole In Preservice Teacher Professional Development, Mica Pollock, Candice Bocala, Sherry L. Deckman, Shari Dickstein-Staub
Caricature And Hyperbole In Preservice Teacher Professional Development, Mica Pollock, Candice Bocala, Sherry L. Deckman, Shari Dickstein-Staub
Publications and Research
Professional development (PD) “for diversity” aims to prepare teachers to support students from varying backgrounds to succeed, often in underresourced contexts. Although many teachers invite such inquiry as part of learning to teach, others resist “diversity” inquiry as extra to teaching, saying they cannot “do it all.” In this article, we discuss how preservice teachers at times caricature the requests of PD for diversity, hearing the task as a call to undertake superhuman tasks and to be people other than who they are. We argue that these caricatures require direct acknowledgment by both preservice teachers and teacher educators working in …
Locally Anisotropic Toposes, Jonathon Funk, Pieter Hofstra
Locally Anisotropic Toposes, Jonathon Funk, Pieter Hofstra
Publications and Research
This paper continues the investigation of isotropy theory for toposes. We develop the theory of isotropy quotients of toposes, culminating in a structure theorem for a class of toposes we call locally anisotropic. The theory has a natural interpretation for inverse semigroups, which clarifies some aspects of how inverse semigroups and toposes are related.
Application Of Cognitive Apprenticeship Model (Ca) To Library Instruction, Elizabeth K. Tompkins
Application Of Cognitive Apprenticeship Model (Ca) To Library Instruction, Elizabeth K. Tompkins
Publications and Research
The cognitive apprenticeship model, which links apprenticeship-learning techniques and classroom practices, offers a flexible framework for planning and implementing library sessions. Originally developed by educators Collins, Brown, and Newman, cognitive apprenticeship illuminates the thought process of teachers and other experts while they deliver instruction in problem solving, close reading, critical thinking, or other higher order reasoning. This paper discusses how librarians can employ the cognitive apprenticeship model to collapse the thought process associated with library research into components that are comprehensible to all levels of students.
Development And Separation Of Forced Convective Flow, Adefemi Sunmonu
Development And Separation Of Forced Convective Flow, Adefemi Sunmonu
Publications and Research
Singularities are considered in the solution of the laminar bound- ary - layer equation at a position of separation. The works of Howarth (1938). Goldstein (1948), Stewartson (1958), Terrill (1960) and Akin- relere [(1981), (1982)] are reviewed to fully establish the existence of singularity in the incompressible boundary layer at separation for both the velocity and thermal fields. A ow at a large Reynold's number along an immersed solid surface around which bounda y layer is formed through which the velocity rises rapidly from zero at the surface to its value in the main stream is considered. It is found …
Signature Of Structural Distortion In Optical Spectra Of Yfe2o4 Thin Film, R. C. Rai, J. Hinz, G. X. A. Petronilo, F. Sun, H. Zeng, Mim Lal Nakarmi, P. R. Niraula
Signature Of Structural Distortion In Optical Spectra Of Yfe2o4 Thin Film, R. C. Rai, J. Hinz, G. X. A. Petronilo, F. Sun, H. Zeng, Mim Lal Nakarmi, P. R. Niraula
Publications and Research
We report structural, optical, and electro-optical properties of polycrystalline YFe2O4 thin films, deposited on (0001) sapphire substrates using the electron-beam deposition technique. The optical spectra of a 120 nm YFe2O4 show Fe d to d on-site and O 2p to Fe 3d, Y 4d, and Y 5s charge-transfer electronic excitations. Anomalies in the temperature dependence data of the charge-transfer excitations and the splitting of the 4.46 eV charge-transfer peak strongly suggest a structural distortion at 180 ± 10 K. Evidence of such a structural distortion is also manifested in the surface resistance versus temperature data. In addition, the YFe2O4 thin …
Generalizing Liouville-Type Problems For Differential 1-Forms From Lq Spaces To Non-Lq Spaces, Lina Wu, Ye Li
Generalizing Liouville-Type Problems For Differential 1-Forms From Lq Spaces To Non-Lq Spaces, Lina Wu, Ye Li
Publications and Research
We obtain Liouville-type results for closed and p-pseudo-coclosed differential 1-forms ! with energy of lim inf r!1 1 r2 R B(x0;r) j!jqdv < 1 (that is, 2-finite growth), which extends finite q-energy ( R M j!jqdv < 1) in Lq spaces to infinite q-energy ( R M j!jqdv = 1) in non-Lq spaces. In particular, we recapture mathematicians' vanishing results of Liouville- type theorem for ! with finite q-energy in Lq spaces. Our method in this paper provides a successful way to work on Liouville-type problems for differential forms with a variety of energy conditions in broad spaces.
Kpp And Kkp Clusters, Roman Ya. Kezerashvili, Shalva M. Tsiklauri, Igor N. Filikhin, Vladimir M. Suslov, Branislav Vlahovic
Kpp And Kkp Clusters, Roman Ya. Kezerashvili, Shalva M. Tsiklauri, Igor N. Filikhin, Vladimir M. Suslov, Branislav Vlahovic
Publications and Research
The three-body kaonic Kpp and KKp clusters are studied using the method of hyperspherical harmonics (HH) in momentum representation and differential Faddeev equations (DFE). We use different NN and KN interactions. Results obtained by the methods of HH and DFE are in reasonable agreement. The binding energy and the width show very strong dependence on the KN potential. We have two different classes of results: the results based on phenomenological strong KN potential, and the results obtained with much weaker chiral SU(3)-based KN potential.
Effect Of Impurities On The Josephson Current Through Helical Metals: Exploiting A Neutrino Paradigm, V. Parameswaran Nair, Pouyan Ghaemi
Effect Of Impurities On The Josephson Current Through Helical Metals: Exploiting A Neutrino Paradigm, V. Parameswaran Nair, Pouyan Ghaemi
Publications and Research
In this letter we study the effect of time-reversal symmetric impurities on the Josephson supercurrent through two dimensional helical metals such as on topological insulator surface state. We show that contrary to the usual superconducting-normal metal-superconducting junctions, the suppression of supercurrent in superconducting-helical metal-superconducting junction is mainly due to fluctuations of impurities in the junctions. Our results, which is a condensed matter realization of a part of the MSW effect for neutrinos, shows that the relationship between normal state conductance and critical current of Josephson junctions is significantly modified for Josephson junctions on the surface of topological insulators. We also …
Elements Of Geometric Quantization And Applications To Fields And Fluids, V. Parameswaran Nair
Elements Of Geometric Quantization And Applications To Fields And Fluids, V. Parameswaran Nair
Publications and Research
These lecture notes (from the Second Autumn School in High Energy Physics and Quantum Field Theory, Yerevan 2014) cover a number of topics related to geometric quantization. Most of the material is presented from a physicist's point of view. The original notes are posted at \verb+http://theorphyslab-ysu.info/VW_ASW-2014/uploads/ArmeniaLectures.pdf+. The have been revised with some additions and changes, although referencing is still somewhat dated. These notes are posted here as they may be good background material for some recent papers.
Insights Into The Molecular Antiviral Mechanism Of Pokeweed Protein From Phytolacca Americana, Valentina R. Aitbakieva, Artem V. Domashevskiy
Insights Into The Molecular Antiviral Mechanism Of Pokeweed Protein From Phytolacca Americana, Valentina R. Aitbakieva, Artem V. Domashevskiy
Publications and Research
Agriculture is an indispensable part of every person’s life, ensuring that nutritious and inexpensive food is readily available. As any other organisms, plants are subject to numerous parasitic infections. Biological evolution has allowed plants to produce a variety of toxic compounds to deal with their pathogens. American pokeweed plant (Phytolacca americana) manufactures pokeweed antiviral protein, a ribosome inactivating protein that disrupts protein synthesis and lowers infectivity of many plant and animal viruses. The intricate mechanism of PAP antiviral activity entails a delicate coordination and interplay of several factors, allowing the plant to battle its invaders. Here, we examine the molecular …
Jewel, Purse, Trash: Reckoning And Reputation In Othello, Laura Kolb
Jewel, Purse, Trash: Reckoning And Reputation In Othello, Laura Kolb
Publications and Research
This article offers an analysis of Shakespeare’s Othello alongside arithmetic textbooks for merchants and soldiers. It argues that Othello dramatizes a problem that also haunts the pages of these math books: the problem of calculating the value of persons in a society where new forms of commercial credit were unsettling traditional notions of worth grounded in status, military prowess and sexual purity. Othello’s loss of faith in his wife and the disintegration of his sense of self both depend on Iago’s manipulation of two competing models of reputation: one based on martial valor and sexual purity (reputation as honor) and …
Scandals Follow Hubris In Higher Education, Aldemaro Romero Jr.
Scandals Follow Hubris In Higher Education, Aldemaro Romero Jr.
Publications and Research
No abstract provided.
An Overview Of Causal Directed Acyclic Graphs For Substance Abuse Researchers, Michael Lewis, Alexis Kuerbis
An Overview Of Causal Directed Acyclic Graphs For Substance Abuse Researchers, Michael Lewis, Alexis Kuerbis
Publications and Research
Background. Within substance abuse research, quantitative methodologists tend to view randomized controlled trials (RCTs) as the “gold standard” for estimating causal effects, in part due to experimental manipulation and random assignment. Such methods are not always possible due to ethical and other reasons. Causal directed acyclic graphs (causal DAGs) are mathematical tools for (1) precisely stating researchers' causal assumptions and (2) providing guidance regarding the specification of statistical models for causal inference with nonexperimental data (such as epidemiological data). Purpose. This manuscript describes causal DAGs and illustrates their use in regards to a long standing theory within the field of …
Automated Refactoring Of Legacy Java Software To Enumerated Types, Raffi Khatchadourian
Automated Refactoring Of Legacy Java Software To Enumerated Types, Raffi Khatchadourian
Publications and Research
Modern Java languages introduce several new features that offer significant improvements over older Java technology. In this article we consider the new enum construct, which provides language support for enumerated types. Prior to recent Java languages, programmers needed to employ various patterns (e.g., the weak enum pattern) to compensate for the absence of enumerated types in Java. Unfortunately, these compensation patterns lack several highly-desirable properties of the enum construct, most notably, type safety. We present a novel fully-automated approach for transforming legacy Java code to use the new enumeration construct. This semantics-preserving approach increases type safety, produces code that is …