Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Earth Sciences (59004)
- Computer Sciences (58255)
- Environmental Sciences (52548)
- Engineering (40351)
- Life Sciences (40157)
-
- Physics (36682)
- Chemistry (34720)
- Geology (29735)
- Mathematics (27476)
- Social and Behavioral Sciences (24630)
- Oceanography and Atmospheric Sciences and Meteorology (16471)
- Statistics and Probability (13315)
- Education (12831)
- Computer Engineering (12825)
- Soil Science (12158)
- Medicine and Health Sciences (11855)
- Plant Sciences (11367)
- Natural Resources and Conservation (10281)
- Arts and Humanities (9740)
- Astrophysics and Astronomy (9217)
- Electrical and Computer Engineering (8910)
- Sustainability (8728)
- Natural Resources Management and Policy (8597)
- Artificial Intelligence and Robotics (8559)
- Water Resource Management (8308)
- Applied Mathematics (8028)
- Environmental Health and Protection (6948)
- Databases and Information Systems (6778)
- Science and Mathematics Education (6760)
- Institution
-
- University of Nebraska - Lincoln (24326)
- Western Michigan University (19508)
- Selected Works (16838)
- University of Kentucky (12194)
- TÜBİTAK (10319)
-
- Singapore Management University (7542)
- Utah State University (7353)
- Missouri University of Science and Technology (6086)
- Old Dominion University (5960)
- University of Wollongong (4868)
- William & Mary (4601)
- University of South Florida (3861)
- Wright State University (3840)
- Portland State University (3812)
- University of Nevada, Las Vegas (3639)
- Louisiana State University (3427)
- China Simulation Federation (3382)
- Brigham Young University (3243)
- City University of New York (CUNY) (3224)
- Purdue University (2815)
- Air Force Institute of Technology (2682)
- Claremont Colleges (2641)
- California Polytechnic State University, San Luis Obispo (2571)
- University of Arkansas, Fayetteville (2500)
- Western Washington University (2456)
- University of Texas Rio Grande Valley (2436)
- Department of Primary Industries and Regional Development, Western Australia (2378)
- University of Texas at El Paso (2327)
- Chinese Chemical Society | Xiamen University (2295)
- Chulalongkorn University (2267)
- Keyword
-
- Machine learning (1701)
- Climate change (1683)
- Western Australia (1597)
- Mathematics (1376)
- Chemistry (1159)
-
- Sustainability (1145)
- Physics (1067)
- Water quality (986)
- Deep learning (895)
- Geology (891)
- Groundwater (859)
- Machine Learning (834)
- Simulation (828)
- Research and Technical Reports (797)
- Water (780)
- United States (759)
- Education (758)
- Management (747)
- Nebraska (744)
- Agriculture (720)
- Artificial intelligence (718)
- Climate (705)
- GIS (700)
- Statistics (686)
- Security (680)
- Environment (674)
- Grains and field crops (674)
- Computer Science (666)
- Optimization (661)
- Ecology (659)
- Publication Year
-
- 2024 (8457)
- 2023 (12690)
- 2022 (18368)
- 2021 (27992)
- 2020 (15201)
-
- 2019 (15916)
- 2018 (13652)
- 2017 (12587)
- 2016 (12722)
- 2015 (12624)
- 2014 (12301)
- 2013 (11799)
- 2012 (12196)
- 2011 (10324)
- 2010 (8625)
- 2009 (7617)
- 2008 (7328)
- 2007 (6763)
- 2006 (5877)
- 2005 (5580)
- 2004 (4449)
- 2003 (3882)
- 2002 (3436)
- 2001 (3032)
- 2000 (2921)
- 1999 (2557)
- 1998 (2577)
- 1997 (2473)
- 1996 (2438)
- 1995 (2196)
- Publication
-
- Legacy Scout Tickets from Pure Oil Company (11044)
- Theses and Dissertations (8371)
- IGC Proceedings (1993-2023) (7168)
- Research Collection School Of Computing and Information Systems (6974)
- Thin Sections (5745)
-
- Electronic Theses and Dissertations (4214)
- Faculty Publications (3809)
- Journal of System Simulation (3382)
- Nebraska Tractor Tests (3348)
- Turkish Journal of Electrical Engineering and Computer Sciences (3020)
- Masters Theses (2634)
- Turkish Journal of Chemistry (2628)
- Turkish Journal of Mathematics (2494)
- Journal of Electrochemistry (2295)
- Honors Theses (2164)
- Faculty of Informatics - Papers (Archive) (2013)
- Physics Faculty Publications (1943)
- Bulletin of the Mineral Research and Exploration (1893)
- Doctoral Dissertations (1883)
- Dissertations, Theses, and Masters Projects (1876)
- Reports (1835)
- Dissertations (1827)
- Physics Faculty Research & Creative Works (1771)
- Department of Computer Science Technical Reports (1721)
- USF Tampa Graduate Theses and Dissertations (1608)
- School of Natural Resources: Faculty Publications (1586)
- United States Department of Agriculture Wildlife Services: Staff Publications (1529)
- Australian Institute for Innovative Materials - Papers (1524)
- Electronic Thesis and Dissertation Repository (1477)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (1428)
- Publication Type
Articles 137821 - 137850 of 303928
Full-Text Articles in Physical Sciences and Mathematics
Generation Of A Complete Set Of Additive Shape-Invariant Potentials From An Euler Equation, Jonathan Bougie, Asim Gangopadhyaya, Jeffrey Mallow
Generation Of A Complete Set Of Additive Shape-Invariant Potentials From An Euler Equation, Jonathan Bougie, Asim Gangopadhyaya, Jeffrey Mallow
Asim Gangopadhyaya
In supersymmetric quantum mechanics, shape invariance is a sufficient condition for solvability. We show that all conventional additive shape-invariant superpotentials that are independent of ħ can be generated from two partial differential equations. One of these is equivalent to the one-dimensional Euler equation expressing momentum conservation for inviscid fluid flow, and it is closed by the other. We solve these equations, generate the set of all conventional shape-invariant superpotentials, and show that there are no others in this category. We then develop an algorithm for generating all additive shape-invariant superpotentials including those that depend on ħ explicitly.
Supersymmetry And The Tunneling Problem In An Asymmetric Double Well, Asim Gangopadhyaya, Prasanta Panigrahi, Uday Sukhatne
Supersymmetry And The Tunneling Problem In An Asymmetric Double Well, Asim Gangopadhyaya, Prasanta Panigrahi, Uday Sukhatne
Asim Gangopadhyaya
The techniques of supersymmetric quantum mechanics are applied to the calculation of the energy difference between the ground state and the first excited state of an asymmetric double well. This splitting, originating from the tunneling effect, is computed via a systematic, rapidly converging perturbation expansion. Perturbative calculations to any order can be easily carried out using a logarithmic perturbation theory. Our approach yield substantially better results than alternative widely used semiclassical analyses.
Mechanism Of Redox- And Co-Sensing By The Heme Protein, Cooa: Cryoradiolysis Studies, Robert Clark, Deanna Kalafut
Mechanism Of Redox- And Co-Sensing By The Heme Protein, Cooa: Cryoradiolysis Studies, Robert Clark, Deanna Kalafut
Robert Clark
Gas-sensing heme proteins participate in a variety of signal-transduction mechanisms across a broad range of biological systems. This class of proteins functions by undergoing an allosteric conformational change in response to the binding of a small gas molecule to a heme group. CooA, which is a redox- and CO-sensing transcription factor that is found in several bacteria, regulates gene expression that enables growth on CO as a sole energy source. In the current study, we have employed the technique of gamma-irradiation / cryoreduction spectroscopy (cryoradiolysis) to investigate facile changes that occur to the heme coordination structure of CooA during activation. …
Holocene Climatic Change And Past Irish Societal Response, David Brown, M. Baillie, J. Palmer, Christian Turney
Holocene Climatic Change And Past Irish Societal Response, David Brown, M. Baillie, J. Palmer, Christian Turney
David C. Brown
No abstract provided.
Discovering A Research Agenda For Using Design Rationale In Software Maintenance, Janet Burge, David Brown
Discovering A Research Agenda For Using Design Rationale In Software Maintenance, Janet Burge, David Brown
David C. Brown
Design Rationale consists of the reasons behind decisions made while designing. This information would be particularly useful during software maintenance. In this paper, we describe a study performed to investigate the content, structure, and use of design rationale during maintenance. The major goal of this study was to discover an agenda for further research into the use of design rationale for software maintenance.
Measuring The Performance Gains From Directional Antennas In An Unplanned 802.11b Mesh Network, Jason Wilson, Patrick Gemme, Emmanuel Agu
Measuring The Performance Gains From Directional Antennas In An Unplanned 802.11b Mesh Network, Jason Wilson, Patrick Gemme, Emmanuel Agu
Emmanuel O. Agu
Wireless mesh networks are becoming increasingly popular. Most proposed mesh algorithms are evaluated using simulation. Simulations frequently oversimplify real world scenarios and can lead to results that are significantly different. Thus, although it is more difficult to run controlled experiments in already deployed real-world networks, it is important to understand how proposed improvements perform under these realistic scenarios. Several authors have suggested the use of directional antennas, but their merits have only comprehensively evaluated in simulators. Roofnet is an unplanned 802.11b wireless mesh network deployed by MIT and is constructed primarily of omni-directional antennas. We use measurements to evaluate performance …
Inferring Unobservable Learning Variables From Students’ Help Seeking Behavior, Ivon Arroyo
Inferring Unobservable Learning Variables From Students’ Help Seeking Behavior, Ivon Arroyo
Ivon Arroyo
Results of an evaluation of students’ attitudes and their relationship to student behaviors within a tutoring system are presented. Starting from a correlation analysis that integrates survey-collected student attitudes, learning variables, and behaviors while using the tutor, we constructed a Bayesian Network that infers attitudes and perceptions towards help and the tutoring system.
Coastal Resources Management Training Needs Assessment: Strategies And Opportunities, Kevin O'Brien, Claudette Robey, Wendy Kellogg, Michael Tevesz
Coastal Resources Management Training Needs Assessment: Strategies And Opportunities, Kevin O'Brien, Claudette Robey, Wendy Kellogg, Michael Tevesz
Michael J. Tevesz
The Old Woman Creek National Estuarine Research Reserve (OWC), Ohio Department of Natural Resources-Coastal Management Program (ODNRCMP), and Ohio Sea Grant College Program engaged the Great Lakes Environmental Finance Center (GLEFC) to aid them in developing a coastal resources management training initiative for Ohio coastal decision-makers. Coastal decision-maker professionals are expected to formulate effective strategies and apply interdisciplinary approaches to solving problems and policy issues that affect the environments of coastal regions. There are a number of professionals in a variety of occupations who make decisions regarding coastal and environmental policy issues. These individuals include those within the coastal resources …
Silica-Bound Copper(Ii) Triazacyclononane As A Phosphate Esterase: Effect Of Linker Length And Surface Hydrophobicity, Brett Bodsgard, Robert Clark, Anthony Ehrbar, Judith Burstyn
Silica-Bound Copper(Ii) Triazacyclononane As A Phosphate Esterase: Effect Of Linker Length And Surface Hydrophobicity, Brett Bodsgard, Robert Clark, Anthony Ehrbar, Judith Burstyn
Robert Clark
A series of silica-bound Cu(II) triazacyclononane materials was prepared to study the effect of linker length and surface hydrophobicity on the hydrolysis of phosphate esters. The general synthetic approach for these heterogeneous reagents was rhodium-catalyzed hydrosilation between an alkenyl-modified triazacyclononane and hydride-modified silica followed by metallation with a Cu(II) salt. Elemental analysis confirmed that organic functionalization of the silica gel was successful and provided an estimate of the surface concentration of triazacyclononane. EPR spectra were consistent with square pyramidal Cu(II), indicating that Cu(II) ions were bound to the immobilized macrocycles. The hydrolytic efficacies of these heterogeneous reagents were tested with …
Magnet Traveling Through A Conducting Pipe: A Variation On The Analytical Approach, Benjamin Irvine, Matthew Kemnetz, Asim Gangopadhyaya, Thomas Ruubel
Magnet Traveling Through A Conducting Pipe: A Variation On The Analytical Approach, Benjamin Irvine, Matthew Kemnetz, Asim Gangopadhyaya, Thomas Ruubel
Asim Gangopadhyaya
We present an analytical study of magnetic damping. In particular, we investigate the dynamics of a cylindrical neodymium magnet as it moves through a conducting tube. Owing to the very high degree of uniformity of the magnetization for neodymium magnets, we are able to provide completely analytical results for the electromotive force generated in the pipe and the consequent retarding force. Our analytical expressions are shown to have excellent agreement with experimental observations.
Noncentral Potentials And Spherical Harmonics Using Supersymmetry And Shape Invariance, Ranabir Dutt, Asim Gangopadhyaya, Uday Sukhatne
Noncentral Potentials And Spherical Harmonics Using Supersymmetry And Shape Invariance, Ranabir Dutt, Asim Gangopadhyaya, Uday Sukhatne
Asim Gangopadhyaya
It is shown that the operator methods of supersymmetric quantum mechanics and the concept of shape invariance can profitably be used to derive properties of spherical harmonics in a simple way. The same operator techniques can also be applied to several problems with noncentral vector and scalar potentials. As examples, we analyze the bound state spectra of an electron in a Coulomb plus an Aharonov – Bohm field and/or in the magnetic field of a Dirac monopole.
Isomer Distribution Of Succinylcyclohexenyl, Acetylcyclohexenyl And Acetylcyclopentenyl Enamines, A. Cook, Sarah Folk
Isomer Distribution Of Succinylcyclohexenyl, Acetylcyclohexenyl And Acetylcyclopentenyl Enamines, A. Cook, Sarah Folk
A. Gilbert Cook
The isomeric distributions of some cyclohexenyl enamines substituted by succinyl or acetyl groups at either the 2- or 6-positions are reported as are the isomeric distributions of similarly substituted cyclopentenyl enamines. Correlation between the C-13 NMR chemical shifts in these enamines and isomer distribution is shown. Density functional molecular modeling is used to demonstrate resonance and electrostatic effects on isomeric distributions.
Mobile Mud Dynamics In The East China Sea Elucidated Using 210pb, 137cs, 7be, And 234th As Tracers, Jinlong Wang, Jinzhou Du, Mark Baskaran, Jing Zhang
Mobile Mud Dynamics In The East China Sea Elucidated Using 210pb, 137cs, 7be, And 234th As Tracers, Jinlong Wang, Jinzhou Du, Mark Baskaran, Jing Zhang
Environmental Science and Geology Faculty Research Publications
“Mobile mud” (MM), which has fine grain size distribution (>90% clay + silt, and <5% sand) and high porosity (≥0.50), plays an important role in the biogeochemical cycles in the estuarine areas and the inshore shelf. A suite of MM samples from the coastal area of the East China Sea (ECS) was collected in spring and summer of 2011 to observe their spatial and temporal distribution, grain size, and radionuclides concentrations. The MM thickness ranged from 0.5 to 11 cm (average: 2.2 cm (May) and 3.9 cm (August)). The thick mud layer is mainly distributed along the coast, with an area of 2.2 × 104 km2 in May and 1.5 × 104 km2 in August, with corresponding masses of 8.8 × 108 and 7.8 × 108 t, respectively. The estimated masses of MM are considerably larger than the annual sediment discharge mass of the Changjiang River. The distribution of 137Cs inventories in MM indicates that 137Cs can be effectively utilized as a transport tracer of MM in the river‐dominated estuaries and coastal areas. The higher inventories of 7Be in MM in the river mouth in spring are attributed to higher depositional flux and higher sediment discharge. The ratio of the MM inventory of 234Thex/production in the overlying water column of >2.5 in south inshore indicates that the sediment focusing resulted in the increased mass flux. The residence time of MM is estimated as 3–6 years both by mass balance of MM and 210Pbex in MM.
Energy Subsidies And The Future Of Power, Christian Jewett
Energy Subsidies And The Future Of Power, Christian Jewett
Op-Eds from ENSC230 Energy and the Environment: Economics and Policies
The modern political climate has grown rife with talk concerning the use of fossil fuels as an energy source and how this may impact our planet for generations to come. The Left and the Right seem to be at odds over whether or not climate change is actually occurring, or who is causing it. Additionally, the energy industry likes to tout their “low-cost” energy sources as a boon to the global economy as well as a benefit to the consumer at large. However, are coal, oil, and natural gas truly the “cheapest” sources of energy? Whether or not one believes …
Bipartite Probe Interval Graphs, Interval Point Bigraphs, And Circular Arcgraphs, David Brown, J. Lundgren
Bipartite Probe Interval Graphs, Interval Point Bigraphs, And Circular Arcgraphs, David Brown, J. Lundgren
David C. Brown
No abstract provided.
Supersymmetric Quantum Mechanics And Solvable Models, Asim Gangopadhyaya, Jonathan Bougie, Jeffrey Mallow, C. Rasinariu
Supersymmetric Quantum Mechanics And Solvable Models, Asim Gangopadhyaya, Jonathan Bougie, Jeffrey Mallow, C. Rasinariu
Asim Gangopadhyaya
We review solvable models within the framework of supersymmetric quantum mechanics (SUSYQM). In SUSYQM, the shape invariance condition insures solvability of quantum mechanical problems. We review shape invariance and its connection to a consequent potential algebra. The additive shape invariance condition is specified by a difference-differential equation; we show that this equation is equivalent to an infinite set of partial differential equations. Solving these equations, we show that the known list of h-independent superpotentials is complete. We then describe how these equations could be extended to include superpotentials that do depend on h.
Web-Based Intelligent Multimedia Tutoring For High Stakes Achievement Tests, Ivon Arroyo
Web-Based Intelligent Multimedia Tutoring For High Stakes Achievement Tests, Ivon Arroyo
Ivon Arroyo
We describe Wayang Outpost, a web-based ITS for the Math section of the Scholastic Aptitude Test (SAT). It has several distinctive features: help with multimedia animations and sound, problems embedded in narrative and fantasy contexts, alternative teaching strategies for students of different mental rotation abilities and memory retrieval speeds. Our work on adding intelligence for adaptivity is described. Evaluations prove that students learn with the tutor, but learning depends on the interaction of teaching strategies and cognitive abilities. A new adaptive tutor is being built based on evaluation results; surveys results and students’ log files analyses.
Trends Analysis Of Coastal Training Programs In The National Estuarine Research Reserve System: Executive Summary, Claudette Robey, Kevin O'Brien, Kirstin Toth, Dan Baracksay, Michael Mcgoun, Wendy Kellogg, Michael Tevesz
Trends Analysis Of Coastal Training Programs In The National Estuarine Research Reserve System: Executive Summary, Claudette Robey, Kevin O'Brien, Kirstin Toth, Dan Baracksay, Michael Mcgoun, Wendy Kellogg, Michael Tevesz
Michael J. Tevesz
No abstract provided.
Land-Use Pattern, Urbanization, And Deer–Vehicle Collisions In Alabama, Anwar Hussain, James Armstrong, David Brown, John Hogland
Land-Use Pattern, Urbanization, And Deer–Vehicle Collisions In Alabama, Anwar Hussain, James Armstrong, David Brown, John Hogland
David C. Brown
With the rise in deer–vehicle collisions across the United States, the associated costs also have risen. Increasingly, however, researchers are learning that these collisions are not a random phenomena but follow a systematic pattern. Building on this insight, we explored the role of county characteristics in influencing the pattern and incidence of white-tailed deer- (Odocoileus virginianus) related auto collisions. Using county level data from 1994 to 2003 in Alabama, we tested several data models with the above mentioned factors …
Comment On "Ideal Capacitor Circuits And Energy Conservation" By K. Mita And M. Boufaida [Am. J. Phys. 67 (8), 737-739 (1999)], Asim Gangopadhyaya, Jeffrey Mallow
Comment On "Ideal Capacitor Circuits And Energy Conservation" By K. Mita And M. Boufaida [Am. J. Phys. 67 (8), 737-739 (1999)], Asim Gangopadhyaya, Jeffrey Mallow
Asim Gangopadhyaya
No abstract provided.
Using Gis Network Analyst To Identify Suppliers For A Produce Co-Op In Waterville, Me, Bethany Darling, Jamie O'Connell
Using Gis Network Analyst To Identify Suppliers For A Produce Co-Op In Waterville, Me, Bethany Darling, Jamie O'Connell
Jamie O'Connell
No abstract provided.
Impact Of Heme Reconstitution On The Spectroscopic Properties And Dna Binding Activity Of The H82a Variant Of The Carbon Monoxide-Sensing Heme Transcription Factor, Cooa, Rachel Troester, Robert Clark
Impact Of Heme Reconstitution On The Spectroscopic Properties And Dna Binding Activity Of The H82a Variant Of The Carbon Monoxide-Sensing Heme Transcription Factor, Cooa, Rachel Troester, Robert Clark
Robert Clark
CooA is a gas-sensing heme protein that regulates the expression of genes responsible for growth by carbon monoxide (CO) in several bacteria. CO binding to the CooA heme groups results in an allosteric conformation change that initiates the protein’s DNA binding function. All known CooA homologs have a conserved histidine residue that i) acts as the proximal heme ligand and ii) istrans to CO. Together with the results from mutagenesis studies, this observation suggests the presence of a proximal histidine ligand is required for CooA’s DNA-binding activity. However, since mutants lacking this His have been observed to lose heme …
Semiclassical Approach To Quantum-Mechanical Problems With Broken Supersymmetry, Ranabir Dutt, Asim Gangopadhyaya, Avinash Khare, A. Pagnamenta, Uday Sukhatne
Semiclassical Approach To Quantum-Mechanical Problems With Broken Supersymmetry, Ranabir Dutt, Asim Gangopadhyaya, Avinash Khare, A. Pagnamenta, Uday Sukhatne
Asim Gangopadhyaya
The semiclassical WKB approximation method is reexamined in the context of nonrelativistic quantum-mechanical bound-state problems with broken supersymmetry (SUSY). This gives rise to an alternative quantization condition (denoted by BSWKB) which is different from the standard WKB formula and also different from the previously studied supersymmetric (SWKB) formula for unbroken SUSY. It is shown that to leading order in ħ, the BSWKB condition yields exact energy eigenvalues for shape-invariant potentials with broken SUSY (harmonic oscillator, Pöschl-Teller I and II) which are known to be analytically solvable. Further, we show explicitly that the higher-order corrections to these energy eigenvalues, up to …
Reasoning With Design Rationale, Janet Burge, David Brown
Reasoning With Design Rationale, Janet Burge, David Brown
David C. Brown
Design Rationale (DR) consists of the decisions made during the design process and the reasons behind them. Because it offers more than just a “snapshot” of the final design decisions, DR is invaluable as an aid for revising, maintaining, documenting, evaluating, and learning the design. Much work has been performed on how DR can be captured and represented but not as much on how it can be used. In this paper, we investigate the use of DR by building InfoRat, a system that inferences over a design’s rationale in order to detect inconsistencies and to assess the impact of changes.
Renormalization Group Equations In Broken Supersymmetric Theories Using Superspace Methods, Asim Gangopadhyaya, Darwin Chang
Renormalization Group Equations In Broken Supersymmetric Theories Using Superspace Methods, Asim Gangopadhyaya, Darwin Chang
Asim Gangopadhyaya
We apply the superfield method with the spurion technique to derive the renormalization-group equations in broken supersymmetric theories. We point out some possible ambiguities in this procedure and show that it is in general necessary to express the supersymmetry-breaking terms in explicit D-type form. We also found that it is possible to construct broken supersymmetric theories where some of the symmetry-breaking parameters do not receive any infinite renormalization.
Tradeoffs Between Energy And Security In Wireless Networks, Fernando Colón Osorio, Emmanuel Agu, Kerry Mckay
Tradeoffs Between Energy And Security In Wireless Networks, Fernando Colón Osorio, Emmanuel Agu, Kerry Mckay
Emmanuel O. Agu
In recent years, several researchers have studied the vulnerabilities present in the encryption protocols and authentication mechanisms associated with 802.11-based networks. This research has led to the creation of protocol extensions and replacement proposals such as WPA, 802.11i, and 802.1X. In addition, Denial of Service attacks that can be launched against 802.11-based networks, with relative ease and impunity, have been studied. Simultaneously, researchers studying the limitations of wireless networks have turned their attention to one of the inherent limitation of wireless devices, namely, power consumption. Research in this area has been focused in understanding the impact of the network interface …
Comment On ‘‘The Hidden Symmetry For A Quantum System With An Infinitely Deep Square-Well Potential By Shi-Hai Dong And Zhong-Qi Ma [Am. J. Phys. 70 (5) 520-521 (2002)], Asim Gangopadhyaya, Jeffrey Mallow
Comment On ‘‘The Hidden Symmetry For A Quantum System With An Infinitely Deep Square-Well Potential By Shi-Hai Dong And Zhong-Qi Ma [Am. J. Phys. 70 (5) 520-521 (2002)], Asim Gangopadhyaya, Jeffrey Mallow
Asim Gangopadhyaya
No abstract provided.
Gas-Binding Studies Of The Carbon Monoxide Sensor, Cooa, Joshua Wagoner, Lindsey Dillingham, Robert Clark
Gas-Binding Studies Of The Carbon Monoxide Sensor, Cooa, Joshua Wagoner, Lindsey Dillingham, Robert Clark
Robert Clark
CooA is a carbon monoxide-sensing (CO-sensing) heme protein transcription factor that regulates gene activation in several bacteria and is a convenient model for studying analogous proteins in the human body. The goal of this study is to understand the specificity and mechanism of gas binding of CooA. To accomplish this, wild type CooA and selected protein variants were purified and then reacted with different diatomic gas molecules. The resulting species were characterized by UV-Visible and fluorescence spectroscopy.
Preliminary Design Of A High Tc Superconducting Persistent Mode Current Switch, Christopher Hawley, Dominic Cuiuri, Steve Gower
Preliminary Design Of A High Tc Superconducting Persistent Mode Current Switch, Christopher Hawley, Dominic Cuiuri, Steve Gower
Dominic Cuiuri
Persistent Mode Current Switches (PMCS) are made from coils of superconductor that in theory will provide zero conduction losses when closed. By causing a section of the superconductor to leave its superconducting state and become resistive, the switch is effectively opened. There are currently 3 methods to open a PMCS; 1) applying heat, 2) applying a magnetic field or 3) application of current above the critical current (Ic) of the tape. The first two methods are not suitable for power applications as the switching time is too slow. Recent work at the University of Wollongong and in literature has shown …
Characterizing The Performance And Behaviors Of Runners Using Twitter, Qian He, Emmanuel Agu, Diane Strong, Bengisu Tulu, Peder Pedersen
Characterizing The Performance And Behaviors Of Runners Using Twitter, Qian He, Emmanuel Agu, Diane Strong, Bengisu Tulu, Peder Pedersen
Emmanuel O. Agu
Running is a popular physical activity that improves physical and mental wellbeing. Unfortunately, up-to- date information about runners’ performance and psychological wellbeing is limited. Many questions remain unanswered, such as how far and how fast runners typically run, their preferred running times and frequencies, how long new runners persist before dropping out, and what factors cause runners to quit. Without hard data, establishing patterns of runner behavior and mitigating the challenges they face are difficult. Collecting data manually from large numbers of runners for research studies is costly and time consuming. Emerging Social Networking Services (SNS) and fitness tracking devices …