Open Access. Powered by Scholars. Published by Universities.®

Physics Commons

Open Access. Powered by Scholars. Published by Universities.®

Selected Works

Physics

Discipline
Publication Year
Publication
File Type

Articles 1 - 30 of 175

Full-Text Articles in Physics

Physics Professor Receives $250k From Nsf To Help Advance Climate Science Oct 2019

Physics Professor Receives $250k From Nsf To Help Advance Climate Science

Frank Robinson

Sacred Heart University has received $252,060 from the National Science Foundation (NSF) to help advance climate science. This grant will help fund an undergraduate physics research program introducing juniors and seniors to cutting-edge scientific research, intended to bridge major gaps in climate modeling.


Ucna/Ucna+, Robert Pattie Aug 2019

Ucna/Ucna+, Robert Pattie

Robert W. Pattie Jr.

The neutron provides a simple yet dynamic nuclear system to study the Standard Model of Particle Physics. The process of transforming a neutron into a proton, an electron, and an anti-neutrino contains a wealth of information in the decay rate and the kinematics of the emitted particles. Precision measurements of angular correlations in neutron β-decay can lend insight to the structure of the weak interaction and probe for physics beyond the Standard Model. The UCNA experiment at the Los Alamos Neutron Science Center is the only experiment to use ultracold neutrons to perform such a measurement, determining the β-asymmetry parameter ...


Directional Limits On Persistent Gravitational Waves Using Ligo S5 Science Data, J. Abadie, Marco Cavaglia Jan 2019

Directional Limits On Persistent Gravitational Waves Using Ligo S5 Science Data, J. Abadie, Marco Cavaglia

Marco Cavaglia

The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2 - 20 x 10-50 strain2 Hz-1 and 5 - 35 x 10-49 strain2Hz-1sr-1 for pointlike and extended sources, respectively. The latter result is the first ...


Temperaments And Learning Styles Vs. Academic Performance Of First-Semester Physics Students, Shel Randall Jul 2018

Temperaments And Learning Styles Vs. Academic Performance Of First-Semester Physics Students, Shel Randall

Shel Randall

Purpose: The purpose of this retrospective quantitative correlational study was to determine the relationship of student temperament (as measured by the online Jung Typology Test) and learning styles (as measured by the Felder-Soloman Index of Learning Styles) to academic performance of first-semester physics students while enrolled in a Sierra Community College Physics Department course during the 2014 – 2016 school years
Methodology: This is a retrospective quantitative correlational study of the relationship between student personality information self-reported by survey and student performance as measured by semester grades. The historical survey data consists of results from two online assessments: the JTT (measuring ...


Electronic Structure Of Superconducting Mgb2 And Related Binary And Ternary Borides, Nadezhda I. Medvedeva, Alexander L. Ivanovskii, Julia E. Medvedeva, Arthur J. Freeman Feb 2018

Electronic Structure Of Superconducting Mgb2 And Related Binary And Ternary Borides, Nadezhda I. Medvedeva, Alexander L. Ivanovskii, Julia E. Medvedeva, Arthur J. Freeman

Julia E. Medvedeva

First-principles full potential linear muffin-tin orbital-generalized gradient approximation electronic structure calculations of the new medium-Tc superconductor (MTSC) MgB2 and related diborides indicate that superconductivity in these compounds is related to the existence of Px,y-band holes at the γ point. Based on these calculations, we explain the absence of medium-Tc superconductivity for BeB2, AlB2, ScB2, and YB2. The simulation of a number of MgB2-based ternary systems using a supercell approach demonstrates that (i) the electron doping of MgB2 (i.e., MgB2-yXy with X=Be, C ...


Comparing Experts And Novices In Solving Electrical Circuit Problems With The Help Of Eye-Tracking, David Rosengrant, Colin Thomson, Taha Mzoughi Jul 2017

Comparing Experts And Novices In Solving Electrical Circuit Problems With The Help Of Eye-Tracking, David Rosengrant, Colin Thomson, Taha Mzoughi

David Rosengrant

In order to help introductory physics students understand and learn to solve problems with circuits, we must first understand how they differ from experts. This preliminary study focuses on problem-solving dealing with electrical circuits. We investigate difficulties novices have with circuits and compare their work with those of experts. We incorporate the use of an eye-tracker to investigate any possible differences or similarities on how experts and novices solve electrical circuit problems. Our results show similarities in gaze patterns among all subjects on the components of the circuit. We further found that experts would look back at the circuit while ...


Pre-Service Physics Teachers And Physics Education Research, David Rosengrant Jul 2017

Pre-Service Physics Teachers And Physics Education Research, David Rosengrant

David Rosengrant

Training pre-service teachers requires, among other things, content knowledge, pedagogical skills and pedagogical content knowledge. Teacher preparation programs have little, if any spare time to add more courses/activities to their program. However, I argue in this paper that we, as educators, must enhance the amount of physics education research in our pre-service physics teacher training programs. In this study, I analyze the results of two different types of exposure to physics education research (PER) from two different groups of pre-service physics teachers in our masters of arts and teaching program. The preliminary results show, for example that the PER ...


A Simple Electric Field Probe In A Gauss's Law Laboratory, Daniel O. Ludwigsen, Gregory N. Hassold May 2017

A Simple Electric Field Probe In A Gauss's Law Laboratory, Daniel O. Ludwigsen, Gregory N. Hassold

Gregory Hassold

Early in our calculus-based introductory course, students are introduced to electric fields and sometimes struggle with the abstraction of a vector field. They have less familiarity with the phenomena associated with electric fields, and the connection between phenomena and mathematical formalism is weaker. Our very next topic is Gauss's law.


Vector Acoustic Intensity Around A Tuning Fork, Daniel A. Russell, Justin Junell, Daniel O. Ludwigsen May 2017

Vector Acoustic Intensity Around A Tuning Fork, Daniel A. Russell, Justin Junell, Daniel O. Ludwigsen

Daniel Ludwigsen

The acoustic intensity vector field around a tuning fork is investigated. Theory for a longitudinal quadrupole source predicts a well-defined transition between near-field and far-field, with significant circulation of sound energy in the near-field. Vector components of the time-averaged intensity were measured using a two-microphone intensity probe and found to agree well with predictions from theory. The vector intensity map is interpreted, and shown to provide useful information about the near-field of an acoustic source.


A Simple Electric Field Probe In A Gauss's Law Laboratory, Daniel O. Ludwigsen, Gregory N. Hassold May 2017

A Simple Electric Field Probe In A Gauss's Law Laboratory, Daniel O. Ludwigsen, Gregory N. Hassold

Daniel Ludwigsen

Early in our calculus-based introductory course, students are introduced to electric fields and sometimes struggle with the abstraction of a vector field. They have less familiarity with the phenomena associated with electric fields, and the connection between phenomena and mathematical formalism is weaker. Our very next topic is Gauss's law.


Supersymmetry And The Tunneling Problem In An Asymmetric Double Well, Asim Gangopadhyaya, Prasanta Panigrahi, Uday Sukhatne Dec 2015

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.


Photoelectron Spectroscopy And Theoretical Studies Of [Com(Pyrene)N]− (M=1,2 And N=1,2) Complexes, Anil Kandalam, Puru Jena, Xiang Li, Soren Eustis, Kit Bowen Nov 2015

Photoelectron Spectroscopy And Theoretical Studies Of [Com(Pyrene)N]− (M=1,2 And N=1,2) Complexes, Anil Kandalam, Puru Jena, Xiang Li, Soren Eustis, Kit Bowen

Anil K. Kandalam

No abstract provided.


Electron Tunneling Characteristics Of A Cubic Quantum Dot, (Pbs)32, Sanjeev Gupta, Haiying He, Douglas Banyai, Anil Kandalam, Ravindra Pandey Nov 2015

Electron Tunneling Characteristics Of A Cubic Quantum Dot, (Pbs)32, Sanjeev Gupta, Haiying He, Douglas Banyai, Anil Kandalam, Ravindra Pandey

Anil K. Kandalam

No abstract provided.


Superhalogen Properties Of Cumcln Clusters: Theory And Experiment, Y. Ko, H. Wang, K. Pradhan, P. Koirala, Anil Kandalam, K. Bowen, P. Jena Nov 2015

Superhalogen Properties Of Cumcln Clusters: Theory And Experiment, Y. Ko, H. Wang, K. Pradhan, P. Koirala, Anil Kandalam, K. Bowen, P. Jena

Anil K. Kandalam

No abstract provided.


Reactivity Of Neutral And Charged B13 Clusters With O2: A Theoretical Study, William Slough, Anil Kandalam, Ravindra Pandey Nov 2015

Reactivity Of Neutral And Charged B13 Clusters With O2: A Theoretical Study, William Slough, Anil Kandalam, Ravindra Pandey

Anil K. Kandalam

No abstract provided.


Al6h18: A Baby Crystal Of Γ -Alh3, B. Kiran, Anil Kandalam, Jing Xu, Y. Ding, M. Sierka, K. Bowen, H. Schnöckel Nov 2015

Al6h18: A Baby Crystal Of Γ -Alh3, B. Kiran, Anil Kandalam, Jing Xu, Y. Ding, M. Sierka, K. Bowen, H. Schnöckel

Anil K. Kandalam

No abstract provided.


(Pbs)32: A Baby Crystal, B. Kiran, Anil Kandalam, Rameshu Rallabandi, Pratik Koirala, Xiang Li, Xin Tang, Yi Wang, Howard Fairbrother, Gerd Gantefoer, Kit Bowen Nov 2015

(Pbs)32: A Baby Crystal, B. Kiran, Anil Kandalam, Rameshu Rallabandi, Pratik Koirala, Xiang Li, Xin Tang, Yi Wang, Howard Fairbrother, Gerd Gantefoer, Kit Bowen

Anil K. Kandalam

No abstract provided.


Photoelectron Spectroscopy Of Boron Aluminum Hydride Cluster Anions, Haopeng Wang, Xinxing Zhang, Yeon Ko, Gerd Gantefoer, Kit Bowen, Xiang Li, Boggavarapu Kiran, Anil Kandalam Nov 2015

Photoelectron Spectroscopy Of Boron Aluminum Hydride Cluster Anions, Haopeng Wang, Xinxing Zhang, Yeon Ko, Gerd Gantefoer, Kit Bowen, Xiang Li, Boggavarapu Kiran, Anil Kandalam

Anil K. Kandalam

No abstract provided.


Communications: Chain And Double-Ring Polymeric Structures: Observation Of Alnh3n+1 − (N=4–8) And Al4h14 −, Xiang Li, Andrej Grubisic, Kit Bowen, Anil Kandalam, Boggavarapu Kiran, Gerd Gantefoer, Puru Jena Nov 2015

Communications: Chain And Double-Ring Polymeric Structures: Observation Of Alnh3n+1 − (N=4–8) And Al4h14 −, Xiang Li, Andrej Grubisic, Kit Bowen, Anil Kandalam, Boggavarapu Kiran, Gerd Gantefoer, Puru Jena

Anil K. Kandalam

No abstract provided.


Photoelectron Spectroscopic And Theoretical Studies Of Fem − (Coronene)N (M=1,2, N=1,2) Complexes, Xiang Li, Soren Eustis, Kit Bowen, Anil Kandalam, Puru Jena Nov 2015

Photoelectron Spectroscopic And Theoretical Studies Of Fem − (Coronene)N (M=1,2, N=1,2) Complexes, Xiang Li, Soren Eustis, Kit Bowen, Anil Kandalam, Puru Jena

Anil K. Kandalam

No abstract provided.


Hydrogen Storage And The 18-Electron Rule, Boggavarapu Kiran, Anil Kandalam, Puru Jena Nov 2015

Hydrogen Storage And The 18-Electron Rule, Boggavarapu Kiran, Anil Kandalam, Puru Jena

Anil K. Kandalam

No abstract provided.


Geometry And Electronic Structure Of Vn(Bz)M Complexes, Anil Kandalam, B. Rao, Puru Jena Nov 2015

Geometry And Electronic Structure Of Vn(Bz)M Complexes, Anil Kandalam, B. Rao, Puru Jena

Anil K. Kandalam

No abstract provided.


Structure And Stability Of Con(Pyridine)M − Clusters: Absence Of Metal Inserted Structures, B. Edmonds, Anil Kandalam, S. Khanna, X. Li, A. Grubisic, I. Khanna, K. Bowen Nov 2015

Structure And Stability Of Con(Pyridine)M − Clusters: Absence Of Metal Inserted Structures, B. Edmonds, Anil Kandalam, S. Khanna, X. Li, A. Grubisic, I. Khanna, K. Bowen

Anil K. Kandalam

No abstract provided.


Ground State Structures And Photoelectron Spectroscopy Of [Com(Coronene)]− Complexes, Anil Kandalam, Boggavarapu Kiran, Puru Jena, Xiang Li, Andrej Grubisic, Kit Bowen Nov 2015

Ground State Structures And Photoelectron Spectroscopy Of [Com(Coronene)]− Complexes, Anil Kandalam, Boggavarapu Kiran, Puru Jena, Xiang Li, Andrej Grubisic, Kit Bowen

Anil K. Kandalam

No abstract provided.


Structures And Photoelectron Spectroscopy Of Cun(Bo2)M− (N, M = 1, 2) Clusters: Observation Of Hyperhalogen Behavior, Yuan Feng, Hong-Guang Xu, Weijun Zheng, Hongmin Zhao, Anil Kandalam, Puru Jena Nov 2015

Structures And Photoelectron Spectroscopy Of Cun(Bo2)M− (N, M = 1, 2) Clusters: Observation Of Hyperhalogen Behavior, Yuan Feng, Hong-Guang Xu, Weijun Zheng, Hongmin Zhao, Anil Kandalam, Puru Jena

Anil K. Kandalam

No abstract provided.


Photoelectron Spectroscopic Study Of The Anionic Transition Metalorganic Complexes [Fe1,2(Cot)]− And [C(Cot)]−, Xiang Li, Soren Eustis, Kit Bowen, Anil Kandalam Nov 2015

Photoelectron Spectroscopic Study Of The Anionic Transition Metalorganic Complexes [Fe1,2(Cot)]− And [C(Cot)]−, Xiang Li, Soren Eustis, Kit Bowen, Anil Kandalam

Anil K. Kandalam

No abstract provided.


Structural Evolution And Stabilities Of Neutral And Anionic Clusters Of Lead Sulfide: Joint Anion Photoelectron And Computational Studies, Pratik Koirala, Boggavarapu Kiran, Anil Kandalam, Charles Fancher, Helen De Clercq, Xiang Li, Kit Bowen Nov 2015

Structural Evolution And Stabilities Of Neutral And Anionic Clusters Of Lead Sulfide: Joint Anion Photoelectron And Computational Studies, Pratik Koirala, Boggavarapu Kiran, Anil Kandalam, Charles Fancher, Helen De Clercq, Xiang Li, Kit Bowen

Anil K. Kandalam

No abstract provided.


Photoelectron Spectroscopic Study Of Iron-Pyrene Cluster Anions, Xiang Li, Kit Bowen, Puru Jena, Anil Kandalam Nov 2015

Photoelectron Spectroscopic Study Of Iron-Pyrene Cluster Anions, Xiang Li, Kit Bowen, Puru Jena, Anil Kandalam

Anil K. Kandalam

No abstract provided.


Structure And Bonding Of Au5m (M=Na, Mg, Al, Si, P, And S) Clusters, Chiranjib Majumder, Anil Kandalam, Puru Jena Nov 2015

Structure And Bonding Of Au5m (M=Na, Mg, Al, Si, P, And S) Clusters, Chiranjib Majumder, Anil Kandalam, Puru Jena

Anil K. Kandalam

The atomic and electronic structure of Au5M (M=Na, Mg, Al, Si, P, S, and Au) clusters have been investigated using generalized gradient approximation to the density functional theory. Depending on the nature of interaction with different impurity elements a structural transition from planar to nonplanar configuration has been observed in Au5M. With the exception of S, impurities with p electrons (Al, Si, P) yield nonplanar geometries of Au5M clusters, while those with selectrons (Na, Mg) yield planar geometries. The properties of Au5Scluster are anomalous: The cluster not only has a planar geometry, but also is chemically most stable with ...


The Viability Of Aluminum Zintl Anion Moieties Within Magnesium-Aluminum Clusters, Haopeng Wang, Yeon Jae Ko, Xinxing Zhang, Gerd Gantefoer, Hansgeorg Schnoeckel, Bryan Eichhorn, Puru Jena, Boggavarapu Kiran, Anil Kandalam, Kit Bowen Nov 2015

The Viability Of Aluminum Zintl Anion Moieties Within Magnesium-Aluminum Clusters, Haopeng Wang, Yeon Jae Ko, Xinxing Zhang, Gerd Gantefoer, Hansgeorg Schnoeckel, Bryan Eichhorn, Puru Jena, Boggavarapu Kiran, Anil Kandalam, Kit Bowen

Anil K. Kandalam

Through a synergetic combination of anion photoelectron spectroscopy and density functional theory based calculations, we have investigated the extent to which the aluminum moieties within selected magnesium-aluminum clusters are Zintl anions. Magnesium-aluminum cluster anions were generated in a pulsed arc discharge source. After mass selection, photoelectron spectra of Mg m Al n (m, n = 1,6; 2,5; 2,12; and 3,11) were measured by a magnetic bottle, electron energy analyzer. Calculations on these four stoichiometries provided geometric structures and full charge analyses for the cluster anions and their neutral cluster counterparts, as well as photodetachment transition energies (stick ...