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Elasticity Of Cylindrical Black Holes, Conrad Pearson 2016 California Polytechnic State University, San Luis Obispo

Elasticity Of Cylindrical Black Holes, Conrad Pearson

Physics

Black holes are regions of strong gravity, and are often regarded as behaving like drops of fluid. When this line of thought is applied to cylindrical black holes (black cylinders), a mapping can be made between known instabilities for black cylinders and ordinary fluid cylinders. However, this known correlation is increasingly less accurate for lower spatial dimensions, and I seek to correct this discrepancy in this thesis. By considering soft solids instead of pure fluids, elastic energy can be included, which brings us closer to a direct comparison. In improving this mapping, it becomes possible to better understand the behavior ...


Photonic Crystals With Alternate Arrays Of Rods And Holes In A Low Dielectric-Index Material, Dimitar L. Dimitrov 2016 Graduate Center, City University of New York

Photonic Crystals With Alternate Arrays Of Rods And Holes In A Low Dielectric-Index Material, Dimitar L. Dimitrov

All Graduate Works by Year: Dissertations, Theses, and Capstone Projects

This thesis theoretically deals with the propagation of electromagnetic waves (light beams) in periodically modulated dielectric material structures based on Maxwell’s equations. We are interested in novel light propagation characteristics in these man-made dielectric material structures for practical applications, especially on optical communications and computations. Since the wavelength range of light is on the same order of magnitude as the modulation periods of dielectric materials, an analogy of the light propagation in dielectric-constant modulated structures with the electron transport in solid-state crystals is used throughout my thesis by using a term “photonic crystals (PhCs)” referring to these dielectric structures ...


Vibrational And Structural Signatures Of The Crossover Between Dense Glassy And Sparse Gel-Like Attractive Colloidal Packings, Matthew A. Lohr, Tim Still, Raman Ganti, Matthew D. Gratale, Zoey S. Davidson, Kevin B. Aptowicz, Carl P. Goodrich, Daniel M. Sussman, A. G. Yodh 2016 University of Pennsylvania

Vibrational And Structural Signatures Of The Crossover Between Dense Glassy And Sparse Gel-Like Attractive Colloidal Packings, Matthew A. Lohr, Tim Still, Raman Ganti, Matthew D. Gratale, Zoey S. Davidson, Kevin B. Aptowicz, Carl P. Goodrich, Daniel M. Sussman, A. G. Yodh

Kevin Aptowicz

We investigate the vibrational modes of quasi-two-dimensional disordered colloidal packings of hard colloidal spheres with short-range attractions as a function of packing fraction. Certain properties of the vibrational density of states (vDOS) are shown to correlate with the density and structure of the samples (i.e., in sparsely versus densely packed samples). Specifically, a crossover from dense glassy to sparse gel-like states is suggested by an excess of phonon modes at low frequency and by a variation in the slope of the vDOS with frequency at low frequency. This change in phonon mode distribution is demonstrated to arise largely from ...


Dango (Doings And Goings On) - Vol. 22 | Issue 10, Rusty Towell, Cecily Towell, Haley Stien, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Paul Carstens, Joshua Daniel Martinez, Reuben Byrd, Mike Daugherity, Donald Isenhower 2016 Abilene Christian University

Dango (Doings And Goings On) - Vol. 22 | Issue 10, Rusty Towell, Cecily Towell, Haley Stien, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Paul Carstens, Joshua Daniel Martinez, Reuben Byrd, Mike Daugherity, Donald Isenhower

DANGO

ACU department of Engineering and Physics Weekly Summer Research Newsletter


Preparation Of Phase Homogeneous Mn-Zn Ferrite Powder By Spray Pyrolysis, Xinyu Zhao, Baicun Zheng, Hongchen Gu, Chunzhong Li, Shi C. Zhang, P. D. Ownby 2016 Missouri University of Science and Technology

Preparation Of Phase Homogeneous Mn-Zn Ferrite Powder By Spray Pyrolysis, Xinyu Zhao, Baicun Zheng, Hongchen Gu, Chunzhong Li, Shi C. Zhang, P. D. Ownby

P. Darrell Ownby (Emeritus)

Two kinds of aqueous precursor solutions are used to synthesize Mn-Zn ferrite powders: (i) nitrate (NO) precursor-derived from solutions of Mn(NO3)2, Zn(NO3)2, and Fe(NO3)3; and (ii) acetate (AC) precursor-derived from solutions of Mn(CH3COOO)2, Zn(CHCH3COOO)2, and Fe(NO3)3. The composition of the powders synthesized from the precursor AC is very uniform, whereas powders derived from the precursor NO have Mn and Zn segregated on the particle surfaces. In addition, the powders synthesized from precursor AC are solid spherical particles with fine porosity ...


Dango (Doings And Goings On) - Vol. 22 | Issue 9, Rusty Towell, Matthew Kimball, Haley Stien, Cecily Towell, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity, Donald Isenhower 2016 Abilene Christian University

Dango (Doings And Goings On) - Vol. 22 | Issue 9, Rusty Towell, Matthew Kimball, Haley Stien, Cecily Towell, Aric Tate, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity, Donald Isenhower

DANGO

ACU Department of Engineering and Physics Weekly Summer Research Newsletter


Volume Holographic Recording And Readout For 90-Deg Geometry, Partha P. Banerjee, Monish Ranjan Chatterjee, Nickolai Kukhtarev, Tatiana Kukhtareva 2016 University of Dayton

Volume Holographic Recording And Readout For 90-Deg Geometry, Partha P. Banerjee, Monish Ranjan Chatterjee, Nickolai Kukhtarev, Tatiana Kukhtareva

Monish R. Chatterjee

When a prerecorded cross-beam hologram is reconstructed (so-called edge-lit readout) with a uniform plane wave and a point source, the resulting exact solutions reveal Bessel-function-type diffracted beam profiles, which are fundamentally modified under weak propagational diffraction. The case of a profiled beam readout with propagational diffraction may be analyzed using a transfer function approach based on 2-D Laplace transforms. In a second series of investigations, dynamic readout from a cross-beam volume hologram recorded with two orthogonal uniform plane waves is considered for various dependences of the refractive index modulation with intensity. Typically, refractive index profiles that are proportional to the ...


Instrumentation Of A Self-Correcting Data Acquisition System For Ultrafast Lasers, Fabricio S. Marin 2016 DePaul University

Instrumentation Of A Self-Correcting Data Acquisition System For Ultrafast Lasers, Fabricio S. Marin

DePaul Discoveries

Optical phenomenon in semiconductors and other light-sensitive materials typically happen at very short time durations, and require instruments capable of measuring time resolutions on the order of nanoseconds to femtoseconds. Electronics can only measure up to nanosecond-time lengths. The purpose of this summer research project is to design a system capable of achieving variable time delays with resolutions up to femtosecond range to use in time-resolved experiments with the pump-probe technique. The time delay is achieved using a delay stage driven by a micro stepper-motor which moves in variable increments while an encoder counts the steps and tells a computer ...


Wavelet Packet Analysis Of Amino Acid Chain Sequences In The Proteins Of Mesophile And Thermophile Bacteria, John B. Linehan 2016 DePaul University

Wavelet Packet Analysis Of Amino Acid Chain Sequences In The Proteins Of Mesophile And Thermophile Bacteria, John B. Linehan

DePaul Discoveries

In this project, proteins from mesophile and thermophile bacteria with similar functions are compared. Initially it is assumed that the differences between these two bacteria are substantial to be recognized in the amino acid sequences of their proteins. These differences would then lead to the creation of a statistical measure, which would allow the classification of a protein to its corresponding bacteria. By assigning hydrophobicity values from three well-known scales, a discrete numeric signal is produced for each protein, which is analyzed using wavelet packets. The result of this method indicates that the overall hydrophobic tendencies of these two bacteria ...


Multistart Spiral Electron Vortices In Ionization By Circularly Polarized Uv Pulses, Jean Marcel Ngoko Djiokap, Alexei V. Meremianin, N. L. Manakov, S. X. Hu, L. B. Madsen, Anthony F. Starace 2016 University of Nebraska-Lincoln

Multistart Spiral Electron Vortices In Ionization By Circularly Polarized Uv Pulses, Jean Marcel Ngoko Djiokap, Alexei V. Meremianin, N. L. Manakov, S. X. Hu, L. B. Madsen, Anthony F. Starace

Anthony F. Starace Publications

Multistart spiral vortex patterns are predicted for the electron momentum distributions in the polarization plane following ionization of the helium atom by two time-delayed circularly polarized ultrashort laser pulses. For two ultraviolet (UV) pulses having the same frequency (such that two photons are required for ionization), single-color two-photon interferometry with corotating or counter-rotating time-delayed pulses is found to lead respectively to zero-start or four-start spiral vortex patterns in the ionized electron momentum distributions in the polarization plane. In contrast, two-color one-photon plus two-photon interferometry with time-delayed corotating or counter-rotating UV pulses is found to lead respectively to one ...


Observations Of High Vibrational Levels Of The 4fσ 41Σ+ U State Of H2, Alexander M. Chartrand, Robert C. Ekey Jr., Elizabeth F. McCormack 2016 Bryn Mawr College

Observations Of High Vibrational Levels Of The 4fσ 41Σ+ U State Of H2, Alexander M. Chartrand, Robert C. Ekey Jr., Elizabeth F. Mccormack

Physics Faculty Research and Scholarship

Resonantly enhanced multiphoton ionization via the EF 1Σg+, v′ = 6 double-well state has been used to probe the energy region below the third dissociation limit of H2 where several high vibrational levels of the 41Σu+ state are expected. Theoretical ab initio potential energy curves for this state predict a deep inner well and shallow outer well where vibrational levels above v = 8 are expected to exhibit the double-well character of the state. Since the 41Σu+ state has f-state character, transitions to it from the ground state are nominally forbidden. However ...


Dango (Doings And Goings On) - Vol. 22 | Issue 8, Matthew Kimball, Cecily Towell, Haley Stien, Rusty Towell, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity 2016 Abilene Christian University

Dango (Doings And Goings On) - Vol. 22 | Issue 8, Matthew Kimball, Cecily Towell, Haley Stien, Rusty Towell, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Paul Carstens, Reuben Byrd, Mike Daugherity

DANGO

Weekly Summer Research Newsletter


Dango (Doings And Goings On) - Vol. 22 | Issue 7, Matthew Kimball, Haley Stien, Aric Tate, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Paul Carstens, Joshua Daniel Martinez, Mike Daugherity, Reuben Byrd, Donald Isenhower 2016 Abilene Christian University

Dango (Doings And Goings On) - Vol. 22 | Issue 7, Matthew Kimball, Haley Stien, Aric Tate, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Paul Carstens, Joshua Daniel Martinez, Mike Daugherity, Reuben Byrd, Donald Isenhower

DANGO

Summer Research Newsletter for ACU's Engineering and Physics Department


Ogden College Of Science & Engineering Newsletter (Summer 2016), Cheryl Stevens, Dean 2016 Western Kentucky University

Ogden College Of Science & Engineering Newsletter (Summer 2016), Cheryl Stevens, Dean

Ogden College of Science & Engineering Publications

No abstract provided.


Calnexin, An Er-Induced Protein, Is A Prognostic Marker And Potential Therapeutic Target In Colorectal Cancer., Deborah Ryan, Steven Carberry, Áine C. Murphy, Andreas U. Lindner, Joanna Fay, Suzanne Hector, Niamh McCawley, Orna Bacon, Caoimhin G. Concannon, Elaine W. Kay, Deborah A. McNamara, Jochen HM Prehn 2016 Royal College of Surgeons in Ireland

Calnexin, An Er-Induced Protein, Is A Prognostic Marker And Potential Therapeutic Target In Colorectal Cancer., Deborah Ryan, Steven Carberry, Áine C. Murphy, Andreas U. Lindner, Joanna Fay, Suzanne Hector, Niamh Mccawley, Orna Bacon, Caoimhin G. Concannon, Elaine W. Kay, Deborah A. Mcnamara, Jochen Hm Prehn

Physiology and Medical Physics Articles

BACKGROUND: Colorectal cancer (CRC) is a leading cause of cancer mortality in the Western world and commonly treated with genotoxic chemotherapy. Stress in the endoplasmic reticulum (ER) was implicated to contribute to chemotherapeutic resistance. Hence, ER stress related protein may be of prognostic or therapeutic significance.

METHODS: The expression levels of ER stress proteins calnexin, calreticulin, GRP78 and GRP94 were determined in n = 23 Stage II and III colon cancer fresh frozen tumour and matched normal tissue samples. Data were validated in a cohort of n = 11 rectal cancer patients treated with radiochemotherapy in the neoadjuvant setting. The calnexin gene ...


Targeting Residential Energy Reduction For City Utilities Using Historical Electrical Utility Data And Readily Available Building Data, Kevin P. Hallinan, J. Kelly Kissock, Robert J. Brecha, Austin Mitchell 2016 University of Dayton

Targeting Residential Energy Reduction For City Utilities Using Historical Electrical Utility Data And Readily Available Building Data, Kevin P. Hallinan, J. Kelly Kissock, Robert J. Brecha, Austin Mitchell

Kevin Hallinan

Energy use data for the eight-year period 2003–2010 was analyzed for over 1200 single family residences in Village of Yellow Springs, Ohio. Electricity, natural gas, residential building, and weather databases are merged to permit determination of the energy intensity of each home in the village. The energy use intensity for each home is disaggregated into weather independent and weather dependent electric and natural gas use. This use is compared to typical baseline, cooling, and heating energy use for the region. From this comparison, priority homes are identified for energy reduction investment. Collective potential low cost energy reduction is estimated ...


Prioritizing Investment In Residential Energy Efficiency And Renewable Energy: A Case Study For The U.S. Midwest, Robert J. Brecha, Austin Mitchell, Kevin P. Hallinan, J. Kelly Kissock 2016 University of Dayton

Prioritizing Investment In Residential Energy Efficiency And Renewable Energy: A Case Study For The U.S. Midwest, Robert J. Brecha, Austin Mitchell, Kevin P. Hallinan, J. Kelly Kissock

Kevin Hallinan

Residential building energy use is an important contributor to greenhouse gas emissions and in the United States represents about 20% of total energy consumption. A number of previous macro-scale studies of residential energy consumption and energy-efficiency improvements are mainly concerned with national or international aggregate potential savings. In this paper we look into the details of how a collection of specific homes in one region might reduce energy consumption and carbon emissions, with particular attention given to some practical limits to what can be achieved by upgrading the existing residential building stock. Using a simple model of residential, single-family home ...


Cost-Availability Curves For Hierarchical Implementation Of Residential Energy-Efficiency Measures, Roman Villoria-Siegert, Philip Brodrick, Kevin P. Hallinan, Robert J. Brecha 2016 University of Dayton

Cost-Availability Curves For Hierarchical Implementation Of Residential Energy-Efficiency Measures, Roman Villoria-Siegert, Philip Brodrick, Kevin P. Hallinan, Robert J. Brecha

Kevin Hallinan

Historical residential electricity data and natural gas consumption data were collected for, respectively, 1,200 and 178 residences in a small town in the USA. These data were merged with local building and weather databases, and energy consumption models were developed for each residence, revealing substantial variation in heating and cooling intensity. After estimating approximate physical building characteristics, energy profiles for each residence were calculated, and savings from adoption of the most cost-effective energy-efficiency measures for each residence were estimated. Effectively, we wish to leverage commonly available data sets to infer characteristics of building envelopes and equipment, without the need ...


Model For Computing Kinetics Of The Graphene Edge Epitaxial Growth On Copper, Mikhail Khenner 2016 Western Kentucky University

Model For Computing Kinetics Of The Graphene Edge Epitaxial Growth On Copper, Mikhail Khenner

Mikhail Khenner

A basic kinetic model that incorporates a coupled dynamics of the carbon atoms and dimers on a copper
surface is used to compute growth of a single-layer graphene island. The speed of the island’s edge advancement
on Cu[111] and Cu[100] surfaces is computed as a function of the growth temperature and pressure. Spatially
resolved concentration profiles of the atoms and dimers are determined, and the contributions provided by these
species to the growth speed are discussed. Island growth under the conditions of a thermal cycling is studied.


Dango (Doings And Goings On) - Vol. 22 | Issue 6, Hannah Hamilton, Matthew Kimball, Aric Tate, Haley Stien, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Reuben Byrd, Paul Carstens, Mike Daugherity, Donald Isenhower 2016 Abilene Christian University

Dango (Doings And Goings On) - Vol. 22 | Issue 6, Hannah Hamilton, Matthew Kimball, Aric Tate, Haley Stien, Vicente Rojas, Caleb Hicks, Zhaojia Xi, Joshua Daniel Martinez, Reuben Byrd, Paul Carstens, Mike Daugherity, Donald Isenhower

DANGO

Weekly newsletter from ACU Physics and Engineering


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