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Dissipative Macroscopic Quantum Tunneling In Type-I Superconductors, Ricardo Zarzuela, Eugene M. Chudnovsky, Javier Tejada 2011 Universitat de Barcelona

Dissipative Macroscopic Quantum Tunneling In Type-I Superconductors, Ricardo Zarzuela, Eugene M. Chudnovsky, Javier Tejada

Publications and Research

We study macroscopic quantum tunneling of interfaces separating normal and superconducting regions in type-I superconductors. Mathematical model is developed, that describes dissipative quantum escape of a two-dimensional manifold from a planar potential well. It corresponds to, e.g., a current-driven quantum depinning of the interface from a grain boundary or from artificially manufactured pinning layer. Effective action is derived and instantons of the equations of motion are investigated. Crossover between thermal activation and quantum tunneling is studied and the crossover temperature is computed. Our results, together with recent observation of non-thermal low-temperature magnetic relaxation in lead, suggest possibility of a ...


Differential Microlensing Measurements Of Quasar Broad-Line Kinematics In Q2237+0305, Matthew J. O'Dowd, N F. Bate, R L. Webster, R Wayth 2011 CUNY Lehman College

Differential Microlensing Measurements Of Quasar Broad-Line Kinematics In Q2237+0305, Matthew J. O'Dowd, N F. Bate, R L. Webster, R Wayth

Publications and Research

The detailed workings of the central engines of powerful quasars remain a mystery. This is primarily due to the fact that, at their cosmological distances, the inner regions of these quasars are spatially unresolvable. Reverberation mapping is now beginning to unlock the physics of the Broad Emission Line Region (BELR) in nearby, low-luminosity quasars, however it is still unknown whether this gas is dominated by virial motion, by outflows, or infall. The challenge is greater for more distant, powerful sources due to the very long response time of the BELR to changes in the continuum. We present a new technique ...


Modulation Spaces, Wiener Amalgam Spaces, And Brownian Motions, Árpád Bényi, Tadahiro Oh 2011 Western Washington University

Modulation Spaces, Wiener Amalgam Spaces, And Brownian Motions, Árpád Bényi, Tadahiro Oh

Mathematics

We study the local-in-time regularity of the Brownian motion with respect to localized variants of modulation spaces Msp,q and Wiener amalgam spaces Wsp,q. We show that the periodic Brownian motion belongs locally in time to Msp,q(T) and Wsp,q(T) for (s−1)q


Impulse-Momentum Diagrams, David Rosengrant 2011 Kennesaw State University

Impulse-Momentum Diagrams, David Rosengrant

Faculty Publications

Multiple representations are a valuable tool to help students learn and understand physics concepts. Furthermore, representations help students learn how to think and act like real scientists. These representations include: pictures, free‐body diagrams, energy bar charts, electrical circuits, and, more recently, computer simulations and animations. However, instructors have limited choices when they want to help their students understand impulse and momentum. One of the only available options is the impulse‐momentum bar chart. The bar charts can effectively show the magnitude of the momentum as well as help students understand conservation of momentum, but they do not easily show ...


On Weighted Distributions And Mean Advantage Over Inferiors Functions, Broderick O. Oluyede, Norou Diawara 2011 Georgia Southern University

On Weighted Distributions And Mean Advantage Over Inferiors Functions, Broderick O. Oluyede, Norou Diawara

Mathematical Sciences Faculty Publications

In this note, some fundamental results including relationship be-tween weighted distribution functions and mean advantage over inferi-ors functions are established. Ordering of reliability and/or distribution functions via mean advantage over inferiors functions and related func-tions for parent and weighted reliability functions are presented. Some applications and examples are given.


Unified Analysis Of Kernel-Based Interior-Point Methods For P *(Κ)-Lcp, Goran Lesaja, C. Roos 2011 Georgia Southern University

Unified Analysis Of Kernel-Based Interior-Point Methods For P *(Κ)-Lcp, Goran Lesaja, C. Roos

Mathematical Sciences Faculty Publications

We present an interior-point method for the P∗(κ)-linear complementarity problem (LCP) that is based on barrier functions which are defined by a large class of univariate functions called eligible kernel functions. This class is fairly general and includes the classical logarithmic function and the self-regular functions, as well as many non-self-regular functions as special cases. We provide a unified analysis of the method and give a general scheme on how to calculate the iteration bounds for the entire class. We also calculate the iteration bounds of both long-step and short-step versions of the method for several specific eligible ...


Hybrid Proofs Of The Q-Binomial Theorem And Other Identities, Dennis Eichhorn, James McLaughlin, Andrew Sills 2011 University of California

Hybrid Proofs Of The Q-Binomial Theorem And Other Identities, Dennis Eichhorn, James Mclaughlin, Andrew Sills

Mathematical Sciences Faculty Publications

We give "hybrid" proofs of the q-binomial theorem and other identities. The proofs are "hybrid" in the sense that we use partition arguments to prove a restricted version of the theorem, and then use analytic methods (in the form of the Identity Theorem) to prove the full version.

We prove three somewhat unusual summation formulae, and use these to give hybrid proofs of a number of identities due to Ramanujan.

Finally, we use these new summation formulae to give new partition interpretations of the Rogers-Ramanujan identities and the Rogers-Selberg identities.


Networking Website For Artists, Keenan S. Staffieri 2011 University of Redlands

Networking Website For Artists, Keenan S. Staffieri

Undergraduate Honors Theses

ArtSmirk is a networking website designed for artists to promote and enhance their creative expression. This can be achieved by providing artists with a web application that lets them upload their work for others to comment, critique, or offer suggestions. Users of this web application can view other member profiles and galleries, while being able to manage their own. ArtSmirk takes advantage of Web 2.0 technologies such as AJAX for retrieving data from the webserver asynchronously. These approaches to development make the web application more responsive to used requests and the navigation more intuitive. Art Smirk has been designed ...


"Visual Asl": An American Sign Language Computer-Assisted Instruction Software, Heather Carter 2011 University of Redlands

"Visual Asl": An American Sign Language Computer-Assisted Instruction Software, Heather Carter

Undergraduate Honors Theses

Visual ASL is a computer-assisted instruction software for teaching beginner ASL (American Sign Language). The purpose of this software is to guide users through interactive lessons and quizzes in order to teach this language. In current state of the software, it covers material taught in a level one ASL class. It will teach similar content as the lessons from the ASL instruction book, Signing Naturally.


The Synthesis And Characterization Of Novel Ruthenium Terpyridine Complexes: Reactivity With Dna, Nicolette M. Jonkhoff 2011 University of Redlands

The Synthesis And Characterization Of Novel Ruthenium Terpyridine Complexes: Reactivity With Dna, Nicolette M. Jonkhoff

Undergraduate Honors Theses

Side effects associated with platinum-based anticancer therapies have resulted in the search for novel nonplatinum-based metal species. Among the different metal complexes generating interest, rutheniumII complexes have shown great potential as anticancer agents. A series of mixed ligand ruthenium complexes with he formula cis-[Ru(X)(HPB)(OH2)], where X corresponds to either (1) Terpy = 2,2':6',2"-terpyridine; (2) Pheterpy = 4' -Phenyl-2,2':6',2"-terpyridine or (3) Tterpy = 4'-Tolyl-2,2':6',2"-terpyridine, and HPB = 2-(2' -hydroxyphenyl)-benozoxazole, have been synthesized and structurally characterized. The DNA binding of the rutheniumII complexes has ...


Using Photo Id To Examine Injuries In Eastern Pacific Gray Whales: From Calving To Feeding Grounds And Along The Migratory Corridor, Laura Conner 2011 University of Redlands

Using Photo Id To Examine Injuries In Eastern Pacific Gray Whales: From Calving To Feeding Grounds And Along The Migratory Corridor, Laura Conner

Undergraduate Honors Theses

The Eastern Pacific population of gray whales (Eschrichtius robustus) migrates along the west coast of North America every year; this migration brings them into close contact with shipping lanes and fishing operations which present major anthropogenic (human caused) threats to gray whales. The purpose of this study is to use photo ID of the whales from their feeding and calving grounds, and their migratory corridor to study which body regions are susceptible to both natural and anthropogenic injury and examine the most common types of injury tot he whales. In order to do this, photos were collected from each location ...


Development Of Extraction And Gas Chromatographic Analysis Methods For Epicuticular Waxes From Canyon Live Oak Leaves (Quercus Chrysolepis), Jaime Holland 2011 University of Redlands

Development Of Extraction And Gas Chromatographic Analysis Methods For Epicuticular Waxes From Canyon Live Oak Leaves (Quercus Chrysolepis), Jaime Holland

Undergraduate Honors Theses

Epicuticular waxes of plants are important in protecting plants from a variety of several environmental factors, such as reducing evaporation of water from the surface, which prevents dehydration, and controlling important physiological properties. The waxes may consist of long chain alkanes, free carboxylic fatty acids, aldehydes, alcohols, and esters, but the composition varies between species, organ, age, and the environmental factors that are present in the location of the plants. The diversity of the chemical compositions, microcrystalline structures, and relative amounts of waxes are mostly associated with plant protection against certain environmental stresses that may be caused by insects or ...


The Cocks Ibe Scheme: The Legendre Symbol And Quadratic Reciprocity, Shannon Prager 2011 University of Redlands

The Cocks Ibe Scheme: The Legendre Symbol And Quadratic Reciprocity, Shannon Prager

Undergraduate Honors Theses

The Cocks IBE Scheme was first proposed by Clifford Cocks in 2001 at the 8th IMA International Conference on Cryptography and Coding. It is a cryptosystem that allows identity-based encryption (IBE) and is based on the difficulty of the composite quadratic residue problem, which has to do with when a number is a square modulo a positive integer n. [3] An identity-based encryption scheme is a type of public-key cryptosystem where the public key is some unique information about the identity of the user (e.g. a user's email address or important dates in his/her life). [5]

This ...


The Navier-Stokes Equations, Kourtney Renee Brandon 2011 University of Redlands

The Navier-Stokes Equations, Kourtney Renee Brandon

Undergraduate Honors Theses

The motion of fluids and gases, studied macroscopically as continuous material is the heart of fluid dynamics. Properties such as density, pressure, temperature, and velocity are taken to be well-defined at infinitely small points, and are assumed to vary continuously from one point to another. The discrete, molecular nature of a fluid is ignored. each of the variables such as velocity, pressure, and density are continuous functions of space and time. This continuum hypothesis permits us to mathematically model fluid flow using calculus. Navier-Stokes equations dictate not position but rather velocity. A solution of the Navier-Stokes equations is called a ...


A Longitudinal Study Of Wi-Fi Access Point Security Inthe Perth Central Business District, Emil Jacobson, Andrew Woodward 2011 Edith Cowan University

A Longitudinal Study Of Wi-Fi Access Point Security Inthe Perth Central Business District, Emil Jacobson, Andrew Woodward

Australian Information Security Management Conference

This study collected data in 2008 and 2011 in relation to the level of apparent security of wireless network access points in the Perth CBD. It also compared this data to a comparable study conducted in 2004. The aim was to determine whether businesses were using an appropriate level of encryption to protect their wireless networks. A pre-determined route was followed which traced the Perth CBD and the open source wireless network auditing tool Kismet was used to survey the wireless networks. In 2008, approximately 1300 access points were discovered in the Perth CBD, this number climbing to approximately 3400 ...


Hippocampal Astrogliosis And Neuronal Cell Loss In An Experimental P10 Neonatal Model Of Mesial Temporal Lobe Epilepsy., Shane Crilly, Mark Dunleavy, David C. Henshall 2011 Royal College of Surgeons in Ireland

Hippocampal Astrogliosis And Neuronal Cell Loss In An Experimental P10 Neonatal Model Of Mesial Temporal Lobe Epilepsy., Shane Crilly, Mark Dunleavy, David C. Henshall

Physiology and Medical Physics Articles

Mesial temporal lobe epilepsy (MTLE) is the most common form of intractable seizure disorder in adults. It is associated with an asymmetrical pattern of neuron loss within the hilus and CA1 hippocampal subfields, with relative sparing of the dentate granule neurons and the CA2 subfields. The amygdalar nuclei and the cortical neurons are other areas that are rarely involved in MTLE.1

The neuropathological changes that bring about focally evoked seizures in the adult are thought to begin in the early stages of neonatal life. A wide range of factors have been implicated in the causation of MTLE, such as ...


Bone Morphogenetic Protein 3 Controls Insulin Gene Expression And Is Down-Regulated In Ins-1 Cells Inducibly Expressing A Hepatocyte Nuclear Factor 1a-Maturity-Onset Diabetes Of The Young Mutation., Caroline Bonner, Angela M. Farrelly, Caoimhín G. Concannon, Heiko Düssmann, Mathurin Baquié, Isabelle Virard, Hella Wobser, Donat Kögel, Claes B. Wollheim, Marjan Rupnik, Maria M. Byrne, Hans-Georg König, Jochen HM Prehn 2011 Royal College of Surgeons in Ireland

Bone Morphogenetic Protein 3 Controls Insulin Gene Expression And Is Down-Regulated In Ins-1 Cells Inducibly Expressing A Hepatocyte Nuclear Factor 1a-Maturity-Onset Diabetes Of The Young Mutation., Caroline Bonner, Angela M. Farrelly, Caoimhín G. Concannon, Heiko Düssmann, Mathurin Baquié, Isabelle Virard, Hella Wobser, Donat Kögel, Claes B. Wollheim, Marjan Rupnik, Maria M. Byrne, Hans-Georg König, Jochen Hm Prehn

Physiology and Medical Physics Articles

Inactivating mutations in the transcription factor hepatocyte nuclear factor (HNF) 1A cause HNF1A-maturity-onset diabetes of the young (HNF1A-MODY), the most common monogenic form of diabetes. To examine HNF1A-MODY-induced defects in gene expression, we performed a microarray analysis of the transcriptome of rat INS-1 cells inducibly expressing the common hot spot HNF1A frameshift mutation, Pro291fsinsC-HNF1A. Real-time quantitative PCR (qPCR), Western blotting, immunohistochemistry, reporter assays, and chromatin immunoprecipitation (ChIP) were used to validate alterations in gene expression and to explore biological activities of target genes. Twenty-four hours after induction of the mutant HNF1A protein, we identified a prominent down-regulation of the bone ...


Investigating The Role Of The Internet In Women And Minority Stem Participation: A Case Study Of Two Florida Engineering Programs, Arland Nguema Ndong 2011 University of South Florida

Investigating The Role Of The Internet In Women And Minority Stem Participation: A Case Study Of Two Florida Engineering Programs, Arland Nguema Ndong

Graduate Theses and Dissertations

Despite our awareness of the fascination modern humans have with the Internet, little is known about how and why colleges and universities create and maintain Websites. At the most general level, in this case study, I hypothesize that university Websites serve as communication and marketing tools in attracting students. At the most specific level, I postulate that civil engineering programs with Web pages depicting images of women and minorities would be more successful in recruiting and retaining women and students of color than civil engineering programs with Web pages displaying fewer or no images of women and minorities. The primary ...


Observations On Braided Thin Wire Nucleate Boiling In Microgravity, Justin P. Koeln, Jeffrey C. Boulware, Heng Ban, JR Dennison 2011 Utah State University

Observations On Braided Thin Wire Nucleate Boiling In Microgravity, Justin P. Koeln, Jeffrey C. Boulware, Heng Ban, Jr Dennison

Publications

A microgravity experiment was conducted on the Space Shuttle Endeavor (STS-108) to observe sustained nucleate boiling of water. Subcooled water was boiled with a single strand and a braid of three 0.16. mm diameter and 80. mm long Nichrome resistive wires. A CCD video camera recorded the experiment while six thermistors recorded the temperature of the fluid at various distances from the heating element. This paper reports experimental results in observations, measurements, and data analysis. Bubble explosions were found to take place shortly after the onset of boiling for both the single and braid of wires. The explosion may ...


Time-Resolved Resonance Raman And Computational Investigation Of The Influence Of 4-Acetamido And 4-N-Methylacetamido Substituents On The Chemistry Of Phenylnitrene, Jiaden Xue, Shubham Vyas, Yong Du, Hoi-Ling Luk, Yung-Ping Chuang, Tracy Yuen Sze But, Patrick H. Toy, Jin Wang, Arthur Winter, David Lee Phillips, Christopher M. Hadad, Matthew S. Platz 2011 University of Hong Kong

Time-Resolved Resonance Raman And Computational Investigation Of The Influence Of 4-Acetamido And 4-N-Methylacetamido Substituents On The Chemistry Of Phenylnitrene, Jiaden Xue, Shubham Vyas, Yong Du, Hoi-Ling Luk, Yung-Ping Chuang, Tracy Yuen Sze But, Patrick H. Toy, Jin Wang, Arthur Winter, David Lee Phillips, Christopher M. Hadad, Matthew S. Platz

Arthur Winter

A time-resolved resonance Raman (TR3) and computational investigation of the photochemistry of 4-acetamidophenyl azide and 4-N-methylacetamidophenyl azide in acetonitrile is presented. Photolysis of 4-acetamidophenyl azide appears to initially produce singlet 4-acetamidophenylnitrene which undergoes fast intersystem crossing (ISC) to form triplet 4-acetamidophenylnitrene. The latter species formally produces 4,4′-bisacetamidoazobenzene. RI-CC2/TZVP and TD-B3LYP/TZVP calculations predict the formation of the singlet nitrene from the photogenerated S1 surface of the azide excited state. The triplet 4-acetamidophenylnitrene and 4,4′-bisacetamidoazobenzene species are both clearly observed on the nanosecond to microsecond time-scale in TR3 experiments. In contrast, only one species can be ...


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