Physical Sciences and Mathematics Commons^™

Estimates For Fourier Transform Of Measures Supported On Singular Hypersurfaces, Isroil A. Ikromov

Turkish Journal of Mathematics

We consider hypersurfaces S \subset \RR^3 with zero Gaussian curvature at every ordinary point with surface measure dS and define the surface measure d\mu = \psi(x)dS(x) for smooth function \psi with compact support. We obtain uniform estimates for the Fourier transform of measures concentrated on such hypersurfaces. We show that due to the damping effect of the surface measure the Fourier transform decays faster than O( \xi ^{-1/h}), where h is the height of the phase function. In particular, Fourier transform of measures supported on the exceptional surfaces decays in the order O( \xi ^{-1/2}) (as \xi \to +\infty).

Uniqueness Of Coprimary Decompositions, M. Maani-Shirazi, P. F. Smith

Turkish Journal of Mathematics

Uniqueness properties of coprimary decompositions of modules over non-commutative rings are presented.

Slant Submanifolds Of Kaehler Product Manifolds, Bayram Şahi̇n, Sadik Keleş

Turkish Journal of Mathematics

In this paper, we study slant submanifolds of a Kaehler product manifold. We show that an F-invariant slant submanifold of Kaehler product manifold is a product manifold. We also obtain some curvature inequalities in terms of scalar curvature and Ricci tensor.

Traces Of Maximal Ideals Of Topological Algebras In Their Subalgebras, Mart Abel, Mati Abel

Turkish Journal of Mathematics

Let K be one of the fields R or C, A a topological associative algebra over K with separately continuous multiplication, B a subalgebra of A and M a closed maximal regular left (right or two-sided) ideal of A such that the trace M \cap B of M is a proper subset of B. In cases, when B is a Gelfand-Mazur subalgebra of A or a subalgebra of the centre Z(A) of A, such classes of topological algebras in which M \cap B (in the subset topology) is a closed maximal regular left (respectively, right or two-sided) ideal of B, …

Quasi-Permutation Representations Of Groups Of Order 64, Houshang Behravesh, Ghodrat Ghaffarzadeh

Turkish Journal of Mathematics

In [1], we gave algorithms to calculate c(G), q(G) and p(G) for a finite group G. In this paper, we will calculate c(G), q(G), p(G) for non-abelian groups G, where G =64.

On Modular Lie Representations Of Finite Groups, R. M. Bryant, Ralph Stöhr

Turkish Journal of Mathematics

We give a new and substantially simplified proof of a key technical result in the theory of modular Lie representations of finite groups.

Noetherian Hopf Algebras, Kenneth A. Brown

Turkish Journal of Mathematics

This short survey article reviews our current state of understanding of the structure of noetherian Hopf algebras. The focus is on homological properties. A number of open problems are listed.

Commutators, Words, Conjugacy Classes And Character Methods, Aner Shalev

Turkish Journal of Mathematics

In this survey paper we show how character methods can be used to solve a wide range of seemingly unrelated problems. These include commutators, powers of conjugacy classes and related random walks, as well as word maps and Waring type problems. In particular we describe recent progress made on conjectures of Ore, of Thompson, and of Lulov and Pak. New open problems and conjectures are also stated.

Centralizers In Locally Finite Groups, Pavel Shumyatsky

Turkish Journal of Mathematics

The topic of the present paper is the following question. Let G be a locally finite group admitting an automorphism \phi of finite order such that the centralizer C_G(\phi) satisfies certain finiteness conditions. What impact does this have on the structure of the group G? Equivalently, one can ask the same question when \phi is an element of G. Sometimes the impact is quite strong and the paper is a survey of results illustrating this phenomenon. In particular, we concentrate on results where G is shown to have a large nilpotent or soluble subgroup. Naturally, in each case the result …

Hartley´S Theorem On Representations Of The General Linear Groups And Classical Groups, A. E. Zalesski

Turkish Journal of Mathematics

We suggest a new proof of Hartley's theorem on representations of the general linear groups GL_n(K) where K is a field. Let H be a subgroup of GL_n(K) and E the natural GL_n(K)-module. Suppose that the restriction E _H of E to H contains a regular KH-module. The theorem asserts that this is then true for an arbitrary GL_n(K)-module M provided dim M>1 and H is not of exponent 2. Our proof is based on the general facts of representation theory of algebraic groups. In addition, we provide partial generalizations of Hartley's theorem to other classical groups.

Black Box Groups, Şükrü Yalçinkaya

Turkish Journal of Mathematics

We propose a uniform approach for recognizing all black box groups of Lie type which is based on the analysis of the structure of the centralizers of involutions. Our approach can be viewed as a computational version of the classification of the finite simple groups. We present an algorithm which constructs a long root SL_2(q)-subgroup in a finite simple group of Lie type of odd characteristic, then we use the Aschbacher's ``Classical Involution Theorem'' as a model in the recognition algorithm and we construct all root SL_2(q)-subgroups corresponding to the nodes in the extended Dynkin diagram, that is, we construct …

Physical Modeling And Analysis Of P-Wave Attenuation Anisotropy, Kasper Van Wijk

CGISS Publications and Presentations

Anisotropic attenuation can provide sensitive attributes for fracture detection and lithology discrimination. This paper analyzes measurements of the P-wave attenuation coefficient in a transversely isotropic sample made of phenolic material. Using the spectral-ratio method, we estimate the group (effective) attenuation coefficient of P-waves transmitted through the sample for a wide range of propagation angles (from 0° to 90°) with the symmetry axis. Correction for the difference between the group and phase angles and for the angular velocity variation help us to obtain the normalized phase attenuation coefficient A governed by the Thomsen-style attenuation-anisotropy parameters ε_Q and δ_Q. …

Valuing New Jersey's Natural Capital: An Assessment Of The Economic Value Of The State's Natural Resources, Robert Costanza

Institute for Sustainable Solutions Publications and Presentations

This report is divided into three main parts. Part I presents essential background information, summarizes the detailed findings of Parts II and III and their limitations, and explores in a preliminary way the policy implications of the natural capital project and the future research needs in this area. Part II focuses on ecosystem services and Part III deals with ecosystem goods.

Thermal Transient Flow Rate Sensor For High Temperature Liquid Metal Cooled Nuclear Reactor, Yingtao Jiang

Reactor Campaign (TRP)

In nuclear power plants and accelerator driven system (ADS) for nuclear waste treatment, it is important to monitor the coolant flow rate in the reactor core and pipe-line. In such a strong irradiation, high pressure and temperature environment, no accurate local flow measurement technique is readily available. Electromagnetic (EM) flow meter is popular in low temperature application as it is a non-intrusive technology. However, additional voltage will be produced due to temperature, flow, pressure, the chemical properties of the liquid metal and surface condition of the steel walls. In addition, the non-definite wetting behavior of liquid lead-bismuth to the electrically …

Dissolution, Reactor, And Environmental Behavior Of Zro2-Mgo Inert Fuel Matrix, Kenneth Czerwinski

Fuels Campaign (TRP)

This project will examine inert fuels containing ZrO₂ and MgO as the inert matrix. Ceramics with this inert matrix, Ce, U and eventually Pu will be synthesized and examined. While the Advanced Fuel Cycle Initiative focus is on inert fuels with Pu as the fissile component, this task will perform initial laboratory experiments with Ce and U. The initial work with Ce will be performed early in the project with results used as a basis for U studies. Reactor physics calculations will be used to examine suitable quantities of burnable poisons from the candidate elements Gd, Er, or Hf. …

Impact Of The Synthesis Process On Structure Properties For Afci Fuel Candidates, Kenneth Czerwinski

Fuels Campaign (TRP)

Synthesis of actinium mononitrides using carbothermic reduction of the corresponding oxides has a few outstanding issues, including the formation of secondary phases such as oxides and carbides and low densities of the final product. Furthermore the requirement of a high process temperature at 1700°C, for more than 12 hours is also a drawback particularly for Americium-bearing samples. Therefore, it is important to explore the use of other possible routes to synthesize actinide mononitrides.

A low temperature process is used in this research to produce actinide mononitrides using a fluoride route in which the first step is to mix the actinide …

Ground Water Level Monitoring At Yucca Mountain — A Programmatic Summary, H. Scott Page

Publications (YM)

Scope - Confirmatory study supporting previously gathered information
- Measure levels on established network of monitoring wells
- Submit data annually

Objectives - Provide measurements of known accuracy and precision
- Use manual and electronic equipment
- Provide quality assured data
- Contribute to hydrological understanding
- Support refinement of potentiometric surface
- Provide data for regional flow model
- Fulfill State of Nevada permit conditions
- Monitor transient events such as seismically induced fluctuations and precipitation-related phenomena
- Support long term monitoring and trend analysis
- Support proposed repository licensing application

Yucca Mountain Climate: Past, Present, And Future, Saxon E. Sharpe

Publications (YM)

Evaluation of modern climate is necessary to relate climatic events to near-surface processes such as infiltration, runoff, and evapotranspiration.

Modern climate information also aids in environmental analyses of repository design facilities and atmospheric dispersion models.

Evaluation of past climate regimes, particularly temperature and precipitation, is needed to assess the relation of past climate to past hydrologic conditions.

Estimates of potential future climate and hydrology are needed to evaluate repository performance.

Yucca Mountain Saturated Zone Carbon-14, James Thomas, David L. Decker, Todd M. Mihevc, Ronald L. Hershey, Gary Patterson, Zell Peterman, Peter Striffler

Publications (YM)

Travel time of groundwater from beneath Yucca Mountain to down gradient areas is important to nuclear waste storage.
For this study, travel times determined by:
1) Dissolved inorganic carbon (DIC) isotopes Geochemical modeling--corrected C-14 ages
2) Dissolved organic carbon (DOC) isotopes DOC ages independent of DIC reactions

Interaction Energy Decomposition In Protein–Protein Association: A Quantum Mechanical Study Of Barnase–Barstar Complex, Abdessamad Ababou, Arjan Van Der Vaart, Valentin Gogonea, Kenneth M. Merz Jr.

Chemistry Faculty Publications

Protein–protein interactions are very important in the function of a cell. Computational studies of these interactions have been of interest, but often they have utilized classical modelling techniques. In recent years, quantum mechanical (QM) treatment of entire proteins has emerged as a powerful approach to study biomolecular systems. Herein, we apply a semi-empirical divide and conquer (DC) methodology coupled with a dielectric continuum model for the solvent, to explore the contribution of electrostatics, polarization and charge transfer to the interaction energy between barnase and barstar in their complex form. Molecular dynamic (MD) simulation was performed to account for the dynamic …

Role Of 2-5a-Dependent Rnase-L In Senescence And Longevity, J. B. Andersen, X. L. Li, C. S. Judge, Aimin Zhou, B. K. Jha, S. Shelby, L. Zhou, Robert H. Silverman, B. A. Hassel

Chemistry Faculty Publications

Senescence is a permanent growth arrest that restricts the lifespan of primary cells in culture, and represents an in vitro model for aging. Senescence functions as a tumor suppressor mechanism that can be induced independent of replicative crisis by diverse stress stimuli. RNase-L mediates antiproliferative activities and functions as a tumor suppressor in prostate cancer, therefore, we examined a role for RNase-L in cellular senescence and aging. Ectopic expression of RNase-L induced a senescent morphology, a decrease in DNA synthesis, an increase in senescence-associated -galactosidase activity, and accelerated replicative senescence. In contrast, senescence was retarded in RNase-L-null fibroblasts compared with …

Environmental Finance Center Network Directory, Vivian Tucker

All Maxine Goodman Levin School of Urban Affairs Publications

No abstract provided.

Molecular Mechanism Of Incorporation Of Factor Va Into Prothrombinase, Melissa Barhoover

ETD Archive

The mainstay of the blood coagulation cascade is the formation of the fibrin clot, catalyzed by the serine protease, thrombin. The prothrombinase complex catalyzes the activation of prothrombin to thrombin and, is composed of the enzyme, factor Xa, and the protein cofactor, factor Va, in the presence of divalent metal ions associated on a membrane surface. The enzyme, factor Xa, alone can activate prothrombin by two sequential proteolytic cleavages at Arg271 and Arg320 resulting in the intermediates, Fragment 1.2 and Prethrombin 2. The overall rate of this reaction is not compatible with survival. On the other hand, the incorporation of …

Characterization Of A Type Ii Metallothionein From Helianthus Annuus Using Recombinant Dna Techniques, Sridhar Bhogavalli

ETD Archive

Metallothioneins (MTs) are ubiquitous low molecular weight, cysteine rich proteins with a pronounced affinity for metal ions with d10 configuration such as Cu, Cd and Zn. These heavy metals form metal-thiolate clusters with cysteine side chains. In contrast to the vertebrate forms, knowledge about the properties of members of the plant metallothionein family is still scarce. We describe here a method of isolation and purification of metallothionein from the plant Helianthus annuus, performed by affinity chromatography using glutathione-agarose column. In this study, alignment of gene sequence of the isolated H. annuus metallothionein cDNA with known MTs showed that it belongs …

Characterizatin Of A Type Ii Metallothionein From Helianthus Annuus Using Recombinant Dna Techniques, Sridhar Bhogavalli

ETD Archive

Metallothioneins (MTs) are ubiquitous low molecular weight, cysteine rich proteins with a pronounced affinity for metal ions with d10 configuration such as Cu, Cd and Zn. These heavy metals form metal-thiolate clusters with cysteine side chains. In contrast to the vertebrate forms, knowledge about the properties of members of the plant metallothionein family is still scarce. We describe here a method of isolation and purification of metallothionein from the plant Helianthus annuus, performed by affinity chromatography using glutathione-agarose column. In this study, alignment of gene sequence of the isolated H. annuus metallothionein cDNA with known MTs showed that it belongs …

Characterization Of Polymorphic And Blended Drugs By Physical-Analytical Properties, Rajgopal Munigeti

ETD Archive

The polymorphs of Tolbutamide and Nifedipine were differentiated by measuring their unique physical properties. Differential Scanning Calorimetry (DSC) and Dielectric Analysis (DEA) verified the variations in these compounds with different crystal structures but the same chemical constituents. The crystalline-amorphous content of the polymorphs were determined based on a new DEA protocol. Solubility (w/w ) and spectroscopic methods clearly distinguished these drugs and compared favorably with the photomicrography of the polymorphs. Powder X-ray Diffraction (PXRD) analysis succintly showed differences in the various types of polymorphs. Scanning Electron Microscopy (SEM) supported the structural distinction and solubility. The FTIR spectra of all the …

Vibrational Characterisation And Fluorescence Optimisation Of Polycyclic Polymers, Luke O'Neill, Patrick Lynch, Mary Mcnamara, Hugh Byrne

Articles

A systematic series of polycyclic novel polymers was studied by Raman spectroscopy. The effect of the sequential introduction of polycyclic aromatic ring substituents into the delocalized backbone was examined in relation to the variation of the relative ring breathing and stretching as well as the vinyl stretch frequencies. Replacement of the phenyl units by higher order acene moieties such as naphthyl and anthryl results in a shift of the characteristic stretching frequencies, and analysis of the vinyl stretch leads to the confirmation that higher order acene substitution into the delocalized backbone substantially weakens the vinyl bond. Semiquantitative integrated Raman analysis …

Reissner–Nordstrom¨ Expansion, Emil Prodanov, Rossen Ivanov, V.G. Gueorguiev

Conference papers

We propose a classical mechanism for the cosmic expansion during the radiation-dominated era, assuming the Universe as a two-component gas. The first component is the ultra-relativistic “standard” fraction described by an equation of state of an ideal quantum gas of massless particles. The second component consist of superheavy charged particles and their interaction with the “standard” fraction drives the expansion. This interaction is described by the Reissner–Nordstr¨om metric purely geometrically — the superheavy charged particles are modeled as zero-dimensional naked singularities which exhibit gravitational repulsion. The radius of a repulsive sphere, surrounding a naked singularity of charge Q, is inversely …

Contents

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Elementary Mathematics Specialists – We Need Them Now! Follow Virginia's Lead!, F. Fennell

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.