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Articles 31 - 60 of 1367
Full-Text Articles in Physical Sciences and Mathematics
Misplaced Trust: Kerberos 4 Session Keys, Bryn Dole, Steve Lodin, Eugene H. Spafford
Misplaced Trust: Kerberos 4 Session Keys, Bryn Dole, Steve Lodin, Eugene H. Spafford
Department of Computer Science Technical Reports
No abstract provided.
Towards The Determination Of The Optimal P-Cyclic Ssor, A. Hadjidimos, D. Noutsos, M. Tzoumas
Towards The Determination Of The Optimal P-Cyclic Ssor, A. Hadjidimos, D. Noutsos, M. Tzoumas
Department of Computer Science Technical Reports
No abstract provided.
On The Approximate Pattern Occurrences In A Text, Mireille Régnier, Wojciech Szpankowski
On The Approximate Pattern Occurrences In A Text, Mireille Régnier, Wojciech Szpankowski
Department of Computer Science Technical Reports
No abstract provided.
Entropy Computations Via Analytic Depoissonization, Philippe Jacquet, Wojciech Szpankowski
Entropy Computations Via Analytic Depoissonization, Philippe Jacquet, Wojciech Szpankowski
Department of Computer Science Technical Reports
No abstract provided.
On Asymptotics Of Certain Recurrences Arising In Multi-Alphabet Universal Coding, Wojciech Szpankowski
On Asymptotics Of Certain Recurrences Arising In Multi-Alphabet Universal Coding, Wojciech Szpankowski
Department of Computer Science Technical Reports
No abstract provided.
Knowledge Discovery In Computational Science: A Case Study In Algorithm Selection, N. Ramakrishnan, John R. Rice
Knowledge Discovery In Computational Science: A Case Study In Algorithm Selection, N. Ramakrishnan, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
The Purdue Pse Kernel: Towards A Kernel For Building Pses, Sanjiva Weerawarana, Elias N. Houstis, John R. Rice, Ann C. Catlin, Margaret G. Gaitatzes, Shahani Markus, Tzveten T. Drashansky
The Purdue Pse Kernel: Towards A Kernel For Building Pses, Sanjiva Weerawarana, Elias N. Houstis, John R. Rice, Ann C. Catlin, Margaret G. Gaitatzes, Shahani Markus, Tzveten T. Drashansky
Department of Computer Science Technical Reports
No abstract provided.
Angle-Resolved X-Ray Circular And Magnetic Circular Dichroisms: Definitions And Applications, Sy Y. Tong, X. Q. Guo, James G. Tobin, George Daniel Waddill
Angle-Resolved X-Ray Circular And Magnetic Circular Dichroisms: Definitions And Applications, Sy Y. Tong, X. Q. Guo, James G. Tobin, George Daniel Waddill
Physics Faculty Research & Creative Works
We introduce definitions of angle-resolved x-ray circular dichroism (ARXCD) and magnetic x-ray circular dichroism (ARMXCD). As defined, the much larger effect of circular dichroism (ARXCD) is separated from the smaller magnetic (ARMXCD) effect. In all materials, ARXCD is zero along mirror planes while nonzero elsewhere. ARMXCD is nonzero only in magnetic materials. The measurement and analysis of ARMXCD allow element specific surface magnetism and surface structure as well as their inter-relationship to be studied as functions of the outgoing electron's direction.
Assessment Of The Status Of Harbor Porpoise (Phocoena Phocoena) In Oregon And Washington Waters, S. Osmek, J. Calambokidis, J. Laake, P. Gearin, R. Delong, J. Scordino, S. Jeffries, R. Brown
Assessment Of The Status Of Harbor Porpoise (Phocoena Phocoena) In Oregon And Washington Waters, S. Osmek, J. Calambokidis, J. Laake, P. Gearin, R. Delong, J. Scordino, S. Jeffries, R. Brown
United States Department of Commerce: Staff Publications
The status of harbor porpoise, Phocoena phocoena, is reviewed for stocks in Oregon and Washington waters, and the adjacent transboundary waters of southern British Columbia, Canada, emphasizing the most recent data on their geographic range, population structure, distribution, population size, trends in abundance, and reproductive biology. This information is used to determine if the annual rate of incidental mortality and serious injury in gill-net fisheries from 1990-94 could be at a biologically significant level.
In the eastern North Pacific Ocean, harbor porpoise are found near the coast, generally in water depths of less than 200 m. Differences in harbor porpoise …
A Cscw Framework For Networked Multimodal Synthetic Environments, Chandrajit L. Bajaj, Fausto Berardini, Steven Cutchin, Raimund Merket
A Cscw Framework For Networked Multimodal Synthetic Environments, Chandrajit L. Bajaj, Fausto Berardini, Steven Cutchin, Raimund Merket
Department of Computer Science Technical Reports
No abstract provided.
Dynamic Scheduling Of Process Groups, Kuei Yu Wang, Dan C. Marinescu, Octavian F. Carbunar
Dynamic Scheduling Of Process Groups, Kuei Yu Wang, Dan C. Marinescu, Octavian F. Carbunar
Department of Computer Science Technical Reports
No abstract provided.
An Inline Optical Electron Polarimeter, K. W. Trantham, Timothy J. Gay, R. J. Vandiver
An Inline Optical Electron Polarimeter, K. W. Trantham, Timothy J. Gay, R. J. Vandiver
Timothy J. Gay Publications
The design and operation of a simple inline optical electron polarimeter is presented. It is based on exchange excitation of ground state neon atoms. The electron polarization is determined from the degree of circular polarization of the subsequent 2p53p 3D3→2p53s 3P2 (6402 Å) fluorescence. This device can characterize both longitudinally and transversely polarized electron beams in a nondestructive fashion, and is inexpensive and easily constructed.
Selective Excitation And Structure In The Continuum, C. E. Carroll, Foek T. Hioe
Selective Excitation And Structure In The Continuum, C. E. Carroll, Foek T. Hioe
Physics Faculty/Staff Publications
We show that efficient transfer of molecules or atoms from one bound state to another is possible via the continuum in some cases, using two overlapping laser pulses. The structure of the continuum determines the pulse delay, laser frequencies, and laser intensities that should be used. We present simple formulas that relate the optimum values of pulse intensities, pulse separation, and detuning; these estimates can be used as a guide. More detailed calculations give quantitative results for two specific potentials.
Algorithms For Adapting Materialised Views In Data Warehouses, Mukesh Mohania, Guozhu Dong
Algorithms For Adapting Materialised Views In Data Warehouses, Mukesh Mohania, Guozhu Dong
Kno.e.sis Publications
In this paper we consider the problem of materialised view adaptation in data warehouses. Materialised views are important in data warehousing where they are used to speed up query processing on large amounts of data. User requirements change over time, which may change the definitions of views dynamically. For such situations, the question arises whether the materialised views should be recomputed from scratch for every change in the definition or they should be obtained by adapting old materialised views. Changes to a view definition may be expensive, if the view is recomputed from scratch. Therefore, it is worthwhile to examine …
Stars Classified As Constant In The General Catalogue Of Variable Stars, Ii, Edward G. Schmidt
Stars Classified As Constant In The General Catalogue Of Variable Stars, Ii, Edward G. Schmidt
Edward Schmidt Publications
Photometric observations have been made of 36 stars classified as CST or CST: in the General Catalogue of Variable Stars. Six of these stars are found to vary and three others were deemed possible variables. Of the certain variables, two (MR Her and TY Sge) are red pulsators, one (V1585 Cyg) is a rapid irregular variable, one is apparently a short period Cepheid-strip star (V432 Oph), one is an eclipsing binary (AQ Boo), and one is of uncertain type (V351 Cyg). The stars we have observed as MR Her and TY Sge are the same ones which were identified on …
The Behlen Observatory Variable Star Survey, Iv, Edward G. Schmidt, Anil Seth
The Behlen Observatory Variable Star Survey, Iv, Edward G. Schmidt, Anil Seth
Edward Schmidt Publications
Finding charts, accurate coordinates, and light curves are presented for 106 variable stars including 6 which are newly discovered. Parameters descriptive of the light curves are tabulated including periods for 16 stars which lacked them. The periods from the General Catalog of Variable Stars for ten stars were found to be seriously in error. The classification of the stars is discussed. Revisions or refinements of the classifications from the General Catalogue of Variable Stars are suggested for 20 stars and classifications are given for 7 which were previously unclassified. 15%-23% of the Bailey type ab RR Lyrae stars show scatter …
A Chemical Pathway To The Formation Of Chlorinated Compounds During Combustion, Xiaodong Yang
A Chemical Pathway To The Formation Of Chlorinated Compounds During Combustion, Xiaodong Yang
Masters Theses & Specialist Projects
Two reactions, the Deacon reaction and the chlorination of phenol, which are the postulated starting steps for the formation of chlorinated dioxins during the incineration of the refuse derived fuel, were investigated in this work. Reactions were conducted in a tube furnace, and the products were trapped and analyzed by gas chromatography/mass spectroscopy. It was shown that the Deacon reaction was favored at higher temperatures. The chlorination of phenol in vapor phase was found to begin at temperatures as low as 250°C and to be favored at higher temperatures. The ortho and para positions in the phenol ring are the …
Evaluation Of Constructed Wetlands For The Waste Management Of A Large Scale Swine Production Unit, Robert Sutton
Evaluation Of Constructed Wetlands For The Waste Management Of A Large Scale Swine Production Unit, Robert Sutton
Masters Theses & Specialist Projects
The effectiveness of using constructed wetlands to remove unwanted nutrients, increase dissolved oxygen while at the same time decreasing the biological oxygen demand, and to reduce the levels of the Fecal Coliform Bacteria from a swine operation was evaluated. The indicator of proper waste purification will be the result of testing for the following: ammonia nitrogen, nitrate nitrogen, total phosphorus, total suspended solids, dissolved solids, dissolved oxygen, biological oxygen demand, and Fecal Coliform Bacteria. The wetland was divided into nine connected cells that covered approximately 3.8 hectares. Material was loaded from an anaerobic holding lagoon on four separate occasions during …
A Study Of The Behavior Of Chlorine And Organic Compounds During Combustion In An Afbc System, Jenny Heidbrink
A Study Of The Behavior Of Chlorine And Organic Compounds During Combustion In An Afbc System, Jenny Heidbrink
Masters Theses & Specialist Projects
The purpose of this study is to understand the behavior of chlorine and the emission of organic compounds during combustion in an atmospheric fluidized bed combustion (AFBC) system. Inefficient, uncontrolled use of coal gives rise to organic emissions which can be detrimental to health. The chlorine in coal may cause corrosion problems during utilization, if its concentration is high enough. The method for collection of the emissions of organic compounds involved the use of a Tenax resin as an absorbent for the organic compounds as they were emitted from the combustor. A combined gas chromatography - mass spectrometry (GC-MS) technique …
The Prairie Naturalist Volume 28, No. 4. December 1996
The Prairie Naturalist Volume 28, No. 4. December 1996
The Prairie Naturalist
IMPLANTED MICROCHIPS USED TO INDIVIDUALLY IDENTIFY BLACK-FOOTED FERRETS IN MONTANA ▪ R. Stoneberg
GRAY WOLF STATUS IN NORTH DAKOTA ▪ D. S Licht and L. E. Huffman
VARIATION IN SELECTION OF MICROHABITATS BY MERRIAM'S TURKEY BROOD HENS ▪ M. A. Rumble and S. H. Anderson
SURVIVAL AND REPRODUCTIVE CHRONOLOGY OF FEMALE RING-NECKED PHEASANTS IN SOUTH DAKOTA ▪ A. P. Leif
EFFECTS OF LOGGING SLASH ON ASPEN REGENERATION IN GRAZED CLEARCUTS ▪ M. A. Rumble, T. Pella, J. C. Sharps. A. V. Carter, and J. B. Parrish
BOOK REVIEWS
The Poetry of Ecoregions ▪ J. Pastor
Saving Texas' Rare Ones ▪ …
Inhomogeneity In Gelation And Nonuniversality Of Sol-To-Gel Transitions Studied By A Computer Simulation Model, Yi-Min Liu, R.B. Pandey
Inhomogeneity In Gelation And Nonuniversality Of Sol-To-Gel Transitions Studied By A Computer Simulation Model, Yi-Min Liu, R.B. Pandey
Faculty Publications
No abstract provided.
Spheromak Experiment Using Separate Guns For Formation And Sustainment, Michael R. Brown, A. Martin
Spheromak Experiment Using Separate Guns For Formation And Sustainment, Michael R. Brown, A. Martin
Physics & Astronomy Faculty Works
An experiment is described that incorporates the use of separate magnetized plasma guns for formation and sustainment of a spheromak. It is shown that energy coupling efficiency approaches unity if the gun and spheromak are of comparable size. A large gun should be able to operate at lower current and therefore lower voltage. In addition, it is expected that a gun matched to the size of the spheromak will cause less perturbation to the equilibrium. It is proposed to use a smaller gun for spheromak formation and a large, efficient gun for sustainment. The theoretical basis for the experiment is …
Elucidation Of Vancomycin's Enantioselective Binding Site Using Its Copper Complex, Usha B. Nair, Samuel S.C. Chang, Daniel W. Armstrong, Yasir Y. Rawjee, Drake S. Eggleston, James V. Mcardle
Elucidation Of Vancomycin's Enantioselective Binding Site Using Its Copper Complex, Usha B. Nair, Samuel S.C. Chang, Daniel W. Armstrong, Yasir Y. Rawjee, Drake S. Eggleston, James V. Mcardle
Chemistry Faculty Research & Creative Works
Vancomycin forms a stable complex with Cu2+ in neutral aqueous solutions. The enantioselectivity of native vancomycin was compared to that of the copper-vancomycin complex using capillary electrophoresis (CE). There were significant differences in their enantioselectivities. This can be attributed to the fact that copper ion coordinates with some of the same functional groups in vancomycin that are essential for chiral recognition and enantioresolution. An amine moiety that provides one of the more important enantioselective interactions was identified. This chiral interaction site was illustrated using a color-coded, space-filling model of the X-ray crystal structure of the copper-vancomycin complex. Successful enantioselective interactions …
Export Database Derivation Approach For Supporting Object-Oriented Wrapper Queries, Ee Peng Lim, Hon-Kuan Lee
Export Database Derivation Approach For Supporting Object-Oriented Wrapper Queries, Ee Peng Lim, Hon-Kuan Lee
Research Collection School Of Computing and Information Systems
Wrappers export the schema and data of existing heterogeneous databases and support queries on them. In the context of cooperative information systems, we present a flexible approach to specify the derivation of object-oriented (OO) export databases from local relational databases. Our export database derivation consists of a set of extent derivation structures (EDS) which defines the extent and deep extent of export classes. Having well-defined semantics, the EDS can be readily used in transforming wrapper queries to local queries. Based on the EDS, we developed a wrapper query evaluation strategy which handles OO queries on the export databases. The strategy …
Building A Competition Buzzer Set, John R. Dennison, Richard Davis
Building A Competition Buzzer Set, John R. Dennison, Richard Davis
All Physics Faculty Publications
No abstract provided.
A Specialization Toolkit To Increase The Diversity Of Operating Systems, Calton Pu, Andrew P. Black, Crispin Cowan, Jonathan Walpole, Charles Consel
A Specialization Toolkit To Increase The Diversity Of Operating Systems, Calton Pu, Andrew P. Black, Crispin Cowan, Jonathan Walpole, Charles Consel
Computer Science Faculty Publications and Presentations
Virus and worm attacks that exploit system implementation details can be countered with a diversified set of implementations. Furthermore, immune systems show that attacks from previously unknown organisms require effective dynamic response. In the Synthetix project, we have been developing a specialization toolkit to improve the performance of operating system kernels. The toolkit helps programmers generate and manage diverse specialized implementations of software modules. The Tempo-C specializer tool generates different versions for both compile-time and run-time specialization. We are now adapting the toolkit to improve operating system survivability against implementations attacks.
Fabrication Of N-Type Nickel Doped B5 C1+Δ Homojunction And Heterojunction Diodes, Seong-Don Hwang, Ken Yang, Peter A. Dowben, Ahmad A. Ahmad, N.J. Ianno, J.Z. Li, J.Y. Lin, H.X. Jiang, D.N. Mcilroy
Fabrication Of N-Type Nickel Doped B5 C1+Δ Homojunction And Heterojunction Diodes, Seong-Don Hwang, Ken Yang, Peter A. Dowben, Ahmad A. Ahmad, N.J. Ianno, J.Z. Li, J.Y. Lin, H.X. Jiang, D.N. Mcilroy
Peter Dowben Publications
We have successfully nickel doped a boron carbide (B5C) alloy film. The nickel doped boron-carbide (Ni-B5C1+δ) thin films were fabricated from a single source carborane cage molecule and nickelocene [Ni(C5H5)2] using plasma enhanced chemical vapor deposition. Nickel doping transforms the highly resistive undoped film from a p-type material to an n-type material. This has been verified from the characteristics of diodes constructed of Ni-B5C1+δ on both n-type silicon and p-type B5C. The homojunction diodes exhibit excellent rectifying properties over a wide range of temperatures. ©1997 …
Investigating The Evolution Of Multifragmenting Systems With Fragment Emission Order, E. W. Cornell, T. M. Hamilton, D. Fox, Y. Lou, R. T. De Souza, M. J. Huang, W. C. Hsi, C. Schwarz, C. Williams, D. R. Bowman, J. Dinius, C. K. Gelbke, D. O. Handzy, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, L. Phair, M. B. Tsang, G. Vanburen, R. J. Charity, L. G. Sobotka, W. A. Friedman
Investigating The Evolution Of Multifragmenting Systems With Fragment Emission Order, E. W. Cornell, T. M. Hamilton, D. Fox, Y. Lou, R. T. De Souza, M. J. Huang, W. C. Hsi, C. Schwarz, C. Williams, D. R. Bowman, J. Dinius, C. K. Gelbke, D. O. Handzy, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, L. Phair, M. B. Tsang, G. Vanburen, R. J. Charity, L. G. Sobotka, W. A. Friedman
Faculty Publications
Multifragment decays of central collisions in 84Kr+197Au at E/A=70MeV are studied. By utilizing a technique sensitive to the emission order of fragments, it is deduced that carbon fragments are emitted prior to beryllium fragments when these fragments have the same velocity. This observation is consistent with the cooling of a thermally decaying source.
Reactions Of Singlet Oxygen And Singlet Oxygen Mimics With Dicyclopropylethylenes: Comparison Of Reactivity And Mechanisms, Gina Elizabeth Alume
Reactions Of Singlet Oxygen And Singlet Oxygen Mimics With Dicyclopropylethylenes: Comparison Of Reactivity And Mechanisms, Gina Elizabeth Alume
FIU Electronic Theses and Dissertations
An extensive study of the reaction pathways of 1,1- dicyclopropyl ethylene, cis- and trans- 1,2-dicyclopropylethylenes has been undertaken with different electrophiles 4-methyl-1,2,4- triazoline-3,5-dione (MTAD), tetracyanoethylene (TCNE), and singlet oxygen (102). Comparison of reactivity and reaction mechanisms among the electrophiles is investigated. Singlet oxygen exhibits significantly lower reactivity compared to the other electrophiles. MTAD and TCNE react with dicyclopropylethylenes to produce predominantly "2+2" adducts and a small amount of the "ene" adducts. The "2+2" is the major product presumably because of the high activation energy leading to the highly strained "ene" products. Solvent trapping studies provide strong evidence of …
Far-Field Scattering Of A Non-Gaussian Off-Axis Axisymmetric Laser Beam By A Spherical Particle, James A. Lock, Joseph T. Hodges
Far-Field Scattering Of A Non-Gaussian Off-Axis Axisymmetric Laser Beam By A Spherical Particle, James A. Lock, Joseph T. Hodges
Physics Faculty Publications
Experimental laser beam profiles often deviate somewhat from the ideal Gaussian shape of the axisymmetric TEM(00) laser mode. To take these deviations into account when calculating light scattering of an off-axis beam by a spherical particle, we use our phase-modeling method to approximate the beam-shape coefficients in the partial wave expansion of an experimental laser beam. We then use these beam-shape coefficients to compute the near-forward direction scattering of the off-axis beam by the particle. Our results are compared with laboratory data, and we give a physical interpretation of the various features observed in the angular scattering patterns. (C) 1996 …