Physical Sciences and Mathematics Commons^™

A Sem-Odb Application For The Western Cultures Database, Raquel Ghersgorin

FIU Electronic Theses and Dissertations

This thesis presents the evolution of the Western Cultures Database. The project starts with a database design using a Semantic modeling, and continues with the implementation following two techniques: a Relational and a Semantic approach. The project continues with them in parallel, reaching a point where the Relational is left aside because of the advantages of the Semantic (Sem-ODB) approach.

The Semantic implementation produces as a result the Western Culture Semantic Database Application - web interface (the main contribution of this thesis). The database is created and populated using Sem ODB and the web interface is built using WebRG (report …

Synthesis And Characterization Of Large Stereoregular Organosiloxane Cycles, O. I. Schchegolikhina, V. A. Igonin, Yulia A. Molodtsova, Yu. A. Pozdniakova, Alexandr A. Zhdanov, T. V. Strelkova, Sergey V. Lindeman

Chemistry Faculty Research and Publications

The large stereoregular phenyltrimethylsiloxysiloxane macrocycles of general formula [PhSi(OSiMe₃)O]_n (n=6 and 12) have been selectively obtained with high yields by trimethylsilylation of cage-like oligophenylmetallasiloxanes (OPMS) which we described earlier. The compounds 3 (n=6) and 4 (n=12) have been characterized by NMR-spectroscopy method and by single crystal X-ray analysis. This investigation showed unambiguously that the siloxane macrocycles keep their size and configuration (the same as in the initial OPMS) during the trimethylsilylation. Thus a synthetic route for obtaining large stereoregular siloxane macrocycles has been developed.

Statistics Of Active Galactic Nuclei In Rich Clusters Revisited, M. Way, R. Flores, H. Quintana

Physics Faculty Works

Using the spectrophotometry of a large sample of galaxies in 19 Abell clusters, we have selected 42 candidate active galactic nuclei (AGNs) using the criteria used by Dressler and coworkers in their analysis of the statistics of 22 AGNs in 14 rich cluster fields, which are based on the equivalent width of [O II] 3727 Å, Hβ, and [O III] 5007 Å emission. We have then discriminated AGNs from H II region-like galaxies (hereafter H II galaxies) in the manner developed by Veilleux & Osterbrock using the additional information provided by Hα and [N II] 6583 Å or Hα and …

Selective Determination Of Methylmercury By Flow-Injection Fast-Scan Voltammetry, Rebecca Lai, Eva Huang, Feimeng Zhou, David O. Wipf

Rebecca Lai Publications

A simple flow-injection system, suitable for solution flow rates at microliters-per-minute, has been combined with fast-scan voltammetry for selective determination of methylmercury. A thin Hg film was formed at a Pt microelectrode prior to the measurement. Detection of methylmercury is carried out by measuring the oxidation of methylmercury radicals that have been generated at the Hg microelectrode. At slow scan rates, the electrogenerated methylmercury radicals undergo a follow-up dimerization reaction to form dimethyldimercury (E_rC_i² mechanism). At fast scan rates, it was found that methylmercury radicals can be quantitatively reoxidized (reversible electron-transfer). Optimization of the experimental conditions …

Spiral Morphology-Dependent Resonances In An Optical Fiber: Effects Of Fiber Tilt And Focused Gaussian Beam Illumination, Andrew W. Poon, Richard K. Chang, James A. Lock

Physics Faculty Publications

Spiral morphology-dependent resonances have been observed in a tilted optical fiber. The polarization-preserving and the cross-polarized elastic-scattering spectra for plane-wave illumination show that the wavelengths of the resonances are blueshifted quadratically as the fiber tilt angle increases. When a focused Gaussian beam illuminates the fiber at its edge, the resonances are blueshifted and broadened as the detector is offset from the scattering plane with the maximum scattering intensity. The blueshift with focused beam illumination is also a consequence of the spiral resonances. (C) 1998 Optical Society of America.

2-Phenyl-3-(5,6,7,7a-Tetrahydro-1h,3h-Pyrrolo[1,2-C]Oxazol-3-Ylidene)-1-Propene-1,1-Dicarbonitrile And 4-(4-Methoxyphenyl)-2,6-Bis(Methylthio)Pyridine-3-Carbonitrile, M. George, S. Das, C.V. Ashokan, N.P. Rath, M.V. George

Chemistry & Biochemistry Faculty Works

The reaction of 3-aryl-2-cyano-5,5-bis(methylthio)penta-2,4-dienenitrile, (1), with (L)-(-)-2-hydroxymethylpyrrolidine, (2), gave two types of product, the normal substitution product, (3), and a pyridine derivative, (4). The structures of two representative examples, 2-phenyl-3-(5,6,7,7a-tetrahydro1H,3H-pyrrolo[1,2-c]oxazol-3-ylidene)-1-propene-1,1-dicarbonitrile, (3a), as its hemibenzene solvate, C17H14N3O.0.5C6H6, and 4-(4-methoxyphenyl)-2,6-bis(methylthio)pyridine-3-carbonitrile, (4b), C15H14N2OS2, have been unambiguously established by X-ray crystallographic analysis. The molecular packing of (4b) involves loosly held dimers with S1...S1' distances of 3.424 (1) Å.

2-Phenyl-3-(5,6,7,7a-Tetrahydro-1h,3h-Pyrrolo[1,2-C]Oxazol-3-Ylidene)-1-Propene-1,1-Dicarbonitrile And 4-(4-Methoxyphenyl)-2,6-Bis(Methylthio)Pyridine-3-Carbonitrile, M. George, S. Das, C.V. Ashokan, N.P. Rath, M.V. George

Nigam Rath

Maximally Disjoint Solutions Of The Set Covering Problem, David J. Rader, Peter L. Hammer

Mathematical Sciences Technical Reports (MSTR)

This paper is concerned with finding two solutions of a set covering problem that have a minimum number of variables in common. We show that this problem is NP­ complete, even in the case where we are only interested in completely disjoint solutions. We describe three heuristic methods based on the standard greedy algorithm for set covering problems. Two of these algorithms find the solutions sequentially, while the third finds them simultaneously. A local search method for reducing the overlap of the two given solutions is then described. This method involves the solution of a reduced set covering problem. Finally, …

Observation Of B+→ΩK+ And Search For Related B Decays Modes, T. Bergfeld, Kenneth A. Bloom, Cleo Collaboration

Kenneth Bloom Publications

We have searched for two-body charmless decays of B mesons to purely hadronic exclusive final states including ω or φ mesons using data collected with the CLEO II detector. With this sample of 6.6 X 10⁶ B mesons we observe a signal for the ωK⁺ final state, and measure a branching fraction of Ɓ(B⁺→ωK⁺) = (1.5_-0.6^+0.7 ± 0.2) X 10^-5. We also observe some evidence for the φK* final state, and upper limits are given for 22 other decay modes. These results provide the opportunity …

The Extraction And Coordination Chemistry Of An Organophosphorus Ligand: The Synthesis And Characterization Of Organophosphorus Ligands And Dendrimers Using The Michael-Type Addition, Evelyn M. Bond

Chemistry and Chemical Biology ETDs

In chapter 1, the liquid/ liquid extraction of americium (III) from nitric and hydrochloric acid solutions with chloroform solutions of 2, 6 bis[ (diphenylphosphino) methyl] pyridine N, P. P' trioxide (ENOPOPO) is examined. Americium (III) is efficiently extracted from aqueous solutions at high nitric acid concentrations (Dam> 3000 at 6 M HNO3. The ligand dependency data suggest that two ligand molecules are coordinated to the americium. From hydrochloric acid solutions, ENPOPO exhibits modest extraction ability for americium (III) (Dam = 2.2 at5 M HCL) and can be efficiently back extracted from the organic phase at 0.1 M HCL. The ligand …

Algebraic Shape Invariant Models, S Chaturvedi, Ranabir Dutt, Asim Gangopadhyaya, Prasanta K. Panigrahi, C. Rasinariu, Uday P. Sukhatme

Physics: Faculty Publications and Other Works

Motivated by the shape invariance condition in supersymmetric quantum mechanics, we develop an algebraic framework for shape invariant Hamiltonians with a general change of parameters. This approach involves nonlinear generalizations of Lie algebras. Our work extends previous results showing the equivalence of shape invariant potentials involving translational change of parameters with standard SO (2,1) potential algebra for Natanzon type potentials.

Covalently Functionalized Nanotubes As Nanometer-Sized Probes In Chemistry And Biology, Stanislaus S. Wong, Ernesto Joselevich, Adam T. Woolley, Chin Li Cheung, Charles M. Lieber

Barry Chin Li Cheung Publications

Carbon nanotubes combine a range of properties that make them well suited for use as probe tips in applications such as atomic force microscopy (AFM)^{1, 2, 3}. Their high aspect ratio, for example, opens up the possibility of probing the deep crevices⁴ that occur in microelectronic circuits, and the small effective radius of nanotube tips significantly improves the lateral resolution beyond what can be achieved using commercial silicon tips⁵. Another characteristic feature of nanotubes is their ability to buckle elastically^{4, 6}, which makes them very robust while limiting the maximum force that is …

The Virginia Wetlands Report Vol. 13, No. 2, Virginia Institute Of Marine Science

Virginia Wetlands Reports

• Wood Duck. Julie G. Bradshaw
• Striped Killifish. Lyle Varnell
• An Update on the Virginia Geographic Information Network. Marcia R. Berman
• Wild Rice. Pam Mason
• What is riprap? Is it preferred over a bulkhead for shoreline erosion control? William Roberts
• An Introduction to Stressed Habitats. James E. Perry, John E. Anderson, and Arnold F. Theisen

Warfarin: A Forgotten Rodenticide Primary And Secondary Effects Of A Warfarin Bait For Black-Tailed Prairie Dogs, Jeff J. Mach

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

A Probabilistic Approach To Some Of Euler's Number Theoretic Identities, Don Rawlings

Mathematics

Probabilistic proofs and interpretations are given for the q-binomial theorem, q-binomial series, two of Euler's fundamental partition identities, and for q-analogs of product expansions for the Riemann zeta and Euler phi functions. The underlying processes involve Bernoulli trials with variable probabilities. Also presented are several variations on the classical derangement problem inherent in the distributions considered.

Information Storage Capacity Of Incompletely Connected Associative Memories, Holger Bosch, Franz J. Kurfess

Computer Science and Software Engineering

In this paper, the memory capacity of incompletely connected associative memories is investigated. First, the capacity is derived for memories with fixed parameters. Optimization of the parameters yields a maximum capacity between 0.53 and 0.69 for hetero-association and half of it for auto-association improving previously reported results. The maximum capacity grows with increasing connectivity of the memory and requires sparse input and output patterns. Further, parameters can be chosen in such a way that the information content per pattern asymptotically approaches 1 with growing size of the memory.

Quality Of Runoff From Plots Treated With Municipal Sludge And Horse Bedding, Elizabeth L. Busheé, Dwayne R. Edwards, Philip A. Moore Jr.

Biosystems and Agricultural Engineering Faculty Publications

Land application of horse stall bedding and municipal sludge can increase runoff concentrations of nutrients, organic matter, and bacteria as well as steroidal hormones such as estrogen. Concentrations of materials in runoff from sites treated with animal manure can be reduced by aluminum sulfate, or alum [Al₂(SO₄)₃•14H₂O] treatment. The objectives of this study were to assess plots treated with horse stall bedding or municipal sludge for: (a) runoff quality [concentrations of nitrate nitrogen (NO₃-N), ammonia nitrogen (NH₃-N), orthophosphate-phosphorus (PO₄-P), fecal coliform (FC), chemical oxygen demand (COD) …

Review Of The United States And Arms Control: The Challenge Of Leadership By Allan S. Krass, David W. Hafemeister

Physics

No abstract provided.

Circulation, Vol. 5, No. 4, Center For Coastal Physical Oceanography, Old Dominion University

CCPO Circulation

Summer 1998 issue of CCPO Circulation featuring article "Bay Mouth Climatology"

Dynamics Of Rydberg States Of Nitric Oxide Probed By Two-Color Resonant Four-Wave Mixing Spectroscopy, Elizabeth Mccormack, F. Di Teodoro, J. M. Grochocinski, S. T. Pratt

Physics Faculty Research and Scholarship

Two-color resonant four-wave mixing (TC-RFWM) spectroscopy has been used to probe highly excited v = 0 and v = 1 Rydberg states of nitric oxide. Transitions to n = 16-30, v = 0, Rydberg states, and the 8p, 9p, 7f, 8f, 8s, and 9s, v = 1 Rydberg states from the A (2)Sigma(+), v' = 0 and 1 states have been recorded. The decay rate of the 8p and 9p, v = 1 states has been extracted from the observed line profiles by using a recently developed model for the excitation of quasibound resonances in TC-RFWM spectroscopy. Transitions from the …

Guidelines For Granting Aquaculture Leases., Fisheries Wa, Aquaculture Development Council, Aquaculture Council Of Wa

Fisheries management papers

The Western Australian Government is committed to the development of aquaculture within a framework of environmental sustainability. This discussion paper will deal with issues related to the granting of leases for aquaculture and will set out a process for the management of aquaculture leases and associated licences. It will be the basis for presaring the draft Ministerial Policy Guidelines for the granting of aquaculture leases.

Effects Of Randomness And Spatially Dependent Relaxation On Sandpile Models, Isiaka O. Akanbi

Electronic Dissertations and Theses

Random deposition represents the simplest growth model. From a randomly chosen site over the surface, a particle falls vertically until it reaches the top of the interface, whereupon it sticks irreversibly. To include surface relaxation, we allow the deposited particle to diffuse along the surface up to a finite distance, stopping when it finds the position with the lowest height. As a result of the relaxation process, the final interface will be smooth, compared to the model without relaxation. In this research we investigate two types of randomness in the relaxation of sandpile models when the slop at some point …

The Probe, Issue 190 – July 1998

The Probe: Newsletter of the National Animal Damage Control Association

Research, Cooperation Pays Off for Fish Farmers -- Peter Butchko, District Supervisor, USDA-APHIS-WS, Mississippi and NADCA Vice-President, East
Thoughts... Robert H. Giles, Jr., President, NADCA
Book Review : The Wildlife Damage Inspection Handbook, by Stephen Vantassel with Tom Olander; Reviewed by Rex E. Marsh
British Fox Hunting Ban Fails Passage
Recent Coyote Research From Texas: Diets of Coyotes (Canis latrans) in the Edwards Plateau and Trans-Pecos regions of Texas, by J. Harris Glass, S.K. Canon, and D. Rollins
Long-time NADCA Member Robert H. Schmidt Featured in Associated Press Article on Nuisance Animal Control Industry
Research Continues in New Zealand and …

Thermal Stability And Nanostructure Of Cocrpt Longitudinal Recording Media, Mingjun Yu, Mary F. Doerner, David J. Sellmyer

David Sellmyer Publications

We report a systematic study of activation volumes and their correlation with physical grain sizes and thermal stability in CoCrPt media fabricated by magnetron sputtering. Different underlayers and CoCrPt layer thicknesses were used to provide a range of lateral grain sizes, M_Iδ (product of remanence M_I and film thickness δ) values, and remanence coercivities. Two methods, namely the field-sweep-rate dependence of coercivity and measurements of magnetic viscosity and irreversible susceptibility, were used to determine the activation volumes and the results obtained from the two methods are in reasonable agreement. For CoCrPt layer thickness from 10 nm to …

Measurement Of The Photorefractive Grating Phase Shift In A Polymer By An Ac Phase-Modulation Technique, Martin M Liphardt, Stephen Ducharme

Stephen Ducharme Publications

The complex coupling constant of a photorefractive polymer was measured as a function of an applied electric field by use of a modified ac phase modulation technique. We determined that both a photorefractive index grating and a nonphotorefractive absorption grating were present. The electric field dependencies of the amplitude and the phase of the photorefractive gain coefficient were accurately described by standard photorefractive theory. The accuracy of the photorefractive phase shift as measured by this phase-modulation technique was ±1° near phase shifts of 90° and ±3° near phase shifts of 45°.

27. Per Flodin, Otto Vogl, Kerstin Meijer-Flodin

Otto Vogl

No abstract provided.

Seismic Reflection Imaging Of A Geothermal Aquifer In An Urban Setting, Lee Liberty

CGISS Publications and Presentations

A seismic reflection survey that was conducted in downtown Boise, Idaho, to help city planners site a new well for injection of spent geothermal water illustrates some methods to safely and successfully employ a seismic reflection survey in an urban setting. The objective of the seismic survey was to estimate the depth and continuity of a basalt and rhyolite volcanic sequence. Well siting was based on geothermal aquifer depth, location of interpreted faults, projected thermal impact of injection on existing wells, surface pipe extension costs, and public land availability. Seismic acquisition tests and careful processing were used to ensure high-quality …

Resource Law Notes Newsletter, No. 44, Summer Issue, 1998, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.

Inclusive Chemical Characterization Of Tourmaline: Mossbauer Study Of Fe Valence And Site Occupancy, M D. Dyar, M E. Taylor, Tim Lutz, C A. Francis, C V. Guidotti, M Wise

Earth & Space Sciences Faculty Publications

We report here the results of a series of inclusive chemical characterizations, including all elements except oxygen, for a suite of 54 tourmaline samples. A combination of analytical techniques was used to analyze for major and light elements (electron microprobe), Fe3+ and Fe2+ (Mossbauer spectroscopy), H (U extraction), and B, Li, and F (ion microprobe, or SIMS). The B content of the tourmalines studied ranges from 2.86 to 3.26 B per formula unit (pfu) with 31 anions; excess boron is believed to reside in the Si site. Li ranges from 0.0 to 1.44 Li pfu and F contents are 0.0-0.91 …

Canadian Cooperative Wildlife Health Centre, Volume 5-2, Summer 1998

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

CCWHC Involvement with Botulism
The Value of a Complete Necropsy in Controversial Situations
Yersiniosis in Snowshoe Hares - Newfoundland
Mass mortality of young harp seals
Salmonellosis in passerine birds
Canine Parvovirus Type 2 Infection in a Wild Wolf
Presumptive Atoxoplasmosis in Common Grackles
Evidence of Leptospira infection in raccoons from Middlesex and Kent counties, Ontario
Toxicity Events
Canine Distemper Virus in Skunks
Assessment of Risk related to Translocation of Elk into Saskatchewan
Vancouver Island Marmots
Anomalous Black bear
Osprey vs. Muskrat (A Fatal Tie?)
Canine Distemper in Coyotes and a Wolf in Alberta