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Optical Solitons In A Three-State Medium, Talal Ghannam

Masters Theses

When a beam of light propagates within a typical medium, absorption is a common phenomenon. This happens when the frequency of the light is close to a resonant frequency of the atoms composing the medium. But in the past few decades, it has been shown that in certain circumstances, carefully chosen pulse shapes are able to propagate without significant absorption even when the frequency of the light is close to an atomic resonant frequency. It was called Self Induced Transparency (SIT).

This phenomenon was intensively studied in the two-state systems. On the other hand, the three-state systems seems not to …

Comparison Of The Growth Standards Between Saudi And American Children Aged 0-5 Years, Yagob Y. Al-Mazrou, Maysoon M. Al-Amoud, Sirrag E. El-Gizouli, Tawfik Khoja, Khalid Al-Turki, Nasr E. Tantawi, Mohamed K. Khalil, Khwaja M. Aziz

Saudi Medical Journal

OBJECTIVE: To compare the national growth monitoring data with the National Centre for Health Statistics (NCHS) growth standards, which is currently used in the Kingdom of Saudi Arabia (KSA). METHODS: A cross sectional study following World Health Organization criteria in determining sample size was adopted, whereby 24,000 children from 5 regions were selected to be the desired sample. One hundred and two Primary Health Care centers were also selected randomly from the 5 regions, from where the sample was drawn. A special questionnaire was designed for the data collection. A pilot study was carried out to test the study instruments. …

Comparison Of Receptor Efficacies On Vascular Smooth Muscle Contraction, Oommen K. George

Loma Linda University Electronic Theses, Dissertations & Projects

Vascular smooth muscle contraction involves multiple signal-transduction pathways, the interrelations of which are not completely understood. Our objectives in this project were to compare the effects of phenylephrine (alpha₁-adrenergic agonist, angiotensin II (AT₁ agonist), clonidine (alpha₂-adrenergic agonist) and moxondine (alpha₂- adrenergic /I₁-imidazoline agonist) on contraction in the rat-tail artery. Functionally, all these agonists cause contraction, but biochemically there are differences in how the result is achieved. We wanted to determine the role of protein kinase C (PKC) in the functional regulation between AT₁ and alpha₁-adrenergic receptor pathways. In …

Specified Ignorance: A Pedagogical And Cognitive Tool For Learning The Nature And Process Of Science, Robbie V. Mccarty

Teaching and Learning: The Journal of Natural Inquiry & Reflective Practice

No abstract provided.

Scattering Of Elastic Waves In Damaged Media, Liyong Yang, Joseph A. Turner

Nebraska Center for Materials and Nanoscience: Faculty Publications

The scattering of elastic waves in a medium with damage from microcracking is discussed. The influence of damage from penny-shaped microcracks within a homogeneous medium is considered. The microcracks are assumed to be randomly oriented and uniformly distributed. Explicit expressions are derived for the attenuation of longitudinal and shear elastic waves in terms of the damage parameter and the effective elastic moduli of the medium. A generalized tensor-based approach is used such that the results are coordinate free. The derivation is based upon diagrammatic methods. The problem is formulated in terms of the Dyson equation, which is solved for the …

2003/2004 University Of The Pacific General Catalog, University Of The Pacific

Catalogue, Bulletin, Catalog

No abstract provided.

Efficient And Practical Constructions Of Ll/Sc Variables, Prasad Jayanti, Srdjan Petrovic

Computer Science Technical Reports

Over the past decade, LL/SC have emerged as the most suitable synchronization instructions for the design of lock-free algorithms. However, current architectures do not support these instructions; instead, they support either CAS or RLL/RSC (e.g. POWER4, MIPS, SPARC, IA-64). To bridge this gap, this paper presents two efficient wait-free algorithms for implementing 64-bit LL/SC objects from 64-bit CAS or RLL/RSC objects. Our first algorithm is practical: it has a small, constant time complexity (of 4 for LL and 5 for SC) and a space overhead of only 4 words per process. This algorithm uses unbounded sequence numbers. For theoretical interest, …

Earthscoping The Inner Workings Of Magmatic Systems, Michael Hamburger, Stephen R. Mcnutt, Daniel Dzurisin, Jonathan Fink, David P. Hill, Charles Meertens, Chris Newhall, Susan Owen, John A. Power

School of Geosciences Faculty and Staff Publications

In the shadow of one of the world's great volcanic systems, an intensive 3‐day workshop was undertaken to work toward developing a scientific plan for the magmatic systems component of the U.S. National Science Foundation's (NSF) EarthScope Initiative. This NSF‐sponsored workshop was designed to provide direction to the EarthScope planning committee and the NSF in developing scientific, technical, deployment, and management decisions related to the magmatic systems component of EarthScope. The meeting featured a mixture of oral and poster scientific sessions, breakout group and plenary discussions, and a field trip to examine one of the targets of the EarthScope magmatic …

Full Issue

Swiss American Historical Society Review

No abstract provided.

Fourth-Grade Teachers' Perceptions Of Nebraska's State Standards Process In Elementary Schools, Richard J. Beran Jr.

Student Work

The purpose of this study was to explore fourth-grade teachers' perceptions of Nebraska's state standards process. Specifically, research questions sought to determine fourth-grade teachers' perceptions of the possible effects of state standards on schools, students, teachers, and administrators. The questions also explored any differences between subgroups based on teachers' gender, teachers' years of experience, schools' socio-economic status, school enrollment, and percentage of students that have met the state standards.

Water Resources Review - Summer 2003 Vol 16, No 1, Annis Water Resources Institute

AWRI Reviews

No abstract provided.

Junh2003, Robert Kelly

Robert Kelly Manuscripts

From June 2003 Robert Kelly Archive.

Junc2003, Robert Kelly

Robert Kelly Manuscripts

From June 2003 Robert Kelly Archive.

Jefferson Alumni Bulletin – Volume 52, Number 3, June 2003

The Bulletin (formerly the Jefferson Medical College Alumni Bulletin)

Jefferson Alumni Bulletin – Volume 52, Number 3, June 2003 Dean's Column by Dean Thomas J. Nasca ’75, page 4 Update on Transplant Surgery, page 5 The New Jefferson Hospital for Neuroscience and Farber Institute for Neurosciences, page 6 Researchers Show That Human Neural Stem Cells Can Become Dopamine-Making Brain Cells in the Lab, page 8 Evidence of Greater Sensitivity to Addictive Drugs in Adolescence, page 8 New Hope for Patients with Late Stage Parkinson's, page 10 Above and Beyond the Call: Three Alumni Heroes, page 11 The Mother in The Gross Clinic: A Medical Explanation of Her Hand, page …

Microspectrophotometry Of Respiratory Pigments, Karen Yvonne Kavanagh

Doctoral

This research thesis describes the design, construction and optical testing of three fibre-optic microspectrophotometer systems to monitor the reduction of mitochondrial respiratory pigments. The optical and biochemical characteristics of mitochondrial respiration are discussed and the current optical techniques employed in the biochemical analysis of respiratory enzymes are presented. The primary focus of this study is the system parameters surrounding the spectrophotometric determination of mitochondrial respiratory activity. Three separate fibre-optic set-ups are described, which use visible spectrophotometry to measure the reduction of mitochondrial electron carriers from a range of biological sources. Each system is based around the Ocean Optics S1000/S2000 series …

Automatic Processing Of High-Rate, High-Density Multibeam Echosounder Data, Brian R. Calder, Larry A. Mayer

Center for Coastal and Ocean Mapping

Multibeam echosounders (MBES) are currently the best way to determine the bathymetry of large regions of the seabed with high accuracy. They are becoming the standard instrument for hydrographic surveying and are also used in geological studies, mineral exploration and scientific investigation of the earth's crustal deformations and life cycle. The significantly increased data density provided by an MBES has significant advantages in accurately delineating the morphology of the seabed, but comes with the attendant disadvantage of having to handle and process a much greater volume of data. Current data processing approaches typically involve (computer aided) human inspection of all …

The Role Of The Dielectric Barrier In Narrow Biological Channels: A Novel Composite Approach To Modeling Single-Channel Currents, Artem B. Mamonov, Rob D. Coalson, Abraham Nitzan, Maria G. Kurnikova

Chemistry Faculty Research and Publications

A composite continuum theory for calculating ion current through a protein channel of known structure is proposed, which incorporates information about the channel dynamics. The approach is utilized to predict current through the Gramicidin A ion channel, a narrow pore in which the applicability of conventional continuum theories is questionable. The proposed approach utilizes a modified version of Poisson-Nernst-Planck (PNP) theory, termed Potential-of-Mean-Force-Poisson-Nernst-Planck theory (PMFPNP), to compute ion currents. As in standard PNP, ion permeation is modeled as a continuum drift-diffusion process in a self-consistent electrostatic potential. In PMFPNP, however, information about the dynamic relaxation of the protein and the …

Leap-Ing Toward Accountability? Ideology, Practice, And The Voices Of Louisiana Educators, Jim Horn

The Qualitative Report

Louisiana educators at an urban K-5 school participated in a two-year study to share their experiences related to the implementation of a state high-stakes testing program (LEAP 21) that is used to make promotion decisions in grades 4 and 8. Observations, document analysis, and interviews were used to study the development of attitudes, perceptions, and practices related to the use of and consequences emanating from this testing practice. It was found that the state test has far-reaching effects on teaching, curriculum, school climate, students, parents, and school administration. The ideology of testing as a positive reform idea and the practice …

Crystallization Of Sunflower Oil Waxes, Silvana Martini, M. C. Anon

Nutrition, Dietetics, and Food Sciences Faculty Publications

Activation free energies of nucleation (ΔG c ) were calculated using induction times of crystallization measurements. Results showed that ΔG c decreased exponentially as wax concentration increased at a constant crystallization temperature (T c ). In contrast, for a constant supersaturation, ΔG c increased from 12 to 22°C but decreased between 22 and 35°C. Melting behavior of purified waxes and solutions of purified waxes in sunflower oil were studied by DSC after crystallization at fast and slow cooling rates (20 and 1°C/min, respectively). Low supercooling temperatures (T c >65°C) showed an increase in the onset temperature (T 0 ) as …

Where Have All The Flowers Gone?, George E. Rogers

Journal of STEM Teacher Education

No abstract provided.

Usd Magazine Summer 2003 18.4, University Of San Diego

University of San Diego Magazine (1992- )

Features; Campus Almanac; Alumni Almanac; Faculty Almanac; Sports Almanac; Reflections on the Life of a President; Diary of Discovery; Minor Miracles; Alumni Gallery/Class Notes; Alumni Regional Events; In Your Own Words; Calendar

Links Between Snow Cover, Surface Skin Temperature, And Rainfall Variability In The North American Monsoon System, Toshi Matsui, Venkataraman Lakshmi, Eric Small

Faculty Publications

The influence of land–atmosphere interactions on the variability of the North American monsoon system(NAMS) is investigated using the Television Infrared Observation Satellite (TIROS) Operational Vertical Sounder(TOVS) Pathfinder, the Climate Prediction Center (CPC) gauge precipitation, and observed snow water equivalent(SWE). Three hypotheses are tested regarding the connection between land surface variables and precipitationin the NAMS region. First, there is a weak negative correlation between 1 April SWE and subsequent surfacetemperature in the southern Rocky Mountains (SRM) region. However, this connection persists only until Juneand, therefore, cannot directly influence monsoon rainfall in July and August. Second, there is a negativecorrelation between SRM …

Assessment Of Groundwater Resources Using Remote Sensing And Gis, Muna Khalil Al Hammadi

Theses

Geographical Information Systems and Remote Sensing have witnessed an enormous interest in various applications related to geology, hydrology, hydrogeology, and water resources. The use of GIS and remote sensing has become a common practice worldwide. The UAE is no exception. The study of groundwater resources and its sustainability is of prime concern for authorities in the UAE. Although, groundwater may not be suitable, in most cases, for drinking and other potable purposes, it represents the main source for irrigation in the country. About 85% of the total water consumption in the UAE is groundwater.

This study is devoted to the …

Effects Of Lining Cooling Tower Interior Walls On Controlling The Growth Of Legionella Pneumophila, Kamal Rafiq Saeed Jaroor

Theses

The presence of Legionella pneumophila in cooling tower waters is a serious health hazard. If the contaminated mist from the cooling tower is inhaled, Legionnaires' disease could be contracted. Of the 2.4 million cases of pneumonia that occur each year in the United States, an estimated 8,000 to 18,000 are actually cases of Legionnaires' disease. Several factors have been suggested in the literature that enhance the high bacterial count in cooling towers including: temperature, pH, water stagnation, and presence of algae and protozoa.

On few occasions, water samples from the cooling tower at Dubai Hospital tested positive for Legionella pneumophila …

Treatment Of Industrial Wastewater From Food Processing Plant Under Climate Conditions, Saeed Mohamed Wali Abdulla Karmustaji

Theses

This research thesis will study the performance of wastewater treatment plant using a two-phase continuous flow anaerobic/aerobic treatment plant for the treatment of industrial wastewater from a confectionary factory in Dubai. The treatment design is based on anaerobic process under mesophilic conditions (31 +/- 2 °C) range where only the heat of the inlet and the natural climatic temperature are utilized to maintain the reactor operational. An aerobic activated sludge process to achieve the required legal standards follows the anaerobic treatment.

During the anaerobic process, biogas is generated and stored in a collection chamber and linked to an automated flared …

Utilizing Of Elemental Sulfur From Oil And Gas Industry For Soil Treatment, Sultan Saif R. A. Alshamsi

Theses

The United Arab Emirates produces a large quantity of elemental sulfur from oil and gas industry. Elemental sulfur is widely used as soil treatment technique for reducing pH of alkaline soils than other techniques because it is cheaper and safer during treatment.

In this study, different designs mixes were prepared based on its content of sulfur and calcium carbonate. Different application rates of elemental sulfur (0, 1, 2, and 3%S) were added to soils having different amounts of calcium carbonates (i.e., 16.2, 21.2, 26.2, 36.2, 46.2, and 56.2% for basic mix design, and mix designs types I, II, III, IV, …

Optimal Sizing Of Activated Sludge Domestic Wastewater Treatment Processes Considering Uncertainties, Abdulhameed A. Arwani

Theses

A mathematical framework is developed for use in the optimal sizing of a wastewater treatment system comprises an activated sludge system preceded by a primary clarifier. Mathematical models predicting the performance of various unit processes are used to construct the system model. ASM3, used in the developed framework, is among the most recent and comprehensive models that closely describe the biological reactions taking place in the activated sludge system. Cost information functions including capital and operational costs of different system units are also modeled. An optimization problem is formulated with the objective to produce optimal sizes of different units with …

Hydrogeological And Geophysical Studies On Ai Jaww Plain, Ai Ain Area, U.A.E., Hind Saif Ali Ai-Nuaimi

Theses

No abstract provided.

Investigating The Geoelectrical Response Of Hydrocarbon Contamination Undergoing Biodegradation, D. Dale Werkema, Estella A. Atekwana, Anthony L. Endres, William August Sauck, Daniel P. Cassidy

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

A newly proposed geoelectrical model for hydrocarbon contaminated sites predicts high conductivities coincident with the contaminated zone as opposed to the traditionally accepted low conductivity. The model attributes the high conductivities to mineral weathering resulting from byproducts of microbial redox processes. To evaluate this conductive model, in situ vertical conductivity measurements were acquired from a light non-aqueous phase liquid (LNAPL) contaminated site. The results showed high conductivities coincident with the zone of contamination and within the smear zone influenced by seasonal water table fluctuations. We infer this zone as an active zone of biodegradation and suggest significant microbial degradation under …

Vertical Nanowire Transistor In Flexible Polymer Foil, Jie Chen, Rolf Könenkamp

Physics Faculty Publications and Presentations

Fabrication and operation of a vertical nanowire field-effect transistor is reported. The device is prepared by growing vertical wires in the cylindrical pores of a polymer foil stack. The nanowirediameter is approximately 100 nm, the packing density up to 10⁸ cm⁻². The polymer foil stack consists of two polymer layers and an intermediate metal layer. Cylindrical holes are prepared in this stack by using fast ion irradiation and subsequent etching. Well-defined cylindrical openings with diameters between 50 and 150 nm are obtained. The semiconductor growth involves electrodeposition of the p-type quaternary compound CuSCN. Electrical measurements on first devices show transistor …