Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Louisiana State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 6301 - 6330 of 8031

Full-Text Articles in Entire DC Network

Louisiana Agriculture Winter, 2002, Lsu Agcenter Jan 2002

Louisiana Agriculture Winter, 2002, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

Go to article

Direct Evidence For Neutrino Flavor Transformation From Neutral-Current Interactions In The Sudbury Neutrino Observatory, Q. R. Ahmad, R. C. Allen, T. C. Andersen, J. D.Anglin, J. C. Barton, E. W. Beier, M. Bercovitch, J. Bigu, S. D. Biller, R. A. Black, I. Blevis, R. J. Boardman, J. Boger, E. Bonvin, M. G. Boulay, M. G. Bowler, T. J. Bowles, S. J. Brice, M. C. Browne, T. V. Bullard, G. Bühler, J. Cameron, Y. D. Chan, H. H. Chen, M. Chen, X. Chen, B. T. Cleveland, E. T.H. Clifford Jan 2002

Direct Evidence For Neutrino Flavor Transformation From Neutral-Current Interactions In The Sudbury Neutrino Observatory, Q. R. Ahmad, R. C. Allen, T. C. Andersen, J. D.Anglin, J. C. Barton, E. W. Beier, M. Bercovitch, J. Bigu, S. D. Biller, R. A. Black, I. Blevis, R. J. Boardman, J. Boger, E. Bonvin, M. G. Boulay, M. G. Bowler, T. J. Bowles, S. J. Brice, M. C. Browne, T. V. Bullard, G. Bühler, J. Cameron, Y. D. Chan, H. H. Chen, M. Chen, X. Chen, B. T. Cleveland, E. T.H. Clifford

Faculty Publications

Observations of neutral-current [Formula presented] interactions on deuterium in the Sudbury Neutrino Observatory are reported. Using the neutral current (NC), elastic scattering, and charged current reactions and assuming the standard [Formula presented] shape, the [Formula presented] component of the [Formula presented] solar flux is [Formula presented] for a kinetic energy threshold of 5 MeV. The non- [Formula presented] component is [Formula presented], [Formula presented] greater than zero, providing strong evidence for solar [Formula presented] flavor transformation. The total flux measured with the NC reaction is [Formula presented], consistent with solar models. © 2002 The American Physical Society.

Go to article

Single-Photon Quantum-Nondemolition Detectors Constructed With Linear Optics And Projective Measurements, Pieter Kok, Hwang Lee, Jonathan P. Dowling Jan 2002

Single-Photon Quantum-Nondemolition Detectors Constructed With Linear Optics And Projective Measurements, Pieter Kok, Hwang Lee, Jonathan P. Dowling

Faculty Publications

Optical quantum-nondemolition devices can provide essential tools for quantum information processing. Here, we describe several optical interferometers that signal the presence of a single photon in a particular input state without destroying it. We discuss both entanglement-assisted and nonentanglement-assisted interferometers, with ideal and realistic detectors. We found that the existing detectors with 88% quantum efficiency and single-photon resolution can yield output fidelities of up to 89%, depending on the input state. Furthermore, we construct expanded protocols to perform quantum-nondemolition detections of single photons that leave the polarization invariant. For detectors with 88% efficiency, we found polarization-preserving output fidelities of up …

Go to article

Narrowing Of Electromagnetically Induced Transparency Resonance In A Doppler-Broadened Medium, Ali Javan, Olga Kocharovskaya, Hwang Lee, Marlan O. Scully Jan 2002

Narrowing Of Electromagnetically Induced Transparency Resonance In A Doppler-Broadened Medium, Ali Javan, Olga Kocharovskaya, Hwang Lee, Marlan O. Scully

Faculty Publications

We derive an analytic expression for the linewidth of electromagnetically induced transparency (EIT) resonance in a Doppler-broadened system. It is shown here that for relatively low intensity of the driving field the EIT linewidth is proportional to the square root of intensity and is independent of the Doppler width, similar to the laser-induced line narrowing effect described by Feld and Javan. In the limit of high intensity we recover the usual power-broadening case where the EIT linewidth is proportional to the intensity and inversely proportional to the Doppler width. © Oxford University Press 2002.

Go to article

The Effect Of Reactor Geometry On Frontal Polymerization Spin Modes, John A. Pojman, Jonathan Masere, Enrico Petretto, Mauro Rustici, Do Sung Huh, Min Suk Kim, Vladimir Volpert Jan 2002

The Effect Of Reactor Geometry On Frontal Polymerization Spin Modes, John A. Pojman, Jonathan Masere, Enrico Petretto, Mauro Rustici, Do Sung Huh, Min Suk Kim, Vladimir Volpert

Faculty Publications

Using reactors of different sizes and geometries the dynamics of the frontal polymerization of 1,6-hexanediol diacrylate (HDDA) and pentaerythritol tetraacrylate (PETAC), with ammonium persulfate as the initiator were studied. For this system, the frontal polymerization exhibits complex behavior that depends on the ratio of the monomers. For a particular range of monomers concentration, the polymerization front becomes nonplanar, and spin modes appear. By varying the reactor diameter, we experimentally confirmed the expected shift of the system to a greater number of "hot spots" for larger diameters. For square test tubes a "zig-zag" mode was observed for the first time in …

Go to article

The Depth Of Porphyrin In A Membrane And The Membrane's Physical Properties Affect The Photosensitizing Efficiency, Adina Lavi, Hana Weitman, Robert T. Holmes, Kevin M. Smith, Benjamin Ehrenberg Jan 2002

The Depth Of Porphyrin In A Membrane And The Membrane's Physical Properties Affect The Photosensitizing Efficiency, Adina Lavi, Hana Weitman, Robert T. Holmes, Kevin M. Smith, Benjamin Ehrenberg

Faculty Publications

Photosensitized biological processes, as applied in photodynamic therapy, are based on light-triggered generation of molecular singlet oxygen by a membrane-residing sensitizer. Most of the sensitizers currently used are hydrophobic or amphiphilic porphyrins and their analogs. The possible activity of the short-lived singlet oxygen is limited to the time it is diffusing in the membrane, before it emerges into the aqueous environment. In this paper we demonstrate the enhancement of the photosensitization process that is obtained by newly synthesized protoporphyrin derivatives, which insert their tetrapyrrole chromophore deeper into the lipid bilayer of liposomes. The insertion was measured by fluorescence quenching by …

Go to article

Microstructure And Some Functional Properties Of Spray Dried Cheddar Whey Concentrated By Ultrafiltration Or Combination Of Ultrafiltration And Vacuum Evaporation, Kayanush J. Aryana, Zahur Z. Haque Jan 2002

Microstructure And Some Functional Properties Of Spray Dried Cheddar Whey Concentrated By Ultrafiltration Or Combination Of Ultrafiltration And Vacuum Evaporation, Kayanush J. Aryana, Zahur Z. Haque

Faculty Publications

In order to study the influence of the vacuum evaporation (VE) process on the functionality of whey protein concentrates (WPC's), Cheddar WPC's were produced with and without VE, viz. by i) ultrafiltration (UF) and spray drying (SD) (UFSD), and by ii) UF, VE and SD (UFVESD). Geling properties and interfacial microstructure around residual fat were studied by transmission electron microscopy. Both WPC's were hydrated with 0.1 M NaCl at pH 7.0 (10% protein w/v) and gels were made in glass tubes by heating for 15 min at 90°C. Electron dense membrane like structures were seen at the oil-water interface of …

Go to article

Book Reviews Jan 2002

Book Reviews

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

Go to article

One-Week Stability Of Forearm Venous Outflow As Assessed By Venous Occlusion Plethysmography, Jennifer Pitre Ortego Jan 2002

One-Week Stability Of Forearm Venous Outflow As Assessed By Venous Occlusion Plethysmography, Jennifer Pitre Ortego

LSU Master's Theses

The aim of this study was to test short-term and long-term reliability of venous outflow (VO) indices using the venous occlusion plethysmography technique. A secondary purpose was to compare venous measures to age, gender and various anthropometrical measures. The study group consisted of apparently healthy males and females, aged 18 to 80 years. Venous indices were under measures on two occasions (1 week apart), under the conditions of rest and following 5 min of upper arm occlusion. Venous outflow measures were calculated from the area under the curve (AUC) as well as the plethysmographic curve technique at the time .5 …

Go to article

Surfactant-Induced Relative Permeability Modifications For Oil Recovery Enhancement, Subhash C. Ayirala Jan 2002

Surfactant-Induced Relative Permeability Modifications For Oil Recovery Enhancement, Subhash C. Ayirala

LSU Master's Theses

Surfactants have been considered for enhanced oil recovery by reduced oil-water interfacial tension. However, these surfactants may enhance oil recovery via wettability alteration as well. This study experimentally determines the influence of surfactant type and concentration on oil recovery, oil-water relative permeabilities and wettability in reservoir rocks. Several coreflood experiments were conducted using Yates reservoir fluids in Berea rocks and two types of surfactants (nonionic and anionic) in varying concentrations. A coreflood simulator was used to calculate oil-water relative permeabilities by history matching recovery and pressure drop measured during the corefloods. These relative permeability variations were interpreted using Craig's rules-of-thumb …

Go to article

Human Heir, Andrew Jay Saluti Jan 2002

Human Heir, Andrew Jay Saluti

LSU Master's Theses

Human heir catalogues the mechanism as living being through character and interaction. The life of basic machines such as hand tools and anvils is characterized by the interaction with other mechanical forms and the collaboration with their creator, the human machine. The concepts of function, personality, relevance, and existence are observed on seemingly lifeless elements, and the simplicity of the human mechanism is explored.

Go to article

Xeriscape Guidelines Adapted To Residential Gardens In Cyprus, Elli George Georgiou Jan 2002

Xeriscape Guidelines Adapted To Residential Gardens In Cyprus, Elli George Georgiou

LSU Master's Theses

One of the major problems that my country, Cyprus, faces is water scarcity. In the last five to ten years, the problem has become more serious because of a series of droughts that have left the island with limited water. As a result, Cypriots keep their gardens to a minimum or they abandon their gardens due to water shortage. This attitude of Cypriots toward their gardens was the inspiration of this thesis topic. The idea of Xeriscape and the seven guidelines of Xeriscape that were first introduced and organized by the Denver Water Department in Colorado are directly related to …

Go to article

Harper Lee's To Kill A Mockingbird As Adapted By Christopher Sergel: A Thesis In Directing, Andrew Vastine Stabler Jan 2002

Harper Lee's To Kill A Mockingbird As Adapted By Christopher Sergel: A Thesis In Directing, Andrew Vastine Stabler

LSU Master's Theses

This thesis describes the directorial process of a production of Christopher Sergels's adaptation of Harper Lee's novel To Kill a Mockingbird. It follows the process of preproduction through rehearsals. It makes use of the influences of the prior history and the recent educational experience of the director. Throughout it accesses the choices made and concludes with conclusions on the final product.

Go to article

Liminal Recollection...Between Memory And Reality, Blake Jamison Williams Jan 2002

Liminal Recollection...Between Memory And Reality, Blake Jamison Williams

LSU Master's Theses

In the year I applied to graduate school, the objects in my life acquired a distinct preciousness after my grandparents passed away within three months of each other. I realized that the things we collect, and those that surround us, reveal our narratives and silently map our personalities. I discovered that material items triggered memories for me specific to their function and relationship to me. My grandmother’s set of ten figurines reminded me of the many times we would sit and drink tea together. I became acutely aware of material items that were results of human actions. A used teabag …

Go to article

Prenursing Students' Perceptions Of The Nursing Profession, Essie Dee Scott Cockrell Jan 2002

Prenursing Students' Perceptions Of The Nursing Profession, Essie Dee Scott Cockrell

LSU Master's Theses

The primary purpose of this study is to determine the nursing perceptions among prenursing students enrolled in a baccalaureate prenursing program. Objectives in the study included describing undergraduate baccalaureate prenursing student on selected demographic characteristics such as age, gender, ethnic background, etc., determining the perceptions of students about the nursing profession, and determining if a relationship existed between students' perceptions of nursing and selected personal characteristics such as classification, reason for choosing nursing, area of nursing practice most interested, etc. A total of 207 (66.35%) prenursing students enrolled in prerequisite courses for a baccalaureate nursing program participated in the study. …

Go to article

Chronophobia: Doing Time, Rosemary Stoltz Hill Jan 2002

Chronophobia: Doing Time, Rosemary Stoltz Hill

LSU Master's Theses

Chronophobia is the fear of time—characterized by panic, anxiety, and claustrophobia. Also known as prison neurosis, it may be the most common anxiety disorder in prison inmates. Sooner or later, almost all prisoners suffer chronophobia to some degree and become terrified by the duration and immensity of time. This is often called going “stir crazy.” The work in this installation subjectively explores interpretations of the passage of time through various multimedia experiences. Interactivity is a key feature of several installation components. There is also limited use of traditional print media graphics. References to time in music, literature and film are …

Go to article

Utilization Of Rice Bran By Pythium Irregulare For Lipid Production, Hui Zhu Jan 2002

Utilization Of Rice Bran By Pythium Irregulare For Lipid Production, Hui Zhu

LSU Master's Theses

This research investigated the feasibility of utilizing rice bran as feedstock for submerged fermentation of Pythium irregulare to produce fungal lipids, which contain polyunsaturated fatty acids (PUFAs) including arachidonic acid (AA, C20:4n6) and eicosapentaenoic acid (EPA, C20:5n3). The fungal nutrient requirements, temperature characterization and growth modeling were determined in glucose-yeast extract media. Sixteen media combinations based on a 24 factorial design with four levels of glucose and yeast extract ranged from 1% to 4% and 0.25% to 1%, respectively, and corresponding carbon/nitrogen ratio (C/N) ranged from 4 to 64, were examined. The suitable C/N for Pythium irregulare growth ranged from …

Go to article

Fecal Coliform Concentration In Surface Runoff From Pastures With Applied Dairy Manure, Alyson Kristine Bertges Hubbs Jan 2002

Fecal Coliform Concentration In Surface Runoff From Pastures With Applied Dairy Manure, Alyson Kristine Bertges Hubbs

LSU Master's Theses

This study examined the magnitude of release of fecal coliform indicator bacteria in surface runoff from pasture amended with dairy manure. The experiment was conducted at Southeast Research Station in Franklinton, Louisiana between March and June, 2001. The experiment was designed to compare the effects of two methods of manure application on fecal coliform release. Manure application simulating natural deposition by cattle (Treatment A) was compared to that of land application of manure as fertilizer (Treatment B). Application of inorganic fertilizer was used as the control. Each Treatment was applied to three field plots. Simulated rainfalls were conducted on plots …

Go to article

Responses Of African-American Girls To Two Types Of Folktales, Corrie Kiesel Jan 2002

Responses Of African-American Girls To Two Types Of Folktales, Corrie Kiesel

LSU Master's Theses

This study examined the responses of two 11-year-old African-American girls to two folktales: one with a passive female protagonist and one with an active female protagonist. The goal of the study was to add to the small body of previous research on children’s responses to folktales by exploring the opinions of African-American girls, who had been thus far overlooked, and to illuminate areas for future research. Data were collected through a series of four interviews with each girl and analyzed using qualitative research methodologies. Some of the data reflected previous findings from studies of Caucasian girls’ responses to folktales. The …

Go to article

Modeling Adsorption Of Cane Sugar Colorant In Packed-Bed Ion Exchangers, Hugh Anthony Broadhurst Jan 2002

Modeling Adsorption Of Cane Sugar Colorant In Packed-Bed Ion Exchangers, Hugh Anthony Broadhurst

LSU Master's Theses

The removal of cane sugar solution colorant by packed-bed ion exchangers was modeled using a linear driving force (LDF) adsorption model. Adsorption of colorant is of interest to the developers of the White Sugar Mill (WSM) process as it is a complex subject. The problem is that color is an indiscrete mixture of many components making it difficult to measure and even more challenging to model. Colorant formation was investigated using gel permeation chromatography (GPC) with the objective of developing a method to define pseudo-components representative of cane sugar solution colorants. WSM is a process for producing white sugar directly …

Go to article

Plasmid-Mediated Expression Of Foreign Genes In Ehrlichia Canis, Langston Dolphus Hull Jan 2002

Plasmid-Mediated Expression Of Foreign Genes In Ehrlichia Canis, Langston Dolphus Hull

LSU Doctoral Dissertations

Ehrlichia canis is the etiologic agent of “tropical canine pancytopenia”, or canine ehrlichiosis. The impetus for this research was to overcome the lack of any reliable means of elucidating the genetic profiles of these illusive and historically difficult to manipulate organisms. The use of a broad-host range plasmid greatly facilitated the determination of an electro-transformation protocol. The transforming plasmid possesses a chloramphenicol antibiotic resistance gene marker (chloramphenicol acetyltransferase [CAT] gene), and a visual reporter gene marker, the Green Fluorescent Protein (GFP) gene. With primer sets designed to specifically amplify these two plasmid encoded gene markers, thus verifying the presence of …

Go to article

Overpressuring, Diagenesis, And Fluid Flow At The Matagorda Island 519 Field, Offshore Texas, Gulf Of Mexico, Kera Gautreau Spears Jan 2002

Overpressuring, Diagenesis, And Fluid Flow At The Matagorda Island 519 Field, Offshore Texas, Gulf Of Mexico, Kera Gautreau Spears

LSU Master's Theses

The relations between overpressuring, diagenesis, and fluid flow in sedimentary basins are complex and multifaceted. The Matagorda Island 519 field (MI 519), offshore Texas, provides an excellent area for investigating some of these relations. The top of overpressure at MI 519 occurs at a depth of 3.5 to 3.8 km in a Lower Miocene deltaic sequence. On the basis of log-derived lithostratigraphy, the pressure seal does not appear to be lithologic in origin. Geochemical, mineralogical, and cuttings information indicate instead that the precipitation of diagenetic calcite and possibly quartz cements has been the major factor in seal development. Stratigraphic variation …

Go to article

The New Orleans Press-Radio War And Huey P. Long, 1922-1936, Brian David Collins Jan 2002

The New Orleans Press-Radio War And Huey P. Long, 1922-1936, Brian David Collins

LSU Master's Theses

The introduction of radio in America in the 1920s was greeted with much fanfare by the general public and by newspapers and politicians as well. Its popularity soared as radio sets became cheaper and more accessible. Newspapers were eager to boost their circulations by featuring the latest craze; many newspapers even started their own stations as a means of publicity. As the country sank deeper into the Great Depression in the 1930s, the relationship between the country's press and radio worsened. The newspapers felt threatened that radio would take away their advertising revenue in addition to stealing their news dissemination …

Go to article

Mitigation Strategies For The Removal Of Rinsate Organics And Lithium-Based Dyes From Textile Effluents, Kathryn W. Huddle Jan 2002

Mitigation Strategies For The Removal Of Rinsate Organics And Lithium-Based Dyes From Textile Effluents, Kathryn W. Huddle

LSU Master's Theses

Governmental agencies have set regulatory values on the concentration of dye-related color that can be released in textile mill effluents. A proprietary biotic and abiotic technology treatment train was built at a candidate facility in northwestern Georgia to reduce the organic content and dye-related color content in the textile mill’s effluent. Laboratory experimentation began with bench scale 4 L immobilized microbe (IMBR) bioreactor tests to biologically treat primary wastewater streams, namely skein dye and space dye, from this candidate facility. The biological treatment reduced the organic content levels, expressed as chemical oxygen demand (COD), from 3185±30 to 290±20 mg/L (COD …

Go to article

Prediction Of Transient Head On Seepage Path Using Boundary Fitted Coordinate (Bfc) System, Sherly Hartono Jan 2002

Prediction Of Transient Head On Seepage Path Using Boundary Fitted Coordinate (Bfc) System, Sherly Hartono

LSU Master's Theses

One of the main causes of levee failure is seepage through levee. This seepage can cause weakening in the levee structure, which in turn can cause sudden levee failure or overtopping of the levee due to levee depression. The purpose of this study is to determine the transient head on the seepage path due to changing water level during flood period. Transient seepage problems are very important as critical condition can occur during this time rather than during steady state condition. Seepage path through a levee can be predicted using the Boundary Fitted Coordinate (BFC) system method. The physical coordinate …

Go to article

From Print To Online World: Examining The Predictors That Influence The Level Of Interactivity Of Newspaper's World Wide Web Pages, Qian Zeng Jan 2002

From Print To Online World: Examining The Predictors That Influence The Level Of Interactivity Of Newspaper's World Wide Web Pages, Qian Zeng

LSU Master's Theses

The purpose of this study is to examine the predictors that influenced the interactivity of U.S. daily newspapers Web sites, namely the market size of newspapers, newspapers ownership, the number of online newspaper technical staff, length of newspaper Web site existence. Whether a national newspaper has different interactive Web site from a local newspaper is also studied. A content analysis of 106 U.S. daily newspapers Web sites found that market size and length of time newspapers having Internet presence sites are correlated to the interactive level of newspapers Web sites. National newspapers are also found having more interactive Web sites …

Go to article

The United States 1989 Military Intervention In Panama: A Just Cause?, William Harrision Huff Iv Jan 2002

The United States 1989 Military Intervention In Panama: A Just Cause?, William Harrision Huff Iv

LSU Master's Theses

American involvement in Panama dates back to 1903 when the United States helped bring independence to the Republic and soon after began construction of the Panama Canal. As the guarantor of Panamanian sovereignty, the U.S in the ensuing decades contributed to a non-democratic environment in Panama by supporting a series of dictators who promised stability in the region. The U.S. National Security policy just before Operation JUST CAUSE finally acknowledged the brutality of the Panamanian dictator, Manuel Noriega, forcing Washington to attempt numerous unsuccessful diplomatic maneuvers in an effort to avoid military intervention. Once combat operations commenced, the justification, necessity …

Go to article

Supercritical Carbon Dioxide Extraction Of Lipids From Raw And Bioconverted Rice Bran, Rohit Badal Jan 2002

Supercritical Carbon Dioxide Extraction Of Lipids From Raw And Bioconverted Rice Bran, Rohit Badal

LSU Master's Theses

Rice bran is often discarded despite its nutritional value because the oil in rice bran easily becomes rancid. This has necessitated the search for a method for utilizing the rice bran. The present study involves the application of supercritical fluid extraction (SFE) and bioprocessing (microbial growth on rice bran media) for increasing the value of the rice bran to produce products of high value (nutraceuticals) with superior health benefit. This study was focused on determining the effect of particle size (>48 mesh and 16-48 mesh) and biotreatment on the yield and quality of rice bran oil. SFE technique (40°C, …

Go to article

The Effects Of Fall Coldfront Passages On The Nekton Community In A Tidal Creek In Port Fourchon, La, As Monitored By Hydroacoustics, David J. Harmon Jan 2002

The Effects Of Fall Coldfront Passages On The Nekton Community In A Tidal Creek In Port Fourchon, La, As Monitored By Hydroacoustics, David J. Harmon

LSU Master's Theses

Split-beam hydroacoustic sampling with two, 420 KHz, 2x6 degree elliptical transducers was evaluated as a tool to quantify nekton movements in a Louisiana estuary. I measured the effects of atmospheric cold front passages on nekton in a tidal creek in Port Fourchon, LA during the fall of 2000. Six “fronts” were sampled between October 6 and December 18, 2000. Nekton density ranged from 0 to 24.4 fish/m3 with an overall mean of 2.44 fish/m3. Net samples were taken to supplement the acoustic data with species composition data. Species composition changed from October to December. A higher number …

Go to article

Wavelength Assignment In All-Optical Networks For Mesh Topologies, Prabhulaiah Bijja Jan 2002

Wavelength Assignment In All-Optical Networks For Mesh Topologies, Prabhulaiah Bijja

LSU Master's Theses

All-Optical Networks employing Dense Wavelength Division Multiplexing (DWDM) are believed to be the next generation networks that can meet the ever-increasing demand for bandwidth of the end users. This thesis presents some new heuristics for wavelength assignment and converter placement in mesh topologies. Our heuristics try to assign the wavelengths in an efficient manner that results in very low blocking probability. We propose novel static and dynamic assignment schemes that outperform the assignments reported in the literature even when converters are used. The proposed on-line scheme called "Round-Robin" assignment outperforms previously proposed strategies such as first-fit and random assignment schemes. …

Go to article

First Prev Next Last