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

Digital Commons Network™

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

University of Central Florida

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 5161 - 5190 of 7872

Full-Text Articles in Entire DC Network

Central Florida Future, Vol. 36 No. 37, January 26, 2004 Jan 2004

Central Florida Future, Vol. 36 No. 37, January 26, 2004

Central Florida Future

Bush seeks 7.5 percent tuition hike; filibuster delays vote on Patriot Act again; Trustees delay gay discrimination vote; NASA celebrates second landing on Mars.

Go to article

Genetic Engineering Of Plant Chloroplasts, Henry Daniell, Bruce Mcfadden Jan 2004

Genetic Engineering Of Plant Chloroplasts, Henry Daniell, Bruce Mcfadden

UCF Patents

Novel chimeric constructions and methods for their use are provided for expression of exogenous genes in a plant chloroplast. Particularly, expression is achieved by the use of a chloroplast or bacterial 5' untranslated region in the expression cassette. The expression cassette may be integrated into the chloroplast genome by the use of chloroplast DNA flanking sequences, or may replicate autonomously if provided with a chloroplast origin of replication. Plants and cells containing the transformed chloroplasts are also provided. The constructs may be used with both monocotyledenous and dicotyledenous chloroplasts.

Go to article

Central Florida Future, Vol. 36 No. 34, January 15, 2004 Jan 2004

Central Florida Future, Vol. 36 No. 34, January 15, 2004

Central Florida Future

Homecoming queen surrenders her title; Plus-minus grades still drawing gripes; Progressive Council cleared of charges; School seeking prestigious honor society membership.

Go to article

Central Florida Future, Vol. 36 No. 33, January 12, 2004 Jan 2004

Central Florida Future, Vol. 36 No. 33, January 12, 2004

Central Florida Future

SGA allows student laptops in election; Greek students look to rebuild; School can't afford to destroy greenhouse; Senator shocks colleagues with a sudden resignation.

Go to article

The Effect Of Tourist Theft On Future Travel Decisions, Judith Lynn Holcomb Jan 2004

The Effect Of Tourist Theft On Future Travel Decisions, Judith Lynn Holcomb

Electronic Theses and Dissertations

Past research has shown that theft is a prevalent crime against tourists. This study's purpose was to determine the effects of past incidents of personal theft on tourists' future decisions to travel by analyzing and comparing those who have experienced personal theft to those who heard of such incidents through personal accounts of friends or family. The findings, which were taken from a survey of 215 respondents, revealed that that experiencing personal theft, or knowing of someone who has, is not a deterrent for visiting a destination where the theft occurred. Results also showed that one aspect of theft that …

Go to article

University Of Central Florida 2003-2004 Fact Book, University Of Central Florida Jan 2004

University Of Central Florida 2003-2004 Fact Book, University Of Central Florida

Historical Fact Book and Enrollment

Historical fact book and enrollment data for the University of Central Florida.

Go to article

The Learning Marketspace, January 2004, Bob Heterick, Carol Twigg Jan 2004

The Learning Marketspace, January 2004, Bob Heterick, Carol Twigg

The Learning MarketSpace (4/03 - 4/14)

No abstract provided.

Go to article

Molecular Typing Of Mycobacterial Isolates Cultured From The Tissue Of Inflammatory Bowel Disease (Crohn's Disease) Patients, Leanne M. Adams Jan 2004

Molecular Typing Of Mycobacterial Isolates Cultured From The Tissue Of Inflammatory Bowel Disease (Crohn's Disease) Patients, Leanne M. Adams

Electronic Theses and Dissertations

The role of Mycobacterium avium subsp paratuberculosis (MAP) in the etiology and pathogenesis of inflammatory bowel disease (IBD) including Crohn's Disease (CD), has been investigated. The fastidious characteristics and cross reactivity of MAP with other members in Mycobacteria have produced significant challenges in their detection and identification. In this two year pilot study, an array of three PCR molecular assays based on the detection of sequences from the16S rRNA, IS1245, and IS900 genes, belonging to members of the MAC, have been developed and optimized into a common protocol to be used as a rapid and accurate diagnostic tool regarding M. …

Go to article

Interactions Between The Nudibranch Okenia Zoobotryon And Its Bryozoan, Nicole Robinson Jan 2004

Interactions Between The Nudibranch Okenia Zoobotryon And Its Bryozoan, Nicole Robinson

Electronic Theses and Dissertations

In the Indian River Lagoon, the nudibranch Okenia zoobotryon and its egg masses are found attached to the bryozoan Zoobotryon verticillatum throughout the year. Okenia zoobotryon is thought to live, feed, and reproduce exclusively on Z. verticillatum, which would make this a very specialized predator-prey interaction. The primary goal of my study was to document certain aspects of the ecological and chemical relationships between Z. verticillatum and O. zoobotryon. Specifically, I wanted to understand the cues used by the nudibranch to locate and remain on Z. verticillatum. Population surveys on Z. verticillatum, as well as other potential hosts, were performed. …

Go to article

Extracullular Atp Regulates Il-1beta Release From Microglial Cells Via Purinergic Receptor After In Vitro Trauma, Chengya Liang Jan 2004

Extracullular Atp Regulates Il-1beta Release From Microglial Cells Via Purinergic Receptor After In Vitro Trauma, Chengya Liang

Electronic Theses and Dissertations

Traumatic brain injury (TBI) induces a state of microglialactivation, which includes upregulation of macrophage functions and release inflammatory mediators such as certain inflammatory cytokines. Current literature suggests that interleukin-1Beta is an important cytokine mediator, which is dramatically increased after brain injury. Previous studies indicate that ATP is released by traumatically injured astrocytes and serves as a cell-to-cell mediator through purinergic receptors after in vitro injury. However, the mechanism of interleukin-1Beta release after traumatic brain injury remains poorly defined and is difficult to study using in vivo models. Using an in vitro model for traumatic brain injury (cell strain or stretch), …

Go to article

Critical Digital Infrastructure Protection: An Investigatoin Into The Intergovernmental Activities Of Information Technology Directors In Florida Counties, Joah Nicole Devenny Jan 2004

Critical Digital Infrastructure Protection: An Investigatoin Into The Intergovernmental Activities Of Information Technology Directors In Florida Counties, Joah Nicole Devenny

Electronic Theses and Dissertations

As cyber attacks become more sophisticated, the risk to all networked computer systems increases. Whether public or private, whether federal, state, or local, the threat is equally real. Consequently, local governments must respond accordingly to understand the threats, take measures to protect themselves, and determine how to respond in the event of a system breach. Additionally, since cyber criminals do not respect geographic or administrative boundaries, local leaders must be prepared to instantly interact with other governments, agencies, and departments to suppress an attack. Guided by the theory of intergovernmental management (IGM), this exploratory research investigated how Information Technology (IT) …

Go to article

Neural Networks Satisfying Stone-Weiestrass Theorem And Approximating, Pinal Thakkar Jan 2004

Neural Networks Satisfying Stone-Weiestrass Theorem And Approximating, Pinal Thakkar

Electronic Theses and Dissertations

Neural networks are an attempt to build computer networks called artificial neurons, which imitate the activities of the human brain. Its origin dates back to 1943 when neurophysiologist Warren Me Cello and logician Walter Pits produced the first artificial neuron. Since then there has been tremendous development of neural networks and their applications to pattern and optical character recognition, speech processing, time series prediction, image processing and scattered data approximation. Since it has been shown that neural nets can approximate all but pathological functions, Neil Cotter considered neural network architecture based on Stone-Weierstrass Theorem. Using exponential functions, polynomials, rational functions …

Go to article

Survival Of Mycobacterium Avium Subspecies Paratuberculosis In The Pol, John Rumsey Jan 2004

Survival Of Mycobacterium Avium Subspecies Paratuberculosis In The Pol, John Rumsey

Electronic Theses and Dissertations

Mycobacterium avium subspecies paratuberculosis (map) is an intracellular pathogen that is known to parasitize macrophages and monocytes. Map infiltrates gastrointestinal tract host tissue where it is the known etiological agent of johne's disease in ruminants and implicated in the etiology of crohn's disease in humans. Map's ability to survive within macrophages enables it to disseminate throughout the rest of the host, possibly infecting other circulating blood leukocytes. In this study, the survival and fate of map strain atcc 43015 (human isolate) following phagocytosis was determined using in vitro murine macrophage cell line j774a.1 and polymorphonuclear cells (pmnc's) from five crohn's …

Go to article

The Ecology Of Drift Algae In The Indian River Lagoon, Florida, Julie Lynnae Liss Jan 2004

The Ecology Of Drift Algae In The Indian River Lagoon, Florida, Julie Lynnae Liss

Electronic Theses and Dissertations

To gain an understanding of the ecology of drift algae in the Indian River Lagoon system along the east coast of central Florida, four questions were addressed: 1) What is the composition and rate of accumulation of drift? 2) How much movement and turnover occurs within drift accumulations? 3) Do growth rates differ for drift versus attached algae? 4) Is there a difference in photosynthetic performance in drift versus attached algal species? Manipulative field and laboratory experiments were conducted to address these questions with the green macroalga Codium decorticatum and the red macroalga Gracilaria tikvahiae. Changes in pigment concentration and …

Go to article

Hydrogen Sulfide Flux Measurements And Dispersion Modeling From Constr, Sangho Eun Jan 2004

Hydrogen Sulfide Flux Measurements And Dispersion Modeling From Constr, Sangho Eun

Electronic Theses and Dissertations

Odor problems are a common complaint from residents living near landfills. Many compounds can cause malodorous conditions. However, hydrogen sulfide (h2s) has been identified as a principal odorous component from construction and demolition (c&d)debris landfills. Although several studies have reported the ambient concentrations of h2s near c&d landfills, few studies have quantified emission rates of h2s. The most widely used and proven technique for measuring gas emission rates from landfills is the flux chamber method. Typically the flux chamber is a cylindrical enclosure device with a spherical top which limits the gas emission area. Pure zero grade air is introduced …

Go to article

University Of Central Florida Libraries, Annual Report 2003-2004, Ucf Libraries Jan 2004

University Of Central Florida Libraries, Annual Report 2003-2004, Ucf Libraries

Libraries' Documents

No abstract provided.

Go to article

Modified Sierpinski Fractal Antenna, Tripti Luintel Jan 2004

Modified Sierpinski Fractal Antenna, Tripti Luintel

Electronic Theses and Dissertations

Fractal antennas have the potential to provide multi-band solution through the property of self similarity that the fractal shape possess. This thesis deals with some modifications of the original Sierpinski fractal patch antenna, providing additional parameters to optimize in order to get the required radiation characteristics. A systematic study of the original Sierpinski monopole was done to gain an insight on the operation and multi-band behavior of the antenna and a similar study was done to find out why the patch version of Sierpinski lacks multi-band behavior. A Sierpinski antenna is designed by merging a grid and the fractal restoring …

Go to article

Nitrification Investigation And Modeling In The Chloraminated Drinking Water Distribution System, Suibing Liu Jan 2004

Nitrification Investigation And Modeling In The Chloraminated Drinking Water Distribution System, Suibing Liu

Electronic Theses and Dissertations

This dissertation consists of five papers concerning nitrification in chloraminated drinking water distribution systems in a one and a half year field study. Seven finished waters were produced from different treatment processes and distributed to eighteen pilot distribution systems (PDSs) that were made pipes taken from actual distribution systems. Unlined cast iron (UCI), galvanized steel (G), lined cast iron (LCI), and PVC pipes were used to build the PDSs. All finished waters were stabilized and chloraminated before entering the PDSs. This dissertation consists of five major parts. (1) System variations of nitrates, nitrites, DO, pH, alkalinity, temperature, chloramine residuals and …

Go to article

Part I: Evaluation Of Russian Synthetic Compounds As A Potential Source Of New Drug Leads Agains Breast And Colon Cancer Part Ii: Isolation Of Beta-Amyrin Formate From Eucalyptus Viminalis Labill And Investigation Of Its Colon Cancer Activity, Mihaela Cohanoschi Jan 2004

Part I: Evaluation Of Russian Synthetic Compounds As A Potential Source Of New Drug Leads Agains Breast And Colon Cancer Part Ii: Isolation Of Beta-Amyrin Formate From Eucalyptus Viminalis Labill And Investigation Of Its Colon Cancer Activity, Mihaela Cohanoschi

Electronic Theses and Dissertations

Although modern medicine made great steps toward curing most diseases considered deadliest, yet cancer remains one of the major public health problems. The first part of this thesis investigates a new source of selective compounds that are potential candidates against cancer. Fifteen Russian compounds were tested in order to establish their efficiency against two types of cancer: human breast SK-Br-3 and colorectal carcinoma HT-29. The bioassay results show that seven of the new synthetic Russian compounds can be considered new drug leads, based upon their low toxicity and efficacy in slowing the growth of human breast cancer and colon cancer …

Go to article

Modeling Of Membrane Solute Mass Transfer In Ro/Nf Membrane Systems, Yu Zhao Jan 2004

Modeling Of Membrane Solute Mass Transfer In Ro/Nf Membrane Systems, Yu Zhao

Electronic Theses and Dissertations

Five articles describing the impact of surface characteristics, and development of mass transfer models for diffusion controlled membrane applications are published in this dissertation. Article 1 (Chapter 3) describes the impact of membrane surface characteristics and NOM on membrane performance for varying pretreatment and membranes during a field study. Surface charge, hydrophobicity and roughness varied significantly among the four membranes used in the study. Membrane surface characteristics, NOM and SUVA measurements were used to describe mass transfer in a low pressure RO integrated membrane system. Inorganic and organic solute and water mass transfer coefficients were systematically investigated for dependence on …

Go to article

Biostability In Drinking Water Distribution Systems Study At Pilot-Scale, Michael Le Puil Jan 2004

Biostability In Drinking Water Distribution Systems Study At Pilot-Scale, Michael Le Puil

Electronic Theses and Dissertations

Biostability and related issues (e.g. nitrification) were investigated for 18 months in 18 pilot distribution systems, under various water quality scenarios. This study specifically investigated the impact of steady-state water changes on HPC levels in chlorinated and chloraminated distribution systems. Chlorination was more effective than chloramination in reducing HPC levels (1-2 log difference). There was a rapid increase in HPC corresponding to the change in steady-state water quality, which was observed in all PDS. Modeling effort demonstrated that HPC levels reached a maximum within five days after water quality change and return to initial level ten days after the change. …

Go to article

Characterization Of Protein Prenyltransferases And Protein Prenylation In Plasmodium Falciparum, Thiago Gaspar Dasilva Jan 2004

Characterization Of Protein Prenyltransferases And Protein Prenylation In Plasmodium Falciparum, Thiago Gaspar Dasilva

Electronic Theses and Dissertations

Malaria kills at least one million people each year, mostly children - a death every 30 seconds. Almost one half of the world population is at risk from malaria. Antimalarial drugs are the only means for the treatment of about 500 million annual global malaria cases. Because of prevalent drug-resistance it is extremely urgent to identify new drug targets. Many proteins involved in eukaryotic signal transduction and cell cycle progression undergo post-translational lipid modification by a prenyl group. Protein prenyltransferases, which catalyze the post-translational prenyl modification, have been established as a target for anticancer therapy. Research done in our laboratory …

Go to article

Self Designing Pattern Recognition System Employing Multistage Classification, Manal M. Abdelwahab Jan 2004

Self Designing Pattern Recognition System Employing Multistage Classification, Manal M. Abdelwahab

Electronic Theses and Dissertations

Recently, pattern recognition/classification has received a considerable attention in diverse engineering fields such as biomedical imaging, speaker identification, fingerprint recognition, etc. In most of these applications, it is desirable to maintain the classification accuracy in the presence of corrupted and/or incomplete data. The quality of a given classification technique is measured by the computational complexity, execution time of algorithms, and the number of patterns that can be classified correctly despite any distortion. Some classification techniques that are introduced in the literature are described in Chapter one. In this dissertation, a pattern recognition approach that can be designed to have evolutionary …

Go to article

Coed Adolescent Soccer Players In A Competitive Learning Milieu: An Ethnographic Assessment Of Gender Attitudes, Perceptions And Sport Specific Component Testing, Francis O'Donnell Jan 2004

Coed Adolescent Soccer Players In A Competitive Learning Milieu: An Ethnographic Assessment Of Gender Attitudes, Perceptions And Sport Specific Component Testing, Francis O'Donnell

Electronic Theses and Dissertations

The history of association soccer dates back to the 1800's, and all indications are that prospects for the female athlete was scarce in all sports. The researcher has arranged an environment where young females can train with males in a soccer setting that has all the necessary elements for the athletes to learn, improve and compete with their own gender as well as opposite gender. The female group has been noticeable underachievers in this sport and is not aware of their potential. The research methodology is ethnographic in nature and study could easily be related to a traditional way to …

Go to article

The C-Terminal Tail Of Presenilin Regulates Omi/Htra2 Protease Activity, Sanjeev Gupta, Rajesh Singh, Pinaki Datta, Zhi-Jia Zhang, Christopher Orr, Zhixian Lu, Garrey Dubois, Antonis S. Zervos, Miriam H. Meisler, Srinivasa M. Srinivasula, Teresa Fernandes-Alnemri, Emad S. Alnemri Jan 2004

The C-Terminal Tail Of Presenilin Regulates Omi/Htra2 Protease Activity, Sanjeev Gupta, Rajesh Singh, Pinaki Datta, Zhi-Jia Zhang, Christopher Orr, Zhixian Lu, Garrey Dubois, Antonis S. Zervos, Miriam H. Meisler, Srinivasa M. Srinivasula, Teresa Fernandes-Alnemri, Emad S. Alnemri

Faculty Bibliography 2000s

Presenilin mutations are responsible for most cases of autosomal dominant inherited forms of early onset Alzheimer disease. Presenilins play an important role in amyloid beta-precursor processing, NOTCH receptor signaling, and apoptosis. However, the molecular mechanisms by which presenilins regulate apoptosis are not fully understood. Here, we report that presenilin-1 (PS1) regulates the proteolytic activity of the serine protease Omi/HtrA2 through direct interaction with its regulatory PDZ domain. We show that a peptide corresponding to the cytoplasmic C-terminal tail of PS1 dramatically increases the proteolytic activity of Omi/HtrA2 toward the inhibitor of apoptosis proteins and beta-casein and induces cell death in …

Go to article

Resonant Enhancement Of Two-Photon Absorption In Substituted Fluorene Molecules, Joel M. Hales, David J. Hagan, Eric W. Van Stryland, K. J. Schafer, A. R. Morales, K. D. Belfield, P. Pacher, O. Kwon, J. L. Bredas Jan 2004

Resonant Enhancement Of Two-Photon Absorption In Substituted Fluorene Molecules, Joel M. Hales, David J. Hagan, Eric W. Van Stryland, K. J. Schafer, A. R. Morales, K. D. Belfield, P. Pacher, O. Kwon, J. L. Bredas

Faculty Bibliography 2000s

The degenerate and nondegenerate two-photon absorption (2PA) spectra for a symmetric and an asymmetric fluorene derivative were experimentally measured in order to determine the effect of intermediate state resonance enhancement (ISRE) on the 2PA cross section delta. The ability to tune the individual photon energies in the nondegenerate 2PA (ND-2PA) process afforded a quantitative study of the ISRE without modifying the chemical structure of the investigated chromophores. Both molecules exhibited resonant enhancement of the nonlinearity with the asymmetric compound showing as much as a twentyfold increase in delta. Furthermore, the possibility of achieving over a one order of magnitude enhancement …

Go to article

Broadband Optical Limiter Based On Nonlinear Photoinduced Anisotropy In Bacteriorhodopsin Film, Yuhua Huang, Georgios Siganakis, M. G. Moharam, Shin-Tson Wu Jan 2004

Broadband Optical Limiter Based On Nonlinear Photoinduced Anisotropy In Bacteriorhodopsin Film, Yuhua Huang, Georgios Siganakis, M. G. Moharam, Shin-Tson Wu

Faculty Bibliography 2000s

Nonlinear photoinduced anisotropy in a bacteriorhodopsin film was theoretically and experimentally investigated and a broadband active optical limiter was demonstrated in the visible spectral range. A diode-pumped second harmonic yttrium aluminum garnet laser was used as a pumping beam and three different wavelengths at lambda=442, 532, and 655 nm from different lasers were used as probing beams. The pump and probe beams overlap at the sample. When the pumping beam is absent, the probing beam cannot transmit the crossed polarizers. With the presence of the pumping beam, a portion of the probing light is detected owing to the photoinduced anisotropy. …

Go to article

Photonic Switching Based On The Photoinduced Birefringence In Bacteriorhodopsin Films, Yuhua Huang, Shin-Tson Wu, Youyuan Zhao Jan 2004

Photonic Switching Based On The Photoinduced Birefringence In Bacteriorhodopsin Films, Yuhua Huang, Shin-Tson Wu, Youyuan Zhao

Faculty Bibliography 2000s

Photoinduced birefringence in bacteriorhodopsin films was investigated using pump-probe method and its application for photonic switching explored. A diode-pumped second-harmonic YAG laser was used as a pumping beam and a diode laser at lambda=660 nm was used as a probing beam. The pump and probe beams overlap at the sample. Without the pumping beam, the probing light cannot transmit the analyzer to the detector. However, due to the photoinduced anisotropy, a portion of the probing light is detected when the pumping beam is present. Since lambda=660 nm is far from the absorption peak (similar to570 nm) of the ground state, …

Go to article

Modeling And Simulation With Augmented Reality, Khaled Hussain, Varol Kaptan Jan 2004

Modeling And Simulation With Augmented Reality, Khaled Hussain, Varol Kaptan

Faculty Bibliography 2000s

In applications such as airport operations, military simulations, and medical simulations, conducting simulations in accurate and realistic settings that are represented by real video imaging sequences becomes essential. This paper surveys recent work that enables visually realistic model constructions and the simulation of synthetic objects which are inserted in video sequences, and illustrates how synthetic objects can conduct intelligent behavior within a visual augmented reality.

Go to article

Dna-Protein Kinase Catalytic Subunit-Interacting Protein Kip Binds Telomerase By Interacting With Human Telomerase Reverse Transcriptase, Gun Eui Lee, Eun Young Yu, Chae Hyun Cho, Junho Lee, Mark T. Muller, In Kwon Chung Jan 2004

Dna-Protein Kinase Catalytic Subunit-Interacting Protein Kip Binds Telomerase By Interacting With Human Telomerase Reverse Transcriptase, Gun Eui Lee, Eun Young Yu, Chae Hyun Cho, Junho Lee, Mark T. Muller, In Kwon Chung

Faculty Bibliography 2000s

Telomere homeostasis, a process that is essential for continued cell proliferation and genomic stability, is regulated by endogenous telomerase and a collection of associated proteins. In this paper, a protein called KIP ( previously reported as a protein that binds specifically to DNA-dependent protein kinase), has been identified as a telomerase-regulating activity based on the following pieces of evidence. First, complexes between KIP and the catalytic subunit of telomerase ( hTERT) were identified using the yeast two-hybrid technique. Second, antibodies specific to KIP immunoprecipitate human telomerase in cell-free extracts. Third, immunolocalization experiments demonstrate that KIP is a nuclear protein that …

Go to article

First Prev Next Last