(22,301 - 22,320 of 25,637)
Pages
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Title
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Transport and dispersion of fire extinguishing agents downstream from clutter elements of aircraft engine nacelles.
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Creator
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Zbeeb, Khaled., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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The combination of highly turbulent airflow, flammable fluids, and numerous ignition sources makes aircraft engine nacelles a difficult fire zone to protect. Better understanding of nacelle air flow and how it influences the spread of fires and fire extinguishing agents is needed to improve the efficiency of fire suppression. The first objective was to establish a CFD model for a flow field test section to analyze the transport and dispersion of fire extinguishing agents in the presence of...
Show moreThe combination of highly turbulent airflow, flammable fluids, and numerous ignition sources makes aircraft engine nacelles a difficult fire zone to protect. Better understanding of nacelle air flow and how it influences the spread of fires and fire extinguishing agents is needed to improve the efficiency of fire suppression. The first objective was to establish a CFD model for a flow field test section to analyze the transport and dispersion of fire extinguishing agents in the presence of various clutter elements. To validate the use of the CFD model, the simulation results of the CFD model were compared to the experimental data and they show an agreement with the experimental data. The second objective was to present parametric studies to show the effects of the coflow speed, turbulence intensity and agent droplet size on the transport and dispersion of the agent particles downstream from the clutter elements.
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Date Issued
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2009
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PURL
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http://purl.flvc.org/FAU/186687
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Subject Headings
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Airplanes, Nacelles, Safety measures, Airplanes, Fires and fire prevention, Fire extinguishing agents, Testing, Airplanes, Fluid dynamics, Mathematical models
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Format
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Document (PDF)
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Title
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TRANSPORT AND PHOTOELECTRICAL PROPERTIES OF GALLIUM-ARSENIDE CONTAINING DEEP ACCEPTORS.
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Creator
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BROWN, WINFIELD JAMES, JR., Florida Atlantic University, Blakemore, John S.
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Abstract/Description
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Analysis of Hall effect and optical measurements shows that nickel, cobalt, and manganese form deep compact acceptors in Gallium Arsenide, with activation energies of 0.20 eV, 0.16 eV, and 0.09 eV respectively. In all three systems the carrier transport is due to free holes in the valence band. The hole mobility appears to be limited by non-polar scattering at high temperatures and by ionized impurity scattering at lower temperatures. At low temperatures impurity band conduction was apparent...
Show moreAnalysis of Hall effect and optical measurements shows that nickel, cobalt, and manganese form deep compact acceptors in Gallium Arsenide, with activation energies of 0.20 eV, 0.16 eV, and 0.09 eV respectively. In all three systems the carrier transport is due to free holes in the valence band. The hole mobility appears to be limited by non-polar scattering at high temperatures and by ionized impurity scattering at lower temperatures. At low temperatures impurity band conduction was apparent in crystals with heavy doping. The photo-absorption crosssection for manganese (which we find is lower than previously reported) and cobalt can be viewed as the sum of a Lucovsky-like delta-function potential model for photo-ionization, and smaller but recognizable contributions due to transitions of holes into the valence "split-off" band. We have observed the spectral dependence of photoconductivity in these three doped GaAs systems from the extrinsic threshold through the intrinsic peak.
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Date Issued
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1971
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PURL
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http://purl.flvc.org/fcla/dt/13430
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Subject Headings
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Gallium, Photoelectricity
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Format
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Document (PDF)
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Title
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TRANSPORT MEASUREMENTS ON SEMICONDUCTING TCNQ SALTS.
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Creator
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LANE, JOHN EUGENE, Florida Atlantic University, Blakemore, John S., Charles E. Schmidt College of Science, Department of Physics
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Abstract/Description
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This work consists mainly of two parts. First was the development of the necessary experimental techniques for measuring single crystal conductivity of anisotropic charge transfer salts. Difficulties included high impedance problems and limited size of available crystals. Cs2(TCNQ)3 was used as a test material with which to develop these techniques. An extensive investigation was undertaken to study the possibility of intrinsic and extrinsic behavior in this material. The second phase of this...
Show moreThis work consists mainly of two parts. First was the development of the necessary experimental techniques for measuring single crystal conductivity of anisotropic charge transfer salts. Difficulties included high impedance problems and limited size of available crystals. Cs2(TCNQ)3 was used as a test material with which to develop these techniques. An extensive investigation was undertaken to study the possibility of intrinsic and extrinsic behavior in this material. The second phase of this work was the study of TCNQ charge transfer salts in which the donors were structurally related pyridinium ion radicals. Four types of donors were synthesized using a methyl or benzyl substituent along with a cyano group in the 3 or 4 position of the ring. A total of eight compounds were studied including salts of the 1:1 and 1:2 stochiometry. Compaction conductivity was measured for all eight materials along with single crystal conductivity of three of the salts.
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Date Issued
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1977
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PURL
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http://purl.flvc.org/fcla/dt/13835
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Subject Headings
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Charge transfer, One-dimensional conductors, Organic semiconductors, Salts--Electric properties
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Format
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Document (PDF)
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Title
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Transport of seawater and its influence on the transverse tensile strength of unidirectional composite materials.
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Creator
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Fichera, Maryann, Carlsson, Leif A., Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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The objective of this research was to characterize the seawater transport and its effect on the transverse tensile strength of a carbon/vinylester composite. The moisture contents of neat vinylester and unidirectional carbon/vinylester composite panels immersed in seawater were monitored until saturation. A model for moisture up-take was developed based on superposition of Fickian diffusion, and Darcy’s law for capillary transport of water. Both the predicted and measured saturation times...
Show moreThe objective of this research was to characterize the seawater transport and its effect on the transverse tensile strength of a carbon/vinylester composite. The moisture contents of neat vinylester and unidirectional carbon/vinylester composite panels immersed in seawater were monitored until saturation. A model for moisture up-take was developed based on superposition of Fickian diffusion, and Darcy’s law for capillary transport of water. Both the predicted and measured saturation times increased with increasing panel size, however the diffusion model predicts much longer times while the capillary model predicts shorter time than observed experimentally. It was also found that the saturation moisture content decreased with increasing panel size. Testing of macroscopic and miniature composite transverse tensile specimens, and SEM failure inspection revealed more fiber/matrix debonding in the seawater saturated composite than the dry composite, consistent with a slightly reduced transverse tensile strength.
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Date Issued
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2015
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PURL
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http://purl.flvc.org/fau/fd/FA00004368, http://purl.flvc.org/fau/fd/FA00004368
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Subject Headings
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Composite materials -- Deterioration, Composite materials -- Effect of environment on, Engineering design, Marine engineering, Polymers -- Permeability, Polymetric composites -- Deterioration
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Format
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Document (PDF)
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Title
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Transport of warm, high-salinity water to fringing reefs in the Exuma Cays, Bahamas: implications for coral bleaching.
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Creator
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Pitts, Patrick A., Harbor Branch Oceanographic Institute
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Date Issued
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1999
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PURL
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http://purl.flvc.org/fau/fd/FA00007051
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Subject Headings
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Exuma (Bahamas), Salinity, Coral bleaching, Water temperature, Reefs--Bahamas
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Format
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Document (PDF)
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Title
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Transport over a narrow shelf: Exuma Cays, Bahamas.
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Creator
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Smith, Ned P.
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Date Issued
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2004
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PURL
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http://purl.flvc.org/FCLA/DT/2795920
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Subject Headings
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Exuma Islands, Bahamas --Maps, Continental shelf, Continental shelf --Caribbean Area, Marine ecology, Ocean temperature --Caribbean Sea --Charts, diagrams, etc.
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Format
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Document (PDF)
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Title
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Transport processes linking shelf and back reef ecosystems in the Exuma Cays, Bahamas.
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Creator
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Smith, Ned P.
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Date Issued
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2004
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PURL
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http://purl.flvc.org/FCLA/DT/3171655
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Subject Headings
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Coral reef ecology --Research, Tides, Ocean currents, Winds, Hydrodynamics --Mathematical models
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Format
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Document (PDF)
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Title
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Transport through Tavernier Creek: a primary flushing pathway for Northeast Florida Bay.
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Creator
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Smith, Ned P.
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Date Issued
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2005
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PURL
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http://purl.flvc.org/FCLA/DT/2796048
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Subject Headings
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Florida Bay (Fla.), Tavernier (Fla.) --Maps, Tides, Tidal currents, Salinity --Florida
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Format
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Document (PDF)
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Title
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Transportation and development in Central Florida: The rise of Orlando in the transport hierarchy.
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Creator
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Ivy, Russell L., Falasz, M., Palimino, P.
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Abstract/Description
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Transportation plays a crucial role in the location and development of economic activity. Early transportation network development models discussed by Taaffe, Gauthier and O'Kelly (1996) as well as Lowe and Moryadas (1975) help to illustrate the important relationship between the two. These bodies of work clearly show that the most accessible places in a region are associated with a relatively higher level of economic buildup than those places disadvantaged by either the imposed transport...
Show moreTransportation plays a crucial role in the location and development of economic activity. Early transportation network development models discussed by Taaffe, Gauthier and O'Kelly (1996) as well as Lowe and Moryadas (1975) help to illustrate the important relationship between the two. These bodies of work clearly show that the most accessible places in a region are associated with a relatively higher level of economic buildup than those places disadvantaged by either the imposed transport network (such as being bypassed by the U.S Interstate highway system), or the lack of transport infrastructure altogether. This relationship between transportation and economic development is often considered to be a chicken-and-egg problem. In other words, does the creation of transportation arteries become an important stimulus for the attraction of economic activity, or does the presence of a potentially exploitable economic resource or comparative advantage (such as mining, agriculture, or even tourism) generate demand for the buildup of a transportation network?
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Date Issued
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1997
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PURL
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http://purl.flvc.org/fcla/dt/3327245
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Format
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Document (PDF)
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Title
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Transportation engineering assimilated livability planning using micro-simulation models for Southeast Florida.
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Creator
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O’Berry, Athur Dylan, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
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Abstract/Description
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Transportation engineering has taken upon a new role; to empower the alternative modes of travel: walking, biking, and bus transit. In this new era, engineers are rethinking a network designed predominately for the automobile. The ultimate goal of this research is to create a process that can make a vehicle dominant corridor a desirable, livable thoroughfare by livability design and context sensitive performance measures. Balancing travel modes requires an account of vehicular traffic and the...
Show moreTransportation engineering has taken upon a new role; to empower the alternative modes of travel: walking, biking, and bus transit. In this new era, engineers are rethinking a network designed predominately for the automobile. The ultimate goal of this research is to create a process that can make a vehicle dominant corridor a desirable, livable thoroughfare by livability design and context sensitive performance measures. Balancing travel modes requires an account of vehicular traffic and the impact of reconfiguring existing conditions. The analysis herein is conducted by field data collection, transportation equations and microsimulation. Simulating traffic behavior will be the means to apply livable alternatives comparable to existing Southeast Florida conditions. The results herein have shown that micro-simulation can be utilized in transportation planning to reveal good livability alternatives.
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Date Issued
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2015
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PURL
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http://purl.flvc.org/fau/fd/FA00004455
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Subject Headings
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Electronics in transportation, Traffic estimation -- Mathematical models, Transportation -- Planning -- Data processing, Transportation demand management, Transportation engineering
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Format
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Document (PDF)
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Title
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Transportation operation and safety comparison between unsignalized/signalized offset t-intersections, two-lane roundabout, and modified roundabout.
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Creator
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Fleming, Brandon, Kaisar, Evangelos I., Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
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Abstract/Description
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Traditional intersections have always caused congestion, delay, and accidents. There are numerous geometric intersection designs that best fit each situation. This study performed an operational and safety comparison with unsignalized/signalized offset, Tintersections, a two-lane roundabout, and a modified roundabout to decrease the overall travel delay and increase the safety using a case study. Using data from a government source, all designs were tested in a calibrated micro simulation...
Show moreTraditional intersections have always caused congestion, delay, and accidents. There are numerous geometric intersection designs that best fit each situation. This study performed an operational and safety comparison with unsignalized/signalized offset, Tintersections, a two-lane roundabout, and a modified roundabout to decrease the overall travel delay and increase the safety using a case study. Using data from a government source, all designs were tested in a calibrated micro simulation model and traffic signals were optimized using a signal optimization platform. Each design was tested with various balancing schemes, left turn percentages, and hourly volumes to determine the failure point. The unsignalized/signalized offset T-intersections, two-lane roundabout, and modified roundabout were compared by throughputs, travel delay, and travel time. After analysis, it was determined that the modified roundabout performed the best out of any design. All approaches had minimum travel delay while reducing the number of conflict points considerably with the modified roundabout.
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Date Issued
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2014
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PURL
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http://purl.flvc.org/fau/fd/FA00004110, http://purl.flvc.org/fau/fd/FA00004110
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Subject Headings
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Roads -- Interchanges and intersections -- Safety measures, Traffic circles -- Safety measures, Traffic safety, Traffic signs and signals -- Design
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Format
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Document (PDF)
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Title
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TRANSPOSITION: A FURTHER TEST OF ABSOLUTE VERSUS RELATIONAL PREDICTIONS.
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Creator
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BIZAILLON, PAUL DUNN., Florida Atlantic University, Adamson, Robert E.
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Abstract/Description
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An attempt was made to investigate the intradimensional transfer of a simultaneously presented, double brightness discrimination in male hooded rats. It was hypothesized that in a paradigm designed to emphasize interstimulus cues over individual stimulus cues, subjects would exhibit transposition in testing, even when this involved approaching a previously negative stimulus, and avoiding a previously positive stimulus, under extinction conditions. Results of two tests (with a partial...
Show moreAn attempt was made to investigate the intradimensional transfer of a simultaneously presented, double brightness discrimination in male hooded rats. It was hypothesized that in a paradigm designed to emphasize interstimulus cues over individual stimulus cues, subjects would exhibit transposition in testing, even when this involved approaching a previously negative stimulus, and avoiding a previously positive stimulus, under extinction conditions. Results of two tests (with a partial reinforcement retraining session between them) indicated significant transposition on all measures except trial of first choice on Test I for the group trained to approach the brighter stimulus in any pair presented. Results were interpreted as being in support of relational theory which stresses the importance of dimensional salience in the establishment of relational responding.
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Date Issued
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1975
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PURL
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http://purl.flvc.org/fcla/dt/13749
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Subject Headings
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Brightness perception, Discrimination learning
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Format
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Document (PDF)
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Title
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A transputer-based fault-tolerant robot controller.
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Creator
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Kulkarni, Shubhada R., Florida Atlantic University, Fernandez, Eduardo B., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
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Abstract/Description
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In recent years robots have become increasingly important in many areas. A robotic controller requires high speed and high reliability and its design must continue these two aspects. This thesis presents a design for a Transputer based fault tolerant robot controller. For concreteness, we have designed this controller for a specific robot, the SEDAB, a prototype developed by IBM Corp. This design attempts to satisfy the two requirements of speed and reliability. Speed is achieved by the use...
Show moreIn recent years robots have become increasingly important in many areas. A robotic controller requires high speed and high reliability and its design must continue these two aspects. This thesis presents a design for a Transputer based fault tolerant robot controller. For concreteness, we have designed this controller for a specific robot, the SEDAB, a prototype developed by IBM Corp. This design attempts to satisfy the two requirements of speed and reliability. Speed is achieved by the use of a concurrent structure composed of Transputers. Reliability is provided by a self-testing mechanism and a multiprocessor system architecture. The Occam implementation of the robot processes is described. We have evaluated the reliability of this controller. The reliability study shows that there is a significant increase in the reliability of this controller due to the new architecture and proposed fault detection mechanism. While we have not been able to actually control this robot, we have shown that some scheduling heuristics can be effectively used to provide a higher level of performance.
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Date Issued
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1990
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PURL
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http://purl.flvc.org/fcla/dt/14616
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Subject Headings
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Robots--Control systems, Automatic control--Computer programs
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Format
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Document (PDF)
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Title
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Transsynaptic Coordination of Synaptic Growth, Function, and Stability by the L1-Type CAM Neuroglian.
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Creator
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Enneking, Eva-Maria, Kudumala, Sirisha R., Moreno, Eliza, Stephan, Raiko, Boerner, Jana, Godenschwege, Tanja A., Pielage, Jan, Bellen, Hugo J.
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Date Issued
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2013-04-16
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PURL
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http://purl.flvc.org/fau/fd/FAUIR000106
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Format
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Citation
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Title
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Trauma and Telling: Examining the Intergenerational Transmission of Trauma Through Silence.
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Creator
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Murray, Jennifer, Hagood, Taylor, Florida Atlantic University, Dorothy F. Schmidt College of Arts and Letters, Department of English
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Abstract/Description
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In recent decades there has been a great deal of scholarly and scientific work examining both the impact and the transmission of trauma. The focus of this thesis is the transmission of the trauma of genocide and large-scale historical traumas, specifically that seen in the Holocaust and the missionization of the California Indians in the 18th century. Through the analysis of the autobiographical narratives composed by three generations of Holocaust survivors, as well as one composed by a...
Show moreIn recent decades there has been a great deal of scholarly and scientific work examining both the impact and the transmission of trauma. The focus of this thesis is the transmission of the trauma of genocide and large-scale historical traumas, specifically that seen in the Holocaust and the missionization of the California Indians in the 18th century. Through the analysis of the autobiographical narratives composed by three generations of Holocaust survivors, as well as one composed by a later generation descendant of the California Mission Indians, I argue that silence is not only a manifestation of trauma but also a tool of its transmission. I further argue that when this silence is broken and the stories are told we begin to see a shift in the traumatic memory away from re-traumatizing the later generations and toward preserving an accurate historical memory without the significant psychological cost to the later generations.
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Date Issued
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2016
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PURL
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http://purl.flvc.org/fau/fd/FA00004616
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Subject Headings
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California -- History -- To 1846., Holocaust, Jewish (1939-1945) -- Psychological aspects., Holocaust, Jewish (1939-1945) -- Personal narratives., Indians, Treatment of -- California -- History.
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Format
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Document (PDF)
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Title
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TRAUMATIC BRAIN INJURIES IN HIGH IMPACT SPORTS.
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Creator
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Verma, Rahat, Maldonado, Monica, Florida Atlantic University, Harriet L. Wilkes Honors College
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Abstract/Description
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The prevalence of concussions and other traumatic head injuries have been proven to be significantly higher in American Football compared to sports with similar levels of physicality such as Rugby. A meta-analysis will be performed comparing the two sports to determine possible indicators or reasons of concussions in American Football. Three key differences that will be evaluated are the safety measures and rules of the games, the level of equipment, and the amount and types of preparation or...
Show moreThe prevalence of concussions and other traumatic head injuries have been proven to be significantly higher in American Football compared to sports with similar levels of physicality such as Rugby. A meta-analysis will be performed comparing the two sports to determine possible indicators or reasons of concussions in American Football. Three key differences that will be evaluated are the safety measures and rules of the games, the level of equipment, and the amount and types of preparation or training involved. Lastly, the long-term effects of traumatic head injuries in our current society will be investigated.
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Date Issued
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2019
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PURL
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http://purl.flvc.org/fau/fd/FAUHT00094
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Format
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Document (PDF)
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Title
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Travel-time Based Signal Performance Measures (TTSPM).
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Creator
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Petrovska, Natasha, Stevanovic, Aleksandar, Graduate College
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Abstract/Description
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Vehicle travel time on arterial roads with signalized intersections is an essential parameter for traffic management. There is an increasing interest in signal performance measurement for signalized intersections in the United States. Reducing the journey times and increasing the capacity are some of the fundamental aims with potential benefits in environmental pollution, and energy utilization. The Travel-time Based Signal Performance Measures application is a tool for estimating signal...
Show moreVehicle travel time on arterial roads with signalized intersections is an essential parameter for traffic management. There is an increasing interest in signal performance measurement for signalized intersections in the United States. Reducing the journey times and increasing the capacity are some of the fundamental aims with potential benefits in environmental pollution, and energy utilization. The Travel-time Based Signal Performance Measures application is a tool for estimating signal performance measures based on upstream-link travel times. The application utilizes well known concept of Volume- Delay Functions to convert measured travel times into signal performance measures. Based on this functionality, it can estimate the performance measures for 7 signalized intersections on Glades Road, Boca Raton, Florida. Available performance measures for the major through movements are: volumeto- capacity ratio, Level of Service LOS, and the number of cycles to wait. The derived measures can be graphically visualized on Google Maps. The travel time data acquisition is performed using BlueTOAD devices. The goal is to introduce automated assessment tool, visualization and evaluation of the intersections’ performance measures simultaneously at multiple intersections. The main objective of this web application is to help traffic operators/engineers to evaluate performance of the signalized corridors exploiting the archived measured travel times.
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Date Issued
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2015
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PURL
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http://purl.flvc.org/fau/fd/FA00005907
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Format
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Document (PDF)
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Title
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Traveling Waves of Dominance in Motion-Induced Blindness.
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Creator
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Cox, Dustin, Hong, Sang Wook, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
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Abstract/Description
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In the present study, it was examined whether the spatiotemporal dynamics of transitions towards target dominance in motion-induced blindness (MIB) were wave-like, similar to those in binocular rivalry. The spatiotemporal dynamics of transitions towards dominance in MIB were further compared with those in binocular rivalry to reveal a potential neural locus of MIB. Across a series of experiments, the relationship between target length, stimulus structure, presentation location and the latency...
Show moreIn the present study, it was examined whether the spatiotemporal dynamics of transitions towards target dominance in motion-induced blindness (MIB) were wave-like, similar to those in binocular rivalry. The spatiotemporal dynamics of transitions towards dominance in MIB were further compared with those in binocular rivalry to reveal a potential neural locus of MIB. Across a series of experiments, the relationship between target length, stimulus structure, presentation location and the latency for circular arc segment-shaped targets to reappear was examined, respectively. It was found that target reappearance durations increase with target length, as if they reappear in a gradual, wavelike fashion. Target reappearance durations were decreased for collinear compared to radial targets, but they were not influenced by the location of target presentation. The results suggest MIB target reappearances are associated with traveling waves of dominance, and early visual cortex is a likely neural substrate in which these wave-like transitions occur.
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Date Issued
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2016
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PURL
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http://purl.flvc.org/fau/fd/FA00004704, http://purl.flvc.org/fau/fd/FA00004704
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Subject Headings
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Binocular rivalry, Binocular vision, Visual pathways, Visual perception
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Format
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Document (PDF)
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Title
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Treasure Coast Campus.
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Creator
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Florida Atlantic University
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Abstract/Description
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Front entrance to the Treasure Coast Campus in Port St. Lucie, Florida
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Date Issued
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1995
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PURL
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http://purl.flvc.org/fau/fd/FA00010201
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Subject Headings
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Florida Atlantic University -- History, Florida Atlantic University -- Students
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Format
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Image (JPEG2000)
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Title
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Treasure Coast Campus Library Annual Report 2010-2011.
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Creator
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Alderman, Pam
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Date Issued
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2011
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PURL
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http://purl.flvc.org/fau/TCC_AR2010-2011
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Subject Headings
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Florida Atlantic University. Libraries
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Format
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Document (PDF)
Pages