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STEADY STATE TRANSPORT WITH ISOENERGETIC AND NEUTRINO-ELECTRON SCATTERING
Title
STEADY STATE TRANSPORT WITH ISOENERGETIC AND NEUTRINO-ELECTRON SCATTERING.
Creator
BALLESTER, JORGE LUIS., Florida Atlantic University, Bruenn, Stephen W.
Abstract/Description
Steady state solutions to the Boltzmann transport equation were obtained for the transport of neutrinos across a finite, plane parallel slab using discrete ordinate methods. Semi-analytic solutions were obtained in the case of isoenergetic, isotropic scattering for one energy group and in the restricted case of isoenergetic and nonisoenergetic (Compton), isotropic scattering between two energy groups where the isoenergetic and the Compton scattering rates are the same for the two groups. For...
Show moreSteady state solutions to the Boltzmann transport equation were obtained for the transport of neutrinos across a finite, plane parallel slab using discrete ordinate methods. Semi-analytic solutions were obtained in the case of isoenergetic, isotropic scattering for one energy group and in the restricted case of isoenergetic and nonisoenergetic (Compton), isotropic scattering between two energy groups where the isoenergetic and the Compton scattering rates are the same for the two groups. For these two cases solutions were obtained for total optical thicknesses of 0.2, 2, and 20. When the Compton scattering rates of the two energy groups are allowed to be different, the transport equation becomes nonlinear due to the exclusion principle. For this case a numerical scheme was developed which yielded solutions for slabs having optical thicknesses up to unity.
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Date Issued
1980
PURL
http://purl.flvc.org/fcla/dt/14014
Subject Headings
Electron transport, Neutron transport theory
Format
Document (PDF)
Automatic parking lot occupancy computation using motion tracking
Title
Automatic parking lot occupancy computation using motion tracking.
Creator
Justo Torres, Francisco Alberto, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Nowadays it is very hard to find available spots in public parking lots and even harder at facilities such as universities and sports venues. A system that provides drivers with parking availability and parking lot occupancy will allow users find a parking space much easier and faster. This thesis presents a system for automatic parking lot occupancy computation using motion tracking. The use of computer vision techniques and low cost video sensors makes it possible to have an accurate system...
Show moreNowadays it is very hard to find available spots in public parking lots and even harder at facilities such as universities and sports venues. A system that provides drivers with parking availability and parking lot occupancy will allow users find a parking space much easier and faster. This thesis presents a system for automatic parking lot occupancy computation using motion tracking. The use of computer vision techniques and low cost video sensors makes it possible to have an accurate system that allows drivers to find a parking spot. Video bitrate and quality reduction and its impact on performance were studied. It was concluded that high quality video is not necessary for the proposed algorithm to obtain accurate results. The results show that relatively inexpensive and low bandwidth networks can be used to develop large scale parking occupancy applications.
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Date Issued
2013
PURL
http://purl.flvc.org/fcla/dt/3362483
Subject Headings
Traffic estimation, Automobile parking, Transportation engineering, Transportation demand management, Electronics in transportation, Computer vision
Format
Document (PDF)
Transportation engineering assimilated livability planning using micro-simulation models for Southeast Florida
Title
Transportation engineering assimilated livability planning using micro-simulation models for Southeast Florida.
Creator
O’Berry, Athur Dylan, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
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
2015
PURL
http://purl.flvc.org/fau/fd/FA00004455
Subject Headings
Electronics in transportation, Traffic estimation -- Mathematical models, Transportation -- Planning -- Data processing, Transportation demand management, Transportation engineering
Format
Document (PDF)
An empirical methodology for foundry specific submicroncmos analog circuit design
Title
An empirical methodology for foundry specific submicroncmos analog circuit design.
Creator
Rivas-Torres, Wilfredo, Roth, Zvi S., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Analog CMOS amplifiers are the building blocks for many analog circuit applications such as Operational Amplifiers, Comparators, Analog to Digital converters and others. This dissertation presents empirical design methodologies that are both intuitive and easy to follow on how to design these basic building blocks. The design method involves two main phases. In the first phase NMOS and PMOS transistor design kits, provided by a semiconductor foundry, are fully characterized using a set of...
Show moreAnalog CMOS amplifiers are the building blocks for many analog circuit applications such as Operational Amplifiers, Comparators, Analog to Digital converters and others. This dissertation presents empirical design methodologies that are both intuitive and easy to follow on how to design these basic building blocks. The design method involves two main phases. In the first phase NMOS and PMOS transistor design kits, provided by a semiconductor foundry, are fully characterized using a set of simulation experiments. In the second phase the user is capable of modifying all the relevant circuit design parameters while directly observing the tradeoffs in the circuit performance specifications. The final design is a circuit that very closely meets a set of desired design specifications for the design parameters selected. That second phase of the proposed design methodology utilizes a graphical user interface in which the designer moves a series of sliders allowing assessment of various design tradeoffs. The theoretical basis for this design methodology involves the transconductance efficiency and inversion coefficient parameters. In this dissertation there are no restrictive assumptions about the MOS transistor models. The design methodology can be used with any submicron model supported by the foundry process and in this sense the methods included within are general and non-dependent on any specific MOSFET model (e.g. EKV or BSIM3). As part of the design tradeoffs assessment process variations are included during the design process rather than as part of some post-nominal-design analysis. One of the central design parameters of each transistor in the circuit is the MOSFET inversion coefficient. The calculation of the inversion coefficient necessitates the determination of an important process parameter known as the Technology Current. In this dissertation a new method to determine the technology current is developed. Y Parameters are used to characterize the CMOS process and this also helps in improving the technology current determination method. A study of the properties of the technology current proves that indeed a single long channel saturated MOS transistor can be used to determine a fixed technology current value that is used in subsequent submicron CMOS design. Process corners and the variability of the technology current are also studied and the universality of the transconductance efficiency versus inversion coefficient response is shown to be true even in the presence of process variability.
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Date Issued
2013
PURL
http://purl.flvc.org/fau/fd/FA0004050
Subject Headings
Electron transport, Integrated circuits -- Design and construction, Metal oxide semiconductors, Complementary -- Mathematical models
Format
Document (PDF)
Development of a Mobile Mapping System for Road Corridor Mapping
Title
Development of a Mobile Mapping System for Road Corridor Mapping.
Creator
Sairam, Nivedita, Nagarajan, Sudhagar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
In any infrastructure project, managing the built assets is an important task. In the case of transportation asset inventories, a significant cost and effort is spent on recording and storing the asset information. In order to reduce the time and cost involved in road corridor mapping, this paper proposes a low cost MMS (Mobile Mapping System) using an equipped laser scanner and cameras. The process of building the MMS, components and sensors involved and calibration procedures are discussed....
Show moreIn any infrastructure project, managing the built assets is an important task. In the case of transportation asset inventories, a significant cost and effort is spent on recording and storing the asset information. In order to reduce the time and cost involved in road corridor mapping, this paper proposes a low cost MMS (Mobile Mapping System) using an equipped laser scanner and cameras. The process of building the MMS, components and sensors involved and calibration procedures are discussed. The efficiency of this Mobile Mapping System is experimented by mounting it on a truck and golf cart. The paper also provides a framework to extract road assets both automatically and manually using stateof- the-art techniques. The efficiency of this method is compared with traditional field survey methods. Quality of collected data, data integrity and process flow are experimented with a sample asset management framework and a spatial database structure for mapping road corridor features.
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Date Issued
2016
PURL
http://purl.flvc.org/fau/fd/FA00004629, http://purl.flvc.org/fau/fd/FA00004629
Subject Headings
Transportation engineering., Electronics in engineering., Geographic information systems--Software., Internetworking (Telecommuniation), Geospatial data.
Format
Document (PDF)
Transit signal priority for emergency evacuation
Title
Transit signal priority for emergency evacuation: mitigating disaster.
Creator
Parr, Scott A., College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
The goal of this research is to answer a single question. During an urban evacuation, is it advisable for regional planners to allow transit units signal priority in cases where police assisted traffic controls are not an option? Standard practice for emergency evacuation is to place police officers at intersection throughout the evacuation area. However, this is not always an option where environmental factors such as the presence of fire, chemical plume, radioactive fallout (nuclear...
Show moreThe goal of this research is to answer a single question. During an urban evacuation, is it advisable for regional planners to allow transit units signal priority in cases where police assisted traffic controls are not an option? Standard practice for emergency evacuation is to place police officers at intersection throughout the evacuation area. However, this is not always an option where environmental factors such as the presence of fire, chemical plume, radioactive fallout (nuclear contaminated wind and dust) do not permit police presence. Results from a case study conducted on Washington D.C. show that it would take four non-prioritized transit units to accomplish the same task as three prioritized vehicles. Furthermore, allowing transit signal priority during an urban evacuation has little to no effect on evacuation clearance time or evacuee travel time. Moreover, when transit signal priority is restricted to operate only on evacuation routes, evacuee travel and delay time decreases.
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Date Issued
2010
PURL
http://purl.flvc.org/FAU/1930488
Subject Headings
Emergency transportation, Government policy, Emergency management, Evacuation of civilians, Electronic traffic controls
Format
Document (PDF)
Assessment of optimality of arterial signal timing plans under diurnal and day-to-day variations in traffic demand
Title
Assessment of optimality of arterial signal timing plans under diurnal and day-to-day variations in traffic demand.
Creator
Ostojic, Marija, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
Most U.S. urban traffic signal systems deploy multiple signal timing plans to account for daily variability of traffic demand (i.e. morning peak, midday, afternoon peak, off peak and night). Groups of signals (belonging to the one zone or section) along an urban arterial, usually operate in a coordinated manner. This essentially means that timing plans change at the same time for all the signals in the group, so as to facilitate vehicle progression of through a series of signals. Good traffic...
Show moreMost U.S. urban traffic signal systems deploy multiple signal timing plans to account for daily variability of traffic demand (i.e. morning peak, midday, afternoon peak, off peak and night). Groups of signals (belonging to the one zone or section) along an urban arterial, usually operate in a coordinated manner. This essentially means that timing plans change at the same time for all the signals in the group, so as to facilitate vehicle progression of through a series of signals. Good traffic signal timing practices assume a certain level of monitoring and maintenance in order to guarantee that they are efficient in servicing current traffic conditions.
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Date Issued
2015
PURL
http://purl.flvc.org/fau/fd/FA00004457, http://purl.flvc.org/fau/fd/FA00004457
Subject Headings
Electronic traffic controls -- Evaluation, Roads -- Safety measures -- Evaluation, Signalized intersections, Traffic flow management, Traffic signs and signals -- Control systems -- Methodology, Transportation engineering -- Technological innovations
Format
Document (PDF)