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2007

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Stochastic Models For Enhancing Agility Of Supply Chains, Alok K. Verma Jan 2007

Stochastic Models For Enhancing Agility Of Supply Chains, Alok K. Verma

Engineering Technology Faculty Publications

This paper deals with the application of stochastic inventory model to the three-tier supply chain and verifying the values obtained by mathematical model with discrete event simulation. We investigate three-stage serial supply chain with stochastic demand and fixed replenishment lead-time. Inventory holding costs are charged at each stage, and each stage may incur a consumer backorder penalty cost charged by primary supplier to secondary supplier. The customer-demand follows Poisson distribution. We implement Base Stock model for inventory control at both suppliers. Computer simulation is then designed in such a way that it satisfied all the assumptions for mathematical model. Simulation …

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Landscapes And Soils Of The Katanning District, D N. Sawkins, Department Of Agriculture And Food Jan 2007

Landscapes And Soils Of The Katanning District, D N. Sawkins, Department Of Agriculture And Food

Bulletins 4000 -

The publication aims to provide readers with the principles underlying the formation of local landscapes and soils, and the ability to identify landscapes and their associated soils.

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Cross-Layer Network Design Using Controllers, Michael J. Slavik Jan 2007

Cross-Layer Network Design Using Controllers, Michael J. Slavik

Electronic Theses and Dissertations 2000 - 2009

A cross-layer design architecture featuring a new network stack component called a controller is presented. The controller takes system status information from the protocol components and uses it to tune the behavior of the network stack to a given performance objective. A controller design strategy using a machine learning algorithm and a simulator is proposed, implemented, and tested. Results show the architecture and design strategy are capable of producing a network stack that outperforms the existing protocol stack for arbitrary performance objectives. The techniques presented give network designers the flexibility to easily tune the performance of their networks to suit …

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Digital Public History: Virtual Field Trips As Engaged Learning, Nancy Rubin Jan 2007

Digital Public History: Virtual Field Trips As Engaged Learning, Nancy Rubin

Electronic Theses and Dissertations 2000 - 2009

Digital Public History: Virtual Field Trips (VFTs) as Engaged Learning addresses new opportunities and challenges in teaching with technology, specifically, capturing the attention of the emerging "cyber-literate" generation by using virtual field trips to directly engage learners in public history and community memory. The project will consist of three parts: an assessment of the opportunities for technology integration in teaching and learning, the connection between digital resources and social studies, and case study of a virtual field trip using the Boca Raton Army Airfield (BRAAF) site. Our view of the past is influenced by the media, religious upbringing, monuments, memorials, …

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Determination Of Hydrodynamic Coefficients Of Multi-Hull Ships For Seakeeping Analysis, Jesse Ryan Chafin Jan 2007

Determination Of Hydrodynamic Coefficients Of Multi-Hull Ships For Seakeeping Analysis, Jesse Ryan Chafin

Electronic Theses and Dissertations 2000 - 2009

Linear and non-linear hydrodynamic coefficients of single and multiple hulls are obtained using the boundary-integral method. For linear frequency-domain analysis, the boundary-integral method based on a simple source distribution (Yeung [50] was used. The nonlinear time domain simulations were carried out using a boundary-integral algorithm based on the mixed Eulerian-Lagrangian (MEL) formulation (Longuet-Higgins and Cokelet (19] ). Also, linear time domain simulations were carried out by utilizing a simplified mixed Eulerian-Lagrangian formulation and the steady-state results compared with that obtained from linear-frequency domain analysis. Both 2D and 3D results were obtained for a range of parameters such as beam/draft, hull-separation/beam …

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Elementary Teachers' Perceptions Of Gender Bias, Joyce A. Barrows Jan 2007

Elementary Teachers' Perceptions Of Gender Bias, Joyce A. Barrows

Electronic Theses and Dissertations 2000 - 2009

The purpose of this study was to determine elementary teachers' perceptions of gender bias and further, to determine if additional information on gender bias might have an effect on how elementary teachers interact with their students. This study is valuable because gender bias situations can have a profound influence on how boys and girls view themselves in the world. Additionally, gender bias has been linked to a technological gap between males and females. The subjects for this study were 12 elementary teachers from a large metropolitan school district who participated in three different activities. The purpose of these activities was …

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Evaluation Of Corrosion Resistant Ferric-Alloys In Chloride Contaminated Concrete, Rodrigo J. Himiob Jan 2007

Evaluation Of Corrosion Resistant Ferric-Alloys In Chloride Contaminated Concrete, Rodrigo J. Himiob

Electronic Theses and Dissertations 2000 - 2009

The penetration of chloride ions through concrete can compromise the integrity of a structure. The chloride concentration, [Cl-], at which the corrosion process initiates is termed the critical chloride concentration or chloride threshold, [Cl-]th. One of the purposes of this research was to determine the [Cl-]th for various reinforcing alloys. Furthermore, the time-to-corrosion (TIC) was measured to determine the time at which bars become active. Both parameters, [Cl-]th and TTC, were found to be distributed; therefore, statistical analyses were performed to forecast the probability of activity. A new experimental procedure was introduced to increase the TTC data set by electrically …

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Experimental And Modeling Study Of Chloride Ingress Into Concrete And Reinforcement Corrosion Initiation, Hui Yu Jan 2007

Experimental And Modeling Study Of Chloride Ingress Into Concrete And Reinforcement Corrosion Initiation, Hui Yu

Electronic Theses and Dissertations 2000 - 2009

Effects of reinforcement and coarse aggregate on chloride ingression into concrete and reinforcement corrosion initiation have been studied with experimental and modeling (finite element method) analyses. Once specimens were fabricated and exposed to a chloride solution, various experimental techniques were employed to determine the effect of reinforcement and coarse aggregate on time-to-corrosion and chloride ingress and concentration at corrosion locations. Model analyses were performed to verify and explain the experimental results. Based upon the results, it was determined that unexpectedly higher chloride concentrations were present on the top of the rebar trace than that to the side at the same …

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Factors That Influence African American Males To Become Public School Teachers, Thomas E. Howard Jan 2007

Factors That Influence African American Males To Become Public School Teachers, Thomas E. Howard

Electronic Theses and Dissertations 2000 - 2009

This study was designed to investigate the career choice factors that influenced African American males to become public school teachers. The sample consisted of 122 African American male teachers and administrators who were employed in Florida's Public School System at the time of this study. This quantitative study utilized a computerized cross-sectional survey as the design. Twenty-one intrinsic and extrinsic career choice factors were examined using descriptive and inferential statistics, including independent sample t tests and ANOVA to determine the significance of their effects. Results of the study revealed that all twenty-one career choice factors influenced African American males in …

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Geometric Representation Of Continued Fractions, Ana Escuder Jan 2007

Geometric Representation Of Continued Fractions, Ana Escuder

Electronic Theses and Dissertations 2000 - 2009

The theory of continued fractions goes possibly as far back as 300 B.C. to Euclid. Some consider continued fractions as part of the "lost mathematics". I came across continued fractions for the first time while taking a graduate math class and I was amazed as how beautiful the representation of some numbers were using them and also how easy it was to understand the theory by making pictures. As an educator, I want to share this knowledge with my students and make it something that they could discover, manipulate, and appreciate. This paper is divided m three sections. The first …

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From Economics To Resources: Teaching Environmental Sustainability In Peru's Public Education, Ana Adriazola-Rodriguez Jan 2007

From Economics To Resources: Teaching Environmental Sustainability In Peru's Public Education, Ana Adriazola-Rodriguez

Electronic Theses and Dissertations 2000 - 2009

This dissertation examines the teaching of environmental awareness in Peru's public educational system and how it needs to be consciously taught and improved in order to overcome contamination and pollution of resources and decrease poverty. This is a situation afflicting a significant percentage of Peruvians, who face difficulty in surviving and living well because the scarcity of clean air and water, unpolluted land, and affordable energy, which are basic environmental resources. The teaching of environmental awareness, as mandated by Educational Peruvian Laws and curriculum, should be redesigned to promote environmental ethical awareness and sustainability to guard Peru's natural and cultural …

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From Subaltern To President: Evo Morales, New Social Movements, And Regional Autonomies In Bolivia, Gabriela Ovando Barrero Jan 2007

From Subaltern To President: Evo Morales, New Social Movements, And Regional Autonomies In Bolivia, Gabriela Ovando Barrero

Electronic Theses and Dissertations 2000 - 2009

This dissertation examines the processes of social, cultural, and political change that have taken place in Bolivia since the decade of the 1970s and how they have paved the way for the rise to power of indigenous people and the election of Evo Morales to the Presidency. It also addresses a growing trend toward more radical reforms to State structures after Morales' inauguration, which has created serious institutional chaos and a polarization of civil society. The reforms proposed by the Morales administration and its political party (Movimiento al Socialismo) include a new constitution which aims to re-found Bolivia favoring its …

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High-Speed High-Frequency Acoustic Communications In Ports And Shallow Water, Patrick Michael Blue Jan 2007

High-Speed High-Frequency Acoustic Communications In Ports And Shallow Water, Patrick Michael Blue

Electronic Theses and Dissertations 2000 - 2009

A detailed study of a novel method for high-speed acoustic communications in ports and shallow water is presented. A series of field experiments, coupled with simulated results using an acoustic channel model have been conducted to outline the optimal modulation schemes for use in the highly reverberant and Doppler dominated shallow water acoustic channel. Field experiments were conducted in the vicinity of the SeaTech marina and the Port Everglades turning basin in water depths of 2 to 15 meters and ranges of between 25 and 75 meters. An automated FAU acoustic modem transmitted BPSK and QPSK modulated messages centered at …

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Juicing The Potato: The Giffen Effect And Market Volatility, Brian Fiske Jan 2007

Juicing The Potato: The Giffen Effect And Market Volatility, Brian Fiske

Electronic Theses and Dissertations 2000 - 2009

The key objective of this thesis is to explain how aggregate agent investment behavior, in the presence of a Giffen Good, leads to excess market volatility. The thesis relies on two microeconomic models. The first model demonstrates how, in the presence of a Giffen Good, the demand curve is discontinuous and upward sloping. By analyzing the demand curve, price regions of potential volatility are identified. Using the first model as a foundation, a second model is introduced in which a speculator trades in a dynamic setting. In this dynamic framework, opportunities for profit making by the speculator are identified. The …

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Innovative Expansion Of Landfill Capacity Using Geogrid Reinforcements, R. Hayes Templeton Jan 2007

Innovative Expansion Of Landfill Capacity Using Geogrid Reinforcements, R. Hayes Templeton

Electronic Theses and Dissertations 2000 - 2009

An analytical investigation was conducted to evaluate the geotechnical safety and stability of MSW landfills constructed with significantly steepened slopes achieved through geosynthetic reinforcement. The primary motivation for this endeavor was to propose a new design/construction methodology for innovative expansion of landfill capacity. A 2-D plane strain linear elastic analysis was performed with ANSYS finite element software on full-scale MSW landfill structures (with and without geogrids), having slopes of 1:1, 1:2, and 1:3. Both local and global factors of safety were determined employing the Mohr-Coulomb failure criteria, and compared with traditional solutions using the Bishop's Modified Method. It was found …

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A Comparative Analysis Of Science-Technology-Society Standards In Elementary, Middle, And High School Science Curriculum Frameworks, Karen Marie Tobias Jan 2007

A Comparative Analysis Of Science-Technology-Society Standards In Elementary, Middle, And High School Science Curriculum Frameworks, Karen Marie Tobias

Electronic Theses and Dissertations 2000 - 2009

An analysis of curriculum frameworks from the fifty states to ascertain the compliance with the National Science Education Standards for integrating ScienceTechnology- Society (STS) themes is reported within this dissertation. Science standards for all fifty states were analyzed to determine if the STS criteria were integrated at the elementary, middle, and high school levels of education. The analysis determined the compliance level for each state, then compared each educational level to see if the compliance was similar across the levels. Compliance is important because research s)lows that using STS themes in the science classroom increases the student's understanding of the …

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A Comparison Of Model Checking Tools For Service Oriented Architectures, Raghava Venkat Jan 2007

A Comparison Of Model Checking Tools For Service Oriented Architectures, Raghava Venkat

Electronic Theses and Dissertations 2000 - 2009

Recently most of the research pertaining to Service-Oriented Architecture (SOA) is based on web services and how secure they are in terms of efficiency and effectiveness. This requires validation, verification, and evaluation of web services. Verification and validation should be collaborative when web services from different vendors are integrated together to carry out a coherent task. For this purpose, novel model checking technologies have been devised and applied to web services. "Model Checking" is a promising technique for verification and validation of software systems. WS-BPEL (Business Process Execution Language for Web Services) is an emerging standard language to describe web …

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A Phylogeny Of Mexican Ambystoma Salamanders (Caudata: Ambystomatidae) From Larval Characters, Lauren A. Cole Jan 2007

A Phylogeny Of Mexican Ambystoma Salamanders (Caudata: Ambystomatidae) From Larval Characters, Lauren A. Cole

Electronic Theses and Dissertations 2000 - 2009

A phylogeny of Mexican Ambystoma salamanders was constructed using larval morphology. Characters were scored for 19 ambystomatid species from Mexico and North America Twenty-five continuous characters came from external measurements of cranial and branchial features and ratios of measurements. Twenty-six categorical characters were scored from internal and external larval, branchial, and cranial features, as well as overall color and adult life history. Cladograms constructed from individual character matrices lack major resolution beyond individual species level. The consensus cladogram did not resolve the majority of species, and was similar to consensus results from previous cladistic analysis based on molecular characters. Convergent …

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A Novel Method For Human Face Enhancement For Video Images, Ernesto Anel Salas Jan 2007

A Novel Method For Human Face Enhancement For Video Images, Ernesto Anel Salas

Electronic Theses and Dissertations 2000 - 2009

The focus of this research is on images extracted from surveillance videos that have a low resolution and are taken under low illumination. In recent years, great advances have been made in face recognition and many studies mention results of 80% and 90% of recognition efficiency, however, most of these studies reported results using face images under controlled conditions. Current surveillance systems are equipped with low resolution cameras and are located in places with changing illumination, as opposed to a controlled environment. To be used in face recognition, images extracted from videos need to be normalized, enlarged and preprocessed. There …

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A Regression Model For Predicting Percent Built-Up Land Cover From Remotely Sensed Imagery Of Pucallpa, Peru, Drake H. Sprague Jan 2007

A Regression Model For Predicting Percent Built-Up Land Cover From Remotely Sensed Imagery Of Pucallpa, Peru, Drake H. Sprague

Electronic Theses and Dissertations 2000 - 2009

Accurate information about built-up land cover and population density is essential for sustainable urban growth, especially in lesser developed countries. Unfortunately, this data is often too expensive for planning agencies, prompting use of outdated and unreliable information. As a proxy for estimating population density, a linear regression model is proposed to test the relationship between the percentage of built-up land cover and vegetation in Pucallpa, Peru. Expert knowledge, low-cost moderate-resolution sate llite imagery, and high-resolution Google Earth images are used to estimate the percentage of built-up land cover at randomly assigned reference locations. Normalized Difference Vegetation Index (NDVI) data, acquired …

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A Study Of School Improvement Plans, School Decisionmaking And Advocacy, And Their Correlation To Student Academic Achievement, Maribel Marcos Curry Jan 2007

A Study Of School Improvement Plans, School Decisionmaking And Advocacy, And Their Correlation To Student Academic Achievement, Maribel Marcos Curry

Electronic Theses and Dissertations 2000 - 2009

Parent involvement literature reveals that parents play an important role in student academic achievement. The School Advisory Councils are the major outlet for parents to engage in decision-making and advocacy skills in Broward County. The School Improvement Plans are the major output of the School Advisory Councils and this document contains many strategies that schools should follow in order to increase achievement. The purpose of this study was to determine if School Improvement Plans and school decision-making and advocacy had any correlation to academic achievement. The researcher investigated this utilizing two research methods: a survey to investigate if school decision-making …

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A Study In Implementing Autonomous Video Surveillance Systems Based On Optical Flow Concept, Alvaro A. Fonseca Jan 2007

A Study In Implementing Autonomous Video Surveillance Systems Based On Optical Flow Concept, Alvaro A. Fonseca

Electronic Theses and Dissertations 2000 - 2009

Autonomous video surveillance systems are usually built with several functional blocks such as motion detection, foreground and background separation, object tracking, depth estimation, feature extraction and behavioral analysis of tracked objects. Each of those blocks is usually designed with different techniques and algorithms, which may need significant computational and hardware resources. In this thesis we present a surveillance system based on an optical flow concept, as a main unit on which other functional blocks depend. Optical flow limitations, capabilities and possible problem solutions are discussed in this thesis. Moreover, performance evaluation of various methods in handling occlusions, rigid and non-rigid …

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A Study On Random Sum Statistics: Application To Wireless Network Performance Analysis, Suwat Pattaramalai Jan 2007

A Study On Random Sum Statistics: Application To Wireless Network Performance Analysis, Suwat Pattaramalai

Electronic Theses and Dissertations 2000 - 2009

The statistics of random sum is studied and used to evaluate performance metrics in wireless networks. Pertinent wireless network performance measures such as call completion/dropping probabilities and the average number of handovers usually require the probability distributions of the cell dwell time and call holding time; and are therefore not easy to evaluate. The proposed performance evaluation technique requires the moments of the cell dwell time and is given in terms of the Laplace transform function of the call holding time. Multimedia services that have Weibull and generalized gamma distributed call holding times are investigated. The proposed approximation method uses …

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A Study Of The Underwater Acoustic Propagation In A Turning Basin Modeled As A Three-Dimensional Duct Closed At One End Using The Method Of Images, Matthew D. Staska Jan 2007

A Study Of The Underwater Acoustic Propagation In A Turning Basin Modeled As A Three-Dimensional Duct Closed At One End Using The Method Of Images, Matthew D. Staska

Electronic Theses and Dissertations 2000 - 2009

A computer-efficient model of the underwater acoustic propagation m a shallow, three-dimensional duct closed at one end has been developed using the method of images. Presented in this research is the development of this three-dimensional method of images analysis for a rectangular duct. Using this analysis, a model of the impulse response of the acoustic channel is constructed. Also presented in this work is the actual impulse response collected during field experimentation in the south turning basin of Port Everglades in Fort Lauderdale, Florida. The results demonstrate that the impulse response is modeled with a relative echo magnitude error of …

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An Investigation Into The Acoustic Variability And The Attenuation Of An Acoustic Signal Within A Port Environment Focusing On Port Everglades, Florida, Daniel Sheahan Jan 2007

An Investigation Into The Acoustic Variability And The Attenuation Of An Acoustic Signal Within A Port Environment Focusing On Port Everglades, Florida, Daniel Sheahan

Electronic Theses and Dissertations 2000 - 2009

A methodology for characterizing the acoustical properties of a port environment, namely Port Everglades, has been proposed and carried out. This approach includes both a port-wide analysis of how the basic oceanographic features within the port impact the acoustic properties, and also a more focused sampling methodology within a small region of Port Everglades, allowing for the acoustic characteristics, including ambient noise, and an approximate signal absorption to be computed. The results documented through the duration of this research indicate that the temperature variation throughout the port is the principal contributor to the characteristics of the sound velocity profile. Ambient …

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Automatic Station Keeping Of Small Twin Screw Boats, James H. Vanzwieten Jan 2007

Automatic Station Keeping Of Small Twin Screw Boats, James H. Vanzwieten

Electronic Theses and Dissertations 2000 - 2009

This work details the development of tools and controllers for station keeping control of twin screw vessels. A fundamental analysis is conducted of the dynamics of twin screw displacement hull vessels and their actuator systems, where the response characteristics and maneuverability are quantified through a series of full scale trials conducted in different environmental conditions while recording the environmental conditions, actuator states, and geodetic and inertial measurements. The data from these maneuvers were repeatable from run to run and thus provide valuable benchmarks for several maneuvers and the measured actuator response provides valuable set points of performance characteristics/limitations for control …

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Behavioral Responses Of Leatherback Juveniles (Dermochelys Coriacea L) To Lights Used In The Longline Fishery, Jodie M. Gless Jan 2007

Behavioral Responses Of Leatherback Juveniles (Dermochelys Coriacea L) To Lights Used In The Longline Fishery, Jodie M. Gless

Electronic Theses and Dissertations 2000 - 2009

The pelagic longline fishery is responsible for significant mortality to sea turtles as a result of foul hooking, entanglement in the lines, and internal injury after consuming the baited hook. Bait, gear and lights (used to attract the target fishes to the baits at night) are three variables that could also attract sea turtles to the lines. This study tests the role of the lights in attracting leatherback (Dermochelys coriacea) turtles and compares their behavior to the loggerhead (Caretta carelta), shown in previous studies to orient toward both lightsticks and battery powered LEDs used in the fishery. The same lights …

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Belongingness And Integrative Motivation In Second Language Acquisition, Robb. Kvasnak Jan 2007

Belongingness And Integrative Motivation In Second Language Acquisition, Robb. Kvasnak

Electronic Theses and Dissertations 2000 - 2009

This study investigates the perceptions that second language students have of those who speak the language that these students are trying to acquire and examines how these perceptions relate to students' progress in acquiring the target language. The study is based on the psychological theory of the need to belong, i.e. belongingness as well as on the concept of integrative motivation. This study is a qualitative investigation that uses the Repertory Grid Technique and Personal Construct Theory in order to elicit subject perceptions and their constructs. Membership checking was carried out with nine of the originally interviewed 22 subjects in …

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Maximizing Single Opposition Observations Of Asteroids, Steven J. Higley Jan 2007

Maximizing Single Opposition Observations Of Asteroids, Steven J. Higley

Theses and Dissertations

No abstract provided.

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A Precision Positioning Actuator System Using A Pid Controller, Vipin A. Guda Jan 2007

A Precision Positioning Actuator System Using A Pid Controller, Vipin A. Guda

Theses and Dissertations

No abstract provided.

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