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Title: COLLABORATIVE DISPUTE RESOLUTION IN SUPERFUND ENFORCEMENT:DOES THE RESOLUTION APPROACH VARY BY COMMUNITY-LEVEL SOCIODEMOGRAPHIC CHARACTERISTICS?.
Creator: Collins, Mary, Marshall, Brent, University of Central Florida
Abstract / Description: This research examines environmental dispute resolution as applied to Superfund site cleanup and how the use of collaborative dispute resolution approaches, in particular Alternative Dispute Resolution and Community Involvement, are related to a community's socioeconomic and demographic profile. It examines the sociodemographic characteristics of residents living in census tracts containing Superfund sites in relation to the type of dispute resolution technique used. I hypothesize that...
Show moreThis research examines environmental dispute resolution as applied to Superfund site cleanup and how the use of collaborative dispute resolution approaches, in particular Alternative Dispute Resolution and Community Involvement, are related to a community's socioeconomic and demographic profile. It examines the sociodemographic characteristics of residents living in census tracts containing Superfund sites in relation to the type of dispute resolution technique used. I hypothesize that collaborative dispute resolution techniques, as opposed to traditional settlement and/or litigation, are less likely to occur in Superfund communities with high poverty levels and high minority populations than in those with low poverty levels and low minority populations. Although minority and lower class communities are less likely to be placed on the National Priorities List (NPL), are slower to be cleaned up once on the NPL, and experience lower quality cleanups (O'Neil 2005; Sigman 2001; Omohundro 2004), the findings of this research indicate that the dispute resolution processes studied here do not contribute to such environmental clean up injustices. Minority status and poverty levels do not impact the likelihood that collaborative dispute resolution will be used in settling Superfund disputes. This analysis does show a significant correlation between education and the use of collaborative dispute resolution. Superfund communities in which residents have low educational attainment are less likely to use collaborative dispute resolution. Low educational levels may be the paramount disadvantage to overcome in the use and successful implementation of collaborative dispute resolution.
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Date Issued: 2008
Identifier: CFE0002118, ucf:47532
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002118

Title: VARIABLE RESOLUTION & DIMENSIONAL MAPPING FOR 3D MODEL OPTIMIZATION.
Creator: Venezia, Joseph, Kasparis, Takis, University of Central Florida
Abstract / Description: Three-dimensional computer models, especially geospatial architectural data sets, can be visualized in the same way humans experience the world, providing a realistic, interactive experience. Scene familiarization, architectural analysis, scientific visualization, and many other applications would benefit from finely detailed, high resolution, 3D models. Automated methods to construct these 3D models traditionally has produced data sets that are often low fidelity or inaccurate; otherwise,...
Show moreThree-dimensional computer models, especially geospatial architectural data sets, can be visualized in the same way humans experience the world, providing a realistic, interactive experience. Scene familiarization, architectural analysis, scientific visualization, and many other applications would benefit from finely detailed, high resolution, 3D models. Automated methods to construct these 3D models traditionally has produced data sets that are often low fidelity or inaccurate; otherwise, they are initially highly detailed, but are very labor and time intensive to construct. Such data sets are often not practical for common real-time usage and are not easily updated. This thesis proposes Variable Resolution & Dimensional Mapping (VRDM), a methodology that has been developed to address some of the limitations of existing approaches to model construction from images. Key components of VRDM are texture palettes, which enable variable and ultra-high resolution images to be easily composited; texture features, which allow image features to integrated as image or geometry, and have the ability to modify the geometric model structure to add detail. These components support a primary VRDM objective of facilitating model refinement with additional data. This can be done until the desired fidelity is achieved as practical limits of infinite detail are approached. Texture Levels, the third component, enable real-time interaction with a very detailed model, along with the flexibility of having alternate pixel data for a given area of the model and this is achieved through extra dimensions. Together these techniques have been used to construct models that can contain GBs of imagery data.
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Date Issued: 2009
Identifier: CFE0002837, ucf:48081
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002837

Title: ESSAYS IN OUTSOURCED IS PROGRAM MANAGEMENT.
Creator: Parolia, Neeraj, Jiang, James, University of Central Florida
Abstract / Description: IS vendor organizations are increasingly using program management practices to manage complex projects (Gierra 2004). The move to program teams is due to the realization that the management of many client projects and their underlying dependencies requires teamwork among project managers from different projects (Cooke-Davies 2002; Ferratt et al. 2006; Sanghera 2007). With two separate studies, first we extend the team competence framework and utilize organizational learning theory to...
Show moreIS vendor organizations are increasingly using program management practices to manage complex projects (Gierra 2004). The move to program teams is due to the realization that the management of many client projects and their underlying dependencies requires teamwork among project managers from different projects (Cooke-Davies 2002; Ferratt et al. 2006; Sanghera 2007). With two separate studies, first we extend the team competence framework and utilize organizational learning theory to understand the antecedents and outcomes of teamwork behaviors. Empirical results from the first study indicated that teamwork behaviors within the program team were significantly related to an increase in team competencies of personnel development, methodology development and dissemination and customer focus. Further, the three program team competencies were a significant predictor of program outcomes. In the second study, we investigate the outcomes of conflict resolution and their impact on program performance. The results indicated that conflict resolution can enhance the level of communication, mutual support and effort among IS program members Directions for practitioners and implications for future research are discussed.
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Date Issued: 2008
Identifier: CFE0002344, ucf:47794
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002344

Title: Development of an MRM federation system using COTS simulations.
Creator: Kim, Jaeho, Lee, Gene, Elshennawy, Ahmad, Rabelo, Luis, University of Central Florida
Abstract / Description: The goal of this research is to build an experimental environment for the Simulation Interoperability Laboratory (SIL) of the University of Central Florida (UCF). The Simulation Interoperability Laboratory (SIL) is researching about multi-resolution modeling(MRM), with a focus on military field uses. This thesis proposes steps to develop an MRM federation system and build two different MRM systems using COTS simulations (SIMBox, VR-Forces, and MASA Sword). This report is written to provide...
Show moreThe goal of this research is to build an experimental environment for the Simulation Interoperability Laboratory (SIL) of the University of Central Florida (UCF). The Simulation Interoperability Laboratory (SIL) is researching about multi-resolution modeling(MRM), with a focus on military field uses. This thesis proposes steps to develop an MRM federation system and build two different MRM systems using COTS simulations (SIMBox, VR-Forces, and MASA Sword). This report is written to provide the basis for a time-based MRM federation study in the Simulation Interoperability Laboratory. The report describes many definitions and notions related to Multi-Resolution Modeling(MRM) and discusses examples to make better understanding for further research. MRM is relatively new research, and there are high demands for integrating simulators running in military field purposes. Most military-related research is based on simulators currently being used in the military; this poses a problem for research because the data is classified, resulting in many limitations for outside researchers to see the military's process for building an MRM system or the results of the research. Therefore, development of the MRM federation using COTS simulations can provide many examples of MRM issues for future research.Keywords: Multi-Resolution Modeling, MRM, aggregation, disaggregation, MRE, MRM approach.
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Date Issued: 2018
Identifier: CFE0007576, ucf:52565
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007576

Title: Super Resolution of Wavelet-Encoded Images and Videos.
Creator: Atalay, Vildan, Foroosh, Hassan, Bagci, Ulas, Hughes, Charles, Pensky, Marianna, University of Central Florida
Abstract / Description: In this dissertation, we address the multiframe super resolution reconstruction problem for wavelet-encoded images and videos. The goal of multiframe super resolution is to obtain one or more high resolution images by fusing a sequence of degraded or aliased low resolution images of the same scene. Since the low resolution images may be unaligned, a registration step is required before super resolution reconstruction. Therefore, we first explore in-band (i.e. in the wavelet-domain) image...
Show moreIn this dissertation, we address the multiframe super resolution reconstruction problem for wavelet-encoded images and videos. The goal of multiframe super resolution is to obtain one or more high resolution images by fusing a sequence of degraded or aliased low resolution images of the same scene. Since the low resolution images may be unaligned, a registration step is required before super resolution reconstruction. Therefore, we first explore in-band (i.e. in the wavelet-domain) image registration; then, investigate super resolution.Our motivation for analyzing the image registration and super resolution problems in the wavelet domain is the growing trend in wavelet-encoded imaging, and wavelet-encoding for image/video compression. Due to drawbacks of widely used discrete cosine transform in image and video compression, a considerable amount of literature is devoted to wavelet-based methods. However, since wavelets are shift-variant, existing methods cannot utilize wavelet subbands efficiently. In order to overcome this drawback, we establish and explore the direct relationship between the subbands under a translational shift, for image registration and super resolution. We then employ our devised in-band methodology, in a motion compensated video compression framework, to demonstrate the effective usage of wavelet subbands.Super resolution can also be used as a post-processing step in video compression in order to decrease the size of the video files to be compressed, with downsampling added as a pre-processing step. Therefore, we present a video compression scheme that utilizes super resolution to reconstruct the high frequency information lost during downsampling. In addition, super resolution is a crucial post-processing step for satellite imagery, due to the fact that it is hard to update imaging devices after a satellite is launched. Thus, we also demonstrate the usage of our devised methods in enhancing resolution of pansharpened multispectral images.
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Date Issued: 2017
Identifier: CFE0006854, ucf:51744
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006854

Title: A STUDY OF PUBLIC EMPLOYEE LABOR LAW IN THE UNITED STATES.
Creator: Bula, Oleh, Murray, Kenneth, University of Central Florida
Abstract / Description: This study examined the legal issues of public employee labor relations in the United States. Included in this study is a review of relevant case law as it pertains to collective bargaining in the public sector. In addition to reviewing the case law, this study researched the statutory language of each state for public sector collective bargaining. The study includes a review, analysis, and summary of the state and federal laws for public sector collective bargaining. The collective...
Show moreThis study examined the legal issues of public employee labor relations in the United States. Included in this study is a review of relevant case law as it pertains to collective bargaining in the public sector. In addition to reviewing the case law, this study researched the statutory language of each state for public sector collective bargaining. The study includes a review, analysis, and summary of the state and federal laws for public sector collective bargaining. The collective bargaining process in the United States is designed to resolve disputes between two parties, the employer and the employee. The resolution of these disputes often depends on the relative bargaining power of each party. The private sector has a collective bargaining process that has been well established since the passage of the National Labor Relations Act in 1935 and the Labor-Management Relations Act of 1947. The federal laws that have been implemented in the last fifty years, to include the Civil Rights Act of 1964, the Equal Employment Opportunity Act of 1972, the American with Disabilities Act of 1990, among others, cover the scope of almost all of the private sector collective bargaining (Oberer, 1994). The public sector contains 50 different state laws and several federal laws defining the scope of collective bargaining for public employees. The bargaining process in the public sector takes place in the context of the political arena. This political influence, which is unique in each state and at each level of government, provides additional steps to the bargaining process that further differentiate public sector bargaining from private (Valletta, 1985). This study provides conclusions on certain aspects of public sector collective bargaining that lead to dispute resolution and contract negotiation to include fact-finding procedures, mediation, arbitration, and strike policies, in the current state of the law. Recommendations are made to public officials, policy makers, and other stakeholders for the future of public employee labor relations in the United States.
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Date Issued: 2005
Identifier: CFE0000353, ucf:46293
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000353

Title: KNOWLEDGE BASED MEASUREMENT OF ENHANCING BRAIN TISSUE IN ANISOTROPIC MR IMAGERY.
Creator: Leach, Eric, Shah, Mubarak, University of Central Florida
Abstract / Description: Medical Image Analysis has emerged as an important field in the computer vision community. In this thesis, two important issues in medical imaging are addressed and a solution for each is derived and synergistically combined as one coherent system. Firstly, a novel approach is proposed for High Resolution Volume (HRV) construction by combining different frequency components at multiple levels, which are separated by using a multi-resolution pyramid structure. Current clinical imaging...
Show moreMedical Image Analysis has emerged as an important field in the computer vision community. In this thesis, two important issues in medical imaging are addressed and a solution for each is derived and synergistically combined as one coherent system. Firstly, a novel approach is proposed for High Resolution Volume (HRV) construction by combining different frequency components at multiple levels, which are separated by using a multi-resolution pyramid structure. Current clinical imaging protocols make use of multiple orthogonal low resolution scans to measure the size of the tumor. The highly anisotropic data result in difficulty and even errors in tumor assessment. In previous approaches, simple interpolation has been used to construct HRVs from multiple low resolution volumes (LRVs), which fail when large inter-plane spacing is present. In our approach, Laplacian pyramids containing band-pass contents are first computed from registered LRVs. The Laplacian images are expanded in their low resolution axes separately and then fused at each level. A Gaussian pyramid is recovered from the fused Laplacian pyramid, where a volume at the bottom level of the Gaussian pyramid is the constructed HRV. The effectiveness of the proposed approach is validated by using simulated images. The method has also been applied to real clinical data and promising experimental results are demonstrated. Secondly, a new knowledge-based framework to automatically quantify the volume of enhancing tissue in brain MR images is proposed. Our approach provides an objective and consistent way to evaluate disease progression and assess the treatment plan. In our approach, enhanced regions are first located by comparing the difference between the aligned set of pre- and post-contrast T1 MR images. Since some normal tissues may also become enhanced by the administration of Gd-DTPA, using the intensity difference alone may not be able to distinguish normal tissue from the tumor. Thus, we propose a new knowledge-based method employing knowledge of anatomical structures from a probabilistic brain atlas and the prior distribution of brain tumor to identify the real enhancing tissue. Our approach has two main advantages. i) The results are invariant to the image contrast change due to the usage of the probabilistic knowledge-based framework. ii) Using the segmented regions instead of independent pixels facilitates an approach that is much less sensitive to small registration errors and image noise. The obtained results are compared to the ground truth for validation and it is shown that the proposed method can achieve accurate and consistent measurements.
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Date Issued: 2007
Identifier: CFE0001803, ucf:47378
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001803

Title: NONCARDIAC CHEST PAIN: THE USE OF HIGH RESOLUTION MANOMETRY AS A DIAGNOSTIC TOOL.
Creator: Hilal, Iman, Blackwell, Christopher, Decker, Jonathan, Quagliata, Joseph, University of Central Florida
Abstract / Description: Chest pain is one of the most common symptoms responsible for emergency department and primary care office visits in the United States. Chest pain can be noncardiac and may be attributed to multiple causes. Esophageal disorders including reflux, motility and functional conditions, affect a large proportion of patients with NCCP and lead to significant morbidity. The use of HRM has changed the diagnostic approach to esophageal motility disorders. It is the most specific and sensitive test for...
Show moreChest pain is one of the most common symptoms responsible for emergency department and primary care office visits in the United States. Chest pain can be noncardiac and may be attributed to multiple causes. Esophageal disorders including reflux, motility and functional conditions, affect a large proportion of patients with NCCP and lead to significant morbidity. The use of HRM has changed the diagnostic approach to esophageal motility disorders. It is the most specific and sensitive test for diagnosing motor disorders and a promising procedure in detecting dysmotility disorders in patients with NCCP. Despite the increased sensitivity of HRM, the main indications for esophageal manometry exclude NCCP.This study assessed the percentage of undiagnosed esophageal motility disorders in patients with NCCP referred for high resolution manometry. Differences in HRM findings in patients with NCCP versus patients meeting AGA recommendations for the clinical use of esophageal manometry were also compared. A retrospective descriptive design was utilized. Two hundred-nineteen patient charts were reviewed. One hundred sixty-eight (77%) patients underwent HRM and met AGA recommendations for esophageal manometry; 51 (23%) patients underwent the procedure after receiving a NCCP diagnosis.Findings showed that 116 (69%) patients in the AGA group had abnormal findings while 52 (31%) did not. In the NCCP group 34 (67%) had abnormal findings compared to 17 (33%) who did not. To compare normal and abnormal HRM findings in patients with NCCP versus those meeting AGA criteria, Chi-Square analysis was performed between the groups. The results were not statistically significant (p = 0.10).There were no significant differences in the results of HRM in both groups indicating the findings on HRM are the same despite the indication for the procedure. The findings support the use of HRM as a diagnostic tool in patients with chest pain after cardiac workup and endoscopic evaluation. This indicates a possible need to update the AGA indications for esophageal manometry and increase the awareness among healthcare providers regarding the use of HRM in patients with chest pain. Implication for future research is also discussed
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Date Issued: 2012
Identifier: CFE0004545, ucf:49256
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0004545

Title: SEARCH FOR GAS-GIANTS AROUND LATE-M DWARFS.
Creator: Deshpande, Rohit, Martin , Eduardo, University of Central Florida
Abstract / Description: We carried out a near-infrared radial velocity search for Jupiter-mass planets around 36 late M dwarfs. This survey was the first of its kind undertaken to monitor radial velocity variability of these faint dwarfs. For this unique survey we employed the 10-m Keck II on Mauna Kea in Hawaii. With a resolution of 20,000 on the near-infrared spectrograph, NIRSPEC, we monitored these stars over four epochs in 2007. In addition to the measurement of relative radial velocity we established physical...
Show moreWe carried out a near-infrared radial velocity search for Jupiter-mass planets around 36 late M dwarfs. This survey was the first of its kind undertaken to monitor radial velocity variability of these faint dwarfs. For this unique survey we employed the 10-m Keck II on Mauna Kea in Hawaii. With a resolution of 20,000 on the near-infrared spectrograph, NIRSPEC, we monitored these stars over four epochs in 2007. In addition to the measurement of relative radial velocity we established physical properties of these stars. The physical properties of M dwarfs we determined included the identification of neutral atomic lines, the measurement of pseudo-equivalent widths, masses, surface gravity, effective temperature, absolute radial velocities, rotational velocities and rotation periods. The iden- tification of neutral atomic lines was carried out using the Vienna Atomic line Database. We were able to confirm these lines that were previously identified. We also found that some of the lines observed in the K-type stars, such as Mg I though weak, still persist in late M dwarfs. Using the measurement of pseudo-equivalent widths (p-EW) of 13 neutral atomic lines, we have established relations between p-EW and spectral type. Such relations serve as a tool in determining the spectral type of an unknown dwarf star by means of measuring its p-EW. We employed the mass-luminosity relation to compute the masses of M dwarfs. Our calculations indicate these dwarfs to be in the range of 0.1 to 0.07 solar masses. This suggests that some of the late M dwarfs appear to be in the Brown dwarf regime. Assuming their radii of 0.1 solar radii, we calculated their surface gravity. The mean surface gravity is, log g = 5.38. Finally their effective temperature was determined by using the spectral-type temperature relationship. Our calculations show effective temperatures in the range of 3000 to 2300 K. Comparison of these values with models in literature show a good agreement. The absolute radial and rotational velocities of our targets were also calculated. Values of rotational velocities indicate that M dwarfs are, in general, slow rotators. Using our result and that from literature, we extended our study of rotational velocities to L dwarfs. Our observations show an increase in rotational velocities from late M to L dwarfs. We also find that the mean periods of M dwarfs are less than 10 hours. In order to improve our precision in measuring relative radial velocity (RV), we employed the use of deconvolution method. With this method we were able to ameliorate relative RV precision from 300 m/s to 200 m/s. This was a substantial improvement in our ability to detect gas-giant planets. However none of the 15 dwarfs we monitored indicate a presence of companions. This null result was then used to compute the upper limit to the binary frequency and close-in Jupiter mass planetary frequency. We find the binary frequency to be 11% while the planetary frequency was 1.20%.
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Date Issued: 2010
Identifier: CFE0003288, ucf:48550
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003288

Title: GABOR DOMAIN OPTICAL COHERENCE MICROSCOPY.
Creator: Murali, Supraja, Rolland, Jannick, University of Central Florida
Abstract / Description: Time domain Optical Coherence Tomography (TD-OCT), first reported in 1991, makes use of the low temporal coherence properties of a NIR broadband laser to create depth sectioning of up to 2mm under the surface using optical interferometry and point to point scanning. Prior and ongoing work in OCT in the research community has concentrated on improving axial resolution through the development of broadband sources and speed of image acquisition through new techniques such as Spectral domain OCT ...
Show moreTime domain Optical Coherence Tomography (TD-OCT), first reported in 1991, makes use of the low temporal coherence properties of a NIR broadband laser to create depth sectioning of up to 2mm under the surface using optical interferometry and point to point scanning. Prior and ongoing work in OCT in the research community has concentrated on improving axial resolution through the development of broadband sources and speed of image acquisition through new techniques such as Spectral domain OCT (SD-OCT). In SD-OCT, an entire depth scan is acquired at once with a low numerical aperture (NA) objective lens focused at a fixed point within the sample. In this imaging geometry, a longer depth of focus is achieved at the expense of lateral resolution, which is typically limited to 10 to 20 µm. Optical Coherence Microscopy (OCM), introduced in 1994, combined the advantages of high axial resolution obtained in OCT with high lateral resolution obtained by increasing the NA of the microscope placed in the sample arm. However, OCM presented trade-offs caused by the inverse quadratic relationship between the NA and the DOF of the optics used. For applications requiring high lateral resolution, such as cancer diagnostics, several solutions have been proposed including the periodic manual re-focusing of the objective lens in the time domain as well as the spectral domain C-mode configuration in order to overcome the loss in lateral resolution outside the DOF. In this research, we report for the first time, high speed, sub-cellular imaging (lateral resolution of 2 µm) in OCM using a Gabor domain image processing algorithm with a custom designed and fabricated dynamic focus microscope interfaced to a Ti:Sa femtosecond laser centered at 800 nm within an SD-OCM configuration. It is envisioned that this technology will provide a non-invasive replacement for the current practice of multiple biopsies for skin cancer diagnosis. The research reported here presents three important advances to this technology all of which have been demonstrated in full functional hardware conceived and built during the course of this research. First, it has been demonstrated that the coherence gate created by the femtosecond laser can be coupled into a scanning optical microscope using optical design methods to include liquid lens technology that enables scanning below the surface of skin with no moving parts and at high resolution throughout a 2×2×2 mm imaging cube. Second, the integration the variable-focus liquid lens technology within a fixed-optics microscope custom optical design helped increase the working NA by an order of magnitude over the limitation imposed by the liquid lens alone. Thus, this design has enabled homogenous axial and lateral resolution at the micron-level (i.e., 2 µm) while imaging in the spectral domain, and still maintaining in vivo speeds. The latest images in biological specimens clearly demonstrate sub-cellular resolution in all dimensions throughout the imaging volume. Third, this new modality for data collection has been integrated with an automated Gabor domain image registration and fusion algorithm to provide full resolution images across the data cube in real-time. We refer to this overall OCM method as Gabor domain OCM (GD-OCM). These advantages place GD-OCM in a unique position with respect to the diagnosis of cancer, because when fully developed, it promises to enable fast and accurate screening for early symptoms that could lead to prevention. The next step for this technology is to apply it directly, in a clinical environment. This step is underway and is expected to be reported by the next generation of researchers within this group.
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Date Issued: 2009
Identifier: CFE0002771, ucf:48137
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002771

Title: ELECTROMECHANICAL LIFTING ACTUATION OF A MEMS CANTILEVER AND NANO-SCALE ANALYSIS OF DIFFUSION IN SEMICONDUCTOR DEVICE DIELECTRICS.
Creator: Rezadad, Imen, Peale, Robert, Del Barco, Enrique, Tetard, Laurene, Prenitzer, Brenda, University of Central Florida
Abstract / Description: This dissertation presents experimental and theoretical studies of physical phenomena in micro- and nano-electronic devices. Firstly, a novel and unproven means of electromechanical actuation in a micro-electro-mechanical system (MEMS) cantilever was investigated. In nearly all MEMS devices, electric forces cause suspended components to move toward the substrate. I demonstrated a design with the unusual and potentially very useful property of having a suspended MEMS cantilever lift away from...
Show moreThis dissertation presents experimental and theoretical studies of physical phenomena in micro- and nano-electronic devices. Firstly, a novel and unproven means of electromechanical actuation in a micro-electro-mechanical system (MEMS) cantilever was investigated. In nearly all MEMS devices, electric forces cause suspended components to move toward the substrate. I demonstrated a design with the unusual and potentially very useful property of having a suspended MEMS cantilever lift away from the substrate. The effect was observed by optical micro-videography, by electrical sensing, and it was quantified by optical interferometry. The results agree with predictions of analytic and numerical calculations. One potential application is infrared sensing in which absorbed radiation changes the temperature of the cantilever, changing the duty cycle of an electrically-driven, repetitively closing micro-relay.Secondly, ultra-thin high-k gate dielectric layers in two 22 nm technology node semiconductor devices were studied. The purpose of the investigation was to characterize the morphology and composition of these layers as a means to verify whether the transmission electron microscope (TEM) with energy dispersive spectroscopy (EDS) could sufficiently resolve the atomic diffusion at such small length scales. Results of analytic and Monte-Carlo numerical calculations were compared to empirical data to validate the ongoing viability of TEM EDS as a tool for nanoscale characterization of semiconductor devices in an era where transistor dimensions will soon be less than 10 nm.
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Date Issued: 2015
Identifier: CFE0006228, ucf:51075
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006228

Title: Prototype Development in General Purpose Representation and Association Machine Using Communication Theory.
Creator: Li, Huihui, Wei, Lei, Rahnavard, Nazanin, Vosoughi, Azadeh, Da Vitoria Lobo, Niels, Wang, Wei, University of Central Florida
Abstract / Description: Biological system study has been an intense research area in neuroscience and cognitive science for decades of years. Biological human brain is created as an intelligent system that integrates various types of sensor information and processes them intelligently. Neurons, as activated brain cells help the brain to make instant and rough decisions. From the 1950s, researchers start attempting to understand the strategies the biological system employs, then eventually translate them into machine...
Show moreBiological system study has been an intense research area in neuroscience and cognitive science for decades of years. Biological human brain is created as an intelligent system that integrates various types of sensor information and processes them intelligently. Neurons, as activated brain cells help the brain to make instant and rough decisions. From the 1950s, researchers start attempting to understand the strategies the biological system employs, then eventually translate them into machine-based algorithms. Modern computers have been developed to meet our need to handle computational tasks which our brains are not capable of performing with precision and speed. While in these existing man-made intelligent systems, most of them are designed for specific purposes. The modern computers solve sophistic problems based on fixed representation and association formats, instead of employing versatile approaches to explore the unsolved problems.Because of the above limitations of the conventional machines, General Purpose Representation and Association Machine (GPRAM) System is proposed to focus on using a versatile approach with hierarchical representation and association structures to do a quick and rough assessment on multitasks. Through lessons learned from neuroscience, error control coding and digital communications, a prototype of GPRAM system by employing (7,4) Hamming codes and short Low-Density Parity Check (LDPC) codes is implemented. Types of learning processes are presented, which prove the capability of GPRAM for handling multitasks.Furthermore, a study of low resolution simple patterns and face images recognition using an Image Processing Unit (IPU) structure for GPRAM system is presented. IPU structure consists of a randomly constructed LDPC code, an iterative decoder, a switch and scaling, and decision devices. All the input images have been severely degraded to mimic human Visual Information Variability (VIV) experienced in human visual system. The numerical results show that 1) IPU can reliably recognize simple pattern images in different shapes and sizes; 2) IPU demonstrates an excellent multi-class recognition performance for the face images with high degradation. Our results are comparable to popular machine learning recognition methods towards images without any quality degradation; 3) A bunch of methods have been discussed for improving IPU recognition performance, e.g. designing various detection and power scaling methods, constructing specific LDPC codes with large minimum girth, etc.Finally, novel methods to optimize M-ary PSK, M-ary DPSK, and dual-ring QAM signaling with non-equal symbol probabilities over AWGN channels are presented. In digital communication systems, MPSK, MDPSK, and dual-ring QAM signaling with equiprobable symbols have been well analyzed and widely used in practice. Inspired by bio-systems, we suggest investigating signaling with non-equiprobable symbol probabilities, since in bio-systems it is highly-unlikely to follow the ideal setting and uniform construction of single type of system. The results show that the optimizing system has lower error probabilities than conventional systems and the improvements are dramatic. Even though the communication systems are used as the testing environment, clearly, our final goal is to extend current communication theory to accommodate or better understand bio-neural information processing systems.
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Date Issued: 2017
Identifier: CFE0006758, ucf:51846
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006758

Title: Methodological Improvements in the mRNA Profiling Assays for Incorporation into DNA Casework Workflows.
Creator: Volk, Paris, Ballantyne, John, Gerasimova, Yulia, Baudelet, Matthieu, University of Central Florida
Abstract / Description: Currently, DNA profiling is the gold standard to identify an individual. However, determining body fluid origin is important in criminal investigations, offering additional information surrounding the circumstances of a crime. However, crime labs can only definitively identify blood and semen and presumptively saliva using techniques that consume time and sample and do not simultaneously identify all forensically relevant body fluids. This causes many crime labs to want to bypass body fluid...
Show moreCurrently, DNA profiling is the gold standard to identify an individual. However, determining body fluid origin is important in criminal investigations, offering additional information surrounding the circumstances of a crime. However, crime labs can only definitively identify blood and semen and presumptively saliva using techniques that consume time and sample and do not simultaneously identify all forensically relevant body fluids. This causes many crime labs to want to bypass body fluid identification altogether. Therefore, advances into more definitive molecular-based body fluid methods are necessary. One such technique is mRNA profiling because it provides a highly sensitive and specific approach to definitively identifying all relevant body fluids in parallel. Although advancements have been made, improvements to mRNA profiling methodologies still need to be researched such as 1) possible mRNA recovery from established DNA workflows and 2) possible integration of mRNA profiling into an upfront male DNA screening assay for triaging sexual-assault evidence likely to contain male DNA and reduce/eliminate a significant bottleneck in the standard DNA workflow of microscopic sperm identification. This study was designed to address these two issues by evaluating a novel way to recover RNA, for body fluid identification, from the waste fractions of a PrepFiler(TM) DNA extraction, and from the DNA extracts directly. Next, this study aimed to provide a relatively quick molecular-based approach for screening sexual-assault evidence. It involves extraction of RNA using the Dynabeads(TM) mRNA DIRECT(TM) Kit, while saving the extraction waste fractions for downstream male-DNA quantitation and STR profiling. The RNA is then used in a rapid and sensitive 1-step combined reverse transcription-HRM assay to positively detect the presence of sperm. Both non-conventional co-extraction methods successfully addressed current body fluid identification challenges and allowed for easy integration into existing workflows when single sourced, mixture and mock casework samples were analyzed.
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Date Issued: 2019
Identifier: CFE0007551, ucf:52627
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007551

Title: DESIGN AND ASSESSMENT OF COMPACT OPTICAL SYSTEMS TOWARDS SPECIAL EFFECTS IMAGING.
Creator: Chaoulov, Vesselin, Rolland, Jannick, University of Central Florida
Abstract / Description: A main challenge in the field of special effects is to create special effects in real time in a way that the user can preview the effect before taking the actual picture or movie sequence. There are many techniques currently used to create computer-simulated special effects, however current techniques in computer graphics do not provide the option for the creation of real-time texture synthesis. Thus, while computer graphics is a powerful tool in the field of special effects, it is neither...
Show moreA main challenge in the field of special effects is to create special effects in real time in a way that the user can preview the effect before taking the actual picture or movie sequence. There are many techniques currently used to create computer-simulated special effects, however current techniques in computer graphics do not provide the option for the creation of real-time texture synthesis. Thus, while computer graphics is a powerful tool in the field of special effects, it is neither portable nor does it provide work in real-time capabilities. Real-time special effects may, however, be created optically. Such approach will provide not only real-time image processing at the speed of light but also a preview option allowing the user or the artist to preview the effect on various parts of the object in order to optimize the outcome. The work presented in this dissertation was inspired by the idea of optically created special effects, such as painterly effects, encoded in images captured by photographic or motion picture cameras. As part of the presented work, compact relay optics was assessed, developed, and a working prototype was built. It was concluded that even though compact relay optics can be achieved, further push for compactness and cost-effectiveness was impossible in the paradigm of bulk macro-optics systems. Thus, a paradigm for imaging with multi-aperture micro-optics was proposed and demonstrated for the first time, which constitutes one of the key contributions of this work. This new paradigm was further extended to the most general case of magnifying multi-aperture micro-optical systems. Such paradigm allows an extreme reduction in size of the imaging optics by a factor of about 10 and a reduction in weight by a factor of about 500. Furthermore, an experimental quantification of the feasibility of optically created special effects was completed, and consequently raytracing software was developed, which was later commercialized by SmARTLens(TM). While the art forms created via raytracing were powerful, they did not predict all effects acquired experimentally. Thus, finally, as key contribution of this work, the principles of scalar diffraction theory were applied to optical imaging of extended objects under quasi-monochromatic incoherent illumination in order to provide a path to more accurately model the proposed optical imaging process for special effects obtained in the hardware. The existing theoretical framework was generalized to non-paraxial in- and out-of-focus imaging and results were obtained to verify the generalized framework. In the generalized non-paraxial framework, even the most complex linear systems, without any assumptions for shift invariance, can be modeled and analyzed.
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Date Issued: 2005
Identifier: CFE0000513, ucf:46447
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000513

Title: Arterial-level real-time safety evaluation in the context of proactive traffic management.
Creator: Yuan, Jinghui, Abdel-Aty, Mohamed, Eluru, Naveen, Hasan, Samiul, Cai, Qing, Wang, Liqiang, University of Central Florida
Abstract / Description: In the context of pro-active traffic management, real-time safety evaluation is one of the most important components. Previous studies on real-time safety analysis mainly focused on freeways, seldom on arterials. With the advancement of sensing technologies and smart city initiative, more and more real-time traffic data sources are available on arterials, which enables us to evaluate the real-time crash risk on arterials. However, there exist substantial differences between arterials and...
Show moreIn the context of pro-active traffic management, real-time safety evaluation is one of the most important components. Previous studies on real-time safety analysis mainly focused on freeways, seldom on arterials. With the advancement of sensing technologies and smart city initiative, more and more real-time traffic data sources are available on arterials, which enables us to evaluate the real-time crash risk on arterials. However, there exist substantial differences between arterials and freeways in terms of traffic flow characteristics, data availability, and even crash mechanism. Therefore, this study aims to deeply evaluate the real-time crash risk on arterials from multiple aspects by integrating all kinds of available data sources. First, Bayesian conditional logistic models (BCL) were developed to examine the relationship between crash occurrence on arterial segments and real-time traffic and signal timing characteristics by incorporating the Bluetooth, adaptive signal control, and weather data, which were extracted from four urban arterials in Central Florida. Second, real-time intersection-approach-level crash risk was investigated by considering the effects of real-time traffic, signal timing, and weather characteristics based on 23 signalized intersections in Orange County. Third, a deep learning algorithm for real-time crash risk prediction at signalized intersections was proposed based on Long Short-Term Memory (LSTM) and Synthetic Minority Over-Sampling Technique (SMOTE). Moreover, in-depth cycle-level real-time crash risk at signalized intersections was explored based on high-resolution event-based data (i.e., Automated Traffic Signal Performance Measures (ATSPM)). All the possible real-time cycle-level factors were considered, including traffic volume, signal timing, headway and occupancy, traffic variation between upstream and downstream detectors, shockwave characteristics, and weather conditions. Above all, comprehensive real-time safety evaluation algorithms were developed for arterials, which would be key components for future real-time safety applications (e.g., real-time crash risk prediction and visualization system) in the context of pro-active traffic management.
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Date Issued: 2019
Identifier: CFE0007743, ucf:52398
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007743

Title: Reconciling Ex Ante Expectations with the Ex Post Reality: A Look at the Effectiveness of Third-Party Diplomatic Interventions in Civil Wars.
Creator: Benchimol, Matthew, Handberg, Roger, Kinsey, Barbara, Mousseau, Michael, University of Central Florida
Abstract / Description: Research has begun to focus on the role third-party diplomatic intervention plays in the length of civil conflicts. Diplomatic interventions by a third-party actor are assumed to help resolve or alleviate violence over time. Is this really the case? Hypotheses relating to these aspects of civil wars are proposed to test this long-standing assumption. This thesis uses statistical analysis to observe the relationship between diplomatic interventions and civil war duration and then observe the...
Show moreResearch has begun to focus on the role third-party diplomatic intervention plays in the length of civil conflicts. Diplomatic interventions by a third-party actor are assumed to help resolve or alleviate violence over time. Is this really the case? Hypotheses relating to these aspects of civil wars are proposed to test this long-standing assumption. This thesis uses statistical analysis to observe the relationship between diplomatic interventions and civil war duration and then observe the relationship between duration and civil war violence. The data incorporates approximately 150 civil wars from 1945 to 1999, 101 of which had outside interventions. This thesis finds that, contrary to ex ante expectations, diplomatic interventions are a significant contributing factor to civil war length. Furthermore, longer civil wars are not associated with more civil war intensity in the aggregate, suggesting that longer civil wars do not mean more violent or intense ones.
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Date Issued: 2015
Identifier: CFE0005578, ucf:50253
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0005578

Title: High performance liquid crystal devices for augmented reality and virtual reality.
Creator: Talukder, Md Javed Rouf, Wu, Shintson, Moharam, Jim, Amezcua Correa, Rodrigo, Dong, Yajie, University of Central Florida
Abstract / Description: See-through augmented reality and virtual reality displays are emerging due to their widespread applications in education, engineering design, medical, retail, transportation, automotive, aerospace, gaming, and entertainment. For augmented reality and virtual reality displays, high-resolution density, high luminance, fast response time and high ambient contrast ratio are critically needed. High-resolution density helps eliminate the screen-door effect, high luminance and fast response time...
Show moreSee-through augmented reality and virtual reality displays are emerging due to their widespread applications in education, engineering design, medical, retail, transportation, automotive, aerospace, gaming, and entertainment. For augmented reality and virtual reality displays, high-resolution density, high luminance, fast response time and high ambient contrast ratio are critically needed. High-resolution density helps eliminate the screen-door effect, high luminance and fast response time enable low duty ratio operation, which plays a key role for suppressing image blurs. A dimmer placed in front of AR display helps to control the incident background light, which in turn improves the image contrast. In this dissertation, we have focused three crucial display metrics: high luminance, fast motion picture response time (MPRT) and high ambient contrast ratio.We report a fringe-field switching liquid crystal display, abbreviated as d-FFS LCD, by using a low viscosity material and new diamond-shape electrode configuration. Our proposed device shows high transmittance, fast motion picture response time, low operation voltage, wide viewing angle, and indistinguishable color shift and gamma shift. We also investigate the rubbing angle effects on transmittance and response time. When rubbing angle is 0 degree, the virtual wall effect is strong, resulting in fast response time but compromised transmittance. When rubbing angle is greater than 1.2 degree, the virtual walls disappear, as a result, the transmittance increases dramatically, but the tradeoff is in slower response time. We also demonstrate a photo-responsive guest-host liquid crystal (LC) dimmer to enhance the ambient contrast ratio in augmented reality displays. The LC composition consists of photo-stable chiral agent, photosensitive azobenzene, and dichroic dye in a nematic host with negative dielectric anisotropy. In this device, transmittance changes from bright state to dark state by exposing a low intensity UV or blue light. Reversal process can be carried out by red light or thermal effect. Such a polarizer-free photo-activated dimmer can also be used for wide range of applications, such as diffractive photonic devices, portable information system, vehicular head-up displays, and smart window for energy saving purpose. A dual-stimuli polarizer-free dye-doped liquid crystal (LC) device is demonstrated as a dimmer. Upon UV/blue light exposure, the LC directors and dye molecules turn from initially vertical alignment (high transmittance state) to twisted fingerprint structure (low transmittance state). The reversal process is accelerated by combining a longitudinal electric field to unwind the LC directors from twisted fingerprint to homeotropic state, and a red light to transform the cis azobenzene back to trans. Such an electric-field-assisted reversal time can be reduced from ~10s to a few milliseconds, depending on the applied voltage. Considering power consumption, low manufacturing cost, and large fabrication tolerance, this device can be used as a smart dimmer to enhance the ambient contrast ratio for augmented reality displays.
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Date Issued: 2019
Identifier: CFE0007731, ucf:52425
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007731

Title: PHILIPPINE ECONOMIC AND POLITICAL DEVELOPMENT AND PHILIPPINE MUSLIM UNREST.
Creator: de Leon, Justin, Sadri, Houman, University of Central Florida
Abstract / Description: Muslim culture and society has been a part of the Philippine islands in spite of nearly ninety-five percent of the population being Christian (a majority Catholic), yet did not become a separatist movement until the 1970's. Since then, the two main separatist groups the Moro National Liberation Front (MNLF) and the Moro Islamic Liberation Front (MILF) have been battling the Philippine government. The parties entered truces in 1996 and 2001, yet there has been a cycle of violence continues...
Show moreMuslim culture and society has been a part of the Philippine islands in spite of nearly ninety-five percent of the population being Christian (a majority Catholic), yet did not become a separatist movement until the 1970's. Since then, the two main separatist groups the Moro National Liberation Front (MNLF) and the Moro Islamic Liberation Front (MILF) have been battling the Philippine government. The parties entered truces in 1996 and 2001, yet there has been a cycle of violence continues. The Abu Sayyaf Group (ASG), linked to Al Qaeda, emerged in 1990 and has launched many attacks on the Christian Philippine majority. The prolonged Muslim unrest in the ARMM has left thousands dead and hundreds of thousands displaced. The main objective of this research paper is to examine Philippine economic and political development and its impact on Philippine Muslim unrest. This paper presents a critical analysis of the economic and political development and Philippine Muslim unrest by examining six major features of the Philippines; they are: The historical evolution, economic development, political development, socio-cultural setting, geographic setting, and the quality of life of the Filipino people. This research also examines Fareed Zakaria's illiberal democracies theory, liberal institutionalism, and the Marxist theory of class revolution and primarily relies on research conducted at the University of the Philippines and from Philippine and Asian scholars. By taking a holistic comprehensive approach and by using international relations theory, this research fills two gaps in the literature about Philippine Muslim unrest. The research concludes with a look at future challenges, both short term and long term that face the country, as well as, possible future scenarios. The findings of this research are that the economic and political development and the historical evolution, though major contributory factors, are not the sole reason for the prolonged Philippine Muslim unrest. The most pervasive causal factor to Muslim unrest was the socio-cultural setting. Because of the all-pervasive nature of culture; at first glance, the socio-cultural setting was not a major apparent cause. At almost all times examined throughout this research, certain cultural tendencies guided decisions and altered the course of events more so than any other single variable. Corruption, crony capitalism, patrimonialism, and irrational institutions all stem from the tendencies of Philippine culture must be addressed to find lasting peace in the country. A move toward rational legal institutions and liberal constitutionalism, will lead the way to the creation of a liberal democracy and break the cycle of violence occurring in the Philippines.
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Date Issued: 2008
Identifier: CFE0002378, ucf:47812
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002378

Conflict Resolution (2)	+ -
Resolution (2)	+ -
3D model (1)	+ -
ARMM (1)	+ -
Abu Sayyaf (1)	+ -

Adaptive signal control data (1)	+ -
Alternative Dispute Resolution (1)	+ -
Anisotropic (1)	+ -
Arterial safety (1)	+ -
Asia (1)	+ -
Augmented reality (1)	+ -
Autonomous Region of Muslim Mindinao (1)	+ -
Azobenzene (1)	+ -
Bargaining (1)	+ -
Bluetooth data (1)	+ -
Body Fluid Identification (1)	+ -
Brain Atlas (1)	+ -
Brain Tumor (1)	+ -
COLLECTIVE BARGAINING (1)	+ -
CONTRACT NEGOTIATION (1)	+ -
Chiral agent (1)	+ -
Civil War (1)	+ -
Civil War Violence (1)	+ -
Civil Wars (1)	+ -
Conflict (1)	+ -
Conflict Management (1)	+ -
DISPUTE RESOLUTION (1)	+ -
DNA extraction (1)	+ -
DNA profiling (1)	+ -
Decision Theory (1)	+ -

University of Central Florida (18)	+ -
Rolland, Jannick (2)	+ -
Abdel-Aty, Mohamed (1)	+ -
Amezcua Correa, Rodrigo (1)	+ -
Atalay, Vildan (1)	+ -

Bagci, Ulas (1)	+ -
Ballantyne, John (1)	+ -
Baudelet, Matthieu (1)	+ -
Benchimol, Matthew (1)	+ -
Blackwell, Christopher (1)	+ -
Bula, Oleh (1)	+ -
Cai, Qing (1)	+ -
Chaoulov, Vesselin (1)	+ -
Collins, Mary (1)	+ -
Da Vitoria Lobo, Niels (1)	+ -
Decker, Jonathan (1)	+ -
Del Barco, Enrique (1)	+ -
Deshpande, Rohit (1)	+ -
Dong, Yajie (1)	+ -
Elshennawy, Ahmad (1)	+ -
Eluru, Naveen (1)	+ -
Foroosh, Hassan (1)	+ -
Gerasimova, Yulia (1)	+ -
Handberg, Roger (1)	+ -
Hasan, Samiul (1)	+ -
Hilal, Iman (1)	+ -
Hughes, Charles (1)	+ -
Jiang, James (1)	+ -
Kasparis, Takis (1)	+ -
Kim, Jaeho (1)	+ -

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