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2007

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Numerical Modeling Of A Gravity Wave Packet Ducted By The Thermal Structure Of The Atmosphere, Yonghui Yu, Michael P. Hickey Jan 2007

Numerical Modeling Of A Gravity Wave Packet Ducted By The Thermal Structure Of The Atmosphere, Yonghui Yu, Michael P. Hickey

Faculty Bibliography 2000s

[1] A time-dependent and fully nonlinear numerical model is employed to solve the Navier-Stokes equations in two spatial dimensions and to describe the propagation of a Gaussian gravity wave packet generated in the troposphere. A Fourier spectral analysis is used to analyze the frequency power spectra of the wave packet, which propagates through and dwells within several thermal ducting regions. The frequency power spectra of the wave packet are derived at several discrete altitudes, which allow us to determine the evolution of the packet. This spectral analysis also clearly reveals the existence of a stratospheric duct, a mesospheric and lower …

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Free Energy Of Dna Duplex Formation On Short Oligonucleotide Microarrays, Li Zhang, Chunlei Wu, Roberto Carta, Haitao Zhao Jan 2007

Free Energy Of Dna Duplex Formation On Short Oligonucleotide Microarrays, Li Zhang, Chunlei Wu, Roberto Carta, Haitao Zhao

Faculty Bibliography 2000s

DNA/DNA duplex formation is the basic mechanism that is used in genome tiling arrays and SNP arrays manufactured by Affymetrix. However, detailed knowledge of the physical process is still lacking. In this study, we show a free energy analysis of DNA/DNA duplex formation these arrays based on the positional-dependent nearest-neighbor (PDNN) model, which was developed previously for describing DNA/RNA duplex formation on expression microarrays. Our results showed that the two ends of a probe contribute less to the stability of the duplexes and that there is a microarray surface effect on binding affinities. We also showed that free energy cost …

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Gap-Based Estimation: Choosing The Smoothing Parameters For Probabilistic And General Regression Neural Networks, Mingyu Zhong, Dave Coggeshall, Ehsan Ghaneie, Thomas Pope, Mark Rivera, Michael Georgiopoulos, Georgios C. Anagnostopoulos, Mansooreh Mollaghasemi, Samuel Richie Jan 2007

Gap-Based Estimation: Choosing The Smoothing Parameters For Probabilistic And General Regression Neural Networks, Mingyu Zhong, Dave Coggeshall, Ehsan Ghaneie, Thomas Pope, Mark Rivera, Michael Georgiopoulos, Georgios C. Anagnostopoulos, Mansooreh Mollaghasemi, Samuel Richie

Faculty Bibliography 2000s

Probabilistic neural networks (PNN) and general regression neural networks (GRNN) represent knowledge by simple but interpretable models that approximate the optimal classifier or predictor in the sense of expected value of the accuracy. These models require the specification of an important smoothing parameter, which is usually chosen by crossvalidation or clustering. In this letter, we demonstrate the problems with the cross-validation and clustering approaches to specify the smoothing parameter, discuss the relationship between this parameter and some of the data statistics, and attempt to develop a fast approach to determine the optimal value of this parameter. Finally, through experimentation, we …

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Detection Of Coastal Region Sea Ice Decay From Orthorectified Radarsat-1 Scansar Imagery: A Case Study Of Bering Strait And Norton Sound, Alaska, X. Zhou, N. B. Chang, S. Li Jan 2007

Detection Of Coastal Region Sea Ice Decay From Orthorectified Radarsat-1 Scansar Imagery: A Case Study Of Bering Strait And Norton Sound, Alaska, X. Zhou, N. B. Chang, S. Li

Faculty Bibliography 2000s

Application of SAR images to detect the onset of breakup and dynamic decay process of coastal sea ice was investigated, using a time series of RADARSAT-1 C-band scanning SAR images of the areas around Seward Peninsula coastal region, Alaska, including Bering Strait and Norton Sound. Satellite image analyses mainly include a time series feature space images composed of radar backscattering coefficient versus look angle derived from RADARSAT-1 amplitude images covering both coastal sea and land area. It was found that the feature space images have a single mode before the decay and breakup of the coastal sea ice, and have …

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Enhanced Laser Emission In Opposite Handedness Using A Cholesteric Polymer Film Stack, Ying Zhou, E-Eun Amy Jang, Yuhua Huang, Shin-Tson Wu Jan 2007

Enhanced Laser Emission In Opposite Handedness Using A Cholesteric Polymer Film Stack, Ying Zhou, E-Eun Amy Jang, Yuhua Huang, Shin-Tson Wu

Faculty Bibliography 2000s

We demonstrate an enhanced circularly polarized laser emission whose handedness is opposite to the cholesteric helix by the stacked cholesteric polymeric films. The dye-doped right-handed cholesteric polymer film is sandwiched between a mirror and a cholesteric polymer reflector. Due to the stimulated amplification and light recycling effects, the original laser emission from the middle active layer is not only dramatically enhanced but also converted to a left-handed circularly polarized emission with high purity. Moreover, a single 15 mu m dye-doped cholesteric film is found to lase more efficiently when the top side faces the pump source than when the bottom …

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Stable Dual-Wavelength Operation Of Ingaas Diode Lasers With Volume Bragg Gratings, S. A. Zolotovskayaa, N. Daghestani, G. B. Venus, L. B. Glebov, V. I. Smirnov, E. U. Rafailov Jan 2007

Stable Dual-Wavelength Operation Of Ingaas Diode Lasers With Volume Bragg Gratings, S. A. Zolotovskayaa, N. Daghestani, G. B. Venus, L. B. Glebov, V. I. Smirnov, E. U. Rafailov

Faculty Bibliography 2000s

Stable dual-wavelength operation of InGaAs diode lasers coupled with volume Bragg gratings has been demonstrated for the continuous wave and gain-switching regimes. Spectral narrowing down to 0.33 nm has been realized with maximum output power of up to 1.85 W from a broad area stripe laser diode in a single-grating external cavity configuration. Spectral separation from 0.5 (0.16 THz) to 6.5 nm (2.05 THz) has been obtained and an output power of up to 1.75 W was achieved in dual-wavelength operation. (C) 2007 American Institute of Physics.

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Washback From Language Tests On Teaching, Learning And Policy: Evidence From Diverse Settings, Pauline Rea-Dickins, Catriona Scott Jan 2007

Washback From Language Tests On Teaching, Learning And Policy: Evidence From Diverse Settings, Pauline Rea-Dickins, Catriona Scott

Institute for Educational Development, East Africa

No abstract provided.

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Characteristics Of Academic Writing In Education, Andrew Kemp Jan 2007

Characteristics Of Academic Writing In Education, Andrew Kemp

Electronic Theses and Dissertations

According to Stangl (1994), Jalongo (2002), Richards and Miller (2005) and a host of other authors regarding publishing in educational journals, understanding the audience for an article is of utmost importance. Huff (1999) notes that an author must understand the audience for whom s/he writes. While much of this understanding of audience comes down to suitable topics (Silverman, 1982), articles must also fit the style of the journal to which it is being presented (Olsen, 1997). With this in mind, the purpose of this study is to characterize the writing style of academic writing in education. This research will involve …

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Does Choice Matter? The Impact Of Allowing Proteges To Select Their Own Mentors, Dana Kendall Jan 2007

Does Choice Matter? The Impact Of Allowing Proteges To Select Their Own Mentors, Dana Kendall

Electronic Theses and Dissertations

Many organizations currently implement formal mentoring programs to assist newcomers in their adjustment to organizational norms, standards, and culture. However, very few empirically-established guidelines exist for how to effectively match mentors to proteges in formal programs sponsored by organizations. Typically, organizations attempt to match mentors to proteges based on similarity of goals/interests. However, prior research suggests that even mentors and proteges disagree with respect to their perceived similarity. Consequently, it should be difficult for a program administrator to determine which mentors and proteges are likely to be compatible. Recent research has found that proteges who perceived they had input into …

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Proposing An Alternative Framework For Feasibility Studies For Large Public Tourism Investments: A Quantitative Analysis Of The, Marcelinio Kock Jan 2007

Proposing An Alternative Framework For Feasibility Studies For Large Public Tourism Investments: A Quantitative Analysis Of The, Marcelinio Kock

Electronic Theses and Dissertations

Numerous studies in the hospitality field have focused on the importance of the convention industry to the economic well being of the local tourism industry. Because of intense competition between convention centers, destinations are practicing strategies of expanding their convention facilities and related infrastructure. Unfortunately, many of these expansions appear to have been based on feasibility studies that failed to present rigorous reviews and examinations regarding alleged claims of positive impacts and over-optimistic operational pro-forma statements. The main objective of this study is to propose an alternative framework for feasibility studies, which consists of an updated, rigorous methodology to calculate …

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Mentoring Expatriate Employees: The Influence Of Multiple Mentors On Overseas Experiences, Lisa Littrell Jan 2007

Mentoring Expatriate Employees: The Influence Of Multiple Mentors On Overseas Experiences, Lisa Littrell

Electronic Theses and Dissertations

Sending employees overseas for international work assignments has become a popular practice among today's multinational corporations, albeit one fraught with challenges. These expatriate employees, individuals who relocate internationally for work assignments, face many difficulties ranging from problematic adjustment to inadequate preparation. Mentoring has been proposed as one strategy for alleviating the challenges faced by expatriates and for providing the support expatriates need before, during, and after their assignments (Harvey & Wiese, 2002; Mezias & Scandura, 2005). In fact, expatriates that report having a mentor are more likely than expatriates without mentors to have positive career outcomes such as increased job …

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Perceptions Of Student Organizations On Campus, Rachael Lunt Jan 2007

Perceptions Of Student Organizations On Campus, Rachael Lunt

Electronic Theses and Dissertations

This two part study investigated whether perceptions of student organizations are related to participants' ethnicity as well as the ethnicity of the ethnic student organization. Study 1 (N = 460) assessed overall attitudes toward ethnic student organizations dependent upon ethnicity of the participants. Study 2 (N = 631) assessed how attitudes toward ethnic student organizations were affected not only by race of the participant but also by ethnicity of the student organization. Results of Study 1 indicate that overall White students found the ethnic student organizations least beneficial/necessary, most racist, and had the least interest in joining as compared to …

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Recognizing Teamwork Activity In Observations Of Embodied Agents, Linus Jan Luotsinen Jan 2007

Recognizing Teamwork Activity In Observations Of Embodied Agents, Linus Jan Luotsinen

Electronic Theses and Dissertations

This thesis presents contributions to the theory and practice of team activity recognition. A particular focus of our work was to improve our ability to collect and label representative samples, thus making the team activity recognition more efficient. A second focus of our work is improving the robustness of the recognition process in the presence of noisy and distorted data. The main contributions of this thesis are as follows: We developed a software tool, the Teamwork Scenario Editor (TSE), for the acquisition, segmentation and labeling of teamwork data. Using the TSE we acquired a corpus of labeled team actions both …

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Organizational Justice And Workplace Deviance: The Role Of Organizational Structure, Powerlessness, And Information Salience, Jie Guo Mccardle Jan 2007

Organizational Justice And Workplace Deviance: The Role Of Organizational Structure, Powerlessness, And Information Salience, Jie Guo Mccardle

Electronic Theses and Dissertations

The purpose of this study is to investigate both individual and structural factors in predicting workplace deviance. Deviant workplace behavior is a prevailing and costly phenomenon in organizations. It includes a wide range of negative acts conducted by employees to harm the organization and its members. In the first section, I conducted a comprehensive literature review. In the review, I first review the current state of research on the relationship between organizational justice and workplace deviance by presenting the various theoretical frameworks, as well as empirical findings. Next, I summarize existing research patterns and identify research challenges that must be …

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Micro-Optic-Spectral-Spatial-Elements (Mosse), Alok Ajay Mehta Jan 2007

Micro-Optic-Spectral-Spatial-Elements (Mosse), Alok Ajay Mehta

Electronic Theses and Dissertations

Over a wide range of applications, optical systems have utilized conventional optics in order to provide the ability to engineer the properties of incident infra-red fields in terms of the transmitted field spectral, spatial, amplitude, phase, and polarization characteristics. These micro/nano-optical elements that provide specific optical functionality can be categorized into subcategories of refractive, diffractive, multi-layer thin film dichroics, 3-D photonic crystals, and polarization gratings. The feasibility of fabrication, functionality, and level of integration which these elements can be used in an optical system differentiate which elements are more compatible with certain systems than others. With enabling technologies emerging allowing …

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Stress, Fatigue And Workload: Determining The Combined Affect On Human Performance, Jessica Mock-Mclaughlin Jan 2007

Stress, Fatigue And Workload: Determining The Combined Affect On Human Performance, Jessica Mock-Mclaughlin

Electronic Theses and Dissertations

This research generated a model that will help to predict, prevent, control and mitigate the occurrence of task related factors that negatively influence stress, fatigue, and workload; thus enhancing human performance. Past research efforts involving stress, fatigue and workload identified factors that influence a change in performance (Lan, Ji and Looney, 2003, and Hancock & Warm, 1989). Also, while some mathematical models have been developed within each respective area, however, there is no evidence of an integrated model describing the combined affect of stress, fatigue and workload. To respond to this research gap, a quantitative model representing the state of …

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The Role Of Cultural Values In Organizational Attraction., Elizabeth Jimenez Muniz Jan 2007

The Role Of Cultural Values In Organizational Attraction., Elizabeth Jimenez Muniz

Electronic Theses and Dissertations

The United States' (U.S.) workforce is more diverse than in previous decades in terms of race, gender, and native language (Fay, 2001). Such demographic shifts have changed how organizations attract applicants and how they motivate, reward, and retain employees (McAdams, 2001). Furthermore, organizations benefit from diversity by: (a) attracting the best talent available in the workforce (Cox, 1993), (b) increasing their product marketability to customers (Deshpande, Hoyer, & Donthu, 1986; Redding, 1982), and (c) fostering creativity, innovation, problem solving, and decision making in employees (Thomas, 1999; Thomas, Ravlin, & Wallace, 1996; Watson, Kumar, & Michaelsen, 1993). Given such benefits, organizations …

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Human Sexuality Education In The Middle Grades Classroom: A Review Of Curricula In A Sample Of Florida School Districts, Melinda Myrick Jan 2007

Human Sexuality Education In The Middle Grades Classroom: A Review Of Curricula In A Sample Of Florida School Districts, Melinda Myrick

Electronic Theses and Dissertations

This study examined the extent to which human sexuality topics are covered in Florida middle school science classrooms and the process by which curricular decisions are made regarding human sexuality education on a county-wide basis. Primary data included interviews with county-level administrators who oversee curricular decisions related to the middle-grades science curriculum or health curriculum in twelve school districts within the state. These districts represented four geographic locations and districts of various sizes. Administrators from four of the twelve studies in the sample chose to provide information regarding their human sexuality education curriculum. In two cases, teacher leads were identified …

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Examining Sociomathematical Norms Within The Context Of Decimals And Fractions In A Sixth Grade Classroom, Marino Nardelli Jan 2007

Examining Sociomathematical Norms Within The Context Of Decimals And Fractions In A Sixth Grade Classroom, Marino Nardelli

Electronic Theses and Dissertations

Social norms are patterns of behavior expected within a particular society in a given situation. Social norms can be shared belief of what is normal and acceptable shapes and enforces the actions of people in a society. In the educational classroom, they are characteristics that constitute the classroom participation structure. Sociomathematical norms are fine-grained aspects of general social norms specifically related to mathematical practices. These can include, but are not limited to, a student-centered classroom that includes the expectation that the students should present their solution methods by describing actions on mathematical objects rather than simply accounting for calculational manipulations. …

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A Novel Setup For High-Pressure Raman Spectroscopy Under A Microscope, Thomas Andrew Oakeson Jan 2007

A Novel Setup For High-Pressure Raman Spectroscopy Under A Microscope, Thomas Andrew Oakeson

Electronic Theses and Dissertations

Functional properties of biological molecules and cells are affected by environmental parameters such as temperature and pressure. While Raman spectroscopy provides an intrinsic probe of molecular structural changes, the incorporation of a microscope enables studies of minuscule amounts of biological compounds with spatial resolution on a micron scale. We have developed a novel setup which combines a Raman microscope and a high pressure cell. A micro-capillary made out of fused silica simultaneously serves as the supporting body and the optical window of the pressure cell. The cell has been tested over the pressure range from 0.1 to 4 kbar. Raman …

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The Relationship Between Master's Level Counseling Practicum Students' Wellness And Client Outcomes, Elizabeth O'Brien Jan 2007

The Relationship Between Master's Level Counseling Practicum Students' Wellness And Client Outcomes, Elizabeth O'Brien

Electronic Theses and Dissertations

Client outcome research focuses primarily on three specific aspects of therapy: therapist technique, client behaviors and therapeutic interaction. The term "therapeutic interaction" focuses on the relationship between the counselor and the client, and is often ignored in client outcome research. Counselor specific contributions to the therapeutic process are called therapist characteristics may be an innovative way to assess how counselors' impact clients' outcomes in counseling. For the purposes of this study administering the Five Factor Wellness Evaluation of Lifestyle and the Outcome Questionnaire to master's level student counselors assessed therapist characteristics. The Outcome Questionnaire was administered to clients at a …

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Cooperative Education As A Predictor Of Baccalaureate Degree Completion, Amanda Celeste Pacheco Jan 2007

Cooperative Education As A Predictor Of Baccalaureate Degree Completion, Amanda Celeste Pacheco

Electronic Theses and Dissertations

Baccalaureate degree completion statistics are surprisingly low. National four-year graduation rates hover around 38%, and six-year graduation rates have remained steady at approximately 63% (Berkner, He, & Cataldi, 2002). At the University of Central Florida, as at many public research institutions, the numbers are even lower. Literature has emerged, however, which suggests that students who participate in cooperative education programs may experience increased motivation to continue the formal education process (Avenoso & Totoro, 1994; Schambach & Dirks, 2002; Somers, 1986). This study investigated the effect of co-op participation on undergraduate degree completion in the context of several risk factors for …

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An Analysis Of Improving Student Performance Through The Use Of Registered Therapy Dogs Serving As Motivators For Reluctant Read, Julie Paradise Jan 2007

An Analysis Of Improving Student Performance Through The Use Of Registered Therapy Dogs Serving As Motivators For Reluctant Read, Julie Paradise

Electronic Theses and Dissertations

This investigation studied the impact of registered therapy dogs assigned to students in order to improve reading skills. The purpose of this study was to determine if children assigned to registered therapy dogs improve significantly in reading achievement and related school performance such as attendance and discipline when compared to students of similar characteristics not assigned to registered therapy dogs. Specifically, the study used data to ascertain whether students assigned to registered therapy dogs improved their reading skills and if these students demonstrated more or less growth than students of similar characteristics not assigned to registered therapy dogs. This study …

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Impulse Formulations Of The Euler Equations For Incompressible And Compressible Fluids, Victor David Pareja Jan 2007

Impulse Formulations Of The Euler Equations For Incompressible And Compressible Fluids, Victor David Pareja

Electronic Theses and Dissertations

The purpose of this paper is to consider the impulse formulations of the Euler equations for incompressible and compressible fluids. Different gauges are considered. In particular, the Kuz'min gauge provides an interesting case as it allows the fluid impulse velocity to describe the evolution of material surface elements. This result affords interesting physical interpretations of the Kuz'min invariant. Some exact solutions in the impulse formulation are studied. Finally, generalizations to compressible fluids are considered as an extension of these results. The arrangement of the paper is as follows: in the first chapter we will give a brief explanation on the …

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Analysis Of Mitochondrial Dna Coding Region Snps By Pyrosequencing, Kyle Robert Carl Parker Jan 2007

Analysis Of Mitochondrial Dna Coding Region Snps By Pyrosequencing, Kyle Robert Carl Parker

Electronic Theses and Dissertations

To date, the use of mitochondrial DNA in forensic analysis has relied on the presence of variations in the control region to differentiate between samples. One problem that this analysis has shown is the occurrence of common Haplogroup H haplotypes or identical sequences. Thus, there is a need to enhance the distinguishing power of this type of analysis. One option has been to investigate the mitochondrial coding region for polymorphisms that could differentiate between samples with identical control region haplotypes. The goal of this study has been to identify polymorphic coding region sites for development in a Pyrosequencing assay that …

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The Relationship Between Mentoring And Elementary Beginning Teachers' Intent To Stay In The Teaching Field, Deborah Partridge Jan 2007

The Relationship Between Mentoring And Elementary Beginning Teachers' Intent To Stay In The Teaching Field, Deborah Partridge

Electronic Theses and Dissertations

The purpose of this survey research study was to determine if a relationship existed between mentoring for beginning elementary teachers and teachers' intent to stay in the teaching field. The key attribute analyzed was the significance of having or not having a mentor. Teachers' perceptions regarding mentoring were analyzed and teacher opinions of the most important elements of a mentoring program were discussed. Results indicated there was not a statistical significance between mentoring and teachers' intent to stay in the teaching field. The qualitative portion of the survey revealed that beginning teachers felt availability, accessibility, and receptivity of the mentor …

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The Effect Of An Inquiry-Based Science Curriculum On Student Attitudes And Participation, James Perlmutter Jan 2007

The Effect Of An Inquiry-Based Science Curriculum On Student Attitudes And Participation, James Perlmutter

Electronic Theses and Dissertations

This study was designed as a collaborative action research study and focused on the use of an inquiry-based unit in an eighth grade honors science class at a middle school with a diverse population in the southeastern portion of the United States in the Spring of 2005. The inquiry-based unit was taught through the use of the electronics unit in Full Option Science System (FOSS). The purpose of the study was to investigate the effects of an inquiry based curriculum on the level of participation in, attitudes of, and academic performance of students towards science. This collaborative action research study …

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The Public Spectacle Of Italian Masculinity: Nonverbal Display Of Gender Identity, Gino Perrotte Jan 2007

The Public Spectacle Of Italian Masculinity: Nonverbal Display Of Gender Identity, Gino Perrotte

Electronic Theses and Dissertations

Italian masculine identity is examined by looking at the following influences: history and structure of Italian society, the public places used for the performance and the culture surrounding the display of masculinity. This research uses an approach similar to an ethnography of communication. Initial data and ideas were gathered through observational fieldwork and interviews that took take place in Italy during July 2006 and July 2007. A methods section describes interviews that later took place with Americans in order to compare and contrast responses with ones previously collected from Italians. The data gathered from these interviews will be used to …

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Journey To The Scars: A White Trash Epic, J. Patrick Rader Jan 2007

Journey To The Scars: A White Trash Epic, J. Patrick Rader

Electronic Theses and Dissertations

Inspired by the work of writers Hunter S. Thompson and Tom Wolfe and motivated by celebrity prevaricator James Frey, Journey to the Scars: A White Trash Epic is a memoir that attempts to redefine the genre by applying the ideals and themes of gonzo and new journalism. The opening chapter, "The Diary of John Doe Frankenstein" tells the story of a pivotal event in the author's life. Immediately following this narrative of a near fatal motorcycle accident, the author/narrator's reliability is called into question and the remainder of the memoir is the story of the author's efforts to uncover the …

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Effects Of Polarization And Coherence On The Propagation And The Detection Of Stochastic Electromagnetic Beams, Mohamed Fouad Salem Jan 2007

Effects Of Polarization And Coherence On The Propagation And The Detection Of Stochastic Electromagnetic Beams, Mohamed Fouad Salem

Electronic Theses and Dissertations

Most of the physically realizable optical sources are radiating in a random manner given the random nature of the radiation of a large number of atoms that constitute the source. Besides, a lot of natural and synthetic materials are fluctuating randomly. Hence, the optical fields that one encounters, in most of the applications are fluctuating and must be treated using random or stochastic functions. Within the framework of the scalar-coherence theory, one can describe changes of the properties of any stochastic field such as the spectral density and the spectral degree of coherence on propagation in any linear medium, deterministic …

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