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2014

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Exploring Warped Compactifications Of Extra Dimensions, Sujan P. Dabholkar Dec 2014

Exploring Warped Compactifications Of Extra Dimensions, Sujan P. Dabholkar

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

In 1920s, the concept of extra dimensions was considered for the first time to unify gravity and electromagnetism. Since then there have been many developments to understand the unification of fundamental forces using extra dimensions. In this thesis, we study this idea of extra dimensions in higher dimensional gravity theories such as String Theory or Supergravity to make connections with cosmology. We construct a family of non-singular time-dependent solutions of a six-dimensional gravity with a warped geometry. The warp factor is time-dependent and breaks the translation invariance along one of the extra directions. Our solutions have the desired property of …

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Observation Of $\Nu_E$ Appearance From An Off-Axis $\Nu_{\Mu}$ Beam Utilizing The Neutrino Energy Spectrum, Joshua Michael Hignight Dec 2014

Observation Of $\Nu_E$ Appearance From An Off-Axis $\Nu_{\Mu}$ Beam Utilizing The Neutrino Energy Spectrum, Joshua Michael Hignight

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

T2K (Tokai to Kamiokande) is a long baseline neutrino experiment located in Japan. It uses a 30 GeV proton beam at the J-PARC accelerator in Tokai to produce an intense off-axis muon neutrino beam that travels 295 km through the Earth to Super-Kamiokande. One of its primary goals is to measure neutrino oscillation parameters by directly detecting $\nu_e$ at Super-Kamiokande that have oscillated from the $\nu_{\mu}$ beam. The measurement of $\nu_{\mu} \rightarrow \nu_{e}$ oscillations are of a particular interest because this mode is sensitive to both mixing angle $\theta_{13}$ and CP phase $\delta_{CP}$ of the PMNS matrix. Precise measurement of …

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The Case Of Extended Supersymmetry And A Study In Superspace, Dharmesh Jain Dec 2014

The Case Of Extended Supersymmetry And A Study In Superspace, Dharmesh Jain

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

In this dissertation we study quantum field theories with extended supersymmetry in four and three dimensions. In d=4 we study N=2 supersymmetric theories using projective superspace formalism extensively. We discover the full non-Abelian action for super Yang-Mills (SYM) theory in projective superspace by studying its relation to harmonic superspace under a suitable Wick rotation of the latter's internal two-dimensional sphere. We also show that a Chern-Simons action for SYM in ‘ full‘ N=2 superspace can be written down that reproduces both the harmonic and projective SYM actions. The projective formalism allows simplifications in computing Feynman supergraphs because the N=2 rules …

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Aspects Of Perturbative Quantum Field Theory, Stanislav Srednyak Dec 2014

Aspects Of Perturbative Quantum Field Theory, Stanislav Srednyak

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This thesis consists of three parts. The first is devoted to the calculation of multiplicity of two-gluon production in heavy ion collisions in the framework of Colour Glass Condensate. The second exhibits a finite basis for the perturbative correlation functions at a given loop order. The third demonstrates that the number of integrations in a perturbative amplitude can be reduced in half in even dimensions, and provides explicit formula for such a reduction in the (2,2) signature. | 79 pages

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Attachment's Role In Social Support And Mentoring: An Investigation Among Collegiate Women, Alberto Herrera-Alcazar Dec 2014

Attachment's Role In Social Support And Mentoring: An Investigation Among Collegiate Women, Alberto Herrera-Alcazar

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Recent years have seen a concerted effort to increase the number of women pursuing Science, Technology, Engineering and Mathematics (STEM) fields. Although one approach to retention of undergraduates in STEM fields has been formal mentoring programs, other channels, such as naturally occurring mentor relationships, have served to retain students in science and other disciplines as well. The current project investigated the interplay between attachment representations of close relationships, social support and mentor relationships. The first aim was to examine the relationship between attachment and general facets of social support. The second aim was to assess benefits of mentor relationships on …

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Upper And Lower Bounds On Sorting And Searching In External Memory, Dzejla Medjedovic Dec 2014

Upper And Lower Bounds On Sorting And Searching In External Memory, Dzejla Medjedovic

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This dissertation presents variants on sorting and searching in external memory. In the first part of the dissertation, we derive lower and upper bounds on sorting with different-sized records. We show that the record size substantially affects the sorting complexity, and so does the final interleaving of the smaller and larger records in the final sorted sequence: sorting costs more when large and small records are segregated than when they are interleaved in the final sorted order. In the second part of the dissertation, we study the batched predecessor problem in external memory. Given the underlying sorted set S of …

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Shape-Based Analysis, Krishna Chaitanya Gurijala Dec 2014

Shape-Based Analysis, Krishna Chaitanya Gurijala

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Shape analysis plays a critical role in many fields, especially in medical analysis. There has been substantial research performed for shape analysis in manifolds. On the contrary, shape-based analysis has not received much attention for volumetric data. It is not feasible to directly extend the successful manifold shape analysis methods, such as heat diffusion, to volumes due to the huge computational cost. The work presented herein seeks to address this problem by presenting two approaches for shape analysis in volumes that not only capture the shape information efficiently but also reduce the computational time drastically. The first approach is a …

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Visual Association Mining Of Multivariate Data, Zhiyuan Zhang Dec 2014

Visual Association Mining Of Multivariate Data, Zhiyuan Zhang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The rapid development of information technology produces vast amounts of data with numerous attributes. These multi-dimensional datasets offer tremendous opportunities for studying existing behavioral patterns and for predicting future developments. However, the high-dimensional space exceeds human comprehension. More sophisticated visualization techniques than the arsenal of standard plots are needed. First, we introduce an interactive navigation technique to help the analysts explore within the multi-dimensional data spaces. We employ a network-based interface and pair it with a parallel coordinates plot. In the network interface, the dimensions form nodes that are connected by edges representing the strength of association between dimensions. The …

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Examining Teacher Leadership Development In A Government Secondary School In Koboko West-Nile Uganda, Wayi Dragamulai Dec 2014

Examining Teacher Leadership Development In A Government Secondary School In Koboko West-Nile Uganda, Wayi Dragamulai

Master of Education

The ultimate resource of any community is its people and so are the teachers who are a beacon of hope for the future of a school. A case study of examining teacher leadership development in a government secondary school in Koboko District, West Nile Uganda was carried out. This study aimed at determining teacher leadership development opportunities in the school, the factors that enhance and the factors that hamper teacher leadership development in the school. Data collection involved the use of both primary and secondary methods with instruments such as, semi structured interviews, focused group discussion, and document analyses were …

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Lived Experiences Of Lower Secondary School Students In Learning Mathematics In English; A Phenomenological Study Of Ward Secondary Schools In Ukerewe District, Tanzania., Josephat Samwel Dec 2014

Lived Experiences Of Lower Secondary School Students In Learning Mathematics In English; A Phenomenological Study Of Ward Secondary Schools In Ukerewe District, Tanzania., Josephat Samwel

Master of Education

During this era of globalization where the world is like a village, preparation of competent, efficient and competitive graduates is inevitable. Language of instruction is highly regarded as an important factor in the learning process globally and Tanzania in particular. Language, without doubt, plays a pivotal role in facilitating the process of acquisition of knowledge, skills and values by the learners. This study explored the lived experiences of the lower secondary school students’ in learning mathematics in English in ward secondary school in Tanzania. The study used qualitative approach, whereby a phenomenological design was adopted. The study employed two methods …

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The Role Of The Head Teacher In Supporting Teachers To Enhance Language Competences Among The Learners Transiting From Lower To Upper Primary: A Case Of A Government Aided Primary School In Uganda, Sharon Kirabo Dec 2014

The Role Of The Head Teacher In Supporting Teachers To Enhance Language Competences Among The Learners Transiting From Lower To Upper Primary: A Case Of A Government Aided Primary School In Uganda, Sharon Kirabo

Master of Education

Transition from lower to upper primary is challenging both to teachers and learners, especially in a context where that transition involves switching from one language of instruction to another. As learners struggle to master the language of instruction and the subject content, teachers similarly struggle to find suitable methods that would enhance learners‟ understanding. This challenging situation requires massive support from the head teacher. This study sought to explore the role of the head teacher in supporting teachers to enhance language competences among the learners transiting from lower to upper primary. The study adopted a qualitative case study design and …

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Nippon Foundation / Gebco Indian Ocean Bathymetric Compilation Project, Rochelle A. Wigley, Norhizam Hassan, Mohammad Chowdhury, Roshan Ranaweera, Xinh Le Sy, Hemanaden Runghen, Jan Erik Arndt Dec 2014

Nippon Foundation / Gebco Indian Ocean Bathymetric Compilation Project, Rochelle A. Wigley, Norhizam Hassan, Mohammad Chowdhury, Roshan Ranaweera, Xinh Le Sy, Hemanaden Runghen, Jan Erik Arndt

Center for Coastal and Ocean Mapping

The Indian Ocean Bathymetric Compilation (IOBC) project, undertaken by Nippon Foundation / GEBCO Scholars, is focused on building a regional bathymetric data compilation, of all publically-available bathymetric data within the Indian Ocean region from 30°N to 60° S and 10° to 147° E. One of the objectives of this project is the creation of a network of Nippon Foundation / GEBCO Scholars working together, derived from the thirty Scholars from fourteen nations bordering on the Indian Ocean who have graduated from this Postgraduate Certificate in Ocean Bathymetry (PCOB) training program training program at the University of New Hampshire. The IOBC …

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Annie Humphers-Ginther Honors Portfolio, Anastasia June Humphers-Ginther Dec 2014

Annie Humphers-Ginther Honors Portfolio, Anastasia June Humphers-Ginther

Honors Capstone Portfolios

Anastasia (Annie) Humphers-Ginther's honors portfolio captured in December 2014.

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Citizen Science Reveals Widespread Negative Effects Of Roads On Amphibian Distributions, Bradley J. Cosentino, David M. Marsh, Kara S. Jones, Joseph J. Apodaca, Christopher Bates, Jessica Beach, Karen H. Beard, Kelsie Becklin, Jane Margaret Bell, Christopher Crockett, George Fawson, Jennifer Fjelsted, Elizabeth A. Forys, Kristen S. Genet, Melanie Grover, Jaimie Holmes, Katherine Indeck, Nancy E. Karraker, Eran S. Kilpatrick, Tom A. Langen, Stephen G. Mugel, Alessandro Molina, James R. Vonesh, Ryan J. Weaver, Anisha Willey Dec 2014

Citizen Science Reveals Widespread Negative Effects Of Roads On Amphibian Distributions, Bradley J. Cosentino, David M. Marsh, Kara S. Jones, Joseph J. Apodaca, Christopher Bates, Jessica Beach, Karen H. Beard, Kelsie Becklin, Jane Margaret Bell, Christopher Crockett, George Fawson, Jennifer Fjelsted, Elizabeth A. Forys, Kristen S. Genet, Melanie Grover, Jaimie Holmes, Katherine Indeck, Nancy E. Karraker, Eran S. Kilpatrick, Tom A. Langen, Stephen G. Mugel, Alessandro Molina, James R. Vonesh, Ryan J. Weaver, Anisha Willey

Wildland Resources Faculty Publications

Landscape structure is important for shaping the abundance and distribution of amphibians, but prior studies of landscape effects have been species or ecosystem-specific. Using a large-scale, citizen science-generated database, we examined the effects of habitat composition, road disturbance, and habitat split (i.e. the isolation of wetland from forest by intervening land use) on the distribution and richness of frogs and toads in the eastern and central United States. Undergraduates from nine biology and environmental science courses collated occupancy data and characterized landscape structure at 1617 sampling locations from the North American Amphibian Monitoring Program. Our analysis revealed that anuran species …

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Interactions Of Protist And Bacteria: A Mathematical Model, Matthew Le Dec 2014

Interactions Of Protist And Bacteria: A Mathematical Model, Matthew Le

2014 Fall Honors Capstone Projects - Archive

Relationships between interacting organisms generally have several key variables that describe the dynamics of their specific relationship. And the results from those symbiotic relationships are important in that both species are affected in a significant, observable way. With this in mind, it is found that the characteristic actions of each of the two species affect the population size of both species. This effect, caused by the species' actions and interactions is qualitatively noted and is further interpreted and quantized. The complicated relationship between a predator and its prey is broken down and analyzed to give better insight to the projected …

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Temperature-Dependence Of Stress-Related Phenomena, Rahmat Saptono Dec 2014

Temperature-Dependence Of Stress-Related Phenomena, Rahmat Saptono

Material Science and Engineering Dissertations - Archive

Efforts have been made to develop a simple but physically sound model. The model was specifically proposed to capture, explain, and estimate the temperature sensitivity and strengthening mechanism phenomena in small volume material with particular reference to the roles grain boundary and surface. Model-inspired phenomenology approach was applied to reveal the key mechanisms and find directions for a more complete constitutive model. The model was developed in the limited space where diffusion is insignificant. It was assumed that the plastic flow was predominantly governed by the thermally-activated process of dislocation glide overcoming barriers. Simple mathematical functions were formulated and evaluated …

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A Co-Teaching Program Evaluation In A School District In Missouri, Tanya Marie Deering Dec 2014

A Co-Teaching Program Evaluation In A School District In Missouri, Tanya Marie Deering

Dissertations

This study was a program evaluation on the co-teaching model within the Smallville School District (a pseudonym) measuring its effectiveness defined by the perceptions of leaders in the field of special education. This study filled the gap of previous co-teaching studies by investigating a rural school district, across all buildings. The researcher selected the tools of classroom observations; convenience sample interviews; administrator, teacher, student, and parent surveys; and secondary data from High Quality Professional Development (HQPD) and the school budget. The researcher collected data with surveys, observations, and interviews to determine the perceptions of all stakeholders involved in the co-teaching …

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Shape/Image Registration For Medical Imaging : Novel Algorithms And Applications., Ahmed Magdy Shalaby 1982- Dec 2014

Shape/Image Registration For Medical Imaging : Novel Algorithms And Applications., Ahmed Magdy Shalaby 1982-

Electronic Theses and Dissertations

This dissertation looks at two different categories of the registration approaches: Shape registration, and Image registration. It also considers the applications of these approaches into the medical imaging field. Shape registration is an important problem in computer vision, computer graphics and medical imaging. It has been handled in different manners in many applications like shapebased segmentation, shape recognition, and tracking. Image registration is the process of overlaying two or more images of the same scene taken at different times, from different viewpoints, and/or by different sensors. Many image processing applications like remote sensing, fusion of medical images, and computer-aided surgery …

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Transient Heat Transfer Between A Magnetocaloric Packed Particle Bed And Stagnant Interstitial Fluid., Michael G. Schroeder 1988- Dec 2014

Transient Heat Transfer Between A Magnetocaloric Packed Particle Bed And Stagnant Interstitial Fluid., Michael G. Schroeder 1988-

Electronic Theses and Dissertations

In the field of magnetocaloric heat pumps, many system models have been made. What most of these models lack is heat transfer occurring while there is no fluid motion. It is the objective of this paper to analytically determine and experimentally verify heat transfer with no bulk fluid motion. The addition of a pure dwell period to the typical magnetocaloric cycle was shown to have a positive performance impact in specific conditions. These conditions correspond to regenerators that are heat transfer rate limited in operation. The heat transfer mechanism for this particular case was shown to be pure conduction via …

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Ensemble Learning Method For Hidden Markov Models., Anis Hamdi Dec 2014

Ensemble Learning Method For Hidden Markov Models., Anis Hamdi

Electronic Theses and Dissertations

For complex classification systems, data are gathered from various sources and potentially have different representations. Thus, data may have large intra-class variations. In fact, modeling each data class with a single model might lead to poor generalization. The classification error can be more severe for temporal data where each sample is represented by a sequence of observations. Thus, there is a need for building a classification system that takes into account the variations within each class in the data. This dissertation introduces an ensemble learning method for temporal data that uses a mixture of Hidden Markov Model (HMM) classifiers. We …

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Mathematical Modeling For Partial Object Detection., Ahmed Reda Amin El-Barkouky Dec 2014

Mathematical Modeling For Partial Object Detection., Ahmed Reda Amin El-Barkouky

Electronic Theses and Dissertations

From a computer vision point of view, the image is a scene consisting of objects of interest and a background represented by everything else in the image. The relations and interactions among these objects are the key factors for scene understanding. In this dissertation, a mathematical model is designed for the detection of partially occluded faces captured in unconstrained real life conditions. The proposed model novelty comes from explicitly considering certain objects that are common to occlude faces and embedding them in the face model. This enables the detection of faces in difficult settings and provides more information to subsequent …

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Unnatural Pedagogy : A Computational Analysis Of Children's Learning To Learn From Other People., Baxter S. Eaves 1984- Dec 2014

Unnatural Pedagogy : A Computational Analysis Of Children's Learning To Learn From Other People., Baxter S. Eaves 1984-

Electronic Theses and Dissertations

Infants rely on others for much of what they learn. People are a ready source of quick information, but people produce data differently than the world. Data from a person are a result of that person's knowledgeability and intentions. People may produce inaccurate or misleading data. On the other hand, if a person is knowledgeable about the world and intends to teach, that person may produce data that are more useful than simply accurate data: data that are pedagogical. This idea that people have special innate methods for efficient information transfer lies at the heart of recent proposals regarding what …

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Avatar Captcha : Telling Computers And Humans Apart Via Face Classification And Mouse Dynamics., Darryl Felix D’Souza Dec 2014

Avatar Captcha : Telling Computers And Humans Apart Via Face Classification And Mouse Dynamics., Darryl Felix D’Souza

Electronic Theses and Dissertations

Bots are malicious, automated computer programs that execute malicious scripts and predefined functions on an affected computer. They pose cybersecurity threats and are one of the most sophisticated and common types of cybercrime tools today. They spread viruses, generate spam, steal personal sensitive information, rig online polls and commit other types of online crime and fraud. They sneak into unprotected systems through the Internet by seeking vulnerable entry points. They access the system’s resources like a human user does. Now the question arises how do we counter this? How do we prevent bots and on the other hand allow human …

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Graduate Students Who Are Part-Time Workers : How Does Occupational Stress And Gender Role Affect Job Satisfaction?, Megan Church-Nally Dec 2014

Graduate Students Who Are Part-Time Workers : How Does Occupational Stress And Gender Role Affect Job Satisfaction?, Megan Church-Nally

Electronic Theses and Dissertations

Job satisfaction and occupational stress have consistently been examined in professionals for decades due to its link to turnover and reduced productivity. Similar concepts have been investigated in undergraduate students, but there is paucity of research of attrition in graduate students. This gap persists despite estimates that 50% of graduate students fail to graduate (Cassuto, 2013). Such attrition is not due to deficiency in academic skills, as Carroll, Ng, and Birch (2009) reported that personal reasons were cited more than academic concerns for attrition. The purpose of this dissertation was to address this job satisfaction and occupational stress gap with …

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Classification Of Clinical Outcomes Using High-Throughput And Clinical Informatics., Alexander Carswell Cambon Dec 2014

Classification Of Clinical Outcomes Using High-Throughput And Clinical Informatics., Alexander Carswell Cambon

Electronic Theses and Dissertations

It is widely recognized that many cancer therapies are effective only for a subset of patients. However clinical studies are most often powered to detect an overall treatment effect. To address this issue, classification methods are increasingly being used to predict a subset of patients which respond differently to treatment. This study begins with a brief history of classification methods with an emphasis on applications involving melanoma. Nonparametric methods suitable for predicting subsets of patients responding differently to treatment are then reviewed. Each method has different ways of incorporating continuous, categorical, clinical and high-throughput covariates. For nonparametric and parametric methods, …

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Project Management And Its Relation To Long-Term Project Success : An Empirically Based Theoretical Framework., Youssef Ait Boudlal 1969- Dec 2014

Project Management And Its Relation To Long-Term Project Success : An Empirically Based Theoretical Framework., Youssef Ait Boudlal 1969-

Electronic Theses and Dissertations

Companies implement effective project management to successfully operate in turbulent market cycles and ensure the success of their endeavors. Project management is indispensable for most industrial sectors and is employed in a variety of for-profit and non-profit organizations. It can be considered as a management method that contributes value to a variety of organizations. Many practitioners and researchers have attempted to identify the causes of project failure, the factors of project success, and the criteria to gauge this success. There has been little agreement on what constitutes project success. In response to the widespread debate surrounding project success, several lists …

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Transfer And The Commodification Of Practice., Kenneth Andrew Smith Dec 2014

Transfer And The Commodification Of Practice., Kenneth Andrew Smith

Electronic Theses and Dissertations

This dissertation engages in a close reading of the research in composition on transfer, a concept that refers to how the practices learned in one situation influence what a person can do in a future situation. In the studies that have appeared over the last two decades, the results have indicated that not much transfers between writing courses and future contexts, whether they be disciplinary courses or professional workplaces. Yet, despite the increasing prominence of transfer research, little time has been spent discussing the uses and limitations of the concept. To better understand its growing popularity among researchers, I examine …

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Temporal Contextual Descriptors And Applications To Emotion Analysis., Haythem Balti Dec 2014

Temporal Contextual Descriptors And Applications To Emotion Analysis., Haythem Balti

Electronic Theses and Dissertations

The current trends in technology suggest that the next generation of services and devices allows smarter customization and automatic context recognition. Computers learn the behavior of the users and can offer them customized services depending on the context, location, and preferences. One of the most important challenges in human-machine interaction is the proper understanding of human emotions by machines and automated systems. In the recent years, the progress made in machine learning and pattern recognition led to the development of algorithms that are able to learn the detection and identification of human emotions from experience. These algorithms use different modalities …

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Aminooxy Reagents In Nanomedicine And Bioanalysis., Stephanie Mattingly Dec 2014

Aminooxy Reagents In Nanomedicine And Bioanalysis., Stephanie Mattingly

Electronic Theses and Dissertations

The development of nanomaterials as medical diagnostic and therapeutic agents is a rapidly expanding field. A brief search of the literature revealed that roughly half of all articles related to nanoparticle-based drug delivery were published after the onset of this thesis research, over the past 4 years. A few nano-based formulations have entered into clinical use, including liposomal drug formulations, protein-linked drugs, and nanoparticle-based MRI contrast agents. The chemistry that enables conjugation of a functional cargo, whether a drug, a targeting element, or a radionucleotide, to a nanocarrier is thus a critical component for development. Oximation is one of the …

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Triggered Release Of Small Molecules From Solid Supports Using Heat Or An Applied Magnetic Field., Ralph Jacob Knipp Dec 2014

Triggered Release Of Small Molecules From Solid Supports Using Heat Or An Applied Magnetic Field., Ralph Jacob Knipp

Electronic Theses and Dissertations

The reaction of an aminooxy moiety (RONH2) with an aldehyde or ketone carbonyl, an oximation reaction, results in the formation of robust oxime ether linkages. Oximation is a form of click chemistry and is chemoselective, occurs in a variety of solvents including water, and produces high yields with little to no purification. We were inspired to exploit the advantages of oximation reactions by attaching aminooxy-functionalized molecules to solid supports, thus allowing us to employ aminooxy chemistry in ways that cannot be achieved using solution phase. Chapter 1 provides a review of aminooxy chemistry, its advantages over similar reactions and its …

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