28,758 Works

Wading into the Stream of Forensics Research: The View from the Editorial Office

James F. Klumpp
Commentary on the state of research in debate and forensics in 1990.

New Wine in Old Bottles: \"Films without Celluloid\" and Making the Most of the Spaces You've Got

Andrew Horbal
Slides for a presentation delivered at the Innovative Library Classroom conference in Radford, VA on May 12, 2015.

WorldCat Local Usability at UMD

Alexander Carroll, Rebecca Goldfinger, Jaime Mears, Steven Quintilian & Madhu Singh
Describes the first iteration of the WorldCat Local Usability Study conducted by University Libraries during spring of 2015, including study design and preliminary results.

Copyright in the Film Studies Classroom

Andrew Horbal
Slides from a presentation given as part of a workshop called "Copyright and Video Production in the Film Studies Classroom" which was provided for faculty and graduate students in the Film Studies Program at the University of Maryland on February 20, 2015.

Leveraging Structure in Activity Recognition: Context and Spatiotemporal Dynamics

Sameh Khamis
Activity recognition is one of the fundamental problems of computer vision. An activity recognition system aims to identify the actions of humans from an image or a video. This problem has been historically approached in isolation, and typically as part of a multi-stage system, where tracking for instance is another part. However, recent work sheds light on how activity recognition is in fact entangled with other fundamental problems in the field. Tracking is one such...

Soot Oxidation in Hydrocarbon-free Flames

Haiqing Guo
There are high uncertainties in the existing models of soot oxidation rates. To ameliorate this, soot oxidation in flames was examined using a novel ternary flame system, advanced diagnostics, and a detailed examination of past studies. The ternary flame system comprises a coflowing propylene/air diffusion flame to generate a steady soot column that flows into a hydrogen ring flame. The soot is thereby oxidized in a region far separated from soot formation, which is unlike...

READING COMPREHENSION STRATEGY INSTRUCTION IN UPPER-ELEMENTARY CLASSROOMS WITH ENGLISH LANGUAGE LEARNERS: A STUDY OF PRACTICES AND OUTCOMES

Candice Briece Doyle
The goal of this study was to investigate the relationship between reading comprehension strategy instruction (explicit or skills-based) in general education settings and third through fifth grade students' reading comprehension outcomes. In addition, I was interested in whether relationships between instruction and outcomes differed for students from English only (EO) and English language learner (ELL) backgrounds. To address these goals I conducted a secondary data analysis of 59 Reading/Language Arts classroom observation transcripts. These represented...

Capital and Culture: William Wilson Corcoran and the Making of Nineteenth-Century America

Mark Laurence Goldstein
Capital and Culture: William Wilson Corcoran and the Making of Nineteenth-Century America explores the fascinating life of one of the nation's earliest and most successful political insiders, financiers, philanthropists, and shapers of the emerging cultural elite. Corcoran helped establish and normalize many important components of modern American culture. He played a key role in stabilizing and merchandizing U.S. financial securities at home and abroad and was responsible for significant developments in public debt war finance....

FUNDAMENTAL UNDERSTANDING OF SOFC CATHODE DURABILITY; A KINETICS AND CATALYSIS STUDY

Yi-Lin Huang
Solid oxide fuel cells (SOFC) have been demonstrated as great prospects for electrochemical conversion of fuels, providing both high efficiency and high power density. Understanding the fundamentals of the oxygen reduction reaction (ORR) mechanisms is necessary to further improve cathode performance. Two different testing systems, gas phase isotopic oxygen exchange and electrical conductivity relaxation, were built to study the kinetics of cathode powders and bulk samples, respectively. A robust strategy was established to extract kinetic...

Sleep throughout the alcoholism recovery process: a mixed methods examination of individuals' experiences transitioning from an inpatient research facility providing rehabilitation treatment to the community

Alyssa Todaro Brooks
Despite research establishing the relationship between sleep disturbances and alcohol use, there is no clear understanding or model for what occurs once individuals who seek inpatient alcoholism treatment are discharged from rehabilitation facilities and attempt to integrate back into their homes and communities. This study used a mixed methods approach to assess individuals' perceptions of and experiences with sleep throughout the process of alcohol rehabilitation and to explore associations between sleep-related beliefs/behavior, sleep quality, and...

Asymptotic problems for stochastic partial differential equations

Michael Salins
Stochastic partial differential equations (SPDEs) can be used to model systems in a wide variety of fields including physics, chemistry, and engineering. The main SPDEs of interest in this dissertation are the semilinear stochastic wave equations which model the movement of a material with constant mass density that is exposed to both determinstic and random forcing. Cerrai and Freidlin have shown that on fixed time intervals, as the mass density of the material approaches zero,...

THE ROLE OF DENIAL AND PERCEIVED HIV STIGMA AS BARRIERS TO ENGAGING IN HIV MEDICAL CARE AMONG HIV POSITIVE AFRICAN AMERICANS IN THE WASHINGTON, DC AREA

Tanya Geiger
HIV is a potentially fatal and highly stigmatized disease such that diagnosis with the disease is often met with high anxiety. Many people who test positive for HIV may not receive sufficient linkage to HIV care or do not remain engaged in continuous HIV medical care once they have entered care. While a considerable amount of research exists on referral, access, personal characteristics, and mental illness barriers associated with engagement in HIV medical care, far...

Modeling of Gas Turbine - Solid Oxide Fuel Cell Systems for Combined Propulsion and Power on Aircraft

Daniel Francis Waters
This dissertation investigates the use of gas turbine (GT) engine integrated solid oxide fuel cells (SOFCs) to reduce fuel burn in aircraft with large electrical loads like sensor-laden unmanned air vehicles (UAVs). The concept offers a number of advantages: the GT absorbs many SOFC balance of plant functions (supplying fuel, air, and heat to the fuel cell) thereby reducing the number of components in the system; the GT supplies fuel and pressurized air that significantly...

Information and environmental policy

Casey John Wichman
Within this manuscript, I present three distinct essays linked by the commonality of how information is utilized in decision-making and its effect on environmental policy. In the first essay, I evaluate the price to which consumers respond under complicated billing structures. I exploit a natural experiment to estimate a causal effect of price for residential water customers during the introduction of increasing block rates for a North Carolina utility. Perceived price is identified through a...

UNCERTAINTY ASSOCIATED WITH TRAVEL TIME PREDICTION: ADVANCED VOLATILITY APPROACHES AND ENSEMBLE METHODS

Yanru Zhang
Travel time effectively measures freeway traffic conditions. Easy access to this information provides the potential to alleviate traffic congestion and to increase the reliability in road networks. Accurate travel time information through Advanced Traveler Information Systems (ATIS) can provide guidance for travelers' decisions on departure time, route, and mode choice, and reduce travelers' stress and anxiety. In addition, travel time information can be used to present the current or future traffic state in a network...

Urbanicity and Academic Self-Concept

William Strein, Cyril Pickering & Julie Grossman
The main focus of this study was the relationships between school urbanicity (size of community in which the school is located) and fifth-grade students’ academic self-concepts. Using multi-level modeling methodology (HLM) we were able to investigate “school effects”, net of individual students’ characteristics. School urbanicity had no effect on reading, math, or general academic self-concept. School-level effects were found consistently for aggregate school achievement in reading and math, congruent with Marsh’s Big-Fish-Little-Pond effect. Less consistent...

Manure as a Natural Resource: Alternative Management Opportunities

Jarrod Miller & Jon Moyle
Manure, as a source of organic matter and plant nutrients, is an excellent conditioner for soils. As fertilizer in agronomic systems, manure can cycle nutrients between soils, plants and livestock. However, in areas where livestock become concentrated and limited land is available for application, excess nutrients can lead to water quality issues. If manure application is to be locally restricted, alternative uses must be found. These uses can be simple, such as transporting to nutrient...

Accurate computation of Galerkin double surface integrals in the 3-D boundary element method

Ross Adelman, Nail A. Gumerov & Ramani Duraiswami
Many boundary element integral equation kernels are based on the Green’s functions of the Laplace and Helmholtz equations in three dimensions. These include, for example, the Laplace, Helmholtz, elasticity, Stokes, and Maxwell equations. Integral equation formulations lead to more compact, but dense linear systems. These dense systems are often solved iteratively via Krylov subspace methods, which may be accelerated via the fast multipole method. There are advantages to Galerkin formulations for such integral equations, as...

MODELING PLASMA TRANSPORT AND WAVE GENERATION DURING IONOSPHERIC MODIFICATION EXPERIMENTS

Aram Vartanyan
Research on ionospheric modifications led to numerous studies of practical importance. This thesis highlights work carried out on this subject. Following an overview of plasma physics and ionospheric modification in Chapter 1, three main topics are discussed. Chapter 2 examines the effects of long-term HF heating of the ionosphere. It was found that the plasma expands and transports along Earth's magnetic field line, resulting in the formation of plasma ``tubes'' referred to as artificial ionospheric...

EXPLORING THE RELATIONSHIP BETWEEN INSTITUTIONAL REVENUE PATTERNS, STUDENT FINANCIAL AID PACKAGES, AND DEGREE COMPLETION FROM A MULTILEVEL PERSPECTIVE

Yekaterina Narozhnaya
This study utilized data from the 2004 Integrated Postsecondary Education Data Systems (IPEDS) and 2004-2009 Beginning Postsecondary Students (BPS) study to examine the extent to which institutional revenue patterns influence the relationship between college completion and first-year financial aid packages. It drew from resource dependence and financial aid theories to examine the research questions. Multilevel statistical techniques, specifically hierarchical generalized linear modeling (HGLM), were used to estimate the effects of individual- and institutional-level variables on...

Principals' Leadership Styles and the Impact on Student Achievement

Karim Shortridge
Title of Dissertation: PRINCIPALS' LEADERSHIP STYLES AND THE IMPACT ON STUDENT ACHIEVEMENT Karim K. Shortridge, Doctor of Education, 2015 Dissertation directed by: Dr. William Strein Department of Counseling, Higher Education, and Special Education As accountability efforts in education have increased, there has been an increased interest in the significance of effective instructional leadership. Policymakers have looked toward school-based leadership as a means to positively impact student achievement and to close the achievement gap. This political...

AN EMERGING GROUNDED THEORY OF FACULTY HIRING PROCESSES IN UNIONIZED COMPREHENSIVE UNIVERSITIES

Andrew Lounder
ABSTRACT Title of dissertation: AN EMERGING GROUNDED THEORY OF FACULTY HIRING PROCESSES IN UNIONIZED COMPREHENSIVE UNIVERSITIES Andrew D. Lounder, Doctor of Philosophy, 2015 Dissertation directed by: Professor KerryAnn O'Meara Department of Counseling, Higher Education, and Special Education Growth in part-time faculty workforces in U.S. higher education since 1970 has been remarkable. Part-time faculty growth as a percentage of the whole has occurred most rapidly in comprehensive universities in recent years and carries with it important...

FERROFLUIDS: MODELING, NUMERICAL ANALYSIS, AND SCIENTIFIC COMPUTATION

Ignacio Tomas
This dissertation presents some developments in the Numerical Analysis of Partial Differential Equations (PDEs) describing the behavior of ferrofluids. The most widely accepted PDE model for ferrofluids is the Micropolar model proposed by R.E. Rosensweig. The Micropolar Navier-Stokes Equations (MNSE) is a subsystem of PDEs within the Rosensweig model. Being a simplified version of the much bigger system of PDEs proposed by Rosensweig, the MNSE are a natural starting point of this thesis. The MNSE...

Career Aspirations of High School Males and Femailes in a Science, Technology, Engineering, and Mathematics Program

April Bishop
With the large number of Science, Technology, Engineering, and Mathematics (STEM) jobs across the nation and state which are unfilled due to lack of interested and qualified STEM applicants, there is a need for more students to leave high school, enter college in STEM majors and continue through the STEM pipeline to STEM careers. The purpose of this study was to determine the degree to which high school students who participate in a STEM program...

\"Making Our Lives\": The Contributions of Urban High School Cultures to the Future Selves of Black and Latino Adolescent Boys

Roderick LaMar Carey
This dissertation sought to answer the following research question: How, if at all, are Black and Latino adolescent boys' conceptions of their future selves shaped by school culture within an urban high school context? To answer this question, this study drew from various theoretical concepts of individuals' futures (see Kao & Tienda, 1998; Markus & Nurius, 1986; Nurmi, 1991; 2005), to utilize the term "future selves" to consider participants' goals for post secondary education, employment,...

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