Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (128)
- Social and Behavioral Sciences (110)
- Physical Sciences and Mathematics (88)
- Arts and Humanities (78)
- Life Sciences (75)
-
- Education (69)
- Mechanical Engineering (58)
- Psychology (39)
- Sociology (37)
- Electrical and Computer Engineering (33)
- Computer Sciences (27)
- Educational Psychology (23)
- Medicine and Health Sciences (23)
- Counseling Psychology (22)
- Family, Life Course, and Society (22)
- Special Education and Teaching (21)
- Linguistics (20)
- Civil and Environmental Engineering (19)
- Communication Sciences and Disorders (18)
- Animal Sciences (17)
- Chemical Engineering (17)
- English Language and Literature (17)
- Art Practice (15)
- Exercise Science (15)
- Kinesiology (15)
- Astrophysics and Astronomy (14)
- Chemistry (14)
- Physics (14)
- Biochemistry (13)
- Biochemistry, Biophysics, and Structural Biology (13)
- Keyword
-
- FPGA (6)
- TESOL (6)
- Narrative (5)
- Self-efficacy (5)
- Adolescent (4)
-
- Carbon nanotubes (4)
- Depression (4)
- Education (4)
- Family (4)
- Internal waves (4)
- Kenneth Burke (4)
- Latino (4)
- Mormon (4)
- Oxy-combustion (4)
- Relationship quality (4)
- Reliability (4)
- School (4)
- Simulation (4)
- Social engagement (4)
- Stress (4)
- Translation (4)
- Art education (3)
- Autism (3)
- BYU (3)
- Bibliotherapy (3)
- Child language (3)
- Collaboration (3)
- College students (3)
- Creativity (3)
- Culture (3)
Articles 511 - 539 of 539
Full-Text Articles in Entire DC Network
Monsters And Mayhem: Physical And Moral Survival In Stephen King's Universe, Jaime L. Davis
Monsters And Mayhem: Physical And Moral Survival In Stephen King's Universe, Jaime L. Davis
Theses and Dissertations
The goal of my thesis is to analyze physical and moral survival in three novels from King's oeuvre. Scholars have attributed survival in King's universe to factors such as innocence, imaginative capacity, and career choice. Although their arguments are convincing, I believe that physical and moral survival ultimately depends on a character's knowledge of the dark side of human nature and an understanding of moral agency. I have chosen three novels that span several decades of Kings work-'Salem's Lot, Needful Things, and Desperation-to illustrate the relationship between knowledge and survival. In 'Salem's Lot, King uses the main character's interest in …
Optical And Mass Spectrometric Studies Of A Helium Dielectric-Barrier Atmospheric-Pressure Plasma Jet Used As An Ambient Desorption Ionization Source, Matthew Spencer Heywood
Optical And Mass Spectrometric Studies Of A Helium Dielectric-Barrier Atmospheric-Pressure Plasma Jet Used As An Ambient Desorption Ionization Source, Matthew Spencer Heywood
Theses and Dissertations
Recently there has been a surge in the field of mass spectrometry centered around the concept of rapid analysis of target analytes with minimal or no sample preparation. The target analyte undergoes desorption from its surface of origin and is subsequently ionized under ambient conditions. The technique is termed ambient desorption/ionization mass spectrometry (ADI-MS). Since the introduction of ADI-MS in 2004, there has been an explosion of research based around the development of novel ambient desorption/ionization (ADI) sources with the capability of desorbing and ionizing a variety of target analytes from various sampling surfaces. One type of ADI source uses …
The Effect Of Smoking On Tuberculosis Incidence In Burdened Countries, Natalie Noel Ellison
The Effect Of Smoking On Tuberculosis Incidence In Burdened Countries, Natalie Noel Ellison
Theses and Dissertations
It is estimated that one third of the world's population is infected with tuberculosis. Though once thought a "dead" disease, tuberculosis is very much alive. The rise of drug resistant strains of tuberculosis, and TB-HIV coinfection have made tuberculosis an even greater worldwide threat. While HIV, poverty, and public health infrastructure are historically assumed to affect the burden of tuberculosis, recent research has been done to implicate smoking in this list. This analysis involves combining data from multiple sources in order determine if smoking is a statistically significant factor in predicting the number of incident tuberculosis cases in a country. …
Low-Photoluminescence Hollow Waveguide Platforms For High-Sensitivity Integrated Optical Sensors, Yue Zhao
Low-Photoluminescence Hollow Waveguide Platforms For High-Sensitivity Integrated Optical Sensors, Yue Zhao
Theses and Dissertations
This dissertation presents research on the fabrication of optofluidic sensor platforms, which consist of integrated hollow waveguides and solid waveguides. Antiresonant reflecting optical waveguides (ARROWs) filled with liquids or gases, can be used for high-sensitivity sensing in applications of biotechnology, chemical synthesis, and analytical chemistry. The fabrication method developed for integrated ARROW sensing platforms utilizes standard microfabrication processes and materials. Dielectric cladding layers are deposited on a silicon wafer using plasma-enhanced chemical vapor deposition (PECVD) or sputtering. A sacrificial material is then patterned over the bottom cladding layers by photolithography. Additional dielectric layers are deposited around the core, forming the …
Feasibility Of Tcp For Wireless Mesh Networks, Richard Lloyd Lee
Feasibility Of Tcp For Wireless Mesh Networks, Richard Lloyd Lee
Theses and Dissertations
When used in a wireless mesh network, TCP has shortcomings in the areas of throughput and fairness among traffic flows. Several methods have been proposed to deal with TCP's weakness in a wireless mesh, but most have been evaluated with simulations rather than experimentally. We evaluate several major enhancements to TCP – pacing, conservative windows, and delayed ACKs – to determine whether they improve performance or fairness in a mesh network operating in the BYU Computer Science building. We also draw conclusions about the effectiveness of wireless network simulators based on the accuracy of reported simulation results.
Feature Construction Using Evolution-Constructed Features For General Object Recognition, Kirt D. Lillywhite
Feature Construction Using Evolution-Constructed Features For General Object Recognition, Kirt D. Lillywhite
Theses and Dissertations
Object recognition is a well studied but extremely challenging field. Human detection is an especially important part of object recognition as it has played a role in machine and human interaction, biometrics, unmanned vehicles, as well as tracking and surveillance. We first present a hardware implementation of the successful Histograms of Oriented Gradients (HOG) method for human detection. The implementation significantly speeds up the method achieving 38 frames a second on VGA video while testing 11,160 sliding windows per frame. The accuracy remains comparable to the CPU implementation. Analysis of the HOG method and other popular object recognition methods led …
A Comparative Analysis Of Text Usage And Composition In Goscinny's Le Petit Nicolas, Goscinny's Astérix, And Albert Uderzo's Astérix, Dennis Scott Meyer
A Comparative Analysis Of Text Usage And Composition In Goscinny's Le Petit Nicolas, Goscinny's Astérix, And Albert Uderzo's Astérix, Dennis Scott Meyer
Theses and Dissertations
The goal of this thesis is to analyze the textual composition of René Goscinny’s Astérix and Le petit Nicolas, demonstrating how they differ and why. Taking a statistical look at the comparative qualities of each series of works, the structural differences and similarities in language use in these two series and their respective media are highlighted and compared. Though one might expect more complicated language use in traditional text by virtue of its format, analysis of average word length, average sentence length, lexical diversity, the prevalence of specific forms (the passé composé, possessive pronouns, etc.), and preferred collocations …
Using Agent-Based Models To Understand Multi-Operator Supervisory Control, Yisong Guo
Using Agent-Based Models To Understand Multi-Operator Supervisory Control, Yisong Guo
Theses and Dissertations
As technology advances, many practical applications require human-controlled robots. For such applications, it is useful to determine the optimal number of robots an operator should control to maximize human efficiency given different situations. One way to achieve this is through computer simulations of team performance. In order to factor in various parameters that may affect team performance, an agent-based model will be used. Agent-based modeling is a computational method that enables a researcher to create, analyze, and experiment with models composed of agents that interact within an environment [12]. We construct an agent-based model of humans interacting with robots, and …
Analysis And Characterization Of Author Contribution Patterns In Open Source Software Development, Quinn Carlson Taylor
Analysis And Characterization Of Author Contribution Patterns In Open Source Software Development, Quinn Carlson Taylor
Theses and Dissertations
Software development is a process fraught with unpredictability, in part because software is created by people. Human interactions add complexity to development processes, and collaborative development can become a liability if not properly understood and managed. Recent years have seen an increase in the use of data mining techniques on publicly-available repository data with the goal of improving software development processes, and by extension, software quality. In this thesis, we introduce the concept of author entropy as a metric for quantifying interaction and collaboration (both within individual files and across projects), present results from two empirical observational studies of open-source …
The Changing Meaning Of Marriage: An Analysis Of Contemporary Marital Attitudes Of Young Adults, Nicole Margaret Kay
The Changing Meaning Of Marriage: An Analysis Of Contemporary Marital Attitudes Of Young Adults, Nicole Margaret Kay
Theses and Dissertations
An interesting paradox in the literature about marriage is that despite the substantial changes to marriage over the last half century, young adults remain committed to the ideal of marriage. While changes to marriage as a social institution have been well documented, research concerning the contemporary attitudes of young adults about marriage has been limited. Even less research has focused on how these contemporary attitudes may cluster young adults into groups that have different perceptions of marriage. This study explores young single adult attitudes about marriage, and group differences in these attitudes. A quota sample (n=700) of 18-35 year-old young …
Real-Time Stereo Vision For Resource Limited Systems, Beau J. Tippetts
Real-Time Stereo Vision For Resource Limited Systems, Beau J. Tippetts
Theses and Dissertations
A significant amount of research in the field of stereo vision has been published in the past decade. Considerable progress has been made in improving accuracy of results as well as achieving real-time performance in obtaining those results. Although much of the literature does not address it, many applications are sensitive to the tradeoff between accuracy and speed that exists among stereo vision algorithms. Overall, this work aims to organize existing efforts and encourage new ones in the development of stereo vision algorithms for resource limited systems. It does this through a review of the status quo as well as …
Electron Microscopy Characterization Of Vanadium Dioxide Thin Films And Nanoparticles, Felipe Rivera
Electron Microscopy Characterization Of Vanadium Dioxide Thin Films And Nanoparticles, Felipe Rivera
Theses and Dissertations
Vanadium dioxide (VO_2) is a material of particular interest due to its exhibited metal to insulator phase transition at 68°C that is accompanied by an abrupt and significant change in its electronic and optical properties. Since this material can exhibit a reversible drop in resistivity of up to five orders of magnitude and a reversible drop in infrared optical transmission of up to 80%, this material holds promise in several technological applications. Solid phase crystallization of VO_2 thin films was obtained by a post-deposition annealing process of a VO_{x,x approx 2} amorphous film sputtered on an amorphous silicon dioxide (SiO_2) …
Integration Of Massive Multiplayer Online Role-Playing Games Client-Server Architectures With Collaborative Multi-User Engineering Cax Tools, Joshua D. Winn
Integration Of Massive Multiplayer Online Role-Playing Games Client-Server Architectures With Collaborative Multi-User Engineering Cax Tools, Joshua D. Winn
Theses and Dissertations
This research presents a new method for integrating client server architectures that are used for the development of Massive Online Role Playing Games (MMORPG) into multi-user engineering software tools. The new method creates a new architecture named CAx Connect by changing the client-pull-server communication pipeline to a server-push-client communication pipeline, effectively reducing the amount of bandwidth consumed and allowing these tools to utilize multiple server processors for complex calculations. This method was used on the new NX Connect multi-user CAx prototype developed at BYU. The new method provides a road map to further implement this architecture and its services into …
An Exploratory Analysis Of Factors Associated With Participation In Self-Directed And Traditional Marriage And Relationship Education, Shelece Mcallister
An Exploratory Analysis Of Factors Associated With Participation In Self-Directed And Traditional Marriage And Relationship Education, Shelece Mcallister
Theses and Dissertations
Although self-directed marriage and relationship education (MRE) has the potential to reach a larger or different audience than traditional MRE, little has been done to examine the characteristics of those who access self-directed materials. This study examined individual, couple, family, and sociocultural context variables that predicted participation in both self-directed and traditional MRE programs. A series of logistic regressions were conducted using SPSS 19.0. Different factors predicted participation for each intervention. For self-directed programs, those who were older, more educated, more religious, less materialistic, whose partners were more neurotic, who had been dating for a shorter amount of time, and …
Family Structure And Family Instability: Evaluating Their Influence On Adult Outcomes, Hsin-Yao Chiu
Family Structure And Family Instability: Evaluating Their Influence On Adult Outcomes, Hsin-Yao Chiu
Theses and Dissertations
Family structure is a widely used independent variable. However, in recent years researchers have questioned its predicting power. They also strive to improve its use. This study drew on Holman's (2001) theoretical model and examined the association between the family structure independent variables (Family Structure, Family Instability, and Parental Romantic Partners) and the outcome variables (Coming to Terms, Self-esteem, Maturity, and Depression). The analysis was conducted with a sample of 3,705 individuals (2,316 females and 1,389 males) randomly selected from the entire population that completed the Relationship Evaluation Questionnaire (RELATE). Results showed that Family Instability was a stronger predictor than …
Partial Characterization Of The Antimicrobial Activity Of Ccl28, Bin Liu
Partial Characterization Of The Antimicrobial Activity Of Ccl28, Bin Liu
Theses and Dissertations
This research focuses on the antimicrobial activity of the mouse chemokine CCL28. In addition to their well characterized chemotactic activity, many chemokines have been shown to be antimicrobial in vitro, including the mucosally expressed chemokine CCL28. I have investigated the primary sequence features required for antimicrobial activity, salt sensitive nature of killing/binding mechanism, and in vivo microbial interactions of CCL28. Through the use of protein mutation and expression techniques, I have shown that the holoprotein (108 amino acids) is necessary for full antimicrobial activity of CCL28. Furthermore, the C terminal region of CCL28 is essential for microbial killing as an …
Don't Worry....Be Happy: The Influence Of Parental Anxiety On Adolescent Self-Esteem, Holly Olson Coutts
Don't Worry....Be Happy: The Influence Of Parental Anxiety On Adolescent Self-Esteem, Holly Olson Coutts
Theses and Dissertations
The purpose of the current study was to explore the direct and indirect influences of both paternal and maternal anxiety on adolescent self-esteem as mediated by parental criticism and autonomy allowance. Participants included 331 parent-child triads with a child between the ages of 12 and 15 from the Flourishing Families Project. Findings suggested that maternal anxiety had a significant negative influence on adolescent self-esteem while paternal anxiety did not. Also, the influence of maternal anxiety on adolescent self-esteem was carried directly rather than indirectly through autonomy allowance and parental criticism; however, this influence was only significant prior to adolescent gender …
Commit Patterns And Threats To Validity In Analysis Of Open Source Software Repositories, Alexander Curtis Maclean
Commit Patterns And Threats To Validity In Analysis Of Open Source Software Repositories, Alexander Curtis Maclean
Theses and Dissertations
In the course of studying the effects of programming in multiple languages, we unearthed troubling trends in SourceForge artifacts. Our initial studies suggest that programming in multiple languages concurrently negatively affects developer productivity. While addressing our initial question of interest, we discovered a pattern of monolithic commits in the SourceForge community. Consequently, we also report on the effects that this pattern of commits can have when using SourceForge as a data-source for temporal analysis of open source projects or for studies of individual developers.
Imaging And Behavioral Correlates Of The Anterior Cingulate In Pediatric Traumatic Brain Injury, Tricia L. Merkley
Imaging And Behavioral Correlates Of The Anterior Cingulate In Pediatric Traumatic Brain Injury, Tricia L. Merkley
Theses and Dissertations
The anterior cingulate has been implicated in a number of cognitive processes that are at risk following traumatic brain injury (TBI), such as executive function and emotional processing. While the cingulate is believed to play a role in the above-mentioned cognitive processes, the relative roles of gray and white matter in functional outcomes post-TBI are not fully understood. The current study investigated various quantifiable brain properties (e.g., cortical thickness and volume, volume of underlying white matter, and white matter integrity) of the caudal anterior cingulate (CAC) gyrus and their relationships with behavioral measures of cognitive control following pediatric TBI. Parent …
Three-Dimensional Seismic Study Of Pluton Emplacement, Offshore Northwestern New Zealand, Jason Allen Luke
Three-Dimensional Seismic Study Of Pluton Emplacement, Offshore Northwestern New Zealand, Jason Allen Luke
Theses and Dissertations
Detailed 3D seismic images of a volcano-plutonic complex offshore northwestern New Zealand indicate the intrusive complex lies in a relay zone between NE-trending en echelon normal faults. A series of high angle normal faults fan out from the margin of the Southern Intrusive Complex and cut the folded strata along the margin. These faults terminate against the margins of the intrusion, extend as much as 1 pluton diameter away from the margin, and then merge with regional faults that are part of the Northern Taranaki Graben. Offset along these faults is on the order of 10s to over 100 meters. …
Measurement Of Plasma Density In A Gas-Filled Ionizing Laser Focus, Nathan Edward Heilmann
Measurement Of Plasma Density In A Gas-Filled Ionizing Laser Focus, Nathan Edward Heilmann
Theses and Dissertations
We use an interferometric method for measuring the plasma density in a laser-induced plasma as a function of time. Any changes in the density within 5 ns of generation is due plasma expansion and not recombination. The analytic solution for plasma expansion derived for ultracold Neutral Plasmas describes the expansion of our laser produced Neon plasma of densities up to approximately 40 Torr. A model for the utlracold neutral plasmas, in comparison with measurements of our plasmas, can be used to extract an electron temperature. Currently our plasmas have shown to have an electron temperature of approximately 44 eV.
Humanized Mice As A Model To Study Human Viral Pathogenesis And Novel Antiviral Drugs, Freddy Mauricio Sanchez Tumbaco
Humanized Mice As A Model To Study Human Viral Pathogenesis And Novel Antiviral Drugs, Freddy Mauricio Sanchez Tumbaco
Theses and Dissertations
Animal models have greatly contributed to the understanding of different aspects of human biology, as well as a variety of human-related pathogens and diseases. In order to study them, humanized mice susceptible to pathogens that replicate in human immune cells have been developed (e.g., humanized Rag2-/-γc-/- mice). These animals are engrafted with human hematopoietic stem cells (HSCs), resulting in the de novo development and maturation of the major functional components of the human adaptive immune system and the production of a variety of human cell types. Primary and secondary lymphoid organs in the mouse are populated with human cells, and …
A Parametric Investigation Of Pattern Separation Processes In The Medial Temporal Lobe, Sarah E. Motley
A Parametric Investigation Of Pattern Separation Processes In The Medial Temporal Lobe, Sarah E. Motley
Theses and Dissertations
The hippocampus is thought to be involved in memory formation and consolidation, with computational models proposing the process of pattern separation as a means for encoding overlapping memories. Previous research has used semantically related targets and lures to investigate hippocampal responses to mnemonic interference. Here, we attempted to define the response function of the hippocampus and its inputs during pattern separation by parametrically varying target-lure similarity in a continuous recognition task. We also investigated the effect of task demands (intentional versus incidental encoding) on pattern separation processes. We collected functional magnetic resonance imaging (fMRI) data while participants were shown a …
Dynamics Of The Solvent Exchange Reaction Of Weakly Bound Organic Solvents To Group 6 Transition Metal Carbonyls And The Molybdenum Hexacarbonyl Mediated Pauson-Khand Reaction, Richard J. Gates
Theses and Dissertations
Many organometallic reactions are solvent-dependent, suggesting solvent molecules interact with reaction intermediates. Studies of the solvent exchange reaction of group 6 transition metal carbonyls with moderately binding ligands have provided insight into these interactions, however, studies of the mechanism for this reaction with weakly binding ligands have not been performed. Experiments were conducted on the nanosecond time scale in methylcyclohexane over the temperature range of 4 to 44 °C using Step Scan FTIR (SS FTIR) spectroscopy with weakly binding ligands benzene and mesitylene. Upon photolysis of the metal hexacarbonyls, the kinetically favored product (M(CO)5(solv)), decays following pseudo-first-order kinetics to the …
The Influence Of Nozzle Spacing And Diameter On The Acoustic Emissions Of Closely Spaced Supersonic Jet Arrays, Ian S. Coltrin
The Influence Of Nozzle Spacing And Diameter On The Acoustic Emissions Of Closely Spaced Supersonic Jet Arrays, Ian S. Coltrin
Theses and Dissertations
The acoustic emissions from supersonic jets represent an area of significant research needs; not only in the field of aero-acoustics, but in industry as well where high pressure let down processes have been known to cause acoustically induced vibrations. A common method to reduce the acoustic emissions of such processes involves dividing the single larger supersonic flow into several smaller ones. Though this is common practice, there is not yet a current model which describes the reduction of acoustic emissions from an array of smaller supersonic jets. Current research which studies supersonic jet arrays are mainly focused on the effects …
A Design Basis For Composite Cascode Stages Operating In The Subthreshold/Weak Inversion Regions, Taylor Matt Waddel
A Design Basis For Composite Cascode Stages Operating In The Subthreshold/Weak Inversion Regions, Taylor Matt Waddel
Theses and Dissertations
Composite cascode stages have been used in operational amplifier designs to achieve ultra-high gain at very low power. The flexibility and simplicity of the stage makes it an appealing choice for low power op-amp designs. Op-amp design using the composite cascode stage is often made more difficult through the lack of a design process. A design process to aid in the selection of the MOSFET dimensions is provided in this thesis. This process includes a table-based method for selection of the widths and lengths of the MOSFETs used in the composite cascode stage. Equations are also derived for the gain, …
Using Hard Macros To Accelerate Fpga Compilation For Xilinx Fpgas, Christopher Michael Lavin
Using Hard Macros To Accelerate Fpga Compilation For Xilinx Fpgas, Christopher Michael Lavin
Theses and Dissertations
Field programmable gate arrays (FPGAs) offer an attractive compute platform because of their highly parallel and customizable nature in addition to the potential of being reconfigurable to any almost any desired circuit. However, compilation time (the time it takes to convert user design input into a functional implementation on the FPGA) has been a growing problem and is stifling designer productivity. This dissertation presents a new approach to FPGA compilation that more closely follows the software compilation model than that of the application specific integrated circuit (ASIC). Instead of re-compiling every module in the design for each invocation of the …
Characterization And Biomechanical Analysis Of The Human Lumbar Spine With In Vitro Testing Conditions, Dean K. Stolworthy
Characterization And Biomechanical Analysis Of The Human Lumbar Spine With In Vitro Testing Conditions, Dean K. Stolworthy
Theses and Dissertations
Biomechanical testing of cadaveric spinal segments forms the basis for our current understanding of healthy, pathological, and surgically treated spinal function. Over the past 40 years there has been a substantial amount of data published based on a spinal biomechanical testing regimen known as the flexibility method. This data has provided valuable clinical insights that have shaped our understanding of low back pain and its treatments. Virtually all previous lumbar spinal flexibility testing has been performed at room temperature, under very low motion rates, without the presence of a compressive follower-load to simulate upper body weight and the action of …
Biomechanical Implications Of Lumbar Spinal Ligament Transectiona Finite Element Study, Gregory Allen Von Forell
Biomechanical Implications Of Lumbar Spinal Ligament Transectiona Finite Element Study, Gregory Allen Von Forell
Theses and Dissertations
The purpose of this work was to determine the possible effects of isolated spinal ligament transection on the biomechanics of the lumbar spine. A finite element model of a lumbar spine was developed and validated against experimental data. The model was tested in the primary modes of spinal motion in the intact condition, followed by comparative analysis of isolated removal of each spinal ligament. Results showed that stress increased in the remaining ligaments once a ligament was removed, potentially leading to ligament damage. Results also showed changes in bone remodeling "stimulus" which could lead to changes in bone density. Isolated …