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Articles 481 - 510 of 3436
Full-Text Articles in Physical Sciences and Mathematics
Encirclement Of Moving Targets Using Noisy Range And Bearing Measurements, Cammy Peterson, Puneet Jain, Randal Beard
Encirclement Of Moving Targets Using Noisy Range And Bearing Measurements, Cammy Peterson, Puneet Jain, Randal Beard
Faculty Publications
This paper presents theoretically justified controllers that use relative range and bearing measurements to steer a team of autonomous vehicles, operating without inertial position information, to circular trajectories around a constant-acceleration, constant-velocity, or stationary target. An extended Kalman filter is used to improve the noisy relative measurements and estimate the velocity of the moving target. These estimated values are used in the control laws to encircle constant-velocity moving targets. Lyapunov techniques are utilized to show that the vehicle will converge to the desired circular formations. Additionally, cooperating vehicles are shown to converge to a circular formation with equal temporal spacing …
Sd3 Ptov1 Ptms, Joshua Andersen
Sd1 14-3-3 Interactome For Ptov1 Manuscript, Joshua Andersen
Sd1 14-3-3 Interactome For Ptov1 Manuscript, Joshua Andersen
ScholarsArchive Data
14-3-3 interactome
Sd2 Ptov1 Interactomics, Joshua Andersen
Sd1 14-3-3 Interactome For Ptov1 Manuscript, Joshua Andersen
Sd1 14-3-3 Interactome For Ptov1 Manuscript, Joshua Andersen
ScholarsArchive Data
Excel data sheet of MS data from 14-3-3 interactomics
Turn Of Phrase: Contrastive Pre-Training For Discourse-Aware Conversation Models, Roland Laboulaye
Turn Of Phrase: Contrastive Pre-Training For Discourse-Aware Conversation Models, Roland Laboulaye
Theses and Dissertations
Understanding long conversations requires recognizing a discourse flow unique to conversation. Recent advances in unsupervised representation learning of text have been attained primarily through language modeling, which models discourse only implicitly and within a small window. These representations are in turn evaluated chiefly on sentence pair or paragraph-question pair benchmarks, which measure only local discourse coherence. In order to improve performance on discourse-reliant, long conversation tasks, we propose Turn-of-Phrase pre-training, an objective designed to encode long conversation discourse flow. We leverage tree-structured Reddit conversations in English to, relative to a chosen conversation path through the tree, select paths of varying …
Exploring Non-Functional Coupling Between Subsystems, Matt Pope
Exploring Non-Functional Coupling Between Subsystems, Matt Pope
Theses and Dissertations
Many software systems depend on other systems to function correctly or are themselves composed of interdependent subsystems. In that context, behavioral changes in a dependency may have consequences for a dependent subsystem. This includes changes to non-functional properties such as latency or availability. In this paper we use the term non-functional coupling to mean the extent to which a subsystem is affected by changes to non-functional properties in a dependency. We argue that non-functional coupling has implications for the maintainability, reliability and performance of an overall system. We also explore the extent to which various engineering techniques used in interaction …
Impacts Of Manipulating Photoperiod On Circadian Rhythms Of Agave Photosynthesis, Robert Hadfield
Impacts Of Manipulating Photoperiod On Circadian Rhythms Of Agave Photosynthesis, Robert Hadfield
Undergraduate Honors Theses
Agave uses photoperiod, among other environmental conditions, to time its circadian rhythm of photosynthesis. Two species of Agave (A. americana and A. murpheyi) were tested under two extreme photoperiod conditions (constant light and constant dark) against a normal photoperiod control (12 hours light, 12 hours dark) to identify the impact of abnormal photoperiod on circadian rhythms of Agave photosynthesis. Under constant light conditions, normal oscillations in CO2 gas exchange became unpredictable in duration and amplitude in both species and became very infrequent in A. murpheyi. Under constant dark conditions, net CO2 uptake stabilized at a negative value and oscillations ceased …
A Usability Study Of Fido2 Roaming Software Tokens As A Password Replacement, Brian Rasmussen
A Usability Study Of Fido2 Roaming Software Tokens As A Password Replacement, Brian Rasmussen
Theses and Dissertations
The use of passwords for user authentication has significant shortcomings. As society becomes more dependent on the internet and web services, we need to find a replacement authentication method that users are willing to use. WebAuthn is one potential technology for password replacement. Recent studies have shown that users enjoy the usability of WebAuthn and hardware tokens as a password replacement but don't want to carry them around. Meanwhile, little to no research involves the use of software tokens. I carried out a user study of WebAuthn and roaming software tokens when used as a password replacement. We were able …
Immunoaffinity Monoliths For Multiplexed Extraction Of Preterm Birth Biomarkers From Human Blood Serum In 3d Printed Microfluidic Devices, Haifa Mohammad Almughamsi
Immunoaffinity Monoliths For Multiplexed Extraction Of Preterm Birth Biomarkers From Human Blood Serum In 3d Printed Microfluidic Devices, Haifa Mohammad Almughamsi
Theses and Dissertations
Preterm birth (PTB) results in over 15 million early births annually and is the leading cause of neonatal deaths. There are no clinical methods currently available to evaluate risk of PTB at early stages in pregnancy; thus, a rapid diagnostic to analyze PTB risk would be beneficial. Microfluidic immunoaffinity extraction is a promising platform for preparing complex samples, such as maternal serum with PTB risk biomarkers. 3D printed microfluidic devices have advantages over conventional microfluidic systems including simple fabrication and potential for iterative optimization to improve designs. In this work, I developed immunoaffinity monoliths in 3D printed microfluidic devices modified …
Predicting Human Behavior In Repeated Games With Attitude Vectors, Brian L. James
Predicting Human Behavior In Repeated Games With Attitude Vectors, Brian L. James
Theses and Dissertations
As Artificial Intelligence systems are used by human users at an increasing frequency, the need for such systems to understand and predict human behavior likewise increases. In my work, I have considered how to predict human behavior in repeated games. These repeated games can be applied as a foundation to many situations where a person may interact with an AI, In an attempt to create such a foundation, I have built a system using Attitude Vectors used in automata to predict actions based on prior actions and communications. These Attitude Vector Automata (AVA) can transform information from actions in one …
Molecular Dynamics Of Organometallic Systems, Ryan Wayne Carlsen
Molecular Dynamics Of Organometallic Systems, Ryan Wayne Carlsen
Theses and Dissertations
Metal-mediated organometallic reactions are critical for both catalytic and synthetic chemistry. Density functional theory (DFT) potential-energy calculations are routinely used with a transition-state theory type of approach to understand and predict the reaction mechanisms of organometallic reactions. However, these calculations do not include atomic momentum and thus ignore dynamic effects. Molecular dynamics is a powerful tool for elucidating mechanistic details of chemical reactions. In this dissertation, quasiclassical molecular dynamics studies reveal key mechanistic details about several fundamental organometallic reactions. Chapter 1 provides a brief overview of key molecular dynamics details. Chapters 2-4 provide details on for three classic organometallic reactions …
Decision Based Learning Course Design & Implementation For Introductory Statistics, Austin Heath
Decision Based Learning Course Design & Implementation For Introductory Statistics, Austin Heath
Undergraduate Honors Theses
Researchers in multiple industries (biomedicine, engineering, etc.) cite the selection of an appropriate statistical test as a common problem. Experts draw on a framework of conceptual and procedural knowledge to navigate when to use statistical methods. Students also struggle determining the correct statistical method to use for a given research question. This is because they lack the opportunity to practice recognizing a host of features in each research question that provide clues for experts as to which method is most appropriate. “Decision Based Learning” (DBL) is a teaching method designed to help teachers and students address this struggle. In this …
Petal Diagrams And Seifert Surfaces, Jason Robert Gardiner
Petal Diagrams And Seifert Surfaces, Jason Robert Gardiner
Theses and Dissertations
Petal diagrams of knots are projections of knots to the plane such that the diagram has exactly one crossing. Petal diagrams offer a convenient and combinatorial way of representing knots via their associated petal permutation. In this thesis we study the fundamental group and Seifert surfaces of knots in petal form. Using the Seifert-Van Kampen theorem, we give a group presentation of the fundamental group of the knot complement of a knot in petal form. We then discuss Seifert surfaces and use decomposition diagrams to represent the Seifert surfaces of knots in petal form. We finally give an algorithm to …
Synthesis And Biological Evaluation Of Pyrazolo[1,5-A]Pyrimidines And (4-Hydroxy-6-Trifluoromethylpyrimidin-2-Yl) Guanidines, Justin Dave Singleton
Synthesis And Biological Evaluation Of Pyrazolo[1,5-A]Pyrimidines And (4-Hydroxy-6-Trifluoromethylpyrimidin-2-Yl) Guanidines, Justin Dave Singleton
Theses and Dissertations
A microwave reactor was used to synthesize a series of novel 3,6-disubstituted or 3-substituted pyrazolo[1,5-a]pyrimidines in a total of 1 hour reaction time over 3 steps. The products were obtained in good to excellent yields (34-92%, ave = 52%) using a straightforward synthesis starting with the reaction of dimethylformamide-dimethylacetal with commercially available aryl acetonitriles (120C, 20 min). This was followed by treatment with H2NNH2 • HBr (120C, 20 min), and then reacted with either 1,1,3,3-tetramethoxypropane or a 2-aryl-substituted malondialdehydes (120C, 20 min). The resulting product was either collected on a sintered glass funnel or purified via column chromatography. The compounds …
2-Phosphinoimidazole Derived Monometallic And Bimetallic Catalysts, Erin Martinez
2-Phosphinoimidazole Derived Monometallic And Bimetallic Catalysts, Erin Martinez
Theses and Dissertations
Transition metal catalysis is a necessary branch of organic synthesis. Both monometallic and bimetallic catalysts can reduce reaction times, improve regio- and enantioselectivity, and minimize byproducts. Additionally, bimetallic catalysts can cooperatively activate substrates, which can enable new reactions and mechanistic pathways. The first half of this work will describe the synthesis and catalytic ability of our novel Pd(I) and Pd(II) dimers. Both dimers use a 2-phosphinoimidazole ligand scaffold to bring the metal centers in close proximity. The Pd(II) dimer can catalyze the synthesis of 1,3-disubstituted naphthalene rings from commercially available aryl iodides and methyl ketones with high regioselectivity and yields. …
Invariant Lattices Of Several Elliptic K3 Surfaces, Joshua Joseph Fullwood
Invariant Lattices Of Several Elliptic K3 Surfaces, Joshua Joseph Fullwood
Theses and Dissertations
This work is concerned with computing the invariant lattices of purely non-symplectic automorphisms of special elliptic K3 surfaces. Brandhorst gave a collection of K3 surfaces admitting purely non-symplectic automorphisms that are uniquely determined up to isomorphism by certain invariants. For many of these surfaces, the automorphism is also unique or the automorphism group of the surface is finite and with a nice isomorphism class. Understanding the invariant lattices of these automorphisms and surfaces is interesting because of these uniqueness properties and because it is possible to give explicit generators for the Picard and invariant lattices. We use the methods given …
An Εhf And Δ18o Isotopic Study Of Zircon Of The Mount Osceola And Conway Granites, White Mountain Batholith, New Hampshire: Deciphering The Petrogenesis Of A-Type Granites, Javier Fabian Matos Strauss
An Εhf And Δ18o Isotopic Study Of Zircon Of The Mount Osceola And Conway Granites, White Mountain Batholith, New Hampshire: Deciphering The Petrogenesis Of A-Type Granites, Javier Fabian Matos Strauss
Theses and Dissertations
A-type granites form in anorogenic settings and typically have high REE concentrations, K2O, Na2O, SiO2, FeOtotal, but low contents of Al2O3, MgO, CaO compared to other granite types. They have been divided in two groups according to their geochemical characteristics: differentiates of mantle-derived magmas (A1), and granites that are the result of melting depleted, lower crust (A2). The two largest A-type granites of the Mesozoic White Mountain Batholith of New Hampshire are the Mount Osceola and Conway granites. Electron microprobe analyses of biotite and amphibole in both granites are similar to those in other A-type granites: Fe-rich, but low MgO, …
Relative Infrasound Calibration Of Microphones With Application To Outdoor Vector Intensity Measurements, Francisco Javier Irarrazabal Oliva
Relative Infrasound Calibration Of Microphones With Application To Outdoor Vector Intensity Measurements, Francisco Javier Irarrazabal Oliva
Theses and Dissertations
This thesis describes the phase and amplitude correction of 12.7 mm diameter, Type-1 microphones for three frequency bands, including within the infrasound regime, and its application to acoustic measurements. Previous data stem from acoustic intensity measurements using two-dimensional, four-microphone probes, which emphasized the requirement of having the acoustic phase and amplitude difference be much greater than the interchannel mismatch. Although correcting the amplitude/phase is well-known, obtaining the necessary transfer functions in the infrasound regime is challenging because (1) signal-to-noise ratios are often poor, (2) long measurement times are required for averaging, and (3) microphone responses vary significantly across these low …
Synthesis And Utility Of Chiral And Achiral Trifluoroacetamide Substrates In Cycloaddition Reactions, Isaac Theodore Smith
Synthesis And Utility Of Chiral And Achiral Trifluoroacetamide Substrates In Cycloaddition Reactions, Isaac Theodore Smith
Theses and Dissertations
In this document we report the synthesis, characterization, and utility of a chiral amidoacrylate substrate. This substrate features a reactive alkene that can be used in a variety of reactions. [3+2]-Cycloaddition reactions to form pyrroloindolines are shown to proceed with excellent diastereoselectivity (>20:1) and yield (86%). [3+2]-Reactions allow for the stereoselective construction of the pyrroloindoline backbone common in many natural products. Diels-Alder reactions catalyzed by TiCl4 show high yields (82%) with ~2:1 diastereoselectivity. Cyclopropanation reactions proceed in moderate yield (71%) and diastereoselectivity (~3:1). Both Diels-Alder and cyclopropanation reactions utilizing the chiral amidoacrylate substrate serve to stereoselectively produce unnatural amino …
Protein Conformational Stability Enhancement Through Pegylation And Macrocyclization, Qiang Xiao
Protein Conformational Stability Enhancement Through Pegylation And Macrocyclization, Qiang Xiao
Theses and Dissertations
PEGylation can improve the pharmacokinetic properties of protein therapeutics via decreasing renal clearance and shielding the protein surface from proteases, antibody neutrailization, and aggregation. Conformational stability enhancement can provide criteria for the identification of optimal sites for PEGylation, but how PEG influence the noncovalent interactions from the surface of proteins has not been well illustrated. Macrocyclization can effectively enhance the conformational stability of small peptides and large proteins. Combination of PEG-based conformational stability enhancement and macrocyclization-based conformational constraint has not been explored. Macrocycliziation has been employed to stabilize protein tertiary structures, but there are no general guidelines for interhelical staple …
Nonlinear Ultrafast Excitation And Two-Dimensional Terahertz Spectroscopy Of Solids, Brittany E. Knighton
Nonlinear Ultrafast Excitation And Two-Dimensional Terahertz Spectroscopy Of Solids, Brittany E. Knighton
Theses and Dissertations
Ultrafast spectroscopy allows us to probe and understand material properties. With it, we can measure phonon-polaritons (optical phonons coupled with light) and the resulting dispersion curve in lithium niobate. Customizing the excitation source in ultrafast measurements can excite phonon modes to large amplitudes, allowing the experimental exploration of the Potential Energy Surface in solids. However, stronger pump fluences and bigger signal isn't always the answer in ultrafast spectroscopy. When sample signals and their nonlinear and mechanisms cannot be distinguished with 1D measurements, simple 2D THz measurements are a great place to start searching for distinct factors as was the case …
Plot Extraction And The Visualization Of Narrative Flow, Michael A. Debuse
Plot Extraction And The Visualization Of Narrative Flow, Michael A. Debuse
Theses and Dissertations
In order to facilitate the automated extraction of complex features and structures within narrative, namely plot in this study, two proof-of-concept methods of narrative visualization are presented with the goal of representing the plot of the narrative. Plot is defined to give a basis for quality assessment and comparison. The first visualization presented is a scatter-plot of entities within the story, but due to failing to uphold the definition of plot, in-depth analysis is not performed. The second visualization presented is a graph structure that better represents a mapping of the plot of the story. Narrative structures commonly found within …
3-Adic Properties Of Hecke Traces Of Singular Moduli, Miriam Beazer
3-Adic Properties Of Hecke Traces Of Singular Moduli, Miriam Beazer
Theses and Dissertations
As shown by Zagier, singular moduli can be represented by the coefficients of a certain half integer weight modular form. Congruences for singular moduli modulo arbitrary primes have been proved by Ahlgren and Ono, Edixhoven, and Jenkins. Computation suggests that stronger congruences hold for small primes $p \in \{2, 3, 5, 7, 11\}$. Boylan proved stronger congruences hold in the case where $p=2$. We conjecture congruences for singular moduli modulo powers of $p \in \{3, 5, 7, 11\}$. In particular, we study the case where $p=3$ and reduce the conjecture to a congruence for a simpler modular form.
The Non-Backtracking Spectrum Of A Graph And Non-Bactracking Pagerank, Cory Glover
The Non-Backtracking Spectrum Of A Graph And Non-Bactracking Pagerank, Cory Glover
Theses and Dissertations
This thesis studies two problems centered around non-backtracking walks on graphs. First, we analyze the spectrum of the non-backtracking matrix of a graph. We show how to obtain the eigenvectors of the non-backtracking matrix using a smaller matrix and in doing so, create a block diagonal decomposition which more clearly expresses the non-backtracking matrix eigenvalues. Additionally, we develop upper and lower bounds on the matrix spectrum and use the spectrum to investigate properties of the graph. Second, we investigate the difference between PageRank and non-backtracking PageRank. We show some instances where there is no difference and develop an algorithm to …
Emotional Geographies Of Beginning And Veteran Reformed Teachers In Mentor/Mentee Relationships, Emily Joan Adams
Emotional Geographies Of Beginning And Veteran Reformed Teachers In Mentor/Mentee Relationships, Emily Joan Adams
Theses and Dissertations
Reformed teaching is better for students' conceptual understanding compared to the more popular traditional style of teaching. Many beginning teachers wanting to teach reformed conform to traditional teaching within their first couple years of teaching. I argue that this can happen because the emotional labor to continue teaching reformed without support is too high. Having a reformed math mentor can decrease this emotional labor and provide more support to beginning reformed teachers. This study builds on and adds to Hargreaves (2001) emotional geography framework to better understand the emotional closeness/distance beginning and veteran reformed teachers have talking about their practice. …
Tp-5801 In Vitro Kinase Screen Data, Joshua Andersen
Tp-5801 In Vitro Kinase Screen Data, Joshua Andersen
ScholarsArchive Data
In vitro kinase screen data for TP-5801 to accompany Chan and Egbert et al., Nature Communications, 2021 (in press)
Sequence Specific Concentration And Labeling Of Bacterial Plasmids For Future Use In Detection Of Drug-Resistant Sepsis Cases Without Amplification, Robert L. Hanson
Sequence Specific Concentration And Labeling Of Bacterial Plasmids For Future Use In Detection Of Drug-Resistant Sepsis Cases Without Amplification, Robert L. Hanson
Theses and Dissertations
Rapidly diagnosing the precise drug resistance present in sepsis-inducing bacteria is a continuing need to maintain the efficacy of our medical systems. Diagnostics currently being developed for such scenarios are either sensitive or rapid, but not both. Sequence-specific single DNA molecule analysis could fill this gap if it could be adapted to work on smaller targets, similar to those produced by classical biological methods. In this work, I demonstrate that immobilized ssDNA in the appropriate hybridization buffer can rapidly pull its complementary sequence out of solution. I also demonstrate that such systems in a microfluidic chip can be used to …
Localized Anthropogenic And Geogenic Groundwater Contamination In The Structurally Complex Carbonate-Hosted East Tintic Mining District, Eureka, Ut, Usa, Cameron Patrick Cordner
Localized Anthropogenic And Geogenic Groundwater Contamination In The Structurally Complex Carbonate-Hosted East Tintic Mining District, Eureka, Ut, Usa, Cameron Patrick Cordner
Theses and Dissertations
Legacy mining areas throughout the world contain widespread contaminated surface and groundwater from both anthropogenic and geogenic sources. Abandoned mine waste can contribute harmful solutes to groundwater and surface water, as metals mobilize through oxidation of sulfide minerals. Geogenic contaminant sources, such as geothermal water and mineralization, may also contribute to groundwater pollution in mining areas. To investigate the relationship between various groundwater contamination sources in legacy mining areas we sampled ~30 cold springs in the East Tintic Mountains of Utah and 8 regional hot springs as a proxy for geothermal water during fall 2019 and spring/summer 2020. Water chemistry …
Bottom-Up Fabrication And Characterization Of Dna Origami-Templated Electronic Nanomaterials, Basu Ram Aryal
Bottom-Up Fabrication And Characterization Of Dna Origami-Templated Electronic Nanomaterials, Basu Ram Aryal
Theses and Dissertations
This work presents the bottom-up fabrication of DNA origami-assembled metal nanowires and metal-semiconductor junctions, and their electrical characterization. Integration of metal and semiconductor nanomaterials into prescribed sites on self-assembled DNA origami has facilitated the fabrication of electronic nanomaterials, whereas use of conventional tools in their characterization combines bottom-up and top-down technologies. To expand the contemporary DNA-based nanofabrication into nanoelectronics, I performed site-specific metallization of DNA origami to create arbitrarily arranged gold nanostructures. I reported improved yields and conductivity measurements for Au nanowires created on DNA origami tile substrates. I measured the conductivity of C-shaped Au nanowires created on DNA tiles …