Digital Commons Network^™

Evolution Of Mg Az31 Twin Activation With Strain: A Machine Learning Study, Andrew D. Orme

Undergraduate Honors Theses

Machine learning is being adopted in various areas of materials science to both create predictive models and to uncover correlations which reveal underlying physics. However, these two aims are often at odds with each other since the resultant predictive models generally become so complex that they can essentially be described as a black box, making them difficult to understand. In this study, complex relationships between microstructure and twin formation in AZ31 magnesium are investigated as a function of increasing strain. Supervised machine learning is employed, in the form of J-48 decision trees. In one approach, strain is incorporated as an …

Strategic Implications Of Blockchain, William R. Adams

Undergraduate Honors Theses

This thesis introduces blockchain, the underlying technology of cryptocurrencies such as Bitcoin, and discusses how best to conceptualize it relative to other technologies. Following an explanation of the fundamentals of blockchain, also known as the distributed ledger, I identify the characteristics of the technology. Building upon blockchain’s inherent strengths and limitations, I explore potential business applications of blockchain. Finally, I recommend that leaders continue to track the development and adoption of blockchain technology, even if they decide that implementing it does not align with their organization’s strategy at present.

Effectiveness Of Different Regime Types In Preserving Common Resources: Evidence From A Lab Experiment, David Bates

Undergraduate Honors Theses

This experiment is based on a game-theoretic problem that has troubled the field of political economy since people first started grazing cows in pastures: how can economies best solve collective action problems? This experiment looks at one aspect of this question—types of governance. Are different styles of government (democracies, dictatorships, etc) more or less likely to prevent a common-pool resource (as these goods are called by Elinor Ostrom) from being depleted? Or is the style of governance irrelevant to the question of whether a CPR (common-pool resource) is sustained?

The problem of CPRs (common pool resources) is much the same …

The Impact Of Gap Years On Academic Outcomes For Women: A Case Study From The Missionary Age Change, Margaret Marchant

Undergraduate Honors Theses

Young adults throughout the United States and other countries participate in “gap years,” or time away from school, often for travel, work, or volunteering. This practice is promoted as a way to mature and refocus. However, some worry that it lowers the likelihood of college completion. Previous literature has investigated the academic, social, and personal benefits of gap years with mixed results; however selection into gap years confounds the true impact with unobservable personal characteristics. To overcome selection issues, I exploit an exogenous policy change that lowered age requirements for missionary service, a unique type of gap year, resulting in …

Uncertainty In Optical Particulate Counting Sensors, Jared Todd Blanchard

Undergraduate Honors Theses

To mitigate the health problems and environmental damage caused by the burning of biomass in homes across the developing world, there is an international effort to design clean burning cookstoves that burn with greater efficiency and emit fewer harmful substances. An important tool for gauging the effectiveness of these alternate stoves is the optical particulate counting (OPC) sensor, which comes in many varieties. To facilitate comparison between measurements from different models, a mathematical model and uncertainty analysis method for OPC’s have been developed. These may be applied to any light-scattering OPC. In addition, a low-cost physical system was developed to …

Reducing The Constraints To School Access And Progress: Assessing The Effects Of A School Scholarship Program In Malawi, Stephen Hunsaker

Undergraduate Honors Theses

The study utilizes a causal-comparative research design to compare the educational experiences and outcomes of two student groups – those who did and those who did not receive a needs-based scholarship to attend secondary or tertiary school. We administered surveys to 89 scholarship recipients and 57 non-recipients in the Dowa, Kasungu and Lilongwe Districts of Malawi. Surveys included items to determine group differences across a range of short and medium-term outcomes, including: career aspirations, attendance rate, withdrawal rate, graduation rate, employment status, time unemployed since graduation, and employment quality (using the Tanzanian Standard Classification of Occupations). This study included students …

A Software System Proposing The Processing Of Crowdsourced Data To Monitor A Flood Event: An A.I. Approach, Arya Tanmay Gupta

Open Water Journal

We present Fics (Fetch information through crowdsourcing), a platform that is ready-to-take posts from social media platforms and infers the water heights referred in them. These posts are expected to come from the citizens who are witnessing a flood event in real time. Fics corrects the spacing in the string, translates the string into corresponding mathematical notations and then finally compute the water heights from the posts.

The objective of Fics is to provide such a platform that can be used for the citizens from the data received from them only, without making them use a software which is to …

Adaptive Control For Inflatable Soft Robotic Manipulators With Unknown Payloads, Jonathan Spencer Terry

Theses and Dissertations

Soft robotic platforms are becoming increasingly popular as they are generally safer, lighter, and easier to manufacture than their more rigid, heavy, traditional counterparts. These soft platforms, while inherently safer, come with significant drawbacks. Their compliant components are more difficult to model, and their underdamped nature makes them difficult to control. Additionally, they are so lightweight that a payload of just a few pounds has a significant impact on the manipulator dynamics. This thesis presents novel methods for addressing these issues. In previous research, Model Predictive Control has been demonstrably useful for joint angle control for these soft robots, using …

Building Procedural Fluency From Conceptual Understanding In Equivalence Of Fractions: A Content Analysis Of A Textbook Series, Mark S. Nance

Theses and Dissertations

During the last several decades, mathematics reform has emphasized the goal of ensuring that students develop both conceptual and procedural understanding in mathematics. The current mathematics reform, Common Core State Standards for Mathematics (National Governors Association and the Council of Chief State School Officers [NGA Center & CCSSO], 2010), promotes this goal, with procedural knowledge building upon a strong conceptual base. This study uses content analysis to investigate the extent and ways in which Houghton Mifflin Harcourts Go Math! K-8 (HMH, 2016) supports teachers in building procedural fluency from conceptual understanding when teaching equivalence of fractions.Krippendorfs (1980) framework for content …

A Definition And Demonstration Of Developable Mechanisms, Trent Karl Zimmerman

Theses and Dissertations

There is an increasing need for compact mechanical systems that can accomplish sophisticated tasks. Technologies like ortho-planar and lamina emergent mechanisms (LEMs) have been developed to satisfy needs like these by stowing in planar sheets from which they emerge to perform their function. They can be compact, lightweight, monolithic, scalable, and can withstand harsh environments. They are limited, however, by their base element---planar surfaces. Applications requiring these advantages often include curved surfaces, like aircraft wings, needles, and automotive bodies. In this research, developable mechanisms are presented as a solution to satisfy the need for mechanisms that can conform to or …

The Phoenicians And The Formation Of The Western World, John C. Scott

Comparative Civilizations Review

No abstract provided.

Integrated Free-Form Method For Aerostructural Optimization Of Wind Turbine Blades, Ryan Barrett, Andrew Ning

Faculty Publications

A typical approach to optimize wind turbine blades separates the airfoil shape design from the blade planform design. This approach is sequential, where the airfoils along the blade span are pre-selected or optimized and then held constant during the blade planform optimization. In contrast, integrated blade design optimizes the airfoils and the blade planform concurrently and thereby has the potential to reduce cost of energy (COE) more than sequential design. Nevertheless, sequential design is commonly performed because of the ease of precomputation, or the ability to compute the airfoil analyses prior to the blade optimization. This research compares two integrated …

Does Belarusian-Ukrainian Civilization Belong To The Western Or The Latin Civilization?, Piotra Murzionak

Comparative Civilizations Review

No abstract provided.

One Word Synonyms For "The Comparative Study Of Civilizations", Roger Wescott

Comparative Civilizations Review

No abstract provided.

Guide To The Iscsc Archives, Dickinson College

Comparative Civilizations Review

No abstract provided.

Using Collapsible Systems To Mitigate Buckling In Thin Flexible Instruments In Robotic Surgery, Brandon Scott Sargent

Theses and Dissertations

Robotic surgery procedures may include long, thin flexible instruments that are inserted by the robot into the patient. As the robot inserts these devices, due to their geometry, they are prone to buckling failure. To mitigate buckling failure, a support system is needed on the robot. This system supports the device but also adapts to the varying ex vivo length of the device as it is inserted. This work presents four collapsible support systems designed to mitigate buckling failure of long, thin instruments while accounting for changing length. The Ori-Guide is an origami-inspired system that has enabled a part reduction …

Using Video Self-Modeling To Improve Reading Fluency In School Aged Children With Specific Learning Disabilities, Chelsea Nicole Ollar

Theses and Dissertations

Effective reading interventions for students with specific learning disabilities (SLD) are needed. A multiprobe multiple baseline across participants design was used to evaluate the effects of a video self-modeling intervention (VSM) on reading fluency skills. The VSM interventions effects on self-efficacy were also measured. Four male middle school students with SLD watched a pre-recorded video of themselves reading a passage fluently and were then asked to read another passage. Words correct per minute (WCPM) and accuracy data were taken. Results showed that students read significantly more words correct when they watched themselves read the same passage they were about to …

Application Of Mixture Design Response Surface Methodology For Combination Chemotherapy In Pc-3 Human Prostate Cancer Cells, Richard Vernon Oblad

Theses and Dissertations

Combining chemotherapeutics to treat malignant tumors has been shown to be effectivein preventing drug resistance, tumor recurrence, and reducing tumor size. We modeledcombination drug therapy in PC-3 human prostate cancer cells using mixture design responsesurface methodology (MDRSM), a statistical technique designed to optimize compositions thatwe applied in a novel manner to design combinations of chemotherapeutics. Conventionalchemotherapeutics (mitoxantrone, cabazitaxel, and docetaxel) and natural bioactive compounds(resveratrol, piperlongumine, and flavopiridol) were used in twelve different combinationscontaining three drugs at varying concentrations. Cell viability and cell cycle data werecollected and used to plot response surfaces in MDRSM that identified the most effectiveconcentrations of each …

Dynamics For A Random Differential Equation: Invariant Manifolds, Foliations, And Smooth Conjugacy Between Center Manifolds, Junyilang Zhao

Theses and Dissertations

In this dissertation, we first prove that for a random differential equation with the multiplicative driving noise constructed from a Q-Wiener process and the Wiener shift, which is an approximation to a stochastic evolution equation, there exists a unique solution that generates a local dynamical system. There also exist a local center, unstable, stable, centerunstable, center-stable manifold, and a local stable foliation, an unstable foliation on the center-unstable manifold, and a stable foliation on the center-stable manifold, the smoothness of which depend on the vector fields of the equation. In the second half of the dissertation, we show that any …

A New Family Of Topological Invariants, Nicholas Guy Larsen

Theses and Dissertations

We define an extension of the nth homotopy group which can distinguish a larger class of spaces. (E.g., a converging sequence of disjoint circles and the disjoint union of countably many circles, which have isomorphic fundamental groups, regardless of choice of basepoint.) We do this by introducing a generalization of homotopies, called component-homotopies, and defining the nth extended homotopy group to be the set of component-homotopy classes of maps from compact subsets of (0,1)ⁿ into a space, with a concatenation operation. We also introduce a method of tree-adjoinment for "connecting" disconnected metric spaces and show how this method can …

A Geomorphological Study Of Yardangs In China, The Altiplano/Puna Of Argentina, And Iran As Analogs For Yardangs On Titan, Dustin Shawn Northrup

Theses and Dissertations

Collections of straight, RADAR-bright, linear features, or BLFs, on Saturn's moon Titan are revealed in Cassini SAR (Synthetic Aperture RADAR) images. Most are widely distributed across the northern midlatitudes SAR on SAR swaths T18, T23, T30, T64, and T83 and in swath T56 in the southern midlatitudes. To understand the origin of these features, we compare them with terrestrial yardangs in Dunhuang, China, the Altiplano/Puna of Argentina, and the Lut Desert of Iran and with a similar morphological landform, linear dunes in the Namib Sand Sea, Namibia and on Titan. We apply a statistical classification model developed through random forests, …

The Estimation Of The Rapidscat Spatial Response Function, Samuel Gary Bury

Theses and Dissertations

RapidScat is a pencil-beam wind scatterometer which operated from September 2014 to August 2016. Mounted aboard the International Space Station (ISS), RapidScat experiences significant altitude and attitude variations over its dataset. These variations need to be properly accounted for to ensure accurate calibration and to produce high resolution scatterometer images. Both the antenna pose and the one-way antenna pattern need to be validated. The spatial response function (SRF) is the two-way antenna pattern for a scatterometer combined with the processing and filtering done in the radar system electronics, and is dominated by the two-way pattern. To verify the pointing of …

Simulation And Experiments To Understand The Manufacturing Process, Microstructure And Transport Properties Of Porous Electrodes, Mohammad Mehdi Forouzan

Theses and Dissertations

Battery technology is a great candidate for energy storage applications. The need for high-performance and cost-effective batteries has motivated researchers to put much effort into improving battery performance. In this work, we attempt to understand the elements that affect the microstructure and performance of two battery systems. The first part of this work focuses on the investigation of transport and structural properties of porous electrodes in an alkaline electrolyte. A DC polarization method was deployed for tortuosity measurements. An apparatus was designed to flow specified current through and measure the voltage drop over the porous electrodes. Using a modified Ohm's …

Subtraction Games: Range And Strict Periodicity, Bryce Emerson Blackham

Theses and Dissertations

In this paper I introduce some background for subtraction games and explore the Sprague-Grundy functions defined on them. I exhibit some subtraction games where the functions are guaranteed to be strictly periodic. I also exhibit a class of subtraction games which have bounded range, and show there are uncountably many of these.

Optimization Methods For A Reconfigurable Ota Chamber, Matthew David Arnold

Theses and Dissertations

Multiple-input multiple-output (MIMO) technology has enabled increased performance of wireless communication devices. The increased complexity associated with MIMO devices requires more realistic testing environments to ensure device performance. This testing can be accomplished by either very accurate but expensive anechoic chambers, less accurate but inexpensive mode-stirred chambers, or the newly introduced reconfigurable over-the-air chamber (ROTAC) that combines the benefits of both anechoic chambers and reverberation chambers. This work focuses on efficient optimization methods to quantify the performance of the ROTAC. First, an efficient optimization technique that combines convex optimization and a simple gradient descent algorithm is developed that can be …

A Geophysical And Geological Analysis Of A Regressive-Phase Lake Bonneville Deposit, Pilot Valley, Nv, Katelynn Marie Smith

Theses and Dissertations

Pilot Valley, located in the eastern Basin and Range, north of Wendover, UT, contains numerous shorelines and depositional remnants of late Pleistocene Lake Bonneville. These remnants present classic ground penetrating radar (GPR) targets due to their coherent stratification, low clay, low salinity, and low moisture content. Three-dimensional (3D) GPR imaging can resolve fine-scale stratigraphy of these deposits down to a few centimeters. While lake levels fluctuated due to flooding events, climatic changes were the dominant factor in controlling lake levels. In Pilot Valley, the paleowind entered from the northwest, with storms coming from the south, and circulated clockwise around the …

You Can't Teach What You Don't Know And You Can't Lead Where You Won't Go: Professional Development As Artists For Elementary Educators, Katharina Joyce Watson

Theses and Dissertations

Elementary educators often lack the confidence and skill to teach visual arts to their students because they received very little, if any, formal training in what is a diverse and complex field of study. Teachers who lack confidence in a subject matter will potentially avoid teaching it. As a result, the early visual arts education of entire classrooms of elementary students can become neglected. Giving elementary educators the time to develop their own artistic process and acknowledging the value of educators' artistic voice can benefit teachers by building personal confidence, generating creative flow, providing knowledge about art, promoting a growth …

Efficient Fpga Soc Processing Design For A Small Uav Radar, Luke Oliver Newmeyer

Theses and Dissertations

Modern radar technology relies heavily on digital signal processing. As radar technology pushes the boundaries of miniaturization, computational systems must be developed to support the processing demand. One particular application for small radar technology is in modern drone systems. Many drone applications are currently inhibited by safety concerns of autonomous vehicles navigating shared airspace. Research in radar based Detect and Avoid (DAA) attempts to address these concerns by using radar to detect nearby aircraft and choosing an alternative flight path. Implementation of radar on small Unmanned Air Vehicles (UAV), however, requires a lightweight and power efficient design. Likewise, the radar …

Rubric Rating With Mfrm Vs. Randomly Distributed Comparative Judgment: A Comparison Of Two Approaches To Second-Language Writing Assessment, Maureen Estelle Sims

Theses and Dissertations

The purpose of this study is to explore a potentially more practical approach to direct writing assessment using computer algorithms. Traditional rubric rating (RR) is a common yet highly resource-intensive evaluation practice when performed reliably. This study compared the traditional rubric model of ESL writing assessment and many-facet Rasch modeling (MFRM) to comparative judgment (CJ), the new approach, which shows promising results in terms of reliability and validity. We employed two groups of raters”novice and experienced”and used essays that had been previously double-rated, analyzed with MFRM, and selected with fit statistics. We compared the results of the novice and experienced …

Lithofaces And Sequence Architecture Of The Upper Paradox Formation (Middle Pennsylvanian)In The Subsurface Northern Blanding Subbasin, Paradox Basin, Utah, Geoffrey William Ritter

Theses and Dissertations

THE PARADOX Basin is a northwest-southeast trending intracratonic basin that formedin southwestern Colorado, southeastern Utah and adjacent parts of Arizona and New Mexicoduring the late Paleozoic Era. During rise of the adjacent Uncompahgre Uplift (Ancestral RockyMountains) the rapidly subsiding basin was filled with over 2000 m of Permo-Pennsylvaniansediments. Stacked depositional sequences accumulated in three roughly parallel facies belts: anortheastern clastic belt (adjacent to uplift), a central salt and black shale belt, and asouthwestern carbonate belt. Over 400 million barrels of oil have been extracted from upperParadox (Desert Creek and Ismay) carbonates in the southern Blanding Subbasin (Greater AnethField) since 1956. …