370 Works

re3data Webinar and DataCite: En Avant!

Michael Witt
The inaugural meeting of the DataCite re3data Working Group was convened in Paris on September 20th at the offices of the International Council for Science (ICSU). Co-chairs Michael Witt and Frank Scholze gave the background and history of Databib...

Clinical Analytics and Personalized Medicine

Chih-Hao Fang
The increasing volume and availability of Electronic Health Records (EHRs) open up opportunities for computational models to improve patient care. Key factors in improving patient outcomes include identifying patient sub-groups with distinct patient characteristics and providing personalized treatment actions with expected improved outcomes. This thesis investigates how well-formulated matrix decomposition and causal inference techniques can be leveraged to tackle the problem of disease sub-typing and inferring treatment recommendations in healthcare. In particular, the research resulted...

NUTRIENT ACCUMULATION AND PARTITIONING BY MODERN CORN HYBRIDS UNDER IN-SEASON SULFUR AND POTASSIUM APPLICATION

Garrett S Verhagen
Few contemporary studies have examined nutrient accumulation and partitioning of modern corn (Zea mays L.) hybrids grown under in-season sulfur (S) and potassium (K) nutrient management. A fertilizer x hybrid field experiment was conducted during the 2020 and 2021 growing seasons in West Lafayette, Indiana to (1) determine the efficacy of in-season fertilizer management as a strategy to increase grain yield among different modern hybrids, (2) determine the extent to which nutrient harvest index (NutHI)...

DEVELOPMENT OF A SYNTHETIC METHOD FOR 2-TETRAZENES AND EXAMINATION OF THE MASS SPECTROMETRIC BEHAVIOR OF IONIZED 2-TETRAZENES AND ASPHALTENE MODEL

Hao-Ran Lei
2-Tetrazens are often used as high energy-density materials. Only a few synthetic methods exist for making them. Further, their structure-property relationships remain largely unexplored. Asphaltenes are usually a complex mixture found in the heaviest fraction of heavy crude oil. Their structural characterization and understanding have become a pertinent task for petroleum industry around the world. Mass spectrometry is a powerful analytical tool for the detection and characterization of unknown compounds even in complex mixtures. It...

General Resource Management for Computationally Demanding Scientific Software

Xinchen Guo
Many scientific problems contain nonlinear systems of equations that require multiple iterations to reach converged results. Such software pattern follows the bulk synchronous parallel model. In that sense, an iteration is a superstep, which includes computation of local data, global communication to update data for the next iteration, and synchronization between iterations. In modern HPC environments, MPI is used to distribute data and OpenMP is used to accelerate computation of each data. More MPI processes...

Assessment of Seed Quality of Selected African Leafy Vegetables Produced in Western Kenya using informal and semi-formal seed systems

Christine Ndinya, Fekadu Dinssa, James E. Simon, Naman Nyabinda, Norah Maiyo, Stephen Weller, Martins Odendo, Eunice Onyango, Michael Mwangi & Noel Makete

Improving Income and Nutrition of Smallholder Farmers in Eastern Africa using a Market-First Science-Driven Approach to Enhance Value Chain Production of African Indigenous Vegetables

James E. Simon, Stephen Weller, Daniel Hoffman, Ramu Govindasamy, Xenia Morin, Emily V. Merchant, Fekadu F. Dinssa, Emil Van Wyk, David Byrnes, Martins Odendo, Christine Ndinya, Henry H.A. Mvungi, Justus Ochieng, Norah Maiyo, Mebelo Mataa, John Shindano, Himoonga Bernard Moonga, J. Steve Yaninek, Qingli Wu, Naman Nyabinda & Victor Afari-Sefa

How Long is Forever in the Laboratory? Three Implementations of an Infinite-Horizon Monetary Economy

Janet Hua Jiang, Daniela Puzzello & Cathy Zhang
Standard monetary models adopt an infinite horizon with discounting. Testing these models in the lab requires implementing this horizon within a limited time frame. We compare three approaches to such an implementation and discuss their relative advantages.

Superintendent Perceptions of Open Enrollment Transfer Policies In Indiana after Fourteen Years of Implementation

Sean Raymond Galiher
School choice has expanded during the modern school choice movement and students in Indiana can now choose from several school options including public schools, charter schools, virtual schools, or participate in the Indiana Choice Scholarships program and attend a parochial school. The potential for increased educational stratification across different demographic groups is a concern amongst policy makers and stakeholders committed to providing equitable access to educational opportunities for all. This phenomenological qualitative case study examined...

EFFECTS OF THE METHOD OF PREPARATION ON THE OPTICAL PROPERTIES AND STABILIZATION OF SUSPENSIONS AGAINST SEDIMENTATION OF AQUEOUS DISPERSIONS OF A DOUBLE-CHAIN CATIONIC SURFACTANT

An-Hsuan Hsieh
In the practical applications of colloidal dispersions and suspensions, such as inks, paints, and food industry, the suspended particles must be stabilized, and remain well-dispersed for long times. Particles which are more dense than the suspending media may sediment rapidly, even with no agglomeration occurring, under many conditions of size and density difference. Then, a dispersant would be necessary for stabilization of particle suspensions against both agglomeration and sedimentation, while the suspensions should remain flowable...

Instability and Transition on Slender Cones under Fully Quiet Mach-6 Flow

Kathryn A. Gray
Experiments were performed in the Boeing/AFOSR Mach-6 Quiet Tunnel on sharp, slender straight cones at zero degrees angle of attack. These long models allow the second mode to grow to large amplitudes without the need for introduced perturbations and without the presence of the Gortler instability. PCB pressure sensors and global thermal imaging are used to study the development of the second-mode instability. Transition was measured on both the 2.5 degree and 3 degree half-angle...

Skeptical Theism, God, and Evidence

Perry C Hendricks
Skeptical theism is an important position (or set of positions) that—if true—has significant implications in the philosophy of religion regarding the epistemic status of theism and atheism. Broadly speaking, skeptical theists are theists who are skeptical about the ability of humans to discern, by certain methods, the probability of God permitting certain states of affairs. In this dissertation, I argue in favor of two types of skeptical theism and consider their implications. In Chapter 1,...

HEIGHT PROFILE MODELING AND CONTROL OF INKJET 3D PRINTING

Yumeng Wu
Among all additive manufacturing processes, material jetting, or inkjet 3D printing, builds the product similar to the traditional inkjet printing, either by drop-on-demand or continuous printing. Aside from the common advantages as other additive manufacturing methods, it can achieve higher resolution than other additive manufacturing methods. Combining its ability to accept a wide range of functional inks, inkjet 3D printing is predominantly used in pharmaceutical and biomedical applications. A height profile model is necessary to...

Training Health Service Psychologists for International Engagement: Perspectives for Training Programs

Brittany J Wright
As psychologists continue to engage the growing diversity within the United States and around the world, there is an imperative need for psychological services that are specific to cultural needs and integrate relevant sociohistorical and community factors. Currently, ethnocentrism in psychological interventions, research, and graduate training limit psychologists’ international engagement and perpetuate a focus on U.S. psychology. For graduate programs in health service psychology (i.e., clinical, school, and counseling psychology), there is a dearth of...

A Comprehensive Framework for Quality Control and Enhancing Interpretation Capability of Point Cloud Data

Yi-chun Lin
Emerging mobile mapping systems include a wide range of platforms, for instance, manned aircraft, unmanned aerial vehicles (UAV), terrestrial systems like trucks, tractors, robots, and backpacks, that can carry multiple sensors including LiDAR scanners, cameras, and georeferencing units. Such systems can maneuver in the field to quickly collect high-resolution data, capturing detailed information over an area of interest. With the increased volume and distinct characteristics of the data collected, practical quality control procedures that assess...

A Comprehensive Framework for Quality Control and Enhancing Interpretation Capability of Point Cloud Data

Yi-chun Lin
Emerging mobile mapping systems include a wide range of platforms, for instance, manned aircraft, unmanned aerial vehicles (UAV), terrestrial systems like trucks, tractors, robots, and backpacks, that can carry multiple sensors including LiDAR scanners, cameras, and georeferencing units. Such systems can maneuver in the field to quickly collect high-resolution data, capturing detailed information over an area of interest. With the increased volume and distinct characteristics of the data collected, practical quality control procedures that assess...

PROCESS INTENSIFICATION THROUGH CONTROL, OPTIMIZATION, AND DIGITALIZATION OF CRYSTALLIZATION SYSTEMS

Wei-Lee Wu
Crystallization is a purity and particle control unit operation commonly used in industries such as pharmaceuticals, agrochemicals, and energetics. Often, the active ingredient’s crystal mean size, polymorphic form, morphology, and distribution can impact the critical quality attributes of the final product. The active ingredient typically goes through a series of process development iterations to optimize and scale-up production to reach production scale. Guided by the FDA, the paradigm shift towards continuous processing and crystallization has...

EXPERIMENTAL STUDY OF LUBRICANT DROPLETS IN A ROTARY COMPRESSOR AND OPTICAL DIAGNOSTICS OF EVAPORATION PROCESS

Puyuan Wu
Part I studies the lubricant sprays and droplets in a rotary compressor. Air conditioning (AC) systems are now widely used in residential and commercial environments, while the compressor is the most important element in the AC system, and rotary compressors are often used in split AC appliances, whose number is estimated to reach 3.7 billion in 2050. In a rotary compressor, the lubricant oil atomizes into small droplets due to the differential pressure in and...

Expectations for what \"counts\" as an engineering career and how career decisions are made

Jacqueline A Rohde
This dissertation consisted of a mixed-methods investigation into expectations about what “counts” as an engineering career and how individuals make decisions about their futures. Presented as a set of three independent but closely related studies, I examined the ways that engineering students, alumni, and educators think and talk about careers and career decision-making. This work focused not only on the content of participants’ experiences, but also the extent to which their claims may reflect or...

Impact Fragmentation

Sean Evan Wiggins
While hypervelocity impacts are ubiquitous throughout the solar system and have received decades of research, the dynamic fragmentation that occurs during an impact has received relatively little attention. This is made more troublesome by the fact that, by volume, more material in the target is altered by the tensile stresses of the rarefaction wave that relieves the pressure of the shock wave, compared to the amount excavated by the impact itself. This tensionally affected material...

MODAL SIGNS AND COOCCURRING NONMANUAL MARKERS IN TURKISH SIGN LANGUAGE (TID)

Serpil Karabuklu
Modal notions have been an intriguing topic in terms of capturing their crosslinguistic behaviors which have been analyzed as quantifiers (Hacquard, 2006; Kratzer, 1977), free choice items (Rullmann et al., 2008), or degrees (Lassiter, 2017). These typological patterns become more interesting when the simultaneous nature of sign languages has been added to the typology. By adding another dimension to the crosslinguistic patterns, sign languages have been reported to have different realizations for modals. Some of...

A continuum model for milled corn stover in a compression feed screw

Abhishek Paul
Controllable continuous feeding of biomass feedstock in a biorefinery is critical to upscaling current ethanol conversion techniques to a commercial scale. Mechanical pretreatment of biomass feedstock performed using a compression feed screw (CFS) improves the ethanol yield but is subject to flowability issues, especially the plugging of biomass. The mechanical behavior, and hence, the flowability of biomass feedstock, is strongly affected by several factors, including preparation method, moisture content, physical composition, and particle size distribution....

Transition-metal catalyzed cyclization reactions

Pedro De Andrade Horn
A historically important reaction, the Ueno-Stork reaction promotes, through the use of toxic organotin species, the cyclization of a haloacetal onto an alkene generating bicyclic acetals. This reaction has been used over the years in several total syntheses of biologically relevant natural products, especially the prostaglandin class of natural products. Herein, will be described the development of a novel nickel-catalyzed Ueno-Stork cyclization reaction, which no toxic organotin and radical promoters are used, and instead a...

A Graybox Defense Through Bootstrapping Deep Neural Network

Kirsen L Sullivan
Building a robust deep neural network (DNN) framework turns out to be a very difficult task as adaptive attacks are developed that break a robust DNN strategy. In this work we first study the bootstrap distribution of DNN weights and biases. We bootstrap three DNN models: a simple three layer convolutional neural network (CNN), VGG16 with 13 convolutional layers and 3 fully connected layers, and Inception v3 with 42 layers. Both VGG16 and Inception v3...

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