Digital Commons Network^™

Greening Of Catalytic Processes Using First-Row Transition Metals For Atom Transfer Radical Addition And Transfer Hydrogenation, Gabrielle Pros

Electronic Theses and Dissertations

This work focused on “greening” catalytic processes, atom transfer radical addition (ATRA), which adds an alkyl halide across and alkene, and transfer hydrogenation/dehydrogenation, which reduces a carbonyl without needing direct H₂ gas. Part of “greening” of these processes is through using abundant first row metals, Cu and Ni for catalysis. One aim was to design new ligands which would be more active in these systems; the second was investigation of additives for catalyst regeneration to reduce the catalyst loading necessary for high yields.

The TPMA^* family was investigated in ATRA. Rate constants followed the expected trend, which increased …

Meteorological Information Extraction Algorithm For Ship Routing, Zhaokun Wei, Xinlian Xie, Ming Wei, Tiantian Bao

Journal of Marine Science and Technology–Taiwan

The meteorological environment plays an important role when optimizing ship routing. Therefore, with the goal of obtaining meteorological environmental data associated with ship routing, an algorithm that can accurately obtain environmental data around a rhumb route in a standardized common data form is proposed. A Mercator projection is a type of equal-angle projection, and a rhumb route is a straight line on a Mercator chart. Consequently, the linear equation for a rhumb route can be achieved using the point-slope form. Based on this linear equation, points with a regular spacing whose degree is determined by the longitudinal size of the …

Digital Tools In The Classroom: Measuring The Effectiveness, Jeff Carpenter

Current Issues in Emerging eLearning

The purpose of the study is to determine if, compared to traditional practice, digital practice increases student measuring accuracy on an authentic task. Therefore the study explores the relative efficacy of digital versus traditional practice for increasing student measurement skills in applied situations. Research tells us that students’ poor performance with measuring skills is directly related to lack of practice. To increase the ability to accurately use a ruler, Junior High, Intermediate and Middle Schools students require more time on task than they typically spend practicing this skill. Since more time is hard to come by in the classroom, educators …

Dynamic Response Analysis Of The Lifting Load System Of A Crane Ship In Irregular Waves, Xiao-Rong Yang, Qiu-Ming Gan, Yan-Hong Wang, Guang-Dong Wang

Journal of Marine Science and Technology–Taiwan

In this paper, the indirect time domain method is adopted to analyze the dynamic responses of a mooring crane ship. The motion equations of its lifting load system are derived from Lagrange's equations and the features of the coupling motion between the crane ship and its lifting load system are presented. The hydrodynamic coefficients of the crane ship are calculated on the base of 3D potential flow theory. The lumped-mass model is used to analyze the dynamic features of its mooring lines. The nonlinear features of the motion equations being taken into account, the displacements of the crane ship and …

Numerical Analysis Of Deep-Water Pipeline Abandonment And Recovery, Pan Gao, Bo-Wen Jin, Ji Zeng, Yi-Ting Zhan, Hui Zhou

Journal of Marine Science and Technology–Taiwan

Pipeline abandonment and recovery (A&R) is of great importance in offshore pipeline installation. A mathematical model of the A&R process is proposed based on the large deflection beam theory. To solve the model, an iteration process is adopted. The initial guess of the solution is obtained through the two-catenary approach, which significantly accelerates the iteration. A moving boundary technique is used to solve the governing equation of the suspended pipeline. With the proposed approach, the effects of the dominant parameters in the A&R process are studied. The cable length increases, and the maximum bending moment decreases, as the vessel moves …

The Role Of Occupational Therapy For Survivors Of Human Trafficking, Margaux Mariano

Student Capstone Papers

Human trafficking involves sex trafficking, labor trafficking, and trafficking of children. The needs of survivors of human trafficking are widespread due to the traumatic experiences they face. Concerns that may arise include decreased participation in meaningful activities in an individual's life, possibly due to anxiety, depression, suicidal ideation, memory loss, posttraumatic stress disorder, and social isolation. Individuals who have been subjected to human trafficking often experience occupational deprivation and occupational therapy has yet to establish its role in the recovery process for survivors. This capstone project consists of the process towards the development of an occupation-based, trauma-informed, evidence-based, and survivor-centered …

Early-Year Undergraduate Research Experiences: How Students Are Mentored, How Valuable They Find This Experience, And What Kinds Of Costs They Associate With It, Gaye D. Ceyhan

Dissertations - ALL

Undergraduate research has been considered as a high impact practice. Engaging in research in early college years are crucial to attracting and retaining students in research-related STEM careers. However, undergraduate research literature mostly focuses on the research experiences of students that are later in their undergraduate years. This dissertation is formed in an article-style format, which is a compilation of two separate research efforts to explore undergraduate students’ research experiences in their freshman and sophomore years. This article-style dissertation is part of a larger investigation into the academic and social experiences of high-achieving low-income undergraduate students. The context of the …

Intrapersonal And Organizational Predictors Of Burnout Among School Counselors, Kathryn Theresa Kozak

Dissertations - ALL

This study utilized hierarchical regression to examine the impact of practicing school counselors’ years of professional experience, master’s-level training, and work environment characteristics on their levels of occupational burnout. The specific training program variables under consideration included the number of school counseling courses completed, number of courses taught by faculty members with a school counseling identity, and degree of congruence between what was taught about the school counselor’s role during master’s-level training and participants’ actual practice. Work environment characteristics explored included caseload size, level of principal support, and assignment of non-counseling duties. Participants’ (n = 236) burnout levels were measured …

Implementing Ethics Into Artificial Intelligence: A Contribution, From A Legal Perspective, To The Development Of An Ai Governance Regime, Axel Walz, Kay Firth-Butterfield

Duke Law & Technology Review

The increasing use of AI and autonomous systems will have revolutionary impacts on society. Despite many benefits, AI and autonomous systems involve considerable risks that need to be managed. Minimizing these risks will emphasize the respective benefits while at the same time protecting the ethical values defined by fundamental rights and basic constitutional principles, thereby preserving a human centric society. This Article advocates for the need to conduct in-depth risk-benefit-assessments with regard to the use of AI and autonomous systems. This Article points out major concerns in relation to AI and autonomous systems such as likely job losses, causation of …

Generalized Ultrasonic Scattering Model For Arbitrary Transducer Configurations, Andrea P. Arguelles, Joseph A. Turner

Department of Mechanical and Materials Engineering: Faculty Publications

Ultrasonic scattering in polycrystalline media is directly tied to microstructural features. As a result, modeling efforts of scattering from microstructure have been abundant. The inclusion of beam modeling for the ultrasonic transducers greatly simplified the ability to perform quantitative, fully calibrated experiments. In this article, a theoretical scattering model is generalized to allow for arbitrary source and receiver configurations, while accounting for beam behavior through the total propagation path. This extension elucidates the importance and potential of out-of-plane scattering modes in the context of microstructure characterization. The scattering coefficient is explicitly written for the case of statistical isotropy and ellipsoidal …

Validity Study Of The R-Pla, A Resilience Scale For People Living With Hiv, Jinxiang Hu, Julianne M. Serovich, Monique J. Brown, Judy A. Kimberly, Yi-Hsin Chen

Faculty Publications

This study provides psychometric assessment of a resilience scale with a sample of women living with HIV. Baseline data were used from a longitudinal HIV disclosure study of 124 women aged between 18-63 collected between 2001 and 2004 in a large Midwestern city. The Rasch model was used to examine the psychometric properties of the resilience scale. Results indicated that the resilience instrument meets the Rasch model application assumptions. Evidence of validity suggested the resilience instrument demonstrated good item and person fit, as well as good item and person reliability. Most items showed measurement invariance across different age and racial …

Perinatal Propylthiouracil-Induced Hypothyroidism Impaired Motor Coordination In Adult Female Offspring, Miski A. Khairinisa, Yusuke Takatsuru, Izuki Amano, Michifumi Kokubo, Asahi Haijima, Wataru Miyazaki, Noriyuki Koibuchi

Pharmacology and Clinical Pharmacy Research

Thyroid hormone (TH) play crucial roles in the growth and development of brain. Efficiency of TH during the perinatal period results in severe mental and physical retardation, known as cretinism in humans. Animal models have largely focused on mild and severe hypothyroidism associated with deficits in body weight, developmental delays, and cognitive deficits. Although various behavioral analyses have been reported, the effect of perinatal hypothyroidism in adult female mice has not been clarified. The aim of this study was to examine whether propylthiouracil (PTU)-induced hypothyroidism could impair motor coordination in female offspring. We used C57BL/6j mice and divided them into …

Reconstruction Of Propeller And Complex Ship Hull Surface Based On Reverse Engineering, Guan Guan, Wen-Wen Gu1

Journal of Marine Science and Technology–Taiwan

To quickly obtain the digital model of ship surface for detection and redesign, a reconstruction method for propeller and ship surface is proposed. Three-dimensional point cloud data of ship hull was obtained by laser scanning technology and the cloud data was preprocessed by iterative closest point (ICP) algorithm and chord deviation method. Then the surface was reconstructed with traditional surface modeling method and fast surface modeling method. By comparing the reconstructed surface with the initial point cloud data, the error of the reconstructed model was obtained. The result shows that the reconstructed surface gains good smoothness and small error. With …

Natural Antidiabetic Of Tunjuk Langit (Helminthostachys Zeylanica) Rhizome Extracts, Fania E. Ridhasya, Hilwan Y. Teruna, Rudi Hendra, Muhammad Almurdani

Pharmacology and Clinical Pharmacy Research

The use of medicinal plants in treating diabetes mellitus is increasing in Indonesia. Plenty of plants from different regions may have anti-diabetic effect, including Helminthostachys zeylanica. This plant is commonly used as a traditional medicine to treat inflammation, cough, dysentery, and malaria in Talang Mamak tribe, Indragiri Hulu, Riau, however in China it is used to treat diabetic. Thus, we examined whether the extract of H. zeylanica originated from Riau have potential antidiabetic activity. We assessed the α-glucosidase inhibitory activity of the extract of H. zeylanica rhizome. The results showed the antidiabetic values of n-hexane, dichloromethane (DCM), ethyl acetate (EtOAc), …

A 100-M-Scale Modeling Study Of A Gale Event On The Lee Side Of A Long Narrow Mountain, Halie Xue, Jian Li, Tingting Qian, Hongping Gu

Plants, Soils, and Climate Faculty Publications

In this study, a gale event that occurred on the lee side of a long narrow mountain was investigated, together with the associated mountain flows, using a realistic-case large-eddy simulation (LES) that is based on the Weather Research and Forecasting Model. The mountain is located on the southeastern Tibetan Plateau, where approximately 58 gales occur annually, mostly in the afternoons during the winter season. Benefitting from realistic topography and high horizontal resolution as fine as 111 m, the LES can replicate features similar to the wind fields observed during the gale period. Investigation of the early morning wind structure over …

Strongly Coupled Fermions On The Lattice, Nouman Tariq Butt

Dissertations - ALL

Since its inception with the pioneering work of Ken Wilson, lattice field theory has come a long way. Lattice formulations have enabled us to probe the non-perturbative structure of theories such as QCD and have also helped in exploring the phase structure and classification of phase transitions in a variety of other strongly coupled theories of interest to both high energy and condensed matter theorists. The lattice approach to QCD has led to an understanding of quark confinement, chiral symmetry breaking and hadronic physics. Correlation functions of hadronic operators and scattering matrix of hadronic states can be calculated in terms …

Applications Of Elastic Modeling, Thermobarometry, And Thermal History Modeling To (Ultra)High-Pressure Metamorphic Rocks, Joseph Patrick Gonzalez

Dissertations - ALL

Subduction zones are tectonically active regions that produce seismicity and volcanism during plate convergence and ultimately recycle crustal material into the mantle. Since these regions dictate many global scale tectonic and geochemical processes (i.e. orogenesis, volatile flux into the mantle, etc.), it is important to understand the depth-temperature conditions of mineral reactions during the subduction-exhumation metamorphic cycle. (Ultra)high-pressure ((U)HP) metamorphic rocks, such as blueschists and eclogites, are formed during metamorphism of subducted crust and sediments along relatively cold geothermal gradients. (U)HP metamorphic rocks may be incorporated into the subduction zone accretionary wedge and exhumed, thereby providing a direct records of …

Development And Application Of Nmr Diffusometry And Relaxometry Methodologies To Study Organic-Inorganic Interactions At Nanomaterial Surfaces, Emily Grace Ripka

Dissertations - ALL

Colloidal nanomaterials like semiconductor quantum dots (QDs) have size-, shape-, and composition-dependent optoelectronic properties with applications ranging from photovoltaics, to sensing, to medical diagnostics and treatment. These materials also have very high surfaceto- volume ratios, with intricate surface chemistries which control nearly every aspect of their chemical, physical, and colloidal properties. The interaction of the surface with the environment is limited via capping the surface of the nanomaterials with a shell of organic capping molecules. The environment-dependent binding of this organic shell is thus an extremely important aspect of nanomaterial design, however the methodologies to probe these interactions in-situ are …

In Search Of A Framework For User-Oriented Data-Driven Development Of Information Systems, Tea Mijać, Mario Jadrić, Maja Čakušić

Economic and Business Review

Although iterative and continuous improvements are common in the design and development of contemporary information systems, some interesting research directions are arising from general trends towards user-oriented data-driven approaches. Since this is a relatively active research area, the paper aims to provide a brief overview of the main concepts and research directions and to define the setup and the context for the proposed user-oriented data-driven information systems development framework. Experts from the field of information systems are interviewed and their feedback is used to evaluate different aspects of the proposed framework.

Grass-Like Structured Mesoporous Carbon As An Acid Red 119 Dye Adsorbent, Yuni Krisyuningsih Krisnandi, Tania Priantini, Muhammad Faisal, Rika Tri Yunarti, Indah Revita Saragi, Jarnuzi Gunlazuardi

Makara Journal of Science

Grass-like structured mesoporous carbon was prepared by the soft-template method using triblock copolymer Pluronic F127, affording an organic–organic composite structure between phloroglucinol and formaldehyde. Thermogravimetric analysis revealed that the as-synthesized mesoporous carbon is stable to 900 °C, and X-Ray Diffraction (XRD) analysis confirmed the presence of carbon material structures at 2θ values of 22.020° and 42.420°. A hysteresis loop at relative partial pressures (P/Po) between 0.45 and 0.85 was observed in the N2 adsorption isotherm, indicating that the solid material exhibits mesoporous characteristics, with a homogeneous pore size distribution of 8.863 nm. Scanning Electron Microscope (SEM) images revealed that the …

Impact Of El Niño And El Niño Modoki Events On Indonesian Rainfall, Iskhaq Iskandar, Deni Okta Lestrai, Muhammad Nur

Makara Journal of Science

On an interannual time-scale, the Indonesian climate is strongly influenced by the dynamics of Indo-Pacific climate modes. This study aims to investigate the possible impact of different types of El Niño events, namely, typical El Niño and El Niño Modoki, on Indonesian rainfall variability. Seasonal composite analysis was used to evaluate the magnitude and significance level of the influence of El Niño on the rainfall variability over the Indonesian region. Typical El Niño (hereafter El Niño) has a stronger influence on Indonesian rainfall than the El Niño Modoki during boreal autumn in September, October, and November when the events almost …

A Mathematical Model Of Regulatory Mechanisms Of Hepatocytes And Hepatitis B, Mahruy Saidalieva, Mohiniso Baxromovna Hidirova, Abrorjon Makhamatsolievich Turgunov

Makara Journal of Science

The study of the functioning of hepatitis B viruses in liver cells using methods of mathematical modeling is considered one of today’s pressing issues. In this article, the domains of functional- differential equations in a mathematical model of regulatory mechanisms of hepatocytes interacting with hepatitis B viruses (HBV) are presented. Characteristic molecular genetic systems regulatory mechanisms of the interrelated activities of liver cells and HBV are analyzed. A series of computational experiments show that the “chaos” and “black hole” theories describe two of the more dangerous regimes. As a result of the analysis of the “chaos” regime, small regions with …

Estimating Carbon Flux From Optically Recording Total Particle Volume At Depths Below The Primary Pycnocline, Alexander B. Bochdansky, Robert B. Dunbar, Dennis A. Hansell, Gerhard J. Herndl

OES Faculty Publications

Optical instruments can rapidly determine numbers and characteristics of water column particles with high sensitivity. Here we show the usefulness of optically assessed total particle volume below the main pycnocline to estimate carbon export in two systems: the open subarctic North Atlantic and the Ross Sea, Antarctica. Both regions exhibit seasonally high phytoplankton production and efficient export (i.e., a strong biological pump). Total particle volumes in the mesopelagic (200-300 m) were significantly correlated with those in the overlying surface mixed layer (50-60 m), indicating that most particles at depth reflect export from the surface. This connectivity, however, is modulated by …

Copper-Nickel-Modified Boron-Doped Diamond Electrode For Co2 Electrochemical Reduction Application: A Preliminary Study, Prastika Krisma Jiwanti, Rani Puspitasari Aritonang, Imam Abdullah, Yasuaki Einaga, Tribidasari Anggraningrum Ivandini

Makara Journal of Science

CO2 electrochemical reduction (CO2ER) activity is known to be influenced by electrode materials. In this study, we report the fabrication of a copper-nickel-modified boron-doped diamond (CuNi-BDD) electrode using wet chemical seeding and electrodeposition. Annealing was performed to improve the stability of the modified electrode during elec-trolysis. Characterization of the modified BDD electrodes shows successful deposition without damage to the surface of the BDD support material. CO2ER was conducted with the CuNi-BDD electrode, which produces various important products including methanol, formic acid, CO, and CH4. Additionally, a different applied potential affected the product distribution. CO2ER was also conducted on the surfaces …

Exact Results For Scattering On Ultrashort Plane Wave Backgrounds, A Ilderton

School of Engineering, Computing and Mathematics

We give exact results for the emission spectra of both nonlinear Breit-Wheeler pair production and nonlinear Compton scattering in ultraintense, ultrashort duration plane wave backgrounds, modeled as delta-function pulses. This includes closed form expressions for total scattering probabilities. We show explicitly that these probabilities do not exhibit the power-law scaling with intensity associated with the conjectured breakdown of (Furry picture) perturbation theory, instead scaling logarithmically in the high-intensity limit.

Workability And Compressive Strength Development Of Self-Consolidating Concrete Incorporating Rice Husk Ash And Foundry Sand Waste – A Preliminary Experimental Study, Gritsada Sua-Iam, Natt Makul, Shanshan Cheng, Prakasit Sokrai

School of Engineering, Computing and Mathematics

No abstract provided.

A Domain Specific Language For Digital Forensics And Incident Response Analysis, Christopher D. Stelly

LSU New Orleans Theses and Dissertations

One of the longstanding conceptual problems in digital forensics is the dichotomy between the need for verifiable and reproducible forensic investigations, and the lack of practical mechanisms to accomplish them. With nearly four decades of professional digital forensic practice, investigator notes are still the primary source of reproducibility information, and much of it is tied to the functions of specific, often proprietary, tools.

The lack of a formal means of specification for digital forensic operations results in three major problems. Specifically, there is a critical lack of:

a) standardized and automated means to scientifically verify accuracy of digital forensic tools; …

A Hybrid And Scalable Error Correction Algorithm For Indel And Substitution Errors Of Long Reads, Arghya Kusum Das, Sayan Goswami, Kisung Lee, Seung Jong Park

Computer Science Faculty Research & Creative Works

Background: Long-read sequencing has shown the promises to overcome the short length limitations of second-generation sequencing by providing more complete assembly. However, the computation of the long sequencing reads is challenged by their higher error rates (e.g., 13% vs. 1%) and higher cost ($0.3 vs. $0.03 per Mbp) compared to the short reads. Methods: In this paper, we present a new hybrid error correction tool, called ParLECH (Parallel Long-read Error Correction using Hybrid methodology). The error correction algorithm of ParLECH is distributed in nature and efficiently utilizes the k-mer coverage information of high throughput Illumina short-read sequences to rectify the …

Fort Hays State University Tiger Weekly, December 20, 2019, University Relations

Tiger Weekly Newsletters

No abstract provided.

A Drive To Driven Model Of Mapping Intraspecific Interaction Networks., Libo Jiang, Jian Xu, Mengmeng Sang, Yan Zhang, Meixia Ye, Hanyuan Zhang, Biyin Wu, Youxiu Zhu, Peng Xu, Ruyu Tai, Zixia Zhao, Yanliang Jiang, Chuanju Dong, Lidan Sun, Christopher H. Griffin, Claudia Gragnoli, Rongling Wu

Division of Endocrinology, Diabetes and Metabolic Diseases Faculty Papers

Community ecology theory suggests that an individual's phenotype is determined by the phenotypes of its coexisting members to the extent at which this process can shape community evolution. Here, we develop a mapping theory to identify interaction quantitative trait loci (QTL) governing inter-individual dependence. We mathematically formulate the decision-making strategy of interacting individuals. We integrate these mathematical descriptors into a statistical procedure, enabling the joint characterization of how QTL drive the strengths of ecological interactions and how the genetic architecture of QTL is driven by ecological networks. In three fish full-sib mapping experiments, we identify a set of genome-wide QTL …