Digital Commons Network^™

Effects Of Bending And Re-Bending On Mechanical Properties Of Locally-Manufactured Steel Rebars, Patrick W. Waruhiu, Simon I. Marandu, Mussa I. Mgwatu

Tanzania Journal of Science

Steel rebars experience deformation when subjected to bending and re-bending operations. Subsequently, their microstructures are impaired thus affecting the mechanical properties and leading to failure. This study establishes the effects of bending and re-bending the steel rebars on the mechanical properties. Experiments were conducted to determine the effects of bending and re-bending of the steel rebars. Testing was conducted on Ten virgin and Thirty specimens which were bent and re-bent at 45º, 90º, and 180º, and followed by tensile tests. Yield strength, ultimate tensile strength, elongation, and ultimate tensile strength to yield strength ratio (Rm/Re), were recorded. Results showed the …

Modelling The Combined Use Of Long-Lasting Insecticidal Nets And Insecticides Zooprophylaxis Against The Resilience Of Anopheles Arabiensis For Effective Malaria Control, Watson Levens

Tanzania Journal of Science

Malaria is a significant public health concern, especially in tropical regions. It remains endemic in many areas where malaria mosquitoes are prevalent. This study investigates the viability of insecticide zooprophylaxis (IZ) in conjunction with Long Lasting Insecticidal Nets (LLINs) as a strategic approach to combat malaria transmission, particularly in regions dominated by zoophagic vectors. Through the presentation and analysis of a mathematical model that integrates IZ and LLINs for the control of Anopheles arabiensis (An. arabiensis), the research underscores IZ's role in reducing zoophagic vector populations and enhancing malaria control efforts. Notably, the study reveals that achieving comprehensive coverage of …

Green And Blue Water Footprints Of Major Crops In The Wami/Ruvu Basin, Tanzania: Implications For Water Scarcity And Sustainability, Benson Hm Lazaro, Martine M. Hagai, Rubhera Ram Mato

Tanzania Journal of Science

Accurate estimation of the blue and green water requirements of the various crops cultivated in a water basin is essential for planning specific plant/crop irrigation schedules. In this study, the crop water requirements of the major crops grown in the Wami/Ruvu basin were determined using the FAO-CROPWAT model based on meteorological parameters: monthly maximum and minimum temperature, wind speed, mean relative humidity, sunshine hours, rainfall data, and effective rainfall for 23 hydro-meteorological stations distributed in the study area. The studied crops are rice, maize, beans, tomatoes, and sugarcane. The crop reference evapotranspiration (ETo) and actual evapotranspiration (ETc) for each crop …

Characterizing Brain And Skull Mechanics In The Minipig Using Magnetic Resonance Elastography, Shuaihu Wang

McKelvey School of Engineering Graduate Student Theses & Dissertations

Computational models and simulation are important tools to investigate the mechanisms underlying traumatic brain injury (TBI); their accuracy depends strongly on accurate model parameters, including the mechanical properties of the brain and its interactions with the skull. However, most existing TBI modeling studies are performed using material properties derived from animal tissue obtained after death. Magnetic resonance elastography (MRE) provides a non-invasive method for estimating the mechanical properties of soft tissue. The overall objective of this thesis is to characterize the biomechanical properties of brain tissue and brain-skull interface in the minipig by using MRE. This was achieved through pursuit …

Inference For Time Series In Change Points And Statistical Learning, Jiaqi Li

Arts & Sciences Graduate Student Theses and Dissertations

This study aims to develop a comprehensive framework for inference theory in time series, with a focus on change-point detection and online learning. First, we introduce an $\ell^2$-based inference approach for multiple change-point detection in high-dimensional time series, which targets dense or spatially clustered signals by a novel Two-Way MOSUM (moving sum) test statistic. We derive the limiting distribution of this $\ell^2$-aggregated statistic by extending the high-dimensional Gaussian approximation to non-stationary spatial-temporal processes. Simulation exhibits promising performance of our test in detecting non-sparse weak signals, and the application to COVID-19 analysis shows the real-world relevance of our method. Next, we …

Moderating Effect Of Secondary Victimization On The Relationship Between Resilience And Sexual Assault Coping Self-Efficacy, Jamie Layton

Clinical Psychology Dissertations

Sexual assault is a prevalent public health concern that effects thousands of people every year. How each of these individuals responds is different. There are multiple factors that can impact someone’s response to sexual assault, one of which is resilience, and another is secondary victimization. Legal advocacy programs can be used to help reduce secondary victimization and increase sexual assault coping self-efficacy, while controlling for age and race. This dissertation examines the way that secondary victimization moderates the relationship between resilience and sexual assault coping self-efficacy. Participants were at least 18 years old, a cisgender woman, English speaking, and a …

Improving Technology For Producing Complex Fertilizer From Low-Grade Phosphorites Of The Central Kyzylkum, A.Zh. Allamuratova, A.U. Erkaev, A.M. Reimov, Saparbay Kazakhbaev, Dilshodbek Kurbiyazov

Chemical Technology, Control and Management

The methods of nitric acid processing of phosphate raw materials are analyzed. A technology has been developed for the nitric acid processing of phosphate raw materials into nitrogen-phosphorus fertilizer with the implementation of the process in a condensed pulp by adding sulfuric acid. A technology for producing complex fertilizers with a wide range of N:P₂O₅:K₂O ratios with improved physico-chemical parameters due to the introduction of various potassium salts into the process is proposed.

Algorithms For Structural Synthesis Of Control Systems For Dynamic Objects Under Conditions Of Unmeasurable Disturbances, Husan Zakirovich Igamberdiev, Uktam Farkhodovich Mamirov, Bunyod Mamurjon Ugli Buronov

Chemical Technology, Control and Management

The paper talks about ways to use inverse dynamic models to structure a control system for moving objects when disturbances are not measured. To solve the main problems that arise when implementing the inverse dynamic model method, methods for synthesizing inverse systems with given dynamic characteristics are used. The solution to this problem is obtained based on the theory that dynamic observers are invariant to unmeasured input influences. We broke down the matrix operator on the right into elementary orthogonal rotation matrices and on the left into permutation matrices to get a stable answer to the equation of the current …

Artificial Neural Network Based Grain Moisture Measuring Device, Erkin Eljaev, Shohrux Nurali O‘G‘Li Narzullayev, Elyor Faxriddinovich Khudoyberdiev

Chemical Technology, Control and Management

To date, the intellectualization of solving technical issues in managing, controlling, and measuring technological processes in all branches of industrial production is considered an urgent task. In this regard, a class of intelligent devices and sensors has emerged. Intelligent devices and sensors differ from their analog counterparts in that they have functions such as automatic adjustment of the measurement range, self-calibration, data processing, and decision-making. The article discusses the development of intelligent measuring instruments based on a capacitive transducer for measuring the moisture content of grain and grain products.

Advancing Mobile Sensing In Dynamic Environments, Weichen Wang

Dartmouth College Ph.D Dissertations

This thesis presents a comprehensive exploration of enhancing mobile sensing capabilities to address various aspects of human behavior, mental health, personality, social functioning and beyond. We redesign the StudentLife app to improve its sensing efficiency and dependability, enabling support for multi-year-long studies. By adopting new app design, this study addresses the technical challenges of continuous sensing and enhances system robustness. The work is organized into several key studies that collectively aim to expand the scope of mobile sensing in diverse and complex environments.

The first study broadens the scope of mobile sensing to assess personality traits, exploring the potential of …

Relationship Of Stress And Other Factors With Emotional Eating Among Adolescents In Depok, Muthia Syifa Rahmadina, Asih Setiarini

Indonesian Journal of Public Health Nutrition (IJPHN)

Emotional eating is an overeating behavior as a coping mechanism for negative emotions that emerges in adolescence. Emotional eating causes obesity, eating disorders, and non-communicable diseases. This study aims to determine the relationship between stress, body image, peer influence, parental rearing styles, social media use, sex, sleep quality, and emotion regulation with emotional eating among adolescents at senior high school in Depok. This cross-sectional quantitative study was conducted online in March 2022. The samples were grade X and XI students from senior high school in Depok who were chosen by using purposive sampling techniques (n=174). Chi X2 test and Mann …

Sugar-Sweetened Beverages Consumption Based On Individual And Environmental Factors Among The Faculty Of Public Health Universitas Indonesia’S Students In 2023, Safira Diva Aranis, Wahyu Kurnia Yusrin Putra, Asih Setiarini, Teguh Jati Prasetyo

Indonesian Journal of Public Health Nutrition (IJPHN)

Sugar-sweetened beverages (SSB) are beverages that contain added sugars. Excessive consumption of SSB can have an impact on health. Some of the effects caused by SSB include obesity, fatty liver, type II diabetes, hypertension, heart disease, nutritional deficiencies, and dental caries. This research aims to determine the differences in the proportion of SSB consumption based on individual and environmental factors among students of the Faculty of Public Health UI (FPH UI) in 2023. This study uses a cross sectional design with a sample size of 194 individuals. The researcher collected data including respondent’s identities, habits of reading food labels, knowledge …

The Differences In Maternal Clean And Healthy Living Behavior In The Incidence Of Stunting In Yogyakarta, Shafa Ramadhita, Anindhita Syahbi Syagata, Nor Eka Noviani

Indonesian Journal of Public Health Nutrition (IJPHN)

An indirect cause of stunting is maternal behavior. Moreover, good nutritional knowledge relates to good nutritional behaviors. Maternal clean and Healthy Living Behavior (PHBS) in daily life can reduce the risk of infectious diseases and be role models for children in implementing their future health behavior. The study aims to investigate the differences in PHBS of mothers in the incidence of stunting ages 24-59 months in the Minggir Primary Health Center working area. The cross-sectional approach of this research was conducted from March to April 2023. The subjects of this study were 69 respondents selected by cluster random sampling. The …

Factors Associated With Wasting In Toddlers Aged 6 – 59 Months At Cimpaeun Village, Depok City, West Java, Indonesia In 2023, Early Vici Azmia, Triyanti Triyanti

Indonesian Journal of Public Health Nutrition (IJPHN)

The prevalence of wasting under five in Indonesia in 2022 is 7.7%; according to WHO, this wasting problem is a serious public health problem. Wasting is a nutritional problem in toddlers that has an impact on morbidity and mortality. The research objective was to determine the factors associated with wasting in toddlers aged 6–59 months in Cimpaeun Village in 2023. The dependent variable is wasting, and the independent variables are birth weight, history of fever, diarrhea, acute respiratory infection, energy intake, carbohydrate intake, protein intake, fat intake, mother’s age, pregnancy, mother’s education level, mother’s nutritional knowledge, and family income. This …

The Relationship Of Energy And Nutrient Intake From Eating Out And Eating At Home On Blood Hemoglobin Levels In Adolescents, Adinda Aisyah Putri, Khoirul Anwar

Indonesian Journal of Public Health Nutrition (IJPHN)

Eating out of home is a common practice in adolescents. The high frequency of eating out of home characterized by higher intakes of energy, fats, sugar, and sodium. anemia, especially iron deficiency anemia which is characterized by blood hemoglobin levels, is still a nutritional problem in Indonesia in adolescents which can have an impact on adolescent health. The aim of this study was to determine the relationship between eating out and hemoglobin levels in adolescents in Jakarta. This research is an observational study with a cross sectional research design. The subjects of this research were female students aged 15-17 years. …

Papaya Maturity Detection Based On Multi-Target Sampling And Improved Mask R-Cnn, Qi Guohong, Zhang Yunlong, Su Man

Food and Machinery

Objective: Improve the accuracy and robustness of papaya ripeness detection. Methods: A method of papaya ripeness detection based on multi-target sampling and improved Mask R-CNN was proposed. In the process of data expansion, the method introduced multi-object sampling technology to generate enhanced images from small data sets taken under controlled conditions, which was conducive to extending the proposed method to data sets with complex features of actual papaya images. The effectiveness and robustness of the proposed method were verified by means of average accuracy, accuracy, accuracy-recall curve and calculation time, and the results of papaya ripeness detection effect were compared …

Family Values And Verbal Bullying Among Secondary School Adolescents In Uyo Local Education Committee, Gertrude Jeremiah Udoh

Jurnal Kajian Bimbingan dan Konseling

This study was to determine the relationship between family values and verbal bullying among secondary school adolescents in Uyo Local Education Committee. Two research questions were raised, and two hypotheses formulated and tested at .05 level of significant. A correlational survey design was adopted while the population of the study comprised all 6,613 senior secondary Two (SS2) students in the fifteen (15) public secondary schools in the study area. A sample size of 378 senior secondary two (SS2) was selected for the study using Taro Yamane sampling formulae. To get adequate sampled schools, balloting method of random sampling was used …

Determinant Factors Of Academic Stress: A Study Of First-Year University Students In Indonesia, Ade Herdian Putra, Zadrian Ardi

Jurnal Kajian Bimbingan dan Konseling

Academic stress can reduce academic performance in first-year university students. Based on theoretical studies and previous research, three factors are predicted to influence academic stress: academic self-efficacy, life satisfaction, and happiness. This study analyzes the correlation of academic self-efficacy, life satisfaction, and happiness with first-year university students' academic stress. This research uses a quantitative approach with correlational methods and path analysis. The participants in this research were 720 first-year university students in Indonesia. The research instruments used were the Academic Self-Efficacy Scale, Life Satisfaction Scale, Happiness Scale, and Academic Stress Scale. Research data was collected online and then analyzed using …

Building Software At Scale: Understanding Productivity As A Product Of Software Engineering Intrinsic Factors, Gauthier Ingende Wa Boway

Master's Theses

During our education at KSU, we have learned about various factors that affect productivity such as schedule, budget, and risks, but those are often controlled outside of what we could learn as software engineering principles, patterns, or practices. On top of that, other off-work factors such as health conditions, emotional distress, or political climate, just to name a few, could drastically affect the productivity of a software engineering team. We see a demarcation between those factors that affect productivity in software engineering but are not inherent to the discipline itself, which we call resistance factors, and the factors that are …

What Is Trauma?: From Science To Social Justice, Judith Fleetwood Carlisle

Arts & Sciences Graduate Student Theses and Dissertations

In recent years, the term “trauma” has become increasingly controversial. Many of these controversies revolve around the definition of trauma, and the way that this definition varies across contexts. What kinds of experience can plausibly be considered “traumatic”? In some contexts, the standards are incredibly permissive, while others are much more restrictive. These different ways of understanding “trauma” prompts an important question: Who has the authority to define trauma? In other words, who decides which conception of trauma is the most “legitimate” – who decides when an experience is or is not traumatic? My project attempts to answer these questions …

Emotions That Feel Bad Are Bad: An Investigation Into The Purportedly Positive Parts Of Negative Emotions, Christopher Colacchia

Arts & Sciences Graduate Student Theses and Dissertations

It has grown increasingly common to hold that some emotions that feel bad can be important to our well-being. This idea appears in “common sense” views, such as the view that it is important to feel grief after the loss of a loved one, as well as in sustained philosophical defenses, such as those written defending the value of anger for securing justice. I seek to push back on this idea. After preliminary clarifications, I defend the claim that an emotion’s feeling bad provides a prima facie reason to assign it a negative impact on our well-being on every plausible …

Dimerization Of The Fluoride Channel Fluc In Membranes, Melanie Ernst

Arts & Sciences Graduate Student Theses and Dissertations

Many ion channels are multi-subunit complexes where oligomerization is an obligatory requirement for function as the binding axis forms the charged permeation pathway. However, the mechanisms of assembly within the membrane are largely unknown. Are ion channel complexes thermodynamically stable, and do they participate in dynamic equilibrium oligomerization reactions in membranes? If so, what are the molecular factors governing these reactions? In this thesis, I present several key advances in the study of ion channel oligomerization in membranes through quantitative studies of the dimerization equilibrium reaction of the inverted topology, homodimeric fluoride channel Fluc in lipid bilayers. Chapter 1 provides …

Strategies Employed By School Social Workers In Virginia To Help Children Cope With Parental Death, Jamitta Covington

Walden Dissertations and Doctoral Studies

Research has indicated that school social workers employ a variety of strategies or interventions that affect the child’s adjustment in school. The psychological, physical, and social issues impacting children after the death of a parent can have long term effects on their development. However, there is a lack of knowledge regarding strategies that provide support for children’s adjustment to the grief process following a parent’s death. The purpose of this generic qualitative study was to identify strategies to improve, enhance, and contribute to social work practice. The study was guided by Kubler-Ross’s grief theory, ecological systems theory, and assumptions of …

Using Nurse-Assisted Telemedicine To Reduce Healthcare System Utilization By Rural Congestive Heart Failure Patients, Melissa Diehl Weidner

Walden Dissertations and Doctoral Studies

Congestive heart failure (CHF) is among the most common reasons for emergency room utilization and hospitalizations in those over age 65. With the rapidly aging population in the United States, the number of CHF patients is projected to continue to rise, disproportionately affecting rural communities. This research study evaluated an innovative nurse-led telemedicine program developed by one rural healthcare system to address the care and economic influence of rural CHF care. The purpose of this causal comparative analysis was to determine the impact a nurse-assisted telemedicine program had on the number of emergency room visits and hospital admissions for CHF …

Validity And Reliability Of Self-Concept Instrument Using Rasch Model, Meyliani Latifah, Ipah Saripah, Dodi Suryana, Yaya Sunarya

Jurnal Kajian Bimbingan dan Konseling

The development of instruments designed to assess student self-concept is crucial. This understanding of self-concept is based on the premise that it is a dynamic and ever-evolving construct. The concept of self-concept is initially conceived as a unidimensional structure but subsequently evolves into a multidimensional construct. The present study assesses the validity and reliability of the newly developed self-concept instrument. In Indonesia, there is a paucity of research that employs the Rasch Model to examine self-concept instruments, particularly in the context of the junior high school population. The objective of this study was to analyze the self-concept instrument using the …

Resilience, Self-Efficacy, Openness To Change, And Innovativeness Of Msme Owners: A Quantitative-Qualitative Integration Before, During, And After The Covid-19 Crisis, Imelda T. Angeles

The South East Asian Journal of Management

Research Aims: Micro, small, and medium-sized enterprises (MSMEs) have consistently demonstrated their resilience in the face of economic challenges, particularly during crises. This study delves into how the experiences of MSMEs before, during, and after the COVID-19 crisis have translated into resilience, self-efficacy, openness to change, and innovativeness as they responded to the unprecedented challenges posed by the pandemic.

Design/Methodology/Approach: This mixed-methods study combines the quantitative analysis of the characteristics of MSME owners with their narratives of their experiences during the COVID-19 crisis, translating adversity into an opportunity.

Research Findings: The integrated results showed how the quantitative-qualitative insights enabled a …

Leadership Styles, Self-Efficacy, And Innovative Work Behaviour Of Software Developers, Win Moe Moe Kyaw, Aye Thanda Soe

The South East Asian Journal of Management

Research Aims: The primary aims of this study involve examining the effect of leadership styles on self-efficacy and the effect of self-efficacy on innovative work behaviour.

Design/Methodology/Approach: Quantitative research was conducted by collecting data from 242 randomly selected software developers in four software development companies in Yangon using structured questionnaires. Regression analysis was used to attain the research objectives.

Research Findings: The results showed that transactional and ambidextrous leadership styles have a significant effect on increasing the self-efficacy of software developers. This study also revealed that self-efficacy is an antecedent of the innovative work behaviour of software developers.

Theoretical Contribution/Originality: …

Direct Precipitation Of Siderite In Ferruginous Environments, A Grengs, G Ledesma, Y Xiong, S Katsev, S W. Poulton, E D. Swanner, C Wittkop

Faculty Publications

Siderite (FeCO 3 ) is often assumed to precipitate from dissimilatory reduction of Fe-(oxyhydr)oxides, but geochemical and mineralogical analyses from ferruginous (anoxic, Fe-rich) Canyon Lake, USA, suggest Fe-carbonate represents a direct early precipitate unrelated to substantial oxide burial.X-ray absorption near edge structure (XANES) spectroscopy of sediment trap materials and an anoxic sediment core indicated a mixture of Fe(II) and Fe(III) in water column particulates and ferruginous surface sediments, while all Mn phases were reduced.About 60 cm below the sediment-water interface, Fe-Mn carbonates were detected by X-ray diffraction and XANES, while Fe extended X-ray absorption fine structure (EXAFS) spectra were best …

Putting A Slam On Alcohol Violators Through Dram- How The State Of Ohio Can Improve The Day-To-Day Safety Of Its Residents Through Dram Laws, Steven Iwanek

Honors Projects

In the realm of legal frameworks governing the service and consumption of alcohol, Dram Shop Liability Laws play a pivotal role in holding establishments accountable for the consequences of alcohol-related incidents. These laws, known as dram laws, vary across states, delineating the responsibilities of alcohol servers and establishments in preventing the overconsumption of alcohol and the resultant harm. This examination delves into a comprehensive background of dram laws, particularly focusing on their historical evolution, their present implications, and the imperative need for refinement.

As societal dynamics and patterns of alcohol consumption evolve, so too must the legislative mechanisms designed to …

Financial Hardship And Neighborhood Socioeconomic Disadvantage In Long-Term Childhood Cancer Survivors, Alex J Fauer, Weiyu Qiu, I-Chan Huang, Patricia A Ganz, Jacqueline N Casillas, Gregory T Armstrong, Rebecca Howell, Carrie R Howell, Anne C Kirchhoff, Yutaka Yasui, Paul C Nathan

Faculty, Staff and Student Publications

Background: Long-term survivors of childhood cancer face elevated risk for financial hardship. We evaluate whether childhood cancer survivors live in areas of greater deprivation and the association with self-reported financial hardships.

Methods: We performed a cross-sectional analysis of data from the Childhood Cancer Survivor Study between 1970 and 1999 and self-reported financial information from 2017 to 2019. We measured neighborhood deprivation with the Area Deprivation Index (ADI) based on current zip code. Financial hardship was measured with validated surveys that captured behavioral, material and financial sacrifice, and psychological hardship. Bivariate analyses described neighborhood differences between survivors and siblings. Generalized linear …