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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
131

Evaluating drainage water recycling in tile-drained systems

Benjamin D Reinhart (8071469) 03 December 2019 (has links)
<p>Drainage water recycling (DWR) is the practice of capturing, storing, and reusing subsurface drained agricultural water to support supplemental irrigation and has recently been proposed as a practice for improving the crop production and water quality performance in the tile-drained landscape of the U.S. Midwest. This study describes the development of a modeling framework to quantify the potential irrigation and water quality benefits of DWR systems in tile-drained landscapes and the application of the model using ten years of measured weather, tile drain flow and nutrient concentrations, water table, and soil data from two sites in the U.S. Midwest. From this modeling framework, the development and testing of an open-source online tool is also presented.</p><p></p><p>A spreadsheet model was developed to track water flows between a reservoir and drained and irrigated field area at each site. The amount of tile drain flow and associated nutrient loads that could be captured from the field and stored in the reservoir was estimated to calculate the potential water quality benefits of the system. Irrigation benefits were quantified based on the amount of applied irrigation annually. A reservoir size representing 6% to 8% of the field area with an average depth of 3.05 m was sufficient in meeting the annual irrigation requirements during the 10-year period at each site. At this reservoir size, average annual nitrate-N loads were reduced by 20% to 40% and soluble reactive phosphorus loads by 17% to 41%. Variability in precipitation within and across years, and differences in soil water characteristics, resulted in a wide range of potential benefits at the two sites.</p><p>An online tool was developed from the model, and a variance-based global sensitivity analysis was conducted to determine influential and low-sensitivity input parameters. The input parameter, depth of root zone, was the most influential input parameter suggesting that the estimation of total available water for the field water balance is a critical component of the model. Input settings describing the irrigation management and crop coefficients for the initial establishment and mid-season crop growth periods were also influential in impacting the field water balance. Reservoir seepage rate was influential in regard to the reservoir water balance, particularly at larger reservoir sizes. Sensitivity analysis results were used to develop a user-interface for the tool, Evaluating Drainage Water Recycling Decisions (EDWRD).</p><p>This study shows that DWR is capable of providing both irrigation and water quality benefits in the tile-drained landscape of the U.S. Midwest. The developed modeling framework supports future research on the development of strategies to implement and manage DWR systems, and the online tool serves as a resource for users to increase their awareness and understanding of the potential benefits of this novel practice.</p><p></p>
132

EXPERIMENTAL INVESTIGATION OF REPAIR TECHNIQUES FOR DETERIORATED END REGIONS OF PRESTRESSED CONCRETE BRIDGE GIRDERS

William Rich (10713612) 06 May 2021 (has links)
<div> <p>Due to harsh environmental conditions, the deterioration of prestressed concrete bridge girders is a commonly observed phenomenon in Indiana and much of the Midwest. Concordantly, one widely observed damage scenario is deteriorated end regions of prestressed concrete girders. Damaged or failed expansion joints expose prestressed concrete girder end regions to chloride-laden water, resulting in a corrosive environment in which reinforcement section loss and concrete spalling can occur. For bridges experiencing this type of deterioration, action is needed to ensure the structure remains safe and serviceable. As such, an experimental program was developed to investigate the effectiveness of three repair techniques in restoring the structural behavior of prestressed concrete bridge girders with end region deterioration. The three examined repair techniques are (i) an externally bonded fiber reinforced polymer (FRP) system, (ii) a near-surface-mounted (NSM) FRP system, and (iii) a concrete supplemental diaphragm. Additionally, installation procedures for the three end region repair techniques were developed. Results, conclusions, and recommendations from the experimental program are presented to help advise best practices for implementing end region repair techniques in the field. </p> </div> <br>
133

Electronic Benefit Transfer: Food Choices, Food Insecurity, and Type 2 Diabetes

Malkin-Washeim, Diana Louise 01 January 2015 (has links)
The purpose of this research was to examine food security for people with prediabetes participating in the Supplemental Nutrition Assistance Program (SNAP), focusing on their food choice decisions and coping strategies over a 30-day benefit cycle that potentially increases the risk of Type 2 diabetes. A cross-sectional, quantitative design based on food choice process model constructs was used. SNAP participants (n = 36) with prediabetes, aged 21-70 years, were recruited as outpatients from Bronx Lebanon Hospital and completed self-reported questionnaires on demographics and health, food security, and food frequency. Descriptive statistics, Pearson chi square tests, and regression analysis were performed using SPSS. Also, independent t test, and Levene's test were used for ad hoc analysis to assess variation of food choice decisions over 30 days. Of the sample, 5% had low and 95% very low food secure status. Food security status did not predict coping strategies (p = .724); however, food security status and type of coping strategy had a moderate relationship (p < 0.01; r =.60). Food choices of 11 food categories changed over a 30-day cycle with greatest variation for Week 1, compared to Weeks 2-4 (p < .005). Use of coping strategies to minimize hunger was limited. Very low food security associated with certain coping strategies disrupted eating patterns. Disrupted eating patterns affect food variation over time, increasing the intake of non-nutrient-dense foods and the risk of obesity and Type 2 diabetes. The implications for positive social change include the potential to change SNAP's benefit allotments, make nutrition education mandatory, and create a nutrition package, thereby lowering food insecurity and the risk of Type 2 diabetes.
134

Nurse Educators' Perspectives of Supplemental Computer-Assisted Formative Assessment in an Associate Degree Nursing Program

Sugg, Jennifer Buehler 01 January 2015 (has links)
Despite the implementation of various strategies to improve outcomes, the pass rates for the National Council Licensure Exam for Registered Nurses (NCLEX-RN) for an associate degree nursing (ADN) program continue to decrease. This study examined the use of a supplemental computer-assisted formative assessment (SCAFA) as a strategy for NCLEX-RN success. A qualitative case study with a theoretical framework based on constructivism was designed to investigate nurse educators' perspectives of this particular strategy for successful outcomes. To explore these perspectives, data were collected from face-to-face interviews with nurse educators and from program documents from 1 ADN program in the southeastern United States. Guiding research questions explored nurse educators' perceptions of SCAFA and determined if and how data from these assessments were utilized. The data were analyzed using lean coding to determine emerging themes. The findings showed that a lack of consistency in the use of this tool diminishes the effectiveness of this supplemental strategy. Additional themes that emerged: educator and student attitudes, orientation and SCAFA process, resource allocation, training and preparation, and data-driven decision making. These findings were used to design a professional development project focused on the effective use of SCAFA throughout the nursing program. The study and project are expected to promote positive social change by contributing to the body of evidence on computer-assisted formative assessment, bolstering student and nurse educator learning, increasing the number of nursing students who are prepared to successfully pass the NCLEX-RN, improving program outcomes, and contributing to the professional nursing workforce.
135

Academic Motivation and Student Use of Academic Support Interventions

Fallon, Elizabeth B. 04 September 2019 (has links)
No description available.
136

An Analysis of Financial Planning for Employees of East Tennessee State University.

Campbell, Steven Roy 06 May 2006 (has links) (PDF)
The purpose of this study was to determine if East Tennessee State University provides its employees appropriate financial planning services. In particular, it is unknown to what degree employees of East Tennessee State University have actively engaged in financial planning. The research was conducted during June and July, 2005. Data were gathered by surveying faculty, staff, and retirees of the university. Ten percent of the population responded to the study. The survey instrument covered the areas of retirement, other financial planning services, and attitudes toward financial planning. The results of the data analysis gave insight into what degree employees of East Tennessee State University have actively engaged in financial planning. For example, over 20% of the respondents encouraged employees to start early in order to achieve the benefit of time value of money. Fifteen percent of the respondents suggested financial planning workshops be offered on a more frequent basis. Approximately 10% of the respondents preferred an instructor to be independent, instead of a financial salesperson. The study provided an increase in the body of knowledge on financial planning for the ETSU employee and established a historical database for the various programs offered within the ETSU system.
137

ENABLING STUDENTS TO LEARN: DESIGN, IMPLEMENTATION AND ASSESSMENT OF A SUPPLEMENTAL STUDY STRATEGIES COURSE FOR AN INTRODUCTORY UNDERGRADUATE BIOLOGY COURSE

Sriram, Jayanthi Sanjeevi 04 August 2014 (has links)
No description available.
138

The Effects of Access and Education on Preschool Children’s Fruit and Vegetable Intake

Smith, Elizabeth Ann 23 June 2017 (has links)
No description available.
139

Determinants of Shadow Education: A Cross-National Analysis

Southgate, Darby E. January 2009 (has links)
No description available.
140

PROMOTING HEALTHY HOME-COOKED FAMILY MEALS: EVALUATION OF A SOCIAL MARKETING PROGRAM TARGETING LOW-INCOME MOTHERS

Dawahare, Mollie Y. 01 January 2016 (has links)
Objective: Evaluate how a social marketing approach compares to traditional nutrition education curriculum for promoting behavioral changes related to eating and food. Design: Nonequivalent comparison group, entry-exit design. Participants from 12 Kentucky counties assigned either comparison or pilot group. Comparison group received traditional nutrition education curriculum and pilot group received the social marketing program, Cook Together, Eat Together (CTET) curriculum. EFNEP’s Behavior Checklist and 24-Hour Dietary Recall were administered at entry and exit of the 8-week programs. Participants: Females (18-72 years of age) from families eligible to receive SNAP benefits (n=64 comparison group participants, n=60 pilot group participants). Intervention: Comparison group completed an 8-week standard lesson and pilot group completed CTET program in varying time frames (1-8 weeks). Main Outcome Measures: Eating behavior changes between entry and exit for comparison versus pilot. Analysis: Quantitative data were analyzed using independent and paired t-tests with significance of P≤ 0.05 and 0.10. Results: Groups were demographically similar. Both had significant differences in entry and exit scores for Behavior Checklist and 24-Hour Recall (P≤ 0.05). Conclusion and Implications: Positive behavior change was observed in both comparison and pilot groups. A social marketing program proves to be a promising approach to nutrition education.

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