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Toward Sustainable Green Asphalt Pavement Mixture Using Rap And Waste Engine Oil, Aya Refaat, Amina M. Saleh, Reem K. Farag, Abdelzaher E. A. Mostafa

Trends in advanced sciences and technology

Aim/Objectives/Background

Recently, reclaimed paving material (RAP) has gained priority in road paving due to concerns about the depletion of natural resources and its environmental impact. Restoring RAP properties, including solid material gradation and aged asphalt characteristics, is essential. This research aims to prepare an economical asphalt paving mix using 100% RAP and waste engine oil (WEO) as a rejuvenator for aged asphalt, facilitating its reuse in road paving.

Methods

To achieve the aim, aged asphalt was extracted from RAP and characterized for physical, chemical, and molecular structure. RAP was characterized through sieve analysis. The maximum proper content of WEO required …

Dynamic Analysis And Experimental Verification Of Flexible Unbalance Rotor Supported By Two Identical Journal Bearings, Omar Ahmed, Hussein Sayed, T.A. El-Sayed

Trends in advanced sciences and technology

Abstract BACKGROUND: Analyzing the vibrations for rotor-bearing systems is a critical issue in the field of rotor dynamics. It is crucial to identify rotary machine vibrations, behaviors, and stability conditions. The main causes of vibration in rotating machinery are unbalanced masses, misalignment, mechanical looseness, shaft cracks, and other defects. METHODS: This paper investigates the experimental verification of a theoretical model, using a steel shaft with a disc set at the midpoint, supported by two symmetric fluid film bearings. The study examines the effect of unbalance on the dynamic behavior of the rotor and its vibration characteristics. The experimental investigation involved …

Synthesis, Anticancer Activity And Docking Study Of Novel Benzo[H]Quinoline Derivatives, Marwa A. Khodair, Mosaad S. Mohamed, Samir M. Awad, Rania H. Abd El-Hameed

Trends in advanced sciences and technology

Background: Benzo[h]quinolines have attracted a lot of interest because of their biological characteristics, especially their capacity to impede cell proliferation, for this reason it is essential to utilize their high activity for new, powerful anti-cancer agents’ discovery. Objective: The main objectives are to synthesize de-novo benzo[h]quinolines and fused analogues then evaluate their anti-cancer activities. Methods: Our target compounds 1a-d were prepared through Knoevenagel condensation followed by Michael addition. Compounds 1a-d were further cyclized via reactions with different reagents particularly, formic acid, formamide, acetic anhydride and carbon disulfide to obtain fused derivatives 2-5 (a-d) respectively. Structures …

Green Flow-Gradient Micellar High Performance Liquid Chromatograpic Method For Determination Of A Hypertensive Combination ; Azilsartan Medoxomil And Chlorthalidone :Application To Spiked Human Plasma And Urine, Maha M. Abou El-Alamin, Maha A. Sultan, Dina A Mohamed, Marwa M. Azab

Trends in advanced sciences and technology

A green novel cost effective flow-gradient micellar high performance liquid chromatographic method was developed and validated for the simultaneous determination of two antihypertensive drugs,Azilsartan Medoxomil (AZL) and chlorthalidone (CLT) in plasma and urine. The eco-friendly method showed good linearity over the ranges of 15.00-80.00 µg/mL and 12.50-62.50 µg/mL with limits of detection (LOD) of 0.19, 0.12 µg/mL and limits of quantification (LOQ) of 0.59, 0.36 µg/mL for AZL and CLT, respectively. The proposed method was successfully applied for the simultaneous analysis of the studied drugs in their single tablets, laboratory mixed tablets in human plasma and urine without prior extraction …

Effect Of New Combined Infill Patterns And Building Strategy On The Properties Of Fdm Printed Pla Parts, M. Hamoud, Omnia M. Momamed, Azza F. Barakat, Ahmed Sobhi

Trends in advanced sciences and technology

Fused Deposition Modelling (FDM) is a popular 3D printing technique that is growing rapidly because it can produce complex shapes directly from CAD models. Its mechanical behavior needs to be thoroughly investigated with consideration of its growing applications in order to be used as an end-use functional part in various industries.This functional parts are affected due to their lower mechanical properties so the wide variety of FDM process parameters made it challenging to assess the mechanical behavior of the it’s part. This paper aims to investe layer arrangements of different building strategies on tensile behavior of combining infill pattern samples …

Analysis Of Second-Order Dynamic Coefficients For Herringbone Grooved Hydrodynamic Thrust Bearings Considering Misalignment, Elsayed K. Elsayed, Tamer.A. El-Sayed, Hussein Sayed

Trends in advanced sciences and technology

A herringbone grooved hydrodynamic thrust bearing is a specialized type of bearing designed to support axial loads in rotating machinery. It is commonly used in turbines, compressors, and pumps. It utilizes a hydrodynamic lubrication mechanism to reduce friction and wear between the rotating and stationary parts. In this paper, a second order dynamic analysis for the herringbone grooved thrust bearing based on the finite perturbation abroach is performed. The Reynolds equation, expressed in polar coordinates, was differentiated to analyze small perturbations from the equilibrium state. This process yielded the first order and then the second-order equations describing these perturbations. Reynold's …

Modeling Earthquake Catalog (1985-2022) In Northern Egypt Using Space-Time Epidemic-Type Aftershock Sequences (Etas), Mariam Ramadan, Amir Ismail, Amin E. Khalil, Hesham Abdelhafiez, Nouran S. Salama

Trends in advanced sciences and technology

Earthquakes have the largest damaging effects among natural disasters on a global scale. Efforts for reducing their effects have taken place for a long time. The prediction of earthquakes was the main target, however the studies conducted were not successful. As a replacement, seismic hazard assessments were adopted to predict the levels of ground motion for the possible future large earthquakes. This approach is probabilistic in nature that rely on the quality of earthquake catalog. The probabilistic model adopted is built on the assumption that the events in the earthquake catalog are random Poisson distribution, assuming that events are independent …

Dual Activity Of Aromatic And Heterocyclic Compounds As Anti-Inflammatory And Anticancer Promising Agents, Samar Said Fatahala, Rania Helmy Abd El-Hameed, Mosaad Sayed Mohamed, Neama Abdallah Abd El-Tawab

Trends in advanced sciences and technology

As the second leading cause of mortality worldwide, cancer poses a severe threat to human health. Chronic inflammation has recently been linked to an increased risk for a number of malignancies, suggesting that reducing inflammation could be a useful approach to both cancer prevention and treatment. This review delves into the connection between inflammation and cancer and outlines the current use of anti-inflammatory drugs as potentially effective cancer prevention and therapy strategies. we herein describe the main relation and the mechanisms underlying the anti-cancer outcomes of anti-inflammatory agents; namely Non-Steroidal Anti-inflammatory Drugs (NSAIDs), COX-2 inhibitors, LOX-inhibitors, Toll- inhibitors, and antioxidant …

Experimental Process Analysis For Improved Micro-Drilling Quality Of Austenitic Stainless Steel Aisi304, Osama Ali, Ahmed Elkaseer, Azza Barakat, Ahmed Sobhi

Trends in advanced sciences and technology

Austenitic stainless steel AISI304, known for its outstanding mechanical, physical properties, and biocompatibility, is a preferred material for diverse applications. Its hard-to-machine nature presents challenges such as rapid tool wear and poor thermal conductivity, affecting machining quality. This study takes a deep look at the micro drilling of such challenging gap of AISI 304 with 0.8 mm tungsten carbide micro drills, focusing on how key process parameters; linear cutting speed, feed per tooth, and cutting length affect maximum exit burr height and roundness through interaction effects among these factors to identify better drilling conditions with better responses. Utilizing a factorial …

Emotional Eating, Nutritional Knowledge, And Socioeconomic Status As Predictors Of Body Mass Index, Tifani Buss

Walden Dissertations and Doctoral Studies

Obesity is an ill-health condition that can lead to other ill-health conditions such as cardiovascular disease, high blood pressure, asthma, type 2 diabetes, and some types of cancer. Obesity is also a condition that does not discriminate regarding age, gender, or race/ethnicity. In light of obesity’s status as a global epidemic, efforts for prevention and intervention treatments are needed to improve individuals’ health and quality of life. The purpose of this quantitative study was to examine emotional eating, nutritional knowledge, and socioeconomic status, as predictors of body mass index (BMI). These factors were examined through the lens of general strain …

Missed Medical Appointments And The Effect On Patient Care For African Americans Living With Hiv In Alabama, Perpetua Nazon

Walden Dissertations and Doctoral Studies

This quantitative correlational study examined the relationship between the independent variable of missed medical appointments and the dependent variables of race and gender for African American patients living with HIV/AIDS. Previous studies described the major issue that occurs with HIV patients is an increase of missed medical appointments, causing a panic for hospital administrators, who try to implement methods to reduce the rates of missed appointments. The study sample from the Center for AIDS Research (CFAR) Network of Integrated Clinical Systems (CNICS) database covered a total population of 14,521 African American males and females living with HIV in Alabama. Pearson’s …

Strategies For Mitigating The Costs Of Evolving U.S. Governmental Regulations In The Financial Investment Industry, Walter Steven Miller

Walden Dissertations and Doctoral Studies

Financial investment leaders who lack strategies to respond to U.S. government financial policy changes’ risk decreasing organizational profitability resulting in customer and employee attrition. Grounded in Porter’s theory of competitive advantage, Barney’s resource-based view (RBV) theory and Pigou’s public interest theory, the purpose of this qualitative multicase study was to explore strategies financial investment leaders use to respond to U.S. governmental policy changes. The participants comprised three financial investment leaders at three Jacksonville, Florida organizations. Data were collected using semistructured interviews conducted face to face and by telephone along with documents obtained from the company websites. Through thematic analysis four …

A Multidisciplinary Approach To Managing Financial Toxicity In Oncology Patients, Katelin Muse

Walden Dissertations and Doctoral Studies

Patients with a cancer diagnosis are counseled at length about the standard of care treatment options, which may include surgery, radiation, anticancer medications, and chemo/immunotherapy through an informed consent process. Unfortunately, the potential economic burden and the accompanying psychological burden is seldom discussed up front. There is a significant need for routine screening and a multidisciplinary approach to the prevention of financial toxicity for the oncology patient. The purpose of this doctoral project was to lead an interprofessional team in the development of a clinical practice guideline for routine financial screening using the Comprehensive Score for Financial Toxicity (COST) tool …

Impact Of Traditional Education And Learner-Centered Education On Standardized Tests, Courtney Marie Winslow

Walden Dissertations and Doctoral Studies

There is a current shortage of approximately 45,000 nurses and nursing faculty to train student nurses, a number that is projected to grow. One proposed method to combat the shortage is to transition from traditional lecture-based classrooms to a learner-centered approach. Asking or requiring faculty to transition an entire nursing program from one teaching method to another without supporting data could be a waste of valuable time and resources. It could also prove detrimental to a program if students were unable to pass the NCLEX-RN exam, and a program was forced to close. The current study examined whether there was …

Explaining Variation In Adoption Of Organizational Innovation: A Social Network Approach, Pooria Assadi

Journal of International Technology and Information Management

This article draws from the social network theory and examines how a social network approach can contribute to our understanding of the variation in the adoption of innovative, organization-wide information systems that can help businesses achieve sustainable competitive advantage. It highlights how the extant explanations for the adoption of information systems are limited in the way that they primarily assume organizations make innovation adoption decisions in isolation. It does so by building on growing research which recognizes that organizations are not isolated from one another; rather, they are interrelated through their inter-organizational networks which provide unique learning opportunities that are …

Competencies And Capabilities As Determinants Of Digital Entrepreneurship: An Empirical Validation, Arvind Gudi, Ravi Chinta, Alan Jin

Journal of International Technology and Information Management

This study aims to examine the influence of digital competencies and awareness of digital capabilities on digital entrepreneurial drive in the pre-startup stages of hi-tech businesses. Based on primary data from a sample of 357 respondents, we tested the hypothesized relationships for direct and interactive effects on digital entrepreneurial drive. Our results show that digital competencies and awareness of digital capabilities influence entrepreneurial aspiration and commitment in the pre-startup phase. We use the digital entrepreneurship framework by Recker and von Briel (2019) as the theoretical foundation and demonstrate a novel approach to expand the dimensions of digital enabler, digital outcome, …

What Can We Learn From A Co-Creation Journey For A Quick Scan Digital Transformation Maturity Assessment Tool For Development Ngos?, Anand Sheombar

Journal of International Technology and Information Management

This paper describes the approach and lessons learned from a co-creation process with Dutch development NGOs to create a practical and easy-to-use assessment tool for practitioners to assess the organisation's maturity level of digital transformation. For this study, we applied a design science research methodology, specifically a six-step co-creation approach suitable for developing maturity models. The digital maturity assessment tool (quick scan) created is a domain- specific digital transformation maturity tool for development NGOs rather than a generally applicable tool. This artefact was evaluated using an eight-point Requirements framework for the development of digital maturity assessment tools. By developing a …

Exploring The Pre- And Post-Pandemic Connection Between The Plus School Climate Survey And Student Outcomes: A Comparative Analysis And Predictive Study, Sarah V. Neely

University of the Pacific Theses and Dissertations

The return to in-person schooling post-COVID-19 pandemic has brought increased pressure on educators to ensure academic success for students. This study examines the school climate of 40 elementary and middle schools in California's Central Valley and its impact on academic performance and attendance, comparing pre-pandemic (2018-2019) with post-pandemic (2021-2022 and 2022-2023) data. Additionally, the study explores the influence of positive student-teacher relationships on academic outcomes and chronic absenteeism. Utilizing the PLUS School Climate Survey, this research sought to identify significant differences in survey scores pre- and post-pandemic, as well as examining the predictive power of student-teacher connectedness on academic performance …

Examining Differences In Self-Concept And Language Between Monolingual And Bilingual Undergraduate Students, Marilyn Vega-Wagner

University of the Pacific Theses and Dissertations

The literature is lacking in studies that examine self-concept and language status among individuals older than adolescence. The purpose of this study is to conduct a quantitative nonexperimental comparative design to examine differences in self-concept and language status (monolingual or bilingual) between male and female undergraduate students in California. A total of 97 participants were examined in the study. The researcher conducted descriptive statistics on the demographics as well as a MANOVA and an ANOVA to answer the proposed research question. Based on the findings presented, the researcher failed to reject the null hypothesis of research question 1: There is …

Transforming Land And Home Ownership: Emergent Strategy And Community Cultural Wealth In Developing Community Land Trusts, Ahmed Naguib

University of the Pacific Theses and Dissertations

This dissertation investigates the transformative potential of Community Land Trusts (CLTs) in reimagining land and homeownership within the context of capitalist real estate markets. Utilizing a qualitative research framework that combines narrative inquiry with Emergent Strategy and Community Cultural Wealth theories, this study explores the intricacies of developing CLTs as a counter-narrative to traditional models of property ownership. Through extensive narrative analysis of four distinct CLTs in California, this research highlights the complex challenges and innovative strategies employed to scale CLTs in competitive urban markets. The findings reveal how CLTs leverage emergent strategy and community cultural wealth to navigate and …

Engagement Between African American Male Students And The Community College, Parrish Geary

University of the Pacific Theses and Dissertations

Using data from the Community College Survey of Men designed by the Community College Equity Assessment Lab—Minority Male Community College Collaborative at San Diego State University, this study examined factors influencing in- and out-of-classroom engagement of African American male students at community colleges in California. The results suggested positive relationships between multiple predictors and independent variables on ethos factors for African American men. Additionally, the outcomes showed that 4 of the 5 independent variables were significant for African American men (i.e., personal relationships, faculty acknowledgment, belonging, and feeling welcomed). A review of the standardized beta coefficients revealed that the strongest …

The Decline Of Science In The Early Years: A Diagnosis And A Plan Of Action, Jennifer Bentley

University of the Pacific Theses and Dissertations

Science instruction in the early years of a student’s education career is essential to a student successfully continuing science in their secondary and postsecondary careers. However, the amount of high-quality science instruction students receive at the elementary level has been steadily declining for two decades, resulting in an inequitable imbalance in those who pursue STEM careers, a lack of critical science literacy in the U.S. populace, and a shortage of qualified employees entering the U.S. economy. Much of the lack of science instruction can be traced to decreased training of teachers to teach science during elementary credentialing programs or the …

Role Play Or Real Play: A Quasi-Experiment In The Counseling Classroom, Elke Schmeling

University of the Pacific Theses and Dissertations

The relationship between pedagogy and self-efficacy beliefs is at the core of this dissertation. A continued demand for mental health service providers who can handle challenging caseloads requires novice professionals who are both well prepared and confident in their own skills and abilities, as self-efficacy is a positive predictor of performance. Since experiential learning opportunities are considered particularly beneficial to fostering self-efficacy beliefs, two cohorts of graduate students in a beginning psychotherapy course who engaged in different experiential learning activities were compared in terms of their counseling self-efficacy growth over the course of one semester. One cohort of students engaged …

Choral Students’ Perception Of Kinesthetic Pedagogy In The High School Choral Classroom, Molly Bolewski

University of the Pacific Theses and Dissertations

This study examines the incorporation of kinesthetic pedagogy in secondary choral rehearsals and its impact on student engagement and learning. Three experienced high school choral teachers and their students from Northern California participated in the study. Each teacher conducted four consecutive rehearsal sessions, recording themselves instructing on two pieces of music using teacher-modeled and student-imitated kinesthetic gestures. Students completed daily surveys assessing their enjoyment and engagement levels, and teachers provided a final reflection on their usual kinesthetic practices. Video footage of twelve rehearsals and teachers’ final reflections were analyzed to identify patterns in kinesthetic usage, revealing that these teachers’ kinesthetic …

Exploring The Relative Contribution Of Humans On Genetic Differentiation Among Speyeria Callippe Populations In The California Coast Ranges, Laura K. Heller

University of the Pacific Theses and Dissertations

The distinction between populations due to environmental factors like climate and geography are well-known and expected, therefore it is not illogical to believe more disjunct habitats would also impact genetic structure. Through Restriction Site Associated DNA Sequencing (RADseq) and Mitochondrial DNA (mtDNA) analysis the genetic structure and differentiation (fixation index, Fst) of Speyeria callippe across four regions in California: the North Coast Ranges, Bay Area, Diablo Range, and South Coast Ranges were analyzed. The influence of geographic distance, human population density, and forest cover were explored as factors influencing the genetics of these populations. The combination of mtDNA and RADseq …

Quantitative Shotgun Proteomic Analysis Of Bacteria After Overexpression Of Recombinant Spider Miniature Spidrion, Masp1, Kathryn P. Randene

University of the Pacific Theses and Dissertations

Spider silk has extraordinary mechanical properties, displaying high tensile strength, elasticity, and toughness. Given the high performance of natural fibers, one of the long-term goals of the silk community is to manufacture large-scale synthetic spider silk. This process requires vast quantities of recombinant proteins for wet-spinning applications. Attempts to synthesize large amounts of native size recombinant spidroins in diverse cell types have been unsuccessful. In these studies, we design and express recombinant miniature black widow (Latrodectus hesperus) MaSp1 spidroins in bacteria that incorporate the NTD and CTD, along with varying numbers of codon-optimized internal block repeats. Following spidroin overexpression, we …

Evaluating The Effects Of Self-Monitoring On Physical Activity Within A Health Coaching Package, Morgan E. Valois

University of the Pacific Theses and Dissertations

The World Health Organization recommends that adults engage in at least 150 minutes of moderate to vigorous physical activity every week. Engaging in physical activity improves long-term health, unfortunately, half of the adults in the United States do not meet the recommended levels. Health coaching is a patient-oriented approach to deliver behavior change interventions that has been shown to increase physical activity and improve health outcomes. Self-monitoring is a component of health coaching, and is a behavior change technique that has been identified as an integral component of health interventions that resulted in improved health outcomes. However, the specific effects …

Structural And Functional Studies Of The Human Members Of The Macrophage Migration Inhibitory Factor Family, Andrew Parkins

University of the Pacific Theses and Dissertations

Macrophage migration inhibitory factor (MIF) and D-dopachrome tautomerase (D-DT) are the two human members of the MIF superfamily, which are implicated in an array of autoimmune disorders, inflammatory diseases, and cancer via their pleiotropic functionality. Despite only sharing 34% sequence identity, MIF and D-DT have high structural homology and overlapping functional traits, including activation of the type II cell surface receptor CD74 and keto-enol tautomerase activity. The MIF and/or D-DT-induced activation of CD74 leads to signaling cascades pivotal for cell growth, proliferation, and inhibition of apoptosis. Such characteristics make MIF and D-DT attractive molecular targets for drug discovery.

Currently, all …

Elaboration Of Diquinanes To Access Trifunctional Angular Triquinanes And Designed Dna Polymerase Α Inhibitors, Spencer M. Webber

University of the Pacific Theses and Dissertations

Natural products are of great significance to the pharmaceutical industry in the development of new drugs. Diquinane or bicyclo[3.3.0]octane is a conspicuous structural unit existing in the carbo-frameworks of a wide range of natural products such as alkaloids and terpenoids. These diquinane-containing molecules not only exhibit intriguing architectures, but also showcase a broad spectrum of significant bioactivities, which draw widespread attention from the global synthetic community. A more specific group of compounds containing a diquinane moiety with one extra 5-membered ring are called the angular triquinanes.In this work, we have developed a general synthetic scheme to the angular triquinanes. We …

From Elementary School To Doctoral Education: An Autoethnographic Journey, Gwendolyn D. Dailey

University of the Pacific Theses and Dissertations

Every child has a right to education, and their skin color should not determine their education quality. However, since the landmark case of Brown v. Board of Education (1954), it has been proven that race continues to matter in the success and failure of education (Delgado & Stefancic, 2001). The persistent achievement gaps between students of different racial and ethnic backgrounds, as well as the disparities in access to high-quality educational opportunities, demonstrate how race and ethnicity shape the educational experiences of students of color (Stanford Center for Education Policy Analysis, 2012). Unfortunately, stories such as Ruby Bridges of New …