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Articles 10021 - 10050 of 197972

Full-Text Articles in Engineering

Design And Development Of Hip Implants For Longevity Through Integrating Advanced Groove Structures And Additive Manufacturing, Asarudheen Abdudeen Jun 2025

Design And Development Of Hip Implants For Longevity Through Integrating Advanced Groove Structures And Additive Manufacturing, Asarudheen Abdudeen

Dissertations

This doctoral research concerns the design and optimization of hip implants (HIs) to enhance performance, durability, and improve patient outcomes by addressing the key issues of wear, deformation, and stress distribution. Innovative surface groove designs have been introduced to both a solid and a hollow femoral head with the aim of reducing friction and wear. The addition of grooves, with both a hemispherical and rectangular cross-section, onto the femoral head reduced friction, as debris produced by the inner liner was trapped within the grooves, significantly reducing adhesive wear. A numerical simulation study compared the effects of surface modifications both grooves …

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Investigation And Prediction Of Excessive Water Production In Bottom Water-Drive Naturally Fractured Reservoirs Using Machine And Deep Learning, Sami Abderraouf Belkhir Jun 2025

Investigation And Prediction Of Excessive Water Production In Bottom Water-Drive Naturally Fractured Reservoirs Using Machine And Deep Learning, Sami Abderraouf Belkhir

Theses

Naturally Fractured Reservoirs (NFRs) are characterized by dual-porosity and dual-permeability systems, posing significant challenges in managing water production due to highly conductive fracture networks that facilitate rapid water migration from bottom aquifers, often bypassing oil stored in the matrix, thus resulting in early water breakthrough and water channeling phenomena. The main objective of this thesis is to develop and validate deep learning and machine learning models to predict water production, water breakthrough time (tbt), and ultimate water cut (WCult) in NFRs, thereby enabling more effective reservoir management strategies. This work also aims to evaluate the sensitivity of water behavior to …

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Data-Driven Machine Learning Applications For Predictive Modeling Of Petrochemical And Ecofriendly Systems, Noora Saleh Al Mansoori Jun 2025

Data-Driven Machine Learning Applications For Predictive Modeling Of Petrochemical And Ecofriendly Systems, Noora Saleh Al Mansoori

Theses

Traditional experimental approaches in industrial processes, such as Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy, thermogravimetric analysis (TGA), and well-drilling operations, are often constrained by time, cost, and operational limitations. This research explores the application of data-driven Machine Learning (ML)-based predictive modeling to improve efficiency and reduce dependency on resource-intensive experimentation. The study develops ML models for three distinct processes: FTIR intensity prediction of bitumen thermal cracking products, thermal degradation of Medium-Density Fibreboard (MDF) using TGA data, and Rate of Penetration (ROP) prediction in petrochemical industry. Six algorithms: Linear Regression (LinReg), Partial Least Squares Regression (PLSR), Support Vector Regression (SVR), Gradient …

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Supporting Student Success In Engineering By Promoting The Participation Of Underrepresented Minorities In Research Venues, Eleazar Marquez, Hiram Moya, Anil K. Srivastava Jun 2025

Supporting Student Success In Engineering By Promoting The Participation Of Underrepresented Minorities In Research Venues, Eleazar Marquez, Hiram Moya, Anil K. Srivastava

Mechanical Engineering Faculty Publications

In this study, the recruitment model termed IBIEE (Identify, Build, Integrate, Evaluate, Extend) was implemented to attract, advance, and advocate the participation of underrepresented engineering students to a research collaboration effort between The University of Texas Rio Grande Valley (UTRGV) and a National Laboratory. The purpose of the partnership between these two entities is meet the following goals: a) find innovative manufacturing techniques for weapons development, and b) prepare UTRGV students to conduct internships and be employed with the National Laboratory. Similarly, the internal aim of UTRGV is to 1) support student success in engineering by promoting the participation of …

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Skip The Grid: Bringing Solar To The Navajo Nation, Samuel B. Mcclintock Ii Jun 2025

Skip The Grid: Bringing Solar To The Navajo Nation, Samuel B. Mcclintock Ii

Construction Management

Skip the Grid is a student-driven, interdisciplinary initiative dedicated to improving access to electricity for families of the Navajo Nation. The project focuses on educational equity by addressing barriers to home study, such as insufficient lighting and energy. These issues stem from the Navajo Nation's remote nature and the families' access to resources. In March of 2025, a group of 24 students and faculty from California Polytechnic State University (Cal Poly), representing six different educational departments, traveled to Arizona to partner with the Chinle Unified School District in addressing educational equity in the Navajo Nation. The effort allowed students to …

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Thermomechanical And Thermal Characterization Of Pressureless Sintered Tib2, Simone Taraborelli, Simone Failla, Diletta Sciti, Steven M. Smith, Jeremy Watts, William G. Fahrenholtz, Greg E. Hilmas Jun 2025

Thermomechanical And Thermal Characterization Of Pressureless Sintered Tib2, Simone Taraborelli, Simone Failla, Diletta Sciti, Steven M. Smith, Jeremy Watts, William G. Fahrenholtz, Greg E. Hilmas

Materials Science and Engineering Faculty Research & Creative Works

The impact of high-energy milling using WC[sbnd]Co media on the pressureless sintering and properties of TiB2 was studied. After 30 mins of milling, samples sintered at 2200 °C achieved a high relative density (>98 %) and a fine mean grain size (<2 >µm). In the microstructure WxBy phases, often containing Co, were observed at triple points, due to contamination from the milling media. Moreover, core-rim structures with multiple rims were detected: the cores consisted of pure TiB2 grains, the rims were (TixWy)B2 solid solutions. The core-rim formation was significantly more pronounced compared to a reference sample of …

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A Survey Of Industry Professionals On The Role Of Ff&E In Sustainability, Caius T. Toy-Grace Jun 2025

A Survey Of Industry Professionals On The Role Of Ff&E In Sustainability, Caius T. Toy-Grace

Construction Management

This study is designed to explore how professionals in the construction and design industries perceive the role of furniture, fixtures, and equipment (FF&E) in building sustainability. Although FF&E is often viewed as a minor component of the overall construction process, it has the potential to significantly impact environmental outcomes through material sourcing, durability, and end-of-life recyclability. A survey was distributed to eight professionals in FF&E, construction, and sustainability-related fields. The survey included eight questions, with four multiple choice and four open-ended, designed to gather both quantitative and qualitative insights. Responses were analyzed to determine how often sustainability is considered in …

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Upstander Behaviors To Combat Implicit Bias, Jakob J. Wilkins Jun 2025

Upstander Behaviors To Combat Implicit Bias, Jakob J. Wilkins

Construction Management

This project investigates how individuals across different experience levels in the construction industry respond to workplace bias, exclusion, and unfair treatment. Rather than focusing on the often-ambiguous term “ally,” this study explores the role of an “upstander,” someone who takes thoughtful, proactive action to support fairness and inclusion. Using a combination of survey data, industry interviews, academic literature, and a participatory workshop at the 2025 Women in Construction Symposium, the study identifies effective upstander behaviors and evaluates their impact. Survey findings revealed that a majority believe implicit bias influences jobsite dynamics and that intervention can shift workplace culture. The workshop …

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Students' Evaluations Of Construction Management Curriculum Through A Senior Exit Interview, Anthony J. Roensch Jun 2025

Students' Evaluations Of Construction Management Curriculum Through A Senior Exit Interview, Anthony J. Roensch

Construction Management

This project explored student perspectives on the Cal Poly San Luis Obispo Construction Management program through a two-phase approach: individual interviews and a large group review session. Ten students with varied career goals and levels of involvement in the program were interviewed to understand their views on curriculum quality, industry engagement, extracurricular opportunities, and departmental support. The goal was to identify patterns in feedback across diverse student experiences. Following the interviews, a refined set of questions was developed and presented to a larger group of students in a structured discussion forum. This session provided further insights into both strengths and …

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Son Care Foundation - Pergola Preconstruction, Samuel J. Peters Jun 2025

Son Care Foundation - Pergola Preconstruction, Samuel J. Peters

Construction Management

This paper discusses the design and preconstruction aspects of a pergola constructed at Thousand Hills Pet Resort, supporting a non-profit organization called the Son Care Foundation. Founded in 1994 by Jack Gould, the foundation is committed to fostering hope through various programs including mentorship for students, service dog training for PTSD victims, basic pet training, vehicle repair and turnaround, and dog daycare and lodging. This project serves Son Care Foundation’s dog daycare and lodging program, called Thousand Hills Pet Resort. The program was established in 2005, and all profits are used to fund the other programs operated by the Son …

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Building Confidence, Building Careers: An Industry-Informed Evaluation Of A High School Aec Camp, Madisen Berube Jun 2025

Building Confidence, Building Careers: An Industry-Informed Evaluation Of A High School Aec Camp, Madisen Berube

Construction Management

This study assesses the effectiveness of the Girls Build Summer Academy, an architecture, engineering, and construction (AEC) summer camp for high school girls, and similar programs by gathering and analyzing feedback from industry professionals. The research aims to identify which program elements most successfully inspire interest and build foundational skills for young women considering careers in architecture, engineering, and construction. An anonymous survey was distributed to AEC professionals, some who were familiar with the program. The survey included multiple choice, rankings, and open-ended questions to evaluate areas for improvement and future curriculum development. Findings revealed strong support for interactive learning …

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Skip The Grid: Off-Grid Solutions For Navajo Families, Jordan Badgley Jun 2025

Skip The Grid: Off-Grid Solutions For Navajo Families, Jordan Badgley

Construction Management

Skip the Grid is a service project executed by California Polytechnic State University (Cal Poly) students, Heart of America, and SOLV Energy to provide sustainable power solutions to Navajo families in need. Within the vast, remote landscapes of the Navajo Nation, over 32% of households lack electricity, creating significant challenges for daily life. The 2025 Skip the Grid trip marked Cal Poly’s fourth consecutive year partnering in this impactful initiative. An interdisciplinary team of 20 students from 6 different areas of study, work collaboratively, preparing for months to ensure a successful installation trip in Chinle, Arizona. Over the course of …

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California Polytechnic Design-Build Lab Course, Nicho Domine Jun 2025

California Polytechnic Design-Build Lab Course, Nicho Domine

Construction Management

This paper explores the development and execution of a project-based Design-Build (DB) course implemented at California Polytechnic State University, San Luis Obispo. The course aimed to replicate real-world DB processes in a controlled academic setting, engaging Construction Management and Architecture students in simulated but immersive industry experience. From Request for Qualifications (RFQ) to Final Presentation and Closeout, the course mirrors a typical DB project lifecycle. Through collaborative exercises, students gained exposure to roles and responsibilities, submittals, cost estimating, procurement strategies, risk analysis, virtual coordination, stakeholder communication, and more. This paper describes how a sequence of weekly assignments was structured to …

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2025 Annual Hackathon Redesigning Safety Fall Protection, Cole Lewis Jun 2025

2025 Annual Hackathon Redesigning Safety Fall Protection, Cole Lewis

Construction Management

The Verifying Everyone’s Safety Together (VEST) Hackathon is an annual event organized by construction management and social science students at California Polytechnic State University, San Luis Obispo. Its purpose is to redesign a specific piece of personal protective equipment (PPE) to improve usability, comfort, and inclusivity, with a focus on providing equitable safety for all workers. This hackathon centered on fall protection, specifically safety harnesses, which are essential for protecting workers at height but often lack comfort and user-friendliness. Students, faculty, and industry guests gathered to examine current harness designs and develop practical, worker-informed improvements. The event space was outfitted …

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Hawthorne Elementary Stage Set Construction, Sergio Daniel Manriquez, Alejandro Gonzalez Jun 2025

Hawthorne Elementary Stage Set Construction, Sergio Daniel Manriquez, Alejandro Gonzalez

Construction Management

The Pirate Ship and Playhouse project, undertaken by California Polytechnic State University, San Luis Obispo Cal Poly Construction Management students, aimed to support arts education at Hawthorne Elementary School through the construction of theatrical set pieces for a Peter Pan performance. Initiated by Phil Barlow and guided by Anna Brennen from the school’s staff, the project integrated community service with practical learning in construction management. From initial design and material sourcing to final installation, the team emphasized safety, durability, and aesthetic appeal. Funding and logistical support from local businesses and Cal Poly facilitated the project’s success. This hands-on endeavor not …

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R.A.C.E. Matters Precast Concrete Bench Construction, Camryn E. Berger Jun 2025

R.A.C.E. Matters Precast Concrete Bench Construction, Camryn E. Berger

Construction Management

This paper presents a narrative detailing the design and construction process undertaken by an interdisciplinary team of students from California Polytechnic State University, San Luis Obispo, representing the Construction Management, Architecture, and Architectural Engineering departments. The team collaborated to design, fabricate, and install three precast concrete benches for the nonprofit organization R.A.C.E. Matters. The project began in Fall 2024 and culminated in the installation of the benches at sites managed by the San Luis Obispo Conservancy: Pismo Preserve, the Octagon Barn, and Kathleen’s Overlook. Each bench will serve as a platform for murals, visually depicting diverse racial experiences. This paper …

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Creating An Off-Site Construction Course, Tyler Steven Meehleis Jun 2025

Creating An Off-Site Construction Course, Tyler Steven Meehleis

Construction Management

The construction industry is undergoing a transformation as prefabrication and modular methods become more common across project types. From residential homes to large-scale commercial buildings, offsite construction offers faster timelines, improved quality control, and reduced environmental impact of construction. Despite these advantages, off -site construction has historically been underrepresented in the Construction Management (CM) curriculum at California Polytechnic State University (Cal Poly). While students are well-prepared for traditional project delivery in residential, commercial, and heavy civil sectors, they often graduate with limited exposure to more modern building systems and off-site production techniques. This off-site construction course addresses this gap by …

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Shipping Container Library Project: Preconstruction Strategy And Planning, Chris Lochner Jun 2025

Shipping Container Library Project: Preconstruction Strategy And Planning, Chris Lochner

Construction Management

This report outlines the preconstruction planning phase for the development of a shipping container library to be deployed to a community in Sub-Saharan Africa. The library is designed as a modular and sustainable solution for delivering access to educational resources. Preconstruction efforts have focused on finalizing design documentation, procurement planning, trade coordination, permitting considerations, and site logistics. While no construction has begun, two 40-foot high-cube containers have been ordered—one for prototyping and one for shipment. One container is currently staged at Tilden-Coil Constructors’ yard in Riverside, California, and the project is approaching the procurement and mobilization phase. All tracking of …

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Cal Poly Leaning Pine Arboretum Gazebo, Tyler Higgins Jun 2025

Cal Poly Leaning Pine Arboretum Gazebo, Tyler Higgins

Construction Management

Located on the north end of California Polytechnic State University’s campus, the Leaning Pine Arboretum gazebo stands as a place of gathering, relaxation, and functionality. Taking the place of a smaller existing structure, this project transforms the area, creating new opportunities and laying a foundation for future growth over the coming years. Along the way, several challenges arose, including design complications, permitting issues, and time constraints. Through this process, it became clear that obstacles were inevitable, and overcoming them taught valuable lessons in teamwork, coordination between multiple parties, relationship building, and project management. From September to December 2024, work continued …

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A Review Of Work-Life Balance Among Recent Cal Poly Graduates, Max Murphy Jun 2025

A Review Of Work-Life Balance Among Recent Cal Poly Graduates, Max Murphy

Construction Management

Work-life balance has been a heavily debated topic in the construction industry, especially post-COVID. Due the popularization of the topic as well as the introduction of “hybrid” work schedules among multiple industries the idea of work-life balance within the construction industry has become prevalent. This paper aims to gather data about work-life balance and stress among the construction management industry. A survey was distributed to recently graduated construction management students from California Polytechnic State University – San Luis Obispo to gather quantitative data regarding work-life balance, commuting, work hours, stress, and mental health. This survey also features a voluntary section …

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Designing And Building A Tomato Storage Shed For Slo City Farm, Mark D. Thielmann, Ryan T. Walther Jun 2025

Designing And Building A Tomato Storage Shed For Slo City Farm, Mark D. Thielmann, Ryan T. Walther

Construction Management

This paper details the design, budgeting, and construction of a tomato shed built by a student team for City Farm SLO during the Spring 2025 quarter. The project aimed to deliver a practical, affordable, and long-lasting structure to support tomato harvesting and storage operations. The team prioritized a design that balanced functionality with simplicity, all while working within a tight budget. The design phase involved multiple iterations in response to changing site conditions and client input, requiring the team to remain flexible and responsive throughout the process. Key milestones included developing an initial layout, sourcing materials, and modifying features as …

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Skip The Grid: Delivering Solar Energy To The Navajo Nation, Lucca Giuseppe Pracilio Jun 2025

Skip The Grid: Delivering Solar Energy To The Navajo Nation, Lucca Giuseppe Pracilio

Construction Management

Skip the Grid (STG) is a program where companies within the construction industry come together to better the quality of life for the people of the Navajo Nation. Through collaboration with Goal Zero, SOLV Energy, NEXTracker, and Heart of America, the fourth Skip the Grid Trip installed 40 solar systems on homes within the Chinle region in northeastern Arizona. Officially finishing on March 27th, 2025, the trip not only consisted of providing a service for the people of Chinle but also allowed California Polytechnic State University (Cal Poly) students to learn about the history of the Navajo Nation …

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Skip The Grid: Installing Solar Systems For Residents Of The Navajo Nation In Arizona, Joshua Zepeda Montero Jun 2025

Skip The Grid: Installing Solar Systems For Residents Of The Navajo Nation In Arizona, Joshua Zepeda Montero

Construction Management

An interdisciplinary service-learning program called Skip the Grid provides solar energy systems to Navajo Nation homes without consistent access to electricity. A group of 20 California Polytechnic State University (Cal Poly) students from different majors that include Construction Management, Mechanical Engineers, Business, and Electrical Engineers traveled to Arizona from March 23rd to 27th, 2025, to install Goal Zero solar energy systems on over 40 homes from the Navajo Nation. This project was made possible through the generous support and collaboration of SOLV Energy, Heart of America (HOA), Goal Zero, Chinle High School, and Cal Poly. These solar systems help give …

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Skip The Grid: Energizing Navajo Nation, Eiley Q. Eichten Jun 2025

Skip The Grid: Energizing Navajo Nation, Eiley Q. Eichten

Construction Management

Skip the Grid is an interdisciplinary service project aimed at providing reliable and clean energy to families living in Navajo Nation. Cal Poly partnered with Heart of America, SOLV Energy, and Nextracker to help bring this plan to fruition. Twenty students were selected to contribute to the planning, coordinating, and fundraising for the project. After the preparation was completed, Cal Poly students joined representatives from Heart of America, SOLV Energy, and Nextracker. The trip commenced with a hands-on, productive five day visit to Chinle, Arizona. The first working day commenced with Cal Poly students attending a total of five schools …

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Assessing Fire Risks In San Luis Obispo: The Impact Of Building Construction And Landscaping On Wildfire Vulnerability, Zachary A. Pollock Jun 2025

Assessing Fire Risks In San Luis Obispo: The Impact Of Building Construction And Landscaping On Wildfire Vulnerability, Zachary A. Pollock

Construction Management

As wildfires grow in frequency and intensity across California, understanding and mitigating residential fire risk has become a public safety priority. Communities in the wildland-urban interface (WUI), such as San Luis Obispo, are especially vulnerable due to their proximity to natural vegetation and the prevalence of older housing stock. While state and local agencies have introduced regulations and educational campaigns, there remains a need for accessible, scalable tools that help identify fire risks at the individual home level. This project assessed wildfire vulnerability across 140 homes in San Luis Obispo, California, using a custom visual grading rubric informed by academic …

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Skip The Grid: Empowering Navajo Students Through Solar Energy And Education, Daniela S. Gonzalez Jun 2025

Skip The Grid: Empowering Navajo Students Through Solar Energy And Education, Daniela S. Gonzalez

Construction Management

The Skip the Grid project by our California Polytechnic State University (Cal Poly) team was more than just installing solar panels. It was about making a real difference in people’s lives. We focused on helping families in Chinle, Arizona, a community where many households do not have access to electricity, clean water, or fresh food. These are basic needs that support students’ ability to learn and succeed. Without lights to do homework or warm meals to stay healthy, it becomes harder for kids to concentrate or dream about going to college. To help address these challenges, our team installed solar …

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Assessment Of Mental Wellbeing Programs In The Construction Industry, Evan James Olszak Jun 2025

Assessment Of Mental Wellbeing Programs In The Construction Industry, Evan James Olszak

Construction Management

Mental health problems are very prevalent within the construction industry, and there is not enough attention put towards the mental wellbeing of employees in the industry. The construction industry is ranked #2 for deaths by suicide, and #1 when mining and extraction are included (CDC, 2021). Previous research has been done to understand the severity of the issue, and some programs have been started to spread awareness and train employees. The issue arises in a lack of analysis of these programs. The programs that are being used are still in their infancy and require a comprehensive review to understand the …

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Recommendation To Implement An Offsite Design And Construction & Mass Timber Buildings Tech Elective, Dino Kuljancic Jun 2025

Recommendation To Implement An Offsite Design And Construction & Mass Timber Buildings Tech Elective, Dino Kuljancic

Construction Management

This project presents a proposal for a new upper division elective course in the Construction Management program at Cal Poly, San Luis Obispo. The course would focus on mass timber construction as well as prefabrication and modular construction which are quickly growing areas of the industry known for their sustainability, efficiency, and compatibility with modern construction methods. While mass timber and pre-fabrication content exists in some university programs around the country, Cal Poly’s CM curriculum lacks a course specifically designed to give students practical, construction focused instruction on these topics. To determine student interest, a survey was conducted among current …

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Plumbing System Design For Gateway Decathlon, Philip Soo Jun 2025

Plumbing System Design For Gateway Decathlon, Philip Soo

Construction Management

This senior project focuses on the development of a Sustainable and Efficient Plumbing System for the Gateway Decathlon Modular Housing Unit, a Mass Timber construction. As part of an Integrated Project Design delivery, this project involves a collaborative effort among students from various disciplines, including construction management, architecture, and engineering. Over the past year, teams of students have collaborated to develop architectural drawings, including floor plans, elevations, and system layouts. This project includes the careful selection of plumbing fixtures that align with the performance and sustainability goals of the modular housing unit. In addition, the materials were chosen based on …

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The Cost And Productivity Impacts That A Tower Crane Has On A Jobsite, Gavin Fraysier Jun 2025

The Cost And Productivity Impacts That A Tower Crane Has On A Jobsite, Gavin Fraysier

Construction Management

This paper investigates the cost and productivity impacts that a tower crane has on jobsite productivity. From reviewing recent literature, it is clear the stagnating labor productivity of the industry is a major problem. One way that has been proposed to solve this problem is through the implementation of more sophisticated equipment, for the sake of this paper that equipment is tower cranes. This paper performs an analysis of historical records of a mid-sized framing subcontractor located in central California. This company has recently ventured into the crane business which provided an excellent opportunity to collect data. Having just started …

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