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2025

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Articles 5911 - 5940 of 8613

Full-Text Articles in Engineering

Cal Poly Gateway Decathlon: Cost Estimation And Planning For A Sustainable Mass Timber Home, George Stasinos Mar 2025

Cal Poly Gateway Decathlon: Cost Estimation And Planning For A Sustainable Mass Timber Home, George Stasinos

Construction Management

The Gateway Decathlon is an international collegiate competition that challenges university teams to design, build, estimate, and operate innovative and sustainable housing solutions. Cal Poly SLO’s entry to the competition is a mass timber single family home addressing sustainability, energy efficiency, and climate change issues in California. The research of this paper focuses on cost estimation and project planning concerning equipment and labor specifically. The aim is to create a feasible and accurate construction budget. While previous efforts have been conducted on this project, design changes and new scope additions require a comprehensive reassessment of the material, labor and equipment …

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Modular Construction And Integrated Project Delivery: Cal Poly Slo’S Student Housing Expansion, Nikita Taktarov Mar 2025

Modular Construction And Integrated Project Delivery: Cal Poly Slo’S Student Housing Expansion, Nikita Taktarov

Construction Management

Cal Poly San Luis Obispo is addressing the increasing demand for on-campus housing through an innovative modular dormitory project. This project, which adds approximately 4,000 new beds, marks a shift from traditional construction methods to a more efficient and collaborative approach using the Integrated Project Delivery (IPD) model. Unlike traditional CSU contracts that place most of the risk on contractors, this model promotes shared responsibility between the university, architects, and builders, leading to better cost control and project efficiency. A key feature of this program is the use of prefabricated construction, where building components are assembled off-site and then transported …

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Augmented Reality In Construction, Brendan Trinh Mar 2025

Augmented Reality In Construction, Brendan Trinh

Construction Management

This research focuses on how augmented reality (AR) technology could assist construction projects by increasing quality control, efficiency, and collaboration. AR tools, such as Revizto, overlay 3D models into real-world construction sites, allowing the project teams to test installations and discover issues before they occur. This study aims to determine how AR affects project costs, the construction schedule, and quality. To further understand this, interviews were conducted with McCarthy Builders' Virtual Design and Construction (VDC) employees. They discussed their experiences with AR on active job sites, including its benefits, limitations, and potential improvements. Studies from an internship with McCarthy Builders …

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An Analysis Of Factors Affecting Retention Of Skilled Trades Workers At Construction Companies, James R. Walsh Mar 2025

An Analysis Of Factors Affecting Retention Of Skilled Trades Workers At Construction Companies, James R. Walsh

Construction Management

Construction trades are going through a difficult time in recruiting right now and have been for the past 5 to 10 years. More tradesmen and women from the baby boomer generation are retiring and the rate of replacement by younger people is not enough to keep the workforce at the numbers that would be ideal for a healthy construction industry. This paper delves into what companies can do to make work a place that employees want to be and aims to provide strategies companies can use to retain a quality workforce.

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Cal Poly Construction Spanish Class, Josue E. Basilio Mar 2025

Cal Poly Construction Spanish Class, Josue E. Basilio

Construction Management

This project develops a Construction Spanish & Communication course for Cal Poly’s Construction Management program to address the growing need for bilingual communication on job sites. The course equips students with essential Spanish language skills for safety meetings, work instructions, and team coordination, improving job site efficiency and inclusivity. Deliverables include a detailed course outline in preparation for the semester conversion, curriculum, course catalog entry, and a first-day lecture presentation. The course blends lecture-based instruction with hands-on activities like role-playing, translation exercises, and real-world simulations. Assessments include scenario-based quizzes, a reflection essay, participation grading, and a final exam to ensure …

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Bike Lane Improvement Proposal On Foothill Boulevard, Victor Wan Mar 2025

Bike Lane Improvement Proposal On Foothill Boulevard, Victor Wan

Construction Management

This project focuses on improving bike lane safety on Foothill Boulevard, a critical commuter route in San Luis Obispo. Outdated and unprotected lanes pose serious risks to cyclists due to high vehicle speeds, faded markings, and a lack of physical separation. This proposal introduces safety improvements, including steel bollards and armadillo humps for protection, high-visibility thermoplastic lane markings, and concrete refuge islands at key intersections. The study evaluates engineering challenges, material selection, installation methods, and cost implications to enhance cyclist safety and promote sustainable transportation.

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Effect Of Wall Assemblies On Wi-Fi 6e Signal Strength, Connor C. Borges Mar 2025

Effect Of Wall Assemblies On Wi-Fi 6e Signal Strength, Connor C. Borges

Construction Management

This project investigates the signal strength of Wi-Fi signals through different wall assemblies under the new Wi-Fi 6E standard. The project focuses on measuring the signal strength (-dBm) at three distinct frequencies, 6 GHz, 5 GHz, and 2.4 GHz. The 2.4 GHz and 5 GHz frequencies serve as a baseline for comparison with the emerging 6E standard. Wi-Fi 6E offers much higher speeds at the cost of high signal attenuation. The primary objective is to analyze how different construction materials impact Wi-Fi signal strength and to provide comprehensive data on wall assembly attenuation. Wi-Fi 6E signals experience significantly greater attenuation …

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Drilled Displacement Columns As A Method To Mitigate San Francisco 'Bay Mud', Cole Soderman Mar 2025

Drilled Displacement Columns As A Method To Mitigate San Francisco 'Bay Mud', Cole Soderman

Construction Management

This case study investigates the process of drilled displacement columns as a substitute for traditional pile foundations. The setting for the project is in California's infamous 'bay mud' which poses in the form of building settlement. The case study begins with a run down of what drilled displacement columns are compared to traditional pile foundations. To gain a diverse perspective several parties were interviewed on the process of drilled displacement columns. The interviewees include members of the general contractor's team, the subcontractor, and the Owner's Representative. The universal positives were time and materials which result in reducing the price for …

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Asphalt Rubber Chip Seals A Cost Effective And Sustainable Solution For Road Infrastructure, Gunnar C. Bertsch Mar 2025

Asphalt Rubber Chip Seals A Cost Effective And Sustainable Solution For Road Infrastructure, Gunnar C. Bertsch

Construction Management

Asphalt Rubber Chip Seals provide a durable, cost effective, and environmentally friendly alternative to traditional paving methods by incorporating recycled waste tires. This study evaluates Asphalt Rubber Chip Seals implementation in Arizona and Michigan comparing its effectiveness to conventional paving approaches and the current applications in California. Variations in state funding for road maintenance significantly impact infrastructure quality and longevity, influencing the choice of paving solutions. ARCS has demonstrated resilience in extreme weather conditions, making it a viable option for expansion to states like Arizona and Michigan, where climate variations pose challenges for pavement longevity. The research assesses construction costs, …

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Development Of A Work Plan For The Mass Timber Installation Phase In The Gateway Decathlon, Eduardo Contreras Mar 2025

Development Of A Work Plan For The Mass Timber Installation Phase In The Gateway Decathlon, Eduardo Contreras

Construction Management

This project was the development of detailed work plan for the installation of mass timber components in the Gateway Decathlon project, which emphasizes sustainable construction practices aimed at reducing environmental impact. The work plan provides a step-by-step guide for the efficient and safe assembly of structural elements, covering the sequence of tasks, necessary materials and tools, safety procedures, and quality checks to ensure proper execution. By connecting theoretical design concepts with practical construction activities, the plan addresses various logistical challenges encountered during building phases. It highlights the advantages of using mass timber, such as reduced carbon emissions and reliance on …

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The Utilization Of Ai To Improve Efficiency In Construction Management, Sam Balestreri Mar 2025

The Utilization Of Ai To Improve Efficiency In Construction Management, Sam Balestreri

Construction Management

The construction industry is undergoing a technological transformation, with artificial intelligence emerging as a tool to enhance efficiency, communication, and decision-making. However, the industry has been slow to adopt these advancements due to challenges in integrating new technologies with traditional workflows. This research examines the potential of AI to improve construction management by automating processes such as submittal logs and scope of work documents. The study evaluates ProjectEngineer.ai, an AI-powered co-pilot, to determine its impact on workflow efficiency, writing enhancement and precision, and project outcomes. An analysis of AI-assisted document management methods was conducted in CM 411 Specialties Construction Management, …

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Assessing Experiences Of Women In Mep Field And Project Management Roles, Lily K. Brown Mar 2025

Assessing Experiences Of Women In Mep Field And Project Management Roles, Lily K. Brown

Construction Management

Despite increased enrollment of women in construction education programs, the industry is not seeing significant gains in the percentages of women, especially in field and project management roles. This study looks specifically at the experiences of women in the Mechanical, Electrical, and Plumbing (MEP) sector working in field and project management. Women in different career stages were interviewed to gain perspective on the state and climate of the industry from a woman’s perspective. The interviews were analyzed for recurring themes and three primary themes that emerged were: 1) women see themselves as able to bring about better team synthesis than …

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Dynamic Tensile Properties Of Thermally Treated Concrete Specimens Subjected To Varied Heating Rates: An Investigation Using The Digital Image Correlation Method, Ronghua Shu, Jiabao Cheng, Guang Xu, Yuzhang Lai, Lijinhong Huang Mar 2025

Dynamic Tensile Properties Of Thermally Treated Concrete Specimens Subjected To Varied Heating Rates: An Investigation Using The Digital Image Correlation Method, Ronghua Shu, Jiabao Cheng, Guang Xu, Yuzhang Lai, Lijinhong Huang

Mining Engineering Faculty Research & Creative Works

In concrete engineering, high temperatures at varying heating rates significantly affect the stability of concrete structures. In this paper, the dynamic tensile characteristics were investigated on concrete specimens subjected to heating rates ranging from 2 to 40 °C/min, using the digital image correlation (DIC) method. The results reveal a critical heating rate threshold, between 5 and 10 °C/min, which marks a shift in the influence of heating rates on both physical and dynamic tensile properties. Below this threshold, changes are minimal, but beyond it, significant effects are observed. As the heating rate increases, longitudinal wave velocity, density, and mass decrease, …

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Local Chemical Ordering Of A Neutron-Irradiated Crfemnni Compositionally Complex Alloy, Nathan Curtis, Sohail Shah, Mukesh Bachhav, Kaustubh Bawane, Fei Teng, Calvin Parkin, Tiankai Yao, Haiming Wen, Adrien Couet Mar 2025

Local Chemical Ordering Of A Neutron-Irradiated Crfemnni Compositionally Complex Alloy, Nathan Curtis, Sohail Shah, Mukesh Bachhav, Kaustubh Bawane, Fei Teng, Calvin Parkin, Tiankai Yao, Haiming Wen, Adrien Couet

Materials Science and Engineering Faculty Research & Creative Works

While ion-irradiation studies are a critical first step in studying compositionally complex alloys (CCAs) for nuclear applications, they do not capture all the microstructural changes occurring under the low irradiation dose rates and different particles' scattering patterns experienced in a nuclear reactor setting. To explore these phenomena in reactor-relevant conditions for the first time in CCA, the single-phase solid-solution Cr10Fe30Mn30Ni30 was neutron irradiated up to 6.61 displacements per atom at 395 and 579 °C. Irradiation-enhanced local chemical ordering (LCO) well beyond the range of short range ordering was observed, and is predicted to be the precursor to the precipitation of …

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The Effect Of Mold Flux Wetting Conditions With Varying Crucible Materials On Crystallization, Muhammad Anwarul Nazim, Arezoo Emdadi, Todd Sander, Ronald O'Malley Mar 2025

The Effect Of Mold Flux Wetting Conditions With Varying Crucible Materials On Crystallization, Muhammad Anwarul Nazim, Arezoo Emdadi, Todd Sander, Ronald O'Malley

Materials Science and Engineering Faculty Research & Creative Works

Understanding mold flux crystallization is essential for assessing heat transfer during steel casting. The complexity of the mold gap presents challenges in identifying the optimal testing method and nucleation type. This study investigates how variations in wetting properties influence nucleation dynamics, in particular the wetting behaviors of mold flux in platinum and graphite crucibles and how they affect crystallization temperatures and solidification mechanisms. Advanced analytical techniques, including confocal laser scanning microscopy (CLSM), and differential scanning calorimetry (DSC) were employed to analyze nucleation under different conditions, with calibration using synthetic slag, Li2SO4, and thermodynamic equilibrium simulations. The findings highlight the crucial …

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Introduction Of An Industial Construction Topics Course In The Cal Poly Cm Curriculum, Connor N. Merz Mar 2025

Introduction Of An Industial Construction Topics Course In The Cal Poly Cm Curriculum, Connor N. Merz

Construction Management

The industrial construction sector represents a significant portion of the construction industry, yet it remains underrepresented in many academic programs, including the Construction Management (CM) curriculum at California Polytechnic State University (Cal Poly). This research investigates the feasibility and interest in introducing a dedicated industrial construction elective course to bridge this gap. A student survey was conducted to assess interest levels and determine relevant topics for the course, while an industry interview provided professional insight into necessary competencies. Survey results indicated strong student interest, with 71% expressing a willingness to take the course. The study identified key topics such as …

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Comparing The Work-Life Balance And Stress At General Contractors And Cm Agencies, Lucca A. Arcolino Mar 2025

Comparing The Work-Life Balance And Stress At General Contractors And Cm Agencies, Lucca A. Arcolino

Construction Management

The struggle for a work-life balance has become a significant issue in the construction industry, resulting in personal and organizational challenges. This paper will compare work-life balance and stress between industry professionals working at a CM agency and those at a general contractor. A CM agency is responsible for overseeing the construction project alongside the owner by providing planning, cost estimation, scheduling, and quality assurance. In contrast, the general contractor is responsible for managing the day-to-day operations on-site. A survey was distributed to both types of construction firms to collect data about work hours, work-life balance, stress, and biggest stressors. …

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Deep Learning-Based Gain Estimation For Multi-User Software-Defined Radios In Aircraft Communications, Viraj K. Gajjar, Kurt L. Kosbar Mar 2025

Deep Learning-Based Gain Estimation For Multi-User Software-Defined Radios In Aircraft Communications, Viraj K. Gajjar, Kurt L. Kosbar

Electrical and Computer Engineering Faculty Research & Creative Works

It may be helpful to integrate multiple aircraft communication and navigation functions into a single software-defined radio (SDR) platform. To transmit these multiple signals, the SDR would first sum the baseband version of the signals. This outgoing composite signal would be passed through a digital-to-analog converter (DAC) before being up-converted and passed through a radio frequency (RF) amplifier. To prevent non-linear distortion in the RF amplifier, it is important to know the peak voltage of the composite. While this is reasonably straightforward when a single modulation is used, it is more challenging when working with composite signals. This paper describes …

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Dartbot: Overhand Throwing Of Deformable Objects With Tactile Sensing And Reinforcement Learning, Shoaib Aslam, Krish Kumar, Pokuang Zhou, Hongyu Yu, Michael Yu Wang, Yu She Mar 2025

Dartbot: Overhand Throwing Of Deformable Objects With Tactile Sensing And Reinforcement Learning, Shoaib Aslam, Krish Kumar, Pokuang Zhou, Hongyu Yu, Michael Yu Wang, Yu She

School of Industrial Engineering Faculty Publications

Object transfer through throwing is a classic dynamic manipulation task that necessitates precise control and perception capabilities. However, developing dynamic models for unstructured environments using analytical methods presents challenges. In this study, we present DartBot, a robot that integrates tactile exploration and reinforcement learning to achieve robust throwing skills for nonrigid relatively small objects under the influence of moment of inertia which cause the object to spin in the air. Unlike traditional sim-to-real transfer methods, our approach involves direct training of the agent on a real hardware robot equipped with a high-resolution tactile sensor, enabling reinforced learning in a realistic …

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Characterization, Performance, And Toxicological Assessment Of Polysulfone-Sulfonated Polyether Ether Ketone Membranes For Water Separation Applications, Muhammad Usman Yousaf, Lucca Madeo Cortarelli, Nerissa I. Jebet, Jason M. Unrine, Nirupam Aich, Olga V. Tsyusko, Isabel C. Escobar Mar 2025

Characterization, Performance, And Toxicological Assessment Of Polysulfone-Sulfonated Polyether Ether Ketone Membranes For Water Separation Applications, Muhammad Usman Yousaf, Lucca Madeo Cortarelli, Nerissa I. Jebet, Jason M. Unrine, Nirupam Aich, Olga V. Tsyusko, Isabel C. Escobar

Markey Cancer Center Faculty Publications

The removal of small molecular weight charged compounds from aqueous solutions using membrane remains a challenge. In this study, polysulfone (PSf)- and sulfonated polyether ether ketone (SPEEK)-based membranes were fabricated via non- solvent induced phase separation process (NIPS) using N-Methyl-2-Pyrrolidone (NMP) as solvent and water as non-solvent. Membranes were characterized structurally and morphologically, followed by toxicity assessment conducted before and after filtration, both with and without annealing at various pH values to evaluate potential leaching of trapped solvent from the membrane pores. Additionally, membrane performance was characterized using binary mixtures of cationic and anionic dyes. The results demonstrated selective filtration …

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Are Emojis The New Words? A Sentiment Analysis Of Social Media Brand Conversations, Yashodhan Karulkar, Dev T. Vora, Siddharth Vaddepalli, Yash Thakur Mar 2025

Are Emojis The New Words? A Sentiment Analysis Of Social Media Brand Conversations, Yashodhan Karulkar, Dev T. Vora, Siddharth Vaddepalli, Yash Thakur

Journal of International Technology and Information Management

Emojis have become an increasingly important aspect of consumer-brand interactions in the Indian subcontinent. However, the impact of emoji use on brand image and mental health remains underexplored, particularly in emerging economies like India, where structured research on this topic is limited. To address this gap, the present study analyzes over 4,600 consumer tweets related to 19 prominent brands across eleven industries. Using VADER sentiment analysis, the research develops a metric to assess consumer sentiment and brand engagement in relation to emoji usage. The findings indicate that effective integration of emojis contributes to positive consumer sentiment and enhanced brand engagement. …

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Overexpression And Biophysical And Functional Characterization Of A Recombinant Fgf21, Phuc Phan, Jason Hoang, Thallapuranam Krishnaswamy Suresh Kumar Mar 2025

Overexpression And Biophysical And Functional Characterization Of A Recombinant Fgf21, Phuc Phan, Jason Hoang, Thallapuranam Krishnaswamy Suresh Kumar

Chemistry & Biochemistry Faculty Publications and Presentations

Fibroblast growth factor 21 (FGF21) is an endocrine FGF that plays a vital role in regulating essential metabolic pathways. FGF21 increases glucose uptake by cells, promotes fatty acid oxidation, reduces blood glucose levels, and alleviates metabolic diseases. However, detailed studies on its stability and biophysical characteristics have not been reported. Herein, we present the overexpression, biophysical characterization, and metabolic activity of a soluble recombinant FGF21 (rFGF21). The far-UV circular dichroism spectra of rFGF21 show a negative trough at 215 nm, indicating that the protein’s backbone predominantly adopts a β sheet conformation. rFGF21 shows intrinsic tyrosine fluorescence at 305 nm. Thermal …

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Creating And Analyzing Space Vehicle Seit/Pm Factors, Jordan A. Bosco Mar 2025

Creating And Analyzing Space Vehicle Seit/Pm Factors, Jordan A. Bosco

Theses and Dissertations

The Department of Defense relies on accurate cost estimation to inform budget decisions. Beyond being a critical component of the Defense Acquisition System, cost estimation is a legal requirement in the budgeting process. Cost analysts, therefore, have both a fiduciary and statutory responsibility to produce realistic estimates. Among the many elements of a space system cost estimate is Space Vehicle Systems Engineering, Integration & Test, and Program Management (SEIT/PM). While existing factors aid in estimating SEIT/PM, Space Systems Command is interested in research in alternatives to the current methods and crosschecks for those methods. This study develops a set of …

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The Application Of Decision Analysis Theory For Space Allocation At The Air Force Institute Of Technology, Damian N. Soriano Mar 2025

The Application Of Decision Analysis Theory For Space Allocation At The Air Force Institute Of Technology, Damian N. Soriano

Theses and Dissertations

This thesis investigates the application of Decision Analysis Theory to optimize space allocation at the Air Force Institute of Technology (AFIT). Through a Multi-Objective Decision Analysis (MODA) framework, this study addresses existing methodologies for space allocation in military, academic, and office settings; the rules, limitations, and factors influencing space utilization at AFIT; and approaches to improve office and lab allocations for institutional efficiency and fairness. This research incorporates qualitative and quantitative metrics, including faculty and student data, research outputs, and historical space usage. These findings highlight significant complexities in space allocation, particularly in reconciling administrative and research requirements with structural …

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Quantum Ghost Imaging Through An Atmospheric Turbulence Simulator, Mikaela R. Morris Mar 2025

Quantum Ghost Imaging Through An Atmospheric Turbulence Simulator, Mikaela R. Morris

Theses and Dissertations

The use of single photons and photon pairs has become a cornerstone for new developments in the sensing and imaging community for their ability to improve image resolution and signal to noise readings in low light environments and large standoff distances. Quantum imaging techniques have an ability to overcome the fundamental limits of classical imaging, like diffraction. Quantum ghost imaging, a specific type of quantum imaging, uses a bi-photon pair produced during the process of spontaneous parametric down conversion to produce an image. The pair is split using a beam splitter, the signal photon is transmitted through an aperture and …

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Deep Reinforcement Learning For Leo Satellite Grouping, James E. Minteer Mar 2025

Deep Reinforcement Learning For Leo Satellite Grouping, James E. Minteer

Theses and Dissertations

This research investigates jamming evasion using DRL to provide an autonomous solution that repositions a geostationary satellite experiencing directed, terrestrial based jamming. Second, this thesis applies DRL to an area of research for LEO satellite constellations, user grouping, using a portion of an Air Force Research Lab reinforcement learning framework. As LEO satellites orbit the earth, they must constantly re-evaluate not only which users they are able to connect to, but on which of its multiple beams. This model succeeds in finding a balance between maximizing signal strength and minimizing overhead from switching user assignments, all while requiring fewer costly …

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Yolot: A Recurrent Yolo Model For Robust Video-Based Automotive Object Detection, Dylan Jay Baxter Mar 2025

Yolot: A Recurrent Yolo Model For Robust Video-Based Automotive Object Detection, Dylan Jay Baxter

Master's Theses

Though incredibly effective at detecting objects in isolated frames, modern object detection models are often not designed to take advantage of information present in previous frames of a video stream, despite that data being readily avail- able. To address this shortcoming, this paper proposes YOLOT, a modification of the widely used YOLOv8 object detection model, which seeks to utilize this temporal information with the addition of recurrent structures. In the design of YOLOT, a series of recurrent convolutional modules were inserted at backbone and neck outputs and the final and most effective design was found to be the insertion of …

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Float Element Design, Bryn Lewis Mar 2025

Float Element Design, Bryn Lewis

Liberal Arts and Engineering Studies

I have spent the last three years as a Design team member of Cal Poly Rose Float, the last year as a Design Lead. As a member of the design team, I followed blueprints, bent pencil steel into shape, and welded those pieces together. I worked as part of a team, and eventually led my own small team. Cal Poly Rose Float teaches its members many skills and abilities. Not just bending and welding metal, but also teamwork and leadership skills. However, it doesn’t teach us everything. Every leadership member gives input on the overall theme and design of the …

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End-To-End (E2e) Model-Based Systems Engineering (Mbse) Framework, Joshua Adelabu, Bhushan Lohar Mar 2025

End-To-End (E2e) Model-Based Systems Engineering (Mbse) Framework, Joshua Adelabu, Bhushan Lohar

Shelby Hall Graduate Research Forum Presentations

This presentation explores the latest advancements in systems engineering, with a particular focus on Model-Based Systems Engineering (MBSE). It covers key definitions, benefits, applications, and challenges associated with these methodologies, as well as analyzes current frameworks and research methodologies in the field.

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Advancing Sustainable Road Construction With Cold Mix Rap And Rejuvenator, Abeeb G. Oyelere Mar 2025

Advancing Sustainable Road Construction With Cold Mix Rap And Rejuvenator, Abeeb G. Oyelere

Shelby Hall Graduate Research Forum Presentations

Presentation slides for a presentation given at the 1st annual Shelby Hall Graduate Research Forum at the University of South Alabama.

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