Civil and Environmental Engineering Commons^™

Streamlining Public Engagement In Transportation Projects Using Text Analytics, Alireza Shamshiri

Civil Engineering Dissertations - Archive

Infrastructure projects impact a broad range of stakeholders, particularly local communities, whose engagement is critical for successful outcomes. Despite the importance of public engagement in these projects, traditional methods of capturing and analyzing public opinion often fail to fully represent the diverse, genuine perspectives involved. This has led to conflicts between community members and project sponsors. On the other hand, despite advancements in text analytics, including natural language processing (NLP) and its subfields such as topic modeling, sentiment analysis, and neural networks, their functionalities and effectiveness in analyzing public opinion in the domain of infrastructure projects have not been fully …

Roles Of Vegetation On Soil Moisture Dynamics In Transitional Climates- Lessons From Improving Phenology Representation In Land Surface Model And Retrieval Algorithm, Farhad Hassani

Civil Engineering Dissertations - Archive

Soil moisture is a critical component of the terrestrial water and energy cycles, influencing key hydrological and atmospheric processes such as infiltration, runoff generation, evapotranspiration, and atmospheric boundary layer dynamics. Accurate representation of soil moisture is essential for reliable hydrological modeling, drought monitoring, and seasonal to sub-seasonal (S2S) weather forecasting. Vegetation significantly affects soil moisture dynamics through processes like transpiration, canopy interception, and root water uptake, especially in transitional climates where conditions fluctuate between arid and humid states. However, errors in vegetation phenology representation can lead to substantial biases in soil moisture estimates within land surface models (LSMs) and satellite …

Development And Application Of Teems (Telecommuting Expectation Models): Predicting Post-Pandemic Telecommuting Choice And Frequency Using Machine Learning Models, Aiswarya Acharath Mohanakrishnan

Civil Engineering Dissertations - Archive

Telecommuting, increasingly prevalent in today's workforce, has gained significant momentum amid the pandemic-induced shift towards remote work. It altered the travel behavior of workers and their travel patterns. This evolution prompts a reevaluation of worker travel behavior, necessitating adjustments in travel demand modeling to optimize transportation planning and service provision. Using the commuter’s data from a typical pre-pandemic workday to model the travel demand of weeks or years in the future is outdated. In designing transportation systems for the future, Metropolitan Planning Organizations (MPOs) will thus need to account for change in work trips due to telecommuting, and how this …

Moisture And Glass Transition Temperature Kinetics From Long Term Hygrothermal Aging Of Carbon/Epoxy Composites, Behnaz Hassanpour

Civil Engineering Dissertations - Archive

The durability of fiber reinforced polymer composites used in civil infrastructure rehabilitation has become increasingly critical, especially under long-term hygrothermal aging conditions. This study focuses on the results of long-term (up to 6 years) hygrothermal aging of wet layup carbon/epoxy composites and investigates the effects of moisture, as well as accelerated aging at elevated temperatures with varying thicknesses and fabric areal weights. The primary objective is to establish a comprehensive understanding of moisture uptake kinetics and its subsequent effects on the glass transition temperature (T_g), mechanical performance, and the resulting implications for material durability. Four papers form …

Environmental Sustainability, Healthcare Workers And Healthcare Students: A Literature Review Of Attitudes And Learning Approaches, Pamela R. Mccauley, Kavita Mathur, Reza Kamali Miab, Nina Cohen, Kedena Henriques-Thompson, Jyo Gopinath

Health Professions Education

Purpose: Today, increased attention has been placed on the healthcare industry and its workers in the wake of the global COVID-19 pandemic. Increases in facemask production, personal protective equipment, and the number of patients admitted into hospitals have resulted in a sharp rise in medical waste and environmental concerns. This has led to a greater interest by the research community to study the type of training and education that healthcare workers and students receive which could facilitate the implementation of sustainability activities during their work.

Design/Methodology: We have conducted a literature review (2010 to 2024) on healthcare worker …

A Concept Of Producing Aluminum In-Situ On The Moon Through Molten Salt Electrolysis, Jacob N. Ortega, Jeffrey Smith, Fateme Rezaei, David Bayless, William Schonberg, Daniel Stutts, Daoru Han

Materials Science and Engineering Faculty Research & Creative Works

This paper presents a concept of producing aluminum in-situ on the lunar surface, namely, the Lunar In-Situ Aluminum Production through Molten Salt Electrolysis (LISAP-MSE) method developed at Missouri University of Science and Technology. This paper aims to demonstrate the use of electro-deoxidation to reduce aluminum oxide (i.e., alumina) into aluminum and oxygen gas via electrolysis in a molten salt bath for the production of aluminum on the Moon. It is shown that with a steady supply of hydrogen chloride, this in-situ resource utilization (ISRU) method could supply several necessary materials consumed in the electro-deoxidation process except hydrogen chloride to produce …

Skilled Worker Shortage Across Key Labor-Intensive Construction Trades In Union Versus Nonunion Environments, Tamima Elbashbishy, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Skilled labor plays a crucial role in ensuring that construction projects are completed on time, within budget, and to the required standards of quality and safety. However, the construction industry has been facing a labor shortage in recent years, which poses a significant challenge to the industry's growth and sustainability. Therefore, it is important to examine the characteristics of the construction skilled labor market to understand the factors that contribute to the shortage of skilled workers and develop strategies to address the issue. This paper fills this knowledge gap. To this end, the authors (1) collected and processed project documentation …

An Agent-Based Cellular Automaton Simulation Model To Study Worker Safety Behavior On Construction Sites: The Impacts Of Different Social Influence Rules, Rayan H. Assaad, Mohamad Abdul Nabi, Ghiwa Assaf, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The unsafe behavior of the construction workforce is one of the leading causes of accidents in the construction industry. It has been shown that construction laborers perceive the safety behavior of their co-workers and adjust their personal safety attitudes accordingly. Thus, there has been an increasing attention to studying the impacts of the social influence and norms on the safety behavior of construction workers. While existing studies examined the factors that influence the safety behavior of the construction workforce, there is little-to-no research that specifically focused on modeling the role of social influence on the safety behavior of the workers. …

A Contractual Approach To Resolving Disputes Arising From Failure To Achieve Green Certification, Bahaa Chammout, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Green Construction Is An Approach To Reducing The Environmental Impact Of Resource-Intensive Construction. Several Certification Systems Have Been Devised And Are Globally Recognized To Provide Green Building Rating Frameworks. While A Building Can Be Designed To Achieve A Green Rating, The Rating Is Achieved Based On The Completed Facility's Actual Measured Performance. There Had Previously Been Limited Attempts To Give An In-Depth Examination Of The Remedies For Unrealized Green Ratings. As Such, This Paper Addresses This Knowledge Gap Using A Multistep Research Methodology. First, The Authors Analyzed And Classified The Nature Of Damages Resulting From Failed Green Certification Under The …

Assessing The Impact Of Skilled Labor Shortages On Project Cost Performance, Tamima S. Elbashbishy, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Over The Past Decade, There Has Been A Notable Increase In Skilled Labor Shortages Within The Construction Industry. This Shortage Has Numerous Negative Consequences On Construction Projects, Such As Delays In Completion, Compromised Quality, And Higher Costs. Therefore, The Goal Of This Paper Is To Examine The Extent Of Skilled Labor Shortages Observed Throughout The Industry And Their Impact On The Cost Performance Of Construction Projects. To Achieve This Goal, The Authors Identified 10 Key Construction Trades That Heavily Rely On Skilled Labor. Subsequently, An Industry Survey Was Conducted To Measure The Extent Of Skilled Labor Shortages, As Well As …

Predicting Construction Costs Under Uncertain Market Conditions: Probabilistic Forecasting Using Autoregressive Recurrent Networks Based On Deepar, Ghiwa Assaf, Rayan H. Assaad, Islam H. El-Adaway, Mohamad Abdul Nabi

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Projects Often Experience Cost Overruns Due To Market Uncertainty And Price Escalations. Traditional Cost Estimation Methods That Rely On Point Estimation Are Incapable Of Providing Prediction Intervals As Well As Probabilistic Assessment. Thus, There Is Need For An Innovative Approach To Predict The Changes And Uncertainties In Construction Material Costs. This Paper Proposes A Novel Stochastic Model To Estimate Construction Material Costs By Applying Probabilistic Forecasting Using Autoregressive Recurrent Networks. First, Price Data Was Collected For Four Different Construction Materials. Second, Data Was Divided Into A Training Set (Pre-COVID-19) And A Testing Test (Post-COVID-19). Third, The State-Of-The-Art DeepAR Algorithm Was …

Circular Economy Strategies For Decarbonization Of The Built Environment Value Chain Scope 3 Emissions: A Network Analysis, Radwa Eissa, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

With The Anticipated Growth In Construction Activities, Minimizing Value Chain Emissions, Including Those Attributed To Activities Beyond An Organization's Direct Control - Aka "Scope 3" Emissions, And Adopting Circular Economy (CE) Practices Have Become Critical To Attaining The 2050 Climate Goals. Extant Literature Lacks A Value-Chain-Comprehensive Set Of CE Strategies On One Hand, And An Analysis Of Their Actual Project Applications On The Other. This Research Aims To Build A Holistic Portfolio Of CE Actionable Strategies That Span Across The Entire Built Environment Value Chain, Analyzing Their Extent Of Implementation And Interlinkages Within The Literature Versus Actual Projects. To This …

Photogrammetry-Based Method For Measuring Volume Changes Of Soil Specimens During Critical Phases Of Triaxial Testing, Sara Fayek, Xiong Zhang, Pingxin Xia

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Triaxial tests has been routinely used to measure the stress–strain relationship for geomaterials. During triaxial testing, many sources of errors that cannot be completely avoided but are often ignored or approximated using empirical equations. This paper presents a systematic investigation of soil volume change, volume strain nonuniformity, and cross-sectional calculation along the specimen during triaxial testing using a photogrammetry-based method. Consolidated drained triaxial tests were performed in which two parallel measurements were taken: (1) relative volume using the conventional triaxial testing and (2) absolute volume using the photogrammetry-based method. The difference in the observed volume and void ratio measurements between …

Scshm Benchmark Study On Bridge In-Service Structural Monitoring, Maria Pina Limongelli, Doug Thomson, Sreenivas Alampalli, Aftab Mufti, Thomas Schumacher, Luca Martinelli, Othmane Lasri, Harry Shenton, Genda Chen, Mohammad Noori, Farnaz Raeisi, Ahmed Silik, Ji Dang, Ray Hoemsen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The mission of the Society of Civil Structural Health Monitoring (SCSHM, previously known as ISHMII) is to advance the understanding and application of structural monitoring methodologies for the management of civil infrastructure systems. To enable comparative and contrasting studies of various monitoring issues and technologies, the SCSHM Committee on Data-Enhanced Infrastructures Management (DEIMC) identified the need for benchmark problems in the areas of bridge and building structural monitoring. This article reports and briefly discusses the first benchmark study on in-service structural monitoring of bridges that was developed in collaboration with the University of Manitoba, and presents the structure details, study …

Mouralherwaqh Coastal Wetland Road Crossing Da'luk, Natalie Mendez

Cal Poly Humboldt theses and projects

The integration of Indigenous and Western science plays an essential role in Tribally led collaborations for land management. This process of woven sciences is rooted in reciprocal relations and partnerships guided by Tribal Nations. Our cohort was invited by Wiyot Tribal Representatives to investigate a culvert located within the wetlands of Mouralherwaqh— a parcel of land reacquired by the Wiyot Tribe in 2022. This document seeks to share our experience and analysis as part of the Wiyot Tribe’s broader journey in navigating ecocultural restoration projects within Mouralherwaqh. The four community interests we investigated for the wetland crossing included a resized …

Unveiling Travel Patterns With The Next-Generation Passive Mobile Origin And Destination (Od) Data From The National Household Travel Survey, Muthumari Anbumani, Srinivas S. Pulugurtha

Kentucky Transportation Center Presentations

No abstract provided.

Extrinsic Calibration Of 3d Lidar Using Sphere Targets And Target-Centered Gps, Xinyu Cao, Sean Brennan

Kentucky Transportation Center Presentations

No abstract provided.

Motorcycle Crash Risk And Risk-Taking Behaviors: An Analysis For Costa Rica, Jonathan Aguero-Valverde, Jessica Álvarez López, Darío Vargas Aguilar

Kentucky Transportation Center Presentations

No abstract provided.

Analysis Of Factors Associated With The Frequency Of Turning Vehicle-Bicycle Crashes At Signalized Intersections, Faria Raha, Brendan J. Russo, Anthony M. Eschen, Steven R. Gehrke, Edward J. Smaglik

Kentucky Transportation Center Presentations

No abstract provided.

A Neuroscientific Approach For Investigating Mental Fatigue Biomarkers In Simulated Driving Trials, Andrea Giorgi, Manuel Picardi, Vincenzo Ronca, Simone Sportiello, Marco Petrelli, Carlo Polidori, Marteyn Van Gasteren, Arnab Barua, Mobyen Uddin Ahmed, Fabio Babiloni, Gianluca Di Flumeri

Kentucky Transportation Center Presentations

No abstract provided.

Can Temporary Signs Remind Who Should Yield At Uncontrolled Intersections? – A Driving Simulator Study, Kirti Mahajan, Saumik Sakib Bin Masud, Grace Savoie, Alexandra Kondyli

Kentucky Transportation Center Presentations

Background: A generic right of way (ROW) rule at uncontrolled intersections is to yield to the vehicle from the right, if not stated otherwise in the right-hand side driving countries such as the US. However, this rule is greatly neglected in practice, resulting in unsafe situations. This study investigated the effectiveness of using two proposed temporary yield signs: “Yield to Traffic on right” (Sign1_YT) and “Yield to Person on right” (Sign2_YP), to remind the drivers of ROW rule at uncontrolled intersections. Method: A driving simulator experiment was conducted with 20 drivers (aged 18-65 years), 50% males, recording observations for 198 …

Parametric Study Of The Effect Of Increased Magnetic Field Exposure On Microalgae Chlorella Vulgaris Growth And Bioactive Compound Production, Sharanabasaweshwara Asundi, Sanurag Rout, Simone Stephen, Sanghamitra Khandual, Sandipan Dutta, Sandeep Kumar

Mechanical & Aerospace Engineering Faculty Publications

This parametric study aimed to analyze the effects of increased magnetic field exposure (MFE) on the growth and production of the bioactive compounds of Chlorella (C.) vulgaris. With the intent of studying the effect of an increased MFE, the magnetic field typically experienced by life on Earth was amplified by an order of magnitude. In the increased-MFE environment, six treatments of C. vulgaris with two repetitions for each treatment were exposed to a magnetic field of 5 Gauss (500 µT) about each axis, which was generated in a state-of-the-art Helmholtz cage. The treatments and the control were characterized by the …

Estimation Of Origin-Destination Matrix Using Open-Source Applications Based On Traffic Counts For Mansoura City In Egypt, Ahmed N. Awaad, Sherif M. El-Badawy, Elsayed Abd-Elazem Shwaly, Usama Elrawy Shahdah

Mansoura Engineering Journal

Origin-destination matrices (ODMs) are essential to transportation planning but estimating them can be difficult and expensive. This study presents a framework for estimating ODMs using traffic flow counts using open-source tools. The framework was applied to a dataset from the city of Mansoura in Egypt. The Flowrouter algorithm, which is part of the SUMO microscopic traffic simulation model, was used for routing traffic between traffic flow counting locations. Additionally, the “Implausible Routes” algorithm was used to eliminate unrealistic routes from the generated solution. The results show that the ODM obtained is a reasonable representation of the demand between the different …

Exploring The Enablers And Barriers Of Stakeholder's Collaboration Of Maas Platform: A Case Study Of Bangkok, Sirawit Chinvanichai

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research investigates the implementation of Mobility as a Service (MaaS) to address fragmented transport services in Bangkok, focusing on identifying enablers, barriers, and concerns for MaaS adoption while quantifying evaluation criteria to determine the most suitable MaaS model. A mixed-methods approach was employed, beginning with a literature review to identify initial enablers and barriers, which were refined through expert meetings. Semi-structured interviews with 14 experts provided deeper insights into Bangkok’s transport context and potential MaaS models, while an AHP survey involving 12 experts quantified and prioritized the evaluation criteria. The findings highlight the roles and responsibilities of MaaS application …

การวิเคราะห์หาเวลาหยุดที่เหมาะสมของหุ้นกู้แปลงสภาพได้ในโครงสร้างพื้นฐานร่วมลงทุนระหว่างรัฐและเอกชน โดยใช้คอปูลา, สหัสวรรษ พาคำ

Chulalongkorn University Theses and Dissertations (Chula ETD)

ในอนาคตประเทศไทยจะมีโครงการร่วมลงทุนระหว่างรัฐและเอกชน (Public Private Partnership หรือ PPP) เกิดขึ้นในต่างจังหวัดเพิ่มมากขึ้น ทำให้นำมาซึ่งความเสี่ยงหลายด้าน เช่น ความเสี่ยงด้านจำนวนผู้ใช้บริการ ความเสี่ยงด้านรายได้จากการจัดเก็บค่าธรรมเนียม และความเสี่ยงด้านเงินกู้ เป็นต้น ส่งผลให้ภาคเอกชนขาดความมั่นใจเข้าร่วมลงทุนในโครงการ PPP ในต่างจังหวัด เพื่อแก้ปัญหาดังกล่าวภาครัฐต้องให้การสนับสนุนทางการเงินในโครงการ PPP ดังนั้น งานวิจัยนี้จึงมีจุดประสงค์เพื่อศึกษาการใช้เงินทุนชั้นลอยด้วยการใช้หุ้นกู้แปลงสภาพ (Convertible debenture) เป็นหุ้นกู้ที่ให้สิทธิหน่วยงานรัฐเป็นผู้ถือหุ้นในโครงสร้างเงินทุน ซึ่งเป็นรูปแบบการสนับสนุนทางการเงินใหม่ในโครงการ PPP และศึกษาสัดส่วนโครงสร้างเงินทุนที่เหมาะสม โดยเสนอการพัฒนาตัวแบบทางคณิตศาสตร์เพื่อวิเคราะห์หาเวลาหยุดที่เหมาะสมสำหรับการแปลงหนี้ให้เป็นทุน ทั้งการวิเคราะห์แบบ Deterministic และ Stochastic ภายใต้สถานการณ์ความไม่แน่นอนของตัวแปรเสี่ยงหลายตัว โดยใช้คอปูลา (Copula) วิเคราะห์ตัวแปรเสี่ยงที่มีความสัมพันธ์กัน ซึ่งจะช่วยเป็นการกำหนดตัวแปรสำคัญในตัวแบบทางคณิตศาสตร์ และนำตัวแบบทางคณิตศาสตร์ไปประยุกต์ใช้กับโครงการตัวอย่างจริง คือ โครงการทางพิเศษสายเมืองใหม่-เกาะแก้ว-กะทู้ จังหวัดภูเก็ต โดยเสนอเป็นทางเลือกให้กับหน่วยงานรัฐนำหุ้นกู้แปลงสภาพไปประยุกต์ใช้กับโครงการ PPP เพื่อวิเคราะห์เปรียบเทียบรูปแบบการสนับสนุนและโครงสร้างเงินทุนที่เหมาะสมสามกรณี ผลลัพธ์ที่ได้ คือ กรณีที่สามหน่วยงานรัฐให้การสนับสนุนเงินทุนชั้นลอยด้วยรูปแบบหุ้นกู้แปลงสภาพและให้เงินสนับสนุนทางตรงในโครงการ PPP ทำให้มีความคุ้มค่าทางการเงินของโครงการสูงสุด และสามารถวิเคราะห์หาเวลาหยุดที่เหมาะสมที่เกิดขึ้นในระยะเวลาดำเนินการของระยะสัมปทานโครงการได้

Performance Of Smart Shear Keys In Concrete Bridges Under Tsunami Loading: An Experimental Study, Haibin Zhang, Xinzhe Yuan, Genda Chen, Pedro Lomonaco

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Bridges have recently been exposed to an increasing number of natural hazards such as earthquakes and tsunamis. These extreme events have resulted in transverse offsets, overturning moments, and even dropping-off of superstructures due to their weak connection to substructures. These outcomes are potentially prevented or mitigated by developing and deploying sliding, modular, adaptive, replaceable, and two-dimensional (SMART) shear keys as fuse elements between superstructures and substructures. The novelty of SMART shear keys is to enable an adaptive control of both the force and displacement of bridges under different types of loads. In this study, the performance of SMART shear keys …

Predicting High-Impact Research In The Construction Engineering And Management Domain Using Computational Machine Learning, Islam H. El-Adaway, Gasser G. Ali, Muaz O. Ahmed, Radwa Eissa, Mohamad Abdul Nabi, Tamima Elbashbishy, Ramy Khalef

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Construction engineering and management (CEM) domain covers multiple evolving sub-disciplines and directions. To understand those directions, numerous research efforts have conducted scientometric analysis of publications to explore their significance and impact. Despite their valuable insights, such research endeavors have been limited to exploratory analyses, whereas no previous attempt has been conducted to predict the future impact of research in CEM. This study fills this knowledge gap by performing a predictive analysis of citation metrics of publications in CEM using machine learning (ML). The developed model was trained on a dataset of 93,868 publications using an XGBoost algorithm. Testing showed that …

Climate Change Adaptation For Embankment Through Biogeotechnics, Debayan Ghosh

Electronic Theses and Dissertations

Problematic soil like expansive soil, and frost-susceptible soil causes significant damage to civil infrastructure. The use of calcium-based stabilizers in the treatment of sulfate-rich expansive soils is not suggested due to the formation of ettringite. Infrastructure such as pavements and embankments built on expansive soil are often exposed to the damaging impacts of freeze-thaw cycles in areas prone to seasonal freezing making them vulnerable to cracking and spalling. In this study, a native expansive soil from South Dakota with a sulfate content of more than 10,000 ppm was stabilized using biopolymer and cement. The experimental study investigated the strength and …

Environmental Friendly Applications Of Ground Tire Rubber (Gtr) In Producing Concrete, Zahid Hossain, Ashraf Elsayed, Abu Sayed Mohammad Akid

Publications

Millions of waste automobile tires are generated yearly, an ever-growing issue for solid waste management authorities in Arkansas. Using waste tires as fuel generates toxic gases or dumping them in landfills is not sustainable. Hence, it is crucial to minimize the issues of managing and disposing of waste tires and incorporate them into concrete as construction material. This study aimed to investigate the fresh, mechanical, and durability properties of concrete incorporating waste ground tire rubber (GTR) as a replacement for sand and micronized rubber powder (MRP) as a replacement for cement. A total of eight concrete mixtures were prepared using …

Design Of 3d Printable Eco-Concrete By Utilizing Rheology Modifiers For Sustainable Infrastructure, Maryam Hojati, Muhammad Saeed Zafar

Data

In recent years, 3D printing technology has gained significant momentum across various industries within the construction sector, 3D printing has emerged as a promising technique; however, there are challenges associated with designing suitable construction materials and adjusting their properties for the 3D printing process. One of the key considerations in this regard is the rheological properties, encompassing parameters such as viscosity, yield stress, and thixotropy. These properties play a pivotal role in shaping the characteristics of 3D-printed concrete, both in its fresh and hardened states, including buildability, extrudability, and mechanical performance. Researchers have traditionally relied on chemical admixtures, such as …