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Articles 1 - 30 of 705
Full-Text Articles in Engineering
Enhancing Concrete Sustainability With Self-Healing Technologies, Al Shimaa Abdullatif
Enhancing Concrete Sustainability With Self-Healing Technologies, Al Shimaa Abdullatif
Theses and Dissertations
Thanks to its strength, durability and affordability, Portland cement concrete is the most commonly used building material worldwide. However, concrete cracking is inevitable due to numerous factors including shrinkage, exposure to external chemicals, internals reactions, excessive loads, to name but a few. Self-healing is a promising technique that can enable concrete to autogenously heal cracks and alleviate much of the damage. Such healing can without a doubt extend the service life with less need for external repair works therefore it contributes to sustainability. Over the years, several means of self-healing agents have been explored including bio-based procedures and the incorporation …
Novel Insights On The Setting Process, Hardened Properties, And Durability Of Sustainable Ultra-High-Performance Seawater Sea Sand Concrete, Wei Zhang, Dawei Ding, Jianxing Sun, Feng Guo, Haibao Feng, Hongyan Ma, Shuxian Hong, Biqin Dong, Dongshuai Hou
Novel Insights On The Setting Process, Hardened Properties, And Durability Of Sustainable Ultra-High-Performance Seawater Sea Sand Concrete, Wei Zhang, Dawei Ding, Jianxing Sun, Feng Guo, Haibao Feng, Hongyan Ma, Shuxian Hong, Biqin Dong, Dongshuai Hou
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Using seawater and sea sand to prepare concrete could effectively alleviate the shortage of freshwater and river sand resources and promote the sustainable development of concrete. However, the current research on the setting process, hardened properties, and sustainability of ultra-high-performance seawater sea sand concrete (UHPSSC) remain considerably limited. In this paper, the UHPSSC was designed to mitigate the autogenous shrinkage and enhance the sustainability, and the effect of seawater, untreated and desalinated sea sand on the setting process, mechanical properties, durability, and sustainability was explored by various tests. Results show that the abundant ions (e.g., Cl- and SO42-) in seawater …
Cryogenic Fuel Applications To Sustainable Commercial Aircraft, Jack R. Kisling, Lillian Panning
Cryogenic Fuel Applications To Sustainable Commercial Aircraft, Jack R. Kisling, Lillian Panning
College of Engineering Summer Undergraduate Research Program
Finding a source of clean and renewable energy is one of the greatest challenges humanity will face in the 21st century. With populations expanding, developing countries increasing their use of resources, and the rapid and alarming effects of climate change, a shift to a sustainable future is an existential prospect.
The goal of our project is to take the first steps toward getting safety procedures and lab space established, so mechanical engineering senior projects can quickly begin to experiment with cryogenic fuels. They will explore the application of cryogenic fuels to commercial aviation.
A Marine Knowledge System For Ocean Affairs: Integrating Data, Evaluating Usage, And Enabling Sustainable Marine Management, Yu-Jen Pan
Journal of Marine Science and Technology
This study presents the evolution and assessment of the Marine Knowledge Education System (MKES), designed to improve user acceptance among students in professional marine science courses in Taiwan. The MKES leverages real-world maritime cases from the General Coast Guard Administration and is built upon existing technologies like cloud services, social networks, and data analysis tools. The technology acceptance model (TAM) provides the theoretical underpinning for the assessment of user confidence. Data was collected from 190 participants through purposive sampling. Path analysis confirmed all hypothesized relationships within the TAM with statistical significance (p < 0.001). Additionally, paired-sample t-tests revealed a significant increase in student acceptance of the MKES after integrating it into the marine science curriculum. These findings underscore the capacity of the MKES as a digital learning tool to enrich course pedagogy and improve student learning outcomes, thereby offering valuable support in advancing the education of professional marine managers.
Building Services Engineering September/October 2024
Building Services Engineering September/October 2024
Building Services Engineering
No abstract provided.
A P-Graph Approach For Planning Sustainable Rice Straw Management Networks, Victoria Migo Sumagang Maria, Michael Angelo B. Promentilla
A P-Graph Approach For Planning Sustainable Rice Straw Management Networks, Victoria Migo Sumagang Maria, Michael Angelo B. Promentilla
The Philippine Agricultural Scientist
The Philippines produces up to 15.2 Mt of rice straw waste annually. Unmanaged rice straw waste disposal can lead to pollution from open field burning. On the other hand, rice straw agricultural waste can be used sustainably to produce valuable products such as mushrooms, fodder, pellets, or bioenergy, in a rice straw management system. Such systems can be optimized using Process Integration tools so that the raw materials are used efficiently at the maximum profit and with a minimal carbon footprint. The P-graph framework is an efficient Process Integration tool that solves Process Network Synthesis problems. A P-graph finds the …
Impact Of Nitrogen Species On Algal Carbon Capture, Lauren J. Todd
Impact Of Nitrogen Species On Algal Carbon Capture, Lauren J. Todd
All Theses
Increasing global carbon emissions from fossil fuel combustion and the resulting detrimental effects of climate change have created a need for atmospheric carbon drawdown. Biological-based carbon capture not only sequesters carbon dioxide (CO2) but also provides a sustainable source of biomass for biofuels and biomaterials. Thus, the aim of this research was to examine freshwater green algal growth with total ammoniacal nitrogen (TAN) and nitrate nitrogen (NO3-N) sources at high pH for improving carbon capture potential. The following objectives were accomplished: nitrogen uptake was identified as simultaneous or sequential, the effect of TAN and NO3 …
Feasibility Study For The Application Of A Solar Powered Absorption Chilling System For Cooling Poultry Houses In Northwest Arkansas, Matthew James Kelly
Feasibility Study For The Application Of A Solar Powered Absorption Chilling System For Cooling Poultry Houses In Northwest Arkansas, Matthew James Kelly
Graduate Theses and Dissertations
This paper investigates the economic feasibility of utilizing a solar-powered absorption chiller to provide cooling for poultry houses in northwest Arkansas. An existing thermodynamic model of a poultry house was modified to account for cooling. A simulation was performed using actual weather data from Fayetteville, Arkansas for 26 flocks of broilers at four cooling capacities for the 2020, 2021, and 2022 calendar years. Based on the simulation, the savings from reduced electricity use for ventilation and the cost of the required absorption chiller and solar thermal array for an 8-house farm were calculated. While providing cooling was found to reduce …
Light Structure Building Technology Towards Sustainable Environmental Design, Sally El-Sayed Prof. Dr. Mai Wahba Madkour2, Prof. Dr. Marwa Ahmed Kamer El-Dawla3
Light Structure Building Technology Towards Sustainable Environmental Design, Sally El-Sayed Prof. Dr. Mai Wahba Madkour2, Prof. Dr. Marwa Ahmed Kamer El-Dawla3
Journal of Engineering Research
The building and construction industry is one of the most important sectors globally , as it plays a vital role in providing housing and infrastructure that meets the needs of various communities , However , this industry is considered one of the largest contributors of negative environmental impacts in terms of consuming huge amounts of natural resources in an unsustainable manner and a subsequent increase in energy consumption .Therefore, it was necessary to find solutions and explore for new and sustainable construction methods to alleviate these problems .This research paper will focus on the use of light buildings and their …
Using Recycled Materials Towards Sustainable, Eco-Friendly Building In Hot Regions – A Review, Mai W. Madkour Hosny A. Dewer, And Shaimaa M. Refaat
Using Recycled Materials Towards Sustainable, Eco-Friendly Building In Hot Regions – A Review, Mai W. Madkour Hosny A. Dewer, And Shaimaa M. Refaat
Journal of Engineering Research
Due to population growth and increased urban activity, there is a rise in waste production, which poses health and environmental risks. Additionally, the extraction and transportation of natural resources to places of employment require significant energy consumption, and the world has therefore moved to seek new alternatives away from traditional construction methods by recycling building materials such as concrete, brick, glass, wood, etc., or using new building materials such as rice straw, plastics, corks, etc., taking into account architectural design. The research is aimed at demonstrating that recycled materials have the potential to perform a better environmental performance by preserving …
Enhancing Water Sustainability In North Africa: Literature Review And Synthesis Of Current Knowledge Gaps In Sudan, Osman M. A. Adam, Aaron R. Mittelstet, Derek M. Heeren, Troy E. Gilmore
Enhancing Water Sustainability In North Africa: Literature Review And Synthesis Of Current Knowledge Gaps In Sudan, Osman M. A. Adam, Aaron R. Mittelstet, Derek M. Heeren, Troy E. Gilmore
Department of Biological Systems Engineering: Conference Presentations and White Papers
This study delves into the critical role of groundwater in addressing global water challenges, with a focus on the Nubian Sandstone Aquifer System (NSAS) in North Africa. Groundwater constitutes a source of potable water, irrigation, and industrial use, especially in arid regions where surface water is limited. We analyzed the status of water quantity, withdrawals, recharge, and geological characteristics in the NSAS, specifically in Sudan, Egypt, Libya, and Chad. Though the NSAS is largely an untapped resource, we evaluated various scenarios to determine the quantity of cropland that can be sustainably irrigated. The NSAS is located in an arid region, …
Refinement Of A Regional Storm Surge Mesh For High-Resolution Topographic Representation Of Volusia County, Morgan Harbin
Refinement Of A Regional Storm Surge Mesh For High-Resolution Topographic Representation Of Volusia County, Morgan Harbin
Doctoral Dissertations and Master's Theses
In 2022, Volusia and Flagler Counties of northeast central Florida were impacted indirectly by consecutive Hurricanes Ian and Nicole; the destabilization of dunes and armoring infrastructure caused by Ian left the region susceptible to Hurricane Nicole, which caused unprecedented coastal damage to dunes and seawalls. The extent of damage that occurred within Volusia and Flagler Counties during the 2022 hurricane season, the underrepresentation of this region within sustainability and resilience research, and the ecological, social, and economic value of the geography provide just cause for scientific inquiry of the area’s coastal dynamics. This thesis specifically describes an investigation of Hurricane …
Building Sevices Engineering July/August 2024
Building Sevices Engineering July/August 2024
Building Services Engineering
No abstract provided.
A Strategic Framework For Attaining Golden Leed Certification For Resorts, Mohamad Soliman, Hadi Jawad, Mariam Younes, Oussama El Hamaoui, Saadeddine Ramadan
A Strategic Framework For Attaining Golden Leed Certification For Resorts, Mohamad Soliman, Hadi Jawad, Mariam Younes, Oussama El Hamaoui, Saadeddine Ramadan
BAU Journal - Science and Technology
The contemporary landscape of engineering is witnessing a pivotal shift towards sustainability, encapsulated in the catchphrase "GO GREEN". This global trend underscores a strategic emphasis on sustainable design, where engineering projects prioritize a delicate balance among environmental, societal, and economic considerations.” However, a persistent challenge in construction projects lies in their tendency to neglect environmental impact, contributing to increased contamination levels. This paper aims to introduce the "Lodge in the Green" project, meticulously aligned with LEED Certification principles. LEED, or Leadership in Energy and Environmental Design, stands as the foremost green building rating system, highlighting its relevance in contemporary sustainable …
An Experimental Study On The Effect Of Salt And Sugar Combination On Mortar Properties, Lelian Elkhatib, Jamal Khatib, Abbas Hassan, Mohammad Kassem, Adel Elkordi
An Experimental Study On The Effect Of Salt And Sugar Combination On Mortar Properties, Lelian Elkhatib, Jamal Khatib, Abbas Hassan, Mohammad Kassem, Adel Elkordi
BAU Journal - Science and Technology
The most important engineering material nowadays, used in construction is concrete. Concrete consists mainly of sand, cement and aggregates. However, weather conditions play a crucial role in affecting concrete characteristics and its serviceability. Weather conditions could be the reason to delay or accelerate the setting time of the concrete. As a result, and in order to deal with weather conditions and its effect on the setting time of concrete, accelerators and retarders must be added to the concrete mix. This research paper focuses on the impact of the use of salt and sugar on the setting time of concrete. Accelerators, …
A Case Study: Impacts Of A Building Retrofit On Employee Efficiency And Productivity, Rigo Zepeda
A Case Study: Impacts Of A Building Retrofit On Employee Efficiency And Productivity, Rigo Zepeda
Construction Management
This case study explores the effects of retrofitting building systems on operational efficiency and employee productivity in the contemporary office environment. As concerns over sustainability and the well-being of employees are now at the forefront of modern workplace design, the retrofitting of outmoded building systems has been seen as an option to enhance energy efficiency and occupant satisfaction. This research paper focuses on the recently retrofitted Performance Contracting office building in Benicia, California. As heating and ventilation systems, and lighting are two big contributors to energy consumption in buildings and comfort, analyzing these systems provided insight into its building performance. …
The Future Of Fiberglass Rebar In Concrete Structures, Dillon Michael Elliott
The Future Of Fiberglass Rebar In Concrete Structures, Dillon Michael Elliott
Construction Management
In the working elements of the construction industry, the strive for materials that aim for strength, durability, and sustainability are never-ending. For traditional steel reinforcement this material faces inevitable challenges over time such as corrosion, weight of material, and environmental concerns. However with the emergence of fiberglass rebar, the negative impacts we see from traditional steel rebar may be resolved within the industry of construction. This paper aims to explore and propose a different alternative to reinforcement in concrete structures with the use and integration of fiberglass. The effectiveness which fiberglass as a reinforcement material offers will be investigated throughout …
Exploring California Residents’ Perspectives On Solar Panel Viability For Residential Properties, Alecsander Gregg
Exploring California Residents’ Perspectives On Solar Panel Viability For Residential Properties, Alecsander Gregg
Construction Management
The qualitative research conducted in this study aims to analyze the overall consensus of feelings and attitudes from California residents towards photovoltaic systems being installed on to their properties. The intended audience for this study are for stakeholders in the renewable energy markets, and more specifically in California’s solar panel market. Additional audiences for this study may be for additional or other research regarding solar panel or photovoltaic technology specifically within the state of California. Through a Google Forms questionnaire distributed via email, participants provide insight on their thoughts and feelings regarding certain aspects of solar panels on properties that …
Skip The Grid: Solar Energy Concepts In Navajo Nation Schools, Dana M. Craighead
Skip The Grid: Solar Energy Concepts In Navajo Nation Schools, Dana M. Craighead
Construction Management
Skip the Grid is a non-profit initiative with a goal of providing solar power to homes with school-aged children in the Navajo Nation. California Polytechnic State University, San Luis Obispo (Cal Poly) partners with SOLV energy, and Heart of America (HOA) to provide approximately 30 homes each year with Goal Zero solar panels, and educate students in the surrounding areas about how solar energy can help power communities. This year, a group of 20 students from departments including Construction Management, Electrical Engineering, Environmental Management and Protection, Mechanical Engineering, and Graphic Communication joined the initiative and traveled to Shiprock, New Mexico …
Product Design For Repairability: Identifying Failure Modes With Topic Modeling And Designing For Electronic Waste Reuse, Claire J. Franz
Product Design For Repairability: Identifying Failure Modes With Topic Modeling And Designing For Electronic Waste Reuse, Claire J. Franz
Master's Theses
Design for repairability is imperative to making products that last long enough to justify the resources they consume and the pollution they generate. While design for repairability has been gaining steady momentum, especially with recent advances in Right to Repair legislation, there is still work to be done. There are gaps in both the tools available for repair-conscious designers and the products coming onto store shelves. This thesis work aims to help set sails in the right direction on both fronts.
This research explores the use of topic modeling (a natural language processing technique) to extract repairability design insights from …
Investigating The Performance Of Bendable Concrete Against Traditional Concrete, Landon J. Poston
Investigating The Performance Of Bendable Concrete Against Traditional Concrete, Landon J. Poston
Construction Management
The qualitative research in this case study evaluates the importance of bendable concrete within various construction settings. The data aims to justify the interest in bendable concrete, as well as why it is not being used more in structural work. The intended stakeholders of this paper are concrete suppliers, contractors, and researchers who are looking for more imperative ways to manufacture a more sustainable form of concrete. Through a brief online meeting and a Google Form questionnaire, company participants were able to provide the knowledge and feedback desired for how bendable concrete can be incorporated more in the future of …
Effect Of Pismo Clams As Partial Fine And Coarse Aggregate Replacement On Workability And Compressive Strength Of Concrete, Alan Munoz Pille
Effect Of Pismo Clams As Partial Fine And Coarse Aggregate Replacement On Workability And Compressive Strength Of Concrete, Alan Munoz Pille
Construction Management
Concrete has been utilized for ages. Unfortunately, over the hundreds of years there has been little development in the applications of new aggregate materials. The world is moving towards a sustainable way of living and as a result seashells have come into the mix. Pismo Clams are a native species to San Luis Obispo County. This marine species has the possibility of becoming a partial aggregate replacement for fine and coarse aggregates in concrete. The results of prior studies indicate a possible application of seashell use in concrete. This paper evaluates the workability and compressive strength of concrete containing fine …
Pet And Polyolefin Plastics Supply Chains In Michigan: Present And Future Systems Analysis Of Environmental And Socio-Economic Impacts, Utkarsh S. Chaudhari, Kamand Sedaghatnia, Barbara K. Reck, Kate Maguire, Anne T. Johnson, David Watkins, Robert M. Handler, Tasmin Hossain, Damon S. Hartley, Vicki S. Thompson, Alejandra Peralta, Jenny L. Apriesnig, David Shonnard
Pet And Polyolefin Plastics Supply Chains In Michigan: Present And Future Systems Analysis Of Environmental And Socio-Economic Impacts, Utkarsh S. Chaudhari, Kamand Sedaghatnia, Barbara K. Reck, Kate Maguire, Anne T. Johnson, David Watkins, Robert M. Handler, Tasmin Hossain, Damon S. Hartley, Vicki S. Thompson, Alejandra Peralta, Jenny L. Apriesnig, David Shonnard
Michigan Tech Publications, Part 2
Many actions are underway at global, national, and local levels to increase plastics circularity. However, studies evaluating the environmental and socio-economic impacts of such a transition are lacking at regional levels in the United States. In this work, the existing polyethylene terephthalate and polyolefin plastics supply chains in Michigan were compared to a potential future (‘NextCycle’) scenario that looks at increasing Michigan’s overall recycling rate to 45%. Material flow analysis data was combined with environmental and socio-economic metrics to evaluate the sustainability of these supply chains for the modeled scenarios. Overall, the NextCycle scenario for these supply chains achieved a …
The Use Of Repurposed Whole Textiles To Modify The Mechanical And Hydrogeological Properties Of Green Roof Media And Granular Soils, Angelis Almanzar-Chevalie, Yehya Elfgeeh, Calvin O. Walters Jr.
The Use Of Repurposed Whole Textiles To Modify The Mechanical And Hydrogeological Properties Of Green Roof Media And Granular Soils, Angelis Almanzar-Chevalie, Yehya Elfgeeh, Calvin O. Walters Jr.
Publications and Research
This study investigates using repurposed whole textiles to modify the mechanical and hydrogeological properties of lightweight Green Roof media and granular pavement soils.
Green Roof Media Green roofs aim to bring the advantages of suburban agriculture to urban environments while improving energy efficiency and enhancing stormwater management in public, commercial, and residential buildings. Previous studies by City Tech undergraduate research assistants demonstrated significant modification in hydrogeological properties when incorporating textile fabric up to 3% textile by weight (%Tex) at an aspect ratio of 1:1. The effects of mixing repurposed whole textile fiber with Green Roof media is evaluated with regards …
Navigating The Relationships Among Food Waste Practices, Environmental Intentions, And Sustainability Knowledge Of Students, Merri Claire Minshew
Navigating The Relationships Among Food Waste Practices, Environmental Intentions, And Sustainability Knowledge Of Students, Merri Claire Minshew
Honors College Theses
Colleges and university campuses are among the greatest food wasters in the US due to combined over production and plate waste from consumers. While some schools have developed programs aimed at reducing and sustainably managing food waste, much of it ends up in landfills and produces greenhouse gas emissions. The overall goal of the research was to collect a comprehensive data set on university students’ food waste practices and behavior, environmental and sustainability knowledge, and environmental intentions. For probing relationships among these drivers, a structural equation model and student survey was developed. The survey of 37 questions was collected on …
Comparison Of All-In Sustaining Costs, Gold Grade, And Gold Prices In North American Gold Mining Companies, David Abiodun
Comparison Of All-In Sustaining Costs, Gold Grade, And Gold Prices In North American Gold Mining Companies, David Abiodun
Graduate Theses & Non-Theses
Mining has evolved into an equilibrium of ore deposit management, environmental stewardship, and economic profitability that necessitates a proper understanding of economics and production efficiency. The All-In Sustaining Cost (AISC) was introduced in 2013 to better capture the cost of producing one ounce of gold and, when compared with the gold price and grade, could describe a company’s gold production efficiency. In this paper, this novel analysis focuses on US and Canadian operations under Barrick and Newmont, the two largest gold mining companies in North America, from 2019-2022. Published data for Coeur and Kinross were also secondarily analyzed. Under Newmont …
Ring Opening Of Hydrotreated Thermal Deoxygenation (Tdo) Oil Over Supported Metal Catalysts To Improve Engine Properties, Oluwaseun Salami
Ring Opening Of Hydrotreated Thermal Deoxygenation (Tdo) Oil Over Supported Metal Catalysts To Improve Engine Properties, Oluwaseun Salami
Electronic Theses and Dissertations
In order to meet CO2 emission standards, set by the climate accord in 2015, decarbonizing the transportation sector must become a priority globally. While electric vehicles are becoming more widely used, decarbonizing long distance transportation (e.g.., trucks, airplanes, marine vessels) is still a major concern, contributing over 50% of GHG emissions from transportation in 2018. To bridge this limitation of electric vehicles, biofuel is a viable alternative, having high energy density comparable to conventional fuels from crude oil. Renewable crude oil (biofuel) produced by Thermal DeOxygenation (TDO) is an interesting option as a cleaner intermediate to produce diesel …
Dynamics Of Link Importance Across Flood Disaster Phases And Flood Impacts On Operation Of An Industry, Navin Bhatta
Dynamics Of Link Importance Across Flood Disaster Phases And Flood Impacts On Operation Of An Industry, Navin Bhatta
All Theses
Transportation damage and disruptions will become increasingly common as the frequency of floods increases due to climate change. Given the size and cost of the transportation network construction, communities' mitigation measures should be supported by evaluations that cover both normal and disaster management phases. This thesis examines the criticality of road segments in the normal, flood response, and recovery phases, considering the effects on emergency services, healthcare, industry, education, recreation, and transit and analyses that whether a flood disrupts the operational trips of a company in Anderson County, South Carolina. A 100-year event and a 500-year flood event provides context …
Development Of A More Sustainable High And Ultra-High-Performance Concrete, Enrique Chirino Andalco
Development Of A More Sustainable High And Ultra-High-Performance Concrete, Enrique Chirino Andalco
Theses and Dissertations
The urgent need to address climate change and environmental damage presents humanity with significant challenges that must be tackled quickly, not acting promptly will result in irreversible consequences, such as extreme weather events, public health risks, and water shortages, among other impacts.
Due to its enormous size and variety of uses, the construction industry is a key factor in addressing the climate challenge. Specifically, concrete as the most used construction material in the world is a good target for developing innovative and Sustainable improvements to reduce environmental impacts.
Using by-products from other industries in concrete manufacturing is a common and …
Building Services Engineering May/June 2024
Building Services Engineering May/June 2024
Building Services Engineering
No abstract provided.