Physical And Stochiometric Controls On Nutrient Uptake And Ecosystem Respiration In Contrasting Sites, 2024 University of New Mexico
Physical And Stochiometric Controls On Nutrient Uptake And Ecosystem Respiration In Contrasting Sites, Jancoba K. Dorley
Civil Engineering ETDs
Meteorological, hydrological, and biogeochemical processes naturally control stream ecosystems. These processes define the frequency and distribution of precipitation and the supply and demand of solutes and particles to support aquatic food chains through space and time. Studies have also found that stream ecosystems are also controlled by anthropogenic activities, which occur on a much shorter timescale. These anthropogenic activities affect stream ecosystems' structure and function from local to planetary changes to the environment. It is essential for scientists and engineers to understand the relationships between naturally occurring processes and those created by human activities for a better interpretation of stream …
Assessment Of Walls With Phase Change Materials Through Synergistic And Performance Measures Using Experimental And Simulated Test Houses, 2024 Olivet Nazarene University
Assessment Of Walls With Phase Change Materials Through Synergistic And Performance Measures Using Experimental And Simulated Test Houses, Cory J. Enfield
ELAIA
Current research on living and working spaces continues to strive to identify the most energy-efficient methods for heating and cooling, and many novel technologies have emerged from the research. One of the most promising, and the topic of this quantitative analysis, is the retrofitting of phase change materials (PCMs) into the walls of structures. Research has shown positive results, such as a reduced transfer of heat through walls, when PCMs are retrofitted into wall construction. The present research takes previously gathered data from test houses, built with typical North American framing, and simulates an additional fourteen test houses from the …
Developing And Forecasting The Egyptian Construction Cost Index, 2024 American University in Cairo
Developing And Forecasting The Egyptian Construction Cost Index, Mayada Elsaied
Theses and Dissertations
Accurate cost estimation is pivotal for the success of construction projects, yet the industry grapples with challenges related to cost overruns. Uncertainties and unforeseen variables often introduce discrepancies, particularly during the planning phase. Economic changes, considered uncontrollable risks, significantly influence these fluctuations. Various research endeavors have quantified the impact of economic conditions on construction costs, emphasizing the correlation between economic indicators and project expenses. Addressing these challenges, the Construction Cost Index (CCI), a tool introduced by Engineering News Record (ENR), accurately delineates the correlation between economic changes and construction costs. Despite its global efficacy, an Egyptian Construction Cost Index is …
Buckling Behavior Of Thin Wall Stiffened Cylindrical Shells Through Ml Techniques, 2024 University of North Dakota
Buckling Behavior Of Thin Wall Stiffened Cylindrical Shells Through Ml Techniques, Fnu Tabish, Muhammad Hamza Karim, Rajesh Godasu, Iraj H.P Mamaghani
SDSU Data Science Symposium
Stiffened cylindrical shell buckling strength mainly depends on the geometric and stiffness properties. A detailed parametric study was conducted to investigate the influence of these properties on the stiffened aluminium cylindrical shell buckling strength. The proposed framework involves an integration of finite element method and various machine learning techniques. The dataset obtained from the eigenvalue buckling analysis of 350 numerical simulations using ANSYS workbench 2022; however, the FE simulation of ten ring-stiffened cylindrical specimens was initially substantiated by experimental work conducted in the literature. 350 sample specimens were categorized into seven groups based on the no. of stiffeners varying from …
Containerization Of Seafarers In The International Shipping Industry: Contemporary Seamanship, Maritime Social Infrastructures, And Mobility Politics Of Global Logistics, 2024 The Graduate Center, City University of New York
Containerization Of Seafarers In The International Shipping Industry: Contemporary Seamanship, Maritime Social Infrastructures, And Mobility Politics Of Global Logistics, Liang Wu
Dissertations, Theses, and Capstone Projects
This dissertation discusses the mobility politics of container shipping and argues that technological development, political-economic order, and social infrastructure co-produce one another. Containerization, the use of standardized containers to carry cargo across modes of transportation that is said to have revolutionized and globalized international trade since the late 1950s, has served to expand and extend the power of international coalitions of states and corporations to control the movements of commodities (shipments) and labor (seafarers). The advent and development of containerization was driven by a sociotechnical imaginary and international social contract of seamless shipping and cargo flows. In practice, this liberal, …
Quaternary Ammonia Compounds In Disinfectant Products: Evaluating The Potential For Promoting Antibiotic Resistance And Disrupting Wastewater Treatment Plant Performance, 2024 Marquette University
Quaternary Ammonia Compounds In Disinfectant Products: Evaluating The Potential For Promoting Antibiotic Resistance And Disrupting Wastewater Treatment Plant Performance, Zihao Lu, Anna K. Mahony, William A. Arnold, Christopher Marshall, Patrick J. Mcnamara
Civil and Environmental Engineering Faculty Research and Publications
Quaternary ammonium compounds (QACs) are a class of compounds that were widely used as disinfectants during the COVID-19 pandemic and continue to be used as disinfecting agents. After consumer usage, QAC concentrations are diluted in wastewater as they enter wastewater treatment plants. At sub-inhibitory concentrations, QACs may have unintended repercussions, including increased antibiotic resistance and inhibition of process performance in wastewater treatment plants. This review first summarizes how QACs inhibit bacteria and then highlights the mechanisms by which QACs can promote antibiotic resistance in general. Reported environmental concentrations of QACs are compared to concentrations that are suspected to impact antibiotic …
Of Towers And Philosophy: How Interdisciplinarity Nurtures And Expands Capacity, 2024 Liberty University
Of Towers And Philosophy: How Interdisciplinarity Nurtures And Expands Capacity, Mario Calabretta
NEXUS: The Liberty Journal of Interdisciplinary Studies
No abstract provided.
Laboratory Evaluation Of Warm Mix Additives At Lower Than Traditional Compaction Temperatures, 2024 Rowan University
Laboratory Evaluation Of Warm Mix Additives At Lower Than Traditional Compaction Temperatures, Abdelrahman Mahmoud Waheish Ali
Theses and Dissertations
The study aims to evaluate the impact of warm mix additives (WMA) on the rheological and performance properties of asphalt binders and mixtures. For this purpose, PG 76-28 and PG 58-28 were obtained with one organic (Sasobit Redux) and three chemical WMA (Rediset, Evotherm, and Zycotherm). All WMA-modified asphalt binders were aged at three different aging levels. Laboratory tests such as performance grade (PG), critical temperature differential (ΔTc), asphalt binder cracking device (ABCD), linear amplitude sweep test (LAS), and Fourier transform infrared spectroscopy (FTIR) were performed. In addition to the binder testing plan, this study also evaluated the impact of …
Assessment Framework For Bim-Digital Twin Readiness In The Construction Industry, 2024 Department Architecture and Building Sciences, College of Architecture & Planning, King Saud University, Riyadh 11574, Saudi Arabia
Assessment Framework For Bim-Digital Twin Readiness In The Construction Industry, Aljawharah A. Alnaser, Ali Hassan Ali, Haytham H. Elmousalami, Ahmed Elyamany, Ahmed Gouda Mohamed
Civil Engineering
No abstract provided.
Modeling Of Equilibrium Shoreline Of Headland Bay Beaches, 2024 Irrigation and Hydraulics Engineering Department, Civil Engineering Department, Faculty of Engineering, Tanta University, Egypt
Modeling Of Equilibrium Shoreline Of Headland Bay Beaches, Mohamed Ahmed Elmarakby, Ahmed Elshinnawy, Bakenaz A. Zeidan
Journal of Engineering Research
Engineering tools for predicting a long-term reaction of beaches include equilibrium beach formulations. They are used to assess how human interference (protection works, breakwaters, ports etc.) has affected the shoreline reaction since they Specify the final orientation of a beach on a time scale of years. One of the equations for determining the Static Equilibrium Planform (SEP) of Headland Bay Beaches (HBBs) that can be found in the literature is the Parabolic Bay Shape Equation (PBSE). The placement of the down-coast control point (Po), which is the down drift limit from which the PBSE is applied, has a …
Ground Settlements Due To Quad Water Tunnel Construction, 2024 Prof. of Geotechnical Engineering, Faculty of Engineering, Tanta University, Egypt
Ground Settlements Due To Quad Water Tunnel Construction, Marawan M. Shahien M. Shahein, Ehab Ahmed Khalil E.Khalil, Ahmed F. Abd El Kader A. Abd El Kader, Mahmoud Abdulnasser Hodeab M.A.Nasser
Journal of Engineering Research
Construction of a tunnel under an existing one poses significant geotechnical challenges due to the potential surface and subsurface settlements caused by the new tunnel construction and its impact on the existing tunnel, adjacent buildings, and facilities. The complexity intensifies when multiple adjacent tunnels need to be constructed, such as twin, triplet, quad, or more, as the construction of each tunnel affects the others. This interaction depends on various factors, including the horizontal distance between each tunnel (pillar width), the tunnel's depth and vertical position relative to the existing tunnel (pillar depth), and their influence on surface and subsurface settlement …
Exemplary Studies On The Torsional Response Of Single Pile In Contaminated Sand, 2024 Faculty of Engineering, Tanta University, Egypt
Exemplary Studies On The Torsional Response Of Single Pile In Contaminated Sand, Ahmed Nasr, Waseim Azzam, Nada Ramadan
Journal of Engineering Research
Deep foundations, including piles, are employed in types of coastal soil because the soil in such regions may be subjected to several variables that alter the engineering features of the soil, like oil contamination. Together with the loads caused by supported superstructures, the pile foundations may also be susceptible to torsional loads from eccentric, horizontal loads brought on by winds, earthquakes, ship accidents, and waves. Tests have been conducted in this laboratory investigation to examine the behavior of piles under torsional load (T) in polluted sandy soil. Also, tests investigated how the Lp/Dp ratio affected the piles' bearing capacity. Details …
Enhancing Bridge Resilience And Overheight Vehicle Mitigation Through Innovative Sacrificial Cushion Systems, Aly Mousaad Aly, Marc Hoffmann
Faculty Publications
Transportation departments have made significant strides in addressing the challenges posed by the increasing weights of trucks on bridges. While there is a growing awareness of overheight vehicle collisions with bridges, implementing effective countermeasures remains limited. The susceptibility of bridges to damage from such collisions is on the rise, further exacerbated by unpredictable lateral impact forces. This study employs nonlinear impact analysis to assess the response of an unprotected vehicle-girder model, yielding realistic deformation outcomes comparable to observed impacts on the US-61 bridge. Predictions for a truck traveling at 112.65 km/h indicate deformations of 0.229 m, 0.161 m, and 0.271 …
Sustainable Infrastructure Development In The Ikn Region (Nusantara Capital): Simulation Of The Smart Self-Sustaining Urban Center Area Development, 2024 Universitas Indonesia
Sustainable Infrastructure Development In The Ikn Region (Nusantara Capital): Simulation Of The Smart Self-Sustaining Urban Center Area Development, Naufal Budi Laksono, Yusuf Latief
Smart City
Embarking on the quest for a sustainable urban future, this research immerses itself in the vibrant landscape of "Sustainable Infrastructure Development in the IKN Region (Nusantara Capital)." This study investigates the financial viability and economic attractiveness of the Five City project, focusing on efficient infrastructure management for sustainable settlement development. The core facility comprises four vertical residential towers with supporting amenities. The research aims to evaluate the project''s feasibility over a 25-year investment period through comprehensive financial analyses.The research employs a structured approach, encompassing regulatory analysis, stakeholder identification, financial capability analysis, and risk management. Parameters such as Net Present Value …
The Interpretative Structural Modeling For Stakeholder Involvement To Reduce Slum Settlements, 2024 Universitas Indonesia, Faculty of Engineering, Civil Engineering Department
The Interpretative Structural Modeling For Stakeholder Involvement To Reduce Slum Settlements, Bich Hanes Bich, Ayomi Dita Rarasati
Smart City
The array of problems originating from slum settlements not only results in unwholesome environment, unlawful land utilization, and various internal challenges within the vicinity but also impacts the surrounding regions and the overall urban infrastructure network. In pursuit of Indonesia's 2045 Vision, which emphasizes on "equitable and integrated infrastructure development", the zero slums constitutes a pivotal component of the Ministry of Public Works and Public Housing's overarching vision. Nonetheless, a disparity has been identified in addressing slum settlements in West Kalimantan, hindering the achievement of this objective. This research aims to identify the stakeholders and the priority factors in determining …
Project Stakeholder Analysis In Temadore Bridge Construction Development, 2024 Universitas Indonesia, Faculty of Engineering, Civil Engineering Department
Project Stakeholder Analysis In Temadore Bridge Construction Development, Hud Rafsanjani, Ayomi Dita Rarasati
Smart City
The construction of bridge is important due to its ability to link communities through land-road connection, thereby saving time and increasing productivity of those living in these areas. Therefore, this research evaluated the Temadore bridge, built to link Ternate City, Maitara land and Tidore City by road to enhance movement and reduce disparities in assessing both areas. Data were collected using the Interpretative Structural Modeling (ISM) which searched for and identified several variables according to the dependence power and driving power. The result showed that construction of bridge increased the movement of community activities and productivity, thereby leading to growth.
Building Services Engineering January/February 2024, 2024 Technological University Dublin
Building Services Engineering January/February 2024
Building Services Engineering
No abstract provided.
Statistical Analysis For Water Quality Data Using Anova (Case Study- Lake Burullus Influent Drains), 2024 The British University in Egypt
Statistical Analysis For Water Quality Data Using Anova (Case Study- Lake Burullus Influent Drains), Mohamed Hussein Hegazy
Civil Engineering
Lake Burullus is considered one of the most valuable northern lakes in Egypt due to its unique ecological system and special location. Over the past four decades, the lake has suffered from high contamination levels due to expansion in fish farming and increasing of agricultural drainage water entering the southern side of the lake through eight influent drains. This research aims to assess the current situation of the lake’s influent drains. For this purpose, two types of statistical analysis, Mean average method, and Analysis of Variance (ANOVA) were used. The water quality conditions for six major drains (Therah (Tira), Nashart, …
A Structure From Motion Photogrammetric Method For Continuously Measuring And Tracking The Deformations Of Soils During Triaxial Testing, 2024 Missouri University of Science and Technology
A Structure From Motion Photogrammetric Method For Continuously Measuring And Tracking The Deformations Of Soils During Triaxial Testing, Xiaolong Xia
Doctoral Dissertations
"Measuring soil deformation characteristics during triaxial testing is an important part of characterizing the stress-strain behavior of both saturated and unsaturated soils. The total and local deformations and volume changes of a soil specimen are indispensable parameters that need to be measured and are of great significance for understanding volume change and shear strength characteristics of the soil. Over the past several decades, numerous efforts have been made to measure the soil deformations during triaxial testing. However, it remains a great challenge for researchers to measure the volume-changes of unsaturated soils due to the existence of the air phase.
This …
Low-Shrinkage Fiber-Reinforced Concrete For Infrastructure Construction And Rehabilitation, 2024 Missouri University of Science and Technology
Low-Shrinkage Fiber-Reinforced Concrete For Infrastructure Construction And Rehabilitation, Jingjie Wei
Doctoral Dissertations
"The aim of this study is to develop two classes of low-shrinkage high-performance concrete (HPC): fiber-reinforced super workable concrete (FR-SWC) for infrastructure construction and fiber-reinforced self-consolidating concrete (FR-SCC) for repair applications. HPC with excess content of shrinkage mitigation materials (SMMs), including shrinkage-reducing admixture (SRA), superabsorbent polymer (SAP), and expansive agent (EA) has a detrimental effect on mechanical performance. These classes of HPC were optimized to reduce shrinkage, enhance mechanical properties, and improve durability. The effect of fiber type (macro synthetic fiber, MSF; 5D steel fiber, 5D; 80% 3D + 20% short steel fibers; STST), SMMs, and plastic viscosity on bond …