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28,869 full-text articles. Page 1 of 721.

Prevention Of Harmful Algal Blooms By The Mitigation Of Phosphorus Nutrient Loading Via Filtration By Steel Wool And Activated Carbon, Samantha Zidd, Sara Kidd, Ronald Simpson 2020 The University of Akron

Prevention Of Harmful Algal Blooms By The Mitigation Of Phosphorus Nutrient Loading Via Filtration By Steel Wool And Activated Carbon, Samantha Zidd, Sara Kidd, Ronald Simpson

Williams Honors College, Honors Research Projects

Harmful Algal Blooms (HABs) are a devastating ecological and economic consequence of the abundance of nutrient-rich agricultural runoff entering aquatic ecosystems (Baker et al. 2014). Bioavailable phosphorus from synthetic fertilizers is one of the major nutrients contributing to this global issue. Preliminary studies indicate that dissolved phosphorus can be removed from an aqueous environment when passed through a composite mixture of granular steel wool particles and activated carbon (Erickson, Gulliver, and Weiss (2007). Further research was conducted using higher quality concentration measurements to determine what grades of steel wool (0000, 000, 00) and types of activated carbon (GAC, PAC, EAC ...


Mandela Splash Pad Pre-Construction Plan, Levi Sandbulte 2019 University of Nebraska at Omaha

Mandela Splash Pad Pre-Construction Plan, Levi Sandbulte

Theses/Capstones/Creative Projects

In the construction industry, it is the responsibility of the general contractor to take the architect’s ideas and turn it into a real building. Many times this requires ample communication and several drafts. This efficient execution of this process is vital to the completion of a successful project. In this project, I practice this communication process. The challenge presented by the owner is to build an affordable splash pad, and without impacting the construction schedule of the Early Childhood Development Center (ECDC) that is being built on the same property at the same time. This proposal gives the owner ...


Variable Friction Cladding Connection For Seismic Mitigation, Yongqiang Gong, Liang Cao, Simon Laflamme, James Ricles, Spencer Quiel, Douglas Taylor 2019 Iowa State University

Variable Friction Cladding Connection For Seismic Mitigation, Yongqiang Gong, Liang Cao, Simon Laflamme, James Ricles, Spencer Quiel, Douglas Taylor

Civil, Construction and Environmental Engineering Publications

Cladding systems are conventionally designed to serve an architectural purpose and provide environmental protection for building occupants. Recent research has been conducted to enhance structural resiliency by leveraging cladding systems against man-made and natural hazards. The vast majority of the work includes the use of sacrificial cladding panels and energy dissipating connectors. These passive protection systems, though effective, have typically targeted a single hazard one-at-a-time because of their limited frequency bandwidths. A novel semi-active friction connection has been previously proposed by the authors to leverage the cladding motion for mitigating blast and wind hazards. This semi-active friction device, termed variable ...


A Review Of Pesticide Fate And Transport Simulation At Watershed Level Using Swat: Current Status And Research Concerns, Ruoyu Wang 2019 University of California, Davis

A Review Of Pesticide Fate And Transport Simulation At Watershed Level Using Swat: Current Status And Research Concerns, Ruoyu Wang

Ruoyu Wang

The application of pesticides in agriculture is a widely-used way to alleviate pest stresses. However, it also introduces various environmental concerns due to the offsite movement of pesticide residues towards receiving water bodies. While the application of process-based modeling approaches can provide quantitative information on pesticide exposure, there are nonetheless growing requirements for model development and improvement to better represent various hydrological and physico-chemical conditions at watershed scale, and for better model integration to address environmental, ecological and economic concerns. The Soil and Water Assessment Tool (SWAT) is an ecohydrological model used in over 3,000 published studies, including about ...


Cam-Based Passive Variable Friction Device For Structural Control, Austin Downey, Connor Theisen, Heather Murphy, Nicholas Anastasi, Simon Laflamme 2019 University of South Carolina - Columbia

Cam-Based Passive Variable Friction Device For Structural Control, Austin Downey, Connor Theisen, Heather Murphy, Nicholas Anastasi, Simon Laflamme

Civil, Construction and Environmental Engineering Publications

A solution to increasing the resiliency of civil structures with respect to natural and man-made hazards is the implementation of supplemental damping systems. These systems can be constructed using passive, active, and semi-active devices. In particular, passive devices are widely accepted in the field of structural engineering, because they do not require power to operate and can be holistically integrated into the structural design process. This paper investigates the use of 3D printing technology to expand on the possibilities in passive damping, notably in the fabrication of a variable friction device. This device uses a 3D printed cam with a ...


Quantifying Bonding Characteristics Between Uhpc And Normal-Strength Concrete For Bridge Deck Application, Sriram Aaleti, Sri Sritharan 2019 University of Alabama - Tuscaloosa

Quantifying Bonding Characteristics Between Uhpc And Normal-Strength Concrete For Bridge Deck Application, Sriram Aaleti, Sri Sritharan

Civil, Construction and Environmental Engineering Publications

Ultrahigh performance concrete (UHPC) is an advanced cementitious material which has excellent mechanical and durability properties, making it appropriate for the rehabilitation of concrete structures. This paper investigates the usage of a thin layer of UHPC overlaying a normal strength concrete (NC) deck. The behavior of the interface connection will have a significant impact on the overall structural and durability performance of the UHPC-NC composite deck system. An integrated experimental and analytical study was conducted to understand the influence of several variables, such as normal concrete strength, interface roughness, and curing condition on the shear transfer behavior across the interface ...


A Comparative Analysis Of Alliancing And Integrated Project Delivery On Complex Projects: Parallel Systems Sharing A Common Objective, Douglas D. Gransberg, H. David Jeong 2019 Iowa State University

A Comparative Analysis Of Alliancing And Integrated Project Delivery On Complex Projects: Parallel Systems Sharing A Common Objective, Douglas D. Gransberg, H. David Jeong

Douglas D. Gransberg

Relational contracting methods are a natural evolution from the many versions of project delivery that have been developed over the past two decades aimed at increasing the amount of integration and collaboration among mega-project stakeholders. Alliancing was born in the 1990’s in North Sea oilfields and imported down under to Australia and New Zealand where it has used to deliver over 300 complex projects. The litigious environment present in the North American construction sector led project owners to implement partnering programs to enhance the quality of relationships on projects of all sizes delivered using the full spectrum of delivery ...


Effective Tools For Projects Delivered By Construction Manager–General Contractor Method, Nicola West, Douglas D. Gransberg, James McMinimee 2019 Iowa State University

Effective Tools For Projects Delivered By Construction Manager–General Contractor Method, Nicola West, Douglas D. Gransberg, James Mcminimee

Douglas D. Gransberg

Construction manager–general contractor (CMGC) is an alternative project delivery method that is fast becoming more prevalently used to accelerate the delivery of highway projects. FHWA's Every Day Counts program is encouraging state departments of transportation (DOTs) to adopt CMGC as a tool to deliver badly needed rapid renewal projects. As part of the program, a CMGC Peer Exchange conference was held in June 2011 in Salt Lake City, Utah. This paper synthesizes the tools used in implementing CMGC project delivery that were reported in those conference presentations by state DOTs with CMGC experience. That information is compared with ...


Reducing Exposures Traffic-Related Air Pollution And Urban Building Design, Elliott Gall, Linda George 2019 Portland State University

Reducing Exposures Traffic-Related Air Pollution And Urban Building Design, Elliott Gall, Linda George

Linda A. George

No abstract provided.


Environmental Fate And Impact Assessment Of Thiobencarb Application In California Rice Fields Using Ricewq, Ruoyu Wang 2019 University of California, Davis

Environmental Fate And Impact Assessment Of Thiobencarb Application In California Rice Fields Using Ricewq, Ruoyu Wang

Ruoyu Wang

Thiobencarb is a commonly used herbicide in Northern California rice fields. Released paddy water containing thiobencarb may pose ecological risks to non-targeted organisms. In this research, the Rice Water Quality Model (RICEWQ) is  equilibrium tested and then calibrated using monitoring data at field level. Then it is employed to assess the environmental fate and impacts of thiobencarb in the Colusa Basin, and the effects of different management practices on water use and thiobencarb exposures. The model predicted thiobencarb concentrations from rice fields for multiple years throughout the Basin, using input from California Pesticide Use Reporting (PUR) database, and assessed both ...


User Manual - Bmp Trains 2020 Newest Version, Martin Wanielista 2019 University of Central Florida

User Manual - Bmp Trains 2020 Newest Version, Martin Wanielista

BMP Trains

A user's manual to accompany the computer program called BMP Trains 2020. The user's manual provides example problems useful to understanding the program. The user's manual is updated when there is a need to respond to user inputs. This update is for version 1.2.10. The program is used to assess the average annual effectiveness of nutrient removal from combinations of stormwater BMPs. It follows design criteria for 14 BMPs in the State of Florida.


Download Bmp Trains 2020 Newest Version, Martin Wanielista 2019 University of Central Florida

Download Bmp Trains 2020 Newest Version, Martin Wanielista

BMP Trains

This is version 1.2.10. BMP Trains 2020 is a computer program used to assess the average annual removal effectiveness of nutrients. It is based on research from the State of Florida and uses design criteria in the State. It is accepted by regulatory agencies in the State. The development was supported by the Florida Department of Transportation. It is an improvement from all previous versions – most notably because of the departure from the Microsoft Excel platform to being programmed and compiled using the C++ programming language. The entire user interface and much of the internal function has been ...


Bmp Trains 2020 - Marty Wanielista May 2019, Martin Wanielista 2019 University of Central Florida

Bmp Trains 2020 - Marty Wanielista May 2019, Martin Wanielista

BMP Trains

Dr. Marty Wanielista's PowerPoint slides in PDF for May, 2019 BMP Trains workshop.

Extra information to respond to questions


Diagnostic Imaging Of Structural Concrete Using Ground Penetrating Radar And Ultrasonic Array, Sina Mehdinia, Thomas Schumacher, Eric Wan, Xubo Song 2019 Portland State University

Diagnostic Imaging Of Structural Concrete Using Ground Penetrating Radar And Ultrasonic Array, Sina Mehdinia, Thomas Schumacher, Eric Wan, Xubo Song

Student Research Symposium

Structural concrete is the most widely used construction material in the world. Many structures critical to a society such as bridges, hospitals, and airports are built with concrete. While this material is well understood from a mechanical design point of view, still no accurate quantitative tools exist to assess it for damage and deterioration. This is of particular concern for an urban area like Portland with a mega-thrust earthquake waiting to occur. Non-destructive evaluation tools that can quickly and accurately give a full picture of the integrity of structural concrete elements will be key to help plan effective and safe ...


Fluoride Removal From Water Using A 3d Printed Calcium Carbonate Filter, Sophia Bakar, David Kahler, Benjamin S. Goldschmidt 2019 Duquesne University

Fluoride Removal From Water Using A 3d Printed Calcium Carbonate Filter, Sophia Bakar, David Kahler, Benjamin S. Goldschmidt

Undergraduate Research and Scholarship Symposium

Groundwater containing high concentrations of fluoride is the most common source of drinking water in rural areas in parts of east Africa, India, and China. The elevated levels of fluoride cause skeletal and dental fluorosis, which is the weakening and decay of bone structures due to the leeching of calcium from the body as calcium and fluoride bond by the process of adsorption. Over 150 million people are suffering from some form of fluorosis due to the consumption of groundwater. Calcium carbonate has been demonstrated to influence fluoride removal in several forms. To make fluoride removal a cost-effective and user-friendly ...


Analytical And Numerical Modeling Of Cavity Expansion In Anisotropic Poroelastoplastic Soil, Kai Liu 2019 Louisiana State University and Agricultural and Mechanical College

Analytical And Numerical Modeling Of Cavity Expansion In Anisotropic Poroelastoplastic Soil, Kai Liu

LSU Doctoral Dissertations

Cavity expansion/contraction problems have attracted intensive attentions over the past several decades due to its versatile applications, such as the interpretation of pressuremeter/piezocone penetration testing results and the modelling of pile installation/tunnel excavation in civil engineering, and the prediction of critical mud pressure required to maintain the wellbore stability in petroleum engineering. Despite the fact that various types of constitutive models have been covered in the literature on this subject, the soils and/or rocks were usually treated as isotropic geomaterials.

In recognition of the above fact, this research makes a substantial extension of the fundamental cavity ...


Investigation Of The Effect Of Vehicle Color On Safety, Deogratias Eustace, Fayez Khalaf Alanazi, Peter W. Hovey 2019 University of Dayton

Investigation Of The Effect Of Vehicle Color On Safety, Deogratias Eustace, Fayez Khalaf Alanazi, Peter W. Hovey

Peter Hovey

No abstract provided.


Investigation Of The Effect Of Vehicle Color On Safety, Deogratias Eustace, Fayez Khalaf Alanazi, Peter W. Hovey 2019 University of Dayton

Investigation Of The Effect Of Vehicle Color On Safety, Deogratias Eustace, Fayez Khalaf Alanazi, Peter W. Hovey

Deogratias Eustace

No abstract provided.


Modeling Socio-Economic Determinants Of Traffic Fatalities, Amin Azimian, Deogratias Eustace 2019 University of Dayton

Modeling Socio-Economic Determinants Of Traffic Fatalities, Amin Azimian, Deogratias Eustace

Deogratias Eustace

Over several decades, traffic growth has caused an increased number of traffic crashes, which are associated with economic losses and human sufferings. According to the National Highway Traffic Safety Administration [1] in 2016 there were a total of 34,247 fatal traffic crashes in the United States that resulted into 37,133 fatalities. Risk factors relating to the occurrence of fatal and injury severity of motor vehicle crashes have been extensively studied. Most studies [2-7] that have attempted to model the occurrences of traffic crashes and fatalities have been mainly confined to factors related to driver characteristics, roadway geometry characteristics ...


Restricted Crossing U-Turns At Rural Intersections, Timothy Adams 2019 University of Nebraska - Lincoln

Restricted Crossing U-Turns At Rural Intersections, Timothy Adams

Civil Engineering Theses, Dissertations, and Student Research

This study examines the potential for replacing the standard intersection design at two-way stop control (TWSC) and all-way stop control (AWSC) intersections along rural highways with a roundabout or a restricted crossing u-turn (RCUT) facility. The geometry of the RCUT design prohibits left and through movements from the side road, and provides a u-turn location downstream from the main crossing. This type of facility has been implemented for rural highways extensively in other states and has the potential to serve as a cost-effective solution to improve roadway safety within Nebraska.

Comparative analysis is conducted for three site locations (Humphrey, Madison ...


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