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Implications Of Data Sampling Resolution On Water Use Simulation, End-Use Disaggregation, And Demand Management, A. Cominola, M. Giuliani, A. Castelletti, David E. Rosenberg, A. M. Abdallah 2018 Politecnico di Milano

Implications Of Data Sampling Resolution On Water Use Simulation, End-Use Disaggregation, And Demand Management, A. Cominola, M. Giuliani, A. Castelletti, David E. Rosenberg, A. M. Abdallah

Civil and Environmental Engineering Faculty Publications

Understanding the tradeoff between the information of high-resolution water use data and the costs of smart meters to collect data with sub-minute resolution is crucial to inform smart meter networks. To explore this tradeoff, we first present STREaM, a STochastic Residential water End-use Model that generates synthetic water end-use time series with 10-s and progressively coarser sampling resolutions. Second, we apply a comparative framework to STREaM output and assess the impact of data sampling resolution on end-use disaggregation, post meter leak detection, peak demand estimation, data storage, and meter availability. Our findings show that increased sampling resolution allows more accurate ...


The Skilled Framing Carpenter Shortage On The Central Coast Of California: A Focus On Residential Construction, Trevor John Nally 2018 California Polytechnic State University - San Luis Obispo

The Skilled Framing Carpenter Shortage On The Central Coast Of California: A Focus On Residential Construction, Trevor John Nally

Construction Management

The residential construction industry has many critical components. When one of these components is not operating optimally, it can be detrimental to the system as a whole. A critical component to residential construction is skilled craftspeople. Without them, there can be no significant physical work completed on any residential project. Currently the component of skilled craftspeople in residential construction is in a state of short supply. Throughout the United States, there is an inadequate amount of craftspeople to fill the demand for their skills. The Central Coast of California is experiencing this issue much like the rest of the nation ...


Perceptions Of Efficiency In Construction Jobsite Safety, Jay Doyle 2018 California Polytechnic State University, San Luis Obispo

Perceptions Of Efficiency In Construction Jobsite Safety, Jay Doyle

Construction Management

This project is to examine the perception of jobsite safety practices of California contractors. Preliminary research found that jobsite safety practices are not a hinderance on a project schedule when managed well. A survey of students and industry professionals was the methodology used to gather this information. This survey consisted of various questions about the perception of safety practices on jobsites the respondent has worked on themselves, as well as their perception about safety in the construction industry as a whole. Significant findings were that half of the surveyed individuals had worked on a job site in which they lost ...


Feasibility Analysis For Reclaim Device During Shotcrete Application, Cameron Neil Berkins 2018 California Polytechnic State University, San Luis Obispo

Feasibility Analysis For Reclaim Device During Shotcrete Application, Cameron Neil Berkins

Construction Management

Shotcrete application has proven advantages over cast-in-place concrete under many different situations. Ease of access, minimal formwork, and higher productivity are prime examples. Its uses have exponentially increased through technical innovations to improve the ready-mix, nozzlemen technique, application surfaces, and to ensure higher dependability of the equipment. Unfortunately, concrete waste is still one of the highest percentages of overall waste in the construction industry. Shotcrete rebound, the material that falls from the wall due to lack of cohesion during installation, has slowly been reduced due to ready-mix alterations over the years, but effective recycling processes have yet to be implemented ...


A Case Study On The Use Of Bluebeam On Commercial Construction Projects, Victor Michael Beglitsoff 2018 California Polytechnic State University, San Luis Obispo

A Case Study On The Use Of Bluebeam On Commercial Construction Projects, Victor Michael Beglitsoff

Construction Management

No matter the size, every construction project has their own unique characteristics and logistics that come with it. But one thing is certain, every project has a specific set of construction documents that include; contracts, drawings, specifications and other important information. To guarantee the overall success of the project, companies must find ways to be the most effective and efficient to reach their specific goals. Using a technological software such as Bluebeam allows companies to excel in what they do best. Using Bluebeam as their primary PDF viewer on construction projects allows them to approach their project with a positive ...


Chloride Concentration And Blow-Through Analysis For Concrete Bridge Decks Rehabilitated Using Hydro-Demolition, Elizabeth Ashleigh Roper 2018 Brigham Young University

Chloride Concentration And Blow-Through Analysis For Concrete Bridge Decks Rehabilitated Using Hydro-Demolition, Elizabeth Ashleigh Roper

All Theses and Dissertations

The objectives of this research were 1) to investigate the effects of hydrodemolition treatment timing on chloride concentration profiles in concrete bridge decks for depths of concrete removal below the top mat of reinforcing steel and 2) to investigate factors that influence the occurrence of blow-throughs in concrete bridge decks when hydrodemolition is used. The research results are intended to provide engineers with guidance about the latest timing of hydrodemolition that can maintain a chloride concentration level below 2.0 lb of chloride per cubic yard of concrete at the levels of both the top and bottom mats of reinforcing ...


Measuring And Calculating Current Atmospheric Phosphorous And Nitrogen Loadings On Utah Lake Using Field Samples, Laboratory Methods, And Statistical Analysis: Implication For Water Quality Issues, Jacob Milton Olsen 2018 Brigham Young University

Measuring And Calculating Current Atmospheric Phosphorous And Nitrogen Loadings On Utah Lake Using Field Samples, Laboratory Methods, And Statistical Analysis: Implication For Water Quality Issues, Jacob Milton Olsen

All Theses and Dissertations

Atmospheric nutrient loading and transport though precipitation and dry deposition is one of the least understood yet one of the most important pathways of nutrient transport into many lakes. These nutrients, phosphorus and nitrogen, are essential for aquatic life and often play major roles in algae blooms that occur in lakes and reservoirs. Often heavy algal growth intensifies a variety of water quality problems. Utah Lake may be even more susceptible to atmospheric deposition due to its large surface area to volume ratio and proximity to Great Basin dust sources. In this study, eight months of atmospheric deposition data were ...


Reinforcing Bar Splice Performance In Masonry With Self-Consolidating Grout, Aaron Brent Roper 2018 Brigham Young University

Reinforcing Bar Splice Performance In Masonry With Self-Consolidating Grout, Aaron Brent Roper

All Theses and Dissertations

The use of self-consolidating grout in reinforced masonry construction provides various advantages such as reduced labor, faster construction, decreased noise pollution and better structural response. This is a relatively new building material however, and little research on self-consolidating grout's structural properties has been conducted. The purpose of this study was to analyze the performance or bond capacity of steel reinforcing bar splices in masonry with self-consolidating grout. Twelve masonry panels approximately 40 in. wide and 32 in. tall consisting of Type S mortar and concrete masonry units grouted with self-consolidating grout and No. 5 steel reinforcing bars were constructed ...


An Analysis Of Using Error Metrics To Determine The Accuracy Of Modeled Historical Streamflow On A Global Scale, Elise Katherine Jackson 2018 Brigham Young University

An Analysis Of Using Error Metrics To Determine The Accuracy Of Modeled Historical Streamflow On A Global Scale, Elise Katherine Jackson

All Theses and Dissertations

Streamflow data is used throughout the world in applications such as flooding, agriculture, and urban planning. Understanding daily and seasonal patterns in streamflow is important for decision makers, so that they can accurately predict and react to seasonal changes in streamflow for the region. This understanding of daily and seasonal patterns has historically been achieved through interpretation of observed historical data at stream reaches throughout the individual regions. Developing countries have limited and sporadic observed stream and rain gage data, making it difficult for stakeholders to manage their water resources to their fullest potential. In areas where observed historical data ...


Redefining Commercial Vehicle Permitting And Credentialing Violations, Andrew Martin, Jennifer R. Walton, Valerie J. Keathley 2018 University of Kentucky

Redefining Commercial Vehicle Permitting And Credentialing Violations, Andrew Martin, Jennifer R. Walton, Valerie J. Keathley

Kentucky Transportation Center Research Report

The objective of this study was to analyze enforcement and adjudication of common commercial vehicle tax, credentialing, and safety offenses. This study examined violations of the International Fuel Tax Agreement and the Kentucky Intrastate Tax, Kentucky’s weight distance tax, Unified Carrier Registration, Kentucky size and weight laws, and federal safety regulations from 2004 to 2013. Statistical analysis showed declining conviction rates, increasing dismissal rates, and a drop in collections of court costs and fines associated with these offenses. In addition, adjudication varied significantly from district court to district court, which is creating an equity issue for motor carriers and ...


Anaerobic Co-Digestion Of Aqueous Liquid From Biosolids Pyrolysis, Seyedfatemeh Seyedi 2018 Marquette University

Anaerobic Co-Digestion Of Aqueous Liquid From Biosolids Pyrolysis, Seyedfatemeh Seyedi

Master's Theses (2009 -)

Pyrolysis is a process to treat biosolids and recover energy. During pyrolysis, conversion of organic matter to energy-rich products yields biochar, py-gas, and pyrolysis liquids (aqueous phase and non-aqueous bio-oil). The aqueous pyrolysis liquid (APL), is a high-COD liquid with no apparent use that contains polycyclic aromatic hydrocarbons and nitrogen-containing compounds. One potential beneficial use of APL is as a co-digestate to produce more biogas for renewable energy from anaerobic digesters at municipal water resource recovery facilities. Some of the organics in APL may be converted to biomethane via anaerobic digestion under proper conditions. However, some APL organics are known ...


Effect Of Low Aeration And Heat Drying On Anaerobic Digester Performance And Microbial Community, Dylan Thomas Friss 2018 Marquette University

Effect Of Low Aeration And Heat Drying On Anaerobic Digester Performance And Microbial Community, Dylan Thomas Friss

Master's Theses (2009 -)

This thesis describes three research projects on anaerobic digestion (AD) that investigated functional differences and relationships between microbial composition and digester function. Both archaeal and bacterial communities were characterized using high throughput (Illumina) sequencing technology with universal 16S rRNA gene primers. In the first project, limited aeration, and limited aeration with an aerotolerant enrichment culture were investigated as possible methods to increase digester functional performance in comparison to a strictly anaerobic control digester. No functional differences were observed at quasi-steady state between the limited aerated digester (LAD), limited aerated anaerobic digester augmented with an aerotolerant enrichment culture (LADE), and strictly ...


Longer Lasting Bridge Deck Overlays, David Q. Hunsucker, Kean H. Ashurst Jr., Brad W. Rister, David L. Allen, Eileen Grady 2018 University of Kentucky

Longer Lasting Bridge Deck Overlays, David Q. Hunsucker, Kean H. Ashurst Jr., Brad W. Rister, David L. Allen, Eileen Grady

Kentucky Transportation Center Research Report

The objective of this report is to determine the most effective method for bridge deck overlay construction and repair by assessing current practices; examining new products and technologies; and reviewing NCHRP (National Cooperative Highway Research Program) guidelines, state standard specifications, ASCE (American Society of Civil Engineers) infrastructure ratings, and original bridge core chloride penetration data. Based on the review, this report offers the following conclusions. Latex modified concrete (LMC) overlays perform well, provide a long service life, and are the most commonly used method of bridge deck rehabilitation. Ohio considers microsilica concrete (MSC) overlays as state of the art due ...


Simplified, Alternative Formulation Of Numerical Simulation Of Proton Exchange Membrane Fuel Cell, Russell L. Edwards 2018 Old Dominion University

Simplified, Alternative Formulation Of Numerical Simulation Of Proton Exchange Membrane Fuel Cell, Russell L. Edwards

Mechanical & Aerospace Engineering Theses & Dissertations

Three-Dimensional proton exchange fuel cell (PEMFC) operation in steady-state is simulated with computational fluid dynamics / multiphysics software that is based upon the finite-element method. PEMFC operation involves the simultaneous simulation of multiple, interconnected physics involving fluid flows, heat transport, electrochemical reactions, and both protonic and electronic conduction. Modeling efforts have varied by how they treat the physics occurring within and adjacent to the membrane-electrode assembly (MEA). Several approaches treat the MEA as part of the computational domain, solving multiple, and coupled conservation equations via the CFD approach within the 3 regions of the MEA. The thickness dimensions of the 3 ...


Predicting Effects Of Climate Change And Sea Level Rise On Hydrologic Processes In A Mid-Atlantic Coastal Watershed, Rui Li 2018 Old Dominion University

Predicting Effects Of Climate Change And Sea Level Rise On Hydrologic Processes In A Mid-Atlantic Coastal Watershed, Rui Li

Civil & Environmental Engineering Theses & Dissertations

This dissertation assessed impacts of Climate Change (CC) and Sea Level Rise (SLR) on coastal hydrologic processes using the Lynnhaven River watershed as a test bed. The watershed is part of Chesapeake Bay Watershed and hydraulically connected with mid-Atlantic Ocean. Six CC scenarios were considered in terms of eight Regional Climate Models’ predictions for three Intergovernmental Panel on Climate Change (IPCC) emission assumptions, namely, B1, A1B, and A2, for two future periods, namely 2046 to 2065 and 2081 to 2099. The ensemble means of downscaling results from four methods were used to represent the future climates. On the other hand ...


Techno-Economic And Life Cycle Assessment Of Hydrothermal Processing Of Microalgae For Biofuels And Co-Product Generation, Andrew P. Bessette 2018 Old Dominion University

Techno-Economic And Life Cycle Assessment Of Hydrothermal Processing Of Microalgae For Biofuels And Co-Product Generation, Andrew P. Bessette

Civil & Environmental Engineering Theses & Dissertations

Traditional processing methods of algae to biofuels require dewatering after harvesting of the algae before the lipids can be extracted. This is typically the most energy intensive and therefore the most expensive step. Old Dominion University (ODU) has successfully utilized a flash hydrolysis (a kind of hydrothermal) process where proteins are solubilized into the liquid phase of product and the remainder lipid-rich, low nitrogen product is separated into a solid phase. The solid phase (lipid-rich) is then an ideal candidate for biofuel feedstock and the liquid phase, or hydrolysate, can be used for coproducts such as a source of nutrients ...


Simplified Approach For Structural Evaluation Of Flexible Pavements At The Network Level, Karthikeyan Loganathan 2018 University of Texas at Tyler

Simplified Approach For Structural Evaluation Of Flexible Pavements At The Network Level, Karthikeyan Loganathan

Civil Engineering Theses

Currently, there is no simple procedure available to identify structurally weak pavement sections using Falling Weight Deflectometer (FWD) data at the network level (e.g., city, state or province). A simple method is needed to determine the structural condition of pavement sections that can be directly implemented and automated in the current pavement databases. The method needs to be simple enough to be used with a network level FWD database for the purpose of numerically ranking pavement sections at the network level from good to poor. Backcalculation has been utilized to obtain layer moduli and determine overlay (new added surface ...


Artificial Recharge Of Groundwater As A Management Tool For The Kabul Basin, Afghanistan, Mohammad Farid Masoom 2018 Louisiana State University

Artificial Recharge Of Groundwater As A Management Tool For The Kabul Basin, Afghanistan, Mohammad Farid Masoom

LSU Master's Theses

Decades of war and political instability, consecutive droughts, population increase and displacement, caused serious infrastructural damages to water resources of Afghanistan. The main source of water supply for people in Afghanistan is groundwater. However, over-exploitation of groundwater has led to groundwater level declines in most parts of the country. Kabul, the largest city of Afghanistan, is the capital city with a population of 4.5 million and the fifth fastest-growing city in the world. The city has observed groundwater level declines of 5-10 meters (m) since 1980. Decline of about 30 m has also been observed in one of the ...


Construction Techniques For Electrically Conductive Heated Pavement Systems, Hesham Abdualla, Halil Ceylan, Kristen S. Cetin, Sunghwan Kim, Peter C. Taylor, Mani Mina, Bora Cetin, Kasthurirangan Gopalakrishnan, Sajed Sadati 2018 Iowa State University

Construction Techniques For Electrically Conductive Heated Pavement Systems, Hesham Abdualla, Halil Ceylan, Kristen S. Cetin, Sunghwan Kim, Peter C. Taylor, Mani Mina, Bora Cetin, Kasthurirangan Gopalakrishnan, Sajed Sadati

Civil, Construction and Environmental Engineering Conference Presentations and Proceedings

Ice and snow accumulation on airport paved surfaces has the potential to cause fatal accidents and monetary loss due to flight delays and cancellations. Traditional de-icing methods involving the application of chemicals or salt and employing large machines can create negative environmental and structural impact on airport infrastructure systems. These methods are also considered to be labor intensive and a safety hazard, especially in congested areas such as aprons. Heated pavement systems using electrically conductive concrete (ECON) have been proposed as a promising alternative technology for preventing ice accumulation and mitigating the adverse effects of using traditional snow removal methods ...


Hydrology And Phosphorus Model For Agricultural Watershed: Swat Simulation Of Discharge And Nutrient Flux In The Medway Creek Watershed, Omar EL Abusanina 2018 The University of Western Ontario

Hydrology And Phosphorus Model For Agricultural Watershed: Swat Simulation Of Discharge And Nutrient Flux In The Medway Creek Watershed, Omar El Abusanina

Electronic Thesis and Dissertation Repository

High nutrient concentrations in surface water have been a serious concern that impacts water quality and ecology. High Phosphorus levels in Medway Creek indicate the presence of a pollution source in the watershed that needs to be identified and quantified. To investigate this issue, the Soil and Water Assessment Tool (SWAT) program has been used in this study with the Geographic Information System (GIS) to model the Medway Creek watershed and assess stream flow and nutrient flux. In this research, the SWAT model has been built, calibrated, and validated using two independent observed data sets to evaluate the SWAT efficiency ...


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