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Civil and Environmental Engineering

2014

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Articles 1 - 27 of 27

Full-Text Articles in Architecture

Wind And Thermal Effects On Ground Mounted Photovoltaic (Pv) Panels, Chowdhury Mohammad Jubayer Dec 2014

Wind And Thermal Effects On Ground Mounted Photovoltaic (Pv) Panels, Chowdhury Mohammad Jubayer

Electronic Thesis and Dissertation Repository

A combination of Computational Fluid Dynamics (CFD) simulations and wind tunnel experiments are carried out to investigate the effects of wind on the aerodynamic loading and heat transfer of a ground mounted stand-alone photovoltaic (PV) panel with tilt angle of 25o in open country atmospheric boundary layer. Several azimuthal wind directions are considered: Southern 0o, Southwest 45o, Northwest 135o and Northern 180o. Three dimensional Reynolds-Averaged Navier-Stokes (RANS) approaches with an unsteady solver using Shear Stress Transport (SST) k-ω turbulence closure are employed for the CFD simulations, whereas Particle Image Velocimetry (PIV) and Hot Wire Anemometry ...


Methane Production By A Packed-Bed Anaerobic Digester Fed Dairy Barn Flush Water, Sean Richard Thomson Dec 2014

Methane Production By A Packed-Bed Anaerobic Digester Fed Dairy Barn Flush Water, Sean Richard Thomson

Master's Theses and Project Reports

Packed-bed digesters are an alternative to covered lagoon digesters for methane production and anaerobic treatment of dilute wastewaters such as dairy barn flush water. The physical media of packed-beds retain biofilms, often allowing increased treatment rates. Previous studies have evaluated several types of media for digestion of dilute wastewaters, but cost and media fouling have setback commercial development. A major operational cost has been effluent recirculation pumping.

In the present effort, a novel approach to anaerobic digestion of flush dairy water was developed at pilot-scale: broken walnut shells were used as a low-cost packed-bed medium and effluent recirculation was replaced ...


The Relationship Between Bicycles And Traffic Safety For All Road Users, Jasmine A. Martin Dec 2014

The Relationship Between Bicycles And Traffic Safety For All Road Users, Jasmine A. Martin

Master's Theses and Project Reports

Over the past twenty years bicycle use as a mode of transportation has grown considerably in the United States. Other studies have examined the individual bicyclist’s risk in proportion to the growth in cycling across cities, a phenomenon referred to as ‘safety in numbers.’ This study expands from that research and examines the effect of cyclists on road safety for all road users.

The study examines the roles of bicycle modal split, a city wide analysis, and bicycle infrastructure, a site based analysis, in road safety outcomes. For the city based analysis, twenty years of crash data in 12 ...


Understanding Immigrants' Travel Behavior In Florida: Neighborhood Effects And Behavioral Assimilation, Nishat Zaman Nov 2014

Understanding Immigrants' Travel Behavior In Florida: Neighborhood Effects And Behavioral Assimilation, Nishat Zaman

FIU Electronic Theses and Dissertations

The goal of this study was to develop Multinomial Logit models for the mode choice behavior of immigrants, with key focuses on neighborhood effects and behavioral assimilation. The first aspect shows the relationship between social network ties and immigrants’ chosen mode of transportation, while the second aspect explores the gradual changes toward alternative mode usage with regard to immigrants’ migrating period in the United States (US). Mode choice models were developed for work, shopping, social, recreational, and other trip purposes to evaluate the impacts of various land use patterns, neighborhood typology, socioeconomic-demographic and immigrant related attributes on individuals’ travel behavior ...


The Bridge Newsletter Winter 2014, Missouri University Of Science And Technology Oct 2014

The Bridge Newsletter Winter 2014, Missouri University Of Science And Technology

The Bridge Newsletter

-Smart living
-Bodapati earns lifetime award
-TMS honors Myers
-Mays receives award for research


Wind-Induced Pressures In Air Permeable, Double-Layer Roof Systems In Regions Of Separated Flow, Jeong Hee Oh Aug 2014

Wind-Induced Pressures In Air Permeable, Double-Layer Roof Systems In Regions Of Separated Flow, Jeong Hee Oh

Electronic Thesis and Dissertation Repository

This thesis is concerned with the wind-induced pressure distribution acting on air permeable, double-layer roof systems placed on low-rise buildings. Because of the pressure transmission into the cavity between layers, the pressure difference in the double-layer systems differs significantly from that in a single layer. The interior pressures (in the cavity between layers) are highly correlated with external pressures at the openings on the external surface of the outer layer and thereby, the net wind load for the design of the outer layer is considerably reduced by the pressure equalization between the external and internal surfaces of the outer layer ...


Relationship Between The Collapse Fragility And Collapse Risk In Existing Buildings In Regions Of High And Moderate Seismicity, David John Bretl Jul 2014

Relationship Between The Collapse Fragility And Collapse Risk In Existing Buildings In Regions Of High And Moderate Seismicity, David John Bretl

Civil Engineering Graduate Theses & Dissertations

This thesis aims to identify a relationship between the probability of collapse of existing buildings subjected to MCE/MCER shaking and the mean number of collapses per expected building lifetime (τ) in regions of high and moderate seismicity. It encompasses 23 highly seismic locations and 21 moderately seismic locations spread across the United States and considers 35 different building types at each location. The study uses a risk integral to calculate an annual rate of collapse to use for comparison with collapse probabilities, and then uses the scoring system from FEMA 154 as a methodology to consistently compare the ...


Many Objective Analysis To Optimize Pumping And Releases In A Multi-Reservoir Water Supply Network, Rebecca Smith Jul 2014

Many Objective Analysis To Optimize Pumping And Releases In A Multi-Reservoir Water Supply Network, Rebecca Smith

Civil Engineering Graduate Theses & Dissertations

Past research has proven the utility of using multiobjective evolutionary algorithms (MOEAs) to optimize complex water management problems with many conflicting performance objectives. This study expands on the multiobjective optimization methodology by embedding a sophisticated RiverWare model in the algorithm search loop. The main challenges beyond linking the algorithm and model were due to the model's long simulation time and the complexity of the model. Addressing the simulation time necessitated several creative approaches to ensure efficient but thorough algorithm search and intelligent representation of hydrologic variability. Successfully addressing these issues confirms that advanced detailed operations models for civil infrastructure ...


Coastal Defenses, U.S., Bert Chapman Jul 2014

Coastal Defenses, U.S., Bert Chapman

Libraries Faculty and Staff Scholarship and Research

Provides an overview of U.S. military coastal defenses during the period up to and including the War 1812.


No Admixture, Sustainable, Self-Consolidating Grout, Craig V. Baltimore Dr Jul 2014

No Admixture, Sustainable, Self-Consolidating Grout, Craig V. Baltimore Dr

Craig V. Baltimore

ABSTRACT: The consolidation of grout in concrete masonry unit (CMU) walls is labor-intensive. Also, the grout’s Portland cement content has a high embodied energy demand – a non-sustainable characteristic. For the labor-intensive issue, chemical admixture self-consolidating grouts have been used in walls 12.67 ft. (3.86 m) tall, however the chemical additive can impose new limitations on the grout (non-robust characteristics). No admixture self-consolidating grout with high percentage Portland cement replacement have potential for robust and sustainable application.

This paper reports on the consolidation of no admixture self-consolidating grout made by substituting high percentages of Portland cement with Type-F ...


Where To Park? The East Campus Dilemma, Matthew Lewis Jun 2014

Where To Park? The East Campus Dilemma, Matthew Lewis

James Madison Undergraduate Research Journal (JMURJ)

James Madison University's East Campus expansion has created parking problems. Student struggle to find a decent parking spot, sacrificing time to park and then perhaps more time to walk to class. This research project seeks answers to the parking problems on the east side of campus, specifically the Festival and Convocation lots. Should students spend time navigating the Festival lot looking for a spot or should they go directly to the Convocation lot? The data and research explain why the latter solution is much more efficient.


Multi-Criteria Decision Modeling For Best Value Selections In Target Value Design Integrated Project Delivery, Brent Patrick Griffis Jun 2014

Multi-Criteria Decision Modeling For Best Value Selections In Target Value Design Integrated Project Delivery, Brent Patrick Griffis

Master's Theses and Project Reports

Integrated Project Delivery (IPD) combined with Target Value Design (TVD) is a better way to deliver value for the client than traditional guaranteed maximum price (GMP) methods. With traditional GMP delivery methods, the interests of the parties are often at odds. The goal of IPD is to align all party interests in order to achieve a win-win scenario. Due to the aligning nature of IPD and the fact that each party’s success is dependent on achieving the project objectives as a whole; a non-biased, transparent, decision-making process is necessary in order to deliver the project objectives within the constraints ...


Ogden College Of Science & Engineering Newsletter (Summer 2014), Cheryl Stevens, Dean May 2014

Ogden College Of Science & Engineering Newsletter (Summer 2014), Cheryl Stevens, Dean

Ogden College of Science & Engineering Publications

No abstract provided.


Application Of Stormwater Management Techniques For Mitigation And Education At The Stockbridge School Agricultural Learning Center, Samantha R. Anderson Apr 2014

Application Of Stormwater Management Techniques For Mitigation And Education At The Stockbridge School Agricultural Learning Center, Samantha R. Anderson

Landscape Architecture & Regional Planning Masters Projects

The Stockbridge School Agricultural Learning Center (SSALC) will be a 40-acre hands-on agricultural learning laboratory for students, staff, visitors, and neighbors. Still in its planning phases, the Center will be located on what is currently a hay field just north of UMass Amherst campus. A conceptual master plan was created in 2013 that is being used for fundraising as well as planning for agricultural demonstration plots and architectural hubs. Improperly managed agricultural landscapes are known as one of the biggest threats to water quality in the United States. As a model of forward thinking agricultural practices, properly managed stormwater on ...


Student Spotlight On Research And Outreach Proceedings, Suny College Of Environmental Science And Forestry Apr 2014

Student Spotlight On Research And Outreach Proceedings, Suny College Of Environmental Science And Forestry

Student Spotlight on Research and Outreach

ESF's annual Spotlight Symposium is a dynamic forum where graduate and undergraduate students share the results of their research and community service projects. The Spotlight is a student poster session highlighting scholarly efforts.


Shakers - South Union, Kentucky (Sc 1328), Manuscripts & Folklife Archives Mar 2014

Shakers - South Union, Kentucky (Sc 1328), Manuscripts & Folklife Archives

MSS Finding Aids

Finding aid only for Manuscripts Small Collection 1328. Letters, written by South Union, Kentucky Shaker leaders, to leaders of the Hancock Shaker Society, Pittsfield, Massachusetts, discussing the building of mills and dam, economic conditions, and religious affairs. The original letters are in the Library of Congress.


Quantifying And Modeling Stream-Aquifer Interactions In The Elkhorn River Basin, Nebraska, Can Liu Mar 2014

Quantifying And Modeling Stream-Aquifer Interactions In The Elkhorn River Basin, Nebraska, Can Liu

Dissertations & Theses in Natural Resources

This study combined statistical analyses, field investigations and numerical groundwater flow modeling to quantify the connectivity between the Elkhorn River and its adjacent aquifers in Nebraska. The Mann-Kendall trend tests were conducted to detect increasing or decreasing tendencies on the time series data of streamflow, which were collected from eighteen gauging stations in the Elkhorn River and its tributaries. Decreasing trends were not found in the annual streamflow data.

Field investigation of streambed hydraulic properties was performed in the Elkhorn River near Winslow and Norfolk. Vertical hydraulic conductivities (Kv) of the shallow streambed sediments were obtained by in-situ permeameter ...


The Bridge Newsletter Spring 2014, Missouri University Of Science And Technology Feb 2014

The Bridge Newsletter Spring 2014, Missouri University Of Science And Technology

The Bridge Newsletter

-Reusing scrap tires
-Renaissance man
-Energy research published
-Follow your passion


The Actual Cost Of Food Systems On Roadway Infrastructure, Omar G. Smadi, Inya Nlenanya, Marwan Ghandour, Silvina Lopez Barrera Jan 2014

The Actual Cost Of Food Systems On Roadway Infrastructure, Omar G. Smadi, Inya Nlenanya, Marwan Ghandour, Silvina Lopez Barrera

Silvina Lopez Barrera

This project was designed to provide more insight into the infrastructure challenges of agricultural enterprises in Iowa and to also facilitate the understanding needed to implement broader energy-related policy and planning. This work will also provide farmers and farmer networks with the necessary resources to justify increased local and state investments in the local and regional food systems.


Regeneration Of Liquid Desiccants In Evacuated Tube Solar Collectors, Darrell J. Hubler Jan 2014

Regeneration Of Liquid Desiccants In Evacuated Tube Solar Collectors, Darrell J. Hubler

Civil Engineering Graduate Theses & Dissertations

Liquid desiccants can be regenerated by heating the solution to evaporate water from the solution. While conventional methods rely on the vapor pressure difference between water in the solution and that in moist air, it has been proposed to directly boil the desiccant in evacuated tube solar collectors. Regeneration by boiling makes the evacuated tube regenerator less susceptible to performance decreases due to humid weather. The low thermal loss through the walls of the evacuated tube also allows regeneration in colder climates.

An experimental study was conducted to characterize the opportunity to directly regenerate liquid desiccants in evacuated tube solar ...


Improving Enrollment In The Construction Management Graduate Program Through Students’ Perspectives, Mouloud Messaoudi Jan 2014

Improving Enrollment In The Construction Management Graduate Program Through Students’ Perspectives, Mouloud Messaoudi

Master of Technology Management Plan II Graduate Projects

Low enrollment and the decrease in graduation and retention rates are challenges facing the growth of the Master’s in Technology Management – Construction Management (MTM-CM) program at BGSU. In addition, the competition between the universities to enroll and retain more in-state, out-of-state, and international students is aggressive. There is a need for a revaluation for the MTM-CM program in order to attract more students in the future. This study is a necessary step to know what the MTM-CM students think about the product delivered to them at BGSU. There was no prior study investigating the satisfaction level of the construction ...


Stochastic Optimization Of Building Control Systems For Mixed-Mode Buildings, Ryan Adams Tanner Jan 2014

Stochastic Optimization Of Building Control Systems For Mixed-Mode Buildings, Ryan Adams Tanner

Civil Engineering Graduate Theses & Dissertations

Mixed mode (MM) buildings are a subset of low-energy buildings that employ both natural mechanical ventilation, often using manually operable windows for natural ventilation, along with other low-exergy cooling systems such as radiant cooling. This combination of systems has proven difficult to control in practice, in particular due to the potential for occupants to significantly impact building performance. Model predictive control (MPC) and rule extraction are promising methods for optimizing MM building systems in an offline setting, and for generating usable control rules that can be implemented in practice.

Simulation studies were performed to investigate the impact that occupant actions ...


Measuring Project Integration Using Relational Contract Theory, Christofer Michael Harper Jan 2014

Measuring Project Integration Using Relational Contract Theory, Christofer Michael Harper

Civil Engineering Graduate Theses & Dissertations

Traditional project design and construction delivery methods are segmental. Researchers and construction practitioners often cite the separation, or "silo effect", as a reason for poor project outcomes. Recently, design-build (DB) and construction manager / general contractor (CMGC) delivery methods have gained favor in the delivery of design and construction projects. However, DB and CMGC contracts are still two-party agreements where the contract language remains similar to traditional design-bid-build methods, which poses a problem in that the contract does little to improve interactions between the contracting parties, which is one reason claims and litigation occur regularly in the construction industry.

An emerging ...


Modeling And Simulation Of Pcm-Enhanced Façade Systems, Saleh Nasser Al-Saadi Jan 2014

Modeling And Simulation Of Pcm-Enhanced Façade Systems, Saleh Nasser Al-Saadi

Civil Engineering Graduate Theses & Dissertations

Building façade contributes to the overall architectural aesthetic but can be utilized for heat storage when proper systems are incorporated. Latent heat storage such as using a phase change material (PCM) gains growing attentions recently due to its ability of storing significant thermal energy within a small volume, making it one of most promising technologies for developing energy efficient buildings.

This research is focused on modeling and simulation of PCM when integrated into advanced façade systems. The study first reviews the different mathematical modeling methods generally used for PCM's simulations. It categorizes the PCM's numerical models that are ...


Assessing The Impact Of Occupant Behavior On Pre- And Post-Retrofit Energy Usage In Multi-Family Housing, Anna Louise Osborne Jan 2014

Assessing The Impact Of Occupant Behavior On Pre- And Post-Retrofit Energy Usage In Multi-Family Housing, Anna Louise Osborne

Civil Engineering Graduate Theses & Dissertations

This investigation creates a tool to aid in the assessment of the impacts that behavior modifications and retrofits have on whole building energy usage. The tool was created to analyze pre- and post-retrofit/behavior modification data to determine the degree of savings incurred. The main focus of the project is a sensitivity analysis on the effects of behavior. The study includes the impacts of high- and low-energy-consuming behavior, and the total savings when coupled with building energy retrofits. For heating-dominated climates, results show a potential energy use savings of 10% from behavior, and a savings of 40% when combined with ...


Using Web Scraping Technology To Automatize Cost Data Collection For Calculating Construction Cost Indexes, Joseph Shrestha, H. David Jeong Dec 2013

Using Web Scraping Technology To Automatize Cost Data Collection For Calculating Construction Cost Indexes, Joseph Shrestha, H. David Jeong

Joseph Shrestha

Construction Cost Index (CCI) and Building Cost Index (BCI) published by Engineering News Record (ENR) are two of the very popular cost indexes used in the industry. Many state DOTs publishes their highway construction cost indexes to keep track of the current trend of cost escalation. The ENR BCI and ENR CCI are prepared by collecting cost data from agents of the 20 cities in the country. Such manual process of collecting cost data can be costly. The proposed method of price data collection, based on a computer technology called “web scraping,” can automatically collect material prices and labor wage ...


Dwr Based As-Built Schedule –Powerful But Highly Neglected Application Of Dwr Data, Joseph Shrestha, H. David Jeong Dec 2013

Dwr Based As-Built Schedule –Powerful But Highly Neglected Application Of Dwr Data, Joseph Shrestha, H. David Jeong

Joseph Shrestha

Daily work report (DWR) is a very important data recorded by the inspectors during the construction projects. Although, a lot of time and effort is invested to collect this big amount of DWR data, its use has been limited mostly to the contractor payment and dispute resolution. This study presents the methodological details about utilizing the historical DWR data to automatically generate the schedule for future projects based on the bid data. As a proof of concept of concept, as-built schedules has been developed from the DWR data. The as-built schedule generated can be used as a tool for more ...