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Articles 1171 - 1200 of 2170
Full-Text Articles in Architecture
Seeps And Springs At A Platteville “Observatory” On The River Bluffs, Bj Bonin, Greg Brick, Julia R. Steenberg
Seeps And Springs At A Platteville “Observatory” On The River Bluffs, Bj Bonin, Greg Brick, Julia R. Steenberg
Sinkhole Conference 2015
Residential building construction along the Mississippi River bluffs in the 1970s created a unique enclosed outcrop of the Late Ordovician Platteville Formation at Lilydale, Minnesota. This outcrop was examined in early 2013 after a newly-formed spring flooded an elevator shaft the previous year, drawing attention to the foundation conditions. The Lexington Riverside property is a six story condominium complex constructed within the top of the bluff. A two-level underground parking garage was built into the bluff. Bedrock was mechanically excavated to accommodate the construction of the building, creating an unweathered rock surface. The space between the structure and the excavated …
Rans Modeling Of Stably Stratified Turbulent Boundary Layer Flows In Openfoam®, Jordan M. Wilson, Subhas K. Venayagamoorthy
Rans Modeling Of Stably Stratified Turbulent Boundary Layer Flows In Openfoam®, Jordan M. Wilson, Subhas K. Venayagamoorthy
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Quantifying mixing processes relating to the transport of heat, momentum, and scalar quantities of stably stratified turbulent geophysical flows remains a substantial task. In a stably stratified flow, such as the stable atmospheric boundary layer (SABL), buoyancy forces have a significant impact on the flow characteristics. This study investigates constant and stability-dependent turbulent Prandtl number (Prt) formulations linking the turbulent viscosity (νt) and diffusivity (κt) for modeling applications of boundary layer flows. Numerical simulations of plane Couette flow and pressure-driven channel flow are performed using the Reynolds-averaged Navier-Stokes (RANS) framework with the standard k-ϵ turbulence model. Results are compared with …
Enhanced Series-Parallel Model For Estimating The Time-Dependent Thermal Conductivity Of Fly Ash Soil Mixtures, Xin Kang, Louis Ge
Enhanced Series-Parallel Model For Estimating The Time-Dependent Thermal Conductivity Of Fly Ash Soil Mixtures, Xin Kang, Louis Ge
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
An enhanced series-parallel (S-II) model of one-dimensional conductive heat flow through a unit cell was developed to estimate the time-dependent thermal conductivity of Class C fly ash stabilized soils. The unit cell is composed of three separate heat flow paths: a continuous path through solid contacts (soil contacts, fly ash contacts, and soil fly ash contacts) in parallel arrangement, a series-parallel path of solids in a series arrangement with a parallel arranged path of solid-miniscule pores (miniscule portion of solid water and miniscule portion of solid air), and a continuous path through water and air in parallel arrangement. The solid-miniscule …
The Bridge Newsletter Winter 2015, Missouri University Of Science And Technology
The Bridge Newsletter Winter 2015, Missouri University Of Science And Technology
The Bridge Newsletter
-S&T’s Solar House Design Team sets out to redefine the American housing market
-A monumental anniversary
-Academy awards Sneed
-ASCE honors Holmes
The Professional Constructor, Full Issue, Volume 39, Number 02
The Professional Constructor, Full Issue, Volume 39, Number 02
The Professional Constructor
No abstract provided.
Ecoscience + Art Initiative: Designing A New Paradigm For College Education, Scholarship, And Service, Changwoo Ahn
Ecoscience + Art Initiative: Designing A New Paradigm For College Education, Scholarship, And Service, Changwoo Ahn
The Transdisciplinary STEAM+ Journal
The paper presents a new initiative, EcoScience + Art, which blooms at George Mason University. The creator explains the background, history, and recent activities of the initiative, and also introduces an on-going special project called “The Rain Project”, a student participatory project to design, construct, and monitor a green infrastructure (i.e., floating wetland) for sustainable stormwater management on campus. The special project is geared to design and present a new paradigm to integrate college education, scholarship, and service. The relevance of the initiative and the special project to STEAM education is discussed.
Investigating The Correlation Between Freeway Service Levels And Freeway Service Patrol Assists, Nora Chin
Investigating The Correlation Between Freeway Service Levels And Freeway Service Patrol Assists, Nora Chin
Master's Theses
The Bay Area Metropolitan Transportation Commission’s (MTC) Freeway Service Patrol’s highway motorist response service is reporting a reduction in their service levels. We analyze the relationship between the reduction in the Bay Area Freeway Service Patrol’s (FSP) motorist assists and changes in vehicle miles traveled (VMT), California Highway Patrol (CHP) reported incidents, and cover research on the impact of new and old vehicle fleet turnover. VMT and CHP incidents have differential effects on FSP assists. Although incidents occurring on freeways with high traffic flows tend to cause more congestion, the trend in local VMT along Bay Area freeway corridors does …
Project Delivery Methods For The Construction Of Public Schools In The Southeastern United States, Dennis C. Bausman
Project Delivery Methods For The Construction Of Public Schools In The Southeastern United States, Dennis C. Bausman
The Professional Constructor
Construction of new facilities is a risky enterprise due to the situational aspects of the project, multiple parties involved in the process, timing and budget constraints, and the design features and quality levels required by the owner. Decision makers are charged with selecting a project delivery system to successfully manage the design and construction process in order to meet the owner’s needs. This paper documents the delivery methods utilized for the construction of public schools in Florida, Georgia, North Carolina, and South Carolina from 2006 to 2012 and provides insight into the reasons for the delivery method selections made by …
Construction Degree Graduates: An Evaluation Of Depth Of Skill Understanding And Skill Priority By Construction Industry Professionals, Ben F. Bigelow, Edelmiro Escamilla, Lauren Kuecker
Construction Degree Graduates: An Evaluation Of Depth Of Skill Understanding And Skill Priority By Construction Industry Professionals, Ben F. Bigelow, Edelmiro Escamilla, Lauren Kuecker
The Professional Constructor
Previous studies have been conducted to determine the skills the construction industry expects graduates and entry level professionals to possess. The majority of those studies report soft skills and technical expertise as the main qualities graduates should have upon entering the industry. Many differing skills have been reported, but neither the expected depth of understanding in those skills nor the industry’s priority of those skills have been explored. To do so, a survey was administered to members of the Construction Industry Advisory Council at Texas A&M University asking these questions. Depth of understanding was evaluated on a four level basis …
Accident Patterns In Road Construction Work Zones, Tariq Shehab, Leah Phu
Accident Patterns In Road Construction Work Zones, Tariq Shehab, Leah Phu
The Professional Constructor
Traffic safety in road construction zones has always been a major concern for engineering practitioners, departments of transportation, law enforcement professionals, researchers and many others. Due to the deteriorated condition of road and underground infrastructure facilities in the United States, the number of rehabilitation projects and their associated traffic accidents have increased over the past few years. To perform the needed road and underground utility rehabilitation activities in safer environments, researchers need to understand the causes behind these accidents. Although many researchers have been exploring the safety of many construction activities, research pertaining to road construction projects is lacking and …
Reviewer Thank You, Jason Lucas
A Framework For Small-Scale Construction Projects By Ngos In Developing Countries, James D. Goedert, Bradley Cory
A Framework For Small-Scale Construction Projects By Ngos In Developing Countries, James D. Goedert, Bradley Cory
The Professional Constructor
This paper outlines a theoretical framework for NGOs who are building small-scale construction projects in developing countries. The framework is a step-by-step procedure to guide NGOs from developing project parameters at the start of the project with the partner to a locally controlled sustainable project closeout. The authors used the integrative project delivery approach along with past construction research models and personal experience to guide the development of the framework. Steps within the framework are illustrated using five projects from three countries. This work assumes that the ultimate objective of the project is local operational sustainability with the NGO’s presence …
Assessment Of Empirical Equations For The Compression Index Of Fine-Grained Soils In Missouri, Site Onyejekwe, Xin Kang, Louis Ge
Assessment Of Empirical Equations For The Compression Index Of Fine-Grained Soils In Missouri, Site Onyejekwe, Xin Kang, Louis Ge
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The use of correlations and empirical relationships in geotechnical engineering provides a fast, cost-effective means of predicting the value of a parameter based on the values of certain other, possibly more easily determined, parameters. The correlation between two or more soil properties has been found to be dependent in varying degrees on soil type, the testing method used to obtain the numerical value of the parameter itself and the homogeneity of the soil. Many empirical correlations among soil properties have been published. These correlations, based on widely sourced data, may not be appropriate for local situations. Hence, there is a …
Accumulation Of Gas-Phase Methamphetamine On Clothing, Toy Fabrics, And Skin Oil, G. Morrison, N. V. Shakila, K. Parker
Accumulation Of Gas-Phase Methamphetamine On Clothing, Toy Fabrics, And Skin Oil, G. Morrison, N. V. Shakila, K. Parker
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
To better understand methamphetamine exposure and risk for occupants of former residential clandestine methamphetamine laboratories, we measured the dynamic accumulation of methamphetamine in skin oil, cotton and polyester (PE) clothing, upholstery, and toy fabric (substrates) exposed to 15-30 ppb (91-183 μg/m3) neutral methamphetamine in air for up to 60 days. The average equilibrium partition coefficients at 30% RH, in units of μg of methamphetamine per gram of substrate per ppb, are 3.0 ± 0.2 for a PE baby blanket, 5.6 ± 3.5 for a PE fabric toy, 3.7 ± 0.2 for a PE shirt, 18.3 ± 8.0 for a PE/cotton …
Thermal Energy Storage In Building Integrated Thermal Systems: A Review. Part 2. Integration As Passive System, Dervilla Niall, Sarah Mccormack, Philip Griffiths, Luisa Cabeza, Lidia Navarro, Albert Castell, Alvaro De Grazia, Maria Brown
Thermal Energy Storage In Building Integrated Thermal Systems: A Review. Part 2. Integration As Passive System, Dervilla Niall, Sarah Mccormack, Philip Griffiths, Luisa Cabeza, Lidia Navarro, Albert Castell, Alvaro De Grazia, Maria Brown
Articles
Energy consumption trends in residential and commercial buildings show a significant increase in recent decades. One of the key points for reducing energy consumption in buildings is to decrease the energy demand. Buildings envelopes are not just a structure they also provide protection from outdoor weather conditions always taking into account the local climate. Thermal energy storage has been used and applied to the building structure by taking advantage of sensible heat storage of materials with high thermal mass. But in recent years, researchers have focused their studies on the implementation of latent heat storage materials that if well incorporated …
Chemically Stabilized Soft Clays For Road-Base Construction, Xin Kang, Gi Chun Kang, Kuang Tsung Chang, Louis Ge
Chemically Stabilized Soft Clays For Road-Base Construction, Xin Kang, Gi Chun Kang, Kuang Tsung Chang, Louis Ge
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Soft clays are widely distributed in Missouri, United States. Due to their relatively low strength and high compressibility, subgrade construction in soft clays has encountered many difficulties. In recent practice, the use of fly ash (FA) along with lime to tackle soft subgrade problems has shown promising results. The effectiveness of Class C FA and lime kiln dust (LKD) in clay subgrade stabilization is examined in this research. Scanning electron microscopic (SEM) analysis, proctor compaction tests, unconfined compression tests, and resilient modulus tests were carried out on the FA and LKD modified soil mixtures. Test specimens were prepared at optimum …
Measuring The Influence That Components Have On Pedestrian Route Choice In Activated Alleys, Samuel Hirsher Gross
Measuring The Influence That Components Have On Pedestrian Route Choice In Activated Alleys, Samuel Hirsher Gross
Master's Theses
This paper explores how cities have integrated formal planning into improving public space. Through a review of literature on the topic, this the paper identifies the potential design has to renovate narrow streets and alleys, within the public right of way. By preforming an assessment of plans and programs, this paper identifies the common themes or components that have been used by planners, architects, and engineers to improve the urban environment for pedestrians. Based on this information, a pilot study was created to measure the influence the most common components have on pedestrian route choice. The results are then compared …
Impact Of Modified Inlets On Residence Times In Baffled Tanks, Jeremy S. Carlston, Subhas Karan Venayagamoorthy
Impact Of Modified Inlets On Residence Times In Baffled Tanks, Jeremy S. Carlston, Subhas Karan Venayagamoorthy
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Sharp inlets, although prevalent, tend to reduce mixing efficiency in hydraulic contact tanks by affecting fluid and scalar transport throughout the entire system. Superior inlets are often not an option because of the prohibitive cost of upgrading preexisting tanks. To remedy this, seven inexpensive yet easily implemented attachments to a sharp inlet were tested on a full-scale, baffled, prototypical contact tank. Cumulative residence time distributions of a conservative, passive scalar were obtained for each attachment to assess their performance. A study using computational fluid dynamics of the same tank with the various attachments was then performed to strengthen the empirical …
Using Archived Transit Data To Analyze The Effect Of Rainfall On Transit Performance Measures At The Route Level, Nicholas F. Bleich
Using Archived Transit Data To Analyze The Effect Of Rainfall On Transit Performance Measures At The Route Level, Nicholas F. Bleich
Master's Theses
This study investigates the effect of rainfall on transit performance measures at the route level in the Puget Sound region of Washington State. Transit agencies are required to report certain performance metrics to the Federal Transit Administration (FTA), but performance measures can also be used to evaluate service and provide customers with information regarding the transit system. Using a three-year sample of archived automatic vehicle location (AVL) and hydrologic data the relationships between ridership, travel time, delay, and rainfall were investigated. The analysis of daily ridership and rainfall resulted in no statistically significant results, however, the results are supported by …
Recent Advances In Indoor Chemistry, Glenn Morrison
Recent Advances In Indoor Chemistry, Glenn Morrison
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Just as the chemistry creates urban smog and aerosols that influence climate change, chemistry in building air can alter the indoor environment for better or worse. This review focuses on chemical pathways initiated by oxidants that infiltrate from outdoor air and other indoor-sourced reactants and surfaces that make these environments unique chemical reactors. Ozone reacts with fragrance molecules, tobacco smoke residues, and even human skin oils to generate a host of oxidized organic compounds, secondary organic aerosols, and irritants. Nitrous acid is formed on indoor surfaces and is subsequently cleaved by even the relatively dim light indoor. This raises the …
Planning And Design For Hurricane Protection With Sea Level Rise, Bob Ivarson
Planning And Design For Hurricane Protection With Sea Level Rise, Bob Ivarson
May 22, 2015: Megaproject Protective Structures for Hampton Roads
No abstract provided.
A Guide For Planning A Bike Share System At The University Of Nebraska–Lincoln, Wade M. Schuldt
A Guide For Planning A Bike Share System At The University Of Nebraska–Lincoln, Wade M. Schuldt
Community and Regional Planning Program: Theses
The purpose of this document is to serve as a framework for planning a bicycle share system at the University of Nebraska-Lincoln, with the possible inclusion of the City of Lincoln, Nebraska, in the system. This document provides a background review of the evolution of bike share systems and the recent rapid growth of these systems around the world. The document describes planning methodologies used in other locations and the lessons learned from the bike share systems around the world, as to what processes should be pursued to implement a successful bike share system. With the University of Nebraska-Lincoln move …
Assessing Gait And Postural Stability Of Construction Workers Using Wearable Wireless Sensor Networks, Houtan Jebelli
Assessing Gait And Postural Stability Of Construction Workers Using Wearable Wireless Sensor Networks, Houtan Jebelli
Department of Construction Engineering and Management: Dissertations, Theses, and Student Research
Falling accidents are a leading cause of fatal and nonfatal injuries in the construction industry. This fact demonstrates the need for a comprehensive fall-risk analysis that incorporates the effects of construction workers’ physiological characteristics. In this context, the objective of the thesis is to investigate and validate the usefulness of the gait- and postural-stability metrics in assessing construction workers’ fall risks. Diverse metrics that assess the capability to keep the body balanced and maintain coordination of body segments during locomotion (gait stability) and stationary postures (postural stability) have been introduced and used in clinical applications. However, their usefulness in the …
Probabilistic Precipitation Estimation With A Satellite Product, Nir Y. Krakauer, Soni M. Pradhanang, Jeeban Panthi, Tarendra Lakhankar, Ajay K. Jha
Probabilistic Precipitation Estimation With A Satellite Product, Nir Y. Krakauer, Soni M. Pradhanang, Jeeban Panthi, Tarendra Lakhankar, Ajay K. Jha
Publications and Research
Satellite-based precipitation products have been shown to represent precipitation well over Nepal at monthly resolution, compared to ground-based stations. Here, we extend our analysis to the daily and subdaily timescales, which are relevant for mapping the hazards caused by storms as well as drought. We compared the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) 3B42RT product with individual stations and with the gridded APHRODITE product to evaluate its ability to retrieve different precipitation intensities. We find that 3B42RT, which is freely available in near real time, has reasonable correspondence with ground-based precipitation products on a daily timescale; rank …
On Turbulent Mixing In Stably Stratified Wall-Bounded Flows, Farid Karimpour, Subhas Karan Venayagamoorthy
On Turbulent Mixing In Stably Stratified Wall-Bounded Flows, Farid Karimpour, Subhas Karan Venayagamoorthy
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In this paper, we provide an analysis of turbulent mixing in stably stratified wall-bounded flows to highlight a number of important issues such as prediction of the turbulent viscosity, the turbulent diffusivity, and the irreversible flux Richardson number. By invoking the equilibrium assumption between the production rate of the turbulent kinetic energy (P), the dissipation rate of the turbulent kinetic energy (P), and the turbulent potential energy dissipation rate (εPE) as P ≈ ε + εPE and also assuming equilibrium between the buoyancy flux (B) and εPE as -B ≈ εPE, we first propose that the irreversible flux Richardson number …
Low Income, Supermarket Accessibility, And The Transportation Network: A Multimodal Analysis Identifying Areas Of Poor Accessibility And Intervention Strategies In Indianapolis, Indiana, Andrea Leigh Bailey
Low Income, Supermarket Accessibility, And The Transportation Network: A Multimodal Analysis Identifying Areas Of Poor Accessibility And Intervention Strategies In Indianapolis, Indiana, Andrea Leigh Bailey
Open Access Theses
The United States Department of Agriculture (USDA) Economic Research Service estimates that 23.5 million people live in food deserts, over half of which are considered low-income residents. Accurately defining a food desert is crucial as the designated areas can benefit from grant opportunities and funding priority. To qualify as an urban food desert, the USDA requires that at least 500 residents or one-third of the population live outside a one-mile buffer from a supermarket as well as have a median income of less than 80% of the area average or a poverty rate of greater than 20%. Approaches in the …
Modeling Person-To-Person Contaminant Transport In Enclosed Environments, Chun Chen
Modeling Person-To-Person Contaminant Transport In Enclosed Environments, Chun Chen
Open Access Dissertations
It is essential to predict person-to-person contaminant transport in enclosed environments to improve air distribution design and reduce the infection risk from airborne infectious diseases. This study aims to improve and accelerate the simulation of person-to-person contaminant transport in enclosed environments. ^ This investigation first conducted experimental measurements of person-to-person contaminant transport in an office mockup and the first-class cabin of a functional MD-82 aircraft. The experimental data of steady-state airflow, temperature, and gas contaminant concentration fields obtained in the office were used to validate the steady-state computational fluid dynamics (CFD) models. In the aircraft cabin, the transient particle concentrations …