Open Access. Powered by Scholars. Published by Universities.®

Civil and Environmental Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

2013

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 901 - 930 of 1513

Full-Text Articles in Civil and Environmental Engineering

Finishing The Job: A Partnership For Diversity In The Construction Workforce, Susan Moir, Liz Skidmore, Janet Jones, Brian Doherty Apr 2013

Finishing The Job: A Partnership For Diversity In The Construction Workforce, Susan Moir, Liz Skidmore, Janet Jones, Brian Doherty

Office of Community Partnerships Posters

The Policy Group on Tradeswomen’s Issues (PGTI) is a regional collaboration of construction industry stakeholders working together since 2008 to tackle the persistent failure of policies enacted to open up good paying jobs in the construction trades to women. Our focus on women explicitly supports efforts to increase all forms of diversity in the construction industry. Following the publication of our 2011 founding document, Unfinished Business: Building Equality for Women in the Construction Trades, PGTI has focused on the development and implementation of best practices for a diverse construction workforce in public and non-profit construction.

Go to article

The Application Of Cobie To Increase The Functionality Of Existing Software, Barry Mcauley, Alan V. Hore, Mark Mccormack Apr 2013

The Application Of Cobie To Increase The Functionality Of Existing Software, Barry Mcauley, Alan V. Hore, Mark Mccormack

Conference papers

Building Information Modelling (BIM) can provide a focus on collaboration between the designers, constructors and facility management (FM) personnel leading to major efficiencies in the operational and maintenance phase of a building. The information within a model can be extracted at various stages throughout the project life cycle using the Construction-Operation Building Information Exchange (COBie) schema that provides an open framework for the exchange and delivery of construction handover information. However, it is then up to the FM software companies to take the information and display it in a user friendly way. The authors have set about enhancing an established …

Go to article

Estimating The Wind Resource In An Urban Area: A Case Study Of Micro Wind Generation Potential In Dublin, Ireland, Keith Sunderland, Gerald Mills, Michael Conlon Apr 2013

Estimating The Wind Resource In An Urban Area: A Case Study Of Micro Wind Generation Potential In Dublin, Ireland, Keith Sunderland, Gerald Mills, Michael Conlon

Articles

The micro-turbine wind market in cities faces significant challenges due to the complexities associated with the urban terrain but, if a renewable solution to increasing energy demand is to be achieved, energy conversion systems where populations are concentrated, that is cities, must be considered. This research evaluates the urban wind resource by employing a physically-based empirical model to link wind observations at a conventional meteorological site to those acquired at urban sites. The approach is based on urban climate research that has examined the effects of varying surface roughness on the wind-field between and above buildings. Here, this is applied …

Go to article

Control Charts As A Productivity Improvement Tool In Construction, Jospeh Hubert Ault Apr 2013

Control Charts As A Productivity Improvement Tool In Construction, Jospeh Hubert Ault

Purdue Polytechnic Masters Theses

This study examined the use of individuals control charts to facilitate the productivity improvement of repetitive construction processes. Cycles times for excavation, forming, and reinforcing processes were observed using stratified random sampling during the construction of six residential home foundations. The cycle time information was plotted on control charts followed by an intervention, with the applicable crew members and management, to analyze the charts and propose solutions to any problems identified. Following the intervention, more samples were collected for comparison to the baseline observations collected before the intervention. The mean cycle times were compared before and after the interventions using …

Go to article

North American Standard For Cold-Formed Steel Framing -- General Provisions, 2012 Edition, American Iron And Steel Institute Apr 2013

North American Standard For Cold-Formed Steel Framing -- General Provisions, 2012 Edition, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Go to article

North American Standard For Cold-Formed Steel Framing -- Product Data, 2012 Edition, American Iron And Steel Institute Apr 2013

North American Standard For Cold-Formed Steel Framing -- Product Data, 2012 Edition, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Go to article

North American Standard For Cold-Formed Steel Framing -- Truss Design, 2012 Edition, American Iron And Steel Institute Apr 2013

North American Standard For Cold-Formed Steel Framing -- Truss Design, 2012 Edition, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Go to article

Water Policy, Planning And Governance - University Of Central Florida, Kaveh Madani Apr 2013

Water Policy, Planning And Governance - University Of Central Florida, Kaveh Madani

All ECSTATIC Materials

Water Resources Policy, Planning and Governance deals with political, social, economic and administrative systems that affect the use, development, planning, and management of water resources at different levels. Course taught at University of Central Florida.

Go to article

El Agua En Granada / Water In Granada, Spencer Lacy Apr 2013

El Agua En Granada / Water In Granada, Spencer Lacy

Spain: Language, Community, and Social Change

I am a junior in college studying civil engineering with a focus in water resources at the University of Colorado at Boulder. My entire life I have been surrounded with water and rivers. I began kayaking as a toddler in the Colorado rivers and have spent a large part of my life living, playing, exercising, and working in rivers. My grandfather is a civil engineer who owns a water resource company, my father is a civil engineer who designs whitewater kayak courses all over the world, and my older brother recently graduated from CU after studying civil engineering and is …

Go to article

Runoff Of Silvicultural Herbicides Applied Using Best Management Practices, Matthew W. Mcbroom, Jeff Louch, R Scott Beasley, Mingteh Chang, George G. Ice Apr 2013

Runoff Of Silvicultural Herbicides Applied Using Best Management Practices, Matthew W. Mcbroom, Jeff Louch, R Scott Beasley, Mingteh Chang, George G. Ice

Faculty Publications

Nine small (2.2 to 2.9 ha) and four large (70 to 135 ha) watersheds in East Texas, USA, were instrumented to compare herbicide runoff under different silvicultural systems with best management practices (BMPs). Two treatments were evaluated: conventional, with clearcutting, aerial herbicide site preparation, and hand-applied banded herbaceous release; and intensive, in which subsoiling, aerial fertilization, and a second-year aerial herbicide application were added. Herbicides were applied as operational tank mixes. The highest imazapyr concentration found in stream water was 39 mg L‑1 during the first storm after application (23 days after treatment, DAT) and in-stream concentrations …

Go to article

Development, Deployment, And Assessment Of A New Educational Paradigm For Transportation Professionals And University Students, Christopher M. Monsere Apr 2013

Development, Deployment, And Assessment Of A New Educational Paradigm For Transportation Professionals And University Students, Christopher M. Monsere

TREC Final Reports

Traditionally, engineering coursework has been delivered in a lecture-based format with accompanying exercises assigned for time outside of class. The activity-based approach to learning aims to keep students engaged in and responsible for their own learning processes. This approach has been shown to be more effective than conventional teaching approaches in terms of long-term retention of the educational material.

Go to article

An Automated Approach To Dynamic Site Layout Planning, Duy Huu Nguyen Apr 2013

An Automated Approach To Dynamic Site Layout Planning, Duy Huu Nguyen

Masters Theses

Dynamic site layout planning involves determining the optimum location of resources on the construction site. Site layouts are considered dynamic because construction activities and the number and nature of associated resources change as the project progresses. Previous research has focused on the use of several algorithms to address dynamic site layout problems. These efforts do not enable automated tracking of the dynamic context of construction resources, site space and activities. This research presents an automated adaptive component level system capable of generating layouts which are optimized throughout the phases of construction projects. The system involves the integration of building information …

Go to article

Cyber-Adaptive Physical Systems For Automated Construction Progress Monitoring And Asset Tracking, Syed Hammad Rasheed Apr 2013

Cyber-Adaptive Physical Systems For Automated Construction Progress Monitoring And Asset Tracking, Syed Hammad Rasheed

Masters Theses

Despite the benefits of building information models as a means of communication, collaboration and integration in construction projects, their use is often limited to the design and tendering/bidding stage. Potential of building information models lies in its implementation during construction, operations and maintenance phases of a facility’s lifecycle. Tight Integration of building information model and physical facility by means of computational resources is required to achieve this potential such that changes in one environment are automatically reflected in the other. This is termed a cyber-adaptive physical systems approach. This research investigates the applicability of a cyber-adaptive physical systems approach in …

Go to article

Parameters Influencing Pressure During Pumping Of Self-Compacting Concrete, Dimitri Feys, Geert De Schutter, Ronny Verhoeven Apr 2013

Parameters Influencing Pressure During Pumping Of Self-Compacting Concrete, Dimitri Feys, Geert De Schutter, Ronny Verhoeven

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Main Difference between Conventional Vibrated Concrete (CVC) and Self-Compacting Concrete (SCC) is Observed in the Fresh State, as SCC Has a Significantly Lower Yield Stress. on the Other Hand, the Placement of SCC by Means of Pumping is Done with the Same Equipment and Following the Same Practical Guidelines Developed for CVC. It Can Be Questioned Whether the Flow Behavior in Pipes of SCC is Different and Whether the Developed Practical Guidelines Can Still Be Applied. This Paper Describes the Results of Full-Scale Pumping Tests Carried Out on Several SCC Mixtures. It Shows Primarily that the Slump or Yield …

Go to article

Explaining The Hydroclimatic Variability And Change In The Salmon River Basin, Venkataramana Sridhar, Xin Jin, W. Thilini Jaksa Apr 2013

Explaining The Hydroclimatic Variability And Change In The Salmon River Basin, Venkataramana Sridhar, Xin Jin, W. Thilini Jaksa

Civil Engineering Faculty Publications and Presentations

Climate change in the Pacific Northwest and in particular, the Salmon River Basin (SRB), is expected to bring about 3–5 °C rise in temperatures and an 8 % increase in precipitation. In order to assess the impacts due to these changes at the basin scale, this study employed an improved version of Variable Infiltration Capacity (VIC) model, which includes a parallel version of VIC combined with a comprehensive parameter estimation technique, Shuffled Complex Evolution (SCE) to estimate the streamflow and other water balance components. Our calibration (1955–1975) and validation (1976–1999) of the model at the outlet of the basin, White …

Go to article

Assessment Of Surface Energy Balance In Southern Idaho, Beda Luitel Apr 2013

Assessment Of Surface Energy Balance In Southern Idaho, Beda Luitel

McNair Scholars Research Journal

Proper management of water resources is always a matter of concern in arid regions like southern Idaho such as the Snake River basin where rainfall is limited and the moisture level of atmospheric air is below threshold level most of the time throughout a year. For the proper assessment of water resources it is necessary to quantify the Evapotranspiration (ET) loss in this region and use the available water resources efficiently. A vast quantity of water is moving in the atmosphere under the direct influence of solar energy. So, in order to characterize the behavior of the water cycle, it …

Go to article

Special Section On Natural Treatment Systems: More Than Just A Solution To Pollution, Joel Gerard Burken Apr 2013

Special Section On Natural Treatment Systems: More Than Just A Solution To Pollution, Joel Gerard Burken

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

Go to article

Sensitivity Analysis Of A Proposed Model For Removal Efficiency Of Trihalomethanes (Thms) Using Spray Aeration, Aidan Cecchetti Apr 2013

Sensitivity Analysis Of A Proposed Model For Removal Efficiency Of Trihalomethanes (Thms) Using Spray Aeration, Aidan Cecchetti

Honors Theses and Capstones

Trihalomethanes (THMs) form in drinking water treatment systems as a byproduct of chlorination and are problematic from a public health perspective due to their carcinogenic potential and their potential for additional formation throughout distribution systems. Recently, regulations have tightened on THMs in an attempt to reduce the risk of exposure for consumers at the far ends of distribution systems. Due to widespread use of chlorine and the reluctance of drinking water providers to overhaul current treatment systems, research has been undertaken to investigate post-treatment removal of THMs. One such method is spray aeration, whereby water is recycled in water storage …

Go to article

Analysis Of Shear Lag In Steel Angle Connectors, Benjamin Sawyer Apr 2013

Analysis Of Shear Lag In Steel Angle Connectors, Benjamin Sawyer

Honors Theses and Capstones

Previous research has found an empirically based method for calculating the effective net area defined by stress distributions created by tensile loads in steel connections. Based on the results from that method a theoretical alternative is explored to simplify the process of determining the effective net area.

Go to article

Thermal Performance Analysis Of A Solar Water Heating System With Heat Pipe Evacuated Tube Collector Using Data From A Field Trial, Lacour Ayompe, Aidan Duffy Apr 2013

Thermal Performance Analysis Of A Solar Water Heating System With Heat Pipe Evacuated Tube Collector Using Data From A Field Trial, Lacour Ayompe, Aidan Duffy

Articles

This paper presents an analysis of the thermal performance of a solar water heating system with heat pipe evacuated tube collector using data obtained from a field trial installation over a year in Dublin, Ireland. An automated sub‐system was developed and incorporated to control the hot water draw‐offs and electric immersion heater to mimic the operation of solar water heating systems in domestic dwellings. The maximum recorded collector outlet fluid temperature was 70.3oC while the water temperature at the bottom of the hot water tank was 59.5oC. The annual average daily energy collected was 20.4 MJd …

Go to article

The Role Of Proximity In Reducing Auto Travel: Using Vmt To Identify Key Locations For Development, From Downtown To The Exurbs, Robert B. Case Apr 2013

The Role Of Proximity In Reducing Auto Travel: Using Vmt To Identify Key Locations For Development, From Downtown To The Exurbs, Robert B. Case

Civil & Environmental Engineering Theses & Dissertations

The purpose of this dissertation is to discover the VMT impact of each level of proximity in order to help government identify key locations for housing development, and thereby lower VMT and reduce dependence on foreign oil. By discovering the VMT impact of each level of proximity, this dissertation provides a) the first known means of calculating the proximity-based VMT benefit of subject locations by individual proximity level, and b) the new finding that it is likely that high VMT benefit can be achieved at moderate proximity levels acceptable to many households, enabling representative governments to be politically successful while …

Go to article

Building Upon Common-Pool Resource Theory To Explore Success In Transitioning Water Management Institutions, Christina M. Hoffman Apr 2013

Building Upon Common-Pool Resource Theory To Explore Success In Transitioning Water Management Institutions, Christina M. Hoffman

School of Natural Resources: Dissertations, Theses, and Student Research

Nebraska, like many regions around the world, is faced with the challenge of adapting to a new era in water management. Increasing demands for water resources, mounting concerns over threatened and endangered species, and obligations to abide by interstate water allocation agreements have motivated Nebraska to revisit traditional water management approaches. However, although Nebraska’s water management institutions have undergone much change, little research exists on the influence these changes have had on the ability of water institutions to successfully manage water allocations. This research (1) qualitatively explores the perspectives and experiences of stakeholders in the overappropriated region of the Platte …

Go to article

Performance Of Concrete Incorporating Colloidal Nano-Silica, Mohamed Sabry Zeidan Apr 2013

Performance Of Concrete Incorporating Colloidal Nano-Silica, Mohamed Sabry Zeidan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nanotechnology, as one of the most modern fields of science, has great market potential and economic impact. The need for research in the field of nanotechnology is continuously on the rise. During the last few decades, nanotechnology was developing rapidly into many fields of applied sciences, engineering and industrial applications, especially through studies of physics, chemistry, medicine and fundamental material science. These new developments may be attributed to the fact that material properties and performance can be significantly improved and controlled through nano-scale processes and nano-structures. This research program aims at 1) further understanding the behavior of cementitious materials when …

Go to article

The Impact Of Various Steel Stud Wall Frame Components On Energy Efficiency Analysis – Case Study, Aiyin Jiang, John Dryden Apr 2013

The Impact Of Various Steel Stud Wall Frame Components On Energy Efficiency Analysis – Case Study, Aiyin Jiang, John Dryden

Construction Management Faculty Research and Scholarship

Steel stud framing is an excellent alternative to wood stud framing in residential construction. Steel framing is structurally sound, sustainable, and resistant to mold and insect infestation. However, the use of steel framing in the residential market remains low, due in large part to concerns on the thermal performance of steel. Over the past several years, engineers and constructors have increased the thermal resistance of steel stud walls through various wall assembly improvements, the impact of these components on energy efficiency is unclear. This study applies computer software to simulate the performance of various steel stud wall system assemblies. This …

Go to article

Biodiesel Reactor Design With Glycerol Separation To Increase Biodiesel Production Yield, Budy Rahmat, Imas Siti Setiasih, Roni Kastaman Apr 2013

Biodiesel Reactor Design With Glycerol Separation To Increase Biodiesel Production Yield, Budy Rahmat, Imas Siti Setiasih, Roni Kastaman

Makara Journal of Technology

The study consisted of reactor design used for transesterification process, effect of glycerol separation on transesterification reaction, determination of biodiesel quality, and mass balance analysis. The reactor was designed by integrating circulated pump/stirrer, static mixer, and sprayer that intensify the reaction in the outer tank reactor. The objective was to reduce the use of methanol in excess and to shorten the processing time. The results showed that the reactor that applied the glycerol separation was able to compensate for the decreased use of the reactant methanol from 6:1 to 5:1 molar ratio, and changed the mass balance in the product, …

Go to article

Development Of Seebeck-Coefficient Measurement Systems Using Kelvin-Probe Force Microscopy, Kazutoshi Miwa, Faiz Salleh, Hiroya Ikeda Apr 2013

Development Of Seebeck-Coefficient Measurement Systems Using Kelvin-Probe Force Microscopy, Kazutoshi Miwa, Faiz Salleh, Hiroya Ikeda

Makara Journal of Technology

Thermoelectric device is investigated by a number of researchers in order to enhance the thermoelectric efficiency. It is known that the efficiency can be improved by quantum effect. However, it is difficult to measure the thermoelectric characteristics of nanometer-scale structures. Thus a new measurement method is expected to be developed. We propose to apply Kelvin-probe force microscopy (KFM) to characterization of thermoelectric materials. KFM can locally observe surface potential of Fermi energy of a sample without touching the sample surface. In the present paper, we estimate the Seebeck coefficient of thin Si-on-insulator layers using KFM.

Go to article

Conditional Spectrum Computation Incorporating Multiple Causal Earthquakes And Ground‐Motion Prediction Models, Ting Lin, Stephen C. Harmsen, Jack W. Baker, Nicolas Luco Apr 2013

Conditional Spectrum Computation Incorporating Multiple Causal Earthquakes And Ground‐Motion Prediction Models, Ting Lin, Stephen C. Harmsen, Jack W. Baker, Nicolas Luco

Civil and Environmental Engineering Faculty Research and Publications

The Conditional Spectrum (CS) is a target spectrum (with conditional mean and conditional standard deviation) that links seismic hazard information with ground motion selection for nonlinear dynamic analysis. Probabilistic seismic hazard analysis (PSHA) estimates the ground motion hazard by incorporating the aleatory uncertainties in all earthquake scenarios and resulting ground motions as well as the epistemic uncertainties in ground motion prediction models (GMPMs) and seismic source models. Typical CS calculations to date are produced for a single earthquake scenario using a single GMPM, but more precise use requires consideration of at least multiple causal earthquakes and multiple GMPMs that are …

Go to article

Assessment Procedures For Paved And Gravel Roads, Claudio Figueroa, Bradley Fotsch, Sarah M. Hubbard, John Haddock Apr 2013

Assessment Procedures For Paved And Gravel Roads, Claudio Figueroa, Bradley Fotsch, Sarah M. Hubbard, John Haddock

Indiana Local Technical Assistance Program (LTAP) Publications

The funding available to local agencies in Indiana to manage roadways has decreased in recent years, and many agencies cannot provide adequate maintenance with the available resources. Consequently, agencies are doing everything they can to evaluate the least expensive method to maintain their roads that will meet their objectives and needs. In some cases, the most appropriate surface type is a paved road, and in some cases, it is a gravel road. The decision as to the most appropriate surface type depends on a variety of factors, such as cost, traffic volume, development and public input. The purpose of this …

Go to article

Agricultural Drought Pattern In West Java Using Thermal Vegetation Index From Modis-Terra Satellite, Dini Daruati, Rahmatulloh Rahmatulloh, Sri Hardiyanti Purwadhi Apr 2013

Agricultural Drought Pattern In West Java Using Thermal Vegetation Index From Modis-Terra Satellite, Dini Daruati, Rahmatulloh Rahmatulloh, Sri Hardiyanti Purwadhi

Makara Journal of Technology

This study examines agricultural drought paddy fields in West Java. The aims of this research are to know the pattern and distribution of paddy field drought in West Java and the correlation between drought and the physical characteristics. The agricultural drought is obtained from TVI (Thermal Vegetation Index) model. TVI is derived from MODIS Terra satellite image, which is the ratio between the LST (Land Surface Temperature) and EVI (Enhanced Vegetation Index). Physical factors studied are rainfall, l slope, geomorphology, soil drainage, and irrigation areas. The most severe drought occurred in September 2006 because of El Nino, covering 806,564 ha, …

Go to article

Growth Of Crsi2 Nanostructures Using Crcl2 Powder On Si Substrates, Wen Li, Meng Erchao, Tomoji Matsushita, Shingo Oda, Daisuke Ishikawa, Kaito Nakane, Hirokazu Tatsuoka Apr 2013

Growth Of Crsi2 Nanostructures Using Crcl2 Powder On Si Substrates, Wen Li, Meng Erchao, Tomoji Matsushita, Shingo Oda, Daisuke Ishikawa, Kaito Nakane, Hirokazu Tatsuoka

Makara Journal of Technology

Chromium disilicide (CrSi2) nanostructures were grown by the exposure of Si (111) substrates to CrCl2 vapor in an argon gas flow at atmospheric pressure without using any metal catalyst. Dependence of the growth condition on the structural property was investigated. Hexagonal-shaped CrSi2 microrods were grown at 750 °C with 0.05 g of CrCl2. As the quantity of CrCl2 increased to 0.1 g, the bundle of CrSi2 nanowires with microrods and web-liked CrSi2 nanostructure with turning angles were grown at 750 °C and 700 °C, respectively. The preliminary discussion on the growth mechanism of CrSi2 micro- and nanostructures was carried out.

Go to article

First Prev Next Last