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

Architecture Commons™

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

Civil and Environmental Engineering

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1591 - 1620 of 2169

Full-Text Articles in Architecture

Quantification Of Steroid Sex Hormones Using Solid-Phase Extraction Followed By Liquid Chromatography-Mass Spectrometry, Youssef Filali-Meknassi, Muriel Auriol, Craig D. Adams, Rao Y. Surampalli Jan 2007

Quantification Of Steroid Sex Hormones Using Solid-Phase Extraction Followed By Liquid Chromatography-Mass Spectrometry, Youssef Filali-Meknassi, Muriel Auriol, Craig D. Adams, Rao Y. Surampalli

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this study, the occurrence of trace amounts of natural and synthetic steroid estrogens in the aquatic environment was studied using liquid chromatography coupled with electrospray mass spectrometry, following solid-phase extraction (SPE). the SPE was performed with C18 and NH2 cartridges. the first objective was to develop a reliable method for analyzing steroid estrogens (resulting from human and animal excretions) in different matrices. the method developed was then applied to quantify the occurrence of natural and synthetic hormones (estrone [E1], 17β-estradiol [βE2], 17α-estradiol [αE2], estriol [E3], and 17α-ethinylestradiol [EE2]) in environmental samples in surface water and wastewater treatment plant (WWTP) …


Soil Suction And Behavior Of Chemically Treated Clays, Thomas M. Petry, Cheng Ping Jiang Jan 2007

Soil Suction And Behavior Of Chemically Treated Clays, Thomas M. Petry, Cheng Ping Jiang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Expansive clay soils have caused significant damage throughout the world. Chemical stabilizing agents have been used to reduce the swell of expansive clay soils, but the effect of chemical treatment on the matric and osmotic suction of soils has not been investigated previously. Two subject soils were chosen to study soil suction and the behavior of chemically treated clay. One soil, with high swell potential, was from Irving, Texas. the other soil, with moderate swell potential, was from Slater, Missouri. Hydrated lime and KIS (a proprietary solution containing potash and ammonium lignosulfonate) were used as chemical stabilizers. Select physical and …


Evaluation Of Time Independent Rheological Models Applicable To Fresh Self-Compacting Concrete, Dimitri Feys, Ronny Verhoeven, Geert De Schutter Jan 2007

Evaluation Of Time Independent Rheological Models Applicable To Fresh Self-Compacting Concrete, Dimitri Feys, Ronny Verhoeven, Geert De Schutter

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Self-Compacting Concrete is a New Type of Concrete Which is More Liquid Compared to Traditional Concrete and Which Does Not Need Any Form of External Compaction. as a Result, This Type of Concrete is Suitable for a New Placing Technique: Pumping SCC from the Bottom in the Formwork and Letting It Rise in the Formwork Due to the Applied Pressure. in Order to Understand the Phenomena Occurring during Pumping Operations, the Rheological Properties of SCC Must Be Investigated and Controlled. Tests Have Been Performed with Two Different Rheometers, Which Are Described in This Paper. for the Tattersall MIk-II Rheometer, a …


The Use Of Thermoelectric Peltiers To Recapture Waste Heat, Navarre Bartz Jan 2007

The Use Of Thermoelectric Peltiers To Recapture Waste Heat, Navarre Bartz

Opportunities for Undergraduate Research Experience Program (OURE)

Peltier devices are a method of converting differences in temperature into electrical energy. Using data from a supplier of these devices, calculations were made to determine the efficiency of these devices in conjunction with a residential solar hybrid electric system. The initial calculations show efficiencies less than 2% with the temperature differences experienced during the springtime. While this efficiency doesn't sound stellar, taking into account the current efficiency of residential solar cells, this would be an appreciable addition to the power output of a residential solar system.


Durability Performance Of Polyurea Confined Concrete Cylinders, Matthew Beyer Jan 2007

Durability Performance Of Polyurea Confined Concrete Cylinders, Matthew Beyer

Opportunities for Undergraduate Research Experience Program (OURE)

No abstract provided.


Analysis Of Vertical Takeoff And Landing (Vtol) Unmanned Aerial Vehicles (Ua V) With Emphasis On Tilt Duct And Tilt Rotor Systems, Devin Boyle Jan 2007

Analysis Of Vertical Takeoff And Landing (Vtol) Unmanned Aerial Vehicles (Ua V) With Emphasis On Tilt Duct And Tilt Rotor Systems, Devin Boyle

Opportunities for Undergraduate Research Experience Program (OURE)

No abstract provided.


Design Of Concrete Railing Reinforced With Glass Fiber Reinforced Polymer Bars, Fabio Matta, Antonio Nanni Dec 2006

Design Of Concrete Railing Reinforced With Glass Fiber Reinforced Polymer Bars, Fabio Matta, Antonio Nanni

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The use of Fiber Reinforced Polymer (FRP) reinforcement is a practical alternative to conventional steel rebars in concrete structures subjected to aggressive environments. the solution is attractive for bridge deck and rail applications, as it eliminates corrosion of the steel reinforcement, which is the major instrument of degradation. Due to the peculiar physical and mechanical characteristics of advanced composite materials, the design philosophy of FRP reinforced concrete (RC) structures differs from that of traditional RC. This paper introduces a systematic approach adopted for the structural and functional design of an open-post bridge railing reinforced with Glass FRP bars (GFRP) as …


Dynamic And Economic Design Of Rigid Retaining Wall, Y. Wu, Shamsher Prakash, V. K. Puri Dec 2006

Dynamic And Economic Design Of Rigid Retaining Wall, Y. Wu, Shamsher Prakash, V. K. Puri

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A 2-D model which accounts for the effect of coupled sliding and rocking motion and uses strain dependent soil stiffness and material damping for calculating the response of rigid retaining walls subjected to dynamic loads, was developed earlier. This model was used to study the effect inclination of the wall face in contact with the backfill, on its displacement under the effect of ground motions due to Northridge, ElCentro and Loma Prieta earthquakes. the effect of wall inclination on cumulative displacements is discussed and its role in achieving possible cost effectiveness in design of rigid retaining wall is highlighted. Copyright …


Remote Health Monitoring Of The First Smart Bridge In Florida, Ebrahim Mehrani, Ashraf Salah Eldin Ayoub Dec 2006

Remote Health Monitoring Of The First Smart Bridge In Florida, Ebrahim Mehrani, Ashraf Salah Eldin Ayoub

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Monitoring of civil engineering structures is a new area that has gained significant attention recently and became a topic of extreme national interest. This area is being driven by the need to develop efficient condition assessment procedures for structural performance in response to societal and economic needs. the main goal of monitoring is to detect accurately and efficiently structural damage either due to long-term deterioration processes or due to extreme events (e.g. earthquakes, blasts). with the emergence of new technologies, structures can now be monitored remotely from a central monitoring station located several miles away from the field. Sensors are …


Softened Truss Model For Rc Torsional Members Under Combined Action, Gary Greene, Abdeldjelil Belarbi Dec 2006

Softened Truss Model For Rc Torsional Members Under Combined Action, Gary Greene, Abdeldjelil Belarbi

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.


Collapse Assessment Of Degrading Mdof Structures Under Seismic Excitations, Mouchir Chenouda, Ashraf Salah Eldin Ayoub Dec 2006

Collapse Assessment Of Degrading Mdof Structures Under Seismic Excitations, Mouchir Chenouda, Ashraf Salah Eldin Ayoub

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Seismic code provisions are now adopting performance-Based methodologies, where structures are designed to satisfy multiple performance objectives. Most codes rely on approximate methods to predict the desired seismic demand parameters. Most of these methods are based on simple SDOF models, and do not take into account neither MDOF nor degradation effects, which are major factors influencing structural behavior under earthquake excitations. More importantly, most of these models can not predict collapse explicitly under severe seismic loads. This study presents a newly developed model that incorporates degradation effects into seismic analysis of MDOF structures. a new energy-Based approach is used to …


Bs News Dec 2006

Bs News

Building Services Engineering

No abstract provided.


Bs News Nov 2006

Bs News

Building Services Engineering

No abstract provided.


Lagrangian Mixing In Decaying Stably Stratified Turbulence, Subhas K. Venayagamoorthy, Derek D. Stretch Oct 2006

Lagrangian Mixing In Decaying Stably Stratified Turbulence, Subhas K. Venayagamoorthy, Derek D. Stretch

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Direct numerical simulations are used to study mixing and dispersion in decaying stably stratified turbulence from a Lagrangian perspective. The change in density of fluid particles owing to small-scale mixing is extracted from the simulations to provide insight into the mixing process. These changes are driven by temporally and spatially intermittent events that are strongly suppressed as the stratification increases and overturning motions disappear. This occurs for times Nt > 2π i.e. after one buoyancy period, where N is the buoyancy frequency. The role of small-scale mixing processes in the density (or buoyancy) flux is analyzed. After an initial transient, we …


Bs News Oct 2006

Bs News

Building Services Engineering

No abstract provided.


Bs News Sep 2006

Bs News

Building Services Engineering

No abstract provided.


Design Of Window Glass For Lateral Pressures, Joseph E. Minor, H. Scott Norville Aug 2006

Design Of Window Glass For Lateral Pressures, Joseph E. Minor, H. Scott Norville

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

ASTM Standard E 1300-04 ("Standard practice for determining load resistance of glass in buildings") outlines procedures for determining the strength of window glass products when the glass is subjected to uniform lateral pressure. This standard practice addresses each of the commonly used window glass products (monolithic glass, laminated glass, and insulating glass) that are fabricated from annealed, heat strengthened, and fully tempered glass plates, used singly or in combination. the procedures are based on principles of structural mechanics, are thorough, and are presented in clear and concise terms. Analyses of the basis for and the scope of these procedures lead …


Mansfield Ct: Planning A New Village Center, Maggie Jones, Richard Barringer Aug 2006

Mansfield Ct: Planning A New Village Center, Maggie Jones, Richard Barringer

Planning

The case follows the development of a plan for a new village center in Storrs, the central village of Mansfield, Connecticut. A process that was transparent and inclusive of the community members yielded a plan that gained the approval of the Town, the landowner (the University of Connecticut), and the citizenry. The process relied on the mending of fences, the leadership of key participants, and an innovative strategy that included development of a nonprofit corporation and creative use of grant money. While zoning changes are still in the works, the first stage of building goes forward.


South Kingstown Ri: New Zoning For An Historic Mill, Maggie Jones, Richard Barringer Aug 2006

South Kingstown Ri: New Zoning For An Historic Mill, Maggie Jones, Richard Barringer

Planning

The village of Peace Dale in the town of South Kingstown, Rhode Island, developed around several mills that commenced operations in the 1800s. One mill, known as the Palisades, is still partially active and in excellent condition, but much of its square footage is unutilized. A citizens’ group of artists and business people joined with the mill owners and the town of South Kingstown to develop new zoning regulations to make more flexible the permitted uses for the mill site. The proposed zoning will allow the mill complex to feature a mix of retail, residential, and manufacturing uses, while preserving …


Augusta Me: The New Bridge Begets A New Planned Neighborhood, Molly Pulsifer, Richard Barringer Aug 2006

Augusta Me: The New Bridge Begets A New Planned Neighborhood, Molly Pulsifer, Richard Barringer

Planning

Construction of a new Third Bridge over the Kennebec River in Augusta offered the prospect of a new and handsome gateway to the city. Further, the resulting change in traffic patterns offered the City the chance to plan for a pattern of development quite different from what the city had experienced for the past half-century. The case study describes the planning and construction of the new bridge and corridors that re-routed traffic out of Augusta’s downtown and older neighborhoods, and created the opportunity for planned development adjacent to the corridor created by the new bridge. It goes on to describe …


Changing Maine, 1960-2010: Teaching Guide, Richard Barringer, New England Environmental Finance Center Jul 2006

Changing Maine, 1960-2010: Teaching Guide, Richard Barringer, New England Environmental Finance Center

Maine History & Policy Development

Unlike forty years ago, none of us is now certain what the future holds for Maine – except that it will be different. Maine has been transformed by the events of the recent decades. We have come into a new world, a new time – a new historical era, if you will. This new era, like previous eras in Maine history, will require of us new ways of thinking, new ways of understanding, new ways of organizing ourselves as a community of people, if the values and culture we share and cherish are to endure and flourish.


Bs News Jul 2006

Bs News

Building Services Engineering

No abstract provided.


Bs News Jun 2006

Bs News

Building Services Engineering

No abstract provided.


Bs News May 2006

Bs News

Building Services Engineering

No abstract provided.


Bs News Apr 2006

Bs News

Building Services Engineering

No abstract provided.


Bs News Mar 2006

Bs News

Building Services Engineering

No abstract provided.


Bs News Feb 2006

Bs News

Building Services Engineering

No abstract provided.


Trees And Ice Storms: The Development Of Ice Storm–Resistant Urban Tree Populations (Second Edition), Richard J. Hauer, Jeffrey O. Dawson, Les P. Werner Jan 2006

Trees And Ice Storms: The Development Of Ice Storm–Resistant Urban Tree Populations (Second Edition), Richard J. Hauer, Jeffrey O. Dawson, Les P. Werner

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Severe ice storms occur every year in the United States and Canada, particularly in the midwestern and eastern regions of the United States. Along with fires and wind, ice storms are a frequent and major natural disturbance factor in eastern deciduous forests. Likewise ice storms are responsible for deaths and injuries of people and cause dramatic damage and tree loss to urban forests. Ice storms annually result in millions of dollars in loss, and potentially billions of dollars in losses for extreme and widespread ice storms. Damage to electric distribution systems, blocked roadways, and property damage from fallen trees and …


Effect Of Seeding Materials And Mixing Strength On Struvite Precipitation, Jun Wang, Joel Gerard Burken, Xiaoqi Zhang Jan 2006

Effect Of Seeding Materials And Mixing Strength On Struvite Precipitation, Jun Wang, Joel Gerard Burken, Xiaoqi Zhang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Struvite Precipitation Has Increasing Interest as a Technology for Removing and Recovering Phosphorus from Wastewater Streams. Many Chemical Factors Have Been Studied, Such as Optimum PH Values and Component-Ion Molar Ratios, Yet, Understanding of Physical Aspects is Lacking. Two Physical Parameters Were Tested: (1) Seeding Material Addition and (2) Mixing. Objectives Were to Evaluate Three Seeding Materials and to Optimize Mixing Conditions for Struvite-Crystal Precipitation, Growth, and Subsequent Sedimentation. Results Confirm that Mixing Strength and Proper Seeding Materials Increase Crystal Size and Improve Settleability. for Unseeded Solutions, Optimum Phosphorus Removal Was Achieved at a Mixing Strength of G = 76 …


Numerical Simulations Of The Interaction Of Internal Waves With A Shelf Break, S. K. Venayagamoorthy, O. B. Fringer Jan 2006

Numerical Simulations Of The Interaction Of Internal Waves With A Shelf Break, S. K. Venayagamoorthy, O. B. Fringer

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The energetics of the interaction of internal gravity waves with a shelf break is investigated by means of high-resolution two-dimensional numerical simulations, with an emphasis on understanding the partitioning of the internal wave energy over the course of the interaction process and the subsequent dynamics of the onshore propagating internal waves. Some of the energy is dissipated as a result of the instabilities associated with breaking, while the remaining energy is either reflected back away from or transmitted onto the shelf. We employ an analysis of the distribution of the energy flux across the shelf break taking into account the …