Effect Of Moist Curing And Use Of Lightweight Sand On Characteristics Of High-Performance Concrete,
2013
Missouri University of Science and Technology
Effect Of Moist Curing And Use Of Lightweight Sand On Characteristics Of High-Performance Concrete, Soo Duck Hwang, Kamal H. Khayat, Dalia Youssef
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Factorial design approach was undertaken to determine the effect of initial moist-curing duration (0 and 6 days) on properties of high-performance concrete (HPC) made with different water-to-cementitious materials ratios (w/cm) of 0.30 and 0.40 and sand substitution rates with lightweight sand (LWS) of 0 and 30 %, by volume. Mechanical properties of HPC are shown to be mainly affected by w/cm and total shrinkage of concrete by the LWS replacement rate and initial moist-curing period. It should be noted that concrete made with 30 % LWS replacement that did not receive any moist-curing exhibited lower shrinkage than moist-cured concrete prepared …
Hypervelocity Impact Testing Of Multiwall Targets Using Multiple Simultaneously Launched Projectiles,
2013
Missouri University of Science and Technology
Hypervelocity Impact Testing Of Multiwall Targets Using Multiple Simultaneously Launched Projectiles, William P. Schonberg, Steve Evans, Michael D. Bjorkman
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Multiwall shield designs for spacecraft have been studied extensively in the last four decades as a means of reducing the perforation threat of the near-Earth particulate environment over equivalent single-wall structures. The performance of an impact shield is typically characterized by its ballistic limit equation, which is obtained through high-speed impact tests that typically use spherical projectiles fired in light gas guns. Traditional firings employ only one projectile per launch package. However, some facilities have taken to launching multiple projectiles of different sizes in a single launch package. In light of the significant role played by a ballistic limit equation …
Extension Of The Reiner-Riwlin Equation To Determine Modified Bingham Parameters Measured In Coaxial Cylinders Rheometers,
2013
Missouri University of Science and Technology
Extension Of The Reiner-Riwlin Equation To Determine Modified Bingham Parameters Measured In Coaxial Cylinders Rheometers, Dimitri Feys, Jon E. Wallevik, Ammar Yahia, Kamal H. Khayat, Olafur H. Wallevik
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The Determination of the Exact Rheological Properties, in Fundamental Units, of Cementitious Materials Has Become Gradually a Necessary Step in the Domain of Concrete Science. Several Types of Rheometers and their Corresponding Transformation Equations Are Described in the Literature. in This Paper, the Reiner-Riwlin Transformation Equation, Valid for Coaxial Cylinders Rheometers, is Developed for the Modified Bingham Model, which is an Extension of the Bingham Model with a Second Order Term in the Shear Rate. the Established Transformation is Shown to Be Compatible with the Reiner-Riwlin Equation for the Bingham and Herschel-Bulkley Models. its Validation is Further Proven by Means …
Use Of Vacuum For The Stabilization Of Dry Sand Slopes,
2013
Missouri University of Science and Technology
Use Of Vacuum For The Stabilization Of Dry Sand Slopes, B. Bate, Limin Zhang
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Vacuum is proposed as a means for rescuing soil slopes showing signs of impending failure. Two aspects associated with the proposed method were studied: namely, the theory of airflow through dry soils and the effectiveness of vacuum for enhancing the stability of soil slopes. A model test device was developed, and two series of tests were carried out using this device. One was a series of tests on pore-air pressure distributions in dry sand slopes, and the second series involved dry sand slope stability tests. The results revealed that a vacuum (negative pore-air pressure) even as small as 20.4 kPa …
An Experimental Study On Shear Strength Of Chemically-Based Self-Consolidating Concrete,
2013
Missouri University of Science and Technology
An Experimental Study On Shear Strength Of Chemically-Based Self-Consolidating Concrete, Mahdi Arezoumandi, Jeffery S. Volz
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
An experimental investigation was conducted to compare the shear strength of full-scale beams constructed with chemically based, self-consolidating concrete (SCC) with conventional concrete (CC). This experimental program consisted of 16 rectangular beams (12 without shear reinforcing and 4 with shear reinforcing in the form of stirrups), 8 beams for each mix design. Additionally, three different longitudinal reinforcement ratios were evaluated within the test matrix. The beam specimens were tested under a simply supported four-point condition. The experimental shear strengths of the beams were compared with both the shear provisions of selected standards (U.S., Australia, Canada, Europe, and Japan) and a …
Bs News January/February,
2013
Technological University Dublin
Strategic Exploitation Of A Common Resource Under Environmental Risk,
2013
Singapore Management University
Strategic Exploitation Of A Common Resource Under Environmental Risk, Eric Fesselmeyer, Marc Santugini
Research Collection College of Integrative Studies
We study the effect of environmental risk on the extraction of a common resource. Using a dynamic and non-cooperative game in which an environmental event impacts the renewability and the quality of the resource, we show that the anticipation of such an event has an ambiguous effect on extraction and the tragedy of the commons. A risk of a reduction in the renewability induces the agents to extract less today while a risk of a deterioration in the quality has the opposite effect. Moreover, when environmental risk induces conservation, the tragedy of the commons is worsened. (C) 2012 Elsevier B.V. …
The Rebirth Of The Neighborhood,
2013
Georgetown University Law Center
The Rebirth Of The Neighborhood, J. Peter Byrne
Georgetown Law Faculty Publications and Other Works
This essay argues that new urban residents primarily seek a type of community properly called a neighborhood. “Neighborhood” refers to a legible, pedestrian-scale area that has an identity apart from the corporate and bureaucratic structures that dominate the larger society. Such a neighborhood fosters repeated, casual contacts with neighbors and merchants, such as while one pursues Saturday errands or takes children to activities. Dealing with independent local merchants and artisans face-to-face provides a sense of liberation from large power structures, where most such residents work. Having easy access to places of sociability like coffee shops and bars permits spontaneous “meet-ups,” …
Mainstreet Art & Cultural Theater Districts - Clovis & Tucumcari Communities,
2013
University of New Mexico
Mainstreet Art & Cultural Theater Districts - Clovis & Tucumcari Communities, Kelly Gard, Janell Furrow, Cameron Treme, Dale Lusk, Laura Baca, Servando Miranda, Trupti Stellus Pereira, Eliah Guerrero, Daniel Osuna, Kevin Maynard, Justin Depoy, Pete Collins, Stacey George
Design and Planning Assistance Center - Projects
During the spring of 2013 Design Planning Assistance Center (DPAC) of the University of New Mexico's School of Architecture and Planning worked with New Mexico MainStreet to assist Clovis and Tucumcari MainStreet communities and Arts and Cultural District (ACD) initiatives. The work focused on the three historic theaters in Clovis and two in Tucumcari as part of a larger initiative on New Mexico's historic theaters. The studio proposed renovations, adaptive reuses, and additions to the theaters, and proposed both permanent and temporary facilities to create art and cultural theater districts. While these proposals are specific to each theater and community, …
Sustainable Architecture : Addressing The Conditions Of Poverty And Homelessness,
2013
Louisiana State University and Agricultural and Mechanical College
Sustainable Architecture : Addressing The Conditions Of Poverty And Homelessness, Taylor C. Alphonso
LSU Master's Theses
Any large city faces the challenge of addressing homelessness and poverty. The most common action taken to address such conditions is providing temporary shelter accompanied by assistance through welfare programs; these are not permanent solutions. They do not assist the impoverished in establishing themselves in the community as the shelters are temporary, and ignore the fact that many lack the required education along with job and life skills to ultimately establish independence. Many cities do not offer affordable educational opportunities to this demographic, and they tend to overlook the importance the actual facility may have on the encouraging and promoting …
Measuring The Sustainability Of U.S. Public Bicycle Systems,
2012
University of New Orleans
Measuring The Sustainability Of U.S. Public Bicycle Systems, Max W. Williamson
LSU New Orleans Theses and Dissertations
As cities worldwide plan for increasing urbanization levels, new challenges in mobility will arise. Any approach taken to address these new issues will need to consider how to move more people with declining resources, thus the need for a sustainable solution arises. This thesis examines the growing trend of cities creating public bicycle systems as a means to add sustainability to a transportation system and identifies what are the criteria and indicators of a sustainable public bicycle. The criteria and indicators are used to examine data collection techniques of three Public Bicycle Systems in the United States: Capital Bikeshare in …
The Feasibility Of Closing Vehicle Crossings Along St. Charles Avenue: A Study Of Transit Safety And Performance,
2012
University of New Orleans
The Feasibility Of Closing Vehicle Crossings Along St. Charles Avenue: A Study Of Transit Safety And Performance, Vivek B. Shah
LSU New Orleans Theses and Dissertations
The St. Charles streetcar is an important transit line in the city of New Orleans, with about 65,000 people living within a ½ mile walking distance from it. However, the line experiences a very high streetcar/automobile crash rate due in large part to the large number of grade vehicle crossings over the tracks that lack signalization. Through traffic modeling, the closure of many of these vehicle crossings and the diversion of automotive traffic to the remaining, signalized crossings is analyzed to determine traffic impacts on street network. The result is a modest increase in traffic, about 7-8%, at the remaining …
Feasibility Of Reconstructing Decommissioned Urban Schools: Emphasis Private Involvement,
2012
Purdue University
Feasibility Of Reconstructing Decommissioned Urban Schools: Emphasis Private Involvement, George J. Spinaris, Ra
Purdue Polytechnic Masters Theses
Decommissioned urban schools in the United States have become a problem despite well-intentioned efforts of federal, state and local authorities to reconstruct them. The challenge to school districts, superintendants, local and state authorities is threefold – one arising from the education policy and declining student enrollment. The second challenge is due to inadequate funds for maintenance and renovation of existing facilities. The third from the architectural point of view stemming from an architectural and technological modernity to avoid not so much the possibility of urban sprawl but possible clash of community interests. Urban Sprawl is defined as “The unplanned, …
An Experimental Study On Bond Strength Of Reinforcing Steel In High-Volume Fly-Ash Concrete,
2012
Missouri University of Science and Technology
An Experimental Study On Bond Strength Of Reinforcing Steel In High-Volume Fly-Ash Concrete, Trevor J. Looney, Mahdi Arezoumandi, Jeffery S. Volz, John J. Myers
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The production of Portland cement-the key ingredient in concrete-generates a significant amount of carbon dioxide. However, because of its incredible versatility, availability, and relatively low cost, concrete is the most consumed manmade material on the planet. One method of reducing concrete's contribution to greenhouse gas emissions is the use of fly ash to replace a significant amount of the cement. an experimental investigation was conducted to compare the bond strength of reinforcing steel in high-volume fly-ash concrete (HVFAC)-concrete with at least 50 % of the cement replaced with fly ash-with conventional concrete (CC). This study investigated two HVFAC mixes [with …
Cultural Intelligence In Foreign Language Classes,
2012
Indiana State University
Cultural Intelligence In Foreign Language Classes, Daniela Báez
All-Inclusive List of Electronic Theses and Dissertations
No abstract provided.
Behaviors And Perceptions Concerning Online Nutrition Information Among Young Adult Midwest University Students,
2012
Indiana State University
Behaviors And Perceptions Concerning Online Nutrition Information Among Young Adult Midwest University Students, Brenda Moeckly
All-Inclusive List of Electronic Theses and Dissertations
No abstract provided.
Sir Walter Scott And Kenilworth Castle: Ruins Restored By Historical Imagination,
2012
University of Nebraska-Lincoln
Sir Walter Scott And Kenilworth Castle: Ruins Restored By Historical Imagination, Rumiko Handa
Architecture Program: Faculty Scholarly and Creative Activity
This is a study of how the architectural ruins of Kenilworth Castle contributed to the historical imagination of Sir Walter Scott (1771-1832) and how he forged their literary restoration. The castle, located between Warwick and Coventry, was first constructed in the early twelfth century by Geoffrey de Clinton, the royal chamberlain to King Henry I (r. 1100-1135). Major additions were made by King Henry II (r. 1154-1189); King John (r. 1199-1216); John of Gaunt (1340-1399), son of King Edward III and Duke of Lancaster; and Robert Dudley (1532-1588), Earl of Leicester. The castle played a number of important roles throughout …
51/2 | ‘Akko I. The 1991–1998 Excavations: The Crusader-Period Pottery Part 2: Plates,
2012
Israel Antiquities Authority
51/2 | ‘Akko I. The 1991–1998 Excavations: The Crusader-Period Pottery Part 2: Plates, Edna J. Stern
IAA Reports—Monograph Series of the Israel Antiquities Authority
This volume, which comprises two parts: text and plates, is the first of the series documenting the results of the large-scale IAA excavations at ‘Akko during the years 1991–1998. It presents the Crusader-period pottery (12th–13th centuries CE), the largest pottery assemblage of the Latin Kingdom of Jerusalem to be studied from a site in the Levant to date. An important component of this assemblage is the wide variety of imported ceramic wares from regions throughout the western and eastern Mediterranean, some not previously identified in Crusader-period contexts in the Levant. This assemblage is important for the study of trade and …
Watering The Seed: A Model For Change In Jinotepe, Nicaragua And Beyond,
2012
California Polytechnic State University - San Luis Obispo
Watering The Seed: A Model For Change In Jinotepe, Nicaragua And Beyond, Andy Douglas
City and Regional Planning
No abstract provided.
The American Shotgun House: A Study Of Its Evolution And The Enduring Presence Of The Vernacular In American Architecture,
2012
University of Arkansas, Fayetteville
The American Shotgun House: A Study Of Its Evolution And The Enduring Presence Of The Vernacular In American Architecture, Lillian Mcrae
Architecture Undergraduate Honors Theses
This thesis investigates the evolution of the American shotgun house through plans, elevations and photographs to define the formal, architectural differences and similarities between contemporary shotgun houses of the 21st century and the traditional, historic shotgun houses of the late 19th and 20th centuries. More specifically, this study will explore whether or not the once distinct, vernacular shotgun house still exists as a vernacular housing type in its contemporary construction. Part one of the research process reviews the historic past of the shotgun house and determines the characteristics that compose the traditional, vernacular shotgun houses built in the United States …
