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Articles 3901 - 3930 of 4452
Full-Text Articles in Engineering
A New Spectroscopic Method For The Non-Destructive Characterization Of Weathering Damage In Plastics, Andrew Robert George
A New Spectroscopic Method For The Non-Destructive Characterization Of Weathering Damage In Plastics, Andrew Robert George
Theses and Dissertations
The weathering of plastics and composites is a problem because of the loss of both physical and mechanical properties that it causes in these materials. But this weathering effect has been difficult, and in some cases, impossible to characterize without the destruction of the plastic or composite part. Clearly a rapid, reliable, and non-destructive test for the extent of the weathering damage is critically needed. A recent problem that arose at Superyacht Solutions, a boat repair company in Australia, required a solution to just this problem. Such a test was developed for Superyacht Solutions, and is being applied across a …
Numerical Modeling Of Concrete Masonry Walls Strengthened By Fiber Reinforced Polymers Under Lateral Loads, Mohamed Salama
Numerical Modeling Of Concrete Masonry Walls Strengthened By Fiber Reinforced Polymers Under Lateral Loads, Mohamed Salama
Archived Theses and Dissertations
The use of fiber reinforced polymers (FRP) for the seismic retrofit of masonry walls is on the rise. Design formulae are available to estimate the lateral load capacity of the strengthened walls. However, recent experimental data from tests conducted on full scale concrete masonry walls under cyclic lateral loads have shown that these design capacities have not been reached because of the occurrence of other failure modes not accounted for in the design formulae. The limiting failure mode in all test samples referred to in this work was due to premature compression failure of the masonry units at the wall …
Determining The Value Of A Master's Degree In Construction Management, Benjamin K. Davis
Determining The Value Of A Master's Degree In Construction Management, Benjamin K. Davis
Theses and Dissertations
The purpose of this study is to determine the value of a master's degree in construction management in southern Idaho. A telephone and Internet survey was employed to determine the value that members of the construction industry in southern Idaho place on construction management (CM) degrees, both graduate and undergraduate. The survey included 27 self-described general contractors who are members of The Associated General Contractors of America (AGC) in regions 3 and 4 in the state of Idaho. Regions three and four include Twin Falls, Idaho Falls, Pocatello, Ketchum, Burley and surrounding communities. Following the compilation of surveys, it was …
Comparing Time And Accuracy Of Building Information Modeling To On-Screen Takeoff For A Quantity Takeoff Of A Conceptual Estimate, Morgan A. Alder
Comparing Time And Accuracy Of Building Information Modeling To On-Screen Takeoff For A Quantity Takeoff Of A Conceptual Estimate, Morgan A. Alder
Theses and Dissertations
Estimating is a critical aspect of every construction project. The most tedious component of an estimate is the quantity takeoff. Different tools are available to improve an estimator's productivity for a quantity takeoff. Faster quantity takeoffs enable estimator to bid more jobs. This study analyzed the time and accuracy of performing quantity takeoffs when using building information modeling (BIM) through a comparison study using Revit (BIM software) and On-Center's OST. In preparation for the study the researcher conducted a pilot study. Participants of the study were asked to perform a quantity takeoff using both Revit and OST. Their resulting data …
Contractor Variability In Construction Of Cement Treated Base Layers, Maile Anne Rogers
Contractor Variability In Construction Of Cement Treated Base Layers, Maile Anne Rogers
Theses and Dissertations
The primary purposes of this research were to identify construction factors most correlated to specific mechanical properties of cement-treated base (CTB) layers and to determine which construction factors exhibit comparatively high variability within individual construction sections of the two pavement reconstruction projects included in this study. In addition, differences between construction sections tested in this research were evaluated. The research focused on the construction of CTB layers in two pavement reconstruction projects in northern Utah, one along Interstate 84 (I-84) near Morgan and one along U.S. Highway 91 (US-91) near Richmond. The significant predictor variables associated with California bearing ratio …
Incorporating Wireless Power Transfer In An Led Lighting Application, Jonathan S. Shipley
Incorporating Wireless Power Transfer In An Led Lighting Application, Jonathan S. Shipley
Theses and Dissertations
There are various situations in which electrical energy is desired but cannot by conveniently supplied. Since the days of Hienrich Hertz and Nikola Tesla, scientists have tried to solve this problem using different methods of wireless power transfer. Today, wireless power transfer has only been commercially demonstrated at small distances through use of induction. This thesis demonstrated the transfer of wireless power at relatively large distances through radio frequencies in the development of a prototype for a commercial product - a wireless household lamp.
A Solution For Commodity Field Hauling With Self-Unloading Semi-Trailers, Lee Pagens Wilkerson
A Solution For Commodity Field Hauling With Self-Unloading Semi-Trailers, Lee Pagens Wilkerson
Theses and Dissertations
Commodity hauling of bulk goods is a growing enterprise that has expanded from hauling agricultural products to hauling many other bulk products. Commodity trailers are used to haul agricultural products from storage facilities to processing plants. These trailers are designed for highway use but are frequently required to work in field conditions as well. In many cases this environment overstresses these trailers and results in permanent irreparable damage. In addition to the structural problems of these trailers, the current systems for unloading the bulk produce from these trailers have serious inadequacies. While functional, the currently used chain and non-chain driven …
A Study Of Home Builder Advertising For Smart Home Technologies, Jared Don Bingham
A Study Of Home Builder Advertising For Smart Home Technologies, Jared Don Bingham
Theses and Dissertations
The purpose of this research is to discover if home builders along the Wasatch Front in Utah are advertising smart home technologies. Research was conducted by a review of the display advertisements placed in the Saturday and Sunday editions of The Deseret Morning News/Salt Lake Tribune from March 4, 2006 through April 1, 2006. An internet search for smart home terminology was performed on the web sites of home builders advertising in The Deseret Morning News/Salt Lake Tribune. A review of the display advertisements for the Deseret Morning News/Salt Lake Tribune revealed that home builders are not using that medium …
Payback Information: It's Effect On Home Buyers Regarding Energy Efficiency, Steven E. Sparti
Payback Information: It's Effect On Home Buyers Regarding Energy Efficiency, Steven E. Sparti
Theses and Dissertations
This study was conducted to find out how payback analysis would affect consumer decision making with regards to home energy efficient upgrade packages. Three different home plans were obtained from a local builder and seven different energy efficient packages were created. Using Hot2000 the heating and cooling loads were calculated for each building, with each energy efficient package, in each of the four major cardinal directions. The averages were taken and the payback information was calculated. The payback information included the increased cost of the package, the increase in the mortgage payment, the annual savings from heating and cooling bills, …
Numerical Modeling Of Infill Rc Walls In Seismic Retrofit Of Rc Frames, Mohamed Mohamed Slah El-Din Darwish
Numerical Modeling Of Infill Rc Walls In Seismic Retrofit Of Rc Frames, Mohamed Mohamed Slah El-Din Darwish
Archived Theses and Dissertations
Columns designed and built according to older standards may be subject to damage due to seismic loading during earthquakes as a result of the lack of shear reinforcement and/or insufficient lap-splice length. An experimental program on the use of ifill RC walls in seismic retrofit of RC frames under cyclic loading was conducted in 2002. The output of this experimental work formed the basis for the validation of a numerical finite element model, in predicting forces and displacements. Subsequently the finite element model was used to perform a parametric analysis on the effects of the thickness, overall reinforcement and concrete …
Effective Modeling Of Mass Concrete Foundation Under Dynamic Loads, Ossama Salem Ali Ahmed
Effective Modeling Of Mass Concrete Foundation Under Dynamic Loads, Ossama Salem Ali Ahmed
Archived Theses and Dissertations
No abstract provided.
Quantification Of Contractors' Quality Costs In Construction Projects, Nihal Fathi El Sabbagh
Quantification Of Contractors' Quality Costs In Construction Projects, Nihal Fathi El Sabbagh
Archived Theses and Dissertations
No abstract provided.
Development Of Ferrocement U-Shaped Beams Infilled With Core Materials, Ahmed Mahdy Abdelnaby
Development Of Ferrocement U-Shaped Beams Infilled With Core Materials, Ahmed Mahdy Abdelnaby
Archived Theses and Dissertations
No abstract provided.
User Friendly Computer Software For Construction Projects Delay Analysis, Kamel Ahmed Salem El Sayed
User Friendly Computer Software For Construction Projects Delay Analysis, Kamel Ahmed Salem El Sayed
Archived Theses and Dissertations
Construction industry around the world is facing a huge revolution in terms of number of executed projects. Projects are no longer simple ones managed by few persons. Commercial buildings, high rise towers and bridges are being built everywhere. The majority of these projects are complex ones that face a lot of obstacles. Delays are one of the major obstacles that construction projects face and are very likely to occur. Generally, claims are the result of any delay in the construction progress. To be able to analyze the claim and assign the responsibility, the analyst has to perform a delay analysis. …
Off Campus Furniture Retail Development, Dan E. White, Richard D. Mccarthy, Christopher T. Cowgill
Off Campus Furniture Retail Development, Dan E. White, Richard D. Mccarthy, Christopher T. Cowgill
Honors Theses
The development of a 3.3 acre parcel of land at 5110 S. Westnedge, City of Portage, Kalamazoo County, Michigan is being proposed by Cowgill and Associates Inc. This will be a commercial development project with Off Campus Furniture taking occupancy after construction is complete. The building will be two stories with 57,500 square feet of usable floor space. All design was completed in accordance to the City of Portage, and the Michigan building code with design being done in accordance to ACI Code 318-05. The development includes but is not limited to site work, including storm water runoff and design, …
Repair, Inspection And Maintenance Methods Of Steel Bridges, Deepak Koirala
Repair, Inspection And Maintenance Methods Of Steel Bridges, Deepak Koirala
Masters Theses
Transportation infrastructure is the backbone of American commerce & industry at the advent of the 21st century. Bridges are the key elements of the transportation system of a country. According to National Bridge Inventory 2005, there are approximately six hundred thousand bridges in United States, among them nearly one third of bridges are functionally obsolete. A lack in performance of such structures, with respect to minimum acceptable standards, has direct impact not only on the highway system but also on public safety as well as economic growth. Systematic and well-designed research will provide the most effective approach to the …
Course Portfolio For Arch333/Cnst305: Building Environmental Technical Systems, Tim Wentz
Course Portfolio For Arch333/Cnst305: Building Environmental Technical Systems, Tim Wentz
UNL Faculty Course Portfolios
Due to the critical nature of team-based learning in this course, I propose to study the learning aspects of team-based learning, as I envision it in this course. Not having formally investigated this issue previously, I am left with a sense that some teams perform much better than other teams. I am looking for those criteria that separate the good teams from underperforming teams. Some of the issues that occur to me as I start this process include the following: - Team size - Academic diversity - Discipline diversity - Gender diversity - Geographic diversity How students best learn in …
Encryption Of Computer Peripheral Devices, Kelly Robert Norman
Encryption Of Computer Peripheral Devices, Kelly Robert Norman
Theses and Dissertations
Computer peripherals, such as keyboards, scanners, printers, cameras, and Personal Data Assistants (PDAs) typically communicate with a host PC via an unencrypted protocol, leaving them vulnerable to eavesdropping techniques, such as keyloggers. An encryption system was developed that is simple enough to be used in peripherals that do not have large amounts of processing power and memory. A software driver loaded in the operating system of the host computer communicates with a simple 8-bit microcontroller in the peripheral device. The driver handles key generation, key exchange, and provides decrypted data to the operating system. A key exchange protocol allows the …
Risk-Based Decision Model For Determining The Applicability Of An Earned Value Management System In Construction, Mark D. Workman
Risk-Based Decision Model For Determining The Applicability Of An Earned Value Management System In Construction, Mark D. Workman
Theses and Dissertations
New policy mandated by the Undersecretary of Defense for Acquisition, Technology and Logistics has lowered the dollar thresholds of contracts requiring earned value management (EVM). This policy directed that a "risk-based decision" be made to determine if EVM should be used on firm-fixed price contracts under $20 million. Although not previously applicable to Military Construction (MILCON) building projects or other Air Force Civil Engineer (CE) managed contracts, the new threshold requires that CE projects be evaluated for risk. Therefore, the focus of this research was to analyze the risk factors associated with construction contracts in an attempt to build a …
The Art And Science Of Discontinuous Innovation: A Case Study In Product Reinvention, Daniel C. Smoot
The Art And Science Of Discontinuous Innovation: A Case Study In Product Reinvention, Daniel C. Smoot
Theses and Dissertations
Divergence of new and old technologies is a source of tremendous innovation potential. As the dizzying pace of technological innovation accelerates indefinitely into tomorrow, not only do new paths diverge exponentially; doors already opened are increasingly abandoned for the allure of things undiscovered. Mature, late-stage life-cycle products left behind in today's fast-paced world open the floodgates to reinvention. This paper tests the hypothesis that innovativeness can be encouraged through the learning and application of universal innovation principles and processes. The implications of this research area are far-reaching. If innovation can be encouraged, then it can likely be taught. If it …
The Role Of The Architect: Changes Of The Past, Practices Of The Present, And Indications Of The Future, Chad B. Jones
The Role Of The Architect: Changes Of The Past, Practices Of The Present, And Indications Of The Future, Chad B. Jones
Theses and Dissertations
For centuries the architect was the master builder; the one who was responsible for both the design and the construction of a project with sufficient construction expertise to oversee the project from inception to completion. Eventually, complexity of projects required a higher level of specialization leading to the separation of the designer and the builder. Since that separation, the role of the designer, or architect, has continued to shift and evolve. In recent history, the architect has been the one selected by a building owner, at the inception of the project, as the professional who is able to assist and …
Automated Manipulation For The Lotus Filament Winding Process, Jeffrey V. Anderson
Automated Manipulation For The Lotus Filament Winding Process, Jeffrey V. Anderson
Theses and Dissertations
The filament-winding process produces quality consistent composite parts for many industries. Filament winding allows for consistent quality parts by automating the winding process. A recent development of filament winding is the Lotus process. The Lotus process reverses conventional filament winding by leaving the mandrel stationary and winding composite fiber around the mandrel. The automated Lotus filament-winding machine is controlled by four-axis control manipulating the Lotus ring around a fixed mandrel. This allows Lotus filament winding to wind parts that do not have a linear axis. Lotus filament winding is in its early stages of development. As a second step in …
A Decision Model For Choosing Among Photovoltaic Technologies To Generate Electricity At Grid-Connected Air Force Facilities: A Value-Focused Approach, Mostyn O. Kellner
A Decision Model For Choosing Among Photovoltaic Technologies To Generate Electricity At Grid-Connected Air Force Facilities: A Value-Focused Approach, Mostyn O. Kellner
Theses and Dissertations
The United States is currently consuming fossil fuels faster than natural processes can replace them. Our nation's leaders recognize that a diverse energy portfolio including renewable energy is the key to maintaining our economy, security, and the environment. The federal government is by far the greatest energy consumer; thus, our nation's leaders have directed federal agencies to strive to increase the use of renewable energy at federal facilities. Solar electricity technologies, in the form of photovoltaics, have great potential in the renewable energy mix. Although a major strategy should be integrating photovoltaics into the design of new facilities, an important …