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Articles 4081 - 4110 of 4458
Full-Text Articles in Civil and Environmental Engineering
Life-Cycle Cost Analysis: A Computer Aided Tool For The Egyptian Construction Industry, Ahmed Mohamed Ahmed Ibrahim
Life-Cycle Cost Analysis: A Computer Aided Tool For The Egyptian Construction Industry, Ahmed Mohamed Ahmed Ibrahim
Theses and Dissertations
The construction industry can be considered as an indication of economical status of any country.
Texture And Young’S Modulus Of Nickel/Gamma-Alumina Composites, Abdulaziz Alamr
Texture And Young’S Modulus Of Nickel/Gamma-Alumina Composites, Abdulaziz Alamr
Masters Theses
To improve Young's modulus of 2024-T3 rolled aluminum specimens, it was electroplated with nickel reinforced with nano-particles of γAl2O3. Taguchi method was used to investigate the effect of coating variables, which were current density, coating time, and mixing rate, on the coating thickness. The coatings were tested for crystallographic texture, using pole figures of (200) and (111) for nickel and (400) for γAl2O3. Surface topography was measured using WYKO Vertical Interference Microscope. The crystallographic texture of nickel in the coating depended on the coating conditions. A universal testing machine was- used to …
Residual Stress And Wear Resistance Of Composite Coatings Of Nickel/Gamma-Alumina, Khaled Abdulrahman Al-Ogab
Residual Stress And Wear Resistance Of Composite Coatings Of Nickel/Gamma-Alumina, Khaled Abdulrahman Al-Ogab
Masters Theses
Nickel reinforced with nanoparticles of γ−Al2O3 have been successfully codeposited on 2024-T3 cold rolled aluminum alloy by electrodeposition with direct current. The effects of current density, particle concentration in the nickel sulfamate bath, air agitation, and coating time on Ni/γ−Al2O3 composite have been investigated. The residual stresses and wear resistance of the Ni/γ−Al2O3 composite have been measured using X-ray diffractometer and pin-on-disk techniques respectively. The residual stress and wear resistance behavior of the composite were compared with those of nickel-only deposits. An annealed ground nickel, which was mechanically removed from the …
Performance Comparison Of A Roundabout Versus Two-Way Stop Controlled (Twsc) Intersections, Deogratias Eustace
Performance Comparison Of A Roundabout Versus Two-Way Stop Controlled (Twsc) Intersections, Deogratias Eustace
Civil and Environmental Engineering and Engineering Mechanics Faculty Publications
The superior safety record of modern roundabouts is well known in Western Europe, Australia and in most British-influenced countries around the world. The experience from a single modern roundabout installed in the City of Manhattan, Kansas, some three years ago, also shares the same experience. A major study of the performance of Manhattan, Kansas, modern roundabout was conducted at Kansas State University (KSU) and was co-sponsored by Mac-Blackwell National Rural Transportation Study Center, Kansas State University, and the City of Manhattan. The study examined three intersections, one modern roundabout and two Two-Way Stop Controlled (TWSC) intersections with similar traffic conditions. …
Cfmms – Computerized Facilities Maintenance Management System, Prawit Rotsawatsuk
Cfmms – Computerized Facilities Maintenance Management System, Prawit Rotsawatsuk
Masters Theses
Computerized facilities maintenance management systems, previously available only to very large facilities, are now accessible to small and medium-sized maintenance organizations. Advertisements for such products promise reductions in maintenance costs. Where a manual system of maintenance management is currently employed, moderate reductions in maintenance costs and facility downtime are fully possible. Where no formal maintenance management procedures are present, the structure and case of a computerized maintenance system can result in dramatic cost reductions and improvements in facility availability. There are, however, practical limits to the applicability of computerized maintenance systems. The objective of any maintenance program is to minimize …
Learning Reinforced Concreyte Design Principles Using A Java-Vrml Based Design Studio, Amarneethi Vamadevan
Learning Reinforced Concreyte Design Principles Using A Java-Vrml Based Design Studio, Amarneethi Vamadevan
Masters Theses
Dynamics involving reinforced concrete design are the first real engineering course encountered by the undergraduate construction engineering students. Quite often its associated rigorous theories makes it an uninteresting academic hurdle for many below mediocre students. However when the theory is exemplified with multimedia, interaction and visualization techniques, the conceptual understanding is enhanced. The teaching methodology presented in this thesis is based on presenting students with an individualized, interactive and guided learning environment. The main elements of this approach are: a means of assimilating the student's interactive learning knowledge and behavior (user model), representation of the instructor's guidance and assessment knowledge …
Cost Analysis Between Saber And Design Bid Build Construction, Elwood Henry
Cost Analysis Between Saber And Design Bid Build Construction, Elwood Henry
Theses and Dissertations
The purpose of this research was to perform a cost analysis between DBB and SABER construction. The research involved traveling to Wright-Patterson and Holloman Air Force Bases to gather project information on comparable projects completed by both methods. There were a total of 46 projects collected from both bases. A methodology was developed to compare the projects completed. Projects were divided into categories containing similar types of construction. Data from the project was then used to calculate a unit cost for the project. Project comparability was demonstrated by showing the projects constructed by each method completed a similar type and …
Analysis And Correctional Procedure For The Operation Of The Huntsville Botanical Garden Reciprocating Constructed Wetland, Amy Louisa Cunningham
Analysis And Correctional Procedure For The Operation Of The Huntsville Botanical Garden Reciprocating Constructed Wetland, Amy Louisa Cunningham
Honors Capstone Projects and Theses
No abstract provided.
Epoxy-Terminated Self-Assembled Monolayers As Molecular Glues For Polymer Layers, Duangrut Julthongpiput
Epoxy-Terminated Self-Assembled Monolayers As Molecular Glues For Polymer Layers, Duangrut Julthongpiput
Masters Theses
Dense, homogeneous, and complete self-assembled monolayers (SAMs) with epoxy surface groups were fabricated from epoxysilanes to serve as a template for chemical anchoring of polymer layers. A combination of scanning probe microscopy, ellipsometry, XPS, X-ray reflectivity, and contact angle measurements was used to study their morphology and surface properties. Self-assembly of epoxysilane molecules resulted in the formation of homogeneous SAMs 0.85 nm thick with the rms surface roughness 0.2 nm. Epoxysilane SAMs were truly monomolecular films with a virtually normal molecular orientation of densely packed molecules, which were firmly attached to the substrate.
Carboxylic acid and anhydride terminated polystyrenes of …
Conform- A Computerized Job-Built Concrete Construction Formwork Design, Kajpong Pongponrat
Conform- A Computerized Job-Built Concrete Construction Formwork Design, Kajpong Pongponrat
Masters Theses
Economy in formwork design depends partly on the ingenuity and experiences of the form designer, whether a contractor or an engineer. The cost of formwork is significant, generally amounting to anywhere from 40% to 60% of the cost of a concrete structure. Judgment with respect to the development of a forming system could both expedite a project and reduce costs. The present paper addresses the development of CONFORM - an interactive menu driven PC based job-built concrete formwork design. The system is developed using Microsoft Visual Basic 6, Access 97 database, and Word 97, where a perfect integration of these …
Quantitative, Non-Destructive Calibration Of Scanned Probe Microscope Cantilevers, John Hazel
Quantitative, Non-Destructive Calibration Of Scanned Probe Microscope Cantilevers, John Hazel
Masters Theses
Principles of surface science and engineering are applied to determine scanned probe microscope cantilever spring constants. The bi-component gold-ceramic cantilever composition is modeled analytically. Finite element analysis is applied to simulate deflection behavior of the probe tip. Data from experimental determination of resonant frequency are employed to infer material characteristics. Combination of the results from these three procedures is employed to infer material characteristics. Combination of the results from these three procedures is used to produce a spring constant assessment within 10% of actual values. An additional convenient program for assessment of scanning probe microscopy cantilever spring constants is developed …
Intellicranes – A Neural Network-Based Crane Selection System, André T. Mund
Intellicranes – A Neural Network-Based Crane Selection System, André T. Mund
Masters Theses
Due to the central role of cranes in construction operations, specialists in the construction industries have cooperated in the development of structured methods and software for crane selection. Most of these software tools are for crane model selection and query the user for the type of crane to be used. Although research produced some fuzzy logic and expert system-based methods for crane type selection, no integrated systems that handle both crane selection phases are available.
IntelliCranes, a prototype integrated crane selection tool, assists in both crane type and crane model selection based on a set of inputs describing the construction …