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Articles 187351 - 187380 of 193451
Full-Text Articles in Engineering
Activity-Accessibility Models Of Trip Generation : Progress Report, Tamman Zaki Nakkash
Activity-Accessibility Models Of Trip Generation : Progress Report, Tamman Zaki Nakkash
JTRP Technical Reports
No abstract provided.
Major Aspects Of The Urban Transportation Planning Process : Interim-Summary Report, William Louise Grecco
Major Aspects Of The Urban Transportation Planning Process : Interim-Summary Report, William Louise Grecco
JTRP Technical Reports
No abstract provided.
Use Of Precast, Prestressed Concrete For Bridge Decks : Progress Report, James H. Ford
Use Of Precast, Prestressed Concrete For Bridge Decks : Progress Report, James H. Ford
JTRP Technical Reports
No abstract provided.
Tests Of Prestressed Concrete Beam Splices, Martin J. Gutzwiller, Robert H. Lee
Tests Of Prestressed Concrete Beam Splices, Martin J. Gutzwiller, Robert H. Lee
JTRP Technical Reports
No abstract provided.
The Gcars Ii System : Technical Paper, A. Keith Turner
The Gcars Ii System : Technical Paper, A. Keith Turner
JTRP Technical Reports
No abstract provided.
The Gcars System Fortran Iv Programmers Manual, Part A - Programs For Data Collection And Evaluation Part 3 A, A. Keith Turner
The Gcars System Fortran Iv Programmers Manual, Part A - Programs For Data Collection And Evaluation Part 3 A, A. Keith Turner
JTRP Technical Reports
No abstract provided.
The Gcars Fortran Iv Programmers Manual, Part B - Programs For Generation Of Alternatives Part 3 B, A. Keith Turner
The Gcars Fortran Iv Programmers Manual, Part B - Programs For Generation Of Alternatives Part 3 B, A. Keith Turner
JTRP Technical Reports
No abstract provided.
Inventory Of Indiana County Bridges, Jean E. Hittle
Inventory Of Indiana County Bridges, Jean E. Hittle
Indiana Local Technical Assistance Program (LTAP) Publications
The purpose of this report is to bring county bridge needs into focus-state-wide and county-by-county-through a detailed computerized inventory listing of all existing county bridges. Each county's inventory listing has been further summarized as to the number of bridges by length and width categories, along with an estimated replacement cost. This inventory report thus gives a measure and dimension to the county bridge problem. Hopefully this information will assist local road officials, legislative study groups, and members of the General Assembly in weighing alternate solutions to the financing of county bridge programs.
1969 Handbook Of Facts And Figures On Indiana County Roads—Including Directory Of County Highway Departments, Jean E. Hittle
1969 Handbook Of Facts And Figures On Indiana County Roads—Including Directory Of County Highway Departments, Jean E. Hittle
Indiana Local Technical Assistance Program (LTAP) Publications
This handbook will assist county road officials in the planning of county road operations. The data and information included in this handbook are either statistical or public information which are already available from the official sources, but which needed to be brought together for convenient distribution and use.
Evaluation Of The Performance Of Ultrasonic Equipment For Pavement Thickness Measurements, Charles F. Scholer, Raymond Doran Pavlovich
Evaluation Of The Performance Of Ultrasonic Equipment For Pavement Thickness Measurements, Charles F. Scholer, Raymond Doran Pavlovich
JTRP Technical Reports
No abstract provided.
A Study Of Pavement Strains And Deflections Produced By Dynamic Time Forces : Progress Report, Svein Olaf Engenes
A Study Of Pavement Strains And Deflections Produced By Dynamic Time Forces : Progress Report, Svein Olaf Engenes
JTRP Technical Reports
No abstract provided.
A Study Of The Behavior Of Reinforced Concrete T-Beams Subjected To Repeated Loads, Robert S. Platoni
A Study Of The Behavior Of Reinforced Concrete T-Beams Subjected To Repeated Loads, Robert S. Platoni
JTRP Technical Reports
No abstract provided.
Plan Design Model For Urban Area Use Allocations : Draft Copy, W. Don Stewart, William Louise Grecco
Plan Design Model For Urban Area Use Allocations : Draft Copy, W. Don Stewart, William Louise Grecco
JTRP Technical Reports
No abstract provided.
The Irish Plumbing And Heating Engineer, January 1969 (Complete Issue)
The Irish Plumbing And Heating Engineer, January 1969 (Complete Issue)
Building Services Engineering
No abstract provided.
Shock Shields, Asbjorn Kvammen Jr.
Shock Shields, Asbjorn Kvammen Jr.
Civil Engineering ETDs
A series of tests was conducted to obtain information concerning the effectiveness of a shock shield of reinforced concrete between ground surf ace and a buried structure as a means of reducing the shock transmitted to the structure due to airblast loading. Two shock shields were used. The diameter of both shields was 20 inches and the thicknesses were 6 inches and 2 feet. The structure was 20 inches in diameter with a thickness of 5 feet. Tests were performed in a 2- by 40-foot shock tube without shock shield and structure, with structure only, and with different thicknesses of …
Spherical Antenna Array, Narong Yoothanom
Spherical Antenna Array, Narong Yoothanom
Doctoral Dissertations
"The far field radiation pattern of an isotropic spherical antenna array with two types of element distributions, a latitude-longitude distribution and an approximately equally-spaced distribution, has been analyzed using Poisson's Sum Formula. Beamwidth expressions of both element distributions are found in various planes. All numerical results are given only for the case of 21 rings"--Abstract, page ii.
X-Ray Determination Of Lattice Parameters And Thermal Expansion Coefficients Of Aluminum, Silver And Molybdenum At Cryogenic Temperatures, Claude Lowell Woodard
X-Ray Determination Of Lattice Parameters And Thermal Expansion Coefficients Of Aluminum, Silver And Molybdenum At Cryogenic Temperatures, Claude Lowell Woodard
Doctoral Dissertations
"A multiple exposure back reflection diffraction camera was designed to mount on the vacuum jacket of a pressurized helium gas "Cryomite". With this design it is possible to obtain six diffraction exposures on a single film at any temperature in the range of 180 to 25°K. temperatures within this range are reached in short intervals and exposure periods are less than 30 minutes in a 2.875 inch (73.03 mm) diameter camera. Some of the advantages of this design are; direct measurements, multiple exposures on a single film, short exposures, direct compensation of film length changes due to evacuation or processing …
A Crystallization Study Of A Tetrasilicic Fluormica Glass, William H. Daniels
A Crystallization Study Of A Tetrasilicic Fluormica Glass, William H. Daniels
Doctoral Dissertations
"The transformation of a synthetic mica composition K₂Mg₅Si₈O₂₀F₄ from amorphous to crystalline structure was studied isothermally at selected temperatures from 560°C to 1150°C. thermal changes associated with the transformation were followed by differential thermal analysis techniques. Structural changes promoted by the isothermal treatments were observed by density measurements, Debye-Scherrer X-ray diffraction techniques, electron replication microscopy, and electron scanning microscopy. Isothermal treatment at 450°C for 9 hours produces structural ordering in quenched K₂Mg₅Si₈O₂₀F₄ glass. Fluorine exerts a significant influence on the transformation temperature; decreasing amounts of fluorine producing increasing transformation temperatures. The crystallizing phase rapidly attains a limiting particle size and …
A Finite Element Method For Geometrically Nonlinear Large Displacement Problems In Thin, Elastic Plates And Shells, Ronald August Melliere
A Finite Element Method For Geometrically Nonlinear Large Displacement Problems In Thin, Elastic Plates And Shells, Ronald August Melliere
Doctoral Dissertations
"A finite element method is presented for geometrically nonlinear large displacement problems in thin, elastic plates and shells of arbitrary shape and boundary conditions subject to externally applied concentrated or distributed loading. The initially flat plate or curved shell is idealized as an assemblage of flat, triangular plate, finite elements representing both membrane and flexural properties. The 'geometrical' stiffness of the resulting eighteen degree-of-freedom triangular element is derived from a purely geometrical standpoint. This stiffness in conjunction with the standard small displacement 'elastic' stiffness is used in the linear-incremental approach to obtain numerical solutions to the large displacement problem. Only …
A Method For Determining Transient Stability In Power Systems, Charles A. Gross
A Method For Determining Transient Stability In Power Systems, Charles A. Gross
Doctoral Dissertations
"Given a three phase ac power system consisting of synchronous alternators interconnected by transmission lines and other items of electrical transmission equipment, a method is presented which determines the stability of the system when subjected to a three phase symmetrical fault, and to the subsequent clearing of the fault. It is inherent in the method that an estimation of system stability, assuming an instantaneous clearing of the fault, is available. The critical clearing time is therefore determined. The effect of a speed control loop on the system's largest machine is investigated. The method is applied to two, three, four, and …
A Theoretical Study On The Interpretation Of Resistivity Sounding Data Measured By The Wenner Electrode System, Siew Hung Chan
A Theoretical Study On The Interpretation Of Resistivity Sounding Data Measured By The Wenner Electrode System, Siew Hung Chan
Doctoral Dissertations
"This thesis deals with a theoretical study on the interpretation of resistivity sounding data measured by the Wenner electrode system. The objectives of this investigation are twofold: (i) to derive from the apparent resistivity data some suitable functions from which the resistivity and thickness of each member of the sequence of layers composing the earth may be determined, and (ii) to devise suitable methods for analyzing the resulting functions. In this investigation it is shown that the solution of the boundary value problem associated with an n-layered earth model leads to an integral equation for the Wenner electrode system. This …
Calorimetry Of Room Temperature Deformed Copper, George Juri Filatovs
Calorimetry Of Room Temperature Deformed Copper, George Juri Filatovs
Doctoral Dissertations
"An adiabatic anisothermal differential calorimeter for the study of room temperature deformed 99.999% pure copper has been constructed. An annealed and a deformed specimen were heated at a constant rate in adiabatic surroundings and the differences in energy released between samples was obtained. The control circuits were automatic. Deformation was by elongation ranging from 12 to 40%, and the corresponding energy found was from 1.9 to 5.3 calories/gram-atom. No recovery energy was found. The results obtained generally agree with published results and, in particular, verify Gordon's isothermal annealing results. It is proposed that the criteria for the presence of recovery …
Diffusion Of Iron And Cobalt In Nickel Single Crystals, Charles Frederick Heuer
Diffusion Of Iron And Cobalt In Nickel Single Crystals, Charles Frederick Heuer
Doctoral Dissertations
"Diffusion coefficients of iron-59 in nickel have been determined in the temperature range 815°C to 1200°C. The temperature dependence can be represented by an Arrhenius type relationship,...The effect of the isotopic mass on the diffusion coefficient of cobalt in nickel has also been investigated. The isotope effect parameter, E, was found to vary from .26 to .84 over the temperature range 970.5°C to 1200°C. Both results are consistent with the single vacancy mechanism of diffusion. No evidence of divacancy contributions to the mass transport has been found"--Abstract, Page i.
Numerical Inversion Of The Laplace Transformation And The Solution Of The Viscoelastic Wave Equations, Abbas Ali Daneshy
Numerical Inversion Of The Laplace Transformation And The Solution Of The Viscoelastic Wave Equations, Abbas Ali Daneshy
Doctoral Dissertations
"In the numerical inversion of Laplace transform two general techniques of inversion are analyzed; a study of the procedures based on an expansion of f̄(s) by a polynomial in 1/s (Salzer's method) provides accurate results for certain ranges of t. A curvature criterion for the selection of the range of points for polynomial interpolation, and a geometric distribution in this interval markedly improves the range and the degree of accuracy of inversion. The results may be further improved by multiplying f̄(s) by 1/s of 1/s². Other procedures are based on approximation of f̄(t). This investigation includes a general review of …
Signal Distortion In A Regenerative Frequency Divider, Carl Ray Ryan
Signal Distortion In A Regenerative Frequency Divider, Carl Ray Ryan
Doctoral Dissertations
"A regenerative frequency divider can be constructed with one integrated circuit and a single-pole tuned circuit. The divider can be used as a means for reducing the modulation index of either deterministic or random signals. This reduction in modulation index can simplify many signal processing schemes. This technique can be used up to S-band frequencies. The mathematical model of the regenerative frequency divider corresponds very closely to that of a first order Phase Locked Loop (PLL). The loop gain is determined in part by the nonlinear element used in the feedback loop. The loop gain is also proportional to the …
A Study Of The Anodic Oxidation Of Acetylene On Platinum-Gold Alloys, Christopher Kuo-Chieh Wu
A Study Of The Anodic Oxidation Of Acetylene On Platinum-Gold Alloys, Christopher Kuo-Chieh Wu
Doctoral Dissertations
"The anodic oxidation of acetylene on Pt-Au alloys of four compositions (80-20, 60-40, 40-60, and 20-80 Pt-Au) was studied at 80°C in solutions of constant pH and unit normality. Currents were measured as a function of potential and partial pressure of acetylene. The effects of temperature on current in 1 N H₂SO₄ and 1 N NaOH and the coulombic efficiencies for CO₂ production were determined. The experimental results indicated that the alloys can be classified into three groups, Pt-rich, Au-rich, and intermediate compositions. A transition region (change of the mechanism) was found for the Au-rich alloys. The oxidation can be …
Dynamic Response Of Circular Plates To Transient And Harmonic Transverse Loads Including The Effect Of Transverse Shear And Rotary Inertia, Perakatte Joseph George
Dynamic Response Of Circular Plates To Transient And Harmonic Transverse Loads Including The Effect Of Transverse Shear And Rotary Inertia, Perakatte Joseph George
Doctoral Dissertations
"Using an improved theory of plate vibration suggested by R. D. Mindlin which takes into account the effects of transverse shear and rotary inertia, free and forced transverse vibrations of uniform circular plates are studied and the results compared with those obtained using the classical theory of plate vibration. The governing equations are developed in polar coordinates using the equations of elasticity. Frequency equations for axisymmetric and antisymmetric vibrations are derived for solid circular plates under different boundary conditions and for an annular plate rigidly mounted on a shaft. The response of plates to different types of rapidly applied axisymmetric …
Water Quality Telemetry, Final Progress Report, Duard S. Woffinden, Allen D. Kartchner
Water Quality Telemetry, Final Progress Report, Duard S. Woffinden, Allen D. Kartchner
Reports
Water quality standards are now part of the legal code set up to control water pollution. In order to ascertain that these standards are being met, it is mandatory to monitor any river system over which control must be maintained. For optimum, usefulness, data on the monitored variables should be available on a real time basis at any time throughout the 24-hour day. Remote sampling stations and a telemetry link represent the most practical means of accomplishing this end. A water quality monitoring system utilizing radio telemetry has been developed at the Utah Water Research Laboratory (UWRL). The system consists …
Influence Of Mountain Groundwater On Streamflow, Bi-Huei Wang, Roland W. Jeppson
Influence Of Mountain Groundwater On Streamflow, Bi-Huei Wang, Roland W. Jeppson
Reports
This investigation has determined the quantities of water stored as groundwater in the three watersheds in Utah, Logan River upstream from State Dam, South Fork Ogden River upstream from Huntsville, and Weber River upstream from Oakley. The proportion of the total streamflow contributed from this groundwater storage has been determined from past streamflow records, and the knowledge obtained from the analysis of groundwater contribution to streamflow has been utilized in developing water supply forecasting techniques and procedures. The first phase of the study dealt with theory and methods from separating the groundwater component from the total streamflow hydrograph. The method …
Usu Telemetering Precipitation Gage Network, C. Earl Israelsen, Don L. Griffin
Usu Telemetering Precipitation Gage Network, C. Earl Israelsen, Don L. Griffin
Reports
A network of telemetering precipitation gages is operating in the mountainous areas of northern Utah, western Wyoming, and southern Idaho as part of the Wasatch Weather Modification Project. Approximately 40 individual gages collected and reported data during the 1968-69 winter season from distances up to 130 miles. In addition to the remotely located gages, the system includes an Automatic Readout Console (ARC) at the Utah Water Research Laboratory that is connected by a cable to a translator on top of Mt. Logan. The ARC is the control center for the network, interrogating in a predetermined programmed sequence the remote telemetry …