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Articles 80941 - 80970 of 83008
Full-Text Articles in Entire DC Network
Streamflow Forecasting For The Logan And Blacksmith Fork Rivers In Northern Utah, Kenneth A. Mangelson
Streamflow Forecasting For The Logan And Blacksmith Fork Rivers In Northern Utah, Kenneth A. Mangelson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Accurate streamflow forecasts have been recognized as being important by water users and others whose occupations and pursuits depend upon the supply of water from snow fed streams.
The streamflow forecasting equations for the important predictive periods, in particular the April through September and the May through September total flows, were developed in this study for both the Logan and Blacksmith Fork Rivers.
Multiple linear regress ion was used as a mathematical model in determining the streamflow forecasting equations. A correlation analysis was used to determine the importance of the variables used in the mathematical model. The results of this …
Design Criteria For Usu Stilling Basin Pipe Flow To Open Channels, Chi-Yuan Wei
Design Criteria For Usu Stilling Basin Pipe Flow To Open Channels, Chi-Yuan Wei
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Criterion have been developed in this study for designing a stilling basin to serve as a transition from pipe flow to open channel flow. The purpose of the structure is to prevent erosion in an open channel. The unsteadiness, or smoothness, of the water surface in the model basin was used as the criterion for evaluating the effectiveness of the structure for energy dissipation.
The introduction of a short-pipe energy dissipater in the stilling basin has proven effective in dissipating energy. The stilling basin was designed for a fully submerged pipe outlet. The inflow pipe and the dissipator pipe were …
An Evaluation Of Temperature Distribution Within Asphalt Pavements And Its Relationship To Pavement Deflection, Herbert F. Southgate
An Evaluation Of Temperature Distribution Within Asphalt Pavements And Its Relationship To Pavement Deflection, Herbert F. Southgate
Kentucky Transportation Center Research Report
The attached report presents significant progress and achievements in the area of asphalt pavement design. Benkelman beam deflections were used extensively in conjunction with our 1958 study of asphalt pavement performance; apparent relationships between 18–kip deflections and pavement structures were evident then although scatter in the data was thought to be necessarily admissible. During the spring and summer of 1966, another extensive series of pavements, built since 1958, were evaluated from the standpoint of performance and deflection. It seemed compelling at that time to adjust all deflections to some common reference temperature and so the surface temperature of the pavement …
The Crab Orchard And Osgood Formations: The Case For Slope Instability, Robert C. Deen
The Crab Orchard And Osgood Formations: The Case For Slope Instability, Robert C. Deen
Kentucky Transportation Center Research Report
For the past few years, the Division of Research, as a part of its continuing study of the occurrence of landslides in Kentucky, has reviewed and studied several sites in order to identify and delineate the geologic and soil formations which might be involved in the unstable earth masses. After a study of a number of landslides, it became evident that one particular material was highly susceptible to the development of landslides. This material, in Eastern Kentucky, is known as the Crab Orchard Formation and was deposited during the middle Silurian age. The Crab Orchard Formation, a deposit some 50 …
Analysis Of Traffic Loads On Bridges, Robert L. Lynch
Analysis Of Traffic Loads On Bridges, Robert L. Lynch
Kentucky Transportation Center Research Report
This report contains information concerning:
- The statistical determination of frequencies of critical axle loadings on highway bridges and
- The adaptability and adaptability of historical loadometer and classification data in Kentucky to the recently adopted AASHO design criteria for evaluating the fatigue history of existing bridges.
The analysis of the fatigue history of a bridge consists of evaluating the distribution of instantaneous axle loadings over the applicable period. Because of the urgency, only historical records currently available were used as source data. This report is therefore divided into two sections: 1) a summary of quantitative results based on available data, and …
Hq Amc Go 5, Missile Intelligence Directorate, Us Army Missile Command, Huntsville, Alabama, 19 January 1968., Headquarters Us Army Materiel Command, Robert Bolin , Depositor
Hq Amc Go 5, Missile Intelligence Directorate, Us Army Missile Command, Huntsville, Alabama, 19 January 1968., Headquarters Us Army Materiel Command, Robert Bolin , Depositor
United States Department of Defense Military Intelligence
This order established the Missile Intelligence Directorate (MID) as an intelligence agency assigned to the US Army Missile Command to “… develop, maintain, and disseminate foreign scientific and technical intelligence concerning ground forces, surface-to-surface, surface-to-air, and anti-ballistic missile systems in response to valid Department of Defense, Department of the Army, and Army Materiel Command production requirements.”
This order established the second intelligence production organization within the Army Materiel Command. The first being the US Army Foreign Science and Technology Center.
Application Of Stanford Watershed Model Concepts To Predict Flood Peaks For Small Drainage Areas, K. D. Clarke
Application Of Stanford Watershed Model Concepts To Predict Flood Peaks For Small Drainage Areas, K. D. Clarke
Kentucky Transportation Center Research Report
This report embodies two principal objectives: 1) updating rainfall intensity-duration curves for the hydraulic design of culverts and 2) adaptation of the Stanford Watershed Model concept to small drainage basins in Kentucky. The first objective is familiar -- the curves presently being used for the rational method of design were established from an earlier Department study made by E. M. West and W. H. Sammons, issued in July, 1955 (Report No. 2, "A Study of Runoff from Small Drainage Areas and the Openings in Attendant Drainage Structures"), and were based on rainfall records then available through 1951. The second objective …
A Numerical (Matrix) Solution For The Vibration Frequencies And Modes Of A Nonuniform Rectangular Plate With Arbitrary Edge Conditions, F. David Utterback
A Numerical (Matrix) Solution For The Vibration Frequencies And Modes Of A Nonuniform Rectangular Plate With Arbitrary Edge Conditions, F. David Utterback
Masters Theses
"The material presented in this thesis is designed to provide the practicing engineer with a practical, approximate method of solution for the increasingly important problem of plate vibrations. The technique presented herein is basically an application of the use of generalized coordinates to describe the elastic and inertial properties of a finite element representation of a nonuniform rectangular plate. The plate will be idealized by utilizing a modification of the grid work technique developed by Hrennifkoff as a lattice work of interconnecting beams. By employing the elastic displacements as generalized coordinates, the only required compatibility conditions are that the displacements …
Research On Roadside Development And Maintenance : Part 1 - Bluegrass Research : Progress Report, William Hugh Daniel, Terrance P. Riordan
Research On Roadside Development And Maintenance : Part 1 - Bluegrass Research : Progress Report, William Hugh Daniel, Terrance P. Riordan
JTRP Technical Reports
No abstract provided.
1968 Handbook Of Facts And Figures On Indiana County Roads—Including Directory Of County Highway Departments, Jean E. Hittle
1968 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.
Urban Geology—A Need And A Challenge, William J. Wayne
Urban Geology—A Need And A Challenge, William J. Wayne
Department of Earth and Atmospheric Sciences: Faculty Publications
Urban land uses are rapidly converting open land into intensively used land. Generally, in planning those uses, a comprehensive study has included everything except an evaluation of the land in three dimensions. Geologists are eminently well equipped to supply the missing data, but they must also be aware of the needs of the urban community and the kinds of information needed by planners if they are to write reports usable by planners. Urban and environmental geology is a newly expanding field in the use of geologic data to help solve some urban problems in the planning stage. It is likely …
Scattering Parameter Measurements And Amplifier Design, Thomas J. Herrick
Scattering Parameter Measurements And Amplifier Design, Thomas J. Herrick
Masters Theses
"The scattering parameter formulation in describing the small-signal operation of an active two-port device is developed. The inherent advantages of measuring the scattering parameters at UHF frequencies and the clear insight into the design problem are demonstrated. Some of the practical difficulties in a typical design problem are also considered"--Abstract, page ii.
Analysis Of Semi-Conductor Ignition Systems With Emphasis On Design, Construction, And Operation Of The "Ideal" System, Frank P. Rundle
Analysis Of Semi-Conductor Ignition Systems With Emphasis On Design, Construction, And Operation Of The "Ideal" System, Frank P. Rundle
Masters Theses
No abstract provided by author.
Feasibility Of Rating Current Meters In A Velocity Field, Gaylord V. Skogerboe, Lloyd H. Austin, Roland W. Jeppson, Chi-Yuan Wei
Feasibility Of Rating Current Meters In A Velocity Field, Gaylord V. Skogerboe, Lloyd H. Austin, Roland W. Jeppson, Chi-Yuan Wei
Reports
Preliminary studies employed an 8-inch (outlet diameter) contracting cone and an 8-inch converging nozzle. The design of the cone is based on an electromagnetic analogy reported by Smith and Wang, while the nozzle was designed assuming potential flow and using numerical methods to obtain the solution. Both designs yielded fairly uniform velocity fields, any deviations being primarily due to either construction or measurement techniques. The towing tank rating for a Pygmy current meter was compared with the submerged jet rating, the difference being 1 or 2 percent. A Prototype system was constructed using a 16-inch contracting cone (d). Two Type …
Water Resources Research - A Challenge To The Social Scientists, Dean F. Peterson
Water Resources Research - A Challenge To The Social Scientists, Dean F. Peterson
Reports
No abstract provided.
Linear Programming With Random Requirements, Nak Je Kim
Linear Programming With Random Requirements, Nak Je Kim
Reports
Linear programming was first developed by George B. Dantzig, Marshall Wood, and associates of the U.S. Air Force, in 1947. At that time, the Air Force organized a research group under the title of project SCOOP (Scientific Computation of Optimum Programs). This project contributed to the developing of a general interindustry model based on the Leontief input-output model, the Air Force programming and budgeting problem, and the problems which involved the relationship between two-person zero sum games and linear programming. The result was the formal development and application of the linear programming model. This project also developed the simplex computational …
Air Pollution Control And Abatement Proceedings Of A Symposium, Allen D. Kartchner
Air Pollution Control And Abatement Proceedings Of A Symposium, Allen D. Kartchner
Reports
No abstract provided.
A Conceptual Model Of The San Pitch River Basin, James D. Ballif
A Conceptual Model Of The San Pitch River Basin, James D. Ballif
Reports
To meet future expected needs for water, the State of Utah will have to plan and manage its limited resources in a judicious manner. Comprehensive water resources planning on a river basin basis is necessary to economically plan and develop the best combination of water uses. Efficient use and management of agricultural water is necessary to maximize the amount available for future needs. Irrigation water management must be improved. Improvements in the organization, storage, distribution, and method of application will be required to meet future demands. Consideration should be given to various combinations of conjunctive use of groundwater and surface …
Atomic Absorption As An Index Of The Silver Concentration In Precipitation, Silver Iodide Plume Studies, Part 1, Joel E. Fletcher, H C. Millar
Atomic Absorption As An Index Of The Silver Concentration In Precipitation, Silver Iodide Plume Studies, Part 1, Joel E. Fletcher, H C. Millar
Reports
The Perkin Elmbver Model 303, equipped with the DCR-1, digital concentration readout, was evaluated as to its ability to provide an index of silver concentration in water solutions, without concentrating in any manner. The procedures, principal settings, and adjustments which must be observed are described.
This instrument can detect the difference between concentrations of 10-15 and 10-12 gm/ml. However, as the concentration of silver decreases the experimental error increases to a point at which the error becomes greater than the differences in readout due to differences in silver concentration.
Transport Of ⁸⁵Sr And ¹³⁷Cs Under Induced Clay Suspensions, Purush Terkonda
Transport Of ⁸⁵Sr And ¹³⁷Cs Under Induced Clay Suspensions, Purush Terkonda
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
“The purpose of this study was to evaluate the effect of induced clay suspensions on the transport of 85Sr and 137Cs in an aqueous environment.
An instrumented flume was used as a model river to simulate an environment typical of a slow-moving, unpolluted, turbid stream. Modified longitudinal dispersion relationships were used to describe the transport of radionuclides in turbid streams. Data were derived from instantaneous release of 85Sr and 137Cs with suspended Attapulgite and Kaolinite clays. Continuous release of 137Cs with an Attapulgite clay suspension helped to establish uptake and transport characteristics for one environmental …
The Identification And Evaluation Of Toxic Effects Of Organic Micropollutants, John Warren Smith
The Identification And Evaluation Of Toxic Effects Of Organic Micropollutants, John Warren Smith
Doctoral Dissertations
No abstract provided.
Radiation And Annealing Characteristics Of Neutron Bombarded Silicon Transistors, L. S. Su, G. E. Gassner, C. A. Goben
Radiation And Annealing Characteristics Of Neutron Bombarded Silicon Transistors, L. S. Su, G. E. Gassner, C. A. Goben
Electrical and Computer Engineering Faculty Research & Creative Works
Operating a silicon planar epitaxial transistor in the inverse configuration allows one to demonstrate clearly the importance of the neutron-induced base current component and its degradation of the emitter efficiency, and, because of the much larger depletion layer, to compute a volume dependent damage constant applicable to all silicon p-n junctions. The importance of minimizing the absolute change versus relative change in radiation hardening studies is clearly illustrated. Surface effects were found to be significant for transistors mounted in gas-filled cans. The diffusion potential was predicted, on theoretical grounds, to vary with neutron fluence, and the theory was experimentally confirmed. …
The Compressibility Of Preconsolidated Till, William H. Koechlein
The Compressibility Of Preconsolidated Till, William H. Koechlein
Masters Theses
"Preconsolidated glacial till was tested "in-situ" with the Geoprobe and in the laboratory on undisturbed soil samples. The two soil testing methods were compared and three tests; consolidation, "thin-cake", and Geoprobe were analyzed to see if a more rapid method for determining the preconsolidation stress of soil could be developed. When comparing Geoprobe results to laboratory results for foundation conditions, it was found the two methods agreed on bearing capacity but differed significantly on settlement. The three tests analyzed for determining the preconsolidation stress indicated they are a function of preconsolidation stress even though there was variation in the test …
The Density Of Horizontal Control In Missouri, Norman Lee Brown
The Density Of Horizontal Control In Missouri, Norman Lee Brown
Masters Theses
"In 1965 the Missouri Legislature passed House Bill 201 adopting the Missouri Plane Coordinate System as computed by the United States Coast and Geodetic Survey. The requirements of this law and the density and distribution of usable control within the state is the topic of this thesis"--Abstract, page ii.
A Study Of A Model-Referenced Adaptive Control System, James William Graham
A Study Of A Model-Referenced Adaptive Control System, James William Graham
Masters Theses
"A model-referenced adaptive controller for a first-order plant with time-varying parameters is developed using Lyapunov's second method. The system is studied with the aid of analogue computer simulation and an oscillatory mode is encountered. A method of reducing the oscillations by addition of a compensating network is proposed. The compensation is obtained through the use of linearization and root locus techniques. The compensated system shows a much improved error response over the original system"--Abstract, page ii.
Chemical Precipitation Of Phosphorous With Sodium Aluminate And Alum In The Activated Sludge Aeration Chamber, Richard Charles Vedder
Chemical Precipitation Of Phosphorous With Sodium Aluminate And Alum In The Activated Sludge Aeration Chamber, Richard Charles Vedder
Masters Theses
"The purpose of this investigation was to study the removal of phosphorus by chemical precipitation with sodium aluminate and alum in the activated sludge aeration chamber, and determine the effect of the aluminum to phosphorus ratio and the mixed liquor suspended solids concentration on the phosphorus removal efficiency and the effect of the precipitants on the removal of organic pollutants in the activated sludge process. The studies were conducted on settled domestic sewage in three bench-scale continuous flow activated sludge units supplemented with jar tests. Major parameters employed included influent and effluent total phosphorus and chemical oxygen demand (COD), mixed …
An Unsteady-State Method For Determining The Thermal Conductivity Of Materials, Richard H. Bulmer
An Unsteady-State Method For Determining The Thermal Conductivity Of Materials, Richard H. Bulmer
Masters Theses
"Originally this work was initiated to develope [sic] a method for measuring the thermal diffusivity and thermal conductivity of metals. Due to the characteristics of the method and the equipment used, it was concluded that the technique is not suitable for materials of high conductivity. However, results show that the apparatus is valuable for the determination of the thermal diffusivity of relatively poor heat conductors. The favorable characteristics of the method are its rapidity and basic simplicity"--Abstract, page ii.
Effects Of Pressure On The Mechanical Properties Of Magnesium, Joseph George Hoeg
Effects Of Pressure On The Mechanical Properties Of Magnesium, Joseph George Hoeg
Masters Theses
"The data collected in an attempt to evaluate the pressure dependency of the mechanical properties of extruded AZ31B-F magnesium alloy are presented herein. This information was compiled from the results of compression tests run in hydraulic fluid environments pressurized to 50,000 psi, and tension tests run in the atmosphere. Specimen axial load and longitudinal strain were recorded and converted to effective stress and effective strain parameters for presentation. The term pressure is defined, in this report, as the negative average of the principal stresses or, essentially, the negative of the hydrostatic component of stress. The effective stress and strain, at …
Analysis Of A Focus Log Electrode In A Non Homogeneous Medium, John Julian Zenor
Analysis Of A Focus Log Electrode In A Non Homogeneous Medium, John Julian Zenor
Doctoral Dissertations
"The mathematical model presented for the focused logging system is applicable to any resistance logging tool of the electrode type. Horizontal or cylindrical resistance interfaces may be included in any combinations. The tool and its environment are compartmentalized, and the integral form of the condition for continuity of current is applied to each compartment. Acceleration methods are applied to the iterative solution of the resulting large-scale system of linear equations. Two specific models are presented, one for the study of the effects of invasion and the other for the study of the effects of bed thickness on the apparent resistivity …
Hrva - A Velocity Analysis Technique For Seismic Data, John Charles Robinson
Hrva - A Velocity Analysis Technique For Seismic Data, John Charles Robinson
Doctoral Dissertations
"A High-Resolution Velocity Analysis (HRVA) has been developed for the determination of the root-mean-square subsurface-velocity energy spectrum from gated seismic data which has been normal-moveout corrected. All calculations are performed in the frequency-space or frequency-wavenumber domain; seismic gates are transformed from the time-space domain via the Fast Fourier Transform algorithm. HRVA is not restricted to the investigation of apparent horizontal velocities which have associated stepout values that are integral multiples of the time sampling interval, as are the existing correlation techniques. The technique liberally exploits the inexistence of significant energy in the higher frequency harmonies of seismic data, resulting in …