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Articles 9511 - 9540 of 10530
Full-Text Articles in Entire DC Network
Characteristics And Models Of Outdoor Recreational Travel, Jerry G. Pigman, John A. Deacon
Characteristics And Models Of Outdoor Recreational Travel, Jerry G. Pigman, John A. Deacon
Kentucky Transportation Center Research Report
The purpose of this investigation was to examine the characteristics of outdoor recreational travel and to evaluate models of travel flow from population centers throughout the United States to outdoor recreational areas in Kentucky. Data were obtained by means of a license-plate, origin-destination survey at 160 sites within 42 recreational areas and by means of a continuous vehicle counting program at eight of these sites.
Among those characteristics of outdoor recreational travel which were examined in more detail were vehicle occupancies, vehicle classifications, and trip-length distributions. Vehicle occupancy was found to depend on the type of recreational area, distance traveled, …
A Hydrologic Model Of The Provo River Basin, Utah, Craig T. Jones
A Hydrologic Model Of The Provo River Basin, Utah, Craig T. Jones
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this paper is to develop a general hydrologic model for use on a digital computer and prove its validity by applying it to a management study of the Provo River Basin. Hydrologic equations have been proposed for each major hydrologic occurrence within a river basin. By linking these equations through restrictions on continuity of mass, a general hydrologic model can be obtained. Such a model becomes the basic tool for studying the management of the river basin hydrology. The paper describes the model components, parameter identification program, and the river basin management program.
Vibratory Roller Evaluation, Donald C. Newberry Jr.
Vibratory Roller Evaluation, Donald C. Newberry Jr.
Kentucky Transportation Center Research Report
In a field evaluation of vibratory rollers, an end-result specification based on a statistical analysis of densities obtained on previous construction projects indicated 98 percent of laboratory density (Marshall) to be desired for Bituminous Concrete, Class I Base. The minimum average of 5 density tests was set at 96.4 percent. Conventional rollers, vibratory rollers, and combinations thereof were qualified on the basis of density-growth curves determined on one or more 1000-foot test sections. An overall average compaction of 97.8 percent of Marshall density was obtained on the Cumberland Parkway project. Similar controls initiated on the Green River Parkway project were …
Annals Of The Research Division, Robert C. Deen
Annals Of The Research Division, Robert C. Deen
Kentucky Transportation Center Research Report
No abstract provided.
The Unsteady Circulation Distribution In Rotors And Its Application To Noise Studies, Assem A. Fathy
The Unsteady Circulation Distribution In Rotors And Its Application To Noise Studies, Assem A. Fathy
Electronic Theses and Dissertations
A new method for the calculation of the unsteady circulation distribution in axial flow compressors was developed. The classical assumption of representing the rotor by a two-dimensional infinite cascade was eliminated. Instead the more realistic case of a radial cascade with blades of finite length was studied. The blades were assumed to be thin and only slightly cambered. The flow was assumed ·to be incompressible and inviscid and the secondary flow effects were neglected. The velocity induced at an arbitrary point of a reference blade due to the bound vortices on the blade under consideration and the other blades and …
Models Of Outdoor Recreational Travel, John A. Deacon, Jerry G. Pigman, Kenneth D. Kaltenbach, Robert C. Deen
Models Of Outdoor Recreational Travel, John A. Deacon, Jerry G. Pigman, Kenneth D. Kaltenbach, Robert C. Deen
Kentucky Transportation Center Research Report
The purpose of this investigation was to evaluate models of travel flow from population centers throughout the United States to outdoor recreational areas in Kentucky. Data were obtained by means of a license-plate, origin-destination survey at 160 sites within 42 recreational areas and by means of a continuous vehicle counting program at eight of these sites. Attempts to simulate distributed travel flows concentrated on various single-equation models, a cross-classification model, and gravity and intervening opportunities models. The cross-classification model was found to be an acceptable means for simulating and predicting outdoor recreational travel flows and was decidedly superior to the …
0057: Addison Moffat Scott Papers, 1873-1939, Marshall University Special Collections
0057: Addison Moffat Scott Papers, 1873-1939, Marshall University Special Collections
Guides to Manuscript Collections
Charleston, West Virginia, engineer. Papers relate to the construction and improvement of navigation on the Great Kanawha River with the first system of locks and dams. Includes bid proposals and specifications for the construction of locks, dams, and buildings.
Evaluation Of Factors Influencing Driveway Accidents : Interim Report, William Walter Mcguirk
Evaluation Of Factors Influencing Driveway Accidents : Interim Report, William Walter Mcguirk
JTRP Technical Reports
No abstract provided.
Treatment Of A Pharmaceutical Waste With The Anaerobic Filter, Norman Dale Dennis Jr.
Treatment Of A Pharmaceutical Waste With The Anaerobic Filter, Norman Dale Dennis Jr.
Masters Theses
"The anaerobic filter is essentially a plug-flow, packed-bed, column type reactor in which the anaerobic bacteria responsible for the waste stabilization are attached to the filter media. This process is a relatively new concept in waste treatment which has been used only in laboratory studies. The objective of this study was to evaluate anaerobic filter performance when used to treat an actual industrial waste under controlled conditions of flow rate, organic strength and temperature.
Four 0.5 cu ft (14.25 l) laboratory filters were operated for 180 days at 35° C using a pharmaceutical waste as the substrate. By varying influent …
The Linear New City -- A Pattern For New Cities Based On Efficiency Of Transportation, Public Services, And Land Use, Elbridge Wesley Bartley Iii
The Linear New City -- A Pattern For New Cities Based On Efficiency Of Transportation, Public Services, And Land Use, Elbridge Wesley Bartley Iii
Masters Theses
"The linear new city is defined as a city consisting of some arrangement of relatively narrow, high-density strips, served by various mass transportation systems. Such a new city would be ideally suited to the implementation of the latest technology. The concentration of development along the transportation route would allow certain economies in the supply of utilities and services, as well as insuring that open space would be readily available around and throughout the city. The provisions for transportation, housing, and governmental control should combine to produce a better quality of life for the inhabitants of the linear new city"--Abstract, page …
Land Use Development At Interstate Interchanges In Indiana, Lawrence Peter Fabbroni
Land Use Development At Interstate Interchanges In Indiana, Lawrence Peter Fabbroni
JTRP Technical Reports
No abstract provided.
The Effect Of Quasi-Preconsolidation On Compression Of Clay Soils : Interim Report, John Leitch Davidson
The Effect Of Quasi-Preconsolidation On Compression Of Clay Soils : Interim Report, John Leitch Davidson
JTRP Technical Reports
No abstract provided.
Determination Of Atterberg Limits Using Moisture Tension Methods : Technical Paper, Ahmed Atef Gadallah, Eugene Robert Russell, Eldon J. Yoder
Determination Of Atterberg Limits Using Moisture Tension Methods : Technical Paper, Ahmed Atef Gadallah, Eugene Robert Russell, Eldon J. Yoder
JTRP Technical Reports
No abstract provided.
Guidelines For The Selection Of An Interchange Configuration, Thomas Ernest Mulinazzi
Guidelines For The Selection Of An Interchange Configuration, Thomas Ernest Mulinazzi
JTRP Technical Reports
No abstract provided.
Effect Of Increased Water Supply On Net Returns To Dairy Farms In Sonsonate, El Salvador, Morris Whitaker, Gary Glenn, Allen Lebaron, Boyd Wennergren
Effect Of Increased Water Supply On Net Returns To Dairy Farms In Sonsonate, El Salvador, Morris Whitaker, Gary Glenn, Allen Lebaron, Boyd Wennergren
Reports
No abstract provided.
Irrigation And Non-Irrigation Alternatives For Reducing Sugar Cane Transportation Costs In Santa Cruz, Bolivia, E. Boyd Wennergren, Allen D. Lebaron, Lee Bailey, Morris D. Whitaker
Irrigation And Non-Irrigation Alternatives For Reducing Sugar Cane Transportation Costs In Santa Cruz, Bolivia, E. Boyd Wennergren, Allen D. Lebaron, Lee Bailey, Morris D. Whitaker
Reports
No abstract provided.
A Water Resource Management Model, Upper Jordan River Drainage, Utah, Bi-Huei Wang, James I. Felix, Rick L. Gold, Craig T. Jones, J. Paul Riley
A Water Resource Management Model, Upper Jordan River Drainage, Utah, Bi-Huei Wang, James I. Felix, Rick L. Gold, Craig T. Jones, J. Paul Riley
Reports
As demands upon available water supplies increase within a river basin, there is an accompanying increase in the need to assess the downstream consequences resulting from changes at specific locations within the hydrologic system. This problem is approached in this study by digital computer simulation of the hydrologic system. Modeling concepts are based upon basic relationships which describe the various hydrologic processes. Within a hydrologic system these relationships are linked by the continuity-of-mass principle which requires a mass balance at all points. Spatial resolution is achieved by considering the modeled area as a series of subbasins. The time increment adopted …
Modification Of A Continuous Ice Crystal Replicator, Paul D. Thornley
Modification Of A Continuous Ice Crystal Replicator, Paul D. Thornley
Reports
A continuous ice-crystal replicator was modified by the addition of a gear drive to the cating wheel. This modification utilizes a positive drive force on the coating wheel rather than the friction force between the coating wheel and the film. The coating wheel operates successfully for at least 12 hours without slippage or damage to the film. Studies have uncovered several deficiencies in the replicator design which could be corrected. The correction of these deficiencies would lead to an improved quality of ice-crystal replicas. The need for continued studies in the fluid properties of Formvar solution is pointed out. Information …
A Streamflow Simulation Model For A Semi-Arid Region, Adnan A. Saad, L. Douglas James
A Streamflow Simulation Model For A Semi-Arid Region, Adnan A. Saad, L. Douglas James
Reports
A streamflow simulation model which would reproduce the essential feature of the hydrologic regime of a semi-arid region, in this case Jordan, was developmed and described. The model is intended to fit conditions which exist in such a region. The hydrologic processes components which represent the evaporation and the base flow distinguish the Jordan model from others. Development of each function of the model and its constants was based on all the minimal amount of data available. one year of data was used to calibrate the model for Wadi Zerqa watershed. The model was then applied to simualte four years …
Hydraulic Tests On Model Of Manifold Of The Pumps Of The 1974 Extension Of The Yorktown Power Station With All Combinations Of One And Two Branches Taken Out Of Operation, Roland W. Jeppson, Calvin G. Clyde, Charles Kincaid
Hydraulic Tests On Model Of Manifold Of The Pumps Of The 1974 Extension Of The Yorktown Power Station With All Combinations Of One And Two Branches Taken Out Of Operation, Roland W. Jeppson, Calvin G. Clyde, Charles Kincaid
Reports
Introduction: A description of the fabrication of the manifold model and the design of the facilities constructed to test the model under various steady state flow conditions is given in the previous report. All tests included in the last report were with equal flows occurring in each of the five branches. Since the operation of the prototype manifold will necessitate that one, and possibly two pumps, be taken out of operations when the demand for cooling water is at a minimum, Browth & Root, Inc. requested taht the performance of the manifold model be determined under steady-state conditions with: (1) …
Head Losses Due To Ring-Tite Filament Wound Elbows And Tees And Frictional Losses In Pipes Of Polyvinylchloride, Roland W. Jeppson
Head Losses Due To Ring-Tite Filament Wound Elbows And Tees And Frictional Losses In Pipes Of Polyvinylchloride, Roland W. Jeppson
Reports
This study consists of collecting and analyzing experimental data to determine the Darcy-Weisbach friction factor for 6-inch and 4-inch PERMASTRAN® pipes and the head losses due to RING-TITE filament-wound 6-inch 90° elbows, a 6 x 6-inch tee under several modes of operation, and a 6 x 6 x 4-inch tee with the flow entering a 6-inch branch and leaving through the 4-inch branch. The test program consisted of 8 series of individual tests with each series giving data for flow rates for each series ranging from 150 gpm to either 1200 gpm or 1500 gpm depending upon the series. The …
Computer Simulation Of The Hydrologic And Salinity Flow Systems Within The Bear River Basin, Robert W. Hill, Eugene K. Israelsen, J. Paul Riley
Computer Simulation Of The Hydrologic And Salinity Flow Systems Within The Bear River Basin, Robert W. Hill, Eugene K. Israelsen, J. Paul Riley
Reports
Accompanying the increased use of water resources is an increases accumulation of chemical pollutants. Te prevent degradation of the water resources beyong useful limits, pollution inputs from additional uses must be quite accurately predicted prior to implementation of the new use. The model described in this report was formulated to provide the required predictive capability for the Bear River Basin. Modeling concepts of the hydrologic system are based upon the development of basin relationships describing the hydrologic processes which are linked together by the countinuity-of-mass principle. The salinity flow system is then linked to the hydrologic system based on the …
Sorption Kinetics Part Ii: Modeling Longitudinal Concentration Profiles In A Packed Bed Reactor, David W. Hendricks
Sorption Kinetics Part Ii: Modeling Longitudinal Concentration Profiles In A Packed Bed Reactor, David W. Hendricks
Reports
A mass balance simulation model for sorption in a packed bed reactor was developed. All of the terms in the model, consisting of constants of the porous media, and functions, were evaluated by independent laboratory studies. The kinetic term was determined in Part I. Two numerical schemes (an explicit scheme and an implicit scheme respectively) with corresponding computer programs were developed and made operational. They were not tested against laboratory column results due to long times necessary on the computer and corresponding high costs. Laboratory testing consisted of measuring column profiles for six different packed columns at different flow rates …
Hydrologic Inventory Of The Bear River Study Unit, Frank W. Haws
Hydrologic Inventory Of The Bear River Study Unit, Frank W. Haws
Reports
Purpose and Scope of Study.
The 1963 Utah State Legislature authorized the Utah Water and Power Board (now the Utah Division of Water Resources) to develop a state water plan in order to give coordination and direction to the activities of all state and federal agencies concerned with Utah's water resources. To facilitate the development of this plan, a proposal was submitted through the State Planning Coordinator in the Governor's Office to the Urban Renewal Administration of the Housing and Home Finance Agency. Funding was approved effective May 19, 1966, under the Urban Planning Assistance Program authorized by Section 701 …
A Study Of Water Institutions In Utah And Their Influence On The Planning, Developing, And Managing Of Water Resources, Frank W. Haws
A Study Of Water Institutions In Utah And Their Influence On The Planning, Developing, And Managing Of Water Resources, Frank W. Haws
Reports
Preface: For the purposes of this study an institution is defined as a formal framework or organization through which men pool their efforts and resources to accomplish specific purposes. Included in this framework is the pattern of organization and authority, the legal structure and the governmental rules and regulations that must be adhered to during the process of reaching the stated goals. The institutions related to water resources are many and varied and include: political governments (state, county, city, etc.); subdivisions of government created by legislative consent such as irrigation districts, special improvement districts, metropolitan water companies (a department in …
Effects Of Baffles On The Performance Of Anerobic Waste Stabilization Ponds, Stephen B. Nielson, E. Joe Middlebrooks, Donald B. Porcella
Effects Of Baffles On The Performance Of Anerobic Waste Stabilization Ponds, Stephen B. Nielson, E. Joe Middlebrooks, Donald B. Porcella
Reports
The performance of three baffled model ponds was monitored and compared to the performance of an unbaffled model pond utilizing four hydraulic and organic loading rates. All four ponds were operated simultaneously under the same environmental conditions using a synthetic wastewater.
Removal of organic carbon by the biological system in the different pond configurations only varied from 94-98 percent at the longest detention time (15 days); however, a considerable effect of the baffling was observed at the lower detention times. At a hydraulic detention time of 1.5 days the percent carbon removal was 53, 60, 62, and 70 percent for …
Effects Of Temperature On The Toxicity To The Aquatic Biota Of Waste Discharges - A Compilation Of The Literature, E. Joe Middlebrooks, M. J. Gaspar, R. D. Gaspar, J. H. Reynolds, Donald B. Porcella
Effects Of Temperature On The Toxicity To The Aquatic Biota Of Waste Discharges - A Compilation Of The Literature, E. Joe Middlebrooks, M. J. Gaspar, R. D. Gaspar, J. H. Reynolds, Donald B. Porcella
Reports
An extensive compiliation and general evaluation of the literature is presented which describes the temperature interaction with toxicity. Recent literature is summarized and made accessible along with a few generalized relationships such that researchers may design studies in a manner that will increase the utility of their results. A detailed indexing system is employed which makes the information contained in the report accessible by author, toxicant, and text organism. Summary tables of the most pertinent literature are also presented for easy subject retrieval. It was concluded that very little uniformity in experimental design is found between experiments on temperature-toxicity relationships, …
Modeling The Eutrophication Process: Workshop Proceedings, P. H. Mcgauhey, E. B. Welch, C. A. Rock, J. D. Krull, D. P. Larsen, H. T. Mercier, K. W. Malueg, D. D. Huff, J. F. Koonce, W. R. Ivarson, P. R. Weiler, E. H. Dettmann, R. F. Harris, G. D. Cooke
Modeling The Eutrophication Process: Workshop Proceedings, P. H. Mcgauhey, E. B. Welch, C. A. Rock, J. D. Krull, D. P. Larsen, H. T. Mercier, K. W. Malueg, D. D. Huff, J. F. Koonce, W. R. Ivarson, P. R. Weiler, E. H. Dettmann, R. F. Harris, G. D. Cooke
Reports
No abstract provided.
Bibliography Of Latin American Agricultural Production And Development. Volume I: Inputs And Outputs In Crop And Livestock Production, Allen Lebaron, Samuel Daines, Percy Aitken, Ruby Johnson, Angeles Ely
Bibliography Of Latin American Agricultural Production And Development. Volume I: Inputs And Outputs In Crop And Livestock Production, Allen Lebaron, Samuel Daines, Percy Aitken, Ruby Johnson, Angeles Ely
Reports
No abstract provided.
Bibliography Of Latin American Agricultural Production And Development. Volume Ii: General Agricultural Planning, Background, And Statistical Studies, Allen Lebaron, Samuel Daines, Percy Aitken, Ruby Johnson, Angeles Ely
Bibliography Of Latin American Agricultural Production And Development. Volume Ii: General Agricultural Planning, Background, And Statistical Studies, Allen Lebaron, Samuel Daines, Percy Aitken, Ruby Johnson, Angeles Ely
Reports
No abstract provided.