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The Flow of Gases in Narrow Channels

Description: Measurements were made of the flow of gases through various narrow channels a few microns wide at average pressures from 0.00003 to 40 cm. Hg. The flow rate, defined as the product of pressure and volume rate of flow at unit pressure difference, first decreased linearly with decrease in mean pressure in the channel, in agreement with laminar-flow theory, reached a minimum when the mean path length was approximately equal to the channel width, and then increased to a constant value. The product of flow rate and square root of molecular number was approximately the same function of mean path length for all gases for a given channel.
Date: August 1951
Creator: Rasmussen, R. E. H.
Partner: UNT Libraries Government Documents Department

Supersonic Flow With Whirl and Vorticity in Axisymmetric Channels

Description: Note presenting the axially symmetric supersonic steady flow treated for a nonviscous fluid flowing with whirl component between two arbitrary coaxial surfaces of revolution. The equations that describe the motion are expressed in characteristic coordinates and in this form are used to determine the meridional velocities for arbitrary distributions of the tangential velocity components.
Date: August 1952
Creator: Eschborn, Ralph J.
Partner: UNT Libraries Government Documents Department

Conversion of Energy in Cross-Sectional Divergences Under Different Conditions of Inflow

Description: "This investigation treats the conversion of energy in conically divergent channels with constant opening ratio and half included angle of from 2.6 to 90 degrees, the velocity distribution in the entrance section being varied from rectangular distribution to fully developed turbulence by changing the length of the approach. The energy conversion is not completed in the exit section of the diffuser; complete conversion requires a discharge length which depends upon the included angle and the velocity distribution in the entrance section. Lastly, a spiral fan was mounted in the extreme length and the effect of the spiral flow on the energy conversion in the cross-sectional divergence explored" (p. 1).
Date: March 1934
Creator: Peters, H.
Partner: UNT Libraries Government Documents Department

Application of the Analogy Between Water Flow With a Free Surface and Two-Dimensional Compressible Gas Flow

Description: From Introduction: "The development of the measuring apparatus and techniques is presented herein. The application of the analogy to flows through nozzles and about circular cylinders at subsonic velocities extending into supercritical range is also presented."
Date: February 1947
Creator: Orlin, W. James; Lindner, Norman J. & Bitterly, Jack G.
Partner: UNT Libraries Government Documents Department

Antecedents of Power in the Distribution Channel : A Transaction-cost Perspective

Description: A discussion of reward, coercive, expert, legitimate, and referent power bases was the initial focus of this research. A review of the power sources literature suggested that vertical integration within a channel of distribution was a crucial precursor to develop a structure to facilitate the use of power without creating a significant conflict among channel participants. Elements of transaction cost analysis (TCA) were offered as being suitable for determining the existing level of vertical integration among respondent firms. Accordingly, the purpose of this study was to develop a tentative model to determine proper use of power within varying levels of vertical integration.
Date: August 1991
Creator: Erdem, S. Altan (Selim Altan)
Partner: UNT Libraries

The design, operation, and uses of the water channel as an instrument for the investigation of compressible-flow phenomena

Description: Report presenting the results of several years of experience of operation of a small water channel, which has shown that the hydraulic analogy can be used successfully to demonstrate many two-dimensional compressible-flow phenomena.
Date: January 1950
Creator: Matthews, Clarence W.
Partner: UNT Libraries Government Documents Department

Elastic properties of channels with unflanged lightening holes

Description: Report presenting testing of fifty-eight lightened and five unlightened aluminum-alloy channels as simply supported beams in pure or simple bending produced by loads parallel to the plane of symmetry, and fifty-three lightened and four unlightened aluminum-alloy channels with loads parallel to the back. Four types of testing occurred with various types of support and loading.
Date: March 1944
Creator: Niles, Alfred S.
Partner: UNT Libraries Government Documents Department

Retrogressive Failures in Sand Deposits of the Mississippi River, Report 1: Field Investigations, Laboratory Studies and Analysis of the Hypothesized Failure Mechanism

Description: First report regarding geotechnical field investigations meant to apply current state-of-the-art knowledge and methods to assessing the in situ characteristics of susceptible point bar deposits below Baton Rouge.
Date: June 1988
Creator: Torrey, Victor H., III; Dunbar, Joseph B. & Peterson, Richard W.
Partner: UNT Libraries Government Documents Department

Model Study of Channel Improvement and Stabilization in the Pryors Island Reach of the Ohio River

Description: This technical memorandum constitutes a complete report on a model study of the Pryors Island reach of the Ohio River, made for the purpose of determining the most effective plan of regulating works for the further improvement and stabilization of the navigable channel.
Date: September 1, 1938
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department

Model Study of Plans for Channel Improvement at Dogtooth Bend, Mississippi River, Folder 1

Description: This memorandum, constitutes a report on the results of experiments conducted at the U. S. Waterways Experiment Station on a small scale model of that reach of the Mississippi River near and including Dogtooth Bend (Mile 32.7 above to Mile 4.0 below Cairo).
Date: April 2, 1938
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department

Retrogressive Failures in Sand Deposits of the Mississippi River, Report 2: Empirical Evidence in Support of the Hypothesized Failure Mechanism and Development of the Levee Safety Flow Slide Monitoring System

Description: This report represents a continuation of efforts by the Lower Mississippi Valley Division (LMVD), US Army Corps of Engineers, to develop an effective plan for and means of protecting the integrity of main line Mississippi River levees from the threat of flow slides in sand deposits.
Date: June 1988
Creator: Torrey, Victor H., III
Partner: UNT Libraries Government Documents Department

Streamflows and Channels of the Green River Basin, Wyoming

Description: From introduction: One purpose of this study was to describe streamflows of the Green River and its tributaries. In addition to describing the cause and occurrence of streamflows in the study area, a brief discussion of how streamflow data are collected and summarized is presented as background information to users of this report who may be unfamiliar with streamflow measurement. The second and primary purpose of this study was to describe hydraulic characteristics of streams in the study area.
Date: May 1982
Creator: Lowham, H. W.
Partner: UNT Libraries Government Documents Department

Combined Beam-Column Stresses of Aluminum-Alloy Channel Sections

Description: "The results of tests of 65 specimens of aluminum-alloy channel sections are graphed for stresses due to axial and bending loads as functions of the ratio of length of specimen to its radius of gyration, and from these data a suggested design chart is derived that is suitable for ready use" (p. 1).
Date: September 1941
Creator: Hutton, J. O.
Partner: UNT Libraries Government Documents Department

A Description and Analysis of the Channels of Distribution in the Cotton Textile Industry of India

Description: The channels of distribution of the Indian Cotton Textile Industry present an interesting problem of economic development in a mixed economy where private and public corporations cooperate to achieve national objectives. This study was designed to describe and analyze the channels of distribution of cotton textiles in India, to specify the shortcomings that exist in the present distribution system, and to make recommendations to improve the efficiency of cotton textile distribution in India. There are always problems involved in collecting primary and even secondary data from a developing country like India. Therefore, mainly a comprehensive library research was conducted pertaining to the Indian Cotton Textile Industry and its distribution system. The secondary sources were published government reports, documents, monographs, books, articles, and trade associations reports.
Date: May 1981
Creator: Panigrahi, Bhagaban
Partner: UNT Libraries

Physical Hydraulic Models: Assessment of Predictive Capabilities; Report 1: Hydrodynamics of the Delaware River Estuary Model

Description: Partial abstract: The purpose of this study is to define the reliability with which results of tests conducted in a physical model of the Delaware River Estuary can be used to predict the effects of modifications to the estuary. The Delaware River model at the Waterways Experiment Station was used to conduct tests to predict the effects of the navigation channel enlargement between Philadelphia and Trenton, and the results of the tests are compared with subsequent prototype data to determine the accuracy of the model predictions.
Date: June 1975
Creator: Letter, Joseph V., Jr. & McAnally, William H., Jr.
Partner: UNT Libraries Government Documents Department

Model Study of Galveston Harbor Entrance, Texas: Hydraulic Model Investigation

Description: Report discussing the results of a series of tests in Galveston Bay to: "(a) develop plans for relocation and stabilization of the jetty channel on an alignment and at a depth suitable fro the safe passage of supertankers; (b) determine means for protecting the north jetty from the undermining action of tidal currents; (c) determine the shoaling characteristics of the relocated and deepened jetty (inner bar) channel and develop plans for minimizing shoaling in the relocated channel; and (d) determine the best locations for additional anchorage areas adjacent to the jetty channel or in Bolivar Roads" (p. ix).
Date: February 1969
Creator: Simmons, Henry B. & Boland, Robert A.
Partner: UNT Libraries Government Documents Department

Construction of a Sea-Level, Transisthmian Canal Using Nuclear Explosives

Description: Partial abstract: "This report is based: (1) on information developed in earlier high explosive experiments which determined the optimum spacing and burial depth of charges in a row to produce a channel uniformly wide and deep, and (2) on the Sedan and Danny Boy experiments, which provided data on dimensions of nuclear craters in both soil and basalt rock. This information has been combined with the 1947 route surveys of the Panama Canal company, and estimates have been made not only of the number and yield of nuclear explosives required to excavate a Transisthmian canal with nuclear explosives, but also of the cost of the explosives and the cost of their replacement."
Date: February 1964
Creator: Vortman, Luke J.
Partner: UNT Libraries Government Documents Department

Columbia River Estuary Hybrid Model Studies: Report 1, Verification of Hybrid Modeling of the Columbia River Mouth

Description: From abstract: The Columbia Hybrid Modeling System was applied to the mouth of the Columbia River estuary to evaluate alternatives for reducing navigation channel maintenance dredging.
Date: September 1983
Creator: McAnally, William H., Jr.; Brogdon, Noble J., Jr.; Letter, Joseph V., Jr.; Stewart, J. Phillip & Thomas, William A.
Partner: UNT Libraries Government Documents Department

Baltimore Harbor and Channels Deepening Study: Chesapeake Bay Hydraulic Model Investigation

Description: From abstract: Tests on the Chesapeake Bay hydraulic model were conducted to specifically investigate possible changes in the hydrodynamic characteristics of velocity, salinity, and tidal elevations associated with the proposed channel enlargements.
Date: February 1982
Creator: Granat, Mitchell A. & Gulbrandsen, Leif F.
Partner: UNT Libraries Government Documents Department

The Effects of Hearsee/Say and Hearsee/Write on Acquisition, Generalization and Retention.

Description: This study examines the effects of training in two yoked learning channels (hearsee/say and hearsee/write) on the acquisition, generalization and retention of learning. Four fifth-grade participants were taught the lower-case letters of the Greek alphabet. Twelve letters were taught in the hearsee/say channel and twelve letters taught in the hearsee/write channel for equal amounts of time. The see/say channel reached higher frequencies at the end of training and showed higher acquisition celerations than the see/write channel. However, the see/write channel showed higher accuracy and retention than the see/say channel. The see/write channel also showed greater generalization across learning channels including the see/say, think/say, think/write and see-name/draw-symbol.
Date: May 2001
Creator: Zanatta, Laraine Theresa
Partner: UNT Libraries