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1976

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Articles 391 - 398 of 398

Full-Text Articles in Engineering

Individual Residential Wastewater Treatment, Robert H. Mcneal Jan 1976

Individual Residential Wastewater Treatment, Robert H. Mcneal

Retrospective Theses and Dissertations

No abstract provided.

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The Effects Of Altered Traffic Signs Upon Vehicular Driving Modes And Consequent Fuel Conservation And Environmental Benefits, As Measured By Vehicular Noise-Imprints, Mark Daniel Pfarrer Jan 1976

The Effects Of Altered Traffic Signs Upon Vehicular Driving Modes And Consequent Fuel Conservation And Environmental Benefits, As Measured By Vehicular Noise-Imprints, Mark Daniel Pfarrer

Retrospective Theses and Dissertations

The hypothesis is that the recorded noise-imprints of a vehicle at an intersection can be used to identify and accurately time the driving modes of deceleration, idle, slow cruise, and acceleration. This is proven by analyzing and comparing noise-imprints of vehicles at an uncontrolled intersection marked first with a "stop" sign, and then by a "yield" and an experimental "dead slow" sign. By relating the duration of each driving mode to known relations, the overall efficiency of an intersection can be characterized. A new technique for studying various types of traffic conditions at intersections is the result. Initial noise-imprint analysis …

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Plotting Frequency Response With The Hybrid Computer, David Kenneth Swartwood Jan 1976

Plotting Frequency Response With The Hybrid Computer, David Kenneth Swartwood

Retrospective Theses and Dissertations

This paper describes a hybrid computer microprogram which plots frequency domain responses for linear systems. The microprogram computes the real and imaginary parts of the system output and displays either Bode or Nyquist plots. Various approaches are discussed and a detailed explanation of the one selected is presented. The major areas of discussion are the sinewave generator, the computation of real and imaginary parts of the system output, the logarithm computation and the digital control logic. The conclusion give s comparison of a Nyquist plot made with the microprogram with one calculated by a digital computer. Possible improvements for the …

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An Industrial Wastewater Treatment Review For The Textile And Pulp And Paper Industries Of Srilanka, Kolonne A. Wijeratne Jan 1976

An Industrial Wastewater Treatment Review For The Textile And Pulp And Paper Industries Of Srilanka, Kolonne A. Wijeratne

Retrospective Theses and Dissertations

A legislative authority empowered to protect Srilanka's environment, operating similarly to the Environmental Protection Agency of the U.S., is needed, along with wastewater treatment. Wastewater parameters of importance in treatment are BOD, COD, total suspended solids, settleable solids, pH, colour, turbidity, ammonia or nitrate nitrogen, heavy metals, sulfides, phosphates, and phenols. Methods of industrial waste treatment vary depending on the climatic conditions, the industry, raw materials, and process adopted. Textile and pulp and paper industries exist in Srilanka and have very high pollution potential. Methods of treatment to finally generate reasonably good quality effluent are available. Processing of effluents from …

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Morphological Studies Of Semicrystalline Poly(2, 6-Dimethylphenylene Oxide), William Macknight, W. Wenig, R. Hammel, F. E. Karasz Dec 1975

Morphological Studies Of Semicrystalline Poly(2, 6-Dimethylphenylene Oxide), William Macknight, W. Wenig, R. Hammel, F. E. Karasz

William MacKnight

A sample of poly(2,6-dimethylphenylene oxide) (PPO) has been crystallized by exposure to 2-buta­none (MEK) vapor. This sample has been investigated by wide and small angle x-ray scattering (WAXS and SAXS), differential scanning calorimetry (DSC), and light-scattering techniques. The WAXS and DSC experi­ments reveal a maximum crystallinity of about 30%. The SAXS, analyzed according to the linear paracrystal model of Hosemann, indicates a high degree of order in the superlattice with an average crystal lamellar thickness of 38 A. Extensive peak broadening occurs in the W AXS curve arising from crystal lattice distortions or defects. These dis­tortions or defects most probably …

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Thermally Stimulated Discharge In Polymer Electrets: Compatibility And Impurity Effects, William Macknight, P. Alexandrovich, F. E. Karasz Dec 1975

Thermally Stimulated Discharge In Polymer Electrets: Compatibility And Impurity Effects, William Macknight, P. Alexandrovich, F. E. Karasz

William MacKnight

Polymer electrets have been prepared and studied by measuring thermally stimulated discharge currents, Two current maxima have been observed for samples of polystyrene, poly(p-chlorostyrene), and a random copolymer of styrene and p-chlorostyrene, These maxima are attributed to dipole reorientation· accompanying the glass transition and to real charge drifts. Poly(2,6 dimethyl-1,4-phenylene oxide) and blends of this polymer with the three aforementioned polymers were also studied. In these systems unresolved and nonreproducible peaks were obtained, and these difficulties have been attributed to impurities present. 

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Rheological Properties Of Partially Hydrolyzed Ethylene-Vinyl Acetate Copolymers, William Macknight, Mihailo Jacovic, Muneki Yamada, Roger S. Porter Dec 1975

Rheological Properties Of Partially Hydrolyzed Ethylene-Vinyl Acetate Copolymers, William Macknight, Mihailo Jacovic, Muneki Yamada, Roger S. Porter

William MacKnight

No abstract provided.

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Dynamic Mechanical Properties Of Polypentenamers With Pendant Ionic Groups And Their Hydrogenated Derivatives, William Macknight, K. Sanui Dec 1975

Dynamic Mechanical Properties Of Polypentenamers With Pendant Ionic Groups And Their Hydrogenated Derivatives, William Macknight, K. Sanui

William MacKnight

No abstract provided.

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