Engineering Commons^™

An Investigation Of The Dynamic Response Of The Activated Sludge Process, Tin-Bai Pan

Dissertations

A new mathematical model, derived from first principles of mass balance, is proposed for describing the mass transfer response of an activated sludge aeration tank in terms of a fluidized bed. The operational data to verify the proposed model were taken from an existing conventional wastewater treatment plant and a bench scale pilot plant.

The mass transfer rate, (K_dA_s), was presented by an empirical dimensionless group function as follows:

((K_dA_s)D_p/D_v) = fA_c (uD_p/ν)a ((ν/D_ν)(MLSS))^b

Or

Sh = f(A_c/A_s ) …

Bevolute Gear System, Willis M. Carter

Mechanical Engineering Faculty Patents

The present invention relates to a bevolute gearing system which transmits torque between non-intersecting shafts at right angles to each other. The bevolute gear system includes a pinion gear which is flat and in one plane. The pinion gear is designed to include teeth which are shaped in the form of an involute spiral. The bevolute gear system includes a second gear which is also designed to include teeth which are shaped in the form of an involute spiral. The second gear is mounted on a non-intersecting axis at a right angle to the axis of the pinion gear. The …

Ar 10-50, Organization And Functions, United States Army Medical Intelligence And Information Agency, 15 December 1980., Us Army, Robert Bolin , Depositor

Department of Defense Military Intelligence

The purpose of the regulation is described as setting “… forth the mission and functions of the Director, US Army Medical Intelligence and Information Agency (USMIIA)…”

The mission of the USMIIA…”is to produce timely medical intelligence support to the following:

• Offices of The Surgeons General, major commands, and staffs of the Army, Navy, and Air Force.
• DOD [Department of Defense] and national level intelligence production agencies.
• Other Government agencies as required.

[and] Administer and coordinate the medical aspects of the Army Foreign Materiel Exploitation Program. “ This regulation states more clearly than the 1975 edition, that the USMIIA provided medical …

Love, Death And The Hexadecimal, Roger A. Lohmann

Faculty & Staff Scholarship

This paper analyzes the role of information in social casework practice. Three models of computer-based information processing are discussed: Cybernetic, Management Information Systems and Natural Language Processing. The latter is most consistent with social casework information needs because of its potential to focus on the problems of the meaning of social action.

X-Ray Induced Electron Emission, Charles A. Aeby

Chemical and Biological Engineering ETDs

An experimental technique has been developed and successfully used in the measurement of X-Ray induced electron emission from a variety of materials including a group of significance to satellite applications. A database has been established which extends measure emission characteristics to an order of magnitude lower energies than previously available.

How Does Retroslim Forskolin Works?, Nicolel Bell

Retroslim Forskolin

Centers Of Polymer Research; Polymer Science In Silesia, Poland:Gliwice, Zabrze, Otto Vogl, W. Pradellok

Emeritus Faculty Author Gallery

No abstract provided.

Centers Of Polymer Research; Polymer Science In Silesia, Poland:Gliwice, Zabrze, Otto Vogl, W. Pradellok

Otto Vogl

No abstract provided.

H & V News

Building Services Engineering

No abstract provided.

The Inert Gas Effect On The Rate Of Evaporation Of Zinc And Cadmium, P. C.S. Wu, Thomas J. O'Keefe, Fred Kisslinger

Materials Science and Engineering Faculty Research & Creative Works

An experimental study has been made to investigate the effect of argon and helium on the rate of evaporation of zinc and cadmium under one atmosphere pressure at temperatures ranging from 500 to 850°C. The experimental results were compared with the maximum rates calculated using the effusion formula as well as with values obtained using two different types of equations based on kinetic theory, diffusion theory, and empirical data. Equations have been derived for expressing the rate of evaporation of zinc and cadmium in both argon and helium as functions of temperature of the liquid zinc and cadmium. It was …

Frictional Performance Of Pavements And Estimates Of Accident Probability [Dec. 1980], James L. Burchett, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

Objectives of this study were to evaluate standard and experimental surfaces throughout Kentucky in terms of skid resistance and effects of traffic, and to provide criteria for judging suitability of these surfaces to satisfy requirements for skid resistance and economics. The effects of traffic were quantified by regression analysis and scatter of data. Criteria included an estimate of accident risks, effects of speed on skid resistance, and seasonal variations in skid resistance.

Pavements on low volume roads (less than 1,000 vehicles per day) maintained adequate skid resistances. Open-graded friction courses, with the possible exception of sections using phosphate slag aggregate, …

Sound Absorption In N2-H2O Gas Mixtures At Elevated Temperatures, Roger W. Meredith

Physics Theses & Dissertations

Sound absorption measurements were conducted in N₂ -H₂O gas mixtures at 297, 343, and 387 Kelvin to determine the location of the vibrational relaxation peak of nitrogen on the frequency/pressure, (f/P), axis as a function of humidity and temperature. At low humidities the best fit of the data is to a linear relationship between (f/P)_max and humidity (h) yields a slope of 1 .84 X 10⁴ Hz/ atm mole fraction at all three temperatures. The slope is the same as that reported by Zuckerwar and Griffin (2.00 X 10⁴ Hz/atm mole fraction) but is …

High Resolution Laser Absorption Spectroscopy Of Ozone Near 1129.4 Cm-1, Lawrence N. Majorana

Physics Theses & Dissertations

A Beer's Law experiment was performed with a tunable laser to determine self broadened line shape parameters of one infrared absorption ozone line in the v1 band for ten pressures from 0.26 to 6.29 Torr at 285K. SO₂ line positions were used for wavelength calibration. Line shapes were iteratively fitted to the Voigt function at a Doppler width of 29.54 MHz (HWHM) resulting in values for the integrated line• strength, ( S), of (0.144 +/- 0.007 ) x ·10^-20 cm-1/molecule cm-2, line center frequency, (υ_ο) of 1129.426 cm-1 and the Lorentzian contributions to half width, (α …

A Transient, One-Dimensional, Discrete-Element Transport Model For Predicting Hydrodynamic Conditions And Three-Layer Non-Equilibrium Pollutant Concentrations As Dissolved In Water And As Adsorbed On Different Classes Of Sediment In Controlled Rivers And Tidal Estuaries, Gary W. Zimmerman

Masters Theses

A transient one-dimensional mathematical model for simulating the transport of pollutant effluents from industrial plants is presented.

The Eulerion fluid-in-discrete-element (FLIDE) formulation employs the integral forms of the conservation principles of water mass, sediment mass, and pollutant mass in variable size discrete elements that span the flow region. The transport of the pollutant effluents are modeled as dissolved and adsorbed suspended sediment in the suspended sediment and slurry sediment layer and as dissolved and stationary resident sediment in the resident sediment layer.

The contributions of vertical variations of the velocity components and pollutant concentrations in the suspended sediment and slurry …

A Study Of The Models Describing Fines And Filler Retention By Utilizing Cationic Starch As The Retention Aid, Nen-Sen Chen

Masters Theses

Fines and filler retention under dynamic conditions was studied in this thesis work. Zeta potential of samples are also measured. Dynamic Retention/Drainage Jar and Lazer-Zee Meter were used to accomplish this work. The results have been analyzed by statistical methods. When cationic starch was utilized as a retention aid the pH affected its efficiency, probably because the charge of cationic starch was dependent on pH. This effect was detected by utilizing two-way analysis of variance to find the sources of its interactions with molecular weight and agitation rate. The mechanism was thus determined. At pH 3 and 4, charge neutralization …

Fifth International Specialty Conference On Cold-Formed Steel Structures, University Of Missouri--Rolla

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

This document contains the beginning pages of the Proceedings of the Fifth International Specialty Conference on Cold-Formed Steel Structures:

• Cover
• Title page
• Conference Sponsors, Directors, Planning Committee
• Table of Contents
• Preface
• Program
• AISI's Cold-Formed Steel Design Specification - Recent Changes

The Performance Of Crossed-Vane Swirl Meters, H. L. Lee, William W. Durgin

Office of the Provost Scholarship

Vortimeters consisting of vanes rotating about pipe axes are frequently used to indicate the swirl present in pump columns and feedlines from sumps and in piping networks. Since the design of such devices varies widely, the study described herein was undertaken to identify salient design parameters and to evaluate a device designed according to information available in the literature.

An apparatus which could produce known amounts of angular momentum in a pipeline was verified by direct measurement of axial and tangential velocity profiles. By using the assumption that a vortimeter, with vanes spanning only the rotational core, responded to an …

Polymer Science In Lodz, Poland, Otto Vogl, P. Kubisa

Emeritus Faculty Author Gallery

No abstract provided.

Interstate Safety Improvement Program, Jerry G. Pigman, Kenneth R. Agent, Charles V. Zegeer

Kentucky Transportation Center Research Report

The purpose of this paper was to prepare prioritized rankings of recommended improvements which could implemented for the Interstate Safety Improvement Program in Kentucky. Considerable detail is presented which documents analysis procedures used to determine sites, sections, and elements of the roadway in need of improvement. The average number of accidents per interchange, bridge, 1.6-km (1.0-mile) section, and 0.48-km (0.3-mile) spots were summarized for large urban, medium urban, and rural sections of the interstate system. At specified levels of statistical significance, critical numbers of accidents and critical accident rates were calculated to assist in identifying high-accident locations. A limited field …

Determination Of The Total Grain Size Distribution In A Vulcanian Eruption Column, And Its Implications To Stratospheric Aerosol Perturbation, P. J. Murrow, William I. Rose, S. Self

Department of Geological and Mining Engineering and Sciences Publications

Grain size analysis of samples representing all sampleable portions of the airfall deposit produced by the Fuego volcano in Guatemala on 14 October 1974 form the basis for estimating the total grain size distribution of tephra from this eruption. The region enclosed by each isopach has a particular average grain size distribution which can be weighted proportionally to its percentage volume. The grain size of pyroclastic avalanche deposits produced during the eruption are also included. The total grain size distribution calculated as a sum of weighted distributions has a median grain size of 0.8∅ (0.6mm) and a sorting coefficient (σ∅) …

Polymer Science In Lodz, Poland, Otto Vogl, P. Kubisa

Otto Vogl

No abstract provided.

H & V News

Building Services Engineering

No abstract provided.

Use Of Economic Analyses And Dynamic Programming In The Selection Of Projects For Resurfacing, Charles V. Zegeer, Kenneth R. Agent, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

The objective of this paper was to develop a dynamic programming procedure using economic analyses to assist in optimizing expenditures in pavement resurfacing programs. Benefit relationships were determined from expected accident reduction, improved comfort, time saving, fuel savings, and maintenance savings. The only cost input to the program was the resurfacing cost of each project.

Dynamic programming was adapted to the selection of projects for resurfacing in Kentucky. Over $8.4 million of additional user benefits would have been realized in 1976 if dynamic programming had been used in selecting projects. The benefit-cost ratio of sections selected for resurfacing by the …

An Abstract Model Of Unstratified Database System, Takayuki D. Kimura, Jerome R. Cox Jr., Will D. Gillett

All Computer Science and Engineering Research

A semantic data model is introduced with the following capabilities: (1) Abstraction mechanisms for aggregation, generalization and classification, (2) Unstratified control of the database content, (3) Refined control of intentional and extensional information, and (4) Extensive semantic consistency checking. The basic features of the model are illustrated through a scenario of interactions between the user and the database system (using the proposed model) for constructing a simple database on technical publications.

Light Gage Space Structures With Prestressing, Lev Zetlin

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

State Of The Art - Cylindrical Cold-Formed Steel Farm Structures, George Abdel-Sayed, Ching Fung, Frank Monasa

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Energy Considerations In Low-Rise Steel Buildings, Edward W. Machaj, Andrew S. Zakrzewksi

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Coating Effects Of Cold-Formed Steel Deck Slabs, Max L. Porter, C. E. Ekberg Jr.

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

The Design Of Adjustable Storage Shelves, J. Rhodes, William King, James M. Harvey

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Mechanical Interlocking Capacity Of Composite Slabs, R. M. Schuster, W. C. Ling

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.