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Missouri University of Science and Technology

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Articles 721 - 737 of 737

Full-Text Articles in Architectural Engineering

Vibration Coupling In Continuous Belt And Band Systems, C. D. Mote, W-Z Ben Wu Sep 1985

Vibration Coupling In Continuous Belt And Band Systems, C. D. Mote, W-Z Ben Wu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Small transverse oscillation of an endless band supported by wheels couples the response of the free spans of the band to oscillation of the wheels. The coupling arises from the finite curvature of the free spans of the band when its bending stiffness is finite. Significant modeling error can occur if a single span of the band is modeled as a simply supported, axially moving beam. The coupling provides an opportunity to dissipate vibration energy. Experiments and finite element analyses support the coupling discussion presented. © 1985 Academic Press Inc.

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Biofilm Growths With Sucrose As Substrate, Ju-Chang Huang, Shoou Yuh Chang, Yow Chyun Liu, Zhanpeng Jiang Jan 1985

Biofilm Growths With Sucrose As Substrate, Ju-Chang Huang, Shoou Yuh Chang, Yow Chyun Liu, Zhanpeng Jiang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study was conducted to: (1) Evaluate the effect of DO on cell yield in a fixed film reactor using 1,000 mg/L sucrose as a substrate; (2) evaluate the correlations of the biofilm thickness and density with DO and their resultant substrate stabilization rates; and (3) examine the response of biofilm communities as a result of DO and biofilm thickness changes. Data obtained from this study indicate that DO has only a minor effect on the cell yield. However, the thickness of aerobic biofilm is definitely related to DO, or thickness (mm) = (2.08 x DO)/(9.2 + DO). The biofilm …

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Length-Thermal Stress Relations For Composite Bridges, Jack H. Emanuel, Charles M. Taylor Jan 1985

Length-Thermal Stress Relations For Composite Bridges, Jack H. Emanuel, Charles M. Taylor

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Computer-assisted analysis was used to study the relation among uniform, linear, and nonlinear stress components thermally induced in a composite bridge section for hypothetical parameters of varying span lengths, number of spans, and support conditions, as well as for actual bridges. The results were verified by conventional methods of analysis. The following was concluded for prismatic (constant) sections: (1) For constant proportionality of span lengths, each of the three thermal stress components is independent of span length; (2) variation of the proportionality of span lengths affects only the linear stress component; (3) support reactions and deflections caused by thermal loading …

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Smemax? Caution!, Jerome A. Westphal Jan 1984

Smemax? Caution!, Jerome A. Westphal

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The SMEMAX Transformation was tested on samples generated from log-Pearson Type III and Gumbel Extreme Value Type 1 distributions. Although the transformation results in a distribution with a skew near zero, it is not a true normal distribution. The coefficients of kurtosis for the transformed distributions are always less than three and when the parent distribution approaches a reverse-J shape, the transformed distribution is bimodal. When the skew coefficient of the logarithms of events is -0.5 or greater for samples from the log-Pearson Type III distribution, the SMEMAX procedure underestimates the magnitude of events with return periods of 50 yr …

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A Stochastic Model For A Small-Time-Interval-Intermittent Hydrologic Process, Charles Darwin Morris Jan 1984

A Stochastic Model For A Small-Time-Interval-Intermittent Hydrologic Process, Charles Darwin Morris

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A methodology is developed for the generation of intermittent small-time-interval (15-min.) precipitation. This methodology consists of three components: a probabilistic wet-and-dry sequence component; a Markovian precipitation distribution component; and a regressive spatial-distribution component. The theory of stochastic hydrologic modeling is described and procedures by which this theory can be applied to a hydrologic time series are presented. In particular, the application of the procedures to small-time-interval-intermittent hydrologic processes is given. The methodology is demonstrated by application to an actual precipitation network, the Boneyard Creek raingage network in Champaign-Urbana, Illinois, U.S.A. The trend in frequency of precipitation amounts from the 89-yr. …

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Infiltration Formulas By Curve Number Procedure, Jerome A. Westphal Jan 1984

Infiltration Formulas By Curve Number Procedure, Jerome A. Westphal

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

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Geotechnical Evaluation Of The Support Of Coal Pillars In Underground Coal Mines., John D. Rockaway, Richard W. Stephenson Jan 1982

Geotechnical Evaluation Of The Support Of Coal Pillars In Underground Coal Mines., John D. Rockaway, Richard W. Stephenson

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Study Described Was Accomplished through an Investigation of Both the Intact and Insitu Geotechnical Properties of the Sub coal Strata and through the Installation of Floor Movement Monitoring Instrumentation. the Method of Bearing Capacity Analysis Developed by A. S. Vesic Was Used to Define Pillar Stability. This Method Includes Provisions for Taking into Consideration a Two-Layer System Such as Assumed for Mine Conditions Where a Weak Underclay overlies Firmer Strata.

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Energy Conservation: Impact On Indoor Air, Purush K. Terkonda Nov 1981

Energy Conservation: Impact On Indoor Air, Purush K. Terkonda

UMR-DNR Conference on Energy

No abstract provided.

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Coal, Energy And The Environment, Bobby G. Wixson, Betsy T. Kagey Nov 1981

Coal, Energy And The Environment, Bobby G. Wixson, Betsy T. Kagey

UMR-DNR Conference on Energy

No abstract provided.

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Cadmium In Forest Ecosystems Around Lead Smelters In Missouri, Nord L. Gale, Bobby G. Wixson Jan 1979

Cadmium In Forest Ecosystems Around Lead Smelters In Missouri, Nord L. Gale, Bobby G. Wixson

Biological Sciences Faculty Research & Creative Works

The development of Missouri's new lead belt within the past decade has provided an excellent opportunity to study the dissemination and effects of heavy metals in a deciduous forest ecosystem. Primary lead smelters, within the new lead belt have been identified as potential sources of cadmium as well as lead, zinc, and copper. Sintering and blast furnace operations tend to produce significant quantities of small particulates highly enriched in cadmium and other heavy metals. At one smelter, samples of stack particulate emissions indicate that as much as 0.21 lb of cadmium may be released to the atmosphere per hour. This …

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Ultrasonic Testing For Determining Dynamic Soil Moduli., R. W. Stephenson Jan 1978

Ultrasonic Testing For Determining Dynamic Soil Moduli., R. W. Stephenson

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Determination of Dynamic E- and G-Moduli of a Silty Clay Material Was Made by Measuring Directly the Velocity of Both Ultrasonic Longitudinal and Shear Waves Transmitted through the Material. the Equipment, developed at the University of Missouri-Rolla, Allows Dynamic, Nondestructive Testing of Soil Materials to Be Conducted Rapidly and Easily.

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Drinking Water Quality And Chronic Disease, Ernest Angino, Bobby G. Wixson, Ivan Smith Jul 1977

Drinking Water Quality And Chronic Disease, Ernest Angino, Bobby G. Wixson, Ivan Smith

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

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The New Lead Belt In The Forested Ozarks Of Missouri, Bobby G. Wixson, J. Charles Jennett Dec 1975

The New Lead Belt In The Forested Ozarks Of Missouri, Bobby G. Wixson, J. Charles Jennett

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

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Evaluating The Membrane Fecal Coliform Test By Using Escherichia Coli As The Indicator Organism, James B. Hufham Jan 1974

Evaluating The Membrane Fecal Coliform Test By Using Escherichia Coli As The Indicator Organism, James B. Hufham

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The fecal coliform membrane filter method (MFC) currently used in water pollution analysis was evaluated by using two strains of E. coli, a known fecal coliform, as th indicator organism. A large relative error in the results obtained with this method was found to be dependent upon the brand of membrane filter employed, the medium, and the temperature of incubation. MFC densities varied between 10 and 60% of the densities determined by means of total bacteria counts and total coliform counts performed at 35°C. Due to the large relative error encountered, the MFC method cannot be recommended as an analytical …

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Legendre Coefficients For Series Solution Of The Orientation Distribution Function For Ellipsoidal Macromolecules In Two-Dimensional Laminar Flow, Myrne R. Riley Jan 1973

Legendre Coefficients For Series Solution Of The Orientation Distribution Function For Ellipsoidal Macromolecules In Two-Dimensional Laminar Flow, Myrne R. Riley

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The double refraction and viscosity of a suspension of asymmetrical colloidal particles subject to continuous laminar flow vary with the orientation distribution of the suspended particles produced by the shearing field and Brownian motion. Recursion formulas are developed for the Legendre coefficients of the series solution of the orientation distribution function for a suspension subject to two-dimensional laminar flow, thus, extending the works of Peterlin, Wayland, and Scheraga. © 1973.

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Open-Channel Profiles By Newton's Iteration Technique, D. L. Fread, Terence E. Harbaugh Jan 1971

Open-Channel Profiles By Newton's Iteration Technique, D. L. Fread, Terence E. Harbaugh

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Computation of surface profiles for steady gradually varied flow can be accomplished by use of Newton's Iteration Technique. The magnitude of error is controlled and the profile depth can be conveniently calculated at selected distances upstream or downstream from a control point. A Fortran IV program is provided for utilizing the technique in a trapezoidal channel. © 1971.

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Sufficiency Conditions For Constrained Optima, Ju-Chang Huang, Robert M. Wellek Jan 1971

Sufficiency Conditions For Constrained Optima, Ju-Chang Huang, Robert M. Wellek

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Sufficiency conditions for constrained optimization problems were derived by the use of constrained second total derivatives. The results are in a simpler form than the Schechter and Beveridge relation. The sufficiency conditions of Phipps were corrected. © 1971, American Chemical Society. All rights reserved.

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