Digital Commons Network^™

A Ten Kilometer Transmission System Fiber Optics Versus Ku-Band, John A. Hallmark

Retrospective Theses and Dissertations

This research paper discusses the design evaluation and selection of a transmission system to be used in checking out the Spacelab high rate data system. The transmission systems evaluated are discussed, as well as the criteria utilized in selecting the final system. The installation of a fiber optics cable and the testing of this cable are discussed. The determination of the optimum location of the high rate data bit synchronizer and Viterbi decoder is presented. Utilization of this data to justify the installation of a shorter fiber optics system inside the O&C Building is presented.

Missouri National Recreational River Management Plan Gavins Point Dam, South Dakota, To Ponca State Park, Nebraska

United States Army Corps of Engineers, Omaha District

The Missouri River begins at Three Forks, Montana, and flows southeasterly for 2,300 miles before joining the Mississippi River a few miles north of St. Louis, Missouri.  It ranks as the second longest and is one of the most famous rivers in the United States.  It was the primary route of Lewis and Clark.  The river shared with the Oregon Trail and the Santa Fe Trail the distinction of being one of the three main throughfares to the Far West.  It was a wild and unpredictable river that carried millions of pounds of freight.

Waters of this mighty river are …

Doctor Of Arts In Information Science A Field-Based Program For Librarians And Information Managers, Nova University

College of Engineering and Computing Course Catalogs

No abstract provided.

The Influence Of Harvesting Strategies And Economic Constraints On The Feasibility Of Farm Grain Drying And Storage Facilities, Otto J. Loewer Jr., Thomas C. Bridges, G. M. White, Douglas G. Overhults

Biosystems and Agricultural Engineering Faculty Publications

The economic return to on-the-farm grain drying and storage facilities is influenced by many factors including harvesting strategies, facility management, market conditions, energy considerations, and facility design. This study evaluates the influence of these factors on expected net return.

Economic Comparison Of Alternative Burley Tobacco Harvesting Practices By Computer, Thomas C. Bridges, Larry G. Wells, George A. Duncan, John N. Walker

Biosystems and Agricultural Engineering Faculty Publications

The computer model CATCH (Computer Analysis of Tobacco Cutting and Housing) was developed to provide the individual tobacco producer with management information concerning alternative methods of harvesting burley tobacco. CATCH utilizes specific producer in-puts to analyze 24 alternative burley production systems and presents up to four economic rankings containing costs, equipment and labor for each system. The economic rankings aid the producer in decision making with regard to his own operation.

Fade Time Statistics Of Laser Light Propagating Through Turbulent Atmosphere, Madjid A. Belkerdid

Retrospective Theses and Dissertations

The average fade time of the fluctuations in the intensity of laser light propagation in the atmosphere is analyzed. Experimental results show that the average fade time for a propagation distance of 208 meters, in the weak turbulence regime, is well described by formulas developed from a Log-Normal distribution. A circuit that calculates real time statistics of fade time is designed, then validated using a sine wave input whose fade time statistics are predetermined. The experimental signal is then tested for stationarity, and the average fade time is measured. A curve fitting is then performed for the experimental data and …

Nominal Molecular Weight Distributions Of Color, Toc, Tthm, Precursors And Acid Strength In A Highly Organic Potable Water Source, Jalil Fouroozi

Retrospective Theses and Dissertations

This research investigated the relationships between molecular size and the TOC, TTHM, acid strength and color concentrations present in raw and coagulated water from Lake Washington. Three separate coagulants were utilized for investigation. There were: Al, Fe and Mg. Results indicated that the majority of the TOC, color and TTHM precursors were in the colloidal size range and removed by coagulation. The remaining TTHM precursors are mostly molecular and require a process other than coagulation for removal from the potable water before environmental standards are met.

Rubber Covered Rolls-The Nonlinear Elastic Problem, R. C. Batra

Mechanical and Aerospace Engineering Faculty Research & Creative Works

The problem of the indentation of a rubberlike layer bonded to a rigid cylinder and indented by another rigid cylinder is analyzed. The rubberlike layer is assumed to be made of a homogeneous Mooncy-Rivlin material. The materially and geometrically nonlinear problem is solved by using the finite-element code developed by the author. Results computed and presented graphically include the pressure profile at the contact surface, stress distribution at the bond surface and the deformed shape of the indented surface. © 1980 by ASME.

A Survey And Analysis Of Electrical Engineering Curricula In Communications And Signal Processing, Rodger E. Ziemer, William H. Tranter

Electrical and Computer Engineering Faculty Research & Creative Works

No abstract provided.

The Effect Of Shielded Metal Arc Welding Process Variables On Delta Ferrite Control In Austenitic Stainless Steel Weld Metal, Ralph Eldon Long

Dissertations and Theses @ UNI

This study was to determine the effects of shielded metal arc welding on delta ferrite in austenitic stainless steel weld metal. The two objectives of the study were to determine: (a) what variables of the SMAW process affect the delta ferrite content or Ferrite Number of austenitic stainless steel weld metal, and (b) to what extent the Ferrite Number is affected by SMAW variables.

The research design was experimental with data collected from mechanically produced weld metal using a magnetic instrument calibrated in Ferrite Numbers (FN). The electrode alloys tested were 308, 308L, 316L and 347. The sizes of electrodes …

Design And Analysis Of An Explosive Driven Hydrodynamic Conical Shock Tube, Leonard W. Connell

Retrospective Theses and Dissertations

An explosive driven, water filled, conical shock tube was designed and evaluated regarding its ability to amplify a charge weight and to produce hydrodynamic spherical shock waves. The results show that the shock waves in the tube are essentially spherical in nature--with an initial exponential shape, peak pressure attenuation as (1/R)1.13 and the time constant spreading roughly as (R).22. The charge weight was amplified by a factor of 3600 compared to a theoretical amplification of 7770. An estimate of the energy absorbed by the breach plug (which houses the charge) during an explosion was performed. The peak pressure data taken …

A Monte Carlo Approach To Ridge Discriminant Analysis, Lee Wooldridge

Retrospective Theses and Dissertations

A combined analytical and empirical method to define human performance measures is required for effective automated training. In theory, performance measures can be weighted and combined in a single first order equation upon which an automated training system can track a student's comparative skill level. A form of multivariate discriminant analysis was the statistical technique incorporated into the measurement selection and weighting scheme. (Vreuls and Wooldridge 1977). As with regression analysis, this discriminant technique was subject to debilitating problems such as overfit and undesirable inaccuracies in the coefficients. The author developed and implemented an adjustment to the discriminant function analogous …

County Road Management - Guidelines For Boards Of County Commissioners, Jean E. Hittle

Indiana Local Technical Assistance Program (LTAP) Publications

The purpose of these guidelines is to provide new County Commissioners in Indiana with a basic orientation of their duties and responsibilities in the management of county road systems. It is also a convenient reference to review.

Dynamic Intraesophageal Imagining Of The Heart With Ultrasound, N E. Fearnot, Charles F. Babbs, J D. Bourland, L A. Geddes

Weldon School of Biomedical Engineering Faculty Publications

Real-time images of the heart from within the esophagus are produced by a new intraesophageal ultrasonic sector scanner. Sixty images per second are displayed on a gray scale CRT in real-time and recorded on standard videotape for review. By interactive positioning of the esophageal probe, heart ventricles, atria, and valves can be visualized and their dynamics can be studied. The esophageal probe comprises four 5 MHz PZT-5 piezoelements of 6.35 mm diameter, mounted on a shaft that rotates at 900 rpm. The piezoelements are pulsed at a 5 kHz rate and the echoes are processed electronically.

Brochure: John Deere Waterloo Works, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Phase 1 Inspection Report: National Dam Safety Program. Mississippi -St. Francis Basin. Nims Lake Dam, Washington County, Missouri, Woodward-Clyde Consultants, Chicago, Illinois

Missouri Dam Safety Inspection Reports

This report presents the results of field inspection and evaluation of Nims Lake Dam, Missouri Inventory Number 30064.

It was prepared under the National Program of Inspection of Non-Federal Dams.

This dam has been classified as unsafe, non-emergency by the St. Louis District as a result of the application of the following criteria:

a. Spillway will not pass 50 percent of the Probable Maximum Flood without overtopping the dam.

b. Overtopping of the dam could result in failure of the dam.

c. Dam failure significantly increases the hazard to loss of life downstream.

Phase 1 Inspection Report: National Dam Safety Program. Mississippi - Kaskaskia - St. Louis Basin. St. Joe State Park Dam, St. Francois County, Missouri, International Engineering Company, Inc. Consulting Engineers, San Francisco, California

Missouri Dam Safety Inspection Reports

This report presents the results of field inspection and evaluation of St. Joe State Park Dam (MO 30277):

It was prepared under the National Program of Inspection of Non-Federal Dams.

This dam has been classified as unsafe, non-emergency by the St. Louis District as a result of the application of the following criteria:

a. The original dam of St. Joe State Park Dam, which has no spillway, will retain less than one-half the Probable Maximum Flood without the original dam being overtopped.

b. Overtopping could result in failure of the original dam.

c. Dam failure significantly increased the hazard to …

Finite Element Model Of A Timoshenko Beam With Structural Damping, Louis Ablen Roussos

Mechanical & Aerospace Engineering Theses & Dissertations

A numerical integration technique, a modified version of the Newmark method, is applied to transient motion problems of systems with mass, stiffness, and small nonlinear damping. The nonlinearity is cast as a pseudo-force to avoid repeated recalculation and decomposition of the effective stiffness matrix; thus, the solution technique is dubbed the "pseudo-force Newmark method." Comparisons with exact and perturbation solutions in single-degree-of-freedom problems and with a Gear-method numerical solution in a cantilevered Timoshenko beam finite element problem show the solution technique to be efficient, accurate, and, thus, feasible provided the nonlinear damping is small. As a preliminary step into the …

Final Environmental Impact Statement Missouri National Recreational River Nebraska And South Dakota

United States Army Corps of Engineers, Omaha District

The Missouri River from Gavins Point Dam to Ponca State Park, Nebraska, is one of the few remaining relatively natural, braided reaches of the Missouri River. The Corps of Engineers and the Heritage, Conservation, and Recreation Service have investigated public concerns related to streambank erosion control and recreational development along this river reach. Two plans were initially considered and one was selected for detailed study. The selected plan consists of development of the river reach as a recreation river under the Wild and Scenic Rivers Act. This plan would meet all streambank erosion control and recreational development needs and would …

Calcium Migration In Dense Alumina Aged In Water And Physiological Media, Heidi H. Osterholm

Masters Theses

"The flexural strength and relative Ca concentration at the external surface were measured for a dense alumina aged in deionized water and Ringer's solution at 40⁰C for 60 weeks and at 80⁰C for 45 weeks. Changes in the Ca concentration at the external surface and flexural strength during aging were attributed to the dissolution of the calcium impurity believed to be present in a glass phase of unknown composition. Auger electron spectroscopy was used to investigate the relative concentration of the calcium impurity at the external and fracture surfaces of a dense alumina after in vivo exposure for 6, 12 …

Use Of Saline Water In Energy Development, C. Earl Israelsen, V. Dean Adams, J. Clair Batty, Dennis B. George

Reports

Maps were made of the Upper Colorado River Basin showing locations of coal deposits, oil and gas, oil shale, uranium, and tar sand, in relationship to cities and towns in the area. Superimposed on these are locations of wells showing four ranges of water quality; 1,000-3,000 mg/l, 3,000-10,000 mg/l, 10,000-35,000 mg/l, and over 35,000 mg/l. Information was assembled relative to future energy-related projects in the upper basin, and estimates were made of their anticipated water needs. Using computer models, various options were tested for using saline water for coal-fired power plant cooling. Both cooling towers and brine evaporation ponds were …

Bicycle-Motor Vehicle Accidents In Kentucky, Kenneth R. Agent, Charles V. Zegeer, Robert C. Deen

Kentucky Transportation Center Research Report

The purpose of this study was to determine the characteristics associated with bicycle related, motor-vehicle accidents in Kentucky. It was found that cyclists 10 to 14 years of age were involved in the largest number of motor-vehicle related accidents. Males were involved in four times as many accidents a s females. Most accidents occurred in urban areas, mostly on residential streets. The majority of accidents resulted from errors by the cyclists. The most common type was the right-angle accident, but the leading types varied with cyclist's age. Several factors were related to age and accident severity. The accidents were summarized …

Thermosiphon System, Florida Solar Energy Center

FSEC Energy Research Center®

In a THERMOSIPHON SYSTEM, cold water from the bottom of the elevated storage tank flows to the lowest point in the system (which is the bottom of the solar collector).

As it is warmed it becomes less dense and flows up to a side port near, but not at, the top of the storage tank. If the tank is about two feet above the top of the collector, the system will not back-siphon at night. If back-siphoning were to occur, the warm water would be cooled during its passage through the dormant collector. Thermosiphoning systems have no moving parts and …

7th Annual Umr-Dnr Conference On Energy -- Entire Proceedings, University Of Missouri--Rolla

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

No abstract provided.

Determination Of Contract Time Durations For Ishc Highway Construction Projects, James E. Rowings

JTRP Technical Reports

No abstract provided.

Evaluation Of Several Maintenance Methods For Continuously Reinforced Concrete Pavements, Eldon J. Yoder

JTRP Technical Reports

No abstract provided.

Traffic Speed Report No. 111 : Interim Report, Richard Philip Guenthner, George K. Stafford

JTRP Technical Reports

No abstract provided.

Traffic Speed Report No. 112 : Interim Report, Richard Philip Guenthner, George K. Stafford

JTRP Technical Reports

No abstract provided.

Evaluation Of Available Herbicides And Herbicide Mixtures For Control Of Brush And Milkweed Along Roadsides : Interim Report, D. James Morré

JTRP Technical Reports

No abstract provided.

Analysis Of Hardened Concrete For Admixture Content, William Lee Dolch

JTRP Technical Reports

No abstract provided.