Engineering Commons^™

Stress-Induced Infrared Frequency Shifts In Polyethylene, G. A. Pfeffer, D. W. Noid

United States Department of Energy: Publications

The molecular dynamics technique is used to study the spectral response of a polyethylene chain in a crystal environment under a mechanical deformation. The MUSIC method, which was previously shown to accurately compute dispersion curves from the time-dependent structure factor, is used. A complete characterization of frequency shifts is presented for various lamellar thickness, temperatures, stress (or pressure), and mass defects.

Stability Of Poiseuille-Couette Flow Between Concentric Cylinders, J H. Scholtz, Hendrik J. Viljoen, C J. Wright

Papers in Fluid Mechanics

The stability of laminar flow between concentric cylinders is analyzed. Conhinrd Poiseuille and Couette flows are considered. It is shown that instabilities exist if the laminar flow is synnetric or near-spaetric on part of the annulus. Instabilities are reported for aspect ratios as small as q = 0.001.

Major Project Management: The Yale Telecommunications Project

ACUTA: Other Publications

Back in the good old days, when the telephone business was simpler and Saturday night television was worth watching, I can remember Ted Knight the newsman (remember him on The Mary Tyler Moore Show?) looking off into some imagined horizon in the newsroom when asked how he happened to come to his current position. With head cocked upward and his hand clutching his right lapel, he'd start in his deepest, most pompous voice: “lt all started in a small, 5,000-watt radio station..." Around here it a!! started with a 12,000-line, decade-old Centrex system and a new hospital building going up …

Asymptotic Boundary-Layer Solutions For Mixed Convection From A Vertical Surface In A Micropolar Fluid, Rama Subba Reddy Gorla, Paul P. Lin, An-Jen J. Yang

Mechanical Engineering Faculty Publications

Using the theory of micropolar fluids due to Eringen, asymptotic boundary layer solutions are presented to study the combined convection from a vertical semi-infinite plate to a micropolar fluid. Consideration is given to the region close to the leading edge as well as the region far away from the leading edge. Numerical results are obtained for the velocity, angular velocity and temperature distribution. The missing wall values of the velocity, angular velocity and thermal functions are tabulated. Micropolar fluids display drag reduction and reduced surface heat transfer rate when compared to Newtonian fluids.

Design And Development Of A Photodegradable Bottle Cap, Kenneth S. Chon '87, Javier H. Idrovo '89, Donald S. Remer, Kenneth Pawlek '90, Kusha Janati '90

All HMC Faculty Publications and Research

The first photodegradable plastic cap for a glass beer bottle was developed and tested. The cap's design is the same as the current plastic, screw-on cap for soda bottles. A photodegradable resin was added to the soda cap plastic to make it photodegradable. Caps with 0%, 10%, and 25% photodegradable additive were made. Tests show that the photodegradable cap meets most of the physical properties required for a beer or a soda cap. A photodegradable cap with 10% degradable additive will cost about three times more than current metal crowns, but only about 10% more than current plastic soda caps. …

Enzyme- Facilitated Transport And Separation Of Organic Acids Through Liquid Membranes, David C. Rethwisch, Anuradha Subramanian, Gao Yi, Jonathan S. Dordick

Papers in Biotechnology

The selective separation of organic acids is important for the production of numerous biologially functional rnuleculcs, including amino acids, peptidcs, fats, and pharmaceuticals.' Enzyme, specificalty lipases and proteases, have been used to selectively separate a variety of organic acids; however, multiple steps are usually required,Vn additiun, carbonic anhydrase has been usd in a variety of Eiquid membranes for transport of CO2.) In the present study, we have coupled the selectiviey of enzymes with liquid membranes to provide a single-step method to scicctiveiy separate and purify organic acids.

Automated Sorting Of Oriented Tobacco Leaves, Larry G. Wells, M. J. Bader

Biosystems and Agricultural Engineering Faculty Publications

A mechanism has been developed which removes cured burley tobacco leaves from plants so that midribs are oriented parallel. A photosensor was utilized to count leaves as they were removed and a microprocessor determined the number of leaves allocated to each of three grades. Experiments indicated that 84% of leaves removed could be correctly sorted with a 2.4% material loss at an effective rate of approximately 2.4 times that of conventional methods.

Cost Comparison Of Timber, Steel, And Prestressed Concrete Bridges, Richard A. Behr, E. J. Cundy, C. H. Goodspeed

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study was undertaken to investigate the economics of timber bridge superstructures versus traditional steel/concrete and prestressed concrete alternatives in the short-span range of 20 to 60 ft (6.1-18.3 m). Only superstructure costs were considered because substructure and abutment costs are highly site-specific. A lack of definitive data regarding service lives and maintenance costs precluded a life-cycle cost study; thus, only initial costs were compared. Representative superstructure designs were obtained for timber, steel/concrete, and prestressed concrete bridges at 20-, 40-, and 60-ft spans. Five to six northern New England general contractors performed cost estimates on these designs. Also, nine timber …

Right To Farm, J. L. Taraba, R. M. Williams

Agricultural Engineering Extension Updates

Landowners in general have the right to use their property in any manner they might find useful or enjoyable except when that use infringes on the right of their neighbor or community to use their property. Conflicting interests of neighbors have been the subject of numerous disagreements resulting in one or the other loosing his right to use his property as he wishes. The circumstances surrounding each conflict usually determines the outcome, and farmers should be aware that their right to farm may be at the mercy of courts who have sometimes been sympathetic to grievances of their more urban …

Mixer Equipment Options For Total Mixed Rations, Larry W. Turner

Agricultural Engineering Extension Updates

The use of total mixed rations (TMR) in the dairy industry provides dairymen with the ability to feed a blended, balanced ration. TMR rations are balanced for the particular requirements of a specific group of cows or calves. Several different options are available for types of equipment to mix TMR rations. These types of equipment include assorted designs for both portable and stationary mixers, different types of scales and various types of conveyors.

Earthquake Planning Checklist, Larry R. Piercy

Agricultural Engineering Extension Updates

Scientists warn that a major earthquake could occur at any time along the New Madrid Fault. At the present time they believe there is sufficient energy stored in the fault for a major earthquake of 7.6 magnitude on the Richter Scale. However, these sources estimate that the most probable occurrence will be a smaller earthquake in the 6.0 to 6.5 size range. The chances of such an earthquake occurring before the end of the century is 40-60% and 97% for one occurring in the next 50 years. An earthquake of this size would cause damage over a large area.

Emergency Disinfection Of Drinking Water, Joseph L. Taraba, Thomas W. Ilvento, Linda M. Heaton

Agricultural Engineering Extension Updates

In preparation for emergency situations, there is a need to have a supply of stored water and the ability to disinfect that water and other sources of water that may be available. In emergencies, the main threat from drinking water for people is disease causing organisms. It is important that all water be disinfected before using when there is an uncertainty as to its purity. Stored water that has been disinfected and placed into disinfected containers does not give a person complete certainty of the absence of disease organisms when it is opened because the lids of these containers can …

Home Water Disinfection Methods, Joseph L. Taraba, Thomas W. Ilvento, Linda M. Heaton

Agricultural Engineering Extension Updates

The source of bacteria in your water supply can come from the water source itself, the contamination of the well and/or piping system during maintenance or construction or improper well construction. There are four disinfection methods available for the private water system:

• Chlorination (simple chlorination, super chlorination and shock chlorination)
• Ultraviolet (UV) light
• Ozonation

Do You Need A Water Treatment Product?: What You Need To Know And Ask Before Buying, Joseph L. Taraba, Linda M. Heaton, Thomas W. Ilvento

Agricultural Engineering Extension Updates

A homeowner may have obvious problems with the drinking water system; such as, staining of porcelain sinks, stained clothes after washing, cloudy water, foul/funny tasting or smelling water or corrosion of faucets or plumbing. The homeowners may be very concerned about their water because of recent publicity, advertisements or door-to-door sales which raised issues about the quality of the drinking water from a private or public water supply. The homeowners may be concerned about the water supply after a recent educational program that was attended or presented in the local media outlets. How does that homeowner determine if a water …

Protection Of Private Groundwater Drinking Supplies, Joseph L. Taraba, Jim Dinger, James Webb

Agricultural Engineering Extension Updates

There are three general objectives that this slide presentation concentrates on; First of all, we want to acquaint you with the hydrologic cycle. If one understands this cycle; then, an appreciation for what activities might contaminate our water supplies can be obtained. Secondly, we want to review some of the land use practices that may result in water resource contamination. Thirdly, we want to review well construction and maintenance practices that may result in contamination of an individuals source of drinking water. That brings us to the major goal of this entire program. This major goal is to get each …

Kentucky Traffic Accident Facts 1990 Report, Kentucky State Police

Kentucky Transportation Center Research Report

KENTUCKY'S TRAFFIC ACCIDENT FACTS report for 1990 is based on accident reports submitted to the Ken­tucky Accident Reporting Unit housed in the Kentucky State Police Information Services Branch, Records Section. As required by Kentucky Revised Statutes 189.635, "every law enforcement agency whose officers investigate a vehicle accident of which a report must be made . . . shall file a report of the accident . . . within ten days after investigation of the accident upon forms supplied by the bureau." The stated purpose of this requirement is to utilize data on traffic accidents "for such purposes as will …

Economic Models For Battery Energy Storage: Improvements For Existing Methods, Ronald C. Reckrodt, Max Darwin Anderson, Raymond Michael Kluczny

Electrical and Computer Engineering Faculty Research & Creative Works

While the technology required to produce viable Battery Energy Storage System exists, the economic feasibility (cost vs. benefits) of building these systems requires justification. First, a generalized decision diagram was developed to ensure that all of the economic factors were considered and properly related for the customer-side-of-the meter. Next, two economic models that had consistently given differing results were compared. One was the McKinney model developed at UM-Rolla in 1987; the second was the SYSPLAN model developed by Battelle. Differences were resolved on a point-by-point basis with reference to the current economic environment. The economic model was upgraded to include …

Robust Nonlinear Control Of Brushless Dc Motors In The Presence Of Magnetic Saturation, N. Hemati, J. S. Thorp, Ming-Chuan Leu

Mechanical and Aerospace Engineering Faculty Research & Creative Works

A robust control law is derived and examined for a direct-drive robot arm driven by a brushless DC motor (BLDCM). The complete dynamics of the motor and its interaction with the robot arm are accounted for. This is important, since in a direct-drive servo system the torque generated by the motor is directly transmitted to the load. Effects of magnetic saturation as well as reluctance variations are accounted for, in order to ensure accuracy. The effectiveness of the method is examined through computer simulations. The computational complexity of the overall control scheme is such that it can be readily used …

A Model Of Dc Glow Discharges With Abnormal Cathode Fall, Karl H. Schoenbach, Hao Chen, G. Schaefer

Bioelectrics Publications

A model for an abnormal glow discharge, including a self‐consistent analysis of the cathode fall, was developed. It combines microscopic particle simulation by means of Monte Carlo methods with a fluid model of the gas discharge. The model allows calculations of the steady‐state electrical field distribution, the charged‐particle densities, and the current densities along the axis of the discharge. The model was used to simulate a glow discharge in 80% He and 20% SF₆ at a pressure of 8 Torr with a current density of 1 A/cm². The computed discharge voltage agrees well with measured values. The …

New Product Performance Evaluation Under Simulated Rain, C. Earl Israelsen, Gilberto Urroz

Reports

Introduction: Manufacturers are continually seeking ways of improving the effectiveness of their erosion control products. Products currently in use include chemical as well as organic materials, and they are applied with varying degrees of success. The Fibers Division of the CONWED Corporation, one of the nation's most progressive producers of erosion control products, requested the comparative testing of some of their new products with those of some leading competitors. This report contains results of those tests.

Allocation Of Highway Costs And Revenues, Jerry G. Pigman, John A. Deacon

Kentucky Transportation Center Research Report

This highway cost and revenue allocation study is the fourth of a recent Kentucky series begun in 1982. Experience gained with each study has resulted in subsequent refinements that have enlarged the data base, enhanced the accuracy, and simplified the study process. One of the long-term aims is to develop an easy-to-use process for continuously monitoring effects of changes in traffic patterns, in finance and tax policy, and in highway expenditures.

The primary objective of the current study was to determine the 1989 levels of revenue contribution and cost responsibility for each of several classes of Kentucky highway users. As …

Reduced Order Robust Controllers For An Experimental Flexible Grid, Vittal S. Rao, M. Westerheide, Alok Das

Electrical and Computer Engineering Faculty Research & Creative Works

A procedure for the design and implementation of reduced-order robust controllers for active vibration control on an experimental flexible grid structure is presented. The experimental structure consists of a 5-ft x 5-ft grid made of 2-in-wide, 1/8-in-thick aluminum strips. The grid hangs vertically, being cantilevered at the top to a large T-beam anchored to a cinder block wall. The grid structure is represented by a 75-degree-of-freedom finite-element model, and the controller uses three piezoelectric accelerometer sensors to command three Non collocated DC motor torquers. The modified balance-truncation model-reduction method is used to derive a control synthesis model. These reduced-order models …

Sorption Of Aminonapht Halene And Quinoline On Amorphous Silica, John M. Zachara, Calvin C. Alnsworth, Christina Cowan, Ronald Schmidt

United States Department of Energy: Publications

The adsorption of quinoline and aminonaphthalene was investigated from aqueous solution on amorphous silica SiO₂. Amorphous SiO₂ was not a strong adsorbent of these compounds and quinoline was adsorbed more strongly than aminonaphthalene. The adsorption of both compounds varied with pH. A maximum in adsorption occurred near their respective pK_a's. Temperature effects were significant, suggesting enthalpy contributions in the range of H bonding. Both compounds appeared to adsorb via identical mechanisms that included H bonding and ion exchange. The greater basicity of quinoline combined with (1) the enhanced electron-donating properties of the heteroatom N and …

Biological Assessment Missouri National Recreational River

United States Army Corps of Engineers, Omaha District

A 59 mile stretch of the Missouri River between Gavins Point Dam and Ponca State Park was added to the National Wild and Scenic Rivers System by a 1978 amendment (Section 707 of the National Parks and Recreation Act) to the Wild and Scenic Rivers Act of 1968. Components of the National Wild and Scenic Rivers System are classified as wild, scenic, or recreational, based upon the amount of development existing in the river corridor at the time of designation. The 59 mile reach of the Missouri River from Gavins Point Darn to Ponca State Park was classified as recreational …

Doctor Of Arts In Information Science, Nova University

College of Engineering and Computing Course Catalogs

No abstract provided.

Master Of Science Degree Overview, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Master Of Science In Computer Science, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Master Of Science In Computer Science Courses For The Winter Term Jan-March 1990, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Computer Education Complete Masters Program, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Bachelors In Computer Science Course Descriptions, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.