Engineering Commons^™

An Evaluation Of Leading Versus Lagging Left Turn Signal Phasing, Joseph E. Hummer, Robert E. Montgomery, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Adsorption Of Organic Compounds By Microbial Biomass, Ariamalar Selvakumar

Dissertations

The adsorption of hazardous organic compounds such as phenol, 2-chlorophenol, 2-nitrophenol, chlorobenzene, and ethylbenzene onto two types of inactive microbial biomass (activated sludge and nitrifying bacteria) was studied. The adsorption isotherms could be expressed by the Freundlich adsorption isotherm and were found to be nearly linear over the range of concentrations (50 - 200 mg/1) studied. Desorption studies showed that the adsorption process was partially reversible. Heat of sorption was estimated and indicate that the biosorption process involves a physical rather than a chemical mechanism. The adsorptive capacity of biomass is about two to three orders of magnitude less than …

Implementing Ray Tracing Algorithm In Parallel Environment, Tjah Jadi

Dissertations and Theses

Ray tracing is a very popular rendering algorithm in the field of computer graphics because it can generate highly-realistic images from three-dimensional models. Unfortunately, the computational cost is very expensive. To speed up the rendering process we present both static and dynamic scheduling (balancing) strategies for a multiprocessor system. Hence, the load balancing among the processors is the most important problem in parallel processing. The implementation of the algorithm is based on a modified octree structure.

A Dynamic Model Of Fill-And-Draw Reactor Utilizing An Inhibitory Substrate, Yun-Fei Ko

Theses

A dynamic model of a fill-and-draw reactor has been developed, which includes a number of operational parameters, the fraction of total cycle time devoted to fill, reaction and draw, and the concentration of the toxic substance in the feed to the reactor.

Operating diagrams have been generated, from which one can choose suitable operating parameters.

The model has been solved numerically for Andrews kinetics ( substrate inhibition ), and tested experimentally, using a 5-liter fill-and-draw reactor with phenol as sole carbon source and a pure culture of Pseudomonas putida. Results compared very well to the model predictions.

Modified Broyden’S Method For Accelerating Convergence In Self-Consistent Calculations, Duane D. Johnson

Duane D. Johnson

A modification to Broyden’s method for obtaining stable and computationally efficient convergence in self-consistent calculations is developed and discussed. The method incorporates the advantages of two schemes proposed by Srivastava and by Vanderbilt and Louie without any increase in complexity. Its improvement over their methods is discussed. The present method is compared with two other widely used convergence methods, simple mixing and Anderson’s method, for the case of the disordered binary alloy Ni0.35Fe0.65 on the verge of a magnetic instability and is shown to be much improved in stability and rate of convergence.

Method For Forming A Pallet With Deep Drawn Legs, L. Bogue Sandberg, Bruce A. Haataja, Douglas C. Jurmu, Robert D. Palardy, Frank H. Story, William A. Yates

Michigan Tech Patents

A method for molding articles such as pallets from flake-like wood particles mixed with binder, the pallets housing a deck and integral molding legs. A loosely fitted mat of wood flakes is formed by depositing a first plurality of layers of wood flakes onto a supporting surface with a flake aligners provided for causing alignment of those flakes which will form legs of the pallet. A second plurality of layers are formed with a flake aligner provided for causing alignment of flakes which will form the legs of the pallet and in a direction transverse to the direction of alignment …

Portable Curing Frame, George B. Day V, Larry G. Wells, Timothy D. Smith, Ira J. Ross

Biosystems and Agricultural Engineering Faculty Patents

A portable curing frame is provided particularly adapted for use with an automated tobacco harvester. The curing frame includes a substantially rectangular frame member including a series of slotted tracks, in the form of slotted tubes, specially designed for receiving a notched portion of the plant stalks. The slotted track is substantially continuous and thereby allows infinitely variable spacing between the plants and optimization of ventilation for air curing. Legs are also provided on the portable curing frame. The legs are displaceable between a retracted position allowing storage of the frames and loading of the frames with tobacco plants and …

Economic Benefits Of Various Energy Conservation Options, Florida Solar Energy Center, Public Information Office

FSEC Energy Research Center®

An energy conservation investment for your home can be a significantly better investment than putting your money in the bank. While safe investments in the financial markets may yield about 8 percent return on investment, many energy investments can yield a considerably greater return when analyzed over their expected service life.

Build Your Own Solar Batch Water Heater, Florida Solar Energy Center, Public Information Office

FSEC Energy Research Center®

The solar batch water heater is a fun project for the do-it yourselfer and provides an inexpensive hot water source for the back yard workshop or weekend cabin, It is easy to construct, costs only about $70 to build and produces water temperatures as high as 150 degrees F.

Remember, the batch heater is not designed to operate with pressurized water system and should not be connected to a city water supply. If you are looking for such a system, consider manufactured solar systems, which have been designed to meet strict standards and aesthetic considerations.

Photovoltaic-Powered Lighting System For Overhead Highway Guide Signs, Florida Solar Energy Center, Public Information Office

FSEC Energy Research Center®

The problem: A safety hazard affected motorists traveling through a remote area in Brevard County near the St. Johns River on the eastbound Bee Line Expressway (S.R. 528). At that point the Bee Line splits, sending Titusville- bound motorists to the north, and Central Brevard- bound travelers to the south. Because of the high cost of extending utility service several miles from the nearest distribution point, the overhead guide signs were not illuminated, and at such a critical juncture on the 65-mph highway, it was difficult, if not impossible, to read them at night. The problem-solvers: Since 2.5 million vehicles …

Consumer Facts About Radiant Barriers, Florida Solar Energy Center, Public Information Office

FSEC Energy Research Center®

Radiant barriers are becoming popular for use in Florida attics. Some marketing companies are now selling them with inflated claims of energy savings and questionable installation recommendations. Understandably confused consumers have called the FSEC Public Information Office for answers.

Glass Microspheres, D. E. Day, Gary J. Ehrhardt

Materials Science and Engineering Faculty Research & Creative Works

A radioactive microsphere for radiation therapy of a mammal comprising a biologically compatible glass material containing a beta or gamma emitting radioisotope distributed substantially uniformly throughout the glass. Advantageously, the radioisotope is produced by irradiation of the microsphere.

A Cmos Circuit Generator Using Differential Pass Transistors For Implementing Boolean Functions, Rabe'eh Mahooti

Dissertations and Theses

This study uses differential pass transistor methodology for implementing and evaluating Boolean functions. The main goal is investigation of CMOS and nMOS approaches in pass transistor logic design. Pass-transistor logic is most effective in the implementation of Boolean functions when the vectors are in the same format. It has been demonstrated that nMOS pass transistor logic driven by a control signal voltage above the V_dd level offers a significant improvement in speed. nMOS pass transistorsalso offer less area consumption in comparison to the CMOS approach.

The philosophy developed here has been used in the design of a program for …

Polymer Science In Romania I: "Petru Poni" Institute Of Macromolecular Chemistry, Iasi, Romania, Otto Vogl, Cristofor I. Simionescu, Ioan I. Negulescu

Emeritus Faculty Author Gallery

No abstract provided.

U.S.-Japan Seminar: "Synthesis, Properties And Reactions Of Specialty Polymers", Otto Vogl, Hiroshi Sumitomo

Emeritus Faculty Author Gallery

No abstract provided.

On A Taylor Weak Statement For Finite Element Computations In Gas Dynamics, Jin Whan Kim

Doctoral Dissertations

The Taylor Weak Statement has been developed as a potential unified approach for approximate computation of fluid flows. It is verified to contain a variety of numerical dissipative methods developed for advection problems by specific identification of its expansion parameters. Generalized Fourier modal analysis has been completed in one space dimension for both semi-and fully-discrete approximations, from which the flux limiter method is herein developed and evaluated for finite element computations. Its application to 1- and 2-dimensional scalar models is investigated for continuous and discontinuous initial value problems, and its use for the Euler equation system of gas dynamics in …

Limitation Of Sulfur Dioxide Removal In A Fgd Spray Dryer Using Once Through Slaked Lime, Sambamurty Raju Dantuluri

Doctoral Dissertations

The present study discusses the importance of slaking operation and its effect on the removal efficiency in a spray dryer operated FGD system using slaked lime slurry. Laboratory scale slaking experiments were run to look into various characteristics of resulting slurry. Pilot plant tests were made to quantify the effects of different parameters on spray removal efficiency. A vertical tower mill was used to grind calcium hydroxide slurry to attain smaller particle size. X-ray diffraction and SEM techniques were used to visualize the crystallinity and surface aspects of calcium hydroxide slurry. Sorbent particle size and surface area measurements were made …

A Systematic Transition To Flexible Manufacturing, Sema E. Alptekin, Daniel L. Webber

Industrial and Manufacturing Engineering

The transition from basic automation to flexible manufacturing is an expensive and tedious procedure. It requires meticulous planning and almost clairvoyant forecasting to insure that the initial flexibility obtained is sufficient to allow growth and expansion in the future. This paper will suggest a systematic and methodological approach to achieve optimal flexibility and describe the present results of its application to an ongoing system transformation. Conclusions based on existing levels of completion are presented along with identification of critical and non critical flexibility requirements. The considerations and steps taken are summarized in a procedural format which may then be applied …

The Role Of The Peripheral Vascular Bed In Arterial Pulse Wave Propagation, L. S. Baker, F. A. Anderson, Jr., H. B. Wheeler, William W. Durgin

Office of the Provost Scholarship

An analytical model was developed to simulate human arterial pulse wave propagation in major arteries. It was verified with an experimental model. The models investigated the effects of the peripheral vascular bed on pressure pulse morphology. The models revealed that the capillary bed in normal humans acts as a high resistance, low reflectance, boundary condition.

Acuta Enews December 1988, Vol. 17, No. 12

ACUTA Newsletters

In This Issue

President's Message

Party Line

User Groups

"Project Eagle" And Favors

University of Kentucky Calls on Voice Automation

Of Mouse & Man

Polymer Science In Romania I: "Petru Poni" Institute Of Macromolecular Chemistry, Iasi, Romania, Otto Vogl, Cristofor I. Simionescu, Ioan I. Negulescu

Otto Vogl

No abstract provided.

U.S.-Japan Seminar: "Synthesis, Properties And Reactions Of Specialty Polymers", Otto Vogl, Hiroshi Sumitomo

Otto Vogl

No abstract provided.

Irish Building Services News

Building Services Engineering

No abstract provided.

A Volume Integral Formulation For Electromagnetic Scattering From Homogeneous Dielectric Bodies, Mark Joseph Povinelli

Electrical Engineering and Computer Science – Theses

In recent years, printed circuit antennas have become very useful in conformal and planar phased array antenna systems. Of particular interest is the radiation and scattering performance of stripline and microstrip printed circuit antenna array-elements used in these systems. These ele­ments are generally made up of a complex three-dimensional distribution of dielectrics and con­ductors, which can include microstrip or stripline feed circuitry on a dielectric substrate. Figure 1 shows the geometry of a typical multilayer printed circuit stripline-fed flared slot antenna, used as an array-element in a multioctave planar phased array antenna. This antenna element design also incorporates a stripline …

3rd Conference On Senior Engineering Design Projects, College Of Engineering And Applied Sciences

Senior Engineering Design Conference

The 3rd Conference on Senior Engineering Design Projects was held on December 8, 1988 at the College of Engineering and applied Sciences on the Parkview Campus of Western Michigan University. The college sponsors the conference to showcase the work of its graduating seniors, who are required to complete a capstone project that puts into practice what they have learned. Many of the projects are sponsored by business and industry.

Snow And Ice Removal - Driver Information, Herpicc

Indiana Local Technical Assistance Program (LTAP) Publications

This publication offers information about snow and ice removal for drivers.

Free Carrier Density Profiling By Scanning Infrared Absorption, Jack L. Boone, Michael D. Shaw, Gene Cantwell, William C. Harsch

Electrical and Computer Engineering Faculty Research & Creative Works

A prototype instrument for making contactless measurements of free carrier concentration as a function of the surface coordinates has been developed. The instrument requires minimal sample preparation, and the measurements are nondestructive. Measurements are based upon the free carrier absorption of photons at a wavelength of 10.6 μm. The measurement sensitivity is determined by the ability to resolve small variations in the transmitted wave. These variations can be significantly influenced by changes in sample thickness. A scheme has been devised which eliminates thickness variations by rotating the sample through small angles to achieve a transmission maximum at each data point. …

Energy Considerations In Stock Preparation Refining Modified By Recycling, Rajendra D. Deshpande

Masters Theses

Experiments were conducted to study the effect of refining on virgin fibers as well as on recycled fibers. Interaction effects of recycling and type of treatment of virgin fibers on characteristics of secondary fiber were studied. A significant reduction in drainage properties of the furnish for both hardwood and softwood pulps were observed. This reduction in properties was found proportional to the amount of refining. It is necessary to achieve required strength properties at higher freeness values, if fibers are to be recycled. This can be done by improvement in uniformity or homogeneity of refining and by gentler and less …

System For Boundary Layer Control Through Pulsed Heating Of A Strip Heater, Milton E. Franke, Lawrence Kudelka

AFIT Patents

A system is described for controlling the transition of laminar/turbulent flow at a surface which comprises a thin narrow strip heater disposed adjacent the surface and extending substantially transversely of the flow of the air stream thereacross, the heater being resiliently held in tension on or in closely spaced relationship to the surface, and a power source operatively connected to the heater for applying pulsed voltage of preselected amplitude and frequency to the heater.

Appendix A: Outstanding Road And Street Programs, O. Gilbert Newman

Kentucky's Annual Forum on Transportation

No abstract provided.