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Articles 1 - 30 of 263
Full-Text Articles in Engineering
An Evaluation Of Leading Versus Lagging Left Turn Signal Phasing, Joseph E. Hummer, Robert E. Montgomery, Kumares C. Sinha
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.
Portable Curing Frame, George B. Day V, Larry G. Wells, Timothy D. Smith, Ira J. Ross
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
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
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
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
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
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.
Polymer Science In Romania I: "Petru Poni" Institute Of Macromolecular Chemistry, Iasi, Romania, Otto Vogl, Cristofor I. Simionescu, Ioan I. Negulescu
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
U.S.-Japan Seminar: "Synthesis, Properties And Reactions Of Specialty Polymers", Otto Vogl, Hiroshi Sumitomo
Emeritus Faculty Author Gallery
No abstract provided.
A Systematic Transition To Flexible Manufacturing, Sema E. Alptekin, Daniel L. Webber
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
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 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
3rd Conference On Senior Engineering Design Projects, College Of Engineering And Applied Sciences
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
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
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. …
System For Boundary Layer Control Through Pulsed Heating Of A Strip Heater, Milton E. Franke, Lawrence Kudelka
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.
Variable Angle Spectroscopic Magneto-Optics And Ellipsometry: Application To Dyco Multilayers, Thomas E. Tiwald, William A. Mcgahan, Z. S. Shan, Alan M. Massengale, John A. Woollam
Variable Angle Spectroscopic Magneto-Optics And Ellipsometry: Application To Dyco Multilayers, Thomas E. Tiwald, William A. Mcgahan, Z. S. Shan, Alan M. Massengale, John A. Woollam
Department of Electrical and Computer Engineering: Faculty Publications
The purpose of this paper is twofold. First, we describe the adaptation of a variable angle spectroscopic ellipsometer (VASE) to magneto-optic measurements covering 3000–8000 Å, and 0 to ±8 kOe. Second, we describe application of VASE to determine Kerr rotation and ellipticity for a series of Dy/Co multilayers prepared by sputter deposition. We report spectroscopic ellipsometric and Kerr effect results for samples exhibiting perpendicular magnetic anisotropy, since these are relevant as magneto-optic recording media.
Polymer Science In Czechoslovakia Ii: Universities In The Czech Socialist Republic, Otto Vogl, Jaroslav Kralicek, Miroslav Schatz, Petr Vondracek
Polymer Science In Czechoslovakia Ii: Universities In The Czech Socialist Republic, Otto Vogl, Jaroslav Kralicek, Miroslav Schatz, Petr Vondracek
Emeritus Faculty Author Gallery
No abstract provided.
31st International Congress Of Pure And Applied Chemistry, Sofia, Bulgaria,1987, Otto Vogl, Ivan Shopov, Ivan Panayotov
31st International Congress Of Pure And Applied Chemistry, Sofia, Bulgaria,1987, Otto Vogl, Ivan Shopov, Ivan Panayotov
Emeritus Faculty Author Gallery
No abstract provided.
Transformation Based Endorsement Systems, Thomas Sudkamp
Transformation Based Endorsement Systems, Thomas Sudkamp
Computer Science and Engineering Faculty Publications
Evidential reasoning techniques classically represent support for a hypothesis by a numeric value or an evidential interval. The combination of support is performed by an arithmetic rule which often requires restrictions to be placed on the set of possibilities. These assumptions usually require the hypotheses to be exhausitive and mutually exclusive. Endorsement based classification systems represent support for the alternatives symbolically rather than numerically. A framework for constructing endorsement systems is presented in which transformations are defined to generate and update the knowledge base. The interaction of the knowledge base and transformations produces a non-monotonic reasoning system. Two endorsement based …
Finite Element Model Of Nitrogen Species Transformation And Transport In The Unsaturated Zone, Jagath J. Kaluarachchi, J. C. Parker
Finite Element Model Of Nitrogen Species Transformation And Transport In The Unsaturated Zone, Jagath J. Kaluarachchi, J. C. Parker
Civil and Environmental Engineering Faculty Publications
A two-dimensional finite element model based on Galerkin's weighted residual approach and incorporating an upstream weighting technique was developed to predict the simultaneous transformation and transport of nitrogen species. The nitrogen cycle used in the analyses assumes first-order rate coefficients for nitrification, denitrification, immobilization and mineralization between the nitrogen species NH +4, NO -3, organic-N and denitrified fractions. The NO -3-N component in the soil solution was assumed to have negligible adsorption on exchange sites while adsorption of NH +4 was assumed to be represented by a Freundlich type nonlinear isotherm ( S = kdCp). The accuracy and validity of …
Mulch: A Multi-Layer Channel Router Using One, Two, And Three Layer Partitions, Ronald I. Greenberg, Alex T. Ishii, Alberto L. Sangiovanni-Vincentelli
Mulch: A Multi-Layer Channel Router Using One, Two, And Three Layer Partitions, Ronald I. Greenberg, Alex T. Ishii, Alberto L. Sangiovanni-Vincentelli
Computer Science: Faculty Publications and Other Works
Chameleon, a channel router for three layers of interconnect, has been implemented to accept specification of an arbitrary number of layers. Chameleon is based on a strategy of decomposing the multilayer problem into two- and three-layer problems in which one of the layers is reserved primarily for vertical wire runs and the other layer(s) for horizontal runs. In some situations, however, it is advantageous to consider also layers that allow the routing of entire nets, using both horizontal and vertical wires. MulCh is a multilayer channel router that extends the algorithms of Chameleon in this direction. MulCh can route channels …
Goes Imagery Fills Gaps In Montserrat Volcanic Cloud Observations, Mark A. Davies, William I. Rose
Goes Imagery Fills Gaps In Montserrat Volcanic Cloud Observations, Mark A. Davies, William I. Rose
Department of Geological and Mining Engineering and Sciences Publications
GOES satellite imagery offers great potential to lessen the risk of volcanic ash clouds to aviation, and the situation at Montserrat in the Caribbean is providing the proof. Many transatlantic, commercial, and private aircraft use airspace around Montserrat, where the Soufriere Hills Volcano has been erupting since 1995.
Worldwide over the last 15 years, more than 80 airplanes have reported encountering volcanic ash along flight paths. Encounters cannot be avoided because onboard radar cannot detect fine-grained ash particles—those with a radius of 15 microns or less. In recent years volcanic cloud encounters are estimated to have caused hundreds of millions …
Thin-Film Hermeticity: A Quantitative Analysis Of Diamond-Like Carbon Using Variable Angle Spectroscopic Ellipsometry, S. Orzeszko, Bhola N. De, John A. Woollam, John J. Pouch, Samuel A. Alterovitz, David C. Ingram
Thin-Film Hermeticity: A Quantitative Analysis Of Diamond-Like Carbon Using Variable Angle Spectroscopic Ellipsometry, S. Orzeszko, Bhola N. De, John A. Woollam, John J. Pouch, Samuel A. Alterovitz, David C. Ingram
Department of Electrical and Computer Engineering: Faculty Publications
The purpose of this paper is twofold. First, we report on the successful application of variable angle spectroscopic ellipsometry to quantitative thin-film hermeticity evaluation. Secondly, it is shown that under a variety of film preparations and moisture introduction conditions water penetrates only a very thin diamondlike carbon (DLC) top surface-roughness region. Thus DLC is an excellent candidate for use as protective coatings in adverse chemical and aqueous environments.
Method And Apparatus For Conversion Of Coal In Situ, Ottfried J. Hahn
Method And Apparatus For Conversion Of Coal In Situ, Ottfried J. Hahn
Mechanical Engineering Faculty Patents
A method for the electro-thermal and electrochemical underground conversion of coal into oil and by-products comprises the steps of inserting an underground probe into a bore hole until the probe is in close proximity to a coal seam. A mixture of air, steam, an electrolyte and a suitable catalyst is supplied to the probe, and the mixture is then sprayed directly on the coal seam through a passage in a nozzle. The probe is also energized with electricity applied to the nozzle to produce an arc between the coal and the probe, simultaneous with the spraying of the mixture on …
Iupac “Macro 87” In Merseburg (Gdr) Linking Tradition And Future In Polymer Science, Otto Vogl, Burkart Philipp
Iupac “Macro 87” In Merseburg (Gdr) Linking Tradition And Future In Polymer Science, Otto Vogl, Burkart Philipp
Emeritus Faculty Author Gallery
No abstract provided.
Variable Angle Of Incidence Spectroscopic Ellipsometric Characterization Of Tio2/Ag/Tio2 Optical Coatings, Kazem Memarzadeh, John A. Woollam, Abe Belkind
Variable Angle Of Incidence Spectroscopic Ellipsometric Characterization Of Tio2/Ag/Tio2 Optical Coatings, Kazem Memarzadeh, John A. Woollam, Abe Belkind
Department of Electrical and Computer Engineering: Faculty Publications
Optical constants (3000–8000 Å) and layer thicknesses of TiO2/Ag/TiO2 optical coatings are determined using variable angle of incidence spectroscopic ellipsometry. Ellipsometrically determined silver layer thicknesses agree well with those obtained by cross-sectional transmission electron microscopy. Also, spectral characteristics, absent in bulk silver data, are observed in n and k spectra for the thin silver layers. It is suggested that these structures may be caused by plasmon effects from the silver layers.
Acuta Enews October 1988, Vol. 17, No. 10
Acuta Enews October 1988, Vol. 17, No. 10
ACUTA Newsletters
In This Issue
Administrative Director
President's Message
Party Line
User Groups
Anatomy of a Telecommunications Installation Part 3
Regional Meeting Reports
Reflectance Of An Absorbing Substrate For Incident Light Of Arbitrary Polarization: Appearance Of A Secondary Maximum At Oblique Incidence, R. M.A. Azzam, A. M. El-Saba
Reflectance Of An Absorbing Substrate For Incident Light Of Arbitrary Polarization: Appearance Of A Secondary Maximum At Oblique Incidence, R. M.A. Azzam, A. M. El-Saba
Electrical Engineering Faculty Publications
The reflectance of an absorbing substrate Rθ(ɸ) is considered as a function of the angle of incidence ϕ and an incident polarization parameter θ, where cos2θ and sin2θ give the power fractions of incident radiation that are p-and s-polarized, respectively. Taking GaAs as an example, we find that at certain wavelengths (e.g., 0.248 and 0.620 µm), the Rθ vs ɸ curve becomes oscillatory in a narrow range of θ > 45° with an unexpected secondary maximum appearing at oblique incidence. The extrema of the function Rθ(ɸ) are determined numerically, and their angular …
Comments On Proposed Transport Protocols, Anil Bhatia, James Sterbenz, Gurudatta M. Parulkar
Comments On Proposed Transport Protocols, Anil Bhatia, James Sterbenz, Gurudatta M. Parulkar
All Computer Science and Engineering Research
Over the last few years, a number of research groups have made considerable progress on the design of high speed networks- on the order of a few hundred Mbps to the few Gbps. The emphasis of this work has been on the design of packet switches and on the design of network access protocols. However, this work has not yet addressed the internetworking and transport level issues in the high speed internet. As part of our effort on the design of VHSI model, we considered the appropriateness of recently proposed transport protocols, NETBLT and VMTP, as candidates for the transport …