Engineering Commons^™

A Light Transmission Model For Biological Materials, R. A. Cavaletto, Shrinivasa Upadhyaya, Michael O'Brien

BioResource and Agricultural Engineering

This paper describes a model to predict light transmission in biological materials. The model can be used for any shaped sample. Scattering and absorption coefficients are used in the model and may be varied throughout the sample, thus allowing both uniformly distributed and concentrated defects to be modelled.

Guarding Of Table Saws With Light Beams: The Light Guard Concept, R. A. Cavaletto, M. S. Kaminaka, C. M. Zahner

BioResource and Agricultural Engineering

This paper describes a unique type of psychological safety guard for hazardous tools such as table saws, presses. and other tools with areas and components which are dangerous to human fingers, hands, and limbs. It is not a piece of hardware but rather a shalt of light which defines a danger zone around the saw blade or cutting area.

Designing And Installing Radiant Barrier Systems, Florida Solar Energy Center, Philip Fairey

FSEC Energy Research Center®

A radiant barrier system is, in general, a layer of foil facing an airspace, installed in the envelope of a building. Such systems are very effective in impeding radiant heat transfer and consequent heat gain, especially in southern residences. Before designing and installing a radiant barrier system, you should become familiar with the concept of radiant energy transfer. Design Note 6, Radiant Energy Transfer and Radiant Barrier Systems in Buildings, is required reading if you are not familiar with this concept.

Technique For Video Compression By Projection Onto Convex Sets, P. Santago, Sarah A. Rajala

Sarah A. Rajala

This paper describes a video compression technique which utilizes the alternating projection theorem for convex sets. The image to be transmitted is determined to be in certain convex sets and parameters defining these sets are sent. The receiver can then use the method of successive projections to locate an image which is in the intersection of the sets. If the intersection is small then the image determined should be close to the desired image. The coder can be made more robust by easily adding additional convex sets or using it in conjunction with other coding schemes such as motion compensation.

Second S.R. Romania-U.S.A. Seminar On Polymer Science, Otto Vogl, Viorica Dobrescu

Emeritus Faculty Author Gallery

No abstract provided.

Polymer Science And Technology In Universities In Sweden, Otto Vogl, Bengt Ranby

Emeritus Faculty Author Gallery

No abstract provided.

Dynamic Behavior Of Boiling Water Reactors, Jose March-Leuba

Doctoral Dissertations

A study of the basic processes involved in boiling water nuclear reactor dynamics is presented. The main emphasis of this research has been placed on the physical interpretation of these processes. It is shown that this type of reactors have two regimes of operation: linear, during normal operation, and nonlinear, if they become unstable due to the thermohydraulic feedback. Both of these regimes are studied using low-order physical models.

The main result obtained from the linear study is the pole-zero configuration of the reactivity-to-power transfer function. It is determined that three zeros and four poles are needed to properly represent …

Acuta Enews December 1984, Vol. 13, No. 12

ACUTA Newsletters

In This Issue

CABLING SYSTEMS FOR THE TELECOMMUNICATIONS EXPLOSION

PARTY LINE

GETTING OVER YOUR TELEPHONE HANG-UPS

POTPOURRI

Polymer Science And Technology In Universities In Sweden, Otto Vogl, Bengt Ranby

Otto Vogl

No abstract provided.

Second S.R. Romania-U.S.A. Seminar On Polymer Science, Otto Vogl, Viorica Dobrescu

Otto Vogl

No abstract provided.

The Oxidation Of Dilute Alloys Of Magnesium In Aluminium, Hollis P. Leighly, A. Alam

Materials Science and Engineering Faculty Research & Creative Works

The oxide layers developed during the oxidation of aluminum alloys containing 500 and 1000 PPM of magnesium at 850K were examined with the aid of electron spectroscopy for chemical analysis. The magnesium content of the oxide layers was relatively high because of the preferential depletion of the magnesium atoms from the base alloys. Near the outer surfaces of the oxide layers, spinel (MgAl2O4) was the predominant magnesium-bearing compound. At depth, MgO was more dominant. The preferential depletion of magnesium from the alloys injected vacancies into the material. This led to the formation of defect clusters. The presence of these defect …

Irish H & V News

Building Services Engineering

No abstract provided.

A Review And Analysis Of Pile Design, David L. Allen

Kentucky Transportation Center Research Report

A review of lateral load design of piles is presented. It appears many different methods and allowable lateral loads are permitted by the states. One particular method is discussed in detail, and from that method two charts are presented that relate pile deflection to lateral load. Recommendations are given on design criteria for lateral loads.

A review of allowable axial stresses is also presented. The results of a brief finite element analysis of pile tip settlement versus load for various conditions are also presented. These results are compared to data obtained from the literature. Recommendations on maximum allowable axial stress …

Study Of Longitudinal Landing Flying Qualities Evaluation Using Pilot Model Theory, Eric D. Didomenico

Theses and Dissertations

Control Anticipation Parameter (CAP), used in MIL-SPEC-8785C as a longitudinal handling qualities criterion does not adequately distinguish between different flight phases. Recent flight test data from the Landing Approach Higher Order Systems (LAHOS) study further indicate the inadequacy of the second order approximations for higher order longitudinal landing flying qualities. Nine Aircraft that fall within the Level 1 boundary reveal pilot ratings ranging from 1.5 to 10 (Cooper/Harper). These nine aircraft are studied by combining their longitudinal dynamics with pilot modelling to examine a better method of landing flying quality prediction and evaluation. Pilot model theory (cross-over pilot model) is …

Solution To Eigenvalue Problems Of Antisymmetric Cross-Ply And Antisymmetric Angle-Ply Laminated Plates Using Affine Transformations, Zaffir A. Chaudry

Theses and Dissertations

Using affine transformations and suitably recasting the buckling vibration differential equations, the eigenvalue problem of anti-symmetric cross-ply and antisymmetric angle-ply laminated rectangular plates has been reduced to a function of two strong material constants, the generalized rigidity ratio, whose range is in the closed interval from 0 to 1, and the ratio of principal lamina stiffness. With the reduction in number of constants an exhaustive parameter study of buckling and vibration solution trends, is possible. The buckling coefficients decrease with decreasing value of generalized rigidity ratio for both antisymmetric cross-ply and antisymmetric angle-ply laminates. For a given aspect ratio, and …

Application Of Combined Jointed Media And Discrete Slip Plane Characteristics To Subsidence Predictions, David W. Basinger

Theses and Dissertations

This thesis presents an application of a numerical formulation incorporating the effects of joints, cracks, and fractures to a soil subsidence predictions problem, and the extension of that formulation to combined discrete slip planes and jointed media continua formulations. The results obtained are compared to each other and to a physical centrifuge simulation performed previously on the same problem.

Evaluation Of Durable Lane Delineation Materials (Interim Report), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

The objective of the study is to evaluate the cost-effectiveness of available marking materials by means of field tests and to develop a policy for material selection of lane delineation based on these tests. Materials tested included: 100 percent solid epoxy paint, polyester paint, extruded thermoplastic, 3M Stamark tape, 3M Bisymmetric tape, EPOFLEX, solvent epoxy paint, and chlorinated rubber paint. Most test installations have been in place for over two years, and this interim report summarizes findings for that period. The evaluation will continue for another 18 months with recommendations presented in a final report.

Based on current data, expanded …

Pavement Management In Kentucky, Gary W. Sharpe, Robert C. Deen, Herbert F. Southgate, Rolands L. Rizenbergs, James L. Burchett

Kentucky Transportation Center Research Report

The principal objective of this paper is to summarize current pavement management activities in Kentucky. Early pavement management activities generally were decentralized (involving a number of transportation functions such as planning, design, construction, maintenance, and research) and involved long-term monitoring for skid resistance and ride quality (roughness).

Current pavement management activities may be categorized by evaluation, project selection, and development of recommendations for pavement rehabilitation strategies. Pavement evaluation activities at the statewide system level typically involve assessments of ride quality (ridesbility index) and estimated pavement serviceability, skid resistance, visual condition ratings, and the accumulation of traffic volumes and pavement fatigue. …

Evaluation Of Durable Crosswalk And Stopbar Marking Materials (Interim Report), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

The objective of this study is to find the most cost-effective durable marking material to provide long-lasting stop bars and crossbars. Three materials were tested: 1) 3M Stamark tape, 2) Prismo preformed tape, and 3) extruded thermoplastic. The evaluation concerned the durability, reflectivity, and appearance of the materials. Test installations have been in place for about 18 months, and this interim report summarizes findings for that period. The evaluation will continue for another 18 months, and recommendations will be presented in a final report.

Based on current evaluations, the extruded thermoplastic material would be considered the most cost-effective material for …

Test 1550: Steiger Panther Iv Sm-325 Diesel 20-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Fast Method For Calculating The Self-Consistent Electronic Structure Of Random Alloys, Duane D. Johnson, F. J. Pinski, G. M. Stocks

Duane D. Johnson

We describe a computationally efficient method for performing self-consistent-field calculations of the electronic structure of random solid-solution alloys within the multiple-scattering coherent-potential-approximation formalism (KKR-CPA). We utilize a cluster method for solving the KKR-CPA equations and integrate along a contour in the complex-energy plane to reconstruct the single-site electronic densities.

Cold Formed Steel In Folded Truss Decks, Robert W. Dannemann

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Design Aids For Stiffened Channels, James A. Cran, Joseph Williams

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Evaluation Of Elastically Restrained Compression Flanges Of Cold-Formed C-Shaped Sections, G. Haaijer, K. H. Klippstein, J. H. Garrett Jr.

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Simplified Design Approach For Laterally Braced Purlins Subjected To Wind Uplift, Roger A. Laboube

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Load And Resistance Factor Design Of Cold-Formed Steel Structural Members, Theodore V. Galambos, Wei-Wen Yu

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Comparative Study Of Load And Resistance Factor Design Vs. Allowable Stress Design, Brian K. Snyder, Lan-Cheng Pan, Wei-Wen Yu

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Local Buckling In Curved Box Members, Issam E. Harik, Raghuram Ekambaram

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Influence Of Manufacturing Technology On Cold Formed Structural Members, George T. Halmos

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Teaching Cold-Formed Steel Design In The 80s, P. K. Basu

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.