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Articles 1 - 30 of 437
Full-Text Articles in Engineering
Illustrative Examples Based On The Asce Standard Specification For The Design Of Cold-Formed Stainless Steel Structural Members, Shin-Hua Lin, Wei-Wen Yu, Theodore V. Galambos
Illustrative Examples Based On The Asce Standard Specification For The Design Of Cold-Formed Stainless Steel Structural Members, Shin-Hua Lin, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
PREFACE During the past four years, two methods were developed for the design of stainless steel structural members at the University of Missouri-Rolla with consultation of Professor T. V. Galambos at the University of Minnesota. One of the methods is based on the load and resistance factor design (LRFD) and the other is based on the allowable stress design (ASD). Both design methods are now included in the new ASCE Standard 8-90, Specification for the Design of Cold-Formed Stainless Steel Structural Members. At the September 21, 1990 meeting of the Control Group of the ASCE Stainless Steel Cold-Formed Section Standards …
Part 1 Of The Mcmaster University Laboratory Test Program On Brick Veneer/Steel Stud Wall Systems, Robert G. Drysdale, Normand Breton
Part 1 Of The Mcmaster University Laboratory Test Program On Brick Veneer/Steel Stud Wall Systems, Robert G. Drysdale, Normand Breton
CCFSS Library (1939 - present)
The behaviour of steel stud backup wall panels subjected to lateral loads was investigated experimentally and analytically. In addition, various steel stud to track connections were investigated experimentally.
The experimental work consisted of the fabrication and testing of 109 steel stud to track connections. Thirty-two full size steel stud backup wall panels were also tested. Some of the panels were braced with various types of commonly used steel bridging while others were braced with gypsum board sheathing or Styrofoam SM insulation. Twelve beam tests were also performed in order to establish the flexural bending capacity of the steel studs tested. …
Analysis Of Baseband Equivalent Noise In A First-Order Correlation Loop Utilizing Filtered Pseudonoise Signals, Kurt Louis Kosbar, Christopher J. Scholten
Analysis Of Baseband Equivalent Noise In A First-Order Correlation Loop Utilizing Filtered Pseudonoise Signals, Kurt Louis Kosbar, Christopher J. Scholten
Electrical and Computer Engineering Faculty Research & Creative Works
Conventional direct-sequence and frequency-hopping spread spectrum systems utilize delay-lock loops to track the timing epoch of pseudonoise codes. These devices perform admirably at high signal-to-noise ratios (SNR), however, they are suboptimal at moderate and low SNR. A correlation loop that employs appropriately filtered pseudonoise signals for the local cross-correlation waveform may have superior performance under these conditions. The performance of this modified correlation loop will be determined by the cross correlation function of the transmitted waveform and locally generated reference signals, along with the statistics of the baseband equivalent noise process. In this work, we find the statistics of the …
Flexural Behavior Of Web Elements With Openings, Roger A. Laboube, Wei-Wen Yu, Ming-Yang Shan, K. D. Batson
Flexural Behavior Of Web Elements With Openings, Roger A. Laboube, Wei-Wen Yu, Ming-Yang Shan, K. D. Batson
CCFSS Library (1939 - present)
INTRODUCTION The purpose of this research project has been to investigate the flexural behavior of C-shaped members with web openings. Three common industry standard C-sections have been studied as summarized in the First and Second Progress Reports. To date two testing sequences have been completed. Test sequence No.1 investigated sections with web openings fabricated from nominally low yield strength material. Test sequence No.2 examined sections both with and without web openings. Specimens in test sequence No. 2 have nominally higher yield strengths. This report summarizes the test procedure and results of the research to date.
Sol-Gel Derived, Air-Baked Indium And Tin Oxide Films, Douglas M. Mattox
Sol-Gel Derived, Air-Baked Indium And Tin Oxide Films, Douglas M. Mattox
Materials Science and Engineering Faculty Research & Creative Works
A sol-gel derived, transparent, electrically conducting tin-doped In2O3 film system has been developed which only requires air baking. The films approximate the properties of sputtered and hot-sprayed films but are simpler and less expensive to apply by dipping and spinning procedures. Substrate sodium interference was seen to be minimal. © 1991.
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Strength Of Cold-Formed Steel Beams Under Dynamic Loads, Chi-Ling Pan, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Strength Of Cold-Formed Steel Beams Under Dynamic Loads, Chi-Ling Pan, Wei-Wen Yu
CCFSS Library (1939 - present)
INTRODUCTION It has long been recognized that material properties and stress-strain relationships of sheet steels can be influenced by the strain rate. A considerable amount of theoretical and experimental research have been undertaken in the past to study material properties and the behavior of structures under dynamic loads and impact loads. In view of the fact that in the current AISI Automotive Steel Design Manual 1, the design criteria for effective design width are based on the test results under static loading condition, the objective of this investigation was to study the validity of these effective design width formulas for …
Composition And Method For Radiation Synovectomy Of Arthritic Joints, D. E. Day, Gary J. Ehrhardt
Composition And Method For Radiation Synovectomy Of Arthritic Joints, D. E. Day, Gary J. Ehrhardt
Materials Science and Engineering Faculty Research & Creative Works
A method for preparing nonradioactive microspheres adapted for radiation synovectomy of arthritic joints in a mammal involves forming the microspheres by doping a biodegradable glass material which may be lithium or potassium silicate, lithium or potassium aluminosilicate, lithium or potassium aluminoborate, lithium or potassium germanate or lithium or potassium alumino- germanate with an isotope which may be samarium, holmium, erbium, dysprosium, rhemium or yttrium so that the isotope is chemcially dissolved in and distributed uniformly throughout the glass material. The doped glass material is then treated with an acid wash to produce a thin layer on the surface thereof and …
Integrated Neural Network And Machine Vision Approach For Intelligent State Identification, Cihan H. Dagli, Timothy Andrew Bauer
Integrated Neural Network And Machine Vision Approach For Intelligent State Identification, Cihan H. Dagli, Timothy Andrew Bauer
Engineering Management and Systems Engineering Faculty Research & Creative Works
An interfacing of neural networks (NNs) and machine vision to provide the next state of a system given an image of the present state of the system is presented. This interfacing is applied to a loading operation. First, a NN is trained for part recognition under conditions of rotation, location, object distortion, and background noise given an image of the part. Then, a second NN, given the output of the first NN and an image of a pallet being loaded, is trained for optimal part loading onto the pallet under conditions of noise in the image. The paradigm used is …
Ccfss News August 1991, Wei-Wen Yu Center For Cold-Formed Steel Structures
Ccfss News August 1991, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Newsletters (1999 - 2008)
No abstract provided.
Interaction Of Sodium, Sulfur, And Silica During Coal Combustion, Thomas A. Erickson, Douglas K. Ludlow, Steven A. Benson
Interaction Of Sodium, Sulfur, And Silica During Coal Combustion, Thomas A. Erickson, Douglas K. Ludlow, Steven A. Benson
Chemical and Biochemical Engineering Faculty Research & Creative Works
The Interaction of Sodium, Sulfur, and Silica at Conditions Typical in a Pulverized Coal Furnace Was Investigated by using Both Model Mixtures and a Synthetic Coal. the Model Mixtures Consisted of Selected Inorganic Constituents that Were Well Mixed in Proportions Typically Found in Low-Rank Coal. the Synthetic Coal Consisted of a Furfuryl Alcohol Polymer with Appropriate Amounts of Sodium, Sulfur, and Silica to Duplicate the Characteristics of Low-Rank Coal. the Model Mixtures and Synthetic Coal Were Burned in a Laminar Flow (Drop-Tube) Furnace at 900, 1100, 1300, and 1500 °C and Residence Times of 0.1,0.5,1.5, and 2.4 S. the Resulting …
Flexural Behavior Of Web Elements With Openings, Roger A. Laboube, Wei-Wen Yu, K. D. Batson
Flexural Behavior Of Web Elements With Openings, Roger A. Laboube, Wei-Wen Yu, K. D. Batson
CCFSS Library (1939 - present)
INTRODUCTION The purpose of this phase of the research has been to investigate the flexural behavior of C-shaped members with web openings. Three common industry standard C-sections were tested as outlined in the first progress report. The web openings were located at 24 inches on center as illustrated in Fig. 1. Each test specimen was subjected to two point loads until the ultimate flexural strength of the member was obtained. This report summarizes the test procedure and results of the research to date.
Tensile Strength Of Welded Connections, Wei-Wen Yu, Roger A. Laboube
Tensile Strength Of Welded Connections, Wei-Wen Yu, Roger A. Laboube
CCFSS Library (1939 - present)
PREFACE The tensile strength of an arc spot weld is given only limited attention in the current edition of the AISI Specification for the Design of Cold-Formed Steel Structural Members. To broaden the design engineer's understanding of the behavior of arc spot welds, and to expand the specification's application for arc spot welds, the American Iron and Steel Institute, in 1989, initiated a research study at the University of Missouri-Rolla. The UMR research consisted of a comprehensive literature review, and experimental study which comprised of over 260 individual connection test specimens. The test specimen selection enabled the investigation of the …
Network Model Investigation Of Gas Transport In Bidisperse Porous Adsorbents, John H. Petropoulos, John K. Petrou, Athanasios I. Liapis
Network Model Investigation Of Gas Transport In Bidisperse Porous Adsorbents, John H. Petropoulos, John K. Petrou, Athanasios I. Liapis
Chemical and Biochemical Engineering Faculty Research & Creative Works
A capillary network model consisting of a micropore network permeated by one of macropores of randomly varying size has been constructed. Although simplified (to keep computer space and time requirements low) in relation to a real bidisperse porous adsorbent or catalyst, it embodies the salient pore structural features likely to determine the gas-transport behavior of such porous solids. Suitable model calculations of Knudsen gas-phase and surface diffusion enabled us to (i) validate useful approximate methods for the more economical evaluation of network permeability and (ii) demonstrate certain important characteristic effects of nonrandom bidisperse pore structure on transport behavior and their …
Composition And Method For Radiation Synovectomy Of Arthritic Joints, D. E. Day, Gary J. Ehrhardt
Composition And Method For Radiation Synovectomy Of Arthritic Joints, D. E. Day, Gary J. Ehrhardt
Materials Science and Engineering Faculty Research & Creative Works
Radioactive microspheres for radiation synovectomy of arthritic joints in a mammal comprises a biodegradable glass material and a beta radiation emitting radioisotope chemically dissolved in and distributed substantially uniformly throughout the glass material. The biodegradable glass material may be lithium silicate, lithium aluminosilicate, lithium aluminoborate, lithium germa- nate, lithium aluminogermanate, potassium silicate, potassium aluminosilicate, potassium aluminoborate, potassium germanate or potassium aluminogermanate and the beta radiation emitting radioisotope may be samarium-153, holmium-166, erbium-169, dysprosium-165, rhenium-186, rhenium-188 or yttrium-90. Method for preparing such microspheres and for carrying out radiation synovectomy of arthritic joints utilizing such microspheres are also disclosed.
Radioactive Glass Microspheres, D. E. Day, Gary J. Ehrhardt
Radioactive 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.
Vertical And Angular Motion Of A Wing Model In Steady Flow: A Physical And Numerical Experimental Study, Andrew P. Johnston
Vertical And Angular Motion Of A Wing Model In Steady Flow: A Physical And Numerical Experimental Study, Andrew P. Johnston
Opportunities for Undergraduate Research Experience Program (OURE)
The dynamic response of a rigid wing in steady flow mounted on translational and rotational elastic supports is investigated. This study presents both a numerical and a physical experimental arrangement that can be employed to investigate the effect of a wide range of parameters on the response of the wing subjected to steady flow. An interactive computer program, which utilizes the fourth order Runge-Kutta integration scheme to solve the governing differential equations, is discussed. The program output allows for quick visualization of the change in response due to parameter changes. An experimental arrangement that utilizes the new 18" x 18" …
Study Of Joint Flexibility In Steel Frame Structures, Randy R. Frank
Study Of Joint Flexibility In Steel Frame Structures, Randy R. Frank
Opportunities for Undergraduate Research Experience Program (OURE)
Joint flexibility plays an important role in the distribution of strains and displacements in the frame structures of buildings, towers, automobiles, etc.. The objective of this project is to study the effect of flexibility (or rigidity) of two simple mechanical joints in frame structures on the stress and displacement distributions, using both experimental and analytical methods. Three welded and three bolted samples were fabricated using A-36 low carbon steel in a two column and horizontal crossmember (table) arrangement. This arrangement allows for both shear forces and axial forces in the joint. From a three element rectangular rosette strain gage attached …
The Edge Strength Of Annealed And Heat-Strengthened Glass, Gregory P. Sallee
The Edge Strength Of Annealed And Heat-Strengthened Glass, Gregory P. Sallee
Opportunities for Undergraduate Research Experience Program (OURE)
Sadly, up until now, very little research has been conducted in the field of glass window strength. The purpose of this research, therefore, is to explore the topic of glass window strength such that we might offer some conclusive evidence as to the probable in-situ performance of structural windows. Our intention is to examine the specific phenomenon of thermally- induced stress and its effect on glass strength. J. G. Croll explains the existence of this well-documented problem. "Whenever a structure is subjected to a varying temperature distribution, or where it is prevented from free expansion, stresses will be induced that …
Identity Authentication Based On Keystroke Latencies Using Neural Networks, Angela Lammers, Sharon Langenfeld
Identity Authentication Based On Keystroke Latencies Using Neural Networks, Angela Lammers, Sharon Langenfeld
Opportunities for Undergraduate Research Experience Program (OURE)
Most computer security systems verify the identity of a user through objects in the user's possession such as keys or magnetic cards, or through knowledge the user has, such as a password or PIN number. There are, however, two other methods of user verification, which have as yet received little or no attention. There has been some work done on the third method, recognition of physiological patterns (such as finger prints, retinal patterns, or voice patterns), but this work has been limited and requires expensive hardware to implement. The final method of user verification is through actions such as signature …
Two-Phase Flow Measurement, Glenn Brenneke
Two-Phase Flow Measurement, Glenn Brenneke
Opportunities for Undergraduate Research Experience Program (OURE)
Liquid fuel engines have many applications in today's world. Diesel, spark-ignition, and gas turbine engines, and furnaces are just a few of the many applications of liquid fuel sprays. With the rising cost of fuel and need for energy conservation it is imperative that more efficient engines be developed. Analyzing liquid fuel spray characteristics non-intrusively could unlock the door to powerful highly efficient engines in the future.
The vaporization of fuel is mandatory in liquid fuel combustion. Vaporization and the fuel to air ratio are important characteristics of the spark-ignition engine. Compression ignition is controlled by the parameters of the …
Model Calculational Approach To The Conformation Of Adsorbed Polypeptide Fragments, Timothy J. Mckeon
Model Calculational Approach To The Conformation Of Adsorbed Polypeptide Fragments, Timothy J. Mckeon
Opportunities for Undergraduate Research Experience Program (OURE)
The focus of the paper is to examine possible conformational changes of peptides when placed in the presence of a poly-synthetic material. A major concern in the pharmaceutical industry is the loss of potency of polypeptide drug products during processing, packaging and storage. An example of this is polymer syringes being used in place of glass ones. The effect is that some protien-derived products experience structural changes due to contact with the polymer. This is otherwise known as surface denaturation. In order to understand the energetics of interfacial polypeptide systems, a calculational approach was used via the program Alchemy. The …
Implementation Of The Articulated Total Body (Atb) Model On An Apollo Workstation, M. F. Laudon
Implementation Of The Articulated Total Body (Atb) Model On An Apollo Workstation, M. F. Laudon
Opportunities for Undergraduate Research Experience Program (OURE)
The Articulated Total Body Model (ATB) is used for predicting gross segmented body response in various dynamic environments. The ATB computer program, originally written by the Department of Transportation as a Crash Victim Simulation (CVS) program, was later modified by the Calspan Corporation and More recently by the Armstrong Aerospace Medical Research Laboratory (AAMRL) to allow for aerodynamic force applications, harness belt capabilities and hyper-ellipsoidal graphical display of the modeled segments. The ATB model has been successfully used to investigate gross human body responses to bodies placed in such complex dynamic environments as high-speed aircraft ejection. This ATB model is …
Control And Data Reduction Software For Umr Neutron Spectrometer, Matthew K. Mclaughlin
Control And Data Reduction Software For Umr Neutron Spectrometer, Matthew K. Mclaughlin
Opportunities for Undergraduate Research Experience Program (OURE)
A double-scatter time-of flight neutron spectrometer has been obtained by the Nuclear Engineering department of the University of Missouri-Rolla (UMR). As this device was an experimental prototype which was never brought to full operation, the chance to work with two of the original builders of the spectrometer at EG&G Idaho was an excellent opportunity. Part of the work being done with the detector is the development of a PC-based software package for machine control, data acquisition, and data reduction. It is this part of the project which has been supported by UMR’s Opportunities for Undergraduate Research Experience (OURE) program.
Measuring Hydrogen In Galvanized Steels, Timothy O'Hearn
Measuring Hydrogen In Galvanized Steels, Timothy O'Hearn
Opportunities for Undergraduate Research Experience Program (OURE)
There has been much investigation in the past concerning ways to eliminate the embrittling effects of hydrogen in galvanized steel components. Such galvanized parts are used extensively in the automotive industry. One solution that is commonly used is to anneal the galvanized parts at approximately 200 degrees Celsius for 4 to 24 hours. This annealing process does restore the ductility. However, very few if any experiments have been done to measure the amount of hydrogen released and the temperature dependence of the hydrogen release. This investigation is part of an on going effort to measure the hydrogen released from galvanized …
The Electrochemical Characterization Of Ferrocene As A Guest Molecule In The Presence Of Ss-Cydodextrin, Anne T. Roberson
The Electrochemical Characterization Of Ferrocene As A Guest Molecule In The Presence Of Ss-Cydodextrin, Anne T. Roberson
Opportunities for Undergraduate Research Experience Program (OURE)
This experiment involves the development of electrochemical experimental methods for the determination of the oxidation/reduction potentials of a guest ferrocene complex (C10H10Fe) hosted by ß-cyclodextrin. The project was conducted so that the specific interaction of two molecules forming a unique inclusion compound can be used as a model for rapid analysis of other small molecules. In principle, the study is based on the expected equilibrium interaction of the iron compound with ß-cyclodextrin resulting in a complexed and an uncomplexed species equilibrium. The project's experimental objective is to determine if the redox potentials of both complexed and …
Establishment Of A Phase/Doppler Particle Analyzer For Two-Phase Flow Experiments, J. L. Burget
Establishment Of A Phase/Doppler Particle Analyzer For Two-Phase Flow Experiments, J. L. Burget
Opportunities for Undergraduate Research Experience Program (OURE)
The accurate measurement of liquid spray drop size and velocity is important in a variety of applications. These applications include agricultural sprays, furnaces, spark ignition and compression ignition engines, gas turbines, and a variety of industrial processes. Because of the need to improve combustion efficiency and minimize soot and other harmful emissions, one of the most active areas of research is fuel spray combustion. Quantitative measurements of the vapor phase in fuel sprays is vital to the understanding of spray dynamics and the operation of combustion devices.
There are various measurement techniques available to measure vapor phase characteristics in a …
Some Stability And Control Aspects Of A Variable Pivot Wing Configuration, Paul Vitt
Some Stability And Control Aspects Of A Variable Pivot Wing Configuration, Paul Vitt
Opportunities for Undergraduate Research Experience Program (OURE)
In supersonic flight, there is a large positive shift in the static margin, which causes extreme positive shifts in longitudinal stability, and is an undesirable characteristic. This paper investigates some of the stability and control aspects of an alternative configuration, that of a variable pivot wing aircraft -- an aircraft with two sets of wings, one set sweeps forward, the other set sweeps rearward. By prescribing a sweep schedule, it is desired to minimize the static margin shift with Mach number. The effects of the two lift elements -- that of mechanical shift of the center of pressure forward with …
A Computer Simulation Of The Umr Reactor, H. Allen Wilkins
A Computer Simulation Of The Umr Reactor, H. Allen Wilkins
Opportunities for Undergraduate Research Experience Program (OURE)
The Opportunities for Undergraduate Research project entitled, "A Computer Simulation of the UMR Reactor" had two goals. To produce a reactor simulation to be used in creating an artificial intelligence based reactor simulation for the UMR Nuclear Reactor and to produce a means of teaching students the fundamentals of reactor operations.
The primary purpose was to create a program which would simulate all the situations one would encounter in actual reactor operation. With the simulator the artificial intelligence system could be thoroughly tested before use with actual reactor data.
This same simulator would be used as a teaching aid for …
Measurement Of Voltage And Current In Electric Power Systems, Michael Davis
Measurement Of Voltage And Current In Electric Power Systems, Michael Davis
Opportunities for Undergraduate Research Experience Program (OURE)
A. B. Chance Company of Centralia, Missouri requested a study of the latest state-of-the- art technology to measure voltage and current on a normal distribution power line. (4kV - 35kV)
The particular device that A. B. Chance needs must be relatively inexpensive, $200.00 per measurement, reliable, and capable of being manufactured by them.
Four types of power line measurement techniques were investigated; electrooptics/magnetooptics, present day measurement devices, the Raychem Line Monitor, and remote voltage and current sensing (RVCS).
The remote voltage and current sensing idea is the basis of the following report.
Modeling For Supersonic Missile Wing-Body Interference Lift, Howard S. H. Ho
Modeling For Supersonic Missile Wing-Body Interference Lift, Howard S. H. Ho
Opportunities for Undergraduate Research Experience Program (OURE)
During the initial phase of a missile design, a quick and simple way of estimating wing-body interference is essential. A simple panel model based on the cross flow over a cylinder is developed to estimate the effect of the body on the wing lift This model produces quick and reasonably accurate results, while little user expertise is needed. This model determines KWB (upwash interference factor) and KΦ (sideslip interference factor), and is applicable to infinitely thin delta and clipped delta fins on missiles in supersonic flight. The effects of the fin semivertex angle, span, taper ratio, free stream …