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Articles 31 - 60 of 198
Full-Text Articles in Engineering
Experimental Techniques For Plate Buckling, W. Pennington Vann, John Sehested
Experimental Techniques For Plate Buckling, W. Pennington Vann, John Sehested
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Analysis Of Drive-In And Drive-Thru Storage Racks, A. Longinow, M. A. Salmon, R. E. Welch
Analysis Of Drive-In And Drive-Thru Storage Racks, A. Longinow, M. A. Salmon, R. E. Welch
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Effect Of Semi-Rigid Connection To Steel Column Of Cold-Formed Perforated Singly Semmetric Section, Paul Han Cheng
Effect Of Semi-Rigid Connection To Steel Column Of Cold-Formed Perforated Singly Semmetric Section, Paul Han Cheng
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Developments And Application Of Lightweight Steel Components In Housing, Andrew S. Zakrzewski
Developments And Application Of Lightweight Steel Components In Housing, Andrew S. Zakrzewski
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Light Gage Steel And The Changing Building Codes, Marin P. Walsh
Light Gage Steel And The Changing Building Codes, Marin P. Walsh
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Effects Of Allowable Steel Thickness Variation, C. Keith Brasher
Effects Of Allowable Steel Thickness Variation, C. Keith Brasher
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Memory Utilization For A Dynamically Microprogrammed Computer, Paul D. Stigall
Memory Utilization For A Dynamically Microprogrammed Computer, Paul D. Stigall
Electrical and Computer Engineering Faculty Research & Creative Works
A Particular, Dynamically Microprogrammed Computer (Proposed by Tucker and Flynn in Commun. of ACM, April 1971) is Considered with Respect to Main Memory and Micro-Memory Utilization. a Dependency is Shown between Memory Utilization and Utilization of the Arithmetic and Logic Unit.
Buckling Of Diaphragm-Braced Columns Of Unsymmetrical Sections And Application To Wall Studs Design, Amir Simaan, George Winter, Teoman Peköz
Buckling Of Diaphragm-Braced Columns Of Unsymmetrical Sections And Application To Wall Studs Design, Amir Simaan, George Winter, Teoman Peköz
CCFSS Library (1939 - present)
Lateral bracing has a significant effect on increasing the buckling load of compression members. In the case of wall stud construction, such bracing is provided by wallboards directly attached to the stud along its length and results in increasing the load carrying capacity significantly. The objective of this investigation is to study the behavior of singly symmetric sections braced by shear diaphragms and to apply the theoretical findings verified by experimental results to the design of wall studs. In the present investigation the shear rigidity as well as the rotational restraint of the diaphragm are considered. Using an energy approach, …
Buckling Of Diaphragm-Braced Columns Of Unsymmetrical Sections And Application To Wall Studs Design, Amir Simaan
Buckling Of Diaphragm-Braced Columns Of Unsymmetrical Sections And Application To Wall Studs Design, Amir Simaan
CCFSS Library (1939 - present)
No abstract provided.
Generalized Feedback Shift Register Pseudorandom Number Algorithm, Theodore Gyle Lewis, W. H. Payne
Generalized Feedback Shift Register Pseudorandom Number Algorithm, Theodore Gyle Lewis, W. H. Payne
Electrical and Computer Engineering Faculty Research & Creative Works
The generalized feedback shift register pseudorandom number algorithm has several advantages over all other pseudorandom number generators. These advantages are: (1) it produces multidimensional pseudorandom numbers; (2) it has an arbitrarily long period independent of the word size of the computer on which it is implemented; (3) it is faster than other pseudorandom number generators; (4) the "same" floating-point pseudorandom number sequence is obtained on any machine, that is, the high order mantissa bits of each pseudorandom number agree on all machines— examples are given for IBM 360, Sperry-Rand-Univac 1108, Control Data 6000, and Hewlett-Packard 2100 series computers; (5) it …
Velocity Distribution Versus Sediment In The Missouri River, Glendon Taylor Stevens, Terence E. Harbaugh, Paul R. Munger
Velocity Distribution Versus Sediment In The Missouri River, Glendon Taylor Stevens, Terence E. Harbaugh, Paul R. Munger
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Analysis of the large quantities of velocity and sediment data gathered on the Missouri River has not been undertaken in the past due to the heavy workloads of U.S. Army Corps of Engineers staff. The need to undertake this effort has long been recognized by both the Kansas City District and the Omaha Division. As a result of this need, the Kansas City District, Corps of Engineers, entered into a contract with the curators of the University of Missouri in September 1972. Dr. G. T. Stevens of the University's Rolla campus will be the principal investigator and will perform data …
Current Design Practice For Bridge Superstructures Connected To Flexible Superstructures, Jack H. Emanuel, J. Leroy Hulsey, John Best, Joseph H. Senne, Leroy E. Thompson
Current Design Practice For Bridge Superstructures Connected To Flexible Superstructures, Jack H. Emanuel, J. Leroy Hulsey, John Best, Joseph H. Senne, Leroy E. Thompson
CCFSS Library (1939 - present)
No abstract provided.
Reversed And Repeated Lost Tests Of Full-Scale Steel Frames, Lauren D. Carpenter, Le-Wu Lu
Reversed And Repeated Lost Tests Of Full-Scale Steel Frames, Lauren D. Carpenter, Le-Wu Lu
CCFSS Library (1939 - present)
No abstract provided.
Plastic Subassemblage Anlysis And Tests For Rigid High-Rise Steel Frames, J. Hartley Daniels, S. W. Kim
Plastic Subassemblage Anlysis And Tests For Rigid High-Rise Steel Frames, J. Hartley Daniels, S. W. Kim
CCFSS Library (1939 - present)
No abstract provided.
Turbulence Measurements In Submerged Water Jets By Electromagnetic Induction Anemometry, Walter C. Mih
Turbulence Measurements In Submerged Water Jets By Electromagnetic Induction Anemometry, Walter C. Mih
Symposia on Turbulence in Liquids
This paper describes the measurement and data analysis of the turbulence in a two-dimensional water jet discharging from a thin slot into a large body of stationary water having the same width as the slot. Tap water without additives was used as the flow medium. The electromagnetic induction method (commonly known as magnetohydrodynamics, or the MHD method) was used to sense the fluctuation velocities in the diffusion zone of the jet. A DC magnet was placed outside the flow field with the magnetic flux density of 885 Gauss perpendicular to the plane of homogeneity of the two-dimensional flow field. A …
Hydrogen-Bubble Flow-Visualization: Limitations In Drag Reducing Polymer Solutions, George L. Donohue
Hydrogen-Bubble Flow-Visualization: Limitations In Drag Reducing Polymer Solutions, George L. Donohue
Symposia on Turbulence in Liquids
Hydrogen-bubble flow-visualization experiments have demonstrated that distinct bubble pulses cannot be obtained in water solutions of polyacrylamide of high enough molecular weight to cause drag reduction at low shear stresses. Good bubble pulses were obtained in poly(ethylene oxide) and in surfactant solutions, but they did not cause drag reduction at feasible shear stresses.
Front Matter, University Of Missouri--Rolla
Front Matter, University Of Missouri--Rolla
Symposia on Turbulence in Liquids
No abstract provided.
Measurement Of Unsteady Flows In Mercury With Hot-Film Anemometers, Charles A. Sleicher, G. B. Lim
Measurement Of Unsteady Flows In Mercury With Hot-Film Anemometers, Charles A. Sleicher, G. B. Lim
Symposia on Turbulence in Liquids
The difficulties in making turbulence measurements in liquid metals are discussed briefly. Attention is then focused on the problem of frequency response attenuation of hot-film anemometers by the thermal capacity of the thermal boundary layer near cylindrical sensors. A solution is given to the problem of heat transfer from an infinite cylinder normal to the potential flow of a fluid with a small sinusoidal velocity component. Application of the results to anemometer measurements is discussed. Some preliminary experiments on dynamic calibration are reported, and they are in reasonable agreement with the theory for Peclet numbers less than one.
Dynamic Response Of Forced Convective Heat Transfer From Cylinders To Low Prandtl Number Fluids, D. G. Malcolm, V. Verma
Dynamic Response Of Forced Convective Heat Transfer From Cylinders To Low Prandtl Number Fluids, D. G. Malcolm, V. Verma
Symposia on Turbulence in Liquids
The present paper can be viewed as an extension of the work of Lim and Sleicher (9). They evaluated the frequency response of the heated element submerged in liquid metal by a perturbation method for Peclet numbers of up to 0.4. Velocity fluctuations were assumed small and second-order perturbations neglected. The Oseen approximation was made to the velocity field. Here the velocity configuration has been approximated to that of potential flow and the convection equation has been solved numerically with the aid of a digital computer. The potential flow approximation, as compared with the Oseen approximation, is reasonable over a …
Statistical Analysis Of Instantaneous Velocities In Turbulent Flow Of Dilute Viscoelastic Solutions, A. L. Rollin, F. A. Seyer
Statistical Analysis Of Instantaneous Velocities In Turbulent Flow Of Dilute Viscoelastic Solutions, A. L. Rollin, F. A. Seyer
Symposia on Turbulence in Liquids
An experimental study, based on streak photograph determination of instantaneous velocities, was directed at determining the structure of turbulence within the boundary layer and core regions of circular pipes. The measurements lend support to the ejection phenomenon as the mechanism controlling drag reduction.
A correlation factor, defined as the ratio of the observed number of positive instantaneous radial velocities, to the observed number of negative instantaneous radial velocities, suggests acceleration in the radial direction as the elements of fluid move through the sublayer. The correlation factor also provides information about the thickening of the boundary layer for drag reducers relative …
Oceanic Shear Measurements Using The Airfoil Probe, Thomas Osborn, Thomas Siddon
Oceanic Shear Measurements Using The Airfoil Probe, Thomas Osborn, Thomas Siddon
Symposia on Turbulence in Liquids
Vertical profiles of salinity and temperature in the ocean reveal fluctuations with length scales as small as a few mil 1imeters. These fluctuations, called microstructure by oceanographers, are the small scale results of turbulent mixing processes. It is hoped that through the study of microstructure we can evaluate the relative importance of different sources of the turbulent energy (e.g., tides, large scale internal waves, etc.) and the mechanisms for generation of the turbulence (e.g., wave overturn, shear instability, etc.).
There is a considerable body of evidence to suggest that shear instability is an important mechanism in the generation of ocean …
Flow Visualization Studies On Drag-Reducing Turbulent Flows, R. H. J. Sellin
Flow Visualization Studies On Drag-Reducing Turbulent Flows, R. H. J. Sellin
Symposia on Turbulence in Liquids
Flow visualisation studies in a square duct of internal dimensions 44.5 x 44.5 mm are reported. The flow marker is a stream of opaque white dye, released from a downstream facing stationary tube, and it is photographed through the plexiglass wall of the duct. The point of dye release can be traversed in a direction perpendicular to the duct wall and three locations are investigated, two in the core of the flow and one in the near- wall region. By using Is exposure times photographs are obtained of a dye dispersion cone and the cone angle is measured and related …
Measurement Of Reynolds Stress And Turbulence In Dilute Polymer Solution By Laser Velocimeter, Samuel E. Logan
Measurement Of Reynolds Stress And Turbulence In Dilute Polymer Solution By Laser Velocimeter, Samuel E. Logan
Symposia on Turbulence in Liquids
Measurements of Reynolds stress and axial and transverse turbulence intensities have been made in turbulent pipe flow of a dilute solution of high molecular weight polymer and compared to measurements made with pure water. A laser velocimeter capable of measuring these turbulence parameters has been developed and utilized.
Axial turbulence intensities are consistent in behavior and magnitude with previous polymer results and the measurements of transverse intensity and Reynolds stress are similarly well behaved and self consistent. Sublayer thickening in drag reducing polymer solution is observed, in consonance with earlier work. New results include demonstration that the turbulent shearing stress …
Ldv Measurements In Turbulent Free Convection, R. J. Adrian
Ldv Measurements In Turbulent Free Convection, R. J. Adrian
Symposia on Turbulence in Liquids
The design and performance of a laser Doppler velocimeter (LDV) used in a turbulent water-overice convection experiment are described. The LDV was operated in a reference beam mode with an ultrasonic diffraction grating shifting the reference beam frequency to provide bipolar sensing of the vertical velocity, and a phase-locked loop was used to demodulate the Doppler frequency information. The maximum observed velocities in the experiment were ± 1 mm/sec, and the accuracy of instantaneous measurement was limited by Brownian motion and laser line width to ± .04 mm/sec for a 2 Hz frequency response. The practical difficulties encountered in this …
Measurements In Turbulent Water And Two-Phase Flows By Laser Anemometry, A. Melling, J. H. Whitelaw
Measurements In Turbulent Water And Two-Phase Flows By Laser Anemometry, A. Melling, J. H. Whitelaw
Symposia on Turbulence in Liquids
Measurements of the mean and rms values of the longitudinal velocity in a rectangular duct are reported. These results were obtained in a water flow using a laser anemometer. The important design criteria which facilitated the measurements are described and gradient, transit-time, noise and refractive-index corrections are specifically discussed. The results demonstrate the development of a rectangular duct flow and, in particular, reveal that a small lack of symmetry at the duct entrance can readily be identified in the normal- stress results, 37 hydraulic diameters downstream.
The possibility of utilizing water droplets in steam and gas bubbles in water to …
Individual Realization Laser-Doppler Technique Applied To Turbulent Channel Flow, W. G. Tiederman, D. K. Mclaughlin, M. M. Reischman
Individual Realization Laser-Doppler Technique Applied To Turbulent Channel Flow, W. G. Tiederman, D. K. Mclaughlin, M. M. Reischman
Symposia on Turbulence in Liquids
Measurements of the mean and turbulence intensity of the streamwise velocity component in a fully developed, two-dimensional channel flow of water are presented. The measurements were made with the individual realization laser Doppler technique and emphasize the near-wall region of the flow. A dual-scatter optical arrangement was used which employs 90° scattering and yields a probe volume whose length normal to the wall is 0.0075 inches. A correction has been made to the data that accounts for the statistical biasing which occurs in the individual realization technique. The corrected data demonstrate that the individual realization technique can yield accurate velocity …
Analysis Of A Laser Correlation Anemometer, L. Lading
Analysis Of A Laser Correlation Anemometer, L. Lading
Symposia on Turbulence in Liquids
An analysis of a laser anemometer is given. The anemometer is based on the cross correlation of the random signals generated by the scattering from -- and/or extinction of -- two parallel laser beams. The basic set-up is compared with the laser Doppler anemometer.
It is shown that the correlation function exhibits a broadening and generally also a skewness - equivalent to the broadening (transit time) and skewness (velocity gradients) of the Doppler spectrum.
The conditions for "instantaneous point" measurements are derived.
It is shown how a particle (drop/bubble) size versus particle velocity spectrum can be obtained by appropriate electronic …
Optimization Of An Lda System, Robert Smid
Optimization Of An Lda System, Robert Smid
Symposia on Turbulence in Liquids
This paper discusses the various considerations leading to the optimization of a laser Doppler anemometer for measurements in the flows of gases, liquids, and solids. The requirements placed on the various parameters of the optics by the experiment are discussed in general for different modes of operation. Expressions determining these optical parameters in certain instances given by various authorities are presented and compared. This includes such topics as: laser power, particle size, measuring volume size, optical variation in transmitting and receiving optics, and photodetector selection.
Features Of A Separating Turbulent Boundary Layer As Revealed By Laser And Hot-Film Anemometry, R. L. Simpson, J. H. Strickland, P. W. Barr
Features Of A Separating Turbulent Boundary Layer As Revealed By Laser And Hot-Film Anemometry, R. L. Simpson, J. H. Strickland, P. W. Barr
Symposia on Turbulence in Liquids
Experiments have been performed to determine the fundamental nature of boundary layer separation produced by an adverse pressure gradient. Measurements upstream and downstream of the separation zone have been made utilizing laser and hot-film anemometry techniques.
A completely mobile backscattering laser anemometer was developed. This alone is a significant development because of the relatively long focal lengths required for measurements in a 36" wide wind tunnel. Signal processing was achieved by a digital signal sampling and storage system. Both mean and fluctuating velocities in both the unseparated and separated flow regions were measured. Experimental results are in fairly good agreement …
Design Considerations For A Laser Doppler Velocimeter, Leroy M. Fingerson
Design Considerations For A Laser Doppler Velocimeter, Leroy M. Fingerson
Symposia on Turbulence in Liquids
In optimizing an instrument design, it is important to differentiate between the theoretical limitations of the technique and apparent limitations that can be reduced or eliminated by design. In the laser-Doppler anemometer, the theoretical limits are associated with the fact that particle velocity is the measurement rather than fluid velocity. The accuracy and speed of the particle velocity measurements do not appear to have theoretical limitations. Therefore, instrument design must concentrate on improving the measurement of particle velocity.
A complete system has been designed to optimize accuracy, speed, convenience, and flexibility in measuring particle velocity. The problems inherent in transferring …