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Articles 50101 - 50130 of 53197
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Stability And Synthesis Of Transfer Functions Rational In W = E To The Power Of The Square Root Of T (S² + Bs + C) And Omega = The Square Root Of T (S² + Bs + C), James Fred Archer
Stability And Synthesis Of Transfer Functions Rational In W = E To The Power Of The Square Root Of T (S² + Bs + C) And Omega = The Square Root Of T (S² + Bs + C), James Fred Archer
Masters Theses
"The bounded input-bounded output stability is investigated for networks containing uniformly distributed LRGC, LRC, GRC and G(ω)RC elements. The region of stability in the W plane (W = e to the power of the square root of (s² + bs + c), Θ plane (Θ = the square root of (s² + bs + c), and S plane (S = s²+bs+c) is found in each case so that if the poles of a transfer function rational in W, Θ or S lie within this region the system is stable. After obtaining a desired transfer function rational in W = e …
Design And Preliminary Testing Of A Thermomechanical Rock Fragmentation Apparatus, Gary Earl Fenton
Design And Preliminary Testing Of A Thermomechanical Rock Fragmentation Apparatus, Gary Earl Fenton
Masters Theses
"The design characteristics of equipment to thermally weaken and mechanically fragment hard rock were developed and the apparatus constructed. An initial investigation of thermo-mechanical fragmentation was conducted on Missouri red granite. The particles from the fragmentation tests were sized and this analysis was used in the Rittinger theory to calculate surface area breakage energy. It was found that the application of thermal energy could reduce the surface area breakage energy per unit volume of material removed by as much as 41 percent. The use of kerfs in the rock increased the amount of material removed and permitted larger particles to …
Characteristics Of And Suggested Improvements In Communication Laboratory Equipment At University Of Missouri-Rolla, William Edgar Abernathie
Characteristics Of And Suggested Improvements In Communication Laboratory Equipment At University Of Missouri-Rolla, William Edgar Abernathie
Masters Theses
"This paper documents characteristics of and suggests improvements in Communication Laboratory Equipment built at the University of Missouri at Rolla. Included are Voltage Controlled Oscillators, Discriminators, Operational Amplifiers, and Multipliers. The graduate and undergraduate laboratory student thus has available equipment characteristics and, when building higher performance equipment, improvement suggestions"--Abstract, page ii.
The Pm3m-Fm3m Transformation And Phase Equilibrium In Solid Solutions Of Csc1 With Kc1, Rbc1, And Csbr, John David Weyand
The Pm3m-Fm3m Transformation And Phase Equilibrium In Solid Solutions Of Csc1 With Kc1, Rbc1, And Csbr, John David Weyand
Masters Theses
"Thermal expansion and the Pm3m t Fm3m transition of cesium chloride have been studied with high temperature diffractometry, differential thermal analysis, and heating and quenching techniques. The onset temperature of the transition in pure CsCl, on heating, is 471ºC. There are no observable premonitory effects below the transition temperature and no apparent structural relationships between the polymorphs is apparent. Both phases coexist over a 20º to 50ºC temperature range and equilibrium thermal hysteresis occurs on heating and cooling. Hysteresis behavior is explained by addition of strain energy parameters to the free energy function. Initiation of the Pm3m t Fm3m transformation …
Synthesis Of Active Distributed Rc Networks Via The W=E[Superscript Square Root Of S] Transmission, Roy Dale Hensley
Synthesis Of Active Distributed Rc Networks Via The W=E[Superscript Square Root Of S] Transmission, Roy Dale Hensley
Masters Theses
"The material presented here provides a means for synthesis of networks containing uniformly distributed RC elements. After transforming the desired transfer function into a function rational in W = e[superscript square root of sRC] , state-variable synthesis methods are applied to obtain a model containing elements with transfer functions of the form 1/W. A circuit is then presented for the 1/W block along with error analysis and design procedures for use in construction of the model. The elements of the synthesis procedures of Wyndrum and O'Shea are presented for comparison. Furthermore, synthesis of functions rational in W and Θ = …
Design Of A Semi-Automatic Transmission, Yogendra Prahladray Buch
Design Of A Semi-Automatic Transmission, Yogendra Prahladray Buch
Masters Theses
"Design of a semi-automatic four-speed transmission for automotive engines with moderate horsepower is described. The basic configuration consists of main and countershafts and five pairs of constant-mesh gears. Engine torque is transmitted through an input gear pair to the countershaft, and finally to the output shaft through a selected output gear pair. Selection is accomplished by engaging one of five hydraulically operated clutches located on the countershaft. Engagement fixes the desired gear to the countershaft and engine torque is then transmitted to the mating gear, which is fixed to the output shaft. Fourth speed is obtained by coupling the input …
Magnetic Properties Of Ceramic Ferrites Developed For Use In Fractional Horse Power A.C. Motors, Ram Saran Bhatia
Magnetic Properties Of Ceramic Ferrites Developed For Use In Fractional Horse Power A.C. Motors, Ram Saran Bhatia
Masters Theses
"The ceramic material produced in the Ceramic Engineering Department of the University of Missouri-Rolla has been tested to determine its magnetic properties. First the B-H characteristic, Q-factor and initial permeability were measured at different frequencies and the relative-loss factor was determined from the above results. The samples prepared were in the shape of toroids of approximately 8.0 cm of mean length and were wound with standard insulated number 38 wire. The soft ferrite material was produced to determine whether or not it could be used in the design of fractional H.P. a.c. motors"--Abstract, page ii.
The Effect Of Diameter On The Film Boiling Behavior Of Liquid Nitrogen, William Joseph Wafer
The Effect Of Diameter On The Film Boiling Behavior Of Liquid Nitrogen, William Joseph Wafer
Masters Theses
"A film boiling heat transfer study was conducted for liquid nitrogen at atmospheric pressure. The heat transfer surfaces used were cylinders with outside diameters of 0.450, 0.650, 0.850, and 1.000 inches. The temperature differences covered were from approximately 150ºF to approximately 600ºF. The data indicate that the heat flux will decrease to a minimum then increase slightly as the diameter of the heat transfer element is increased at constant temperature difference. The heat transfer coefficient is expected to approach a flat plate correlation as the diameter approaches infinity"--Abstract, page ii.
Development Of A Set Of Optimum Synchronization Codes For A Unique Decoder Mechanization, Irv D. Siegel
Development Of A Set Of Optimum Synchronization Codes For A Unique Decoder Mechanization, Irv D. Siegel
Masters Theses
"Synchronization requirements are specified for and a unique decoder mechanization is associated with a particular communication system. Optimum synchronization codes, defined as codes which are the least susceptible to false synchronization indications, are sought. Existing sets of optimum codes are investigated for applicability. This Thesis shows how these sets were developed from selected criteria and demonstrates why their theoretical nature produces unsatisfactory results in the present application wherein all parameters are known. A computer program was written to examine code pattern performance in the specified decoder under actual operating conditions. From an analysis of the results, a recommended set of …
Free Vibrations Of Circular Cylindrical Shells, Sushil Kumar Sharma
Free Vibrations Of Circular Cylindrical Shells, Sushil Kumar Sharma
Masters Theses
"In this report bending theory of shells is used to determine the natural frequencies and mode shapes of circular cylindrical shells. The governing eighth-order system of differential equations has been put in a form which is especially suitable for numerical integration and application of different sets of homogeneous boundary conditions. The Holzer method is used to solve the eigenvalue problem. During numerical integration of the differential equations, the exponentially growing solutions are suppressed whenever they become larger than previously selected values. Numerical results are obtained for various shell geometry parameters and for three different sets of homogeneous boundary conditions. These …
The Design Of A Data Set Interface, Wayne Everett Omohundro
The Design Of A Data Set Interface, Wayne Everett Omohundro
Masters Theses
"This paper describes the data set interface which connects the SCC-650 digital computer to the IBM-360 computer by means of a data communications link over a telephone line. To provide the necessary background information, the basic concepts and techniques of digital data communications are discussed. In conjunction with these concepts, several possible system arrangements of modems, terminals, and computers are given. Also two computer-to-computer networks are discussed. The first one is the system used at the Lawrence Radiation Laboratory for the acquisition of experimental data. The second system, the one in which the interface operates, is the data communications system …
Thickening And Dewatering Characteristics Of Activated Sludge Containing Metal-Precipitated Phosphorus, Lyle Wayne Merritt
Thickening And Dewatering Characteristics Of Activated Sludge Containing Metal-Precipitated Phosphorus, Lyle Wayne Merritt
Masters Theses
"The purpose of this research study was to investigate methods for the disposal of activated sludge containing metal-precipitated phosphorus. To accomplish this objective, chemically-treated activated sludge or a mixture of the secondary sludge with primary sludge were thickened and dewatered by vacuum filtration and centrifugation. The putrescibility of the dewatered secondary sludge was also evaluated, and since anaerobic digestion is the usual method of sludge treatment, a digestion study was conducted. Secondary sludge for these studies was produced in five 38-gpd (144-1/day) activated sludge pilot plants operated at the Rolla Southeast Treatment Plant. Ferric chloride and alum were added directly …
A Triangular Element For Numerical Solutions Of Axisymmetric Conduction Problems In Cylindrical Coordinates, Prafulla Chandra Mahata
A Triangular Element For Numerical Solutions Of Axisymmetric Conduction Problems In Cylindrical Coordinates, Prafulla Chandra Mahata
Masters Theses
"The triangular element is one of the many suitable elements which are used in finite difference methods as applied to conduction heat transfer. Such elements find many applications in conduction problems in Cartesian coordinates. This work proposes a new triangular element for axisymmetric conduction problems in cylindrical coordinates. The validity and workability of the networks formed by the proposed triangular elements are strengthened by selected examples. The work is completed by the application of the triangular element to an industrial problem having irregular boundaries. The results are compared with the solution obtained by the finite element method"--Abstract, page ii.
The Integrated Planning Method Of Project Planning, Development And Implementation, Joseph Frank Lynch
The Integrated Planning Method Of Project Planning, Development And Implementation, Joseph Frank Lynch
Masters Theses
"Present comprehensive planning endeavors lack a consistent methodology which will produce realistic, useable results. The validity of this statement should be obvious after one has read Miller's "Evaluation of City and Region Planning Techniques." This paper contains a methodology, "The Integrated Planning Method," which will go a long way toward correcting this gross inadequacy that planners presently encounter in directing planning efforts. Two government developed planning and analysis procedures that, up until this time have been applied almost exclusively to hardware systems, have been combined into one integrated planning methodology that will provide not only meaningful and rigorous definition and …
Evaluation Of A Cation Isotopic Substitution Technique In Conjunction With A High Temperature Gas Pycnometer For Determining The Stoichiometry Of Materials, Michael Clair Graves
Evaluation Of A Cation Isotopic Substitution Technique In Conjunction With A High Temperature Gas Pycnometer For Determining The Stoichiometry Of Materials, Michael Clair Graves
Masters Theses
"This study was concerned with the evaluation of a high temperature gas pycnometer, used in conjunction with a cation isotopic substitution technique, for determining the stoichiometry of materials. Three methods were investigated for determining the correction factors for the thermal gradient effects in the gas pycnometer. The correction factors were shown to be dependent on the temperature, the sample volume, and the height of the sample in the sample chamber. Under the conditions of these experiments, the correction factors were shown to be essentially independent of sample grain size and pycnometer atmosphere. The determination of the stoichiometry of cadmium oxide …
Some Factors Affecting The Results In Cyclic Triaxial Tests, Suresh Kumar Chaudhary
Some Factors Affecting The Results In Cyclic Triaxial Tests, Suresh Kumar Chaudhary
Masters Theses
"A major cause of damage to structures and earth embankments during earthquakes or any other such dynamic vibrating loading conditions has been the liquefaction of saturated sands. There have been several investigations to establish a convenient and relatively simple laboratory test procedure and to study the nature of field conditions leading to sand liquefaction. This investigation evaluates the effects of sample size, testing frequency, and the method of sample preparation on the number of cycles to cause initial liquefaction in pulsating triaxial tests using standardized equipment and test procedures. It has been found that sample size does affect test results …
Contractor Quality Control: A Method Of Construction Inspection, John Scott Treadwell
Contractor Quality Control: A Method Of Construction Inspection, John Scott Treadwell
Masters Theses
"It has become apparent in recent years that the United States Government's construction contract supervision and administration procedures are causing an increase in contractor claims and disputes and that the system itself is becoming prohibitively expensive. To deal with some of these problems, the Department of Defense is attempting to implement a new approach to construction inspection--Contractor Quality control. Under the Contractor Quality Control System the majority of the standard contract inspection and testing responsibilities are placed on the contractor, and the Government relinquishes its traditional step-by-step inspection and testing procedures and withdraws to a position of contract surveillance. The …
Comparing Community Resources To Industrial Needs With Application To Daviess County, Missouri, Jay Eldon Waggoner Jr.
Comparing Community Resources To Industrial Needs With Application To Daviess County, Missouri, Jay Eldon Waggoner Jr.
Masters Theses
"A method of matching industries with communities, the modified Miller-Weiss Indugram, is developed. The technique compares the environmental needs of industry with the environmental resources of a community. The comparison is based upon twenty-five environmental factors. Application of the technique is made to Daviess County, Missouri. Results indicate those industries which are best suited for this rural area"--Abstract, page ii.
Irradiation Enhanced Decomposition Of A Nickel-Carbon Solid Solution, Bryce Linn Shriver
Irradiation Enhanced Decomposition Of A Nickel-Carbon Solid Solution, Bryce Linn Shriver
Masters Theses
"This investigation was performed to determine the effects of room temperature neutron irradiation on the distribution of carbon in a nickel--0.3 wt. % carbon alloy. The experiment consisted of comparing the amount of carbon in solid solution and the internal stresses of both unirradiated and irradiated (10¹³ fn-cm⁻² < ΦF < 10¹⁸ fn-cm⁻²) samples following isochronal anneals between 100ºC and 1200ºC by using the magnetic disaccommodation technique. The results indicate that the amount of carbon remaining in solid solution decreases with increasing neutron dose. At temperatures below 200ºC this is due to the trapping of carbon by mobile irradiation-produced defects. Between 200ºC and 600ºC the formation of metastable carbides is enhanced by the presence of irradiation-produced defects. No differences are observed in irradiated and unirradiated samples above 600ºC"--Abstract, page iii.
Shop Level Maintenance Of Inertial Platforms Without A Surveyed Site, Max E. Bott
Shop Level Maintenance Of Inertial Platforms Without A Surveyed Site, Max E. Bott
Masters Theses
"The initial installation of a rotary tilt table for an aircraft inertial navigation system test facility includes accurately aligning the rotary tilt table to local level and true north coordinates. The survey techniques presently employed are an encumbrance during installation and complicate remote deployment. The objective of this thesis is to determine if an inertial platform or platforms can practically be used to replace the role of the survey techniques in the rotary tilt table alignment. The construction, capability and operation of a rotary tilt table are reviewed. The tests necessary to test and calibrate an inertial platform are outlined, …
A Hardware And Software Interface Between A Graphics Terminal And The Scc 650 Computer, George Irvin Rhine Jr.
A Hardware And Software Interface Between A Graphics Terminal And The Scc 650 Computer, George Irvin Rhine Jr.
Masters Theses
"This paper describes the design of a digital interface between a graphic terminal and the SCC-650 computer. The graphic terminal-computer combination can be used as a stand alone system for small applications or can be used as a satellite processor for a larger system such as the IBM System 360, The interface is designed utilizing DTL NAND type integrated circuits. Its primary functions may be divided into three main categories: (1) to give level conversion, (2) control, and (3) data manipulation. All requests for data transfers are initiated by the computer, the interface then assumes a control mode which handles …
The Influence Of Temperature, Carbon Content, And Preloading On Secondary Consolidation Of A Clay, Richard Kai-Ming So
The Influence Of Temperature, Carbon Content, And Preloading On Secondary Consolidation Of A Clay, Richard Kai-Ming So
Masters Theses
"The effect of temperature, organic carbon content, and preloading on secondary consolidation of Bryce clay has been studied. A straight line plot of void ratio versus logarithm of time was established in secondary consolidation for long term loading periods up to one month. Temperature changes within the range of 5ºC. to 45ºC. were studied in the secondary consolidation phase at different stress levels and different carbon contents of the soil. Secondary consolidation in a preloading cycle at a stress level of 2 tsf unloaded to 1 tsf and reloaded to 2 tsf was studied. The preloading tests were at temperatures …
Triangular Signal Stabilization Of Nonlinear Systems, Kamaleddin Yadavar Nikravesh
Triangular Signal Stabilization Of Nonlinear Systems, Kamaleddin Yadavar Nikravesh
Masters Theses
"Many nonlinear systems display self-sustained oscillations which are often undesirable. The stabilizing effect of a high frequency input signal on an oscillating system with one nonlinearity is determined by the characteristics of the nonlinear element in the system, the linear portion of the system and the amplitude of the signal. This investigation has been concerned with the effect of a triangular wave stabilizing signal on these self oscillations. The equivalent gains for several common nonlinearities are derived. The pseudo describing function introduced by Oldenburger and Boyer for sinusoidal stabilization has been extended to the triangular wave case, and it is …
An Experimental Determination Of The Effect Of The Axisymmetric Turbulent Wake On The Pressure Distribution On A Sphere, Martin Gardner Bowin
An Experimental Determination Of The Effect Of The Axisymmetric Turbulent Wake On The Pressure Distribution On A Sphere, Martin Gardner Bowin
Masters Theses
"A study of the effect of the turbulent wake of a water drop on the motion of a smaller droplet is essential in order to gain an understanding of the behavior associated with the collision coalescence phenomena. The use of spheres of macroscopic size proves to be a valuable method in observing these effects. This experimental investigation centers on (1) a check on the validity of the instrumented sphere as a device to measure normal static pressure, and (2) the study of the effect of the turbulent wake of the test model sphere upon the instrumented sphere. Measurements were made …
Phase Equilibrium And Thermodynamic Study Of Lime-Iron Oxide Solid Solutions, Shin Suk Kang
Phase Equilibrium And Thermodynamic Study Of Lime-Iron Oxide Solid Solutions, Shin Suk Kang
Masters Theses
"The solubility limits of iron oxide in solid lime were determined as a function of oxygen pressure at 1300º and 1400ºG in the system CaO-iron oxide. The stability region of dicalcium ferrite was determined with respect to formation of lime-iron oxide solid solution and liquid oxide. In addition, the hydration behavior in moist air of pure lime and sintered mixtures of lime and iron oxide was also observed. Pelletized samples were equilibrated under known oxygen partial pressures and quenched. Phases present in the quenched samples were identified by microscopy. The solubility limit of iron oxide in CaO is strongly dependent …
The Effect Of Cathodic Protection On The Stress Corrosion Characteristics Of 300m Low Alloy Steel, John Pechonick
The Effect Of Cathodic Protection On The Stress Corrosion Characteristics Of 300m Low Alloy Steel, John Pechonick
Masters Theses
"The objective of this investigation was to determine if stress corrosion failure of 300M steel is accelerated by the application of cathodic protection. Testing was conducted on notch tensile specimens that were coated with vacuum cadmium, electroplated cadmium, and vacuum aluminum. All specimens were stressed and placed in an aqueous sodium chloride environment. The failure times for the specimens were monitored and graphs were drawn which characterized the stress corrosion resistance of 300M steel and the cathodic protection systems. Fractography techniques were used to study the failure surfaces to determine the type of failure mechanism. The results of this thesis …
Effects Of Flat And Elongated Particles Upon Properties Of Mixtures Containing Glass Aggregates, John Dean Doyle
Effects Of Flat And Elongated Particles Upon Properties Of Mixtures Containing Glass Aggregates, John Dean Doyle
Masters Theses
"As a possible solution for the rapidly proliferating problem of waste glass disposal in the United States, glass is being considered for use as aggregate in bituminous concrete mixtures. Crushed waste glass particles, and crushed bottle glass particles in particular, are more angular, much smoother, and contain a higher percentage of flat and/or elongated particles than conventional rock aggregate particles. Because of the differences in shape and surface texture, glass aggregate may require different gradations than those found suitable for conventional rock aggregate. Objectives of this research were to determine gradations which result in maximum density for aggregates consisting entirely, …
A Study Of Early-Late Type S0-Pcm Signal Bit Synchronizers, Kuang-Cheng Hu
A Study Of Early-Late Type S0-Pcm Signal Bit Synchronizers, Kuang-Cheng Hu
Masters Theses
"The steady-state phase noise performances of an absolute value type and a squaring loop type of early-late gate S0-PCM signal bit synchronizers are developed using the Fokker-Planck method. The results are compared on the basis of the performance of two configurations with equal loop bandwidth at each input signal-to-noise ratio Rs. The probabilities of bit-detection error of the two configurations are compared. These comparisons are made as a function of Rs. The absolute value type of early-late gate S0-PCM signal bit synchronizater yields better performance than that of the squaring loop type of early-late gate S0-PCM …
Final Sintering Of Cr₂O₃ With Minor Additions Of Mgo And Sintering Of Mgo With Minor Additions Of Cr₂O₃, Gordon E. Jungquist
Final Sintering Of Cr₂O₃ With Minor Additions Of Mgo And Sintering Of Mgo With Minor Additions Of Cr₂O₃, Gordon E. Jungquist
Masters Theses
"The effect of oxygen activity on the sintering of Cr₂O₃ with minor additions of MgO, and of MgO with minor additions of Cr₂O₃ at 1600ºC was investigated. A peak density (99.4% of theoretical) was obtained for high purity Cr₂O₃ by maintaining the equilibrium oxygen partial pressure needed to maintain the Cr₂O₃ phase. The addition of 0.1 wt. % MgO increased the sintered density at the same oxygen pressure to 99.8%. Further MgO additions decreased the density. The density of pure MgO was independent of the PO₂ over the range investigated. Addition of Cr₂O₃ to MgO decreased the density at …
Alkali Mobility And Mechanical Relaxation In Mixed-Alkali Silicate Glasses, James W. Fleming Jr.
Alkali Mobility And Mechanical Relaxation In Mixed-Alkali Silicate Glasses, James W. Fleming Jr.
Masters Theses
"Internal friction and sodium and potassium self-diffusion coefficients for (1-X)Na₂O · XK₂O· 3SiO₂ glasses were measured. Alkali diffusion was measured between 300 and 500ºC using radioactive isotopes and a thin-sectioning technique. Internal friction was measured from room temperature to 500ºC, 0.1 to 2000 Hz. Comparison between alkali diffusion and internal friction data for Na-K glasses with those for other mixed-alkali glasses shows that the mixed-alkali peak is related to alkali mobility. It is concluded that the mechanism for mixed-alkali internal friction is a cooperative rearrangement of dissimilar alkali ions, with the slower moving ion controlling the rate of reorientation"--Abstract, page …