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Articles 3931 - 3960 of 4905
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An Analysis Of An Audio Amplifier Utilizing An Operational Amplifier And Negative Feedback, Anthony Francis Lexa
An Analysis Of An Audio Amplifier Utilizing An Operational Amplifier And Negative Feedback, Anthony Francis Lexa
Masters Theses
"An audio amplifier utilizing a monolithic operational amplifier is analyzed. The analysis is a block diagram approach where the amplifier is divided into three parts; operational amplifier, power amplifier, and feedback network. A Fourier series analysis is used to describe the distortion and signal components of the amplifier output. The results of this analysis demonstrate the advantage of large negative feedback on frequency response and harmonic distortion. Using relatively few passive components a high quality audio amplifier is constructed with an output power of 15 watts RMS power and negligible harmonic distortion"--Abstract, page ii.
Analysis Of A Water Level Control, Bhupendra Girdharlal Shah
Analysis Of A Water Level Control, Bhupendra Girdharlal Shah
Masters Theses
"This thesis presents the analysis of a controller for a liquid level control system. The controller was built using an analog computer providing the ability to easily construct up to three modes of control. The controllers analyzed were: 1.) Proportional, 2.) Proportional plus reset, and 3.) Proportional plus reset plus preact. The system was tuned experimentally to provide satisfactory operation and root loci were also plotted to show the system stability for the three modes"--Abstract, page ii.
Calculation Of Optimum Conditions For Simultaneous Heat And Mass Transfer In Porous Membranes, Chia-Chang Liu
Calculation Of Optimum Conditions For Simultaneous Heat And Mass Transfer In Porous Membranes, Chia-Chang Liu
Masters Theses
"The object of this investigation was to study desalination using evaporation through porous membranes and to estimate the economic potential of the method. The major factors affecting the economics were: 1. The saline water temperature into the evaporator, tsl; 2. the temperature driving force in the evaporator, DF; 3. the temperature driving force in the heat exchanger, DTEX; and 4. the saline water temperature leaving the evaporator, ts2. The optimum conditions based on cost of water product were studied by calculating water costs under a wide range of conditions. for any given set of variables t …
Film Boiling From Inclined Flat Surfaces, Charles Ernest Price
Film Boiling From Inclined Flat Surfaces, Charles Ernest Price
Masters Theses
"The object of this investigation was to determine the effect of inclination on the heat transfer for saturated film pool boiling from a flat plate heater. Nitrogen at atmospheric pressure was used as the test fluid. The test plate was oriented at various angles from the horizontal position and the convective film coefficient was determined for each angle. Tests were conducted for heater angles of 0°, 30°, 60°, and 90°. The heater strip was placed in a container of the liquid and was heated electrically. Heat transfer results were obtained for plate temperatures ranging from 100 to 800°F. As the …
Michael Reactions Part Iv Syntheses With Carboalkoxycarbenes, Frederick Ralph Carman
Michael Reactions Part Iv Syntheses With Carboalkoxycarbenes, Frederick Ralph Carman
Masters Theses
"A preliminary investigation has been made involving syntheses with dicarboalkoxycarbenes for the purpose of developing new heterocyclic and alicyclic synthese employing functionalized carbenes. The ultimate goals were the development of a stereospecific synthesis of trans fused and angularly substituted ring systems suitable for conversion to natural products and the development of useful synthetic paths to the azabullvalene system. Although these ultimate goals were not realized, new and improved syntheses of alkyl substituted anisoles and diazomalonic esters, including the first reported synthesis of di-tert-butyl-diazomalonate were accomplished. The addition of dicarboalkoxycarbenes to di-, tri- and tetra- substituted ethylenes, tropilidene and 7-aza-tropilidenes by …
Thermal Fatigue Testing Of Die Casting Die Steels, Kulwant Singh Sabharwal
Thermal Fatigue Testing Of Die Casting Die Steels, Kulwant Singh Sabharwal
Masters Theses
"Thermal fatigue is a form of surface failure produced by repeated thermal stresses and is the main cause of die retirement in the die casting industry. A general review of the fundamental and practical aspects of thermal fatigue as encountered in the dies, based on earlier published work, is given and preliminary experiments in an effort to set up a suitable method of testing to study this phenomenon are then described. In the present technique developed to create the thermal conditions experienced by a die steel in aluminum die casting, a small portion of one face of a cylindrical test-piece …
Static And Dynamic Instability Analysis Of Rigid Frames With Timoshenko Members, Carlton Lee Smith
Static And Dynamic Instability Analysis Of Rigid Frames With Timoshenko Members, Carlton Lee Smith
Masters Theses
"In this thesis, a technique has been developed to determine the natural frequencies of plane rigid frames with the consideration bending, shear deformation, rotatory inertia, and internal axial forces. The internal forces are functions of the instability load of the vibrating system for which the effects of bending and shear deformation on the stability of this structure are considered. For the sake of completeness, the matrix formulations for the dynamic or stability analysis of a rigid frame are given. The stiffness matrices of these formulations are then derived. The influence of shear deformation, rotatory inertia, and internal axial force is …
Vibration Of An Internally Damped Tapered Truncated Cantilever Beam, Chimanbhai Magandas Patel
Vibration Of An Internally Damped Tapered Truncated Cantilever Beam, Chimanbhai Magandas Patel
Masters Theses
"This thesis provides a vibration analysis of an internally damped, tapered, truncated, cantilever beam. Using two formulations of the problem based on: (1) Discrete mass and (2) continuous mass distribution, solutions are given for a beam having square cross section with linear depth and linear width variation. A Kelvin viscoelastic material for the beam is assumed. The vibration of the beam is considered to produce plane stress in the material, and the stress-strain relationship is applied only to the strain in the plane of bending. An exact solution for frequency of oscillation, mode shape, and steady state response is obtained …
A Geochemical Study Of The Maquoketa Formation In Pike County, Missouri, John Siegfried Trapp
A Geochemical Study Of The Maquoketa Formation In Pike County, Missouri, John Siegfried Trapp
Masters Theses
"Statistical interpretation of geochemical data was used to determine the environment of deposition of the Maquoketa Formation in Pike County, Missouri. A cyclic sequence was noted which can be best explained by cyclic climatic changes. During the study it was found that elemental relationships which would be expected in a freshly deposited sediment can be found in core samples. In samples from outcrops and quarry faces these relationships have been destroyed. As these elemental relationships reflect mineralogical relationships, serious doubts have arisen as to the validity of petrographic studies of samples taken from outcrops. This study indicates weathering may be …
Neutron Induced Changes To The Modified Ebers-Moll Transistor Model Used In The Net-1 Program, Kenneth Robert Smith
Neutron Induced Changes To The Modified Ebers-Moll Transistor Model Used In The Net-1 Program, Kenneth Robert Smith
Masters Theses
"The development of theoretical and empirical relations which predict the permanent changes to the electrical characteristics of silicon transistors is described in this paper. Analytical techniques are also developed to obtain the parameters used in the Modified Ebers-Moll transistor model. The method employed is to determine the effects on externally measurable characteristics and to relate these changes to the parameters in the Modified Ebers-Moll transistor model. Further, all nonlinear characteristics are related to the independent variables with interpolating polynomials and degraded characteristics presented. then degraded characteristics are used to establish the parameters for and parameter changes to the transistor model …
A Photoelastic Study Of The Stresses Around An Underground Opening And Its Support System, Alphonse C. Van Besien
A Photoelastic Study Of The Stresses Around An Underground Opening And Its Support System, Alphonse C. Van Besien
Masters Theses
"The stress conditions around openings in rock have long been of interest to the field of rock mechanics. The purpose of this investigation was to determine the stress distribution around an opening with a rib and wall-plate support system. A photoelastic model of the opening (a modified horse-shoe section) was loaded in the centrifuge to determine the effect of body loading. Both the tangential stress and the stress within the rock bench, due to the opening, were determined. The stress conditions within the bench were examined using simulated ribs and a loading frame. Application of the data is discussed, as …
A Study Of Different Types Of Connections To Structural-Steel Square Tubings, Chao-Sheng Chen
A Study Of Different Types Of Connections To Structural-Steel Square Tubings, Chao-Sheng Chen
Masters Theses
"Although square tubular element has long been recognized as an ideal structural member, its acceptance was limited by the lack of detailed knowledge on suitable connections related to this geometric shape. It is structurally inefficient to use a strong column poorly connected to a strong beam. So it is necessary to understand, in advance of adoption, the effect and behavior of different types of connections and to develop an efficient structural system. In this study, the ordinary column-to-beam framing with different types of connections has been investigated. The three types of connections are single-plate connection, double-angle connection, and multi-angle connection. …
Numerical Simulation Of Pressures In A Radical System, Vijender Nath Gopal
Numerical Simulation Of Pressures In A Radical System, Vijender Nath Gopal
Masters Theses
"The time-space location of an advancing front has been described in such a manner as to permit the calculation of frontal pressures when a heterogeneous (in permeability) radial system is subjected to water encroachment. A finite difference application has been developed to calculate these pressures at specified radial distances from the injection or production wellbore. These pressure have been further utilized to predict the pressures at the advancing front for different time intervals"--Abstract, page iii.
A Computerized Method For Finding The Dynamic Response Of Multi-Mass Systems With Damping To Arbitrary Inputs, Bakulesh Balbhadra Patel
A Computerized Method For Finding The Dynamic Response Of Multi-Mass Systems With Damping To Arbitrary Inputs, Bakulesh Balbhadra Patel
Masters Theses
"A practical procedure for the systematic application of Foss's method to the solution of multi-degree-of-freedom damped systems is presented. It is relatively easy to determine the response of classically damped systems to various inputs. For non-classically damped systems the method proposed by K. A. Foss has been employed. This method gives an exact and complete solution for the response of linear multi-mass damped systems subjected to arbitrary inputs. Since the method requires lengthy and complex computations, the use of a digital computer is essential. In order to obtain the complete response of a multi-mass damped system to both sinusoidal and …
A Study On Load Transfer Of Model Friction Piles, Richard Milton Franke
A Study On Load Transfer Of Model Friction Piles, Richard Milton Franke
Masters Theses
"Previous investigations concerned with disturbance of soft clay by driving displacement piles are summarized. The initiation of excess pore water pressures due to pile driving, and mechanisms of load transfer are also described, along with the applicapability of model pile testing in analysis of the various phenomena. Load tests were conducted on assorted sizes of model friction piles embedded in sedimented soil samples with consisted of a silt and clay mixture. Pilot holes of various diameters were cut in the samples. A theoretical load distribution curve was used to calculate the load transferred to the soil as a function of …
Plastic Analysis Of Beam - Columns, Ning-Cheng Tsao
Plastic Analysis Of Beam - Columns, Ning-Cheng Tsao
Masters Theses
"The results of an analytical study of the inelastic deformation of a wide-flange steel beam-column are presented. Emphasis has been placed on the influence of axial thrust on the pinned-end beam-column subjected to equal end moments with opposite direction. For this type of beam-column behavior, the relationship between the applied moment, axial load, and resultant curvature for the region in the plastic range has been studied in this investigation"--Abstract, page ii.
Determination Of Distillation Efficiencies For The Water-Methanol-Acetone System, Chorng Shyong Wang
Determination Of Distillation Efficiencies For The Water-Methanol-Acetone System, Chorng Shyong Wang
Masters Theses
"A pilot-scale, eight-plate, bubble-cap distillation tower with a multi-point temperature recorder and automatic sampling device was used to obtain operating data on temperatures and liquid phase compositions for distillation efficiency studies. The tower was run with a single feed, a total condenser, and a partial reboiler. At steady state, as indicated by constant temperatures, samples were taken and later analyzed by gas chromatography. A digital program was developed to calculate component efficiencies on each plate according to Holland's modified Murphree plate efficiency, utilizing the operating data, and reflux rate, the input and output flows and compositions, and vapor-liquid equilibrium data. …
Investigation Of Free Convection Heat Transfer From An Inclined Flat Plate, Phairojna Sang-Urai
Investigation Of Free Convection Heat Transfer From An Inclined Flat Plate, Phairojna Sang-Urai
Masters Theses
"The experimental investigation was conducted to determine temperature distribution and convective heat transfer coefficients in terms of Nusselt number for an inclined heated flat plate in air. The heated surface of the aluminum flat plate was set facing upward and moved through seven positions from the vertical to the horizontal. The investigation shows that the local Nusselt number can be predicted by Kiekus's solution within 12 per cent for inclination angles from the vertical through 75° from the vertical. In the case of the vertical position, Eckert's solution gives a better prediction. For the horizontal position the results show good …
Effect Of Axial Mixing In Gas Absorption, Sundareswaran Parameswaran Iyer
Effect Of Axial Mixing In Gas Absorption, Sundareswaran Parameswaran Iyer
Masters Theses
"The effect of axial mixing in the liquid phase on the performance of a gas absorption column was studied using the experimental data of Michael Brittan for the carbon dioxide and water system. In this study, piston flow conditions were assumed for the gas phase. A one-parameter mathematical model, which characterized the flow regimes in both the gas and the liquid phases undergoing plug flow conditions, was first curve fitted for its unknown parameter (i.e. the Number of Transfer Units) by a non-linear regression analysis procedure. The "AAPD" (i.e. the Average Absolute Percentage Deviation between the predicted value of the …
Trace Element Anomalies In The Igneous Wall Rocks Of Hydrothermal Veins In The Searchlight District, Nevada, Zuhair Al-Shaieb
Trace Element Anomalies In The Igneous Wall Rocks Of Hydrothermal Veins In The Searchlight District, Nevada, Zuhair Al-Shaieb
Masters Theses
"Two hundred and fifty vein and wall rock samples were collected from Chief of the Hill and the Duplex Mines of Searchlight District, Nevada. The samples were collected along lines approximately normal to the veins. They were analyzed for lead, copper, zinc, silver, gold, arsenic, selenium, and molybdenum using neutron actication analysis and atomic absorption spectrophotometry. Gold, silver, copper, lead and zinc show well-developed anomalies in the wall rocks. In most cases, the concentration of these elements decreases gradually with increasing distance from the vein and reaches background values at a distance of 40-120 feet from the vein. Molybdenum and …
Characteristics Of Adults Enrolled In The Kalamazoo Public Schools Adult High School Program, Walter W. Fiebig
Characteristics Of Adults Enrolled In The Kalamazoo Public Schools Adult High School Program, Walter W. Fiebig
Masters Theses
No abstract provided.
The Construction Of A Portable Hologram Camera, Michael Bruce Elzinga
The Construction Of A Portable Hologram Camera, Michael Bruce Elzinga
Masters Theses
No abstract provided.
An X-Ray Diffraction Study By The Powder Method Of Solid Solutions In The System Zno-Cro3-H2O At 25° C, William Alan Livingston
An X-Ray Diffraction Study By The Powder Method Of Solid Solutions In The System Zno-Cro3-H2O At 25° C, William Alan Livingston
Masters Theses
No abstract provided.
Spectrophotometric Studies Of Complex Formation Of Alpha Aminohydroxamic Acids, Jing Shyong Chen
Spectrophotometric Studies Of Complex Formation Of Alpha Aminohydroxamic Acids, Jing Shyong Chen
Masters Theses
No abstract provided.
The Accumulation And Retention Of Radiophosphorous By Escherichia Coli, Douglas Gunnison
The Accumulation And Retention Of Radiophosphorous By Escherichia Coli, Douglas Gunnison
Masters Theses
No abstract provided.
An Investigation Into The Effects Of A College Level Alcohol Education Course On The Implementation Of Alcohol Education Instruction, Ross G. Lane
Masters Theses
No abstract provided.
Using An Inquiry Technique In Seventh Grade Science, Lamoine L. Motz
Using An Inquiry Technique In Seventh Grade Science, Lamoine L. Motz
Masters Theses
No abstract provided.
A Statistical Analysis Of The Factors Influencing Student Achievement And Instructional Effectiveness In The Audio-Tutorial Biological Science Program At Western Michigan University, William Lawrence Wissinger
A Statistical Analysis Of The Factors Influencing Student Achievement And Instructional Effectiveness In The Audio-Tutorial Biological Science Program At Western Michigan University, William Lawrence Wissinger
Masters Theses
No abstract provided.
An Analysis Of General Patterns And Variations In The Occurrence Of Wet And Dry Days In Benton Harbor, Michigan, Linda Rae Dalrymple
An Analysis Of General Patterns And Variations In The Occurrence Of Wet And Dry Days In Benton Harbor, Michigan, Linda Rae Dalrymple
Masters Theses
No abstract provided.
Defensive Football, John H. Mcavoy