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Interactive Three Dimensional Computer Graphics Simulation Of The Kinematics Of The Human Thumb (Biomechanics, Functional Anatomy, Skeletal Kinematics)., William Leslie Buford Jr
Interactive Three Dimensional Computer Graphics Simulation Of The Kinematics Of The Human Thumb (Biomechanics, Functional Anatomy, Skeletal Kinematics)., William Leslie Buford Jr
LSU Historical Dissertations and Theses
This dissertation describes the development of a computer graphical simulation of thumb kinematics as a clinical design tool. The simulation utilizes a realistic data structure of the thumb bones, an optimized model of joint kinematics, and a variety of experimental cadaver measurements. It was developed with a concurrent processing arrangement in which graphical transformations and interactive manipulations are handled on a distributed graphics system, and musculoskeletal dynamics calculations are carried out on a minicomputer. The thumb simulation includes interactive entry of patient related data, simulation of two types of tendon transfer operations, calculation and display of resultant muscle mechanics during …
The Velocity And Shape Of Gas Slugs Rising In Vertical Tubes And Rectangular Slots., Henry Valma Nickens
The Velocity And Shape Of Gas Slugs Rising In Vertical Tubes And Rectangular Slots., Henry Valma Nickens
LSU Historical Dissertations and Theses
The rise of a large gas bubble, or slug, through a closed, vertical, liquid-filled channel of infinite length has been investigated by means of potential flow theory. Three channel geometries are considered: (1) the circular tube, (2) the two-dimensional rectangular channel and (3) the three-dimensional rectangular slot. The effect of inter- facial surface tension is explicitly accounted for by application of the Kelvin-LaPlace equation, thus making the bubble shape an integral part of the solution. For the circular tube of radius R and diameter D, the solution is expressed in terms of the Stokes Stream Function which consists of an …
High Temperature Drying And Tempering Of Parboiled Rice And Effects On Grain Quality., Lakshman Velupillai
High Temperature Drying And Tempering Of Parboiled Rice And Effects On Grain Quality., Lakshman Velupillai
LSU Historical Dissertations and Theses
A study of high temperature drying and tempering of parboiled rice was undertaken to evaluate the effects on grain quality. Thirtysix treatments, with three levels of air temperature, three levels of moisture (of rice after exposure in the dryer), and four levels of tempering, were performed on Saturn variety, medium grain rice, parboiled under fixed conditions. The dried and tempered rice samples were then moisture equilibrated under room conditions and subjected to standard milling procedures. Analyses were performed to evaluate color, texture, protein, and strength characteristics of the milled rice. A time-based study of kernel hardness and strength properties was …
Hydrocracking Of Model Coal Derived Liquid Components Over A Zeolite Catalyst. (Volumes I And Ii) (Fluorene, Decalin)., William David Constant
Hydrocracking Of Model Coal Derived Liquid Components Over A Zeolite Catalyst. (Volumes I And Ii) (Fluorene, Decalin)., William David Constant
LSU Historical Dissertations and Theses
Hydrocracking of fluorene was investigated over a nickel loaded Y zeolite in a fixed bed flow reactor using decalin as a donor solvent. This system served as a model for typical commercial donor solvent operations in order to develop a representative kinetic model and propose a reaction mechanism for refining of coal derived liquids. After performing a qualitative investigation, base operating conditions of 661(DEGREES)K, 14.8 bar total pressure, 20 weight percent fluorene in decalin and a hydrogen to hydrocarbon ratio of 42 at a space-time of 4.8 seconds were established for the process. For each experimental series, the variable of …
High Temperature Combustion Of Selected Chlorinated Hydrocarbons., David Leslie Miller
High Temperature Combustion Of Selected Chlorinated Hydrocarbons., David Leslie Miller
LSU Historical Dissertations and Theses
A study combining ignition delay measurements and quenched product distributions from shock-tube experiments with chlorinated hydrocarbons has been conducted to develop a better understanding of the combustion characteristics of these compounds which are candidates for incineration. The ignition delay times of selected C(,1), C(,2) and C(,6) chlorinated hydrocarbon- stoichiometric oxygen mixtures have been measured behind reflected shock waves at a pressure of 1.8 atm over the temperature range 1200-1700K. Studies were also conducted with mixtures of chlorinated and nonchlorinated hydrocarbons to examine the effect of chlorine atom/hydrogen atom ratio on ignition delay behavior. The results indicate that contrary to conventional …
Mechanical And Chemical Conditioning As An Aid In Hastening Drying Rate Of Ryegrass Forage., Marcel Tsang Mui Chung
Mechanical And Chemical Conditioning As An Aid In Hastening Drying Rate Of Ryegrass Forage., Marcel Tsang Mui Chung
LSU Historical Dissertations and Theses
Laboratory tests were conducted to evaluate four types of mechanical, two types of chemical and combinations of mechanical-chemical conditioning treatments on drying rate and quality of ryegrass forage. Mechanical treatments ranged from cuticle abrasion to crushing of the stems while the chemicals were expected to remove or disrupt epicuticular waxes. The statistical design was a randomized block with two observations per cell. Analysis of variance results yielded highly significant block-treatment interaction for all variables examined. Two types of drying pattern were indicated. For treatments restricted to the plant surface as caused by the brushes and chemicals, the drying pattern was …
Characterization Of Iron-Ruthenium Bimetallic Catalyst Systems (Methanation, Moessbauer, Zeolite)., M. Mehdi Akbarnejad
Characterization Of Iron-Ruthenium Bimetallic Catalyst Systems (Methanation, Moessbauer, Zeolite)., M. Mehdi Akbarnejad
LSU Historical Dissertations and Theses
Due to the potential of iron-ruthenium bimetallic heterogeneous catalysis in a number of high demand, energy related processes, this study was undertaken to synthesis and characterize a series of bimetallic Iron-Ruthenium alloy and clusters. A material science approach was taken which relies on the physical and chemical characterization of catalyst material itself rather than the classical chemical kinetics investigation of the catalytic reaction. Various methods have been employed for the determination of surface and bulk properties of catalysts during dehydration-hydration, and oxidation-reduction treatments. In the case of the bimetallic systems, the use of ('99)Ru and ('57)Fe double labelled Mossbauer experiments …
The Investigation Of Methanation Kinetics Over Ruthenium And Iron-Ruthenium Bimetallic Catalysts., Krisda Chirapongse
The Investigation Of Methanation Kinetics Over Ruthenium And Iron-Ruthenium Bimetallic Catalysts., Krisda Chirapongse
LSU Historical Dissertations and Theses
The catalytic properties of Ru and Fe-Ru bimetallics supported on Y-Zeolite were determined for the CO hydrogenation reaction. The results, based on the reaction at 523 K and an H(,2):CO ratio of 3:1, revealed that the addition of Fe to Ru effectively reduces the number of both H(,2) and CO active sites as determined by chemisorption experiments. Based on H(,2) chemisorption, the dispersion (number of active sites per total number of metal atoms) decreased from 0.59 with no Fe present to 0.02 with 5.9% Fe. This phenomenon was substantiated by the ESCA analysis which indicated totally reduced Ru metal particles …
A Study Of The Texture Measurement Definition Problem (Image Analysis)., Ramon Emilio Vasquez-Espinosa
A Study Of The Texture Measurement Definition Problem (Image Analysis)., Ramon Emilio Vasquez-Espinosa
LSU Historical Dissertations and Theses
The problem of texture measurement definition is studied. A theory is presented in order to overcome the problem. This theory includes a conceptual framework for the general measurement definition problem. This framework is based on the concepts of a perceptual transform, a perceptual space, a measurement transform and a similarity transform. Using this conceptual framework and a particular choice for the similarity transform, a set of requirements are defined. These requirements can be used to create a formal method for defining measurements off the GLC matrices. The formal procedure is based on preserving perceptual relationships among textures. To apply this …