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Fracture Initiation In Viscoelastic Solids, James A. Elsing
Fracture Initiation In Viscoelastic Solids, James A. Elsing
Electronic Theses and Dissertations
The subject of this paper is to derive generalized analytical expressions to predict fracture in viscoelastic polymer materials. To aid in understanding behavioral characteristics of viscoelastic materials, a basic background of viscoelastic models and their responses are presented and briefly discussed. Fracture from two types of cracks are considered; the first 1s a penny-shaped crack in a three-dimensional solid and the second is a crack the thickness of the material in a two-dimensional solid. Except for the constants, the same equations describe fracture in both 2-D and 3-D solids. The fracture equations were developed using expressions from Sneddon, Wnuk, Griffith …
A Multi-Item Inventory Model, Ramakrishnan Krishnan
A Multi-Item Inventory Model, Ramakrishnan Krishnan
Electronic Theses and Dissertations
During the last fifteen years there has been a rapid growth of interest in scientific inventory control; the use of mathematical models to obtain rules for operating inventory systems. The subject has attracted such wide interest that today every serious student in the Industrial Engineering and related fields is expected to have had some experience with inventory models. Originally, the development of inventory models had practical applications as an immediate objective. Today, inventory models are being developed at many different levels, ranging from the direct application in practical problems to the development of abstract mathematical models. The earliest derivation of …
The Quadratic Reciprocity Law : Gauss's First Proof, William Burt Cooper
The Quadratic Reciprocity Law : Gauss's First Proof, William Burt Cooper
Electronic Theses and Dissertations
No abstract provided.
The Use Of Allusions In Shakespeare's Mature Comedies / By Richard Dee Utley, Richard Dee Utley
The Use Of Allusions In Shakespeare's Mature Comedies / By Richard Dee Utley, Richard Dee Utley
Electronic Theses and Dissertations
No abstract provided.
The Simple Continued Fraction Expansion Of E / By Edmund Warren Taylor, Edmund Warren Taylor
The Simple Continued Fraction Expansion Of E / By Edmund Warren Taylor, Edmund Warren Taylor
Electronic Theses and Dissertations
No abstract provided.
A Feasibility Model For Farm Supply Firm Mergers, Donald R. Schwartz
A Feasibility Model For Farm Supply Firm Mergers, Donald R. Schwartz
Electronic Theses and Dissertations
South Dakota is currently witnessing a revolutionary change in its elevator-farm supply industry. Technology applied in all phases of the industry -- production, processing, and distribution -- has had an impact upon the structure of the industry. Some of the changes taking place within the industry have been fostered by changes in other sectors of the economy. Employment opportunities and increasing wage rates have provided many marginal firm operators more favorable alternatives outside the elevator-farm supply business. Simultaneously, economic growth has encouraged new investments in larger grain handling and farm supply firms, thus hastening the adoption of technological developments. These …
Shrinkage Stresses In Soil-Cement Slab : Elastic And Viscoelastic Analysis / By Bal Krishan Sanan, Bal Krishan Sanan
Shrinkage Stresses In Soil-Cement Slab : Elastic And Viscoelastic Analysis / By Bal Krishan Sanan, Bal Krishan Sanan
Electronic Theses and Dissertations
No abstract provided.
Quasi-Block-Stochastic Matrices, William Raymond Balch
Quasi-Block-Stochastic Matrices, William Raymond Balch
Electronic Theses and Dissertations
No abstract provided.
The Effect Of Activity On Musical Preferences, Thomas Howard Bearden
The Effect Of Activity On Musical Preferences, Thomas Howard Bearden
Electronic Theses and Dissertations
No abstract provided.
The Transcendence Of [Pi], Paula Ray Dunnam
The Transcendence Of [Pi], Paula Ray Dunnam
Electronic Theses and Dissertations
No abstract provided.
An Investigation And Comparison Of The Music Education Techniques Developed By Emile Jaques-Dalcroze, Carl Orff, Zoltan Kodaly, And Schinichi Suzuki, Glenda Broughton Jones
An Investigation And Comparison Of The Music Education Techniques Developed By Emile Jaques-Dalcroze, Carl Orff, Zoltan Kodaly, And Schinichi Suzuki, Glenda Broughton Jones
Electronic Theses and Dissertations
No abstract provided.
Analysis Of A Balanced Microwave Mixer, Timothy James Murray
Analysis Of A Balanced Microwave Mixer, Timothy James Murray
Electronic Theses and Dissertations
No abstract provided.
A Solution To The Particle Equations Of Motion Arising In Exterior Ballistics Using The Concepts Of Radau And Mayevski, Robert Edward Nelson
A Solution To The Particle Equations Of Motion Arising In Exterior Ballistics Using The Concepts Of Radau And Mayevski, Robert Edward Nelson
Electronic Theses and Dissertations
No abstract provided.
Browning's The Ring And The Book : Optical, Prism, And Color Imageries / By Sharon A. Tracey, Sharon A. Tracey
Browning's The Ring And The Book : Optical, Prism, And Color Imageries / By Sharon A. Tracey, Sharon A. Tracey
Electronic Theses and Dissertations
No abstract provided.
A Study Of The Problems Of Arranging Multipiece Compositions Ofsculpture Without Using Common Base / Williams Arthur Lee, Arthur Lee Williams
A Study Of The Problems Of Arranging Multipiece Compositions Ofsculpture Without Using Common Base / Williams Arthur Lee, Arthur Lee Williams
Electronic Theses and Dissertations
No abstract provided.
Food Habits Of Snakes In An East Texas State Fish Hatchery, John L. Malloy
Food Habits Of Snakes In An East Texas State Fish Hatchery, John L. Malloy
Electronic Theses and Dissertations
A study was conducted from 1 August 1969 to 1 August 1970 in the Jasper State Fish Hatchery near Jasper, Texas to determine the amount of predation by snakes on fish being propagated. The hatchery consisted of 63 earthen ponds. A total of 373 snakes were captured. Results of stomach contents analyses of the 206 snakes containing food were calculated in per cent frequency of occurrence and per cent volume. Frogs, primarily Ranidae, were found to be the major food item. Fish were taken far less frequently, representing only 13.3 % (by volume) and 15.5 % frequency of occurrence. The …
Temperature And Concentration Dependence Of The N,N'-Diphenylformamidine And N,N'-Diphenylacetamidine And Related Compounds As Shown By Infrared Spectroscopy, Edward Mcsherry Williams
Temperature And Concentration Dependence Of The N,N'-Diphenylformamidine And N,N'-Diphenylacetamidine And Related Compounds As Shown By Infrared Spectroscopy, Edward Mcsherry Williams
Electronic Theses and Dissertations
No abstract provided.
Reflections On The Construction Of Thin Film Dielectric Mirrors, Martin Frederic Wehling
Reflections On The Construction Of Thin Film Dielectric Mirrors, Martin Frederic Wehling
Electronic Theses and Dissertations
No abstract provided.
Effects Of Aldrin On Young Pen-Reared Pheasants, Joseph Edward Hall
Effects Of Aldrin On Young Pen-Reared Pheasants, Joseph Edward Hall
Electronic Theses and Dissertations
Three levels of encapsulated aldrin (.05, 1.0, and 1.5 mg) were administered weekly to young pen-reared pheasants from 5 to 11 weeks of age to determine effects on growth and residue levels in brain, feathers, and whole body during and after treatment. During treatment, birds were weighed weekly. After treatment ceased, birds were weighed every other week until 21 weeks of ---. Analysis of residues was by electron capture gas chromatography. Growth of pheasants --- 5 to 21 weeks of age was depressed (P 0.01) by administration of aldrin dosages of 1.0 to 1.5 mg. Aldrin values in the brain …
Effect Of Ductility On Initiation And Spread Of Fracture In Solids, Tien Yu Hsieh
Effect Of Ductility On Initiation And Spread Of Fracture In Solids, Tien Yu Hsieh
Electronic Theses and Dissertations
The pioneer A. A. Griffith (1921), led by Inglis' idea (1913) of stress distribution around an elliptical void, set up the fundamental theory of rupture and flow in solids for the contemporary scientists in the field of fracture mechanics. Today his theory is the well known Griffith fracture criterion extensively used in investigation and explanation of fracture phenomena. Two of the recent researchers who contributed substan-tially to the field of fracture mechanics are I. N. Sneddon (1946) and R. Sack (1948). They have both derived expressions for the critical stress around a three dimensional penny-shaped crack. In addition, Sneddon found …
Scattering Parameters Of Vhf Semiconductor Devices, Young Dae Kim
Scattering Parameters Of Vhf Semiconductor Devices, Young Dae Kim
Electronic Theses and Dissertations
Since Campbell and Foster first used scattering parameters in studying the properties of ideal transformer networks, much work has been done with scattering parameters in the analysis of microwave circuits and general lumped parameter networks. An excellent summary for micro wave circuits appears in Montgomery Dicke, and Purcell. Application of scattering parameters to network synthesis was attempted by Oono and Yasuura. Youla also extended scattering parameter theory by complex normalization. He and Penfield5 later applied scattering parameters in analyzing negative resistance amplifiers in ·conjunction with the development of the tunnel diode. The rapid development of high-frequency technologies in the past …
Mathematical Modelling Of A First Order Transducer, Vijaykumar S. Monie
Mathematical Modelling Of A First Order Transducer, Vijaykumar S. Monie
Electronic Theses and Dissertations
First chapter lays the ground work for this research paper. The problem is posed immediately, enabling the reader to gain a better appreciation of the material that follows. The next article explains the thought process that motivated this problem. This is followed by reviewing the available. literature in the field and on which the author has relied quite extensively. The chapter concludes by explaining the more common terminology which will be used frequently throughout the dissertation. Given a configuration of linear, passive network elements, termed filter, how faithful a reproduction of the input process is the process at the output …
Signal Attenuation In V.H.F. Biotelemetry, John Schmelzer
Signal Attenuation In V.H.F. Biotelemetry, John Schmelzer
Electronic Theses and Dissertations
In this paper, the change in loop resistance is examined when the loop is placed at the center of a spherical air cavity which is in turn surrounded by a sphere of physiological saline solution, as shown. The functional dependence of the magnitude of the dissipation resistance on the cavity radius will be studied. The validity of introducing a dissipation resistance will be experimentally tested by immersing a loop in a physiological saline solution and directly measuring the change in resistance with an r.f. bridge. Once the increase in resistance is established, the resultant reduction in radiated power will be …
An Eye-Movement Analysis Of Five Ink Colors Printed On Yellow Stock, Robert Charles Clappsy
An Eye-Movement Analysis Of Five Ink Colors Printed On Yellow Stock, Robert Charles Clappsy
Electronic Theses and Dissertations
The use of color combinations of print and paper by commercial printers has increased steadily since 1930. The relation of color-of-print to color-of-background is an important factor to be considered in printing because color does effect legibility. The increased use of color emphasizes the need for scientific knowledge concerning the effect on legibility of various color combinations of print and background. Such scientific knowledge demands relevant research in many areas of color printing. This study will try to determine the effects on eye-movements of various ink colors printed on a controlled yellow stock. This information would be useful to printers …
An Adaptive Redundancy Reduction Technique, Seon J. Chung
An Adaptive Redundancy Reduction Technique, Seon J. Chung
Electronic Theses and Dissertations
In telemetry systems, the limited power available from the RF transmitter imposes a constraint on the data transmission rate. For example, a spacecraft’s ability to communicate with a ground receiving station decreases with the square of the distance, and electrical power to operate the system increases with the data transmission rate. To solve this problem, considerable attention has been devoted toward improving the efficiency of telemetry systems by selecting advantageous coding, modulation and reconstruction techniques. One technique which is used to achieve this goal is to design a telemetry system which transmits only the significant information contained in the source …
A Comparison Of The Effect Of Overt And Covert Responses On The Retention Of Programed Material, Gary Merriam
A Comparison Of The Effect Of Overt And Covert Responses On The Retention Of Programed Material, Gary Merriam
Electronic Theses and Dissertations
It is the purpose of this study to help in the resolution of some of these questions by determining if the type of response made to programed material has any effect on the retention of the material. If, as was mentioned earlier, learning is the result of stimuli transmitted through the senses to the brain, it seems logical that the more senses involved in transmitting the stimuli to the brain the more effective and efficient the learning process will be. It is the hypothesis of this study that a person responding to programed material by having to think what the …
Dissolved Oxygen Concentration In The Big Sioux River Downstream From Sioux Falls, South Dakota, During Winter Conditions, Bernard Emerson Poppenga
Dissolved Oxygen Concentration In The Big Sioux River Downstream From Sioux Falls, South Dakota, During Winter Conditions, Bernard Emerson Poppenga
Electronic Theses and Dissertations
The Big Sioux River originates in northeastern South Dakota and in general flows southward to Sioux City, Iowa, where it joins the Missouri River. A major portion, 69 percent, of the Big Sioux River Basin is located in South Dakota. The remaining 31 percent of the basin's 9,570 square miles is distributed almost equally between the states of Iowa and Minnesota. The climate of the Big Sioux River Basin is described as midcontinental, subhumid, and with rapid fluctuation of temperature. Temperatures of over 100° Fare not uncommon during summer months and temperatures frequently fall below 0° F during the winter …
Elastic Stress Distribution In Square Plates Weakened By A Large Central Elliptical Or Circular Notch, Sameh M. Kanan
Elastic Stress Distribution In Square Plates Weakened By A Large Central Elliptical Or Circular Notch, Sameh M. Kanan
Electronic Theses and Dissertations
The main objective for this investigation is to examine the applicability of the finite difference method in obtaining the elastic stress distribution in a square plate weakened by a large elliptical or circular notch. A square mesh is used with maximum subdivisions as allowed by the storage capacity of the computer available at South Dakota State University. The nodal points of the mesh are placed in such a way as to give an approximate outline of the circular or elliptical shape. The plates under study are simply supported along two edges and free along the other two, and subjected to …
Ecology Of The Black-Footed Ferret And The Black-Tailed Prairie Dog, Robert G. Sheets
Ecology Of The Black-Footed Ferret And The Black-Tailed Prairie Dog, Robert G. Sheets
Electronic Theses and Dissertations
Research involving the black-footed ferret (Mustela nigripes) and black-tailed prairie dog (Cynomys ludovicianus) was conducted during 1968 and 1969. Eighteen prairie dog burrows were excavated in 1968 and 1969. Burrow systems ranged from 13 to 109 feet long and 3 to 14 feet deep. Fifteen of the burrows exhibited dome-shaped entrances leading to a gradually descending passageway which made an abrupt vertical ascent to a crater-shaped entrance. Nest chambers were found in 6 burrows. Earthen plugs created by prairie dogs in burrows after ferret departure ranged from 9 to 33 feet long. Eighty-two ferret scats were recovered. Animal remains found …
Pheasant Use And Waterfowl Production On State And Private Lands, Charles R. Elliott
Pheasant Use And Waterfowl Production On State And Private Lands, Charles R. Elliott
Electronic Theses and Dissertations
Ring-necked pheasant (Phasianus colchicus) use on state-owned game production areas was compared to that on privately-owned areas in east-central South Dakota. Four 80-acre and four 160-acre tracts of state lands were paired with private areas of the same size having the same amount of wetland and were selected from aerial photographs taken before the purchase of the state-owned areas. None of four nests were successful on private areas in 1968 and three of five nests were successful on game production areas. In 1969 three of 19 nests were successful on private areas and 10 of 21 nests were successful on …