Digital Commons Network^™

A Practical Approach To The Exhaust Silencing Of A Pneumatic Rock Drill, Morton Gary Barth

Masters Theses

"One-third octave spectrum analyses of the exhaust noise produced by a medium sized pneumatic rock drill were obtained during free recriprocation to determine the most troublesome bands of noise. Noise reduction techniques were then used to design exhaust mufflers which would reduce the level of the exhaust noise to an acceptable level with a minimum increase in back pressure. The prototype mufflers evaluated included an expansion chamber, a resonator, and various modified expansion chambers. One of the modified expansion chambers tested provided very good attenuation reducing the exhaust noise from 113 dBA to 87 dBA at the operator's ear position. …

Use Of Glass Separated From Municipal Refuse In Asphaltic Concrete, Thomas Eugene Keith

Masters Theses

"The recent interest in municipal refuse recycling has brought about the development of several systems for separation of the refuse into components. One of the components reclaimed is a glass-rich fraction which, although primarily glass, contains various non-glass materials which the system is not able to remove. Clean waste glass can be used as an asphaltic concrete aggregate, and it would be desirable to use this glass-rich fraction in a similar manner. However, the effect, if any, of the non-glass components on the properties of an asphaltic mixture must be determined in order to utilize the glass-rich fraction with a …

An Analysis Of Single Wire Earth Return (Swer) System For Rural Electrification, Balwinder Singh Samra

Masters Theses

"The primary objective of this investigation was to determine the general applicability of Single Phase Earth Return(SWER) system for rural electrification where the load density is low, for example electrification of farms and small villages in emerging nations. The limitations of SWER system of distribution are many and it is necessary to make judicious use of such transmission. In this investigation the construction costs of transmission and distribution by SWER system is compared with single phase and three phase systems for loads of 25KVA and 50KVA. Phase converters are required to operate a three phase motor on a single phase …

Managerial Appraisals - A Systems View, James Thomas Hatlan

Masters Theses

"In the past decade much has been written concerning the performance appraisal which can be defined as the systematic analysis of the individual with respect to his performance on the job. The appraisal's importance lies in the fact that its impact is felt in the areas of control, promotion, and managerial development all of which are essential for the progressive firm. This study is an attempt to offer something new and something different. The author offers a systematic study of industry in general with specific help from key corporations and utilities. His investigations encompass the three elements of appraising and …

Experimental Study Of Neutron Reflection From A Cylindrical Surface, Dale Lee Holtzscher

Masters Theses

"The reflection patterns for an elliptical neutron beam impinging upon cylindrical and planar surfaces were measured. The flux intensity as a function of distance from the surface of either planar or cylindrical reflectors decreased monotonously with distance. No "focusing" of the neutron beam appeared in the case of the cylindrical reflectors but the flux did not decrease as rapidly as in the planar case. For the elliptical neutron beam the experimentally determined neutron flux distribution agrees with calculation"--Abstract, page ii.

Experimental Studies Of Supporting Wire Disturbances In The Near Viscous Wakes Of Slender Supersonic Bodies, Kenneth Anthony Mirly

Masters Theses

"Wires have often been used as a means of mechanically supporting a model so that its wake will be relatively free of support interference. Such support systems have many advantages over stings and are less costly than magnetic suspension systems. Investigations into the disturbances caused by these supporting wires have been carried out with the use of a two-dimensional flat plate and a wire supported slender cone. The tests were conducted in the University of Missouri-Rolla axisymmetric, supersonic wind tunnel at Mach 3.15, and at a Reynolds number of 2.14 X 10⁶ per inch. Schlieren photography, pitot and static pressure …

Analysis And Measurement Of A Zener Diode Voltage-Reference, Armond C. Maxeiner

Masters Theses

"Output voltage sensitivity equations are derived for a zener voltage-reference circuit. The circuit consists of a DC-DC converter, a voltage-resistor current generator, and a zener diode. The performance of the voltage-reference is calculated using the sensitivity equations and compared to measurement data taken from a laboratory model of the circuit. The results are in reasonable agreement.

It was concluded that with careful selection of components, two of three major sources of error can be predicted and controlled; these are changes due to input voltage and changes due to temperature. The third, changes due to time, requires calibration against a voltage …

Effect Of Glass Aggregates Upon Abrasiveness Of Asphaltic Mixtures, Dwarka Prasad Gupta

Masters Theses

"The utilization of glass as an aggregate in asphaltic concrete pavements has been suggested as a means for reusing the increasing amounts of waste glass generated each year in the United States. Recent studies have shown that asphaltic mixtures containing glass aggregates can be designed to meet Marshall requirements for stability, flow and void content but the abrasiveness of mixtures containing glass aggregates had not been investigated. The objectives of this study were to develop a laboratory wear testing apparatus and compare the abrasiveness of asphaltic concrete mixtures using glass aggregates with the abrasiveness of mixtures using several different conventional …

The Kalamazoo County Community Action Program A Qualitative Analysis, Michael Carl Allerding

Masters Theses

No abstract provided.

Drug Use And Abuse: Suggestions For Teaching In The Junior High School, Ardiccio Daniel Morales

Masters Theses

No abstract provided.

Exploring The Role Of Various Education Strategies In National Economic Development, Donald F. Depew

Masters Theses

No abstract provided.

Schedule-Induced Polydipsia And Operant Licking: Effects Of Chlorpromazine, Methamphetamine And Secobarbital, Paul Tobin Maginnis

Masters Theses

No abstract provided.

The 46th Street Site And The Occurrence Of Allegan Ware In Southwestern Michigan, Margaret B. Rogers

Masters Theses

The 46th Street site is located on a steep bank twenty feet above the Kalamazoo River in the Allegan State Forest in Allegan County, Michigan. Radiocarbon dates indicate that the site was occupied about A. D. 1200. The settlement pattern and ecological data for the 46th Street site points to the conclusion that this was a winter hunting camp of the Chippewa type. A comparison of the pottery from the 46th Street site with the pottery from the Fenneville site which is located in Manilus Twonship, Allegan County and dates from about A. D. 700, yields some interferences about variation …

Report Of Internship Experiences, Richard V. Yenchesky

Masters Theses

No abstract provided.

Patient Contributions To A Therapeutic Environment: Use Of Patients As Behavioral Assistants In Occupational Therapy Settings, James Paul Mac Cormack

Masters Theses

No abstract provided.

Comprehension Of Speech As A Function Of Rate, Mary D. Berry

Masters Theses

No abstract provided.

Adaptation To The Functional Loss Of Pinnae In Sound Localization Ability, Marvin Richard Navarro

Masters Theses

No abstract provided.

An Experience With School Administration In The City Of Grand Rapids, Gerald L. Siegel

Masters Theses

No abstract provided.

Effects Of Vicarious Feedback And Social Model Type Upon Cumulative Verbalization And Personal Pronoun Frequency, Louis F. Caputo

Masters Theses

No abstract provided.

A Study Of The Materials Used In The Teaching Of Reading By Teachers With And Without A Library-Media Center With A Full-Time Media Specialist, Mary Ann Paulin

Masters Theses

No abstract provided.

A Process Study: Developing An Elementary Language Arts Guide, Norma Korn

Masters Theses

No abstract provided.

Participation Of The Renin-Angiotensin System In The Control Of Vascular Capacity During Hemorrhagic Hypotension, James Robert Powell

Masters Theses

Introduction

Review of the Literature

Severe hypotension has long been held as being one of the most potent stimuli for activation·of the mechanisms responsible for circulatory homeostasis. It has been accepted that the most immediate response to hypotension involves activation of the autonomic nervous system causing an increased vascular tone. In addition to various neurogenic mechanisms that function to cause an increase in vascular tone, several humeral mechanisms have also been implicated.

Rocha e Silva and Rosenberg (1969) described the release of vasopressin (ADH) from the posterior lobe of the pituitary in response to hemorrhage in the dog. They postulated …

A Biosystematic Study Of Cacalia Atriplicifolia L. With Emphasis On Its Life History, Tso Pen Chang

Masters Theses

No abstract provided.

Auditory Evoked Potentials: Relationship To Stimulus Intensity And Effects Of Noise Exposure, Judith Lyn Buelke

Masters Theses

No abstract provided.

Making Friends: An Inquiry Into The Nature Of Initial Friendship Formation, Richard Svetlaukas

Masters Theses

No abstract provided.

Galvanic Skin Response As A Function Of Evaluative Message Content, Mode Of Transmission, And Personality Traits, Richard W. Robinson

Masters Theses

No abstract provided.

A Comparative Mmpi Study Of Alcoholism And Criminal Behavior, Rudolf H. Stahlberg

Masters Theses

No abstract provided.

The Cumulative Effect Of Teachers' Racial Identities On Black Students: An Eight Year Study, Karen Van Wagner

Masters Theses

No abstract provided.

Strength Of Conditioned Reinforcement In Chain Schedules: The Effect Of Altering Minimum Time To Reinforcement, Robert P. Ludlow

Masters Theses

No abstract provided.

Current Techniques In The Internal Auditing Of Construction Contracts For Public Utilities, Vernon M. Buttles

Masters Theses

No abstract provided.