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Articles 33811 - 33840 of 34078
Full-Text Articles in Entire DC Network
Characterization And Staged Lagoon Treatment Of Swine Feedlot Waste, Abraham H. Loudermilk Jr.
Characterization And Staged Lagoon Treatment Of Swine Feedlot Waste, Abraham H. Loudermilk Jr.
Masters Theses
"Feedlot pollution is developing into a serious problem because of the trend toward intensive farming techniques and the increasing number of animals in confinement feeding operations. The purpose of this study was to characterize swine waste collected under a slotted feeding floor using a water-carriage system, and to evaluate the treatment of this waste in a staged lagoon system consisting of an anaerobic, a dual anaerobic-aerobic, and an aerobic lagoon. A small feeding floor unit capable of maintaining 3 separate groups of animals, and a pilot 3-lagoon system were designed, constructed, and operated for a period of approximately 4 months. …
Effect Of Biological Activity On Pesticide Desorption, Loh-Tien Chiang
Effect Of Biological Activity On Pesticide Desorption, Loh-Tien Chiang
Masters Theses
"The purpose of this research study was to investigate the effect of biological activities on the desorption of pesticides from humic acid solids. The pesticides selected in this study are dieldrin and heptachlor, both of which have been commonly used in agricultural applications. The humic acid adsorbent was extracted from a coal-like substance called "leonardite", which has a humus content of as high as 53 percent by weight. The first step of this study involved a proper cultivation of biological culture so that the culture could be adapted to a test environment containing a high concentration of humic acids. The …
Preliminary Studies With A Variable Transfer Composite Polymer Membrane., Samuel Walter Dortch
Preliminary Studies With A Variable Transfer Composite Polymer Membrane., Samuel Walter Dortch
Masters Theses
"A preliminary study was done to determine the feasibility of using a compressed fibrous teflon (PTFE) silicone polymer membrane in extracorporeal oxygenation devices. A series of composite membranes were fabricated, using different concentrations of a dimethyl silicone polymer dissolved in petroleum ether, to give membranes having variable oxygen transfer properties. A gas-gas system was chosen to obtain the necessary transfer data. Data were obtained by transferring pure oxygen through the membranes into a mixture of 47 mole percent oxygen and 53 mole percent carbon dioxide. All analyses were obtained by chromatographic techniques. The results of these experiments show that membranes …
A Study And Design Of A Cardiac Interbeat Interval Timer System, Richard William Mooney
A Study And Design Of A Cardiac Interbeat Interval Timer System, Richard William Mooney
Masters Theses
"This thesis reports the design of a system which can measure and record the cardiac interbeat times of human subjects in a continuous beat to beat manner, using the bioelectrical signal associated with the heart as an input. The design is in response to the needs of clinical researchers.
The means of obtaining the bioelectrical signal and previous designs of electrocardiographic equipment, especially electrocardiotachometers, are reviewed. A design is proposed which consists of a preamplifier to amplify the bioelectrical signal, a 60 Hz rejection filter, and a beat detector which uses a differentiation technique to obtain a reliable single output …
Nitrogen Availability To Woody Plant Species As Influenced By Nitrogen Fixation : Interim Report, Robert E. Mcniel, Philip L. Carpenter
Nitrogen Availability To Woody Plant Species As Influenced By Nitrogen Fixation : Interim Report, Robert E. Mcniel, Philip L. Carpenter
JTRP Technical Reports
No abstract provided.
Treatment Of Sanitary Wastes At Interstate Highway Rest Areas, Phase I, James E. Etzel, David W. Hawkins, Kwang Myeung Cho
Treatment Of Sanitary Wastes At Interstate Highway Rest Areas, Phase I, James E. Etzel, David W. Hawkins, Kwang Myeung Cho
JTRP Technical Reports
No abstract provided.
A Proposed Approach To Protect Wastewater Biological Treatment Plants Against Toxic Contaminants, Joseph M. Phillips
A Proposed Approach To Protect Wastewater Biological Treatment Plants Against Toxic Contaminants, Joseph M. Phillips
Retrospective Theses and Dissertations
No abstract provided.
Theoretical Predictions Of Flow Profiles In Capillary Blood Vessels, Eileen Hallman
Theoretical Predictions Of Flow Profiles In Capillary Blood Vessels, Eileen Hallman
Retrospective Theses and Dissertations
The purpose of this thesis is to illustrate the nature of blood flow within capillaries by using familiar mathematical techniques. Because the circulatory system is so complex, the fluid dynamics of the system is prefaced by a discussion of the circulatory physiology in terms of geometry and physics. The understanding of the basic structures and functions of the circulatory components necessarily precedes the justification of assumptions. Several mathematical models which attempt to describe the fluid dynamics of blood flow phenomena are presented and discussed. The results of these models are correlated with existing experimental data in order to determine which …
Localized Wastewater Treatment Facilities, Robert Russell Garrett
Localized Wastewater Treatment Facilities, Robert Russell Garrett
Retrospective Theses and Dissertations
The report describes an alternative to the use of septic tanks for invidual dwellings. The major problems confronting the larger wastewater treatment plants (0.012 to 10 million gallons per day) in central Florida are also discussed. Solutions in this report are for individual and multi-unit dwelling treatment systems (to 0.06 MGD). these units can provide 90% biochemical oxygen demand (BOD) and suspended solids (SS) removal in accord with new state and county regulations. A comparison of the large versus the small plants reveals that small innovative plants, though more expensive, are more environmentally sound than the poorly operated large facilities. …
The Heat Treatment Of Soil By Microwaves To Control Pathogenic Parasitic Fungi, Dean Franklin Rich
The Heat Treatment Of Soil By Microwaves To Control Pathogenic Parasitic Fungi, Dean Franklin Rich
Retrospective Theses and Dissertations
No abstract provided.
The Restoration Of Lake Waters, Charles James Boyter
The Restoration Of Lake Waters, Charles James Boyter
Retrospective Theses and Dissertations
Lake restoration procedures are reviewed with the objective of making recommendations toward future lake restorations for central Florida lakes. The progress of drawdown for restoration is examined. A total phosphorus model is developed for Lake Eola to predict the success of the drawdown. No one restoration procedure should be applied to every lake in central Florida. Each situation must be studied separately. It appears that lake drawdown was the best technique to use for Lake Eola. However, the stormwater inputs and free-flowing drains must be purified to insure the success of the drawdown or the Lake will return within the …
Air Pollution Control Training In Colleges And Universities In The United States, Harold M. Cota
Air Pollution Control Training In Colleges And Universities In The United States, Harold M. Cota
Civil and Environmental Engineering
A nationwide survey of air pollution control training efforts in the United States at colleges and universities was carried out for the S-ll Education and Training Committee, Air Pollution Control Association. Information from 91 schools having four year or graduate programs and five community colleges was received. Questions include type of course work, backgrounds of participating faculty and students, and eventual placement. At the present time about 70% of those in training are graduate students. It was found that most students taking initial employment in air pollution control activities had the M.S. degree. Recommendations for updating this information are made.
13th Annual Rocky Mountain Spectroscopy Conference
13th Annual Rocky Mountain Spectroscopy Conference
Rocky Mountain Conference on Magnetic Resonance
Program and abstracts from the 13th annual meeting of the Rocky Mountain Spectroscopy Conference, hosted by the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, August 9-10, 1971.
Mechanical Testing Of Small, Clear Timber, Paul V. Mcclannahan
Mechanical Testing Of Small, Clear Timber, Paul V. Mcclannahan
Graduate Research Papers
The purposes of the research project were:
1. To investigate the technological methods employed in mechanical testing of small clear timber.
2. To discover the uses, importance, and need for mechanical testing within the wood industry.
3. To experiment with the construction and development of various types of testing equipment similar to that being used by industry.
4. To explore the possibility of adapting mechanical testing of wood samples to the junior or senior high industrial arts wood laboratory
A Study Of Dr. Donald Maley's Theory -- "Research And Experimentation In Industrial Arts", John Edward Ferree
A Study Of Dr. Donald Maley's Theory -- "Research And Experimentation In Industrial Arts", John Edward Ferree
Graduate Research Papers
The problem of this study is to make a thorough examination of Dr. Donald Maley's theory -- "Research and Experimentation in Industrial Arts in the Junior or Senior High School."
Perhaps now in 1968, more than ever, concern for what is in store for industrial arts is, or should be, considered more "grave" than expressed in the above quote of Dr. Maley in 1959. Certainly now it could generally be agreed that all theories concerning the future path of industrial arts, of which Dr. Maley's Research and Experimentation theory is one, deserve a full measure of study and evaluation by …
Centering In Parallel Channel Systems, Allen Katz
Centering In Parallel Channel Systems, Allen Katz
Dissertations
Several types of signal processing systems in which the signal flows along parallel channels in a fashion similar to the auditory system have been investigated. The effect of excitation with signals containing both single and multiple spectral peaks (formants) was considered. In particular, the effect of nonlinear interaction between channels, referred to as centering, in the presence of noise was studied.
These systems were investigated for their value, both as information processing networks and as models of the auditory system.
The analysis indicates that parallel channel systems, in general, exhibit excellent performance in the presence of noise, and that a …
Incineration Of Solid/Liquid Human Waste, Theodore Joseph Wayne
Incineration Of Solid/Liquid Human Waste, Theodore Joseph Wayne
Theses
This thesis encompasses the design criteria required to produce an effective incineration system for the disposal of solid/liquid human waste. Coupled with the overall design parameters is an investigation of the chemical decomposition of the waste during the incineration process, odor treatment and control, and the physiological effects on the human body due to the inhalation of the toxic gases given off during the combustion of human waste.
The variables involved in the combustion process are studied and equations presented that relate the combustion variables of flame temperature, residence time and air requirements. These equations are tested based upon published …
Umr Journal: Alaska -- Its Mineral Potentials And Environmental Challenges, University Of Missouri--Rolla
Umr Journal: Alaska -- Its Mineral Potentials And Environmental Challenges, University Of Missouri--Rolla
UMR Journal -- V. H. McNutt Colloquium Series
No abstract provided.
Arctic Ecology: A Decade Of Experience, John F. Schindler
Arctic Ecology: A Decade Of Experience, John F. Schindler
UMR Journal -- V. H. McNutt Colloquium Series
A quick glance at the title of this presentation and the reader braces himself for another antipollution or “save-the-sod” type of discourse that has become so popular these days. I do not wish to detract from the importance or the need for such efforts but I would like to address myself to the the broader meaning of the term.
Ecology--the word comes from the Greek root “oikos” which means house or household. What I’d like to do is to tell you about this “house” I’ve been living in for the past 10 years.
The Environmental Challenges Facing Taps, A. V. Cardin
The Environmental Challenges Facing Taps, A. V. Cardin
UMR Journal -- V. H. McNutt Colloquium Series
Before the potential benefits of the recent oil discoveries on the North Slope of Alaska can be realized, the oil must be transported to refining and marketing areas. The Alyeska Pipeline Service Company has the responsibility for the first step in this transportation—to design and construct the Trans Alaska Pipeline System. We will pipe the oil from the discovery areas near Prudhoe Bay to an ice-free, deep-sea tanker loading terminal at Valdez of the South Coast of Alaska. From Valdez the oil will be transported to the West Coast by tankers. This is the most feasible system of a number …
An Analysis Of The Behavior Of A Non-Newtonian Fluid In A Flow Reactor, Asahiro Ahagon
An Analysis Of The Behavior Of A Non-Newtonian Fluid In A Flow Reactor, Asahiro Ahagon
Chemical and Biological Engineering ETDs
Velocity, temperature and concentration profiles were derived for non-Newtonian laminar flow of a reacting species in a tubular reactor. The equation of motion based on a temperature dependent power-law fluid model and the energy equation with internal heat generation caused by a first order chemical reaction were coupled and solved simultaneously using numerical methods to yield the profiles. The assumptions made in this study were: constant physical properties of the fluid (density, thermal conductivity and heat capacity). fully developed flow, wall temperature and negligible diffusion. Compartmentalized calculations resulted in velocity, temperature and reactant concentration profiles for both the axial and …
Transition From Laminar To Turbulent Flow For A Two-Phase Mixture, Mohammed Sharief Qureshi
Transition From Laminar To Turbulent Flow For A Two-Phase Mixture, Mohammed Sharief Qureshi
Theses and Dissertations
A phase is simply one of the states of matter. Multiphase flow is the simultaneous flow of several phases. Two-phase flow is the simplest case of multiphase flow.
A Comparison Of Technologist Needs And Training Requirements Of The Major Industries Within The State Of Utah, Gene E. Forsberg
A Comparison Of Technologist Needs And Training Requirements Of The Major Industries Within The State Of Utah, Gene E. Forsberg
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The technologist needs and training requirements were determined from a selected cross-section of Utah industrial firms.
The larger industries were significantly more aware of the training requirements and capabilities of four-year technologists than were the smaller firms.
A significant difference was found regarding general and specialized training required by each firm. Thirteen of the 16 responding firms indicated specialized training as being most important.
The 10 areas of technical training rated most critical in their order of importance were: electronics, technical writing, electricity, English, mathematics (calculus and above), machine shop, manufacturing processes, physics, and metallurgy and design.
There was no …
A Computer Simulation Of A Partial Venous System Of A Human Lower Extremity, David C. Smith
A Computer Simulation Of A Partial Venous System Of A Human Lower Extremity, David C. Smith
Theses and Dissertations
The human body is truly a fascinating and complex creation of our Maker. Because of the complexity and variability, many of its workings were little known until recent years. Some of the more amazing facts of the circulatory system follow. If the individual blood vessels of a single adult, i.e., artery, arteriole capillary, venule and vein, were laid end to end, they would extend more than 60,000 miles. For the average adult, the heart beats 70 times per minute; for the well-conditioned athlete, 50-60 beats per minute; and for the extraordinary athlete, as few as 37 times per minute. The …
Hydraulics Of Waste Stabilization Ponds And Its Influence On Treatment Efficiency, Kenneth A. Mangelson
Hydraulics Of Waste Stabilization Ponds And Its Influence On Treatment Efficiency, Kenneth A. Mangelson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The treatment efficiency of waste stabilization ponds depends on many factors, the most important of which are generally presumed to be the biological factors such as the type of waste and the organic loading. However, the biological activity in a pond is greatly influenced by the environmental conditions of temperature, wind, sunlight, and the hydraulic flow patterns. In the past little attention has been given to the hydraulic characteristics of waste stabilization ponds. Specifically, little consideration has been given to the gross flow patterns within stabilization ponds as affected by the shape of the pond or lagoon, the presence of …
Phosphorus Distribution In The Bottom Sediments Of Hyrum Reservoir, Kirk L. Schmalz
Phosphorus Distribution In The Bottom Sediments Of Hyrum Reservoir, Kirk L. Schmalz
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The distribution of phosphorus in the sediment of Hyrum Reservoir was studied by collecting and analyzing 84 sediment samples for total, inorganic, organic, and water-soluble phosphorus.
Sample locations were mapped by triangulation and sediment phosphorus distribution maps were made. Sediment analysis showed average total phosphorus content of 755 micrograms per gram, with organic phosphorus composing approximately 97 percent of total phosphorus.
Sediment samples showed variability in phosphorus content which precluded identification of point sources of phosphorus input to the reservoir. Several areas of comparatively higher phosphorus content in the sediments were shown with isopleth maps.
An estimate of the extent …
A Theoretical And Experimental Study Of The Mechanism Of Axoplasmic Convection In Nerve Fibers Driven By Peristaltic Surface Waves, Robert John Biondi
A Theoretical And Experimental Study Of The Mechanism Of Axoplasmic Convection In Nerve Fibers Driven By Peristaltic Surface Waves, Robert John Biondi
Dissertations
In the study of cell biology, investigators have found that substances which are produced within the cell nucleus are sometimes found throughout the cell at points distant from the site of production. In the case of nerve cells (neurons), this is particularly dramatic because of the unusual elongated geometry of these cells.
A neuron possesses a cylindrical tubular extension called an "axon" or "axis cylinder" which is characterized by a large length-to-diameter ratio (103-106). The existence of a continuous proximo-distal flow of axoplasm within these cylindrical axons has now been demonstrated by numerous investigators. In …
Faulty Germination Of Lupin Seeds, B J. Quinlivan
Faulty Germination Of Lupin Seeds, B J. Quinlivan
Journal of the Department of Agriculture, Western Australia, Series 4
THE number of lupin seed samples tested in the seed laboratory over the last few years has shown a marked increase with the increasing popularity of lupins as a cash crop.
A seed with satisfactory germination is one which produces a healthy seedling. The germination of lupin samples tested in the laboratory has varied markedly.
A Measurement Of Complex Viscosity With Large Amplitudes, Kuo-Shein Shen
A Measurement Of Complex Viscosity With Large Amplitudes, Kuo-Shein Shen
Doctoral Dissertations
"In order to study the viscoelastic properties of polymer solutions and greases, a dynamic apparatus was built for making measurements of complex viscosity. Characteristic impedance was measured by a force transducer, an accelerometer and a phase meter. Large amplitudes to 0.5 inch can be obtained with this apparatus. The largest amplitude used was 1.27 x10⁻¹ cm. The frequency range was 30 Hz - 1500Hz. The lowest dynamic viscosity to be measured was 0.5 poise. In order to determine the capabilities of the instrument, complex viscosities of polymer solutions and greases were measured. The polymer solutions studied were polyisobutylene (PIB) L-80, …
Report On The School Of Mechanical Engineering National Technical Center Saigon, South Vietnam, Myrne R. Riley
Report On The School Of Mechanical Engineering National Technical Center Saigon, South Vietnam, Myrne R. Riley
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
"Training in the discipline of Mechanical Engineering is offered in South Vietnam by the School of Mechanical Engineering, one of four engineering schools and a Merchant Marine School composing the National Technical Center located presently in the Phu Tho region of Saigon, South Vietnam. The school was established in 1956 for the training of engineers, for mechanical and industrial activities. It became part of the National Technical Center, established by Decree No. 213-Gd by the President of the Republic of Vietnam on June 29, 1957 and graduated the first class of 20 in the summer of 1960. The KS Degree, …