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Articles 33361 - 33390 of 34110
Full-Text Articles in Entire DC Network
The Geology Of Maine's Coastline : A Handbook For Resource Planners, Developers, And Managers, Maine State Planning Office
The Geology Of Maine's Coastline : A Handbook For Resource Planners, Developers, And Managers, Maine State Planning Office
Maine Collection
The Geology of Maine's Coastline : A Handbook for Resource Planners, Developers, and Managers
Executive Department, Maine State Planning Office, Augusta, Maine, June 1983.
Contents: List of Figures / Introduction: The Geological Connection / Chapter 1: Using the Marine Environments Maps / Chapter 2: Perspectives of the Maine Coast / Chapter 3: The Building Blocks of Maine's Coast / Chapter 4: The Disappearing Shoreline / Where to Go for Help / Some Planning Considerations for Development in Coastal Geologic Environments / Land Use Laws of Special Interest to Individual Coastal Property Owners
The Effect Of Ultrasound On The Hydrolysis Of Carbohydrates, Adel A. Khamis
The Effect Of Ultrasound On The Hydrolysis Of Carbohydrates, Adel A. Khamis
Dissertations
Acid hydrolysis of dextran and cellulose were studied with and without irradiation with ultrasonic waves of different frequencies (17 - 150 KHz), and powers (0.4 - 200 w/cm2). In the case of both materials, the hydrolysis reaction was found to be first order with respect to the activity of hydrogen ions in the reaction medium. Weight average molecular weight was evaluated at different durations of the reaction course. The reaction rate of dextran was found to be proportional to the weight average molecular weight raised to the power 4/3, and raised to the power 4 for cellulose.
The …
Mathematical Modeling Of The Unsteady State Glucose And Insulin Concentrations In Blood For Normal Subjects And Diabetics, Tung Shih
Theses
A mathematical model of the blood-glucose regulatory system has been developed. This model describes an oral glucose tolerance test adequately and simulates the behavior of the real physiological system using computer techniques.
Regression of the rate constants involved have been effected by conforming the theoretical functions to the data from glucose tolerance test in nonobese normal subjects, obese normal subjects, nonobese mild diabetics, obese mild diabetics, nonobese moderate diabetics and obese moderate diabetics measured by continuous sampling after oral ingestion. Most of the data were conformed within the limits of experimental error. The result of optimal parameters lead to a …
Computer Simulation Of The Human Hypophysial-Ovarian System, Robert Charles Blencowe
Computer Simulation Of The Human Hypophysial-Ovarian System, Robert Charles Blencowe
Theses
In order to more adequately simulate the human pituitary-ovarian cycle further refinements were made to the original Bogumil and Feng computer models. This involved the inclusion of equations which mathematically describe the peripheral conversion of prehormones and a subroutine showing the effect of plasma proteins, TeBG, CBG, and albumin on the total concentration of estradiol, progesterone, testosterone, androstenedione, dehydroepiandrosterone and estrone.
Once the models were functioning properly, values for the normal state and for the disease condition, Polycystic Ovary Syndrome (PCO), were obtained. In most cases there exists good agreement between the results reported in the literature and those generated …
An Experimental System For Observation Of The Rat Coronary Microcirculation Using Digital Image Processing, Wolfgang Braun
An Experimental System For Observation Of The Rat Coronary Microcirculation Using Digital Image Processing, Wolfgang Braun
Theses
A system was constructed which allows direct observation of the coronary microcirculation of the beating rat heart. An EKG triggered strobe is used on the microscope light source to "stop" the action of the beating heart so the surface microvessels can be observed di rectly under the microscope. Experimental results are recorded on videotape and played back for frame-by-frame analysis of the data using digital Image processing techniques such as digital filtering, image extraction, image enhancement and edge detection.
The application of image enhancement techniques (high order and low order enhancement methods ) as well as edge detection using a …
Computer Simulation Of The Respiratory System, Bruce Diner
Computer Simulation Of The Respiratory System, Bruce Diner
Theses
The respiratory system was simulated utilizing a series of three models, each more complex than the previous. The first model simulated the respiratory system as a two compartment model driven by carbon dioxide concentration. The second model, also a two compartment model, simulated periodic breathing while the third model is a three compartment model and simulates acid-base balance disturbances.
In this study, the effects of hyperthyroidism and respiratory center depression on respiration premeasured utilizing the models to obtain data and then compare the results to known physiologic data.
A Study Of Personal Conflict And Stress Among Engineering Personnel As Influenced By Corporate Policy, Stated And Unstated, Richard Brian Gordon
A Study Of Personal Conflict And Stress Among Engineering Personnel As Influenced By Corporate Policy, Stated And Unstated, Richard Brian Gordon
Theses
The following concepts are being challenged: That organizations are efficient, well-managed, and intelligent: that if one is to believe in any sort of authority, one must first accept the notion that it truly knows best and that it is not only competent, but well-intentioned; that organizations exist for the benefit of their employees and customers; that organizations reward dedication, competence, and performance: that if the organization is to grow it needs loyal sacrificing people; that organizations are dynamic and receptive to change; that if the employee is discouraged, do not worry, for tomorrow will be better; that to be useful …
Managing In The Technical Sales Arena, Robert Munro
Managing In The Technical Sales Arena, Robert Munro
Theses
The major objective of this thesis is to portray the role of a Field Engineer for a major manufacturer of electrical distribution and control equipment. In so doing, it should represent a reasonable facsimile of what a sales manager of a large Field Office, comprised of approximately twelve Field Engineers, would encounter in his supervisory capacity. As such, it should provide information for those interested in entering and hoping to manage in technical sales career.
While much of the information was derived from books, periodicals, and conversations with people associated with the electrical industry, the major portion of the work …
Automated Instrumentation System For Studies Of Metabolic Rates In Rats, Suhas P. Pathak
Automated Instrumentation System For Studies Of Metabolic Rates In Rats, Suhas P. Pathak
Theses
The task of the instrumentation system is to measure the respiratory exchange in rats in a controlled experiment. Air is drawn at a predeter-mined rate in and out of rat chambers. The proportion of oxygen and carbon dioxide in the ensuing air indicates the respiratory rate of the rat. The entire operation is controlled by a microcomputer whose most important functions are: to direct the flow of air through the rat chambers by switching valves; and to collect data about the percentages of gases in question.
Thus with the help of a computer it is possible to monitor and control …
The Hydroxide-, Chymotrypsin-, And Blood-Catalyzed Hydrolysis Of A Series Of Sodium 4-Acyloxy-3-Nitrobenzene Sulfonates, Louis E. Rinaldi
The Hydroxide-, Chymotrypsin-, And Blood-Catalyzed Hydrolysis Of A Series Of Sodium 4-Acyloxy-3-Nitrobenzene Sulfonates, Louis E. Rinaldi
Theses
The kinetics of the hydrolysis of a series of water-soluble aromatic esters (sodium 4-acyloxy-3-nitrobenzene sulfonates) were analyzed in order to determine the effect of a variety of substitutions (on the α-carbon of the acid group) upon the rate of reaction.
The following was observed. That (a), the hydroxide catalyzed and water dependent hydrolyses of these esters are slower for larger substituents and faster for smaller ones. That (b), the chymotrypsin catalytic hydrolysis of these esters shows an acylation reaction step which occurs at a rate greater than deacylation for larger substituents, and at approximately equal rates for smaller ones. Furthermore, …
Nonpoint Source Pollution To Bear Lake, Utah-Idaho: Magnitude, Periodicity, And Watershed Management Alternatives, Victor J. Kollock
Nonpoint Source Pollution To Bear Lake, Utah-Idaho: Magnitude, Periodicity, And Watershed Management Alternatives, Victor J. Kollock
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
From April of 1981 to June of 1982 a Clean Lakes Program Phase 1 Diagnostic Feasibility Study was conducted on Bear Lake, a 282 km2 (109m2) fresh-water lake located in southeastern Idaho and northeastern Utah. A portion of this Clean Lakes Program required an itemized inventory of all nonpoint sources affecting the lake's water quality.
A 16 month lake tributary monitoring program, which included the spring runoff periods of 1981 and 1982, provided data from which nutrient loading values (kg/day and kg/yr) were calculated. Analysis of these data, along with land use percentages within the Bear Lake …
Plan Of Study For Cross Florida Barge Canal: Economic Analysis, United States. Army. Corps Of Engineers. Jacksonville District
Plan Of Study For Cross Florida Barge Canal: Economic Analysis, United States. Army. Corps Of Engineers. Jacksonville District
Correspondence and Textual Material
At the time of the previous study of transportation savings, commerce in coal primarily for electric power generation could not be ·projected with any degree of accuracy because most electric utilities had not developed firm plans for building new coal-fired plants· or for converting from petroleum products or natural gas to coal at existing plants. Today, with plants already constructed that will burn coal, there is a greater probability of defining coal needs. So there is a need to reevaluate potential coal traffic via the CFBC. Also there is a need to evaluate the other types of benefits mentioned under …
Thermal Gasification Of Densified Sewage Sludge And Solid Waste, Samuel A. Vigil, George Tchobanoglous
Thermal Gasification Of Densified Sewage Sludge And Solid Waste, Samuel A. Vigil, George Tchobanoglous
Civil and Environmental Engineering
Disposing of sewage sludge in an economical and environmentally acceptable manner is a problem for all communities that have wastewater treatment plants , Similarly , many communities are having to dispose of increasing quantities of solid waste. These problems could be solved by co-disposal of sludge and solid waste in a common facility. This study, a condensation of the original report, presents results of an experimental program on the feasibility of gasifying densified sludge and source-separated solid waste.
An Improved Rotary Singulator, Burford J. Furman, J. M. Henderson
An Improved Rotary Singulator, Burford J. Furman, J. M. Henderson
Faculty Publications, Mechanical Engineering
A new operating approach for a previously existing rotary singulator was developed which improves the versatility of the device. This was accomplished by the implementation of a modular mechanism that performed the basic functions of agitation, gating, pocket formation, and exit, all inherent in this type of singulation device.
An Economic Evaluation Of Benefits And Costs Of Maintaining Instream Flows, Rangesan Narayanan, Dean T. Larson, A. Bruce Bishop, Parvaneh Amirfathi
An Economic Evaluation Of Benefits And Costs Of Maintaining Instream Flows, Rangesan Narayanan, Dean T. Larson, A. Bruce Bishop, Parvaneh Amirfathi
Reports
Instream flows enhance recreation, hydropower, fish and wildlife maintenance, and riverine ecosytems. Each use has water requirements that vary over time in unique patterns. The determination of the overall instream requirement at any given time must be considered in competition with the demand for municipal and agricultural uses. Two obstacles to integrating instream uses into the appropriation system of water law are difficulty in satisfying the legal requirements of an appropriation for a public use and the fact that instream flow uses are considered more "environmental" than "economic" in character. The extreme options for allocating flow between these user groups …
The Effects Of Limited Food Availability On The Striped Bass Fishery In Lake Mead, John R. Baker, Larry J. Paulson
The Effects Of Limited Food Availability On The Striped Bass Fishery In Lake Mead, John R. Baker, Larry J. Paulson
Publications (WR)
The original range of striped bass (Morone saxatilis) was along the Atlantic Coast. They were introduced into the lower Sacramento River in 1879 and are now also found along the Pacific Coast. A landlocked striped bass fishery was established in Santee-Cooper Reservoir, South Carolina, in 1954, and they have since been introduced into numerous other reservoirs, including Lake Havasu, Lake Mead and Lake Powell on the Colorado River. Striped bass were introduced into Lake Mead in 1969 in response to declines in the largemouth bass (Micropterus salmoides) fishery that occurred during the 1960s and in order to further utilize the …
Civil Engineering, Arthur Johnson, Guilford O. Fossum
Civil Engineering, Arthur Johnson, Guilford O. Fossum
UND Departmental Histories
This departmental history was written on the occasion of the UND Centennial in 1983.
Granular Activated Carbon Pilot Plant For The Removal Of Color, Toc, And Thmfp, Jeffrey L. Herr
Granular Activated Carbon Pilot Plant For The Removal Of Color, Toc, And Thmfp, Jeffrey L. Herr
Retrospective Theses and Dissertations
As part of an Environmental Protection Agency grant to reduce the trihalomethane concentration in the Melbourne, Florida drinking water, a granular activated carbon (GAC) plant was operated for approximately 1 year. Four GAC pilot plant systems were operated in parallel each treating a different influent. Raw water, coagulated, settled and filtered water, filtered water with ozone pretreatment, and filtered water with chlorine dioxide pretreatment were pumped through the individual systems. Influent and effluent concentrations of various pollutants were monitored regularly throughout the study. The raw water GAC system showed rapid breakthrough for color, total organic carbon (TOC) and trihalomethanes (THM's). …
An Experimental Investigation Of The Effects Of Crude Oil On Two Freshwater Lake Ecosystems, Martin D. Werner, V. Dean Adams, Vincent A. Lamarra
An Experimental Investigation Of The Effects Of Crude Oil On Two Freshwater Lake Ecosystems, Martin D. Werner, V. Dean Adams, Vincent A. Lamarra
Reports
Responses of two freshwater lake ecosystems of the Intermountain West to crude oil impaction were investigated. The research was conducted in two phases; in the first phase effects of crude oil were studied on an ecosystem established in three phase laboratory microcosms (gaseous-aqueous-sediment), which simulated the natural lakes. Notable responses of the microcosm ecosystem to oil impaction included: an increased oxygen demand by the biological community, nutrient immobilization, a reduction in plant biomass accumulation and a heterotrophically dominated ecosystem. The increased availability of biologically degradable reduced carbon (i.e., the oil) and nutrient immobilization, rather than toxic effects of oil on …
Effects Of Cadmium On Streams And Irrigated Agriculture In The Presence And Absence Of Oil Shale Leachate, Douglas A. Selby, Jean M. Ihnat, Fredrick J. Post, Jay J. Messer
Effects Of Cadmium On Streams And Irrigated Agriculture In The Presence And Absence Of Oil Shale Leachate, Douglas A. Selby, Jean M. Ihnat, Fredrick J. Post, Jay J. Messer
Reports
Artificial streams, soil perfusion columns, and potted plants were exposed to 20 ug Cd/l in the presence and absence of unretorted oil shale leachate. High cadmium accumulations occurred in the stream biota, but did not measurably affect community structure or function. The presence of oil shale leachate had no effect on bioaccumulation or ecosystem structure or function. Nitrification in soil columns was enhanced by the presence of the organic fraction of oil shale leachate, but this effect was not observed when cadmium was present. Crop accumulation of cadmium was somewhat higher in alfalfa and radishes irrigated with leachate, but did …
Alteration Of Availability Of Heavy Metals To Aquatic Microflora By Complexation With Organics Associated With Oil Shale Development, Bruce S. Mok, Jay J. Messer
Alteration Of Availability Of Heavy Metals To Aquatic Microflora By Complexation With Organics Associated With Oil Shale Development, Bruce S. Mok, Jay J. Messer
Reports
Leachates from both raw (unretorted) and Paraho retorted oil shale show the ability to bind copper, and perhaps cadmium, strongly enough to mitigate the inhibitory effects of these metals on the growth of the test algal,
Polycyclic Aromatic Hydrocarbons: Are They A Problem In Processed Oil Shales?, David L. Maase, V. Dean Adams
Polycyclic Aromatic Hydrocarbons: Are They A Problem In Processed Oil Shales?, David L. Maase, V. Dean Adams
Reports
Organic residues from processed oil shales were characterisized with specific attention to polycyclic aromatic hydrocarbons (PAH). Oil shale development in the White River Basin (Utah and Colorado) was projected and hydrological and geological parameters pertinent to estimations of polycyclic aromatic hydrocarbons (PAH) flux were focused. Oil shale samples from the Union B, Paraho, and Tosco II processes were extracted by using organic solvents in a soxhlet apparatus and by mixing shale samples with water (characterization in
Evaluation Of The Potential For Groundwater Transport Of Mutagenic Compounds Released By Spent Oil Shale, Robert E. Hinchee, V. Dean Adams, Jeffrey G. Curtis, Alberta J. Seierstad
Evaluation Of The Potential For Groundwater Transport Of Mutagenic Compounds Released By Spent Oil Shale, Robert E. Hinchee, V. Dean Adams, Jeffrey G. Curtis, Alberta J. Seierstad
Reports
The major focus of this study was on the potential mutagenicity of aqueous leachates from spent oil shale. Additional mutagenicity testing was also done on raw shale and coal. The Ames salmonella microsomal bioassay was used to test for chemical mutagenicity. Spent oil sahles from the Paraho and TOSCO II processes, a raw shale from Anvil Points, and a composite coal sample from the Wasatch plateau were extracted with water and organic solvents. Only organic solvent extraction of the TOSCO spent shale resulted in a mutagenic response. The lack of mutgenic reponse to organic extracts of Paraho spent shale was …
Eutrophication Assessment Of Mt. Dell Reservoir, Richard A. Hanson, V. Dean Adams, Vincent A. Lamarra, Kyle R. Cook, Dennis B. George
Eutrophication Assessment Of Mt. Dell Reservoir, Richard A. Hanson, V. Dean Adams, Vincent A. Lamarra, Kyle R. Cook, Dennis B. George
Reports
The degree and possible causes of eutrophication in Mt. Dell Reservoir, a small water supply reservoir in Parleys Canyon above Salt Lake City, were examined with a number of limnological studes. These studies described external (incoming stream flow) and internal (sediment) nutrient sources, general limnology, nutrient limitations, and trophic state. A monthly program of sampling at selected stream sites determined taht one area of mixed agricultural and undistrubed rangeland contributed significant amounts of total soluble inorganic nitrogen. Sediment phosphorus uptake and release rates were determined with aquatic three-phase microcosms. The results indicated that sediment phosphorus mass loadings were small (less …
Adapting Appropriation Water Law To Accommodate Equitable Consideration Of Instream Flow Uses, Jay M. Bagley, Dean T. Larson, Lee Kapaloski
Adapting Appropriation Water Law To Accommodate Equitable Consideration Of Instream Flow Uses, Jay M. Bagley, Dean T. Larson, Lee Kapaloski
Reports
The increasing public interest in naturally flowing streams has fostered efforts to obtain their protection under existing state water laws. In this study, the water laws of Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming were examined and compared 1) with each other, and 2) against a set of aleitn criteria, to assess shortcomings in accommodating instream flow protections. It was determined that the appropriation system has the essential features of and ambodies legal principles that should allow the accommodation of instream flow values but, at this time, purchase of existing rights or the exercise of governmental reservation/withdrawal/appropriation …
Aquatic Resources Management Of The Colorado River Ecosystem, V. Dean Adams, Vincent A. Lamarra
Aquatic Resources Management Of The Colorado River Ecosystem, V. Dean Adams, Vincent A. Lamarra
Reports
The Colorado River system has often been referred to as "the most regulated river system in the world." The Colorado River Basin serves millions of people through agricultural, energy, municipal and industrial uses, fish and wildlife activities, and recreation. The symposium was conceived and organized to allow researchers, private industry, consultants, water users, regulatory agencies, and concerned citizens the opportunity to express needs, desires, and concerns about the vast resources of the Colorado River. We found that there were a diverse number of problems confronting the individuals who are involved in the management of this important ecosystem. A variety of …
Reconnaissance Of Sediment-Phosphorus Relationships In Upper Flaming Gorge Reservoir, Jay J. Messer, Jean M. Ihnat, Bruce Mok, David Wegner
Reconnaissance Of Sediment-Phosphorus Relationships In Upper Flaming Gorge Reservoir, Jay J. Messer, Jean M. Ihnat, Bruce Mok, David Wegner
Reports
Executive Summary: A reconnaissance-level study was conducted in Flaming Gorge Reservoir, Wyoming, during the late summer of 1982 in order to determine the possible importance of the sediment sin exacerbating the blue-green algal blooms that occur in summer in the upper reservoir. Sediments can affect phytoplankton dynamics in reservoirs on an annual basis by delyaing the availability of particulate P associated with spring runoff until late summery, when the warm water temperatures and the light climate favor the growth of blue-green algae. Over the longer term, however, sediments that historically have served as a trap for part of the annual …
Educational Specialist Degree In Computer-Based Learning, Nova Southeastern University
Educational Specialist Degree In Computer-Based Learning, Nova Southeastern University
College of Engineering and Computing Course Catalogs
No abstract provided.
Center For Science And Engineering Schedule Of Classes Spring-Summer 1983, Nova Southeastern University
Center For Science And Engineering Schedule Of Classes Spring-Summer 1983, Nova Southeastern University
College of Engineering and Computing Course Catalogs
No abstract provided.
The Technical And Economic Feasibility Of Producing Methane From Biomass Using A Leaching-Bed/Packed-Bed Conversion Process, Steven W. Hinton
The Technical And Economic Feasibility Of Producing Methane From Biomass Using A Leaching-Bed/Packed-Bed Conversion Process, Steven W. Hinton
Retrospective Theses and Dissertations
The economic feasibility and energy effectiveness of producing pipeline quality methane gas from biomass was assessed for a new and totally unproven process. The biomass feedstock considered was the common aquatic weed water hyacinth and a novel active boom-winch harvesting system is proposed for its collection. The conversion process analyzed is a two stage biological process which utilizes a leaching-bed for the production of volatile acids and a packed-bed for the production of methane gas. In order to determine the feasibility of the proposed process equipment requirements, capital costs and operating/maintenance costs were developed for three system sizes. This data …