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Articles 290701 - 290730 of 302597
Full-Text Articles in Physical Sciences and Mathematics
An Application Of "Storm" Mathematical Modeling For Evaluation Of Nonpoint Source Water Pollution For A Nonurban Watershed, John T. Izzo
An Application Of "Storm" Mathematical Modeling For Evaluation Of Nonpoint Source Water Pollution For A Nonurban Watershed, John T. Izzo
Retrospective Theses and Dissertations
Today, the engineer is faced with the task of predicting and evaluating the extent of the Nonpoint Sources that pollute our waterways. A mathematical model may be an extremely useful tool in helping the engineer solve problems in the area of water resources. During the course of this investigation, a literature survey related to the Econlockhatchee River Basin and to the "STORM" mathematical modeling technique for runoff evaluation has been conducted. The latter part of this report deals with an application of the "STORM" mathematical model for predicting quantity and quality of surface runoff for the Econlockhatchee River Basin located …
Plating Wastewater Management, Earl Kenneth Ossorio
Plating Wastewater Management, Earl Kenneth Ossorio
Retrospective Theses and Dissertations
A study was made of existing methods of management, treatment and disposal of water and wastewater effluents at a large aerospace facility (Martin Marietta Aerospace) in Central Florida. Water consumption and handling were evaluated, with emphasis being placed on the handling of plating wastes, since they are the main contributor of industrial wastewater pollutants at the facility. The flow, storage, and treatment of the plating wastes were studied. Literature concerning plating wastes was surveyed to determine the latest "state of the art" on handling of plating pollutants. Then, the "state of the art" processes were compared with the existing processes …
Mixing Effects On Shallow Water Bodies, Kim Robin Powell
Mixing Effects On Shallow Water Bodies, Kim Robin Powell
Retrospective Theses and Dissertations
This report is intended to examine the ecological changes due to mixing in shallow water bodies. Physical, chemical, and biological changes are reported in literature. A literature search revealed the range of mixing nodes or processes. Assessment of ecological changes due to mixing by boating activities had been evaluated in a research project supported by the environmental Protection Agency and conducted at Florida Technological University. The examination of changes due to mechanical mixing on lake ecology simulated in fifty-five gallon drums indicated the sensitivity of such parameters as total Kjeldahl nitrogen, conductivity, pH, temperature, and dissolved oxygen. Problems of reproducibility …
Stratigraphic Occurrences Of Teleoceras With A New Kimballianspecies From Nebraska, Lloyd G. Tanner
Stratigraphic Occurrences Of Teleoceras With A New Kimballianspecies From Nebraska, Lloyd G. Tanner
Bulletin of the University of Nebraska State Museum
Study of Teleoceras remains in the University of Nebraska State Museum indicates that this specialized, short-limbed rhinoceros inhabited the Central Great Plains from Early through Late Pliocene. Previously thought to have become extinct at the end of the middle Pliocene, this genus is now known from the very latest Pliocene. A new species, Teleoceras schultzi, is described from the Kimball Formation, Ogallala Group, Frontier County, Nebraska.
Erratum: Multimedia Dispersion Relation For Surface Electromagnetic Waves. (The Journal Of Chemical Physics (1975) 62 (1674)), C. A. Ward, K. Bhasin, Robert John Bell, Ralph William Alexander, I. Tyler
Erratum: Multimedia Dispersion Relation For Surface Electromagnetic Waves. (The Journal Of Chemical Physics (1975) 62 (1674)), C. A. Ward, K. Bhasin, Robert John Bell, Ralph William Alexander, I. Tyler
Physics Faculty Research & Creative Works
No abstract provided.
Biquadratic Exchange And First-Order Ferromagnetic Phase Transitions, Harry A. Brown
Biquadratic Exchange And First-Order Ferromagnetic Phase Transitions, Harry A. Brown
Physics Faculty Research & Creative Works
We have calculated some properties of a ferromagnet using a Heisenberg Hamiltonian with a biquadratic exchange term added. The constant-coupling approximation was employed. If the strength of the biquadratic exchange relative to the bilinear is given by a dimensionless parameter α, there is a critical value αc at which the phase transition changes character from second order for αα>αc. The spontaneous magnetization, the exchange energy, and the spin-correlation function show discontinuous jumps at α=αc and unstable behavior for α>αc. © 1975 The American Physical Society.
Mechanistic Studies Of Alkylation Of Cobalt(I) By Cyclobutyl Derivatives, Hao Ku
Mechanistic Studies Of Alkylation Of Cobalt(I) By Cyclobutyl Derivatives, Hao Ku
Masters Theses
A study was initiated on the hypothesis, by Ugi and co-workers, that cyclopropyl, cyclobutyl, and cyclopentyl electrophiles might under go nucleophilic substitution reactions with retention of configuration.
The synthesis of benzocyclobutenol and 2-phenylcyclobutyl tosylate is described. The reactions of these tosylates with cobalt(I) "supernucleophiles" gave low yields of products which have not been purified sufficiently for assignment of stereochemistry.
Reaction of cyclopentyl tosylate and phenylethyl tosylate with the "supernucleophiles" cobaloxime(I) and cobalt(salen)(I) is discussed for the advance of future work.
Use Of The Psi Technique In Prerequisite Courses, John T. Park, William R. Snow
Use Of The Psi Technique In Prerequisite Courses, John T. Park, William R. Snow
Physics Faculty Research & Creative Works
An engineering physics course, in which the Personalized System of Instruction (PSI) technique has been used, has been designed to meet the requirements that all of a prescribed list of subjects be covered and that the course be completed within a single semester. The course was modified so that it has two levels of mastery for each unit: a passing level and a complete mastery level. All students were required to reach a passing level of mastery on all of the required material. Grades were assigned according to the number of complete mastery level examinations passed. It was found that …
Studies On The Niche Separation In Two Carabid Cave Beetles, Tom Mckinney
Studies On The Niche Separation In Two Carabid Cave Beetles, Tom Mckinney
International Journal of Speleology
Population, habitat and behavioural studies carried out on Pseudanophthalmus menetriesi and P. pubescens in the south central Kentucky karst area are described and discussed. Differences which exist in the timing of population recruitment, habitat preference, habitat niche breadth and in the degree of agression are all important in lessening competition between these two species.
Heavy Metal Contamination In Soil Around A Lead Smelter In Southeast Missouri, David Lewis Butherus
Heavy Metal Contamination In Soil Around A Lead Smelter In Southeast Missouri, David Lewis Butherus
Masters Theses
"In order to determine the extent of possible heavy metal contamination, more than 963 samples of leaf litter and soil were collected from 410 sample stations around the AMAX smelter in southeast Missouri. Dried samples of leaf litter and minus 80 mesh soil fractions were analyzed for cadmium, copper, lead, and zinc by atomic absorption spectrophotometry. Minus 80 mesh soil fractions were also analyzed for sulfur using x-ray fluorescence methods. Ranges of heavy metal concentrations in leaf litter were: cadmium, 0.13 μg/g to 175 μg/g; copper, 4.2 μg/g to 6500 μg/g; lead, 50 μg/g to 130,000 μg/g; and zinc, 26 …
Geology Of The North Beulah, Center, And Glenharold Lignite Mines In Mercer And Oliver Counties, Southwestern North Dakota, Roy E. Kulland
Geology Of The North Beulah, Center, And Glenharold Lignite Mines In Mercer And Oliver Counties, Southwestern North Dakota, Roy E. Kulland
Theses and Dissertations
The geology of the North Beulah, Center, and Glenharold lignite mines in Mercer and Oliver Counties, southwestern North Dakota, were examined. Stratigraphically, all mines lie within the Sentinel Butte Formatiom. The North Beulah Mine lies 70 m below the top of the Sentinel Butte Formation and the Center and Glenharold Mines lie about 80 m above the base of the Tongue River Formation.
Four sedimentary types are recognized arid common to all mines; these are: silt and clay, silty sand, sand, and lignite. The silt and clay were deposited in floodbasins and shallow lakes occupying the lowest parts of the …
Petrography Of Precambrian Iron Formation, Pembina County, North Dakota, Ronald E. Richardson
Petrography Of Precambrian Iron Formation, Pembina County, North Dakota, Ronald E. Richardson
Theses and Dissertations
In October of 1964 the Topographic Branch of the United States Geological Survey reported difficulties in using magnetic compasses while mapping in the areas of Akra and Hensel, Pembina County, North Dakota. University of North Dakota geologists located anomalies of 67,500 gammas 1.6 lon east of Akra and 71,500 gammas 4 km east of Hensel, the normal magnetic field in this area being about 60,000 gammas. The rock bodies producing the magnetic anomalies were drilled and examination of diamond drill core showed them to consist of oxide and silicate facies iron formation interlayered with quartz-biotite schist of Precambrian age. The …
Quaternary Geology Of The Southern Part Of The Grand Forks And Bemidji Quadrangles, Donald K. Sackreiter
Quaternary Geology Of The Southern Part Of The Grand Forks And Bemidji Quadrangles, Donald K. Sackreiter
Theses and Dissertations
Northwestern Minnesota is an area at the southwestern edge of the Canadian Shield that is mantled by thick Pleistocene sediment. The Pleistocene material included a variety of glacial, shoreline, offshore, fluvial, and eolian sediment.
The lithology of the glacial sediment reflects the rock and sediment over which the depositing glacier flowed. Glaciers that advanced from the northeast (Canadian Shield) deposited sandy, granitic-rich material. Glaciers that advanced from the north· (Manitoba Lowland) deposited loamy, calcareous-rich material. Glaciers that advanced from the northwest (eastern North Dakota and southwestern Manitobal deposited clayey, shale-ridt material. A variety of fluvial and lacustrine sediments are typically …
Nitrogenous Fertilisers For Cereal Production, M G. Mason
Nitrogenous Fertilisers For Cereal Production, M G. Mason
Journal of the Department of Agriculture, Western Australia, Series 4
Among the many factors influencing crop response to nitrogen applications, the most important are the season, soil type, paddock history, time of application and source of nitrogen. Before deciding whether to use nitrogen on a cereal crop, which source to use and at what rate, the farmer needs some understanding of how these factors work.
Extracts From The Department Of Agriculture's Annual Report, 1974-75, Department Of Agriculture, Western Australia
Extracts From The Department Of Agriculture's Annual Report, 1974-75, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
The Department of Agriculture's Annual Report for the year ended June 30, 1975, took the form of short reviews of selected activities of the Department during the year.
Some of these reviews are reprinted below to give an idea of the range of activities undertaken by the Department. A limited number of copies of the full report are available to interested organisations from the Department of Agriculture, Jarrah Road, South Perth, 6151.
In past years the Department's report has taken the form of a relatively detailed technical summary of the work of each Division. Because of the large volume of …
Time And Rate, Comparative Fungicide, Fungicide Application Method Trial, Clover Scorch Economy Demonstrations, A Bokor
Experimental Summaries - Plant Research
Time and Rate Trial 75AL33 Comparative Fungicide Trial 75AL34. Fungicide Application Method Trial 75D8. Clover Scorch Economy Demonstrations 75AL35.
1975 Soil Fertility - Grain Lupins - Long Term Rotation Trials, Ian Rowland
1975 Soil Fertility - Grain Lupins - Long Term Rotation Trials, Ian Rowland
Experimental Summaries - Plant Research
Soil Fertility - Grain Lupins 75A4, 75BA6, 75E4, 75GE9, 75JE9, 75MT6, 75N028, 75WH9. Long Term. Rotation Trials W56H, 66M29, 67Cl3, 67N4, 68E5, 68SG5, 69GE20, 73SG16. Soil Fertility - Grain Lupins Use of the stage 4 lupin variety trials to assess the effect of a year of sweet grain lupins on a following cereal crop was continued. The 1974 variety trials contained a number of lupin varieties randomised with two standard wheat varieties. Also at two times of planting. Eight trials were selected: 74GE26 at Morawa, 74BA7 at Badgingarra, 74WH8 at Wongan Hills, 74N08 at Bolgart, 74A8 at Beverley, 74MT8 at …
Thermal Instability In Supernova Shells, R. Mccray, R. F. Stein, Menas Kafatos
Thermal Instability In Supernova Shells, R. Mccray, R. F. Stein, Menas Kafatos
Mathematics, Physics, and Computer Science Faculty Articles and Research
Thermal instability in the radiative cooling region behind a shock will cause upstream density fluctuations to collapse into thin sheets aligned parallel to the shock front. A linearized calculation demonstrates the development of this instability. Thermal conduction suppresses the development of small-scale perturbations. Estimates of the scale sizes for the fully developed condensations agree roughly with the scale sizes of fine structure observed in supernova shells such as the Cygnus Loop.
A Model Of Data Structures Commonly Used In Programming Languages And Data Base Management Systems, William L. Honig
A Model Of Data Structures Commonly Used In Programming Languages And Data Base Management Systems, William L. Honig
Computer Science: Faculty Publications and Other Works
This thesis claims that contemporary data structures can be understood and studied with an intelligible model which captures their essential differences and similarities and, further, that such a model is an appropriate basis for a top-down description method for data structures. To define the scope of the model, the data structures included in 21 programming languages and data base management systems have been tabulated. Each individual data structure is illustrated with an example drawn from a published paper or a working computer program. This mélange of data structures is divided into three classes (aggregates, associations , and files) and each …
Attempted Synthesis Of 1-Methyl-4-Isopropyl-Hydroxy Bicyclo (3.1.0) Hexane, Kenny Uzoma Acholonu
Attempted Synthesis Of 1-Methyl-4-Isopropyl-Hydroxy Bicyclo (3.1.0) Hexane, Kenny Uzoma Acholonu
University of the Pacific Theses and Dissertations
The purpose of this work was to investigate a general synthetic route to 1-Methyl-4-Isopropyl-Hydroxy Bicyclo (3.1.0) Hexane.
On The Existence Of Solutions Of Differential Equations And Zeros Of Operators In K-Banach Spaces, Evin Bronson, R. L. Tennison, A. Richard Mitchell
On The Existence Of Solutions Of Differential Equations And Zeros Of Operators In K-Banach Spaces, Evin Bronson, R. L. Tennison, A. Richard Mitchell
Mathematics Technical Papers
The theory of existence of solutions of differential equations in a Banach space employing norm as a measure is sufficiently well known [5, 6, 8, 9]. Also utilizing this theory one can prove the existence of zeros of operators [2, 7, 8, 9, 11]. The advantage of using a generalized norm as a candidate in discussing the qualitative theory of differential equations is also known [1]. These thoughts naturally lead to the use of cone-valued norms as a measure since this approach unifies the existing theories as well as offers a more flexible mechanism for applications. In this paper, we …
Fixed Point Theorms Of Operators With Ppf Dependence In Banach Spaces, Stephen R. Bernfeld
Fixed Point Theorms Of Operators With Ppf Dependence In Banach Spaces, Stephen R. Bernfeld
Mathematics Technical Papers
In this paper we develop a theory of fixed points of a nonlinear operator, T, whose domain is the Banach space of continuous functions defined on an interval [a,b] with range in a Banach space E denoted by [see pdf for notation] and the range of the nonlinear operator T is in E. As we shall see delay differential equations form an important example of such a nonlinear operator. We shall obtain analogues of the contraction mapping principle, Krasnoselskii's fixed point theorem as well as a result on the convergence of iterations of quasi-nonexpansive mappings.
Sources Of Excitation Of The Interstellar Gas And Galactic Structure, J. J. Cowan, Menas Kafatos, W. K. Rose
Sources Of Excitation Of The Interstellar Gas And Galactic Structure, J. J. Cowan, Menas Kafatos, W. K. Rose
Mathematics, Physics, and Computer Science Faculty Articles and Research
The excitation of the interstellar gas. is discussed in the light of recent evidence from γ-ray, molecular, and 21-cm line observations. Previous studies of the excitation of the interstellar gas have not taken into account the substantial density contrast that exists between spiral arms and interarm regions. We examine the role played by the galactic distribution of three sources of excitation (supernovae, OB stars, and ultraviolet stars) in determining the physical state of the interstellar gas in arm and interarm regions.
An Important Brachiopoda Species From The Visean Of Turkey: Whidbornella Caperata (Sow.), Ayça Salanci
An Important Brachiopoda Species From The Visean Of Turkey: Whidbornella Caperata (Sow.), Ayça Salanci
Bulletin of the Mineral Research and Exploration
No abstract provided.
Etude Des Espèces Du Genre Campanile Bayle (İn Fischer), 1884, De L'Eocène De La Région D'Ankara-Haymana, Ayhan Güngör
Etude Des Espèces Du Genre Campanile Bayle (İn Fischer), 1884, De L'Eocène De La Région D'Ankara-Haymana, Ayhan Güngör
Bulletin of the Mineral Research and Exploration
No abstract provided.
A Study Of Bakerite, Orhan Baysal, Erhan Di̇leköz
A Study Of Bakerite, Orhan Baysal, Erhan Di̇leköz
Bulletin of the Mineral Research and Exploration
No abstract provided.
The North Anatolian Fault Zone : New Interpretation As A Paleo-Benioff Zone, Gürol Ataman, Ersen Buket, Ussal Z. Çapan
The North Anatolian Fault Zone : New Interpretation As A Paleo-Benioff Zone, Gürol Ataman, Ersen Buket, Ussal Z. Çapan
Bulletin of the Mineral Research and Exploration
No abstract provided.
Some Relationships In The Water Quality And Life Forms Of Field Tile Effluents And Downstream Water, Joseph C. Sidwell
Some Relationships In The Water Quality And Life Forms Of Field Tile Effluents And Downstream Water, Joseph C. Sidwell
Masters Theses
No abstract provided.
The Intramolecular Torsional Potential And Dielectric Properties Of 2,3-Butanedione, Gevert H. Meyer
The Intramolecular Torsional Potential And Dielectric Properties Of 2,3-Butanedione, Gevert H. Meyer
Masters Theses
Dipole moment measurements have been carried out on 2,3-butanedione in solution, pure liquid, and the vapor phase. A dipole moment of 1.03 ± .01 Debye was observed for dilute solutions of 2,3-butanedione in carbon tetrachloride. Pure liquid samples exhibit an anomalous dipole of 1.56 ± .01 Debye. The following results were obtained for vapor phase measurements: 1.04, 1.07, 1.08, 1.11, and 1.17 ± .01 Debye at 310.15, 350.15, 370.15, 431.70 and 472.10 ± .02°K respectively.
The acetyl torsional potential was characterized from the observed temperature dependence of dipole moment. This torsional mode was described by a two-parameter potential function: V(Ø) …
Zwitterionic Carbonyl Halide Complexes Of Tungsten, Dragoslav Marcovich
Zwitterionic Carbonyl Halide Complexes Of Tungsten, Dragoslav Marcovich
Masters Theses
The first carbonyl halide zwitterionic complexes have been synthesized and are of the type cis- (OC)4XWPPh2(CH2)nPPh2R in which X is Cl, Br, or I, n is 1 or 2, and R is an alkyl group. The complexes were prepared by the reaction […]. The temperature of the reaction must be carefully controlled since the decomposition point of the product is only 10°C higher than that of the reactant.
The zwitterionic complexes are sensitive to light in solution but are insensitive to light in the solid state. Unlike carbonyl halide complexes of the …