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Articles 292741 - 292770 of 302505
Full-Text Articles in Physical Sciences and Mathematics
Predicting Nitrogen Transformations And Osmotic Potentials In Warm Desert Soils, G. R. Dutt, J. Hanks
Predicting Nitrogen Transformations And Osmotic Potentials In Warm Desert Soils, G. R. Dutt, J. Hanks
Memorandum
No abstract provided.
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals, G. L. Bender, J. Macmahon, S. Szerlip
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals, G. L. Bender, J. Macmahon, S. Szerlip
Memorandum
No abstract provided.
Biomass And Nutrient Dynamics Of Some Major Cold Desert Shrubs, Neil E. West
Biomass And Nutrient Dynamics Of Some Major Cold Desert Shrubs, Neil E. West
Memorandum
No abstract provided.
Demography, Foraging Activity Of Leaf-Cutter Ants, Acromyrmex Versicolor, In Relation To Colony Size And Location, Season, Vegetation And Temperature, F. G. Werner, S. L. Murray
Demography, Foraging Activity Of Leaf-Cutter Ants, Acromyrmex Versicolor, In Relation To Colony Size And Location, Season, Vegetation And Temperature, F. G. Werner, S. L. Murray
Memorandum
No abstract provided.
Population Studies Of Desert Cottontail, Black-Tailed Jackrabbit And Allen's Jackrabbit In The Sonoran Desert, C. R. Hungerford, C. H. Lowe, J. P. Gray
Population Studies Of Desert Cottontail, Black-Tailed Jackrabbit And Allen's Jackrabbit In The Sonoran Desert, C. R. Hungerford, C. H. Lowe, J. P. Gray
Memorandum
No abstract provided.
Birch Reduction Of Cinnamic Acid, John G. Little
Birch Reduction Of Cinnamic Acid, John G. Little
University of the Pacific Theses and Dissertations
The use of alkali and alkaline earth metals as reducing agents in liquid ammonia solvent for aromatic and conjugated systems has been investigated by chemists at least since the early 1900's, e.g., Lebau and Picon (1). By subsequent additions of a proton source, the system yielded the first successful partial reduction of a monobenzenoid system, as reported by Wooster and Godfrey (2), in 1937. As a result of that success a patent was issued to Wooster for the process (3). Little additional work was reported until Birch and his co-workers picked up the investigation in the early 1940's. It was …
Survey Of Instrumentation For Air Quality Surveillance, John Bowling
Survey Of Instrumentation For Air Quality Surveillance, John Bowling
Retrospective Theses and Dissertations
No abstract provided.
A Mathematical Model For Determining The Thermal Distribution Resulting From Discharge Of A Heated Effluent, Alan H. Epstein
A Mathematical Model For Determining The Thermal Distribution Resulting From Discharge Of A Heated Effluent, Alan H. Epstein
Retrospective Theses and Dissertations
A mathematical model is presented for the problem of determining the two-dimensional temperature distribution resulting from the discharge of a heated effluent into a shallow, quiescent receptacle. The physical model of the problem is the two-dimensional jet augmented by an imposed condition of viscous drag due to bottom friction effects. By virtue of the assumption that the physical properties of the effluent are independent of temperature over the operational temperature range of the plume, the analysis separates the total problem into a flow problem and a temperature problem. Solution of the temperature distribution is accomplished both analytically and numerically. Analytically, …
Solid Waste Management At Florida Technological University, Robert F. Hever
Solid Waste Management At Florida Technological University, Robert F. Hever
Retrospective Theses and Dissertations
This paper is a report on a study of the management of solid wastes at Florida Technological University (FTU). This study endeavors to provide a basis for effective planning for disposal of FTU's solid wastes, both in the next few years and at the time of maximum FTU population. Essentially, the study affirms that the present system of refuse collection by a private contractor is the best method of disposal, with the possibility that recycling of mixed paper may become feasible at some future time.
An Investigation Of Thermal Energy Potential In Florida Lakes As A Power Source To Arrest Conditions Of Oxygen Deficiency, John. Jackson
An Investigation Of Thermal Energy Potential In Florida Lakes As A Power Source To Arrest Conditions Of Oxygen Deficiency, John. Jackson
Retrospective Theses and Dissertations
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.
Diffusiophoretic Forces Between Juxtaposed Atmospheric Particles, Allen L. Williams
Diffusiophoretic Forces Between Juxtaposed Atmospheric Particles, Allen L. Williams
Doctoral Dissertations
"The role of diffusiophoretics and Stefan flow in droplet growth by accretion and in-cloud scavenging is examined. A calculation is made for the diffusive forces between two juxtaposed spheres one or both of which are undergoing diffusional growth and the influence of the diffusive force on the trajectories of two spheres, assumed to obey the creeping flow equations is found. The results are: a) the diffusiophoretic force between two water droplets is zero. b) the diffusiophoretic force between a spherical ice particle and a water droplet, although non-zero, is too small to appreciably influence the fall trajectories. c) the diffusiophoretic …
An Acceleration Technique For A Conjugate Direction Algorithm For Nonlinear Regression, Larry Wilmer Cornwell
An Acceleration Technique For A Conjugate Direction Algorithm For Nonlinear Regression, Larry Wilmer Cornwell
Doctoral Dissertations
"A linear acceleration technique, LAT, is developed which is applied to three conjugate direction algorithms: (1) Fletcher-Reeves algorithm, (2) Davidon-Fletcher-Powell algorithm and (3) Grey's Orthonormal Optimization Procedure (GOOP). Eight problems are solved by the three algorithms mentioned above and the Levenberg-Marquardt algorithm. The addition of the LAT algorithm improves the rate of convergence for the GOOP algorithm in all problems attempted and for some problems using the Fletcher-Reeves algorithm and the Davidon-Fletcher-Powell algorithm. Using the number of operations to perform function and derivative evaluations, the algorithms mentioned above are compared. Although the GOOP algorithm is relatively unknown outside of the …
The Average Dissipation Curve Of An Attenuative Layered Earth Medium, Joong Hee Chun
The Average Dissipation Curve Of An Attenuative Layered Earth Medium, Joong Hee Chun
Doctoral Dissertations
"A feasible method of estimating the attenuative properties of a layered earth medium from a reflection seismogram has been developed. An average attenuation factor of n layers in the least squares sense is designated as ß and its usefulness in real applications is investigated. Techniques of extracting dissipation factors from both noise free and noisy reflection seismic traces are discussed. In order to describe the change of the factors with an increase of depth, an average dissipation curve the form of which is similar to the average velocity of layered medium is also introduced. Both the ß and the average …
Trend Surface Analysis As An Aid In Exploration For Mississippi Valley Type Ore Deposits, John Siegfried Trapp
Trend Surface Analysis As An Aid In Exploration For Mississippi Valley Type Ore Deposits, John Siegfried Trapp
Doctoral Dissertations
"The conditions necessary for emplacement of Mississippi Valley-type mineral deposits can be expressed using mathematical symbols as a function of the pre-depositional topography of the host formation and post-depositional structure. These conditions can be observed and analyzed in the Missouri region from residual maps of trend surface analysis of the Precambrian surface. In areas where the topography prior to deposition of the ore bearing horizon has been strongly altered by the deposition of the basal Paleozoic formation the Lamotte Formation residual maps from trend surface analysis of the top of the Lamotte better illustrate these conditions. The Lamotte Formation in …
Geochemical Anomalies In The Igneous Wall Rock At Mayflower Mine, Park City District, Utah, Zuhair Al-Shaieb
Geochemical Anomalies In The Igneous Wall Rock At Mayflower Mine, Park City District, Utah, Zuhair Al-Shaieb
Doctoral Dissertations
"Approximately 500 samples were collected from the igneous wall rock of the Mayflower Mine, Park City District, Utah. The mine is the sixth largest gold producer in the United States. The samples were analyzed for copper lead, zinc silver, manganese, sodium, potassium, calcium, magnesium and iron by atomic absorption spectrophotometry. Gold was determined by neutron activation analysis, silicon and sulfur by x-ray fluorescence spectrometery. The calculation of the mineral norm from the chemical analysis showed the wall rock to be of granodioritic composition. A study of selected vein samples indicates that the copper, silver and gold content in the veins …
Mathematical Modeling Of River Water Temperatures, Leland Lovell Long
Mathematical Modeling Of River Water Temperatures, Leland Lovell Long
Doctoral Dissertations
"The applicability of power spectral density techniques, Fourier series analysis, and linear regression to the mathematical modeling of river water temperature is demonstrated. Consideration is also given to the problem of estimating thermal inputs to rivers from man-made sources such as electrical power plants. First, power spectral density techniques are used in the time-series analysis of water temperature records which were taken from the Missouri River. Two spectral ranges are then studied from the standpoint of their applicability to (1) mathematical model building and (2) detection and identification of cyclic thermal inputs. Next, a Fourier regression fit to the time-series …
Structure Of Zero Divisors, And Other Algebraic Structures, In Higher Dimensional Real Cayley-Dickson Algebras, Harmon Caril Brown
Structure Of Zero Divisors, And Other Algebraic Structures, In Higher Dimensional Real Cayley-Dickson Algebras, Harmon Caril Brown
Doctoral Dissertations
"Real Cayley-Dickson algebras are a class of 2ⁿ-dimensional real algebras containing the real numbers, complex numbers, quaternions, and the octonions (Cayley numbers) as special cases. Each real Cayley-Dickson algebra of dimension greater than eight (a higher dimensional real Cayley-Dickson algebra) is a real normed algebra containing a multiplicative identity and an inverse for each nonzero element. In addition, each element a in the algebra has defined for it a conjugate element ā analogous to the conjugate in the complex numbers. These algebras are not alternative, but are flexible and satisfy the noncommutative Jordan identity. Each element in these algebras can …
Condensation And Sublimation Of Carbon Dioxide And Water Molecules At Cryogenic Temperatures, Victor Cazcarra
Condensation And Sublimation Of Carbon Dioxide And Water Molecules At Cryogenic Temperatures, Victor Cazcarra
Doctoral Dissertations
"Measurements of the condensation coefficient of CO₂ and H₂O have been made using a molecular beam and quartz crystal microbalances. The dependence of the condensation coefficient on variables such as population density on the substrate, temperature of the substrate, molecular beam intensity and temperature of the molecular beam, was investigated. The results are explained using heterogeneous nucleation theory for low density population, and a new approach for high density population is presented. The rate of sublimation of these two gases was measured directly. The results are reported in terms of vapor pressure in the range 10⁻⁹ to 10⁻⁴ Torr. The …
Quasi-Pseudometrics Over Tikhonov Semifields And Fixed Point Theorems, Ronald Evans Satterwhite
Quasi-Pseudometrics Over Tikhonov Semifields And Fixed Point Theorems, Ronald Evans Satterwhite
Doctoral Dissertations
"It has been shown that topological spaces are characterized as quasi-pseudometric spaces over some Tikhonov semifield.
Sufficient conditions are given for a T1 space to be metrizable over some Tikhonov semifield.
Completely regular (uniform) spaces are characterized as pseudornetric spaces over some Tikhonov semifield.
Certain metric, pseudornetric, quasi-metric, quasipseudometric spaces over a Tikhonov semifield are shown to be respectively metric, pseudometric, quasi-metric, quasipseudometric spaces in the usual sense.
Several results from fixed point theory in the metric space setting are generalized to the setting of completely regular (uniform) Hausdorff spaces."--Abstract, page ii.
Summary Of Trial Results 1972 (February 1973), N. R. Mckeown
Summary Of Trial Results 1972 (February 1973), N. R. Mckeown
Experimental Summaries - Plant Research
1.0.0. Trials in Progress During 1972 observations were made on 16 small plot legume species trials and 11 grazing trials. In 1973 the small plot trials will be reduced to 10. This report summarizes the results from the grazing trials under the following headings:- 2.0.0. Seasonal conditions 3.0.0. Grazing experiments 3.1.0. 68MO23 - Legume grazing management trial, West Moora 3.2.0. 71LG17 - Comparison of production from Cyprus Medic and volunteer pasture 3.3.0. Comparison of production from tornafield medic,serradella and subterranean clover 3.3.1. 70ME2 - Walgoolan 3.3.2. 71WH13 - Wongan Hills 3.3.3. 69MO17 - Watheroo 3.3.4. 69LG24 - Lake Grace 3.4.0. …
1972 - Part 3 - Lupin Cultivar Comparison, G H. Walton
1972 - Part 3 - Lupin Cultivar Comparison, G H. Walton
Experimental Summaries - Plant Research
The 1972 experimental results provide a good comparison between Unicrop and Uniharvest lupin under low rainfall conditions. While most trial results have to be examined in the knowledge of low rainfall confounded with high weed competition, some useful and practical conclusions can be drawn. Trials - 72MO10, 72MT33, 72GE11, 72GE12, 72GE13, 72GE14, 72LG7, 72LG10, 72NO9, 72NO10, 72TS10. Other grain legume variety trials which were not harvestable for lupin varieties - 72AL10, 72ES9, 72LG8, 72LG9, 72NA10, 72NA11, 72TS11, 72WH9,
The Scattering Of Elastic Waves By Void Cavities, Jerry Lee Davis
The Scattering Of Elastic Waves By Void Cavities, Jerry Lee Davis
Doctoral Dissertations
"Elastodynamic multipole theory, the theory of least squares, and the theory of integral representation of solutions are employed in solving certain problems involving an elastic solid containing a source and a scatterer. Both the source and scatterer are of finite geometrical extent; they occupy non-intersecting regions. The source is separable, i.e., its mathematical specification consists of an arbitrary vector function of position multiplied by a time function, which is further assumed to be a sinusoid. The scatterer emphasized is a finite void cavity of arbitrary shape; however, scatterers composed of rigid material may also be treated. The calculation of a …
The Ias Bulletin, V6n1, January 1972, Iowa Academy Of Science
The Ias Bulletin, V6n1, January 1972, Iowa Academy Of Science
IAS Bulletin
In this issue:
--- Officers, Directors, and Section Chairmen, 1971-72
--- Last Call for Papers for the Annual Sessionsat Iowa City
--- Preliminary Planning well Underway
--- Another new Section Being Formed
--- Conservation Education Center Opens
--- Outdoor Classroom to be Part of Academy Farm
--- A Thought for the Day
--- News from the AAAS Convention
--- ISU Member has Proceedings to Give Away
--- AAAS Research Grants Awarded
--- Manuscripts Invited for Future Proceedings
--- Elections Coming up in March
--- Membership Facts
--- Water Resources of Iowa
--- Predicted Job Openings, 1970's
Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, Raymond I. Lynn, Roy E. Cameron
Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, Raymond I. Lynn, Roy E. Cameron
Memorandum
No abstract provided.
Effects Of Early And Late Irrigation In The Net Productivity Of Oryzopsis Hymenoids In Eastern Idaho, Lorentz C. Pearson
Effects Of Early And Late Irrigation In The Net Productivity Of Oryzopsis Hymenoids In Eastern Idaho, Lorentz C. Pearson
Memorandum
No abstract provided.
Rock Valley Validation Site Report, Frederick B. Turner
Rock Valley Validation Site Report, Frederick B. Turner
Memorandum
No abstract provided.
Growth And Development Of Sitanion Hystrix And Poa Sandergii, M. Hironaka, E. W. Tisdale
Growth And Development Of Sitanion Hystrix And Poa Sandergii, M. Hironaka, E. W. Tisdale
Memorandum
No abstract provided.
Reports Of 1971 Progress Volume 3 Terrestrial Validation Studies Part Ii. Individual Sites, U.S. International Biological Program
Reports Of 1971 Progress Volume 3 Terrestrial Validation Studies Part Ii. Individual Sites, U.S. International Biological Program
Progress reports
No abstract provided.
Reports Of 1971 Progress Volume 1 Central Studies, U.S. International Biological Program
Reports Of 1971 Progress Volume 1 Central Studies, U.S. International Biological Program
Progress reports
No abstract provided.