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Articles 288271 - 288300 of 303071
Full-Text Articles in Physical Sciences and Mathematics
Kinetics Of Oxidation Of Bismuth And Bismuth Based Alloys In Air Between 500 And 530 (Degree) K, Magda Ishak Ahmed Waly El-Guindy
Kinetics Of Oxidation Of Bismuth And Bismuth Based Alloys In Air Between 500 And 530 (Degree) K, Magda Ishak Ahmed Waly El-Guindy
Archived Theses and Dissertations
No abstract provided.
Synthesis Of Crown Ethers & Stereochemistry Of 1, 4-Ditertiarybutyl-1, 4-Dihydronaphthalene, Abdolreza-H-Hossein Nejad
Synthesis Of Crown Ethers & Stereochemistry Of 1, 4-Ditertiarybutyl-1, 4-Dihydronaphthalene, Abdolreza-H-Hossein Nejad
Masters Theses & Specialist Projects
A. Cyclization of ethylene oxide in the presence of transition metal salts was studied. Several reactions with different catalysts were tried and some of these reactions produced compounds which show only one sharp singlet in their NMR spectra. These products were also soluble in benzene. The solubility of potassium permanganate in this mixture suggests the presence of cyclic polyethers. In spite of the above observations, all attempts to liberate cyclic ethers from their metal complexes were unsuccessful.
B. In the second project, the stereochemistry of 1,4-ditertiarybuty1- 1,4-dihydronaphthalene was elucidated using 1H and 13C NMR. For this purpose, other …
Emp Analysis Of An Fm Communications Radio With A Long Wire Antenna, George H. Baker Iii, Werner J. Stark
Emp Analysis Of An Fm Communications Radio With A Long Wire Antenna, George H. Baker Iii, Werner J. Stark
George H Baker
A Norton equivalent circuit is developed for a long-wire antenna used with a VHF man-pack FM radio exposed to an incident electromagnetic pulse (EMP). The required short-circuit current and antenna impedance are computed by use of a transmission-line model for the antenna, and the computations are compared with measurements of the short-circuit current and antenna impedance. The comparison shows that the transmission-line model for the antenna is adequate for performing a vulnerability analysis of the radio. A network model is developed for a portion of the radio and is used as the load in the Norton equivalent circuit. Load currents …
A Petrographic And Chemical Study Of Axinite And Scapolite Occurrences In The White Oaks Mining District, Lincoln County, New Mexico, Karen Ricciardi
A Petrographic And Chemical Study Of Axinite And Scapolite Occurrences In The White Oaks Mining District, Lincoln County, New Mexico, Karen Ricciardi
Earth and Planetary Sciences ETDs
The purpose of this thesis is to report and discuss the chemistry and petrology of the axinite and scapolite occurrences in the White Oaks mining district, Lincoln County, New Mexico. Sampling, reconnaissance field geology, chemical analysis of rock samples, petrographic studies, and unit-cell d terminations for axinite and scapolite were completed for this investigation. The data was used to determine the conditions of formation for the axinite and scapolite.
The axinite is found in small pods, or nodules, of marble near the contact with the syenite-monzonite porphyry stock. The variety of axinite is ferroaxinite which occurs with calcite, actinolite, and …
Scs 47: Équivalence Des Espaces De Batdedat Et Des Treillis Algébriques, Karl Heinrich Hofmann
Scs 47: Équivalence Des Espaces De Batdedat Et Des Treillis Algébriques, Karl Heinrich Hofmann
Seminar on Continuity in Semilattices
No abstract provided.
Scs 46: A Result About O(X), Gerhard Gierz, Jimmie D. Lawson, Michael Mislove
Scs 46: A Result About O(X), Gerhard Gierz, Jimmie D. Lawson, Michael Mislove
Seminar on Continuity in Semilattices
No abstract provided.
A Population Of Partial Differential Equations For Evaluating Methods, Elias N. Houstis, John R. Rice
A Population Of Partial Differential Equations For Evaluating Methods, Elias N. Houstis, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
Electron Drift Velocities In Helium-Fluorine Gas Mixtures, Kaare J. Nygaard, John L. Fletcher, Scott R. Hunter, Stephen R. Foltyn
Electron Drift Velocities In Helium-Fluorine Gas Mixtures, Kaare J. Nygaard, John L. Fletcher, Scott R. Hunter, Stephen R. Foltyn
Physics Faculty Research & Creative Works
Using a simple time-of-flight technique, we have measured the electron drift velocity in helium with 0.1-1% fluorine additive. Our results in a 0.1% mixture are in close agreement with data in pure helium. The measured drift velocity increases with increasing fluorine concentration. © 1978, American Institute of Physics. All rights reserved.
Test 1276: White Field Boss 2-155 Dsl 18-Speed, Nebraska Tractor Test Lab
Test 1276: White Field Boss 2-155 Dsl 18-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …
Test 1275: White Field Boss 2-135 Diesel 18-Speed, Nebraska Tractor Test Lab
Test 1275: White Field Boss 2-135 Diesel 18-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …
Crown Ethers : Applications In Inorganic Synthesis, Robert L. Sundberg
Crown Ethers : Applications In Inorganic Synthesis, Robert L. Sundberg
Senior Scholar Papers
The ability of macroheterocyclic compounds to complex with ionic species has led to the synthesis and investigation of many multidentate macroheterocyclic species. The most stable complexes are formed between macrocyclic polyetheral ligands (crown ethers) with alkali or alkaline earth metal iona. There is an excellent correlation of the stability of these complexes with the size of the cation and the site of the cavity in the macrocyclic ligand. Additional factors, such as the basicity of the ligand and the solvating ability of the solvent, also play important roles in the stabilization of the complex. The stability of such complexes has …
Turbulent Transfer Over An Irrigated Crop Under Conditions Of Sensible Heat Advection, Raymond P. Motha
Turbulent Transfer Over An Irrigated Crop Under Conditions Of Sensible Heat Advection, Raymond P. Motha
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Water Current, Volume 10, No. 3, May/June 1978
Water Current, Volume 10, No. 3, May/June 1978
Water Current Newsletter
From the Desk of the Director
Grantsmanship Training Program Planned
Dee Creek Project Funded
Area of Excellence Review
Odgaard New Director of NWRA
National Water Policy Revealed
OWRT Appropriations
Research Review: Region-Wide Irrigation Scheduling by Local Evapotranspiration Measurement
The Natural Growth Records Of Reef-Building Corals, Richard E. Dodge
The Natural Growth Records Of Reef-Building Corals, Richard E. Dodge
Oceanography Faculty Theses and Dissertations
Through analysis of hermatypic coral incremental growth features, it is possible to determine the response of recent corals to their environments. In this way I have attempted to obtain a tool not only to gain knowledge of recent growth processes but also for reconstructing aspects of past environmental conditions associated with fossil coral growth. The procedure has been first to determine time relationships and characteristics of coral skeletal density bands and to next use banding for investigations into areal growth rate patterns, coral population age distributions, and coral-climate interactions.
Density band couplets, visible X-radiographically in medial sections of coral skeletons, …
Volume 2, Number 5 (May 1978), The Otec Liaison
Volume 2, Number 5 (May 1978), The Otec Liaison
The OTEC Liaison
No abstract provided.
The Investigation Of 3,4- Dipheny1-3- Cyclobutene-1, 2-Dione As A Precursor To A Bis-Ketene, John Dana Myers
The Investigation Of 3,4- Dipheny1-3- Cyclobutene-1, 2-Dione As A Precursor To A Bis-Ketene, John Dana Myers
Master's Theses
The purpose of this research is to investigate the use of 3, 4-diphenyl-3-cyclobutene-1, 2-dione as a synthetic precursor to bis-ketenes and ultimately examine the chemical behavior of this relatively unknown system. We intend to investigate some of the chemical behavior of bis-phenylketene produced by the well-documented photochemical ring opening of 3, 4-diphenyl-3-cyclobutene-1, 2-dione. Specifically the use of alkenes a chemical traps for the bis-ketene will be investigated. These reactions will be compared and contrasted to the behavior of the ketenes and vinyl ketenes.
An Experimental Design For The Computational Evaluation Of Elliptic Partial Differential Equations Solvers, Elias N. Houstis, John R. Rice
An Experimental Design For The Computational Evaluation Of Elliptic Partial Differential Equations Solvers, Elias N. Houstis, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
Coordination Chemistry Of Bidentate Difluorophosphines, Darrell Lynn Gallup
Coordination Chemistry Of Bidentate Difluorophosphines, Darrell Lynn Gallup
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The reactions of 1, 2–bis(difluorophosphino)cyclohexane, PF2C6H10PF2, with hexacarbonyls of Cr(O), Mo(O), and W(O) have been extensively investigated. The hexacarbonyls react, either under photolytic or thermolytic conditions, to produce carbon monoxide and oily mixtures of products of the general formulations, [M(CO)4(PF2C6H10PF2C)]x, where x varies apparently from 1 – 4. The higher values of x, corresponding to species involving bridging ligands, are more common to the photolysis rather than the thermolysis reactions. Photolysis reactions of Mo(Co)6 with increasing amounts of the …
Topological Properties Of C(X, Y), Chris Alan Schwendiman
Topological Properties Of C(X, Y), Chris Alan Schwendiman
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this paper is to examine the important topological properties of the function spaces BC(X,Y) and C(X,Y). Emphasis is given to the relationship between the metrizability of X and the separability of these function spaces. The paper is divided into three major parts: the preliminary definitions and theorems; the relationship between the topological properties of X and BC (X ,Y), for compact X; and the extension of the results of Part II for X not compact and for the case when we have C(X, Y).
Conflict In Outdoor Recreation, Gerald R. Jacob
Conflict In Outdoor Recreation, Gerald R. Jacob
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The causes of conflict among users of outdoor recreation resources have received little attention from recreation researchers. Knowledge of factors responsible for conflict might assist recreation planners' attempts to reduce future instances of conflict and help management focus its conflict resolution efforts. A theory of conflict is offered as the first step in systematically procuring such knowledge. A definition and characteristics of outdoor recreation conflicts are presented; four comprehensive causes of user conflicts are proposed. Ten propositions are used to link these factors to conflict and suggest future research hypotheses. The social psychological dynamics of conflict, as described here, have …
A Discriminant Function Model Of Gray-Headed Junco Habitat, Andrew R. Grainger
A Discriminant Function Model Of Gray-Headed Junco Habitat, Andrew R. Grainger
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This paper presents a description of gray-headed junco habitat in the form of a model based on discriminant function analysis. Junco nests were found by searching randomly located grids on a 7.8 km2 study area in central Utah. Vegetation data was gathered on 500 m2 circular plots surrounding nests and contrasted with similar data from searched grids where nests were not found. The model explains 28 percent of the between-groups variance and correctly classifies 68 percent of the plots.
Plant cover types are good predictors of areas where gray-headed juncos nest, while plant community type descriptions do not …
Adaptive Significance Of Lactate Dehydrogenase B2 Isozymes In Rainbow Trout, Salmo Gairdneri And A Biochemical Genetic Comparison Of Cutthroat Trout (Salmo Clarki) Populations, Gerald Thomas Klar
Adaptive Significance Of Lactate Dehydrogenase B2 Isozymes In Rainbow Trout, Salmo Gairdneri And A Biochemical Genetic Comparison Of Cutthroat Trout (Salmo Clarki) Populations, Gerald Thomas Klar
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Rainbow trout lactate dehydrogenase (LDH) B2' B2' , B2' B2" and B2" B2" phenotypes were tested under a variety of conditions for swimming endurance, oxygen consumption rates, and blood pH, pO2, and lactate. The B2" B2" phenotype exhibited a lower swimming endurance, under a limited oxygen supply, than the B2' B2' and B2' B2" phenotypes. Blood pH at fatigue did not differ among the LOH phenotypes that swam under low oxygen conditions (2 mg/1). …
Population Dynamics And Net Production Of Brown Trout (Salmo Trutta) In Two Areas Of A High Gradient Mountain Stream, Jeffrey C. Gosse
Population Dynamics And Net Production Of Brown Trout (Salmo Trutta) In Two Areas Of A High Gradient Mountain Stream, Jeffrey C. Gosse
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Estimates of the brown trout (Salmo trutta) population were made in two areas of the Blacksmith Fork River, Cache County, Utah, from June 1972 to June 1973. Additional data were obtained on movement, growth, mortality, biomass, production, and yield.
Population density was highly variable in the area where habitat alterations had occurred, but was relatively uniform where the habitat was undisturbed. The brown trout exhibited little movement except during spawning season. Instantaneous growth and mortality rates are provided for each age group.
Mean annual biomass in the two areas was 12.0 and 10.2 grams per square meter and …
Movements And Activity Patterns Of The Plains Pocket Gopher (Geomys Bursarius) In Nebraska, Dallas Virchow
Movements And Activity Patterns Of The Plains Pocket Gopher (Geomys Bursarius) In Nebraska, Dallas Virchow
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
An Input-Output Analysis Of The Soviet Fleet In Icnaf Areas 5 And 6, 1961-1973, F. Robert Bauer
An Input-Output Analysis Of The Soviet Fleet In Icnaf Areas 5 And 6, 1961-1973, F. Robert Bauer
Marine Affairs Theses and Major Papers
One of the goals of the Fishery Conservation and Management Act of 1976 was the rebuilding of the American fishing industry. However, the Act does not give the U.S.fisherman exclusive rights to the fishery resource. The American fisherman will still be competing with the foreign fleets. Section 204 (b) (1) of the Fishery Conservation and Management Act of 1976. states: Each foreign nation with which the United States has entered into a governing international agreement shall submit an application to the Secretary of State each year for a permit for each of its fishing vessels to engage in fishing described …
Present Trends In The Development Of Marine Fisheries By Coastal States Of The East Central Atlantic, Ethman T. A. Golley-Morgan
Present Trends In The Development Of Marine Fisheries By Coastal States Of The East Central Atlantic, Ethman T. A. Golley-Morgan
Marine Affairs Theses and Major Papers
In order to create an incentive for a rapid development of the rural-based artisanal fisheries of coastal states, that can actively compete with large scale industrial fisheries of non-coastal states as well as coastal states of the region, some states are now moving towards an integrated approach in their development efforts. Such integrated projects will take into consideration rural development, provision of infrastructural facilities for fish handling and processing, vessel servicing, repairs and boat building. Socio-economic factors such as organization of fishermen's cooperatives, financing and marketing institutions are also vital inputs.
Physiological Response To Hooking Stress In Largemouth Bass (Micropterus Salmoides), A. Wayne Gustaveson
Physiological Response To Hooking Stress In Largemouth Bass (Micropterus Salmoides), A. Wayne Gustaveson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Recent concern about large initial and delayed mortalities resulting from tournament angling for largemouth bass has indicated that it would be desirable to further evaluate the fate of fish that are released after being captured by angling. This study was designed to evaluate sublethal physiological disruptions caused by hooking stress after largemouth bass were played under standardized conditions (0-5 minutes) and to estimate the time needed for recovery of the homeostatic mechanisms (to 72 hours). Blood lactate was used as a measure of metabolic fatigue; plasma osmolality and chloride measurements were used to evaluate osmoregulatory disturbances and gill ion-exchange; and …
On The Relative Behavior Of Estimators Of Reliability/Survivability, Danny D. Dyer, Onas L. Hensley, Jerome P. Keating
On The Relative Behavior Of Estimators Of Reliability/Survivability, Danny D. Dyer, Onas L. Hensley, Jerome P. Keating
Mathematics Technical Papers
Based on a decomposition of mean absolute error, a twofold technique is introduced whereby a pairwise comparison of point estimators of reliability/survivability can be made. Given two such estimators, the method examines (a) the "odds" in favor of one of the estimators being closer to the true value than is the other and (b) each estimator's average closeness to the true value not only when it is closer than is the other but also when it is not. Joint consideration of these concepts is shown to form a basis for determining which of the two estimators is preferred in a …
How Bad Can Good Data Really Be?, William (Bill) H. Williams
How Bad Can Good Data Really Be?, William (Bill) H. Williams
Publications and Research
Bias has different sources. Measurement errors create "bad" data and biased estimates. But selection biases occur even with "good" data and can be both subtle and large in magnitude.
Separation And Monotonicity Results For The Roots Of The Moment Problem, Jerome Eisenfeld, James Hallmark
Separation And Monotonicity Results For The Roots Of The Moment Problem, Jerome Eisenfeld, James Hallmark
Mathematics Technical Papers
Consider the system identification problem [see pdf for notation] [see pdf for notation] where u(t) and y(t) are given discretely on the interval [see pdf for notation] and we wish to determine information about the unknown constant matrices A, B, and C. Many techniques are available for approaching this problem. Several of these methods lead to what is known as the moment problem, [1]-[6]. This paper pertains to the moment problem which will now be introduced.