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Articles 286141 - 286170 of 303795
Full-Text Articles in Physical Sciences and Mathematics
Stratigraphy Of A Pennsylvanian Deltaic Sequence In Russellville, Arkansas, Christopher F. Moyer, Ken Fritsche
Stratigraphy Of A Pennsylvanian Deltaic Sequence In Russellville, Arkansas, Christopher F. Moyer, Ken Fritsche
Journal of the Arkansas Academy of Science
No abstract provided.
Reconnaissance Of Ground-Water Resources Of Stone And Independence Counties, Arkansas, Albert E. Ogden, James R. Musgrove, Lisa Milligan
Reconnaissance Of Ground-Water Resources Of Stone And Independence Counties, Arkansas, Albert E. Ogden, James R. Musgrove, Lisa Milligan
Journal of the Arkansas Academy of Science
No abstract provided.
Sr/Mg Ratios Of Pennsylvanian Limestone Units In Northwest Arkansas, George H. Wagner, Kenneth F. Steele, Doy L. Zachry
Sr/Mg Ratios Of Pennsylvanian Limestone Units In Northwest Arkansas, George H. Wagner, Kenneth F. Steele, Doy L. Zachry
Journal of the Arkansas Academy of Science
No abstract provided.
Extensions, Generalizations, Characterizations And Testing For Independence Through Infinite Divisibility, Edward Joul Danial
Extensions, Generalizations, Characterizations And Testing For Independence Through Infinite Divisibility, Edward Joul Danial
Doctoral Dissertations
This dissertation investigates various related topics around the exciting concept: "Infinite Divisibility." First, two intricate distributions, namely, the univariate generalized Waring and the hyper-Poisson are proved to be infinitely and noninfinitely divisible, respectively. Analysis and computer approaches are employed. This itself extends the use of some results introduced by Katti, Steutel and Warde. Secondly, generalizations to Warde, Katti and Steutel's sufficient conditions and related results are achieved. Then, numerical application is presented. Thirdly, characterizations through infinite and finite divisibility are obtained. The Poisson, negative binomial, geometric, Bernoulli and uniform c haracterizations in terms of infinite divisibility are deduced. Some of …
Mineralogical, Textural, And Paragenetic Studies Of Selected Ore Deposits Of The Southeast Missouri Lead-Zinc-Copper District And Their Genetic Implications, Kenneth Bruce Horrall
Mineralogical, Textural, And Paragenetic Studies Of Selected Ore Deposits Of The Southeast Missouri Lead-Zinc-Copper District And Their Genetic Implications, Kenneth Bruce Horrall
Doctoral Dissertations
“A detailed paragenetic study of Pb-Zn-Cu ores from the Viburnum Number 28, Brushy Creek, and Goose Creek mines in the Southeast Missouri lead district indicates a complicated paragenesis characterized by repeated periods of mineral deposition. The sequence is composed of nineteen minerals including abundant galena, sphalerite, chalcopyrite, pyrite, marcasite, dolomite, calcite, and quartz and minor siegenite, bornite, bravoite, blaubleibender covellite, covellite, gersdorffite, digenite, enargite, tennantite, dickite, and malachite.
The paragenesis indicates that the ore solutions evolved in the following order: (1) Cu-rich, (2) Co-Ni-rich, (3) Pb-Zn-rich, and (4) Fe-rich. Subsequent repeated generations include cubic galena, later sphalerite, and minor crystalline …
An Approximation Theorem In Shape Theory, Gerard A. Venema
An Approximation Theorem In Shape Theory, Gerard A. Venema
University Faculty Publications and Creative Works
In this paper it is shown that if X is a compactum in the interior of a PL manifold M and if U is a neighborhood of X in M, then there is a compactum X′ in U such that X and X′ have the same relative shape in U and the embedding dimension of X′ equals the fundamental dimension of X. Whenever the dimension of M is not equal to three, the relative shape equivalence from X′ to X can be realized by an infinite isotopy of M.
Quaternary Chronology Of The Palouse Loess Near Washtucna, Eastern Washington, Lucy L. (Lucy Louglin) Foley
Quaternary Chronology Of The Palouse Loess Near Washtucna, Eastern Washington, Lucy L. (Lucy Louglin) Foley
WWU Graduate School Collection
Four roadcuts in the Palouse loess near Washtucna, southeastern Washington, expose a thick sequence of buried calcic soils and tephra layers which span more than the last 730,000 years. The identification of four tephra layers of known age in the upper part of the loess sequence
(Mazama, Mt. St. Helens Set S, and two separate layers of Mt. St. Helens Set C) allow the formulation of a soil chronology for the last 40,000 years. Paleomagnetic stratigraphy resulted in the identification of the Brunhes Normal-Matuyama Reversed polarity epoch boundary in one roadcut, thereby establishing an age of at least 730,000 years …
Shape Parameters For The Parametric Cubic Curve, J. A. Conly, R. L. Tennison
Shape Parameters For The Parametric Cubic Curve, J. A. Conly, R. L. Tennison
Mathematics Technical Papers
No abstract provided.
A New Approach To The Stability Theory Of Functional Differential Systems, G. R. Shendge
A New Approach To The Stability Theory Of Functional Differential Systems, G. R. Shendge
Mathematics Technical Papers
In the study of stability theory for delay differential equations using Lyapunov functions and the theory of differential inequalities, it becomes necessary to choose an appropriate minimal class of functions relative to which [see pdf for notation] is estimated [3]. This approach has recently been recognized [3] as a very natural method in the study of the qualitative behavior of delay differential equations.
Paleocene Coal-Bearing Sediments Of The Williston Basin, North Dakota : An Interaction Between Fluvial Systems And An Intracratonic Basin, Laramie M. Winczewski
Paleocene Coal-Bearing Sediments Of The Williston Basin, North Dakota : An Interaction Between Fluvial Systems And An Intracratonic Basin, Laramie M. Winczewski
Theses and Dissertations
Outcrop and test hole data for 225 sites in a 33,700-km2 area of southwestern North Dakota were examined. Seven sedimentation intervals were identified for the Paleocene Bullion Creek and Sentinel Butte Formations. The intervals extend from the top of the Harmon coal (lower Bullion Creek) to the top of the Twin Buttes coal (upper Sentinel Butte). Each interval consists of medium and fine elastics underlying a persistent lignite coal, or some other lithology at the stratigraphic position of the coal. Clastics are finer-grained upwards within intervals and within both formations to the upper Sentinel Butte.
Sand-rich zones align northwest-southeast, …
Electrochemical Determination Of The Heterogeneous Electron Transfer Kinetics Of Soluble Spinach Ferredoxin, Charlene D. Crawley
Electrochemical Determination Of The Heterogeneous Electron Transfer Kinetics Of Soluble Spinach Ferredoxin, Charlene D. Crawley
Theses and Dissertations
The application of electrochemical techniques to biological systems has become an attractive method for characterizing the redox and electron transfer behavior of biomacromolecules. This study focuses on the role of soluble spinach ferredoxin (Fd) in photosynthesis where it functions as an electron carrier to membrane bound species in the plant chloroplast. An electrochemical model is used where in Fd now serves as a soluble redox species which undergoes oxidation and reduction via electron transfer at an electrode. This type of model is significant in that both the membrane and electrode reactive sites are characterized by charged bilayer interfacial regions which …
Depositional Environments And Diagenesis Of The Ratcliffe Interval, Madison Group (Mississippian), Williston Basin, North Dakota, Diane M. Catt
Depositional Environments And Diagenesis Of The Ratcliffe Interval, Madison Group (Mississippian), Williston Basin, North Dakota, Diane M. Catt
Theses and Dissertations
The Ratcliffe interval in North Dakota is a log marker-defined unit in the Williston Basin. It is Mississippian in age and crosscuts the lower Charles and upper Mission Canyon Formations of the Madison Group. Study of cross-sections, well core, and thinsections show that the Ratcliffe is comprised of six major facies: 1) brachiopod-bryozoan-echinoderm wackestone/packstone, 2) peloid packstone/wackestone, 3) oolite-peloid packstone, 4) laminated mudstone, 5) quartz siltstone packstone, and 6) anhydrite-dolomite mudstone. These facies were deposited in a regressive setting.
The initial deposition consisted mainly of marine limestones. The environment gradually became more restricted and deposition of large amounts of anhydrite …
Some Reactions Of Neamine Derivatives, Deena A Boraie
Some Reactions Of Neamine Derivatives, Deena A Boraie
Archived Theses and Dissertations
No abstract provided.
Richard Whately And The Revival Of Syllogistic Logic In Great Britain In The Early Nineteenth Century, Calvin Jongsma
Richard Whately And The Revival Of Syllogistic Logic In Great Britain In The Early Nineteenth Century, Calvin Jongsma
Faculty Work Comprehensive List
Richard Whately's Elements of Logic in 1826 marked the end of a dismal era in the history of British logic. His work sparked a revival in Britain, culminating in several distinct developments, none of which, however, Whately contributed to. Yet his work laid the foundation for them by providing a spirited defense of the syllogism and of deductive reasoning generally.
The first chapter begins with a systematic synopsis of the criticisms and responses which were made from the seventeenth to the early nineteenth century. These related primarily to the nature of logic and the epistemic utility of syllogistic reasoning, but …
An Investigation Of Sand Transport Phenomena In The Rappahannock River Estuary, Virginia, Charles Joseph Natale
An Investigation Of Sand Transport Phenomena In The Rappahannock River Estuary, Virginia, Charles Joseph Natale
Dissertations, Theses, and Masters Projects
Quantitative evidence supplied by bottom sediment textural analysis, Fourier grain-shape analysis and Q-mode factor analysis indicate that river-borne sand-sized sediment originating in the upper reaches of the Rappahannock is actively transported downstream and ultimately delivered to the estuarine sediment regime. Current velocity observations in the upper estuary as well as suspended sediment concentrations measured at stream gaging stations, indicate that short-term extreme hydrological events such as periodic river flooding provide a plausible transport mechanism to move river-borne sands into the estuarine sediment regime.Events of this nature can disrupt average partly-mixed estuarine circulation patterns by displacing the salt-wedge to a more …
Entropy Measure In Input-Output Analysis, Martin Zwick, Abbas Heiat
Entropy Measure In Input-Output Analysis, Martin Zwick, Abbas Heiat
Systems Science Faculty Publications and Presentations
Applications of Shannon's entropy measure to the matrices of technical and interdependence coefficients, to the final demand vector, and to other aspects of input- output tables are proposed. These entropy measures serve as indices of different types of economic diversity. The relevance of such indices for economic planning and for analyses of economic structural complexity and development is discussed.
Controlling The Number Of Metal Sites To Which A Poly(Tertiary Phosphine) Coordinates To Group 6 Metal Carbonyls, Nestor Paul Hansen
Controlling The Number Of Metal Sites To Which A Poly(Tertiary Phosphine) Coordinates To Group 6 Metal Carbonyls, Nestor Paul Hansen
Masters Theses
The compounds trisdiphenylphosphine(tricarbonyl) metal and trisdiphenylvinylphosphine(tricarbonyl) metal of molybdenum and tungsten were prepared. These compounds were allowed to react with diphenylvinylphosphine and diphenylphosphine, respectively, in the presence of azobis(2-methyipropio)nitrile or potassium t-butoxide to yield the complex containing bis(diphenylphosphino) ethane as a chelated ligand.
The tris-substituted compounds showed a large degree of lability which prevented the isolation of the desired, (OC)3M(Ph2PCH2CH2PPh2)3, compound which contains three ditertiary phosphines acting as monodentate ligands.
Coordinated diphenylphosphine and diphenylvinylphosphine pentacarbonyl compounds of chromium, molybdenum and tungsten were prepared and allowed to react in …
Diffusion And Trapping Of Positive Muons In Niobium And In Aluminum Alloys, Muhammad Zillulhaq Numan
Diffusion And Trapping Of Positive Muons In Niobium And In Aluminum Alloys, Muhammad Zillulhaq Numan
Dissertations, Theses, and Masters Projects
Zero, longitudinal and transverse magnetic field uSR has been used to investigate (mu)('+) diffusion and trapping in Nb. The ambiguity in the interpretation of the 'double humped' temperature dependence of the depolarisation rate for the transverse field case has been resolved. A discussion of how the zero and longitudinal measurements can distinguish between the trapping and detrapping phenomena is presented with (mu)SR data analysis in mind. Muon mobility is shown to increase monotonically with temperature. The width of the local magnetic field distribution due to Nb nuclear moments and the rate for trapping and detrapping of muons have been measured …
A [Mu]+Srstudy Of Uniaxial Stress Induced Symmetry Breaking In An Fe Single Crystal, Min. Namkung
A [Mu]+Srstudy Of Uniaxial Stress Induced Symmetry Breaking In An Fe Single Crystal, Min. Namkung
Dissertations, Theses, and Masters Projects
For the first time, external uniaxial stress has been used in a (mu)('+)SR experiment. The stress dependences of the following parameters were obtained for Fe crystals: the muon precessional frequency, (nu)(,(mu)), the transverse (longitudinal) depolarization rates, 1/T(,2) (1/T(,1)), and F(,T)/F(,L), the ratio of the probabilities for the muon to find domains with transverse/longitudinal fields. The shift in (nu)(,(mu)) was -0.34 (+OR-) 0.023 MHz per 100 micro-strain along the -axis. Changes in other parameters depend on the sample history but they, in general, increase with stress.;External stress changes the muon occupational probability at each site which significantly affects the dipolar field …
Experimental Studies Of Antiprotonic Atoms In Hydrogen And Helium, Jeffrey Robert Lindenmuth
Experimental Studies Of Antiprotonic Atoms In Hydrogen And Helium, Jeffrey Robert Lindenmuth
Dissertations, Theses, and Masters Projects
In an experiment performed at Brookhaven National Laboratory the spectra of atomic x rays from stopped antiprotons in gaseous helium, liquid hydrogen, and gaseous hydrogen were measured. The measurements were performed at 1 atmosphere and 25(DEGREES)K for the gaseous target.;In the case of He the L and M series of p were observed and relative intensities measured. However in hydrogen no x rays were observed and thus only an upper limit of the yields of the K series in liquid and gaseous hydrogen were calculated.
A Laser Interferometric Study Of Electric Field Effects On Methane-Oxygen Flame Plasmas, Mark D. Prairie
A Laser Interferometric Study Of Electric Field Effects On Methane-Oxygen Flame Plasmas, Mark D. Prairie
Masters Theses
A laser interferometer is developed to study the refractive index field, aerodynamic structure, and three dimensional temperature profile of a methane-oxygen flame system under the influence of D.C. electric fields. A combined graphical-numerical method is used to transform the observed interference patterns into radial temperature distributions. The results indicate that the electric field exerts a marked influence on the flame stability, geometry, and charged particle flow. Experimental evidence shows that these effects are most apparent under fuel rich conditions. It is suggested an electric field may change the concentration gradients of reacting species, leading to an altered course of fuel …
Cleavage And Deoxygenation Of Phenolic Ethers, Derhsing Luu
Cleavage And Deoxygenation Of Phenolic Ethers, Derhsing Luu
Masters Theses
Dibromotriphenylphosphorane (DTP) in acetonitrile at 50°C was found to cleave ß-naphthylmethyl phenyl ether in preference to ß-naphthyl benzyl ether, 62% and 30% cleavage, respectively. Reaction of ß-naphthyl benzyl ether in dichloromethane at reflux produced 67% cleavage.
The quasiphosphonium complexes obtained by reaction of phenolic compounds with DTP were found to be reduced by several reducing reagents to give the corresponding aromatic hydrocarbons. Reaction of p-cresol with DTP, followed by lithium aluminum hydride reduction gave 38% toluene; sodium naphthalide reduction in THF gave 32% toluene; sodium in liquid ammonia reduction gave 12% toluene; sodium naphthalide reduction in DMF gave 15% toluene. …
The Interaction Of R. Leguminosarum 128c53 With Pea Root Proteins And A Comparison Of The Surface Polysaccharide With A Mutant Defective In Nodulation, Ru-Po Lee
Masters Theses
The Rhizobium extracellular polysaccharides (EPS) and lipopolysaccharides (LPS) are implicated in the symbiotic process. The interaction between host root protein fractions and symbiont EPS-polyacrylamide affinity support has been investigated. Ten percent root protein fractions had been observed to bind to the affinity support. The compositions of the polysaccharides from the parent R. leguminosarum and its Exo-1 mutant have also been compared. The Exo-1 mutant produces diminished amount of EPS and does not nodulate the host pea roots. Five kinds of polysaccharides from the parent were obtained: EPS, capsule polysaccharides (CPS I) washed from the bacteria with saline solution, …
A Comparison Of The Surface Polysaccharides From Rhizobium Japonicum Strains I110ars And 61a76str, And The Isolation Of Soybean Root Proteins Responsible For The Binding Of Eps From R. Japonicum Strain I110ars, Richard F. Koehler
Masters Theses
The surface polysaccharides of Rhizobium are implicated in the symbiotic process. The composition of the surface polysaccharides from two strains of Rhizobium japonicum, I110 ARS and 61A76 str, have been compared. Five polysaccharide fractions are obtained from the I110 ARS strain. They are the EPS (extracellular polysaccharide), CPS-1 and CPS-2 (capsular polysaccharide fractions), LPS (lipopolysaccharide) and Phe (polysaccharide found in the phenol layer from the phenol/water extraction). These polysaccharide fractions have identical sugar compositions. Four polysaccharide fractions are obtained from the 61A76 str strain. These are the EPS, CPS-1, SmPS (small molecular weight polysaccharide), and Phe. Each of these …
A Comparison Of The Surface Polysaccharides Of Rhizobium Trifolii Su843 With Its Genetically Altered Mutant, 8002, Which Is Defective At Root Hair Curling (Hac-), Elroy Alfredo Turnbull
A Comparison Of The Surface Polysaccharides Of Rhizobium Trifolii Su843 With Its Genetically Altered Mutant, 8002, Which Is Defective At Root Hair Curling (Hac-), Elroy Alfredo Turnbull
Masters Theses
Bacteria of the genus Rhizobium are capable of forming a complex nitrogen fixing (fix+) symbiotic association with leguminous plants. The surface polysaccharides are believed to be essential in the symbiotic process. The surface polysaccharides of a genetically altered Rhizobium trifolii mutant, 8002--which does not cause root hair curling (HAC-), forms no nodules (Nod-) nor fixes nitrogen (Fix-)--is compared with its parent, SU843, which causes root hair curling (HAC+), forms nodules (Nod+), and fixes nitrogen (Fix+). Three types of surface polysaccharides--extracellular polysaccharide(s) (EPS), capsular polysaccharide(s) (CPS), and …
Flume Experiments On Bedforms And Structures At The Dune-Plane Bed Transition, Francis P.J. Lockett
Flume Experiments On Bedforms And Structures At The Dune-Plane Bed Transition, Francis P.J. Lockett
Theses and Dissertations (Comprehensive)
A tiltable, recirculating flume, 18 metres long and 76 cm. wide was used to investigate bedforms and structures near the transition between dunes and a plane bed for a moderately sorted, coarse sand. At Froude numbers ranging from about 0.4 to 1.0, three dune types developed: (1) asymmetrical (triangular) dunes, (2) convex (symmetrical) dunes and (3) humpback (whaleback) dunes. Asymmetrical dunes had gentle, long stoss sides and steep, short lee sides and contained cross-stratification with a maximum dip mostly about 30 degrees to 35 degrees. Flow separation and avalanching were strongly developed to the lee of these dunes. Convex dunes …
Structural Properties Of Ideals, J. Baumgartner, A. Taylor, Stan Wagon
Structural Properties Of Ideals, J. Baumgartner, A. Taylor, Stan Wagon
Stan Wagon, Retired
No abstract provided.
Y Expansion For Directed Lattice Animals, Anthony Day, T. Lubensky
Y Expansion For Directed Lattice Animals, Anthony Day, T. Lubensky
Anthony Roy Day
No abstract provided.
Path-Integrals And The Wkb Approximation, Br Holstein, Ar Swift
Path-Integrals And The Wkb Approximation, Br Holstein, Ar Swift
Barry R Holstein
The WKB approximation is demonstrated to be formally identical to the semiclassical limit of the Feynman path integral propagator. In the limit that the path integral propagator is dominated by the classical particle trajectory, it is identical to the propagator calculated directly from WKB wave functions in the stationary phase approximation.
Effects Of Earthquake On Traditional Houses Of Kathmandu, Bhishna Bajracharya