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Articles 286621 - 286650 of 303690

Full-Text Articles in Physical Sciences and Mathematics

A Stratigraphic And Geochemical Investigation Of Ferruginous Bauxite Deposits In The Salem Hills, Marion County, Oregon, Charles William Hoffman Jan 1981

A Stratigraphic And Geochemical Investigation Of Ferruginous Bauxite Deposits In The Salem Hills, Marion County, Oregon, Charles William Hoffman

Dissertations and Theses

Pacific Northwest ferruginous bauxite deposits have formed in four main areas of northwestern Oregon and southwestern Washington by laterization of flows of the Columbia River Basalt Group (CRBG). The deposits, averaging 36.3% Al2O3 , 31.8% Fe2O3 , and 5.9% Sio2, generally occur near the surface of hilltops in gently rolling areas. Two very different views have been advanced regarding the setting in which the deposits have formed. The first hypothesis calls for a blanket-type laterization by erosion of much of the original deposit upon uplift and dissection of the area.

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The Influence Of Halloysite Content On The Shear Strength Of Kaolinite, Reka Katalin Gabor Jan 1981

The Influence Of Halloysite Content On The Shear Strength Of Kaolinite, Reka Katalin Gabor

Dissertations and Theses

The objective of this thesis is to determine the relative shear strengths of halloysite, kaolinite, synthetic mixtures, and local soils, to investigate the influence of halloysite content on the shear strength of kaolinite, and to explore the possibility that the strength properties of soil clays might be controlled by the relative content of their component minerals.

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The Stratigraphy And Structure Of The Columbia River Basalt Group In The Bull Run Watershed, Multnomah And Clackamas Counties, Oregon, Beverly Frobenius Vogt Jan 1981

The Stratigraphy And Structure Of The Columbia River Basalt Group In The Bull Run Watershed, Multnomah And Clackamas Counties, Oregon, Beverly Frobenius Vogt

Dissertations and Theses

Approximately 150 meters (500 feet) of Grande Ronde Basalt and 140 meters (450 feet) of Wanapum Basalt of the Columbia River Basalt Group are exposed in the Bull Run Watershed. In Bull Run, the Grande Ronde Basalt is divided into three mappable units: "low Mg" R2 (at least one flow), "low Mg" N2 (approximately four flows), and "high Mg" N2 (two to three flows}. The Wanapum Basalt is represented by two members: Frenchman Springs Member (six flows) and Priest Rapids Member (one flow). These units are identified by instrumental neutron activation analysis, paleomagnetism based on measurements with …

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The Design Of Oxygen Rebreather Equipment For Use In Foul-Air Speleology, Donald A. Mcfarlane Jan 1981

The Design Of Oxygen Rebreather Equipment For Use In Foul-Air Speleology, Donald A. Mcfarlane

WM Keck Science Faculty Papers

The design of a lightweight oxygen rebreather set suitable for short duration explorations in foul-air caves is described, together with a discussion of its performance, limitations, and possible improvement.

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Effect Of Solvent On Properties Of The Liquid Metal Surface, J. P. Badiali, M. I. Rosinberg, Jerry Goodisman Jan 1981

Effect Of Solvent On Properties Of The Liquid Metal Surface, J. P. Badiali, M. I. Rosinberg, Jerry Goodisman

Chemistry - All Scholarship

We calculate the difference in the surface potentials between the free surface of a liquid metal and the same metal in an ideally polarizable interface at the point of zero charge. This difference, δXm, is due to the deformation of the electronic cloud of the metal by the solvent molecules. The simple model used for the free (metal-metal vapor) surface yields qualitatively correct work functions for a number of metals (Hg, Cd, In, Zn, Pb, Ga, A1). Two simple ways to model the metal-solvent interaction are proposed and calculations of δXm made for each. One, the dielectric film model, considers …

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Acidification Of Minnesota Soils By Nitrogen Fertilization And Acid Rain, Paul R. Bloom, William M. Schuh, W. W. Nelson Jan 1981

Acidification Of Minnesota Soils By Nitrogen Fertilization And Acid Rain, Paul R. Bloom, William M. Schuh, W. W. Nelson

Journal of the Minnesota Academy of Science

The effect of inputs of acidifying nitrogen fertilizer and acid rain on the pH of a typical Minnesota prairie agricultural soil was estimated. Experimental data from a long term continuous corn experiment at the Southwest Experiment Station near Lamberton were used to calculate the effects of nitrogen fertilizers. Acid rain effects were estimated using soil buffering data obtained in the experiment along with existing estimates of rainfall acidity. In a typical corn-soybean rotation, using 100 kg per ha of nitrogen additions to corn, a 0 .25 unit pH drop is expected in about 38 years. The estimated acidity of the …

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Higher Dimensional Orthogonal Designs And Hadamard Matrices, Joseph Hammer, Jennifer Seberry Jan 1981

Higher Dimensional Orthogonal Designs And Hadamard Matrices, Joseph Hammer, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

When n2 elements are given they can be arranged in the form of a square, similarly when ng elements (g ≥ 3 an integer) are given they can be arranged in the form of a g-dimensional cube of side n (in short a g-cube). The position of the elements can be indicated by g suffixes.

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Operational Analysis Of Queues With General Service Times, Jeffrey A. Brumfield, Peter J. Denning Jan 1981

Operational Analysis Of Queues With General Service Times, Jeffrey A. Brumfield, Peter J. Denning

Department of Computer Science Technical Reports

No abstract provided.

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Vlsi Algorithms For Relational Database Operations, Ching C. Hsiao, Lawrence Snyder Jan 1981

Vlsi Algorithms For Relational Database Operations, Ching C. Hsiao, Lawrence Snyder

Department of Computer Science Technical Reports

No abstract provided.

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Overview Of The Blue Chip Computer, Lawrence Snyder Jan 1981

Overview Of The Blue Chip Computer, Lawrence Snyder

Department of Computer Science Technical Reports

No abstract provided.

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Metamodeling And Its Application To Queueing Networks, Jeffrey P. Buzen, Subhash C. Agrawal Jan 1981

Metamodeling And Its Application To Queueing Networks, Jeffrey P. Buzen, Subhash C. Agrawal

Department of Computer Science Technical Reports

No abstract provided.

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The Aggregate Server Method For Analyzing Serialization Delays In Computer Systems, Subhash C. Agrawal, Jeffrey P. Buzen Jan 1981

The Aggregate Server Method For Analyzing Serialization Delays In Computer Systems, Subhash C. Agrawal, Jeffrey P. Buzen

Department of Computer Science Technical Reports

No abstract provided.

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Restruct: A Specification-Driven File Transformation Tool, James D. Arthur, Douglas E. Comer Jan 1981

Restruct: A Specification-Driven File Transformation Tool, James D. Arthur, Douglas E. Comer

Department of Computer Science Technical Reports

No abstract provided.

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The Response Times Of Priority Classes Under Preemptive Resume In M/M/M Queues, J. P. Buzen, A. Bondi Jan 1981

The Response Times Of Priority Classes Under Preemptive Resume In M/M/M Queues, J. P. Buzen, A. Bondi

Department of Computer Science Technical Reports

No abstract provided.

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Some Results On Perfect, Static-Key Hashing, Eric Dittert, Michael J. O'Donnell Jan 1981

Some Results On Perfect, Static-Key Hashing, Eric Dittert, Michael J. O'Donnell

Department of Computer Science Technical Reports

No abstract provided.

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Error Analysis Of Homogeneous Mean Queue And Response Time Estimators, Jeffrey A. Brumfield, Peter J. Denning Jan 1981

Error Analysis Of Homogeneous Mean Queue And Response Time Estimators, Jeffrey A. Brumfield, Peter J. Denning

Department of Computer Science Technical Reports

No abstract provided.

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Processor Displacement: An Area-Time Trade-Off Method For Vlsi Design, David M. Deruyck, Lawrence Snyder, John D. Unruh Jan 1981

Processor Displacement: An Area-Time Trade-Off Method For Vlsi Design, David M. Deruyck, Lawrence Snyder, John D. Unruh

Department of Computer Science Technical Reports

No abstract provided.

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An Analytical Study Of Strategy-Oriented Restructuring Algorithms, Jehan-François Päris, Domenico Ferrari Jan 1981

An Analytical Study Of Strategy-Oriented Restructuring Algorithms, Jehan-François Päris, Domenico Ferrari

Department of Computer Science Technical Reports

No abstract provided.

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Improving Virtual Memory Performance By Off-Line Page Clustering, Jehan-Francois Paris Jan 1981

Improving Virtual Memory Performance By Off-Line Page Clustering, Jehan-Francois Paris

Department of Computer Science Technical Reports

No abstract provided.

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The Configurable, Highly Parallel (Chip) Approach For Signal Processing Applications, Lawrence Snyder Jan 1981

The Configurable, Highly Parallel (Chip) Approach For Signal Processing Applications, Lawrence Snyder

Department of Computer Science Technical Reports

No abstract provided.

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The Response Times Of Priority Classes Under Preemptive Resume In M/G/M Queues, A. B. Bondi, J. P. Buzen Jan 1981

The Response Times Of Priority Classes Under Preemptive Resume In M/G/M Queues, A. B. Bondi, J. P. Buzen

Department of Computer Science Technical Reports

No abstract provided.

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The Notation Of Operational Analysis, Peter J. Denning Jan 1981

The Notation Of Operational Analysis, Peter J. Denning

Department of Computer Science Technical Reports

No abstract provided.

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History And Overview Of Csnet, Peter J. Denning, Anthony Hearn, C. William Kern Jan 1981

History And Overview Of Csnet, Peter J. Denning, Anthony Hearn, C. William Kern

Department of Computer Science Technical Reports

No abstract provided.

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O++ In The Venusian Ionosphere, Jane L. Fox, G. A. Victor Jan 1981

O++ In The Venusian Ionosphere, Jane L. Fox, G. A. Victor

Physics Faculty Publications

It is shown that the revised photochemical theory for O++ in the earth's ionopshere, where double photoionization of O is the dominant source, is consistent with recent O++ measurements on Venus. A rate coefficient of 1.5 × 10−10 cm³ s−1 for O++ + O is obtained, and the possible importance of O++ chemistry on minor atomic ions and airglow emissions is explored.

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Three Counterexamples Concerning Ω-Chain Continuous Functions And Fixed-Point Properties, Joe Mashburn Jan 1981

Three Counterexamples Concerning Ω-Chain Continuous Functions And Fixed-Point Properties, Joe Mashburn

Mathematics Faculty Publications

A partially ordered set is ω-chain complete if, for every countable chain, or ω-chain, in P, the least upper bound of C, denoted by sup C, exists. Notice that C could be empty, so an ω-chain complete partially ordered set has a least element, denoted by 0.

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Effects Of N2h4 On The Transition Temperature In The Anisotropic Superconductor Tase3, K. Yamaya, T. H. Geballe, Juana Vivó Acrivos, J. Code Jan 1981

Effects Of N2h4 On The Transition Temperature In The Anisotropic Superconductor Tase3, K. Yamaya, T. H. Geballe, Juana Vivó Acrivos, J. Code

Juana Vivó Acrivos

No abstract provided.

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Mott G-Ratios In Rbx(Nh3)1-X And Oxidation State Of Rubidium Compounds From Xas, Juana Vivó Acrivos, K. Hathaway, A. Robertson, M. P. Klein, A. Thompson Jan 1981

Mott G-Ratios In Rbx(Nh3)1-X And Oxidation State Of Rubidium Compounds From Xas, Juana Vivó Acrivos, K. Hathaway, A. Robertson, M. P. Klein, A. Thompson

Juana Vivó Acrivos

The x-ray absorption spectra (XAS) of Rb metal, Rh,("JH,J, ,, 2H-NbSe2Rb111x and RbBr near the Rb K-edge have been used to ascertain that the oxidation state V of rubidium dissolved in ammonia and intt:rcalated in the layer compound is in the range 0 < V < I. Theobservededge shifts with temperature for semimctals are explainedin terms of the population of band states, and the ratio of the density states near the mobility edge over that calculated for a free electron model, i.e. the Mott ratio g, is ascertained using a semiempirical relation developed for the x-ray absorbance from Is levels to empty states ncar the mobility edge.

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Kabatiella Caulivor, Root Rot Resistance, Bluegreen Aphid, Asessment Of Medicago Murex, Clover Establishment Techniques, D J. Gillespie Jan 1981

Kabatiella Caulivor, Root Rot Resistance, Bluegreen Aphid, Asessment Of Medicago Murex, Clover Establishment Techniques, D J. Gillespie

Experimental Summaries - Plant Research

Kabatiella caulivora (clover scorch). In contrast to previous years where all overseas introductions and most crossbreds were tested for resistance to Kabatiella, only selected clovers are now being screened so as to reduce the number requiring testing to a manageable size. Root rot resistance screening. One hundred and seven clovers selected as low in formononetin, tolerant of clover scorch, mid to late season maturity, and reasonable winter vigour were tested at two sites for root rot resistance. Bluegreen aphid (BGA) resistance screening. Sub clover screening for bluegreen aphid resistance ranked from tolerant to susceptible (ratings at 49 days from commencement). …

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Software Science Revisited: A Critical Analysis Of The Theory And Its Empirical Support, V. Y. Shen, S. D. Conte, Herbert E. Dunsmore Jan 1981

Software Science Revisited: A Critical Analysis Of The Theory And Its Empirical Support, V. Y. Shen, S. D. Conte, Herbert E. Dunsmore

Department of Computer Science Technical Reports

No abstract provided.

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Conversion From Data-Flow To Synchronous Execution In Loop Programs, Janice D. Cuny, Lawrence Synder Jan 1981

Conversion From Data-Flow To Synchronous Execution In Loop Programs, Janice D. Cuny, Lawrence Synder

Department of Computer Science Technical Reports

No abstract provided.

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