Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 68221 - 68250 of 69377

Full-Text Articles in Entire DC Network

Management Of The Great Salt Lake: A Research Plan And Strategy, Craig T. Jones, Calvin G. Clyde, J. Paul Riley Jan 1976

Management Of The Great Salt Lake: A Research Plan And Strategy, Craig T. Jones, Calvin G. Clyde, J. Paul Riley

Reports

The primary purposes of this report are to indicate the following two research items in connection with the management of the water resource system of the Great Salt Lake:\ 1. Research needs and priorities. 2. A research coordination strategy. Research needs are identified by the report in terms of (1) various management, or use, categories (such as lake industries), and (2) the need to understand the physical characteristics of the lake system itself. The research needs are identified in each category as information (including data) or understanding gaps, in cases where there seems to be sufficient information, a research need …


Photoconductivity In Bone And Tendon, Robert G. Fuller, A. A. Marino, R. O. Becker Jan 1976

Photoconductivity In Bone And Tendon, Robert G. Fuller, A. A. Marino, R. O. Becker

Robert G. Fuller Publications

Ultraviolet light can be used to stimulate electrical current flow in bone and tendon. This stimulated photocurrent is directional. In tendon the photocurrent parallel to the fibrils is greater than the photocurrent perpendicular to the fibrils. In bone, the longitudinal photocurrent is less than the transverse photocurrent.


Interactive Statistical Computing For Undergraduate Liberal Arts Education, Becky Lindquist, William L. Carlson, Ralph Bjork Jan 1976

Interactive Statistical Computing For Undergraduate Liberal Arts Education, Becky Lindquist, William L. Carlson, Ralph Bjork

Journal of the Minnesota Academy of Science

St. Olaf College at Northfield, Minnesota, has an Interactive Statistical Analysis System for classroom research usage. SODAS (St. Olaf Data Analysis System) operates on a Minicomputer Time Sharing System (DEC PDP / 1140 has 15 terminals, 64K of core, and 3 disks). SODAS is used extensively by students for study of statistics, course projects, and research. In addition, it is used for faculty research . This system has increased student interest by involving them in realistic problems. In addition, student sophistication in problem solving has increased. The paper discusses the system design, the philosophy of interactive computing, and the pedagogical …


Surface Electromagnetic Waves With Damping. I. Isotropic Media, G. S. Kovener, Ralph William Alexander, Robert John Bell Jan 1976

Surface Electromagnetic Waves With Damping. I. Isotropic Media, G. S. Kovener, Ralph William Alexander, Robert John Bell

Physics Faculty Research & Creative Works

Surface-Electromagnetic-Wave Dispersion Curves Are Usually Calculated using a Simple Equation Derived from Maxwell's Equations and Boundary Conditions. When Complex Dielectric Functions Are Used for the Two Media, the Component of the Propagation Vector Along the Surface, Kx, Becomes Infinite as the Frequency Approaches the Surface Polariton Frequency Ωs If Ω is Considered Complex and Kx is Real. on the Other Hand, If Kx is Considered Complex and Ω Real, the Dispersion Curves Bend Back Toward Smaller Kx as Ω Approaches Ωs. We Have Previously Demonstrated that Both Types of Behavior Can Be Obtained from Attenuated-Total-Reflection Measurements of Silver. We Now …


Individual Residential Wastewater Treatment, Robert H. Mcneal Jan 1976

Individual Residential Wastewater Treatment, Robert H. Mcneal

Retrospective Theses and Dissertations

No abstract provided.


Interactive Pace Approach To Learning In Physics : Method And Materials, Mario Amézquita Jan 1976

Interactive Pace Approach To Learning In Physics : Method And Materials, Mario Amézquita

University of the Pacific Theses and Dissertations

This study has the following general objectives: first, to present in detail the techniques that the author has developed and used in designed the course and the final materials produced for am introductory physics course in Mechanics; second, to state and examine the important blended ingredients used to get a new strategy for teaching-learning in which and individualized pace together with a group interaction is used; third, to analyze a combination of structural and operational course where concept, structure formation, and problem solving are emphasized.


1st International Symposium On Groundwater Ecology. Introduction: Sense And Course Of The Meeting, Siegfried Husmann Jan 1976

1st International Symposium On Groundwater Ecology. Introduction: Sense And Course Of The Meeting, Siegfried Husmann

International Journal of Speleology

Short introduction on the meeting on Groundwater Ecology held at Shlitz (Germany) in 1975.


The Distribution Of The Fauna In The Interstitial Habitats Of Riverine Sediments Of The Danube And The Piesting (Austria), Dan L. Danielopol Jan 1976

The Distribution Of The Fauna In The Interstitial Habitats Of Riverine Sediments Of The Danube And The Piesting (Austria), Dan L. Danielopol

International Journal of Speleology

The interstitial fauna living in the riverine sediments of the Danube and Piesting have been investigated in Lower Austria. The nematodes, oligochaetes and cyclopoids are the most abundant groups (they represent up to 80% of the total fauna). The harpacticoids, the insect larvae, the isopods, the amphipods, the cladocera and the limnohalacarids are poorly represented (generally under 20% of the total fauna). The absence of hydrachnellids is striking. The vertical distribution of the interstitial fauna shows for several groups i.e. limnohalacarids, ostracods, isopods, harpacticoids, that the epigean species are quantitatively better represented in the upper sediment layers instead of the …


La Léthargie Chez Les Chiroptères Cavernicoles D'Afrique Centrale, Michel Anciaux De Faveaux Jan 1976

La Léthargie Chez Les Chiroptères Cavernicoles D'Afrique Centrale, Michel Anciaux De Faveaux

International Journal of Speleology

From his personal research undertaken in the subterranean field (natural and artificial cavities) in Shaba (ex-Katanga, in S.E. Zaire) and Rwanda, the author briefly defines the macroclimate of the prospected regions as well as the microclimate of the subterranean habitat (humidity and temperature). A reversible hypothermia has been noticed in the dry season only (from May till August) in eleven species of troglophile Chiroptera belonging to the following families: Rhinolophidae (7 species of Rhinolophus), Hipposideridae (only Hipposideros ruber) and Vespertilionidae (Miniopterus inflatus rufus, Miniopterus schreibersi arenarius & M.s. natalensis, Myotis tricolor). No sign of lethargy has …


H I In Early-Type Galaxies. Ii. Mass Loss And Galactic Winds, S. M. Faber, J. S. Gallagher Jan 1976

H I In Early-Type Galaxies. Ii. Mass Loss And Galactic Winds, S. M. Faber, J. S. Gallagher

Department of Physics and Astronomy: Faculty Publications

Implications of observed upper limits to the neutral hydrogen content of E and SO galaxies from Paper I are discussed. If gas shed by dying stars is completely retained by these galaxies and exists as H I, these upper limits will be exceeded in only 109 yr for E's and SO's and in only 2 x 108 yr for NGC 4472. Evidently, gas either is hidden in some undetectable form or is removed from the interstellar medium completely.


Ab Initio Investigations Of The Potential Curves Of The Ground State Of The Hydrogen Molecule And Of Several States Of The Lithium Molecule, Mark L. Olson Jan 1976

Ab Initio Investigations Of The Potential Curves Of The Ground State Of The Hydrogen Molecule And Of Several States Of The Lithium Molecule, Mark L. Olson

Graduate Dissertations and Theses

Abstract for this work is available in the additional materials.


Geology Of The Zacapa Quadrangle And Vicinity, Guatemala, Central America, David Philip Schwartz Jan 1976

Geology Of The Zacapa Quadrangle And Vicinity, Guatemala, Central America, David Philip Schwartz

Graduate Dissertations and Theses

Geologic mapping in the Zacapa quadrangle and southern Rio Hondo quadrangle has shown that the Las Ovejas Complex, of probable pre-Early Pennsylvanian age and the oldest rock south of the Motagua fault zone, is a sequence of interlayered schist, marble, amphibolite, gneiss and associated penetratively deformed diorite, tonalite and granodiorite. Metavolcanic, metavolcaniclastic, and metasedimentary rock includes original basalt, dacitic and rhyodacitic tuff, minor andesite, limestone and pelite. Emplacement of diorite coincided with regional prograde metamorphism to middle and upper amphibolite facies. Hornblende, diopside, staurolite, sillimanite, and K-feldspar formed in rock of appropriate bulk composition. In the Zacapa quadrangle, metamorphic grade …


Colorado River Basin Modeling Studies: Proceedings Of A Seminar Held At Utah State University Logan , Utah July 16-18, 1975, Calvin G. Clyde, Donna H. Falkenborg, J. Paul Riley Jan 1976

Colorado River Basin Modeling Studies: Proceedings Of A Seminar Held At Utah State University Logan , Utah July 16-18, 1975, Calvin G. Clyde, Donna H. Falkenborg, J. Paul Riley

Reports

Preface: Computer modeling is an important and valuable tool for water resources planning and management. In recent years many different modeling approaches and techniques have been developed. Some have been applied in the Colorado River Basin. A brief and incomplete search showed over fifty reports on modeling in the Colorado River Basin alone. The main motivation for this Seminar was the indication that (1) much duplication of effort is occuring among Colorado River modeling studies due to lack of information and (2) much of the knowledge now available on modeling is not being effectively applied to real problems. The overall …


Hydrologic Impact Of Burning And Grazing On A Chained Pinyon-Juniper Site In Southeastern Utah, Gerald F. Gifford, John C. Buckhouse, Frank E. Busby Jan 1976

Hydrologic Impact Of Burning And Grazing On A Chained Pinyon-Juniper Site In Southeastern Utah, Gerald F. Gifford, John C. Buckhouse, Frank E. Busby

Reports

No abstract provided.


Some Applications Of Lie Transformation Groups To Classical Hamiltonian Dynamics, Donald Robert Peterson Jan 1976

Some Applications Of Lie Transformation Groups To Classical Hamiltonian Dynamics, Donald Robert Peterson

University of the Pacific Theses and Dissertations

Recent work has established that a group theoretical viewpoint of completely integrable dynamical systems with N degrees of freedom yields an algorithm that provides new information concerning the symmetry transformation group structure of this class of dynamical systems. The work presented here rests heavily on the results presented in reference and it is recommended that the reader consult this reference for a more rigorous discussion of the results given in this thesis.


An Analysis Of Conservation Authority Decision Making As To The Acquisition And Development Of Open Space Resources, James C. Johnston Jan 1976

An Analysis Of Conservation Authority Decision Making As To The Acquisition And Development Of Open Space Resources, James C. Johnston

Theses and Dissertations (Comprehensive)

No abstract provided.


The Internal Chemical Shift - A Key To Bonding In Aromatic Molecules. 2. Substituent Effects On The Carbon-13 Magnetic Resonance Spectra Of The 1,4-Disubstituted Benzenes, Donald W. Beistel, W. Dan Edwards Jan 1976

The Internal Chemical Shift - A Key To Bonding In Aromatic Molecules. 2. Substituent Effects On The Carbon-13 Magnetic Resonance Spectra Of The 1,4-Disubstituted Benzenes, Donald W. Beistel, W. Dan Edwards

Chemistry Faculty Research & Creative Works

Carbon-13 magnetic resonance shifts were determined for six families of 1,4-disubstituted benzenes. Linear least-squares correlations between the internal shifts of the families suggest an additivity relationship for 13C substituent effects at all four nonidentical ring carbons and at the α position when one of the substituents has a central carbon. The correlation of 1H and 13C shifts for these compounds is also linear, implying that the additivity relationships derived in a previous 1H study can be generalized to 13C.


Part I. Thermodynamic Acidities Of Substituted Phenylacetylenes. Part Ii. Mercury Accumulation In Trout Of Southern Missouri, Eric T. Lloyd Jan 1976

Part I. Thermodynamic Acidities Of Substituted Phenylacetylenes. Part Ii. Mercury Accumulation In Trout Of Southern Missouri, Eric T. Lloyd

Masters Theses

"PART I: THERMODYNAMIC ACIDITIES OF SUBSTITUTED PHENYLACETYLENES The thermodynamic acidities (pKa) of phenylacetylene and several para substituted phenylacetylenes in methanol were determined at 25ºC. These acidity constants were determined using a quenching technique which involves converting the phenylacetylenic anion, present at equilibrium as sodium phenylacetylide, to the tritium labelled carbon acid. By liquid scintillation counting techniques, the concentration of the anion was determined and the pKa of the phenylacetylene compound calculated. The resulting pKa's are: p-nitrophenylacetylene, 17.98, p-bromophenylacetylene, 18.10, p-fluorophenylacetylene, 18.14, phenylacetylene, 18.50, and p-methylphenylacetylene, 18.60. The effect of a substituent in the para position on the relative acidities is …


Geology Of The Western Portion Of The Dogtooth Pluton, Lake Of The Woods Region, Southwestern Ontario, Richard H. Pilatzke Jan 1976

Geology Of The Western Portion Of The Dogtooth Pluton, Lake Of The Woods Region, Southwestern Ontario, Richard H. Pilatzke

Theses and Dissertations

A 10 km2 portion of a subsolvus, syntectonic or posttectonic grano dioritic intrusion located about 16 km east of Kenora, Ontario was extensively sampled for study by petrographic modal analysis and trend surface analysis. The Dogtooth pluton, the main intrusive body sampled, is part of a granitic batholith known as the Dryberry dome, which is interpreted to have been intruded into supracrustal volcanic and sedi mentary rocks about 2480 million years ago during the Kenoran Orogeny. The Longbow pluton, which was also sampled, occurs at the west margin of the Dryberry dome in contact with the supracrustal rocks to the …


The Karst Of Transvaal (South Africa), J. Martini, I. Kavalieris Jan 1976

The Karst Of Transvaal (South Africa), J. Martini, I. Kavalieris

International Journal of Speleology

The Transvaal Karst is a world important example of a Karst developed on a very old dolomite. Its unique character is due to the composition of the rock and history of development. The dissolution of the dolomite is interesting and has an important effect on the character of the caves developed. The caves preserved in this area include the longest known in South Africa and are perhaps among the largest dolomite systems known in the world. They are very old and in some cases contain important palaeontological deposits (Australopithecine fauna). The caves to various degrees are in a state of …


Video Tape : An Old-New Instructional Aid In The Physics Laboratory, Fanny Mercedes Torres Holguin Jan 1976

Video Tape : An Old-New Instructional Aid In The Physics Laboratory, Fanny Mercedes Torres Holguin

University of the Pacific Theses and Dissertations

My objective is to use the video-tape as another medium -- along with overhead projector, textbooks, guides of apprenticeship, pictures, lab equipment and suggestions from the programs and new trends in physics teaching -- being used to supplement our efforts in trying to reach more and more of our students The use of audiovisual media, and generally speaking the use of technology in education, can be constructive or destructive, can e very powerful in developing "human beings" or "robots", can increase the rate of apprenticeship, or can produce an educational catastrophe. However, it will heavily depend on the the professor, …


Glacial Deposits, Vol. 4, 1975-1976, Department Of Geography-Geology Jan 1976

Glacial Deposits, Vol. 4, 1975-1976, Department Of Geography-Geology

Glacial Deposits

Newsletter of the Department of Geography-Geology


Qsim2: A Low-Budget Heuristic Approach To Modeling And Forecasting, Wayne Wakeland Jan 1976

Qsim2: A Low-Budget Heuristic Approach To Modeling And Forecasting, Wayne Wakeland

Complex Systems Faculty Publications and Presentations

This paper contains a description of a simple mathematical framework and modeling process which can be used to study a large class of socio-techno-natural systems. Models may be designed using intuitive notions or data to help specify the variables, parameters and interrelationships, which, with the aid of a computer program, can be used to forecast system behavior under various assumptions. Two example models are described.


Global Bifurcation Theorems For Nonlinearly Perturbed Operator Equations, John Macbain Jan 1976

Global Bifurcation Theorems For Nonlinearly Perturbed Operator Equations, John Macbain

Faculty Publications

No abstract provided.


Geophysical Institute Annual Report 1975-76, Geophysical Institute Jan 1976

Geophysical Institute Annual Report 1975-76, Geophysical Institute

GI Reports

The 1975-76 Geophysical Institute Annual Report presents an overview of the year’s scientific research achievements across the Institute’s disciplines, alongside operational summaries covering finances, administrative changes, and other key activities.


Trace Fossils Of The Brassfield Formation, Lower Silurian, In South-Central Ohio And North Central Kentucky, Eugene J. Murray Dec 1975

Trace Fossils Of The Brassfield Formation, Lower Silurian, In South-Central Ohio And North Central Kentucky, Eugene J. Murray

Masters Theses

No abstract provided.


Radiative Lifetime Of The B ²Σˉ State Of Ch, Richard A. Anderson, Jerry Peacher, David M. Wilcox Dec 1975

Radiative Lifetime Of The B ²Σˉ State Of Ch, Richard A. Anderson, Jerry Peacher, David M. Wilcox

Physics Faculty Research & Creative Works

The radiative lifetimes of the N'=3 to 15 rotational states of the v'=0 level of the B 2Σ- state of CH were measured. Emission lines were observed to N'=15, but no lines above this rotational state were observed. This result agrees with previous studies. The lifetimes of all rotational states were between 300 and 400 ns. Previous measurements have indicated that the N'=15 level might have a lifetime as short as 100 ns.


High-Frequency Dielectric Measurements On Electro-Optic Single Crystals, J. R. Teague, R. R. Rice, Robert Gerson Dec 1975

High-Frequency Dielectric Measurements On Electro-Optic Single Crystals, J. R. Teague, R. R. Rice, Robert Gerson

Physics Faculty Research & Creative Works

A slotted line was used to measure the high-frequency dielectric constant and loss tangent of several electro-optic crystals useful for wide-band laser modulator applications. Dielectric measurements were made at 0.1, 0.3, 1.0, and 2.0 GHz.


Use Of Optical Character Recognition In The Invoice Processing System Of The Michigan Medicaid Program, Richard F. Burns Dec 1975

Use Of Optical Character Recognition In The Invoice Processing System Of The Michigan Medicaid Program, Richard F. Burns

Masters Theses

No abstract provided.


Using A Programmable Calculator To Introduce Fundamental Concepts Of Assembly Language Programming, H. D. Schwetman Dec 1975

Using A Programmable Calculator To Introduce Fundamental Concepts Of Assembly Language Programming, H. D. Schwetman

Department of Computer Science Technical Reports

No abstract provided.