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 68341 - 68370 of 69380

Full-Text Articles in Entire DC Network

Tertiary Welded Tuffs Of The Ryan Spring Area, Needle Range, Beaver County, Utah, Peter Carlyle Rauch Jan 1975

Tertiary Welded Tuffs Of The Ryan Spring Area, Needle Range, Beaver County, Utah, Peter Carlyle Rauch

Masters Theses

"The Needle Range of southwestern Utah is composed of Paleozoic sediments overlain by a thick sequence of Tertiary volcanic rocks primarily of the welded tuff class. The area has undergone at least four stages of post-eruptive structural deformation. The most significant stage is that which formed the range by normal Basin and Range type faulting. The faults strike northwest and tilt the volcanic layers northeast.

The volcanic section is composed primarily of the Needles Range Formation (Oligocene) overlain by the Isom Formation and underlain by several flows and ash flows, one of which has been tentatively correlated to the Escalante …


A Study Of Middle To Late Quaternary Sediments In The Karst Trap., David Lewis Rath Jan 1975

A Study Of Middle To Late Quaternary Sediments In The Karst Trap., David Lewis Rath

Masters Theses

"Quaternary deposits preserved in a karst trap on the Lebanon uplands a e described. The sediments represent the Yarmouthian, Illinoian, Sangamonian, and Wisconsinan Stages. The karst trap is pre-Yarmouthian in age. The lowermost deposit consists of residual fill material on which lies a well-developed Yarmouth paleosol. During the Illinoian Stage about 61 cm (2 feet) of Loveland loess was deposited over the area. Toward late Illinoian conditions favoring erosion rapidly filled the closed system, stripping the loess and reducing the residual slopes. The system stabilized during the Sangamonian Stage allowing for a thick, strong Sangamon paleosol to deve lop on …


Electron Impact Autoionization In Heavy Alkali Metals, Kaare J. Nygaard Jan 1975

Electron Impact Autoionization In Heavy Alkali Metals, Kaare J. Nygaard

Physics Faculty Research & Creative Works

Autoionizing levels in cesium, rubidium, and potassium have been studied by electron impact in a crossed-beam apparatus. Comparisons are made with the binary-encounter calculations of Roy and Rai. The effects of autoionization and inner-shell ionization have been overestimated in the theory. © 1975 The American Physical Society.


Quaternary Geology Of The Southern Part Of The Grand Forks And Bemidji Quadrangles, Donald K. Sackreiter Jan 1975

Quaternary Geology Of The Southern Part Of The Grand Forks And Bemidji Quadrangles, Donald K. Sackreiter

Theses and Dissertations

Northwestern Minnesota is an area at the southwestern edge of the Canadian Shield that is mantled by thick Pleistocene sediment. The Pleistocene material included a variety of glacial, shoreline, offshore, fluvial, and eolian sediment.

The lithology of the glacial sediment reflects the rock and sediment over which the depositing glacier flowed. Glaciers that advanced from the northeast (Canadian Shield) deposited sandy, granitic-rich material. Glaciers that advanced from the north· (Manitoba Lowland) deposited loamy, calcareous-rich material. Glaciers that advanced from the northwest (eastern North Dakota and southwestern Manitobal deposited clayey, shale-ridt material. A variety of fluvial and lacustrine sediments are typically …


Geology Of The North Beulah, Center, And Glenharold Lignite Mines In Mercer And Oliver Counties, Southwestern North Dakota, Roy E. Kulland Jan 1975

Geology Of The North Beulah, Center, And Glenharold Lignite Mines In Mercer And Oliver Counties, Southwestern North Dakota, Roy E. Kulland

Theses and Dissertations

The geology of the North Beulah, Center, and Glenharold lignite mines in Mercer and Oliver Counties, southwestern North Dakota, were examined. Stratigraphically, all mines lie within the Sentinel Butte Formation. The North Beulah Mine lies 70 m below the top of the Sentinel Butte Formation and the Center and Glenharold Mines lie about 80 m above the base of the Tongue River Formation.

Four sedimentary types are recognized arid common to all mines; these are: silt and clay, silty sand, sand, and lignite. The silt and clay were deposited in floodbasins and shallow lakes occupying the lowest parts of the …


Petrography Of Precambrian Iron Formation, Pembina County, North Dakota, Ronald E. Richardson Jan 1975

Petrography Of Precambrian Iron Formation, Pembina County, North Dakota, Ronald E. Richardson

Theses and Dissertations

In October of 1964 the Topographic Branch of the United States Geological Survey reported difficulties in using magnetic compasses while mapping in the areas of Akra and Hensel, Pembina County, North Dakota. University of North Dakota geologists located anomalies of 67,500 gammas 1.6 lon east of Akra and 71,500 gammas 4 km east of Hensel, the normal magnetic field in this area being about 60,000 gammas. The rock bodies producing the magnetic anomalies were drilled and examination of diamond drill core showed them to consist of oxide and silicate facies iron formation interlayered with quartz-biotite schist of Precambrian age. The …


Symposium On Life Histories Of Cave Beetles: An Introduction, Thomas L. Poulson Jan 1975

Symposium On Life Histories Of Cave Beetles: An Introduction, Thomas L. Poulson

International Journal of Speleology

Overview of the six papers presented at the Symposium on Life Histories of Cave Beetles held at the 1973 annual convention of the National Speleological Society at Bloomington in Indiana (USA).


Seasonal Changes In A Population Of Pseudanopthalmus Tenuis (Coleoptera, Carabidae) In Murray Spring Cave, Indiana: A Preliminary Report, James H. Keith Jan 1975

Seasonal Changes In A Population Of Pseudanopthalmus Tenuis (Coleoptera, Carabidae) In Murray Spring Cave, Indiana: A Preliminary Report, James H. Keith

International Journal of Speleology

A study of a population of Pseudanophthalmus tenuis is being conducted in Murray Spring Cave, Orange County, Indiana as one facet of a larger research project encompassing the entire terrestrial community of that cave. Changes in behaviour and abundance determined by census and mark-recapture methods and physiological changes determined from field-collected beetles indicates that these animals exhibit a seasonal reproductive rhythm probably mediated or controlled by winter and spring flooding of the cave.


Chronologie Du Développement Et Évolution Du Stockage De Calcium Et Des Cellules À Urates Chez Niphargus Schellenbergi Karaman, François Graf, Philippe Michaut Jan 1975

Chronologie Du Développement Et Évolution Du Stockage De Calcium Et Des Cellules À Urates Chez Niphargus Schellenbergi Karaman, François Graf, Philippe Michaut

International Journal of Speleology

The intra-marsupial development of Niphargus schellenbergi is divided into three phases: within the chorion, embryonic intermoult and juvenile intermoult. The disappearance of the chorion divides the first phase from the second. A double exuviation exists between the last two. The chronology of the embryonic development and of the beginning of post-embryonic development is established. On hatching the juvenile N. schellenbergi has one pair of hepatopancreatic caeca. During the first post-embryonic intermoults the ventral hepatopancreatic caeca, posterior caeca and anterior caecum are formed. The relation between posterior caeca and the aorta is described. The study of calcium storage before moulting showed …


Population Ecology, Desiccation, And Food Resources With Respect To Angle Of Substrate For Two Limpets, Collisella (Acmaea) Digitalis And Collisella (Acmaea) Scabra, Linda Susan Collins Jan 1975

Population Ecology, Desiccation, And Food Resources With Respect To Angle Of Substrate For Two Limpets, Collisella (Acmaea) Digitalis And Collisella (Acmaea) Scabra, Linda Susan Collins

University of the Pacific Theses and Dissertations

Two common limpets, Collis~ (Acmaea) digitalis and Collisella (Acmaea) scabra have overlapping distributions in the upper int.ertidal .spray zone. Haven (1971) found that Q. digitalis is more abundant on vertical surfaces while Q. scabra dominates horizontal surfaces. He assumed this preference to be due to differential abilities to withstand desiccation. In this study I report field work demonstrating a high correlation between the-ratio of abundance of Q. digitalis/ Q. scabra and angle of slope of substrate. Length (mm) of Q. scabra declines linearly with angle, but Q. digitalis shows no such trends. Results of laboratory measurements of angle of substrate …


Glacial Deposits, Vol. 3, 1974-1975, Department Of Geography-Geology Jan 1975

Glacial Deposits, Vol. 3, 1974-1975, Department Of Geography-Geology

Glacial Deposits

Newsletter of the Department of Geography-Geology


The Computation Of Eigenvalues And Eigenvectors Of An Nxn Real General Matrix, Yeh-Hao Ma Jan 1975

The Computation Of Eigenvalues And Eigenvectors Of An Nxn Real General Matrix, Yeh-Hao Ma

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The eigenvalues of the matrix eigenproblem Ax = λx are computed by the QR double-step method and the eigenvectors by inverse power method.

The matrix A is preliminarily scaled by the equilibration and normalization procedure. The scaled matrix is then reduced to an upper-Hessenberg form by Householder's method. The QR double-step iteration is performed on the upper-Hessenberg matrix. After all the eigenvalues are found, the inverse power method is performed on the upper-Hessenberg matrix to obtain the corresponding eigenvectors.

The program consists of five subroutines which is able to find real and/or complex eigen value/vector of an nxn real matrix.


Petrology And Geochemistry Of The Killdeer Carbonates, John J. Delimata Jan 1975

Petrology And Geochemistry Of The Killdeer Carbonates, John J. Delimata

Theses and Dissertations

The strata of the proposed Killdeer Formation (Stone, W. J., 1972) in the Killdeer Mountains of Dunn County, North Dakota is composed of a sequence of tuffaceous, calcareous, dolomitized and silicified flat lying sedimentary rocks of Tertiary age. It is the purpose of this report to describe and integrate the petrology and geochemistry of these sediments.

Fieldwork was conducted during the summer of 1972. Forty-three stratigraphic sections were measured and representative samples of each were collected for further analysis. Seven section were selected as representative of the area, and samples from these were studied in thin section with the petrographic …


The Keller Plan In College Introductory Physical Geology : A Comparison With The Conventional Teaching Method, Robert G. Walsh Sr. Jan 1975

The Keller Plan In College Introductory Physical Geology : A Comparison With The Conventional Teaching Method, Robert G. Walsh Sr.

Theses and Dissertations

The purpose of this study is to compare the learning and attitudinal changes that took place in a college introductory physical geology class between a self-paced method of instruction called the Keller Plan and the conventional lecture-laboratory method.

The sample population was 56 students enrolled in Earth Science 120, an introductory physical geology course at Minot State College ·~ during the fall quarter, 1973. An experimental section of 20 students experienced the Keller Plan treatment and two control groups consisting of 18 students each received the conventional method of instruction.

Four specific areas of investigation were tested: (1) knowledge of …


Surface Electromagnetic Waves On Layered Systems With Damping, C. A. Ward, Ralph William Alexander, Robert John Bell Jan 1975

Surface Electromagnetic Waves On Layered Systems With Damping, C. A. Ward, Ralph William Alexander, Robert John Bell

Physics Faculty Research & Creative Works

The Dispersion Curves, Propagation Distances, and Poynting Vectors of Surface Electromagnetic Waves Propagating on a System of Cu-Cu2O-Air with Variable Film Thickness Have Been Calculated using the Full Dispersion Realation Including Damping. Double-Dip Structure in the Propagation Distance for Intermediately Thick overlayers, the Shifting of One Dip Below ΣTO, and the Presence of the Other Dip at ΣLO Are Explained in Terms of Features of the Dispersion Curve. the Complete Poynting-Vector Calculations Show that Predictions of Field Bunching at ΣLO Are Probably in Error. © 1975 the American Physical Society.


Geophysical Institute Annual Report 1974-75, Geophysical Institute Jan 1975

Geophysical Institute Annual Report 1974-75, Geophysical Institute

GI Reports

The 1974-75 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.


Ua66/7/2 Newsletter, Wku Chemistry Dec 1974

Ua66/7/2 Newsletter, Wku Chemistry

WKU Administration Documents

Newsletter created by and about the WKU Chemistry department.


Mössbauer Properties Of Synthetic Analogs Of Active Sites Of The Iron-Sulfur Proteins, Richard B. Frankel, B. A. Averill, R. H. Holm Dec 1974

Mössbauer Properties Of Synthetic Analogs Of Active Sites Of The Iron-Sulfur Proteins, Richard B. Frankel, B. A. Averill, R. H. Holm

Physics

Mössbauer spectroscopy of the synthetic tetramers [Fe4S4(SR)4]2- (R = alkyl, aryl) and the corresponding trianions obtained by one-electron reduction, when compared with available data for 4-Fe and 8-Fe iron-sulfur proteins, shows that these tetramers are electronic analogs of the active sites of the proteins.


Syntheses And Characterizations Of Vanadyl (Iv) Complexes With Dihydroxydicarboxylate Ligands, Sharon K. Hahs Dec 1974

Syntheses And Characterizations Of Vanadyl (Iv) Complexes With Dihydroxydicarboxylate Ligands, Sharon K. Hahs

Chemistry and Chemical Biology ETDs

Binuclear complexes of the vanadyl(IV) tartrates have already been shown to exist both in the solid state and in solution. These complexes consist of two vanadyl(IV) ions bridged by two tartrato(4-) ligands, either of the same--DD (or LL)-- or opposite--DL--enantiomeric configuration. (The meso isomer of tartaric acid will not form binuclear complexes with vanadyl(IV).) The DL complex is more stable than the DD complex due to a greater degree of staggering between the vicinal hydrogen atoms on each tartrate chain. Investigations of vanadyl(IV) complexes with substituted tartaric acid ligands--specifically, (±)-dimethyltartaric acid and (±)-threomethyltartaric acid--have been undertaken to determine whether this …


Science Foundations: A Science Program For The Non-Science Student. Technical Report No. 4., James Shymansky Dec 1974

Science Foundations: A Science Program For The Non-Science Student. Technical Report No. 4., James Shymansky

Educator Preparation & Leadership Faculty Works

No abstract provided.


Geology Of Klump's Cave, Perry County, Missouri, Ernest L. Kern Dec 1974

Geology Of Klump's Cave, Perry County, Missouri, Ernest L. Kern

Masters Theses

No abstract provided.


Models For Estimating Psychiatric Bed Needs, Patricia A. Brenneman Dec 1974

Models For Estimating Psychiatric Bed Needs, Patricia A. Brenneman

Loma Linda University Electronic Theses, Dissertations & Projects

Inland Counties Comprehensive Health Planning Council wished to estimate the psychiatric bed needs by type (such as state hospitals, board and care homes, etc.) in San Bernardino County from the distributions of patient arrivals and of lengths of stay. A statistical description of the system during 1973 was considered the first step toward estimating future bed needs. A computer simulation model using IBM's programming language General Purpose Simulation System (GPSS) was developed and was found to be unsatisfactory.

Theorems were then developed for a statistical model, seeking to predict future bed needs. The most convenient of these theorems states that …


Oer For Mixed Neutrons And Γ Rays, Robert Katz, S. C. Sharma Nov 1974

Oer For Mixed Neutrons And Γ Rays, Robert Katz, S. C. Sharma

Robert Katz Publications

A formula for the OER in a mixed field of neutrons and gamma rays (Hall, 1972a; 1972b) is given .... Our results, calculated from track structure theory (Katz and Sharma, 1973) and secondary particle-energy spectra in tissue from these neutrons (Caswell and Coyne, 1973; Dennis, 1972) are within 5 per cent of the values of Omix found from the Hall formula, when that formula is supplied with calculated values of Rn, On, and Oγ, at appropriate survival levels. Our calculations suggest that the Hall formula may be used with confidence for neutrons of …


Statistical Modelling Of Computer Systems: A Review, Amrit L. Goel, Anand M. Joglekar Sep 1974

Statistical Modelling Of Computer Systems: A Review, Amrit L. Goel, Anand M. Joglekar

Electrical Engineering and Computer Science - Technical Reports

This paper briefly reviews the data dependent statistical methods useful for computer systems modelling. The techniques are classified according to their applicability toward comparison, tuning and design of computer systems. A review of publications dealing with statistical modeling of computer systems is presented and a comprehensive bibliography is included to provide a useful source of reference toward the present and potential applications of statistical methods for computer system modelling.


Measurable Choice And The Invariant Subspace Problem, Edward Azoff, Frank Gilfeather Sep 1974

Measurable Choice And The Invariant Subspace Problem, Edward Azoff, Frank Gilfeather

Department of Mathematics: Faculty Publications

In [1], J. Dyer, A. Pedersen and P. Porcelli announced that an affirmative answer to the invariant subspace problem would imply that every reductive operator is normal. Their argument, outlined in [1], provides a striking application of direct integral theory. Moreover, this method leads to a general decomposition theory for reductive algebras which in turn illuminates the close relationship between the transitive and reductive algebra problems.
The main purpose of the present note is to provide a short proof of the technical portion of [1] : that invariant subspaces for the direct integrands of a decomposable operator can be assembled …


Concerns Of Postnatal Mothers About Sexuality, Sheela A. Gideon Sep 1974

Concerns Of Postnatal Mothers About Sexuality, Sheela A. Gideon

Loma Linda University Electronic Theses, Dissertations & Projects

An exploratory study was designed to find out what questions mothers had about postnatal sexuality. A questionnaire was prepared by the nurse researcher to find out answers to the following questions.

  1. What specific questions do mothers have about sexual relations following delivery?
  2. Do mothers feel free to initiate discussion about resumption of intercourse following delivery?
  3. Do mothers like their husbands to be included in the discussion?
  4. When do mothers prefer to receive information regarding sexual relationships following delivery?

The questionnaire was mailed to fifty primipara mothers between three and four weeks after delivery. Mothers with pronounced anemia, heart and lung …


Exploration Of The Incidence Of Identified Emotional Disorders In Selected General Hospitals Of Nebraska, Arlene M. Van Horn Sep 1974

Exploration Of The Incidence Of Identified Emotional Disorders In Selected General Hospitals Of Nebraska, Arlene M. Van Horn

Loma Linda University Electronic Theses, Dissertations & Projects

A descriptive-comparative survey using content analysis of medical records has been done to determine the frequency with which emotional disorders are identified by medical personnel in the population hospitalized in small general hospitals in north-central Nebraska.

A systematic, random sample of medical records was taken from two hospitals arbitrarily included in the study on the basis of bed capacity and distance from mental health facilities.

Each medical record that was reviewed has been placed in a category based on whether an emotional disorder was identified in it by the medical personnel, or whether it contained recorded behaviors that could indicate …


Prenatal Instruction Of Breast Feeding Mothers, Anita Berry Sep 1974

Prenatal Instruction Of Breast Feeding Mothers, Anita Berry

Loma Linda University Electronic Theses, Dissertations & Projects

This experimental study tested the effect of prenatal instruction on the success of a group of mothers who desired to breast feed their infants. It was hypothesized that mothers receiving information on how to nurse their infants, how to prevent complications and how to cope with common problems of breast feeding would have a higher success rate than those not so instructed.

Criteria for success was that the mothers would have an adequate supply of milk to meet the nutritional demands of their infant without supplementation, would have fewer and less severe complications, and would express a higher degree of …


A Non-Procedural High-Level Language For Automated Design Of Application Systems, J. F. Nunamaker Sep 1974

A Non-Procedural High-Level Language For Automated Design Of Application Systems, J. F. Nunamaker

Department of Computer Science Technical Reports

No abstract provided.


The Effects Of Pentachlorophenol On The Electrical Conductivity Of Lipid Bilayer Membranes, William Harvey Perman Aug 1974

The Effects Of Pentachlorophenol On The Electrical Conductivity Of Lipid Bilayer Membranes, William Harvey Perman

Dissertations and Theses

The effects of pentachlorophenol (PCP), a widely used pesticide, on the electrical characteristics of lipid bilayer membranes has been studied. When a small amount of PCP (even at a concentration of a few micromoles per liter) is present in the electrolytic solution surrounding the membrane, the electrical conductivity of the membrane significantly increases. The present work was concerned with detailed measurements of the changes in the conductivity caused by PCP under chemically controlled conditions. The experimental results were analyzed to determine the permanent species in the membrane, and an attempt was made to correlate the data with existing models of …