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1972

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Articles 1 - 30 of 676

Full-Text Articles in Physical Sciences and Mathematics

Investigation Of Present Thermal Regime Of Missouri River In Missouri, James C. Maxwell Dec 1972

Investigation Of Present Thermal Regime Of Missouri River In Missouri, James C. Maxwell

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The applicability of power spectral density techniques, Fourier series analysis, and linear regression to the mathematical modeling of river water temperature is demonstrated. Consideration is also given to the problem of estimating thermal inputs to rivers from man-made sources such as electrical power plants. First, power spectral density techniques are used in the time-series analysis of water temperature records which were taken from the Missouri River. Two spectral ranges are then studied from the standpoint of their applicability to (1) mathematical model building and (2) detection and identification of cyclic thermal inputs. Next, a Fourier regression fit to the time-series ...


Electron Transmission Spectroscopy In Atomic Hydrogen, L. Sanche, Paul Burrow Dec 1972

Electron Transmission Spectroscopy In Atomic Hydrogen, L. Sanche, Paul Burrow

Paul Burrow Publications

An electron transmission experiment is used to study the resonances in the total scattering cross section of atomic hydrogen below the threshold of the first excited state. The three lowest resonances, designated 1S, 3P, and 1D, are observed and their energies and decay widths are found to be in good agreement with the values predicted theoretically using close coupling with correlation.


Ua66/7/2 Newsletter, Wku Chemistry Dec 1972

Ua66/7/2 Newsletter, Wku Chemistry

WKU Archives Records

Newsletter created by and about the WKU Chemistry department.


Water Resources News, Volume 4, No. 10, December 1972 Dec 1972

Water Resources News, Volume 4, No. 10, December 1972

Water Current Newsletter

Spring Water Resources Seminar - 1973
Summer Institutes Announced at the University of Nebraska
Nebraska Federal Sewage Funds Cut
Future Cloud-Seeding Experiments
GAO vs EPA
World's First
Guidelines for Planning Projects Available
BUREC Report Notes Shift in Water Usage
Hall Appointed Acting Director of OWRR
Water Resources Council Releases "Summary/Analysis"
Waste Storage Underground
National Resource and Land Information Program Urged


Impact Of P.L. 480 Aid On India's Money Supply And External Debt-Service Obligations: A Look Ahead, Center For Agricultural And Economic Development, Iowa State University, Uma K. Srivastava Dec 1972

Impact Of P.L. 480 Aid On India's Money Supply And External Debt-Service Obligations: A Look Ahead, Center For Agricultural And Economic Development, Iowa State University, Uma K. Srivastava

CARD Reports

Inflation has been a major factor affecting the rate of development in most if not all countries of the world. It increases uncertainty of investment and affects the welfare of all citizens, especially those in the lower income strata. Thus, the possibility that inflation may result from shipments of food to nations under a program established partially to improve the welfare of low income people and encourage economic development raises serious questions. Since it is of such a serious nature, economic analysis is required (1) to define the economic relationships involved in food aid shipments to allow a clear understanding ...


Nonnegative Matrices Whose Inverses Are M-Matrices, Thomas L. Markham Dec 1972

Nonnegative Matrices Whose Inverses Are M-Matrices, Thomas L. Markham

Faculty Publications

A characterization of a class of totally nonnegative matrices whose inverses are M-matrices is given. It is then shown that if A is nonnegative of order n and A^-1 is an M-matrix, then the almost principal minors of A of all orders are nonnegative.


Groundwater - Surface Water Integration Study In The Grand Prairie Of Arkansas, Carl L. Griffis Dec 1972

Groundwater - Surface Water Integration Study In The Grand Prairie Of Arkansas, Carl L. Griffis

Technical Reports

A mathematical model of the Quaternary Aquifer of the Grand Prairie, Arkansas was developed and used to evaluate a variety of methods of artificially recharging this aquifer. In addition, the model was used to evaluate the impact of various levels of water management and the probable movement of artificially recharged water in the aquifer. Improved water management and the use of recharge wells were the two alternatives that showed the most promise as potential solutions. The rate of movement of recharged water was determined by the model to be 300 ft./year under a gradient of 16 ft./mile.


Characterization Of Water Movement Into And Through Soils During And Immediately After Rainstorms, C. T. Haan Dec 1972

Characterization Of Water Movement Into And Through Soils During And Immediately After Rainstorms, C. T. Haan

KWRRI Research Reports

The movement of water into and through soils in the unsaturated state is basic to many water resources problems including rainfall-runoff models, ground water recharge, irrigation, drainage, evapotranspiration and the movement of pollutants in soils. This study was conducted in an effort to determine if the flow equation based on Darcy's Law and the continuity equation could be used to describe watershed infiltration and thus be incorporated into hydrologic models.

The results of the study indicate that even on apparently uniform soils there is a great deal of variability in soil water properties. Handling this variability plus the difficulty ...


Stochastic Integro-Differential Equations Of Volterra Type, William J. Padgett, Chris P. Tsokos Dec 1972

Stochastic Integro-Differential Equations Of Volterra Type, William J. Padgett, Chris P. Tsokos

Faculty Publications

No abstract provided.


The Structural And Metamorphic History Of The Oakhurst Roof Pendant, Mariposa And Madera Counties, California, Lee R. Russell Dec 1972

The Structural And Metamorphic History Of The Oakhurst Roof Pendant, Mariposa And Madera Counties, California, Lee R. Russell

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Oakhurst roof pendant, near Oakhurst, California, consists of three pre-Cretaceous clastic metasedimentary rock units, surrounded and intruded by rocks of the Sierra Nevada batholith. Two zones of probable "sheared granitic" and "ultramafic" rocks trend northwesterly and are approximately aligned with the Foothills fault system farther north.

The dominant mesocopic feature of the pendant is a northwesterly striking foliation which forms a downward converging fan. Earlier-formed hornblende lineations have been transposed into this foliation plane, as shown by Schmidt-net projections.

Rocks comprising the three unites show three textural stages:

1) Early amphiboles and diopside overgrown by later static amphibole pophyroblasts ...


Epeirogenic And Climatic Controls Of Early Pleistocene Fluvial Sediment Dispersal In Nebraska, K. O. Stanley, William J. Wayne Dec 1972

Epeirogenic And Climatic Controls Of Early Pleistocene Fluvial Sediment Dispersal In Nebraska, K. O. Stanley, William J. Wayne

Papers in the Earth and Atmospheric Sciences

The change from Pliocene to Pleistocene fluvial sedimentation in Nebraska is denoted by gravel with relative enrichment of mechanically weak rock species and a two-fold increase in largest clast size. These changes in fluvial sediments suggest modification in degradational energy affecting detritus apparently related to deterioration of climate in the early Pleistocene. Cooler Pleistocene climates with increased moisture resulted in greater discharge and carrying capacity for streams headed in the Rocky Mountains and flowing across Nebraska. These streams carried granitic detritus eastward toward the continental glacier margin in easternmost Nebraska. There, streams flowing off ice sheets carrying sedimentary and metamorphic ...


The Design And Construction Of An Electron Lens For Use In A Low Energy Electron Diffraction System, Rodney S. Krieger Dec 1972

The Design And Construction Of An Electron Lens For Use In A Low Energy Electron Diffraction System, Rodney S. Krieger

Masters Theses

No abstract provided.


The Analysis Of Three Narrow Resonances Observed In Protons On Oxygen-16, Benjamin Y. J. Tan Dec 1972

The Analysis Of Three Narrow Resonances Observed In Protons On Oxygen-16, Benjamin Y. J. Tan

Masters Theses

No abstract provided.


Distribution Of Mass And Charge In The Spontaneous Fission Of ²⁴⁴Cm, K. F. Flynn, B. Srinivasan, Oliver Manuel, Lawrence Elgin Glendenin Dec 1972

Distribution Of Mass And Charge In The Spontaneous Fission Of ²⁴⁴Cm, K. F. Flynn, B. Srinivasan, Oliver Manuel, Lawrence Elgin Glendenin

Chemistry Faculty Research & Creative Works

The distribution of mass and charge in the spontaneous fission of 244Cm has been investigated by radiochemical and mass spectrometric determination of the fission yields for 40 mass chains and 2 shielded nuclides (independent yields). The mass distribution is highly asymmetric with a relative probability of asymmetric-to-symmetric fission (peak-to-valley ratio) of greater than 5700. The average masses of the light and heavy groups are 103.1 and 138.7, respectively. The characteristics of the mass distribution, as well as the division of nuclear charge indicated by the independent yields of the two shielded nuclides, are consistent with the systematics ...


The Effect Of Stereoelectronic Control And Long Range Interaction On The Stability Of Bicyclic Enolate Anions, Edwin M. Van Dam Dec 1972

The Effect Of Stereoelectronic Control And Long Range Interaction On The Stability Of Bicyclic Enolate Anions, Edwin M. Van Dam

Dissertations

No abstract provided.


On Improved Wkb (Uniform Asymptotic) Quantum Conditions, Dunham Corrections, The Langer Modification, And Rkr Potentials, Russell T. Pack Dec 1972

On Improved Wkb (Uniform Asymptotic) Quantum Conditions, Dunham Corrections, The Langer Modification, And Rkr Potentials, Russell T. Pack

Faculty Publications

An improvement to the WKB quantum condition for the rotation-vibration levels of diatomic molecules, known empirically to give RKR potentials of increased accuracy and to account for the Dunham correction Y00, is derived using uniform asymptotic methods. The role of the Langer transformation in this problem is also discussed.


Water Resources News, Volume 4, No. 9, November 1972 Nov 1972

Water Resources News, Volume 4, No. 9, November 1972

Water Current Newsletter

Conference Proceedings Available
Assistance Grants for Nebraska
Niobrara, Nebraska - Moving
Congress Heaps CEQ Report
Bureau Studies Saline Water
New Administrative Regions for USGS
Unfair Attacks on Pesticide Pollution
Numerical Designation of Bureau Regional Offices Obsolete
Water Pollution Control Measure Becomes Law
Gavins Point Dam
Water Dollars Down the Drain
Federal Pollution Laws
New Food Industry Uses Heated Water
War Between the Worlds
Waste Discharge Exceptions Banned
National Water Commission Report


A Five Sector Model Of Agricultural Development, Industrialization And Food Aid In A Dual Economy, Center For Agricultural And Economic Development, Iowa State University, Walter W. Haessel, Earl O. Heady, Leo V. Mayer Nov 1972

A Five Sector Model Of Agricultural Development, Industrialization And Food Aid In A Dual Economy, Center For Agricultural And Economic Development, Iowa State University, Walter W. Haessel, Earl O. Heady, Leo V. Mayer

CARD Reports

The over-all purpose of this study is to investigate the inter-relationships between the agricultural and nonagricultural sectors during the process of economic development, with some particular attention to the effects of food aid. The major portion of the study is devoted to a theoretical analysis of these intersectoral relationships. A five-sector, optimizing model of an underdeveloped, dual economy is formulated and extensively analyzed. The five sectors include subsistence or traditional agriculture, commercial agriculture, manufacturing goods production, capital goods production, and a government sector. Three products are produced: agricultural goods, which can only be consumed, manufacturing goods which can either be ...


Low-Energy Optical Absorption In Reo3, J. H. Weaver, David W. Lynch Nov 1972

Low-Energy Optical Absorption In Reo3, J. H. Weaver, David W. Lynch

Physics and Astronomy Publications

The absorptivity of polycrystalline samples of ReO3 has been measured in the range 0.11 to 2.8 eV using a calorimetric technique. New structures have been found in the absorptivity, appearing at about 0.4 and 1.0 eV. The data have been Kramers-Kronig analyzed to obtain the optical constants. Band-calculation results of Mattheiss are presented and a tentative identification of the origin of the new structures is made. A comparison of the present data with those of Feinleib, Scouler, and Ferretti is made.


The Howard University Reviews Of Science, Vol 1 No 3, Department Of Physics Nov 1972

The Howard University Reviews Of Science, Vol 1 No 3, Department Of Physics

Physics Faculty Publications

No abstract provided.


Irradiation Equivalence, Robert Katz, S. C. Sharma, M. Homayoonfar Nov 1972

Irradiation Equivalence, Robert Katz, S. C. Sharma, M. Homayoonfar

Robert Katz Publications

Recent analyses of track structure show that the parameters describing a radiation field are not separable from those describing a detecting system; that is, it is impossible to write an expression describing the effect of irradiation as a product of 2 factors, one of which contains only parameters describing the detecting system, while the other contains parameters describing only the radiation field. From this perspective it is difficult to understand the use of a “quality factor,” applicable to all biological substances and given as a function of the “effective LET,” for the conversion of rads to rems. One cannot define ...


Decay Of Multiple Spin Echoes In Dipolar Solids, C. H. Wang, John D. Ramshaw Nov 1972

Decay Of Multiple Spin Echoes In Dipolar Solids, C. H. Wang, John D. Ramshaw

Physics Faculty Publications and Presentations

In this paper we derive a general expression describing the evolution of the transverse nuclear-spin magnetization for the Ostroff-Waugh multiple-spin-echo experiment in dipolar solids. Our approach consists of expressing the formula for the magnetization at even echoes in a form resembling an ordinary time-correlation function, and then evaluating this quantity by means of Zwanzig's projection-operator technique. For long times, we show that under certain conditions the echo envelope decays exponentially, in agreement with experiment. A general expression is obtained for the time constant T* associated with the decay. This result may be used to generate an expansion of 1T ...


Magnetic And Thermometric Properties Of Na3[Ce(C7h3no4)3] ·15h2o In The Millikelvin Range, Richard A. Webb, J. C. Wheatley Oct 1972

Magnetic And Thermometric Properties Of Na3[Ce(C7h3no4)3] ·15h2o In The Millikelvin Range, Richard A. Webb, J. C. Wheatley

Faculty Publications

Measurements of the 16-Hz susceptibility of a powdered Na3[Ce(C7H3NO4)3] · 15H2O (CDP) sample, in the shape of a right-circular cylinder with diameter equal to height, have been made as a function of the Johnson noise temperature TJ of a resistor in the range 2 to 20 mK. Pure liquid 3He was used for thermal contact between the CDP and the noise thermometer in a demagnetization cell. The results are compared with similar data for cerium magnesium nitrate (CMN). CDP appears, like CMN, to have an anomalously low thermal ...


Observation Of Excitons In A Molecular Liquid: Specular Reflection Spectrum Of Α -Methylnaphthalene, Craig J. Eckhardt, Leo F. Nichols Oct 1972

Observation Of Excitons In A Molecular Liquid: Specular Reflection Spectrum Of Α -Methylnaphthalene, Craig J. Eckhardt, Leo F. Nichols

Craig J. Eckhardt Publications

The normal-incidence specular-reflection spectrum of liquid α-methylnaphthalene was obtained for the wavelength region from 215 to 400 nm. Comparison of the Kramers-Kronig transform of the reflection spectrum with the absorption spectrum of α-methylnaphthalene is cyclohexane shows the bands of the neat-liquid spectrum shift to lower energy and display significant broadening. These effects support the existence of excitons in molecular liquids.


Water Resources News, Volume 4, No. 8, October 1972 Oct 1972

Water Resources News, Volume 4, No. 8, October 1972

Water Current Newsletter

Updated Version of Proposed Regulations Now Available
EPA Issues New Application Form for Submission of Grant Proposals
Reclamation and Reuse of Solids and Wastes
Fall Meeting of Nebraska Section of AWRA
Technology Transfer Conference
OWRR Director Resigns
Requested Delay in Big Blue Plan
Missouri River Waterfront
Missouri River Basin Commission Notes
Missouri River Money Hurdle
Fish Tale
Water Pollution Veto Overturned
OWRR Priorities for Fiscal 1974


A Gastric Battery For Fish, Earl R. Kendle, Larry A. Morris Oct 1972

A Gastric Battery For Fish, Earl R. Kendle, Larry A. Morris

Nebraska Game and Parks Commission -- Staff Research Publications

We previously described, in Transactions of the American Fisheries Society (1965), vol. 94, p. 193-194 “A device for holding objects in the stomachs of fish," consisting of a 1/16-inch plastic rod formed to loop around the isthmus and extend down the gullet into the stomach. This harness was developed to secure an experimental gastric battery, not reported at that time. The battery was intended to power an ultrasonic tracking transmitter.

After 20-day trials of seven combinations of metals in an electrolytic solution of 0.5 percent hydrochloric acid, we chose gold and cadmium for the battery plates on the ...


L.A. General Data, Walter A. Lawrance Oct 1972

L.A. General Data, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


D.O. And Other Tests, Walter A. Lawrance Oct 1972

D.O. And Other Tests, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Special Reports, Walter A. Lawrance Oct 1972

Special Reports, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Pool Studies, Walter A. Lawrance Oct 1972

Pool Studies, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.