Physical Sciences and Mathematics Commons^™

Fluid Mechanics In The Elementary Laboratory, James C. Dennis

Faculty Publications

No abstract provided.

Can Psi Help Him?

Personalized System of Instruction (PSI), or Keller Plan, Materials

PSI (Personalized System of Instruction) can help students learn!

If the lecture-taught course has you meeting the students as adversaries, continually answering redundant questions, haggling over half credit for half correct answers, and generally finding your students being inhibited by the lock-step timing of a lecture course, then PSI is an alternative.

It is also the title of a film, PSI: An Alternative, that imaginatively and graphically outlines an intriguing and dynamic system for learning.

PSI (also known as the Keller Plan) is self-paced, mastery oriented, student tutored for junior college and college level instruction with classes of all sizes …

Personalized System Of Instruction (Psi): An Alternative, James G. Buterbaugh, Robert Fuller

Personalized System of Instruction (PSI), or Keller Plan, Materials

Buterbaugh and Fuller discuss the Personalized System of Instruction--what it is, how it can (or cannot) be evaluated, and some problems which may be encountered with its use. If the lecture-taught course has instructors meeting the students as adversaries, continually answering redundant questions, haggling over half-credit for half-correct answers, and generally finding most students being inhibited by the lock-step timing of a lecture course, then PSI is an alternative. Extensive acceptance and employment of this alternative mode of instruction should cause instructional developers to take another look at the essential features of the system. PSI has been widely employed by …

An Introduction To The Film, Personalized System Of Instruction: An Alternative, Instructional Media Center, University Of Nebraska-­Lincoln

Personalized System of Instruction (PSI), or Keller Plan, Materials

Who should see PSI: An Alternative ?

• Academic classroom instructors from all departments
• Junior college and college administrators
• Teaching method specialists
• Students in schools of education
• Media specialists
• Secondary school educators

You should see PSI: An Alternative.

A digital file of the 14-minute film is attached (below) as a Related File.

Introduction To The Calculus-Based Physics Modules, Robert Fuller

Personalized System of Instruction (PSI), or Keller Plan, Materials

MODULE AUTHORS

OWEN ANDERSON Bucknell University
STEPHEN BAKER Rice University
VAN BLEUMEL Worcester Polytechnic Institute
FERNAND BRUNSCHWIG Empire State College
DAVID JOSEPH University of Nebraska - Lincoln
ROBERT KARPLUS University of California - Berkeley
MICHAEL MOLONEY Rose Hulman Institute of Technology
JACK MUNSEE California State University - Long Beach
GARY NEWBY Boise State University
IVOR NEWSHAM Olivet Nazarene College
WILLIAM SNOW University of Missouri - Rolla
WILLARD SPERRY Central Washington State College
ROBERT SWANSON University of California - San Diego
JAMES TANNER Georgia Institute of Technology
DAVID WINCH Kalamazoo College

These modules were prepared by the module authors at a …

Byond Growth- Essays On Alternative Studies, Dennis L. Meadows, Donella H. Meadows, G. Evelyn Hutchinson, Eugene P. Odum, Herbert G. Wilcox, Lincoln H. Day, Herman E. Daly, William Ophuls, Charles S. Green Iii, Paul B. Sears

Yale School of the Environment Bulletin Series

No abstract provided.

Progress In Extractive Metallurgy, Volume 1. Review By G.N. Dobrokhotov, Fathi Habashi

Fathi Habashi

Review of the first volume of Progress in Extractive Metallurgy edited by Fathi Habashi and published by Gordon & Breach in New York in 1975. The review was written by Professor Dobrokhotov at the Leningrad Mining Institute.

The Glaciation Level And Lowest Equilibrium Line Altitude In The High Canadian Arctic: Maps And Climatic Interpretation, G. H. Miller, Raymond S. Bradley, J. T. Andrews

Raymond S Bradley

The glaciation level (GL) over the Queen Elizabeth Islands is highest over the main mountain areas. There are extremely steep gradients approaching 15 m km-t along the northwestern margin of the archipelago where the glaciation level is very low (300 m a.s.l.). Although the glaciation level mirrors topography on a gross scale, at the finer level the relationship breaks down, probably because of the effect of the mountains on precipitation patterns. There appears to be a sharp decline in the elevation of the glaciation level between the Canadian islands and northwest Greenland. The elevation of the lowest equilibrium line altitudes …

Equilibrium-Line Altitudes, Mass Balance, And July Freezing-Level Heights In The Canadian High Arctic, Raymond S. Bradley

Raymond S Bradley

Equilibrium-line altitudes on the White Glacier, Axel Heiberg Island, and the north-west sector of the Devon Ice Cap are shown to be closely related to mean July freezing-level heights at nearby upper-air weather stations. An inverse relationship between July freezing-level heights and mass balance on the Devon Ice Cap is also shown. Reasons for such correlations are suggested and some limitations of the relationship are outlined. Recent lowering of the freezing level in July is discussed in relation to the theoretical "steady-state" equilibrium-line altitudes in the Canadian high Arctic. It is suggested that positive mass-balance years have predominated over a …

Holocene Stratigraphy And Chronology Of Mountain Meadows, Sierra Nevada, California, Spencer H. Wood

Spencer H. Wood

Valley-fill deposits, exposed by Twentieth-Century dissection of a number of meadows on the west slope of the southern Sierra Nevada, contain a stratigraphic record strongly affected by secular variations in watershed hydrology during the Holocene. Meadows are situated in low gradient reaches, adaquately supported by seep-age water, where fine textured materials accumulate under present hydrologic conditions• Meadows do not necessarily owe their origin to glacial modification of drainage. Many meadows have formed in both glaciated and unglaciated valleys by a water table rise in valley-fill deposits. Ground water in any meadow drainage basin is annually recharged by snowmelt. Significant evapotranspiration …

Untitled (Subject: Measuring Sound), Richard C. Heyser

Unpublished Writings

In this essay, Richard C. Heyser explains his opinions and experiences on the measurement of sound. Heyser addresses the need to standardize language when addressing sound observations and discusses subjective perceptions of sound.

Properties Of Intercalated 2h-Nbse2, 4hb-Tas2 And 1t-Tas2, S. F. Meyer, R. E. Howard, G. R. Stewart, Juana Vivó Acrivos, T. H. Geballe

Faculty Publications, Chemistry

The layered compounds 2H-NbSe, 24Hb-TaS, 2and 1T-TaS2 have been intercalated with organic molecules; and the resulting crystal structure, heat capacity, conductivity, and superconductivity have been studied. The coordination in the disulfide layers was found to be unchanged in the product phase. Resistance minima appear and the superconducting transition temperature is reduced in the NbSe2 complex. Conversely, superconductivity is induced in the 4Hb-TaS2 complex. Corresponding evidence of a large change of the density of states, negative for 2H-NbSe2 and positive for 4Hb-TaS2, was also observed upon intercalation. The transport properties of all the intercalation complexes show a pronounced dependence upon the …

The Lippmann Equation And The Ideally Polarizable Electrode, Jean- Pierre Badiali, Jerry Goodisman

Chemistry - All Scholarship

The Lippmann equation for the ideally polarizable interface is normally derived by thermodynamics, using the Gibbs dividing surface. Therefore, the quantities appearing in the Lippmann equation can have no reference to the actual charge distribution in the interfacial region. For example, the quantity referred to as surface charge is actually a sum of surface excesses, rather than the integral of a true charge density. In this article we derive, by statistical mechanical methods, the Lippmann equation for a model at the molecular level, thus giving a precise physical definition to all quantities which appear. First, we derive the conditions for …

Observation And Prediction Of Soil Water Under Different Types Of Vegetation, D. V. Wroblewski, D. F. Grigal

Journal of the Minnesota Academy of Science

Soil water trends were monitored during the 1971 growing season on the Anoka Sand Plain in east-central Minnesota. Soils were sampled under four vegetation densities, ranging from old field through increasing amounts of oak overstory. There was no difference over the sampled period in total soil water content (to 100 cm) on the four sites. Differences were found in water content of individual soil horizons, and especially in the surface horizon (0 to 10 cm). A model of evapotranspiration was used to simulate the observed trends and the prediction and observations were closely correlated (r2 ~ 0 .91).

Glacial Lake Evidence In Western Minnesota As Interpreted From The Soil Survey, Raymond T. Diedrick, Richard H. Rust

Journal of the Minnesota Academy of Science

Soil surveys in several counties in western Minnesota have revealed a soils pattern which provides geomorphic evidence for a previously unrecognized glacial lake. This glacial lake, here called Glacial Lake Benson, is about 60 miles long, 40 miles wide and of almost one million acres in area. Soils along its northern boundary are generally developed in coarse outwash. The central and southern portions of the lake basin have well-sorted silty soils, similar to those in Glacial Lake Agassiz. The elevation of the outer edge of the Benson basin is about 1,050 feet. Topographic maps were used to prepare transects which …

Limnological Observations On A Small River, Donald G. Kaddatz

Journal of the Minnesota Academy of Science

Limnological conditions were studied in the Snake river at Mora, in east-central Minnesota, over a 13- month period. Sampling stations were established above and below the sewage outfall from the city of Mora to assess the river's physical and chemical parameters. Seasonal changes and fluctuations related to discharge flow were observed and recorded.

Effect Of Feedlots On Water Quality, Ronald D. Cheetham, Alan J. Holmes, David Borresen

Journal of the Minnesota Academy of Science

The effect of feedlot runoff on water quality was examined. Samples were collected from river feedlots and offshore from lake feedlots and compared with samples from appropriate control sites. Bacterial contamination, as measured by the total coliform test over two successive summers, exhibited significant variation between feedlot and control sites. Coliform levels at lake sites adjacent to feedlots were double the levels at control sites; while in river systems average coliform levels downstream from feedlots were approximately 17 times the upstream controls.

Gravitational Motion: An Interaction?, Frank H. Meyer

Journal of the Minnesota Academy of Science

"Non-implications" in Newton's Law of Gravitation are discussed to emphasize different approaches in two books treating the subject: Dewey Larson's Beyond Newton, and Gravitation, by Misner, Thorne and Wheeler. The author notes that the latter book ignores the possibility that gravitation may not be an interaction; while Larson accepts Newton's Law of Gravitation as a mathematically valid statement of Kepler's Laws of Planetary Motion, thus being applicable to the sun and planets even if they are not actually interacting.

The Absolute Continuity Of Phase Operators, Joanne Dombrowski, G. H. Fricke

Mathematics and Statistics Faculty Publications

This paper studies the spectral properties of a class of operators known as phase operators which originated in the study of harmonic oscillator phase. Ifantis conjectured that such operators had no point spectrum. It was later shown that certain phase operators were, in fact, absolutely continuous and that all phase operators at least had an absolutely continuous part. The present work completes the discussion by showing that all phase operators are absolutely continuous.

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.

Program For Missing Data In The Multivariate Normal Distribution, Chi-Ping Lu

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

Missing data can often cause many problems in research work. Therefore for carrying out analysis, some procedure for obtaining estimates in the presence of missing data should be applied. Various theories and techniques have been developed for different types of problems.

Analysis of the Multivariate Normal Distribution with missing data is one of the areas studied. It has been discussed earlier by Wilkes (1932), Lord (1955), Edgett (1956) and Hartley (1958). They have established some basic concepts and an outline in the way of estimation.

In the last ten years, A. A. Afifi and R. M. Elasfoff also have contributed …

Multivalue Methods, Clayton V. Henrie

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

Methods of solving ordinary differential equations with initial conditions are of a great importance to engineers and scientists. Many of these equations can be solved by well-known analytical techniques, but a greater number of physically significant differential equations cannot be so solved. Thus, the solutions of these equations must be approximated numerically. It is the purpose of this paper to investigate the techniques used in solving differential equations with initial conditions by "multivalue methods."

Discriminant Function Analysis, Kuo Hsiung Su

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

The technique of discriminant function analysis was originated by R.A. Fisher and first applied by Barnard (1935). Two very useful summaries of the recent work in this technique can be found in Hodges (1950) and in Tosuoka and Tiedeman (1954). The techniques have been used primarily in the fields of anthropology, psychology, biology, medicine, and education, and have only begun to be applied to other fields in recent years.

Classification and discriminant function analyses are two phases in the attempt to predict which of several populations an observation might be a member of, on the basis of multivariate measurements. Both …

An Evaluation Of Bartlett's Chi-Square Approximation For The Determinant Of A Matrix Of Sample Zero-Order Correlation Coefficients, Stephen M. Hattori

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

The single equation least-squares regression model has been extensively studied by economists and statisticians alike in order to determine the problems which arise when particular assumptions are violated. Much literature is available in terms of the properties and limitations of the model. However, on the multicollinearity problem, there has been little research, and consequently, limited literature is available when the problem is encountered. Farrar & Glauber (1967) present a collection of techniques to use in order to detect or diagnose the occurrence of multicollinearity within a regression analysis. They attempt to define multicollinearity in terms of departures from a hypothesized …

Some Results On Weighing Matrices, Jennifer Seberry, Albert Leon Whiteman

Faculty of Informatics - Papers (Archive)

It is shown that if q is a prime power then there exists a circulant weighing matrix of order q² + q + 1 with q² non-zero elements per row and column.

This result allows the bound N to be lowered in the theorem of Geramita and Wallis that " given a square integer k there exists an integer N dependent on k such that weighing matrices of weight k and order n and orthogonal designs (1, k) of order 2n exist for every n > N".

On Hadamard Matrices, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

Recent advances in the construction of Hadamard matrices have depended on the existence of Baumert-Hall arrays and four (1, -1) matrices A, B, C, D of order m which are of Williamson type, that is pairwise satisfy

(i) MN^T = NM^T and

(ii) AA^T + BB^T + CC^T + DD^T = 4ml_m.

If (i) is replaced by (i')MN = NM we have Goethals-Seidel matrices. These matrices are very important to the determination of the Hadamard conjecture: that there exists an Hadamard matrix of order 4t for all natural numbers t. This paper …

Orthogonal Designs: Ii, Anthony V. Geramita, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

Orthogonal designs are a natural generalization of the Baumert-Hall arrays which have been used to construct Hadamard matrices. We continue our investigation of these designs and show that orthogonal designs of type (1, k) and order n exist for every k < n when n = 2^t+2. 3 and n = 2^t+2.5 (where t is a positive integer). We also find orthogonal designs that exist in every order 2n and others that exist in every order 4n.

Coupled with some results of earlier work, this means that the weighing matrix conjecture 'For every order n = 0 (mod4) there is, for each …

Orthogonal Designs Iv: Existence Questions, Anthony V. Geramita, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

In [5] Raghavarao showed that if n = 2 (mod 4) and A is a {O, 1, -1} matrix satisfying AA^t = (n - 1) I_n. then n - 1 = a² - b² for a, b integers. In [4] van Lint and Seidel giving a proof modeled on a proof of the Witt cancellation theorem, proved more generally that if n is as above and A is a rational matrix satisfying AA^t = kI_n then k = q_1² + q₂² (q₁, q₂ E Q, the …

Construction Of Williamson Type Matrices, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

Recent advances in the construction of Hadamard matrices have depended on the existence of Baumert-Hall arrays and four (1, - 1) matrices A, B, C, D of order m which are of Williamson type, that is they pair-wise satisfy

i) MN^T = NM^T, M, N E {A, B, C, D} and

ii) AA^T + BB^T + CC^T + DD^T = 4mI_m.

It is shown that Williamson type matrices exist for the orders m = s(4s - 1), m = s(4s + 3) for s E {1, 3, 5, ... ,25} and …

Orthogonal Designs, Anthony V. Geramita, Joan Murphy Geramita, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

Orthogonal designs of special type have been extensively studied, and it is the existence of these special types that has motivated our study of the general problem of the existence of orthogonal designs.

This paper is organized in the following way. In the first section we give some easily obtainable necessary conditions for the existence of orthogonal designs of various order and type. In Section 2 we briefly survey the examples of such designs that we have found in the literature. In the third section we describe several methods for constructing orthogonal designs. In the fourth section we obtain some …