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Articles 284311 - 284340 of 293713

Full-Text Articles in Physical Sciences and Mathematics

A Revision Of The Feather Mite Genus Brephosceles (Proctophyllodidae: Alloptinae), Paul C. Peterson May 1971

A Revision Of The Feather Mite Genus Brephosceles (Proctophyllodidae: Alloptinae), Paul C. Peterson

Bulletin of the University of Nebraska State Museum

A systematic revision is presented for the genus Brephosceles. Data on external morphology, zoogeography, and host-parasite relationships are included. Thirteen named and thirty new species are recognized and described. The new species and the type hosts are: Brephosceles afribycis, from Afribyx lateralis (Charadriidae); B. anhimae, from Anhima cornuta (Anhimidae); B. belonopteri, from Belonopterus chilensis cayennensis (Charadriidae); B. bilobatus, from Puffinus puffinus (Procellariidae); B. chilensis, from Belonopterus chilensis lampronotus (Charadriidae); B. collaracus, from Charadrius collaris (Charadriidae); B. constrictus, from Charadrius bicinctus (Charadriidae); B. diomedei, from Diomedea chrysostoma (Diomedeidae); B. discidicus, from Cygnus bewickii (Anatidae); B. disjunctus, from Pterodroma leucoptera hypoleuca (Procellariidae); …


Water Resources News, Volume 3, No. 5, May 1971 May 1971

Water Resources News, Volume 3, No. 5, May 1971

Water Current Newsletter

Congratulations Doane College
OWRR Announces Fiscal Year 1972 Title II Water Resources Research Program
Economic Analysis of Water Projects
New Federal Department of Natural Resources
Research and Development Sources Sought
Water Quality Guidelines


Geologic And Stratigraphig Investigation Of The Darende-Balaban Basin (Malatya, Ese Turkey)*, Mehmet F. Akkuş May 1971

Geologic And Stratigraphig Investigation Of The Darende-Balaban Basin (Malatya, Ese Turkey)*, Mehmet F. Akkuş

Bulletin of the Mineral Research and Exploration

No abstract provided.


Terminal Talk - The Wofford Connection- May 1971, Wofford College Computer Center May 1971

Terminal Talk - The Wofford Connection- May 1971, Wofford College Computer Center

Terminal Talk

No abstract provided.


U. S. U. Mathematical Programming Package, R. Gary Goodwin May 1971

U. S. U. Mathematical Programming Package, R. Gary Goodwin

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

Solving mathematical programming problems without the aid of electronic computers is very time consuming even for a mathematical model consisting of only a few constraints and variables. The objective of this report is to illustrate the use of mathematical programming computer routines available at Utah State University. Computer routines discussed are the International Business Machines (IBM), Mathematical Programming System (MPS) package, a quadratic programming routing, a zero-one integer programming routing, and a transportation code. The MPS package is a product of IBM; the quadratic programming routing was develop by the author: the last three routines were obtained from the IBM …


The Gonads Of The South American Dolphins, Inia Geoffrensis, Pontoporia Blainvillei, And Sotalia Fluviatilis, Richard J. Harrison, Robert L. Brownell Jr. May 1971

The Gonads Of The South American Dolphins, Inia Geoffrensis, Pontoporia Blainvillei, And Sotalia Fluviatilis, Richard J. Harrison, Robert L. Brownell Jr.

United States Department of Commerce: Staff Publications

The appearances of the gonads are described in males and females of 18 Inia geoffrensis, 11 Pontoporia blainvillei, and eight Sotalia fluviatilis from South America. Males of I. geoffrensis become sexually active at a length of about 228 centimeters, females at 175 to 180 centimeters. Length at birth is 76 to 80 centimeters; parturition occurs from about July to September in the upper Amazon. Males of P. blainvillei are still sexually immature at a length of 128.5 centimeters, females become sexually active at a length of 137 centimeters. Off Uruguay, pregnant females have fetuses 6 centimeters in length …


Petrology And Structure Of Eastern Monte Largo Hills, New Mexico, Jan Ralph Huzarshi May 1971

Petrology And Structure Of Eastern Monte Largo Hills, New Mexico, Jan Ralph Huzarshi

Earth and Planetary Sciences ETDs

In the Monte Largo Hills in the central part of north-central New Mexico, Precambrian metamorphic and igneous rocks, Paleozoic sediments, and Tertiary intrusive and extrusive igneous rocks occur. The metamorphics consist of a series of quartzo-feldspathic gneiss, mica schist, metaquartzite, and hornblende schists. These rocks were

derived from Precambrian sediments, mostly sandstones, arkoses and impure dolomites that were subjected to amphibolite facies synkinematic metamorphism. The Precambrian alkali granite appears to have been allochthonously emplaced with evidence near the contact of the quartzofeldspathic metamorphics for a parautochthonous formation. Quartz veins and pegmatite dikes of Precambrian age are also present. The sediments …


Mineralogische Beschreibung Der Radioaktiven Strandseifen In Der Biga-Halbinsel Südlich Von Der Historischen Stadt Troja Und Deren Ursprungsgesteine (West-Türkei), Muzaffer Andaç May 1971

Mineralogische Beschreibung Der Radioaktiven Strandseifen In Der Biga-Halbinsel Südlich Von Der Historischen Stadt Troja Und Deren Ursprungsgesteine (West-Türkei), Muzaffer Andaç

Bulletin of the Mineral Research and Exploration

No abstract provided.


Esquisse Géologique De La Région D'Alanya (Taurus Méridional) Origine Des Bauxites Métamorphiques, Philippe De Peyronnet May 1971

Esquisse Géologique De La Région D'Alanya (Taurus Méridional) Origine Des Bauxites Métamorphiques, Philippe De Peyronnet

Bulletin of the Mineral Research and Exploration

No abstract provided.


Die Entstehung Des Vulkanischen Kaolins Und Das Andesit-Problem*, İsmail Seyhan May 1971

Die Entstehung Des Vulkanischen Kaolins Und Das Andesit-Problem*, İsmail Seyhan

Bulletin of the Mineral Research and Exploration

No abstract provided.


A Monte Carlo Evaluation Of A Nonparametric Technique For Estimating The Hazard Function, Sheng Jia Lin May 1971

A Monte Carlo Evaluation Of A Nonparametric Technique For Estimating The Hazard Function, Sheng Jia Lin

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

This research is primarily concerned with the estimation of the Hazard functions, the Hazard function is the failure rate at time t, and is defined as -R '(t)/R(t), so it plays an important role in Reliability.

In order to compare and evaluate the estimation methods, it is convenient to select one distribution in this research. Since the Weibull distribution is a useful distribution in Reliability, the Weibull distribution is used in this paper.


Statistical Analysis For Tolerances Of Noxious Weed Seeds, Yadolah Dodge May 1971

Statistical Analysis For Tolerances Of Noxious Weed Seeds, Yadolah Dodge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An analysis of the previous method for testing tolerances of noxious weed seeds was performed. Problems of the current techniques were discussed, and the solution to these problems was given.

A new technique of testing through the sequential test ratio was developed, and results examined.

The sequential test was found to be useful enough to include the use of it in determining tolerances for noxious weed seeds.

This study did show that the use of sequential tests does have excellent potential and flexibility as a statistical tool for the tolerances of noxious weed seeds.


A Comparative Study Of Boron Adsorption By A Calcareous And An Acid Soil, Namik M. Ali Rashid May 1971

A Comparative Study Of Boron Adsorption By A Calcareous And An Acid Soil, Namik M. Ali Rashid

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The adsorption of boron by Aiken clay loam and Vernal sandy loam was studied in the boron equilibrium concentration range of 0 to 40 ppm. Adsorption data were obtained at 11, 20 and 30°C. The data were analyzed by the application of the Langmuir adsorption isotherm. It was concluded that, in both soils, the adsorption of boron occurred on three distinct sites or regions.

The acid ferrigenous Aiken soil had a higher adsorption capacity for boron than the calcareous Vernal soil when compared on a unit mass basis. On the unit area basis, however, the Vernal soil adsorbed more boron …


Torus Knots, David S. Bradley May 1971

Torus Knots, David S. Bradley

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

We have compiled here many interesting results concerning a particular collection of knots called torus knots. Torus knots are merely simple closed curves imbedded in an unknotted torus T2 in E3. We show that the fundamental groups of T2, π(T2), is the direct product of the additive group of integers with itself. The ordered pair (p, q) in Z x Z determines an equivalence class of loops on the torus, and we show in Section II that the class [(p, q)] contains a loop whose image is a simple closed curve if and …


Geology Of The Hogback Mountain Area, Northern Big Belt Mountains, Montana., William L. Shaffer May 1971

Geology Of The Hogback Mountain Area, Northern Big Belt Mountains, Montana., William L. Shaffer

Earth and Planetary Sciences ETDs

The Hogback Mountain area is located in the northern part of the Big Belt Mountains, twenty miles northeast of Helena, Montana.

Sedimentary rocks range in age from Precambrian to Recent, and have an aggregate thickness of about 16, 500 feet. The oldest stratified rocks are two conformable formations of the Precambrian Belt Series; the Newland Formation (oldest) and the Greyson Shale. These rocks have an aggregate thickness of about 10,700 feet.

Rocks of the Belt Series are unconformably overlain by about 1,200 feet of strata of Middle and Late Cambrian age separated into five conformable formation: the Flathead Sandstone (oldest), …


Fourier Transforms Of Unbounded Measures, Loren Argabright, Jesus De La Lamadrid May 1971

Fourier Transforms Of Unbounded Measures, Loren Argabright, Jesus De La Lamadrid

Department of Mathematics: Faculty Publications

Let G be a locally compact abelian group. For a (generally unbounded) measure μ on G we shall say that μ is transformable if there is a measure μˆ on the character group Γ of G such that, for every ƒЄK(G), the space of continuous functions with compact support on G,ƒЄL2(μ) and (1) ∫Gƒ**ƒ(x) dμ(x) = ∫r|∫(γ-1)|2dμ(γ). The resulting "Fourier transformation” μ→μˆ contains the classical theory and leads to generalizations of a variety of classical results, including the Plancherel theorem and the Poisson summation …


Regressive And Transgressive Phenomena In The Gallup Sandstone In The Northwestern Part Of San Juan County, New Mexico., Francis Amrisar Kaharoeddin May 1971

Regressive And Transgressive Phenomena In The Gallup Sandstone In The Northwestern Part Of San Juan County, New Mexico., Francis Amrisar Kaharoeddin

Earth and Planetary Sciences ETDs

The sedimentary history of the Gallup Sandstone is studied through the field investigation and laboratory analysis of samples taken from four measured sections in the vicinity of the San Juan River and one section near the Red Rock Highway. In addition to field data, textural parameters and dolomite and glauconite content of sandstone samples are the basis for interpretations of the sedimentary history and environment of deposition of the Gallup Sandstone.

A plot of the mean grain-size and sorting along with stratigraphic sections reveals that most of the Gallup Sandstone was deposited in a regressive sea, and that the regression …


Eutrophication Of Small Lakes, Lynn T. Kenison May 1971

Eutrophication Of Small Lakes, Lynn T. Kenison

Theses and Dissertations

An estimate was made to determine the amount of nitrate and phosphate entering Utah Lake in 1968. To make this estimate, the flow data for 1968 and the nitrate and phosphate concentrations for 1970 were used. This was done because of the lack of information. The results show that the total nitrate added to Utah Lake in 1968 was 7,638,000 pounds. The total phosphate added was 1,740,200 pounds. Of this amount, 12,4 per cent of the nitrate and 18.0 per cent of the phosphate was released from the lake through the Jordan River. The rest remained in the lake to …


Some Aspects Of Muskrat Ecology At Big Island Lake, Alberta, Roger G. Schmitke May 1971

Some Aspects Of Muskrat Ecology At Big Island Lake, Alberta, Roger G. Schmitke

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The untimely death brought to a stop the work on his Master of Science degree and a termination of a promising career in the conservation field. Drowned in the line of duty was Roger Schmitke on June 10, 1965, in the Redwater River near Edmonton, Alberta, Canada.

Prior to his death, Roger had worked diligently on his research assignment and had collected all of the data deemed necessary for the completion of the thesis. Partial analysis of the data had been made. The present volume is an attempt to bring together his data and analyses for presentation to his graduate …


Growing Season Air-Soil Temperature Relationships At Lincoln, Nebraska, Ralph E. Neild May 1971

Growing Season Air-Soil Temperature Relationships At Lincoln, Nebraska, Ralph E. Neild

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This study concerns the use of weekly average air temperature for predicting weekly average soil temperature under different conditions of surface cover during different times of year. Probabilities of weekly average air temperature for Lincoln as well as other Nebraska locations are available. These probabilities and the soil temperature prediction equations may be used in determining expected soil temperatures.


Publications Of The Mineral Research And Exploration Institute Of Turkey, - - May 1971

Publications Of The Mineral Research And Exploration Institute Of Turkey, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.


Jungpaläozoikum Und Älteres Mesozoikum In Nordwest-Anatolien*, R. Brinkmann May 1971

Jungpaläozoikum Und Älteres Mesozoikum In Nordwest-Anatolien*, R. Brinkmann

Bulletin of the Mineral Research and Exploration

No abstract provided.


Statistical Prospection Of Epigenetic Ore Deposits, Halil Aral, Mustafa Akgül May 1971

Statistical Prospection Of Epigenetic Ore Deposits, Halil Aral, Mustafa Akgül

Bulletin of the Mineral Research and Exploration

No abstract provided.


M.T.A. Dergi̇si̇nde Yayinlanmak Üzere Yazi Göndereceklerden Di̇lekleri̇mi̇z, - - May 1971

M.T.A. Dergi̇si̇nde Yayinlanmak Üzere Yazi Göndereceklerden Di̇lekleri̇mi̇z, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.


Yeralti Suyu Bi̇lançosu, Baki Cani̇k May 1971

Yeralti Suyu Bi̇lançosu, Baki Cani̇k

Bulletin of the Mineral Research and Exploration

No abstract provided.


The Ias Bulletin, V5n3, May 1971, Iowa Academy Of Science May 1971

The Ias Bulletin, V5n3, May 1971, Iowa Academy Of Science

IAS Bulletin

In this issue:

--- Officers, Directors, and Section Chairmen, 1971-72
--- Election Results
--- Attendance at 83rd Session
--- Membership at all Time High
--- Section Interests Among Academy Members
--- Visiting Scientist Program Dead
--- Iowa Science Teachers Journal to be Distributed Only as Requested
--- Social Implications Committee Selects Single Concern for its Attention
--- Important Recommendations from the Academy's Committee on Governmental Cooperation and Assistance
--- Academy Farm Operating Under New Policies
--- Student Programs to be Evaluated
--- Recognition and Awards
--- Explanation of Election Ballot with Signature Space
--- Two Junior Academy Members to Represent …


I. Studies Toward The Synthesis Of Echinodithianic Acid And Ii. The Temperature Dependent Nmr Spectrum Of Methyl N-Acetylsarcosinate, Alan Leroy Love May 1971

I. Studies Toward The Synthesis Of Echinodithianic Acid And Ii. The Temperature Dependent Nmr Spectrum Of Methyl N-Acetylsarcosinate, Alan Leroy Love

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Approaches to the preparation of echinodithianic acid (5) from 2,5-dicarbomethoxy-1,4-dithiane (1) were not successful, due to the inability to carboxylate or carboalkoxylate 1 at carbons 2 and 5. Studies toward the synthesis of 5 utilizing methyl 2-acetamidoacrylate (8) have been investigated. The electrophilic addition of sulfur dichloride to 8 yielded bis-(2-acetamido-2-carbo-methoxyvin-1-yl) sulfide, while the addition of thiocyanogen chloride to 8 produced methyl 2-acetamido-3-thiocyanato-acrylate.

As electrophilic additions of unsymmetrical dipolar reagents to methyl 2-acetamidoacrylate (8) are not reported in the literature, the addition of hydrogen bromide to 8 was studied to determine the orientation effect of the acetamido group.

Methyl 2-acetamido-2-bromopropionate …


The Effectiveness Of Categorical Variables In Discriminant Function Analysis, Preston Jay Waite May 1971

The Effectiveness Of Categorical Variables In Discriminant Function Analysis, Preston Jay Waite

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A preliminary study of the feasibility of using categorical variables in discriminant function analysis was performed. Data including both continuous and categorical variables were used and predictive results examined.

The discriminant function techniques were found to be robust enough to include the use of categorical variables.

Some problems were encountered with using the trace criterion for selecting the most discriminating variables when these variables are categorical. No monotonic relationship was found to exist between the trace and the number of correct predictions.

This study did show that the use of categorical variables does have much potential as a statistical tool …


The Poincaré Conjecture, Joseph D. Peck May 1971

The Poincaré Conjecture, Joseph D. Peck

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The central theme for this paper is provided by the following three statements:

(1) Every compact connected 1-manifold is S1.

(2) Every compact connected simply connected 2-manifold is S2.

(3) Every compact connected simply connected 3-manifold is S3.

We provide proofs of statements (1) and (2). The veracity of the third statement, the Poincaré Conjecture, has not been determined. It is known that should a counter-example exist it can be found by removing from S3 a finite collect ion of solid tori and sewing them back differently. We show that it is not possible to find a counterexample by removing …


Fitting Some Families Of Contagious Distributions To Biological And Accident Data, Yung-Sung Lee May 1971

Fitting Some Families Of Contagious Distributions To Biological And Accident Data, Yung-Sung Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Four families of contagious distributions--generalized Poisson distributions, generalized binomial distributions, generalized Pascal distributions, and generalized log-zero distributions--are investigated in this thesis.

The family of generalized Poisson distributions contains five distributions: the Neyman Type A, the "Short," the Poisson binomial, the Poisson Pascal, and the negative binomial. The family of generalized binomial distributions contains eight distributions: the binomial Poisson, the binomial binomial, the binomial Pascal, the binomial log-zero, the Poisson with zeros, the binomial with zeros, the Pascal with zeros, and the log-zero with zeros. The family of generalized Pascal distributions contains four distributions: the Pascal Poisson, the Pascal binomial, the …