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Articles 4621 - 4650 of 7069

Full-Text Articles in Science and Mathematics Education

Introduction (1993), Russell Howell Jun 1993

Introduction (1993), Russell Howell

ACMS Conference Proceedings 1993

Paradigm Shifts in the Mathematical Sciences


Using Matlab And Mathematica In Numerical Analysis, John H. Matthews Jun 1993

Using Matlab And Mathematica In Numerical Analysis, John H. Matthews

ACMS Conference Proceedings 1993

No abstract provided.


Abraham Robinson (1918-1974): The Man And The Mathematics, Joseph W. Dauben Jun 1993

Abraham Robinson (1918-1974): The Man And The Mathematics, Joseph W. Dauben

ACMS Conference Proceedings 1993

No abstract provided.


Infinity And The Absolute: Insights Into Our World, Our Faith, And Ourselves, Tim Pennings Jun 1993

Infinity And The Absolute: Insights Into Our World, Our Faith, And Ourselves, Tim Pennings

ACMS Conference Proceedings 1993

No abstract provided.


Devotional Reflections, Jonathan Leech Jun 1993

Devotional Reflections, Jonathan Leech

ACMS Conference Proceedings 1993

No abstract provided.


Georg Cantor And The Battle For Transfinite Set Theory, Joseph Dauben Jun 1993

Georg Cantor And The Battle For Transfinite Set Theory, Joseph Dauben

ACMS Conference Proceedings 1993

Georg Cantor is well known as the founder of transfinite set theory. Equally celebrated, however, are the obstacles he faced in trying to win acceptance for his seemingly unorthodox views, his acrimonious differences with Leopold Kronecker and his unfortunate but progressively debilitating nervous breakdowns that some authors have linked directly to his many problems with set theory. Above all, Cantor's justification of set theory was all the more urgent because of Kronecker's critical denunciation of Cantor's mathematics. In tracing the evolution of Cantorian set theory, it is necessary to examine the opposition it met, and evaluate the technical, philosophical, psychological, …


Table Of Contents (1993), Association Of Christians In The Mathematical Sciences Jun 1993

Table Of Contents (1993), Association Of Christians In The Mathematical Sciences

ACMS Conference Proceedings 1993

Paradigm Shifts in the Mathematical Sciences


Schedule (1993), Association Of Christians In The Mathematical Sciences Jun 1993

Schedule (1993), Association Of Christians In The Mathematical Sciences

ACMS Conference Proceedings 1993

Paradigm Shifts in the Mathematical Sciences


The Iowa Academy Of Science President's Banquet, 105th Session, Iowa Academy Of Science Apr 1993

The Iowa Academy Of Science President's Banquet, 105th Session, Iowa Academy Of Science

Iowa Academy of Science Documents

Program:

Introductions
Awards:
Distinguished Fellow: George Burnet
Distinguished Iowa Science Teaching: Jay P. Kopp
Awarding of the Runkel-Roosa Natural History Research Grant
President's Address - outgoing President William Deskin
Response - President Jean Prior
General Sessions II - Robert Monserrate, "Crime Scene Search and Forensic Analysis"


105th Session Iowa Academy Of Science Awards Luncheon, April 23, 1993, Iowa Academy Of Science Apr 1993

105th Session Iowa Academy Of Science Awards Luncheon, April 23, 1993, Iowa Academy Of Science

Iowa Academy of Science Documents

Program:

--- Introduction of Head Table - William Deskin, President, Iowa Academy of Science
--- Recognition of students participating in various statewide activities - Larry Schwinger, Chair, Student Programs Committee
--- Presentation of scholarship winners and 1994 AJAS representatives - Peggy Tilgner, Wartburg College, Waverly
--- Presentation of Excellence in Science Teaching Awards - Roy Unruh, Director, ESTA Program


The Annual Meeting Of The Iowa Academy Of Science April 23-24, 1993 [Program, 105th Meeting], Iowa Academy Of Science Apr 1993

The Annual Meeting Of The Iowa Academy Of Science April 23-24, 1993 [Program, 105th Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 5
General Session Speakers --- 9
Awards --- 12
Distinguished Iowa Science Teaching --- 12
Symposia Programs --- 13
STN Workshop --- 14
Poster Session --- 15
Campus Map --- Centerfold
Section Programs --- 18
Agricultural Sciences --- 18
Anthropology --- 18
Botany --- 19
Cellular & Molecular Biology --- 21
Chemical Education --- 24
Chemistry, Inorganic --- 24
Chemistry, Organic --- 26
Conservation --- 27
Earth Science Teaching --- 29
Elementary Science Teaching --- 29
Engineering --- 29
Geology --- 31
Linguistics --- 32
Nursing --- 32
Physics --- 33
Physiology --- 34
Psychology --- …


Geological Field Guide To The Cedar Point Biological Station, Keith County, Nebraska, Robert F. Diffendal Jr., Roger K. Pabian Feb 1993

Geological Field Guide To The Cedar Point Biological Station, Keith County, Nebraska, Robert F. Diffendal Jr., Roger K. Pabian

School of Natural Resources: Faculty Publications

This field guide was produced by staff members of the Conservation and Survey Division of the University of Nebraska originally in 1979 at the request of Dr. Brent Nickol, former Director of the Cedar Point Biological Station. It is an introduction to the geologic history and paleoecology of the Cedar Point area intended for students, staff, and other persons using the camp. This revision has been made some 15 years after the first version to reflect changes in ideas resulting from new data collected during that time.

Users of this guide should take care when studying the rock exposures described …


Front Matter Jan 1993

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Cover - Table Of Contents Jan 1993

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Editorial Board & Iowa Academy Of Science Officers And Directors Jan 1993

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Back Cover Jan 1993

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


The Pleistocene Glacial Record At Two Quarries In Decatur County, Iowa, Keith E. Schilling, Robert A. Stewart Jan 1993

The Pleistocene Glacial Record At Two Quarries In Decatur County, Iowa, Keith E. Schilling, Robert A. Stewart

Journal of the Iowa Academy of Science: JIAS

The Pleistocene stratigraphy and sedimentology of two quarry exposures near Grand River and Decatur City in Decatur County, Iowa document a sequence of Pleistocene sediments overlying striated Pennsylvanian limestone which represent at least two pre-Illinoian glacial advances into the ancestral Grand River valley. Two pre-Illinoian diarnictons separated by a clast pavement were observed at the Decatur City quarry; a single diarnicton was present at the Grand River quarry. At both quarries, the diarnictons exhibit comparable lithologic properties and are genetically interpreted as basal tills. The pre-Illinoian tills are tentatively correlated with the Alburnett Formation in eastern Iowa, primarily on the …


Competitive Abilities Of Oat And Barley Varieties, B. D. Mcbratney, K. J. Frey Jan 1993

Competitive Abilities Of Oat And Barley Varieties, B. D. Mcbratney, K. J. Frey

Journal of the Iowa Academy of Science: JIAS

Competitive ability of a plant genotype reflects its capacity to yield well and compete successfully for light, moisture, and nutrients when grown with similar or dissimilar genotypes. This trait is important to plant breeding because most breeding populations are propagated in mixed or competitive stands. The objective of this study was to assess the competitive abilities of oat and barley genotypes.

Two sets of oat and barley genotypes were evaluated for competitive ability. Set I consisted of five oat varieties, and Set II consisted of two barley and three oat varieties. Neither set, when averaged, showed over- or under-compensation with …


The Early History And Recent Trends In Iowa Herpetology, Reeve M. Bailey, James L. Christiansen Jan 1993

The Early History And Recent Trends In Iowa Herpetology, Reeve M. Bailey, James L. Christiansen

Journal of the Iowa Academy of Science: JIAS

Herpetological exploration of Iowa began in 1823 with Long's expedition to the Rocky Mountains. From that time until an 1892 publication by Osborn based on Iowa specimens, herpetological research in the state was minor and incidental. Several significant reports appeared after that date involving analysis of Iowa specimens and from 1938 to 1944 a major base-line collection of the amphibians and reptiles of Iowa was established. Studies after that time have added a few species to Iowa’s known herpetofauna but recently have concentrated not only on composition of the fauna and distribution, but emphasized population changes, ecological relationships, and better …


Some Significant Iowa Plant Records From The Herbarium Of University Of Nebraska At Omaha, Barbara L. Wilson Jan 1993

Some Significant Iowa Plant Records From The Herbarium Of University Of Nebraska At Omaha, Barbara L. Wilson

Journal of the Iowa Academy of Science: JIAS

Though the herbarium of University of Nebraska at Omaha (OMA) lies outside the state boundaries, it contains a number of interesting western Iowa records. Publicizing these and other little-known Iowa plant records is especially important at this time, since a checklist of Iowa's vascular plants, compiled by Eilers and Roosa, is nearing completion.


Test 1667: John Deere 7700 Powershift Diesel 19-Speed, Nebraska Tractor Test Lab Jan 1993

Test 1667: John Deere 7700 Powershift Diesel 19-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …


Editorial Board & Iowa Academy Of Science Officers And Directors Jan 1993

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Community Dynamics Of Phytoplankton In A Typical Navigation Pool In The Upper Mississippi River, Theodore R. Lange, Ronald G. Rada Jan 1993

Community Dynamics Of Phytoplankton In A Typical Navigation Pool In The Upper Mississippi River, Theodore R. Lange, Ronald G. Rada

Journal of the Iowa Academy of Science: JIAS

In 1986 we studied phytoplankton in the mid-reaches of Pool 8, which is a typical navigation pool of the Upper Mississippi River. During years of normal discharge, the areas studied usually become distinctly different from each other (ranging from free-flowing river to stagnant marsh) as the ice-free season progresses. These differences among sites did not occur during our study because the discharge into Pool 8 during 1986 was about 85% greater than the 10-yr mean discharge (1972-1982). Moreover, differences among areas were not observed with respect to physical and chemical characteristics such as photic zone depth, temperature, dissolved nitrogen and …


Georg Cantor And The Battle For Transfinite Set Theory, Joseph Dauben Jan 1993

Georg Cantor And The Battle For Transfinite Set Theory, Joseph Dauben

ACMS Journal 2004

Georg Cantor is well known as the founder of transfinite set theory. Equally celebrated, however, are the obstacles he faced in trying to win acceptance for his seemingly unorthodox views, his acrimonious differences with Leopold Kronecker and his unfortunate but progressively debilitating nervous breakdowns that some authors have linked directly to his many problems with set theory. Above all, Cantor's justification of set theory was all the more urgent because of Kronecker's critical denunciation of Cantor's mathematics. In tracing the evolution of Cantorian set theory, it is necessary to examine the opposition it met, and evaluate the technical, philosophical, psychological, …


Iowa Academy Of Science Directory, 1993-94, Iowa Academy Of Science Jan 1993

Iowa Academy Of Science Directory, 1993-94, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Board of Directors ... 5
Program Directors ... 6
Editors ... 6
Committees ... 8
Sections ... 22
Awards of Merit ... 28
Excellence in Science Teaching Awards ... 29
Past Presidents ... 30
Membership Roster ... 31


Habitat And Distribution Of Plants Special To Iowa's Driftless Area, William P. Pusateri, Dean M. Roosa, Donald R. Farrar Jan 1993

Habitat And Distribution Of Plants Special To Iowa's Driftless Area, William P. Pusateri, Dean M. Roosa, Donald R. Farrar

Journal of the Iowa Academy of Science: JIAS

A portion of the Upper Midwest escaped glaciation during the two most recent glacial epochs. This "Driftless Area", also known in Iowa as the "Paleozoic Plateau", comprises some 39,000 square kilometers (15,000 square miles) in the states of Illinois, Iowa, Minnesota, and Wisconsin. Today the highly dissected terrain provides a variety of habitats supporting a rich and diverse flora including many plants special to the area, i.e., principally, in Iowa, restricted to the Driftless Area. These special plants have received much attention, often having been discussed as possible relicts from past floras. However, distribution data for these species beyond the …


Cover - Table Of Contents Jan 1993

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Front Matter Jan 1993

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Mass Selection For Adaptation In Antigua Maize (Zea Mays L.) Composite, F. M. San Vicente, A. R. Hallauer Jan 1993

Mass Selection For Adaptation In Antigua Maize (Zea Mays L.) Composite, F. M. San Vicente, A. R. Hallauer

Journal of the Iowa Academy of Science: JIAS

Tropical maize (Zea mays L.) germplasm has had limited use in temperate areas because of photoperiod sensitivity. Antigua germplasm from the island Antigua was introduced co Iowa because of its resistance to important pests of maize and its heterosis exposed m crosses with ocher tropical varieties. Mass selection procedures were used to adapt the Antigua Composite germplasm co Iowa conditions. After. Six cycles of mass selection for earlier silk emergence, the selected Antigua Composite flowered 17 days earlier than the original composite. Grain yield and ocher agronomic traits of the adapted scram of Antigua were similar co chose of adapted …


Well-Water Quality Data From A Volunteer Sampling Program: Audubon County, Iowa, L. S. Seigley, G. R. Hallberg, P. R. Walther, G. A. Miller Jan 1993

Well-Water Quality Data From A Volunteer Sampling Program: Audubon County, Iowa, L. S. Seigley, G. R. Hallberg, P. R. Walther, G. A. Miller

Journal of the Iowa Academy of Science: JIAS

This study presents the results of a countywide volunteer sampling of private well-water. Volunteers collected 231 well-water samples in Audubon County for nitrate-nitrogen (NO3,-N) and total coliform bacteria analyses during September 1988. Questionnaires were completed at all sites to document well construction, age and depth of well, well placement relative to septic system, barnyard/feedlots, location of chemical mixing/tank rinsing, and presence of abandoned wells.