Science and Mathematics Education Commons^™

Student Explorations Of Quantum Effects In Leds And Luninescent Devices, Lawrence Escalada, N. Sanjay Rebekki, Dean A. Zollman

Faculty Work

We developed activity-based instructional units to introduce basic quantum principles to students with limited physics and mathematics backgrounds. To emphasize the practical applications of contemporary physics, we introduced concepts using the contexts of light-emitting devices such as light-emitting diodes (LEDs), fluorescent lamps, and glow-in-the-dark toys. As our standard of living becomes more dependent on the latest developments in science and technology, our students' literacy must be at a level that enables them to make educated decisions on science- and technology-related issues and their everyday applications. Students need to have at least a basic understanding of 20th-century physics and its applications …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Iowa Academy Of Science 116th Annual Meeting [2004]: Advance Program, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

116th Annual Meeting Of The Iowa Academy Of Science [Program, 2004], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Notes Page --- 3
Friday Program Summary --- 4
Senior Academy Poster Presentation Titles --- 5
General Session Speakers --- 7
Symposia Programs --- 8
Saturday Program Summary --- 9
Section Meeting Programs (Alphabetical by Section) --- 9
2004 Awards --- 14
Abstracts (by Section) --- 15
Author Index --- 42

Flow Cytometry Used To Assess Genetic Damage In Frogs From Farm Ponds, Bartholomew L. Bly, Melinda G. Knutson, Mark B. Sandheinrich, Brian R. Gray, Dean A. Jobe

Journal of the Iowa Academy of Science: JIAS

Flow cytometry (FC) is a laboratory method used to detect genetic damage induced by environmental contaminants and other stressors in animals, including amphibians. We tested FC methods on three species of ranid frogs collected from farm ponds and natural wetlands in southeastern Minnesota. We compared FC metrics for Rana clamitans between ponds with direct exposure to agricultural contaminants and reference (unexposed) ponds. Concentrations of atrazine in water from our farm ponds ranged from 0.04 to 0.55 ppb. We found that R. clamitans from exposed ponds had DNA content similar to frogs from unexposed ponds. Pond-averaged C-values (a measure of DNA …

Index For The Journal Of The Iowa Academy Of Science Volume 111

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Plant Parasitic Fungi Of Ten Tallgrass Prairies Of Iowa: Distribution And Prevalence, Lois H. Tiffany, George Knaphus

Journal of the Iowa Academy of Science: JIAS

During the 1980s and 1990s, collections of fungal parasites on above ground parts of prairie plants in Iowa were made throughout the growing seasons. This report presents the fungi recorded from three groups of Iowa tallgrass prairies. The western group was composed of Dinesen, Steele and Stinson Prairie State Preserves, a Loess Hills group of collecting sites in Five Ridge and Runkel Prairie State Preserves and prairies at Waubonsie State Park. 180 species of fungi were collected on 116 hosts from these prairies. A central Iowa group of prairies associated with the Des Moines Lobe landform, Anderson, Doolittle, Kalsow and …

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

A Comparison Of Drinking Water Contamination In Buried Slab Wells, Other Large-Diameter Wells, And Drilled Wells, Rita M. Gergely

Journal of the Iowa Academy of Science: JIAS

This study presents the results of a statewide water well survey conducted by the Iowa Department of Public Health from 1993 to 1995 to determine whether there were statistically significant differences between well water contamination in buried slab wells, other large-diameter wells, and drilled wells. Wells were sampled for total coliform bacteria, fecal coliform bacteria, nitrate, and atrazine. Staff collected water samples and completed a site survey at each well, which included an interview with the occupant or owner and actual observations of the wellhead and surrounding area.

The study included 293 buried slab wells, 287 other large-diameter wells, and …

Biomass Yield Stability In Alfalfa, Joseph G. Robins, Heathcliffe Riday, Sara J. Helland, E. Charles Brummer

Journal of the Iowa Academy of Science: JIAS

In addition to biomass production, alfalfa (Medicago sativa) cultivars also need to express yield stability across diverse environments. The objective of this experiment was to analyze the nature of biomass yield stability in ten commercial alfalfa cultivars by evaluating performance of individual genotypes. Biomass yield was measured in each of five environments across two years, and the yield stability computed for the overall cultivar mean performance and the mean performance of each of the genotypes comprising the cultivars using the genotype x environment variance statistic of Shukla and the superiority statistic of Lin and Binns'. The GxE variance of the …

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

The Freshwater Mussels (Mollusca: Bivalvia: Unionidae) Of The Boone River, North Central Iowa, Ellet Hoke

Journal of the Iowa Academy of Science: JIAS

A survey of the freshwater mussels of the Boone River conducted in September 1982 documented a fauna consisting of seventeen then extant or relict species. Analysis of museum records yielded one additional species unrecovered since 1937. Subsequent to the 1982 study, additional surveys were conducted in the region in 1984-1985 and 1998-1999 as a part of two statewide surveys. A comparison of the results of the three studies suggests a significant decline in the unionid fauna in the Boone River since 1982. While it is almost certain that a real decline in the fauna has occurred, the extent of this …

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

The Impact Of White Pine (Pinus Strobus) On A Mollisol After Seven Decades Of Soil Development, Irina Kovda, Eric C. Brevik, Thomas E. Fenton, Maria Gerasimova

Journal of the Iowa Academy of Science: JIAS

Selected chemical, physical, and macro and micromorphological properties in two pedons of a Clarion soil (Fine-loamy, mixed, superactive, mesic Typic Hapludolls) formed in till parent material, one planted to white pines (Pinus strobus) for the past 75 years and the other to grass, were compared. The most obvious difference between the two was the increased biological activity under pines; the variety and quantity of excrements suggested the activity of soil microfauna and variability of species resulted in finer and better aggregation of biological origin (crumbs and granules), numerous excrements in voids, and higher total porosity under pines. The matrix was …

Integrating Technology To Facilitate Math Instruction In The Elementary Classroom, Terri Schmidt

Graduate Research Papers

Integrating technology throughout the elementary curriculum is a topic that concerns educators. This paper informs educators as to why they should explore the implementation of technology into the math curriculum in the elementary classroom. This paper discusses brain-based learning, how to use brain-based learning techniques as well as the computer to integrate math and the benefits of using the computer in the math classroom throughout the day in the elementary classroom.

From Ltoj : The Effects Of An Assessment Approach On Student Achievement In Mathematics At The Middle School Level, Toni Andersen

Graduate Research Papers

This study investigated the effectiveness of the assessment approach From LtoJ as applied to the development of procedural skills and conceptual understandings in mathematics at the eighth grade level. The focal question of this study was: Does the literature support the assessment process used in the From LtoJ program? The information was gathered from approximately one hundred students taking pre-algebra in a three-year span. The curriculum database focused on the essential information a student must acquire in the areas of curriculum vocabulary and concepts, as well as their computational ability with fractions. Each week, random items were selected from the …

The Impact Of The Iowa Children's Water Festival On The Children's Attitudes And Behaviors Toward The Environment, Sang-Min Kim

Dissertations and Theses @ UNI

As a result of the growing concern about environmental issues, many countries have developed mechanisms and regulations directed at protection and conservation of the environment. As a part of this movement, many governmental and nongovernmental organizations (NGO) have launched a variety of environmental education programs, in an attempt to promote awareness of environmental issues. The Iowa Children’s Water Festival (ICWF) is an annual half-day environmental education program in Iowa. The goal of the ICWF is to provide educational opportunities throughout the state to K-5 children and to educate customers of tomorrow on the importance of safe, reliable drinking water (ICWF, …

115th Session Iowa Academy Of Science Awards Luncheon, April 25, 2003, Iowa Academy Of Science

Iowa Academy of Science Documents

Program:

--- Introductions - Raymond Anderson, President
--- Recognition of students participating in various statewide activities - Ernie Schiller, Chair, Student Programs Committee
--- Presentation of scholarship winners and 2004 AJAS representatives - Ernie Schiller, Chair, Student Programs Committee
--- Presentation of Excellence in Science Teaching Awards - Jeff Weld, Director, ESTA Program

Index For The Journal Of The Iowa Academy Of Science Volume 110 And Change Of Editor

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Checklist Of Instructions For Authors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Awards And Recognition, Iowa Academy Of Science, 2003

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Iowa Academy Of Science Membership Directory, 2003-2004, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Editorial Board, Journal ... 4
Committees ... 6
Sections ... 14
ISTS Regional Directors ... 19
Awards of Merit ... 21
Excellence in Science Teaching Awards ... 22
Past Presidents ... 23
Membership Roster ... 24
Institutional Members ... 25
Corporate Sponsors ... 25

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Restoration And Monitoring Of The River Otter Population In Iowa, J. A. Pitt, W. R. Clark, R. D. Andrews, K. P. Schlarbaum, D. D. Hoffman, S. W. Pitt

Journal of the Iowa Academy of Science: JIAS

Northern river otters (Lontra canadensis) were widespread in North America at the time of European settlement. However, river otters were extirpated from most of Iowa in the early 1900s due to habitat degradation and unregulated harvest. In 1985, the Iowa Department of Natural Resources began an effort to restore the river otter population throughout the state, including a pilot study of survival to determine if establishment was feasible. Annual survival was estimated to be 86% during the pilot study. River otters dispersed an average of about 11 km from the point of release and exhibited habitat use typical for the …