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Articles 16561 - 16590 of 22966

Full-Text Articles in Social and Behavioral Sciences

Awards And Recognition, Iowa Academy Of Science, 1999 Jan 1999

Awards And Recognition, Iowa Academy Of Science, 1999

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Behavioral Effects Of Psychomotor Stimulant Infusions Into Amygdaloid Nuclei., Laura O'Dell Jan 1999

Behavioral Effects Of Psychomotor Stimulant Infusions Into Amygdaloid Nuclei., Laura O'Dell

Selected Works Temporary Series

No abstract provided.


Serotonin2c Receptors Appear To Mediate Genetic Sensitivity To Cocaine-Induced Convulsions, Laura O'Dell Jan 1999

Serotonin2c Receptors Appear To Mediate Genetic Sensitivity To Cocaine-Induced Convulsions, Laura O'Dell

Selected Works Temporary Series

No abstract provided.


Behavioral Interactions And Conflict Among Domestic Dogs, Black-Tailed Prairie Dogs, And People In Boulder, Colorado, Marc Bekoff, Robert W. Ickes Jan 1999

Behavioral Interactions And Conflict Among Domestic Dogs, Black-Tailed Prairie Dogs, And People In Boulder, Colorado, Marc Bekoff, Robert W. Ickes

Ethology Collection

Interactions among domestic dogs (Canis familiaris), black-tailed prairie dogs (Cynomys ludovicianus), and people were studied at Dry Creek, Boulder, Colorado. Our objective was to develop a basic understanding of the nature of dog–prairie dog interactions in this recreational area, because this is an issue that has high visibility and over which there is conflict in Boulder: There are those who want dogs to run free regardless of their impact on the behavior and lives of prairie dogs and those who want to protect prairie dogs and have dogs restrained or go elsewhere. We found that dogs clearly influenced the behavior …


Research Fundamentals: V. The Use Of Laboratory Animal Models In Research, Brian J. O'Neil, Jeffrey A. Kline, Keith Burkhart, John Younger Jan 1999

Research Fundamentals: V. The Use Of Laboratory Animal Models In Research, Brian J. O'Neil, Jeffrey A. Kline, Keith Burkhart, John Younger

Biomedicine and Animal Models in Research Collection

Animal research has provided important information about many aspects of the pathophysiology of human disease. Well-performed animal studies can determine the potential benefit of many proposed therapeutic interventions, and experimental results from animal studies have served as the basis for many landmark clinical trials. Many animal research models are described in the research literature, and choosing the appropriate model to answer a research question can be a daunting task. Even more challenging is developing a new model when none of the existing systems are relevant to the proposed question. This article was prepared by members of the SAEM Research Committee …


Comparing Three Bee Species For Controlled Pollination Of Selected Brassicaceae, R. L. Wilson, C. A. Abel, R. L. Luhman Jan 1999

Comparing Three Bee Species For Controlled Pollination Of Selected Brassicaceae, R. L. Wilson, C. A. Abel, R. L. Luhman

Journal of the Iowa Academy of Science: JIAS

Pollination of species of Brassicaceae for seed increase at the USDA-ARS North Central Regional Plant Introduction Station (NCRPIS) has been accomplished for several years by using nucleus hives of honey bees, Apis mellifera L., in field cages. Brassicaceae are cool season crops that need pollination from late April to early June in the north temperate zone. Overwintered hives of honey bees need time to strengthen (i.e., increase their numbers) and thus it is difficult to make enough nuclei to meet our early season pollinations needs. Purchasmg package bees from suppliers in the southern U.S. is an expensive alternative. In this …


Editorial Board & Iowa Academy Of Science Officers And Directors Jan 1999

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Cover - Table Of Contents Jan 1999

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Distribution And Persistence Of Phyllachora Species On Poaceae In Iowa, A. C. Gabel, L. H. Tiffany Jan 1999

Distribution And Persistence Of Phyllachora Species On Poaceae In Iowa, A. C. Gabel, L. H. Tiffany

Journal of the Iowa Academy of Science: JIAS

Phytlachora spp. on Poaceae were collected to determine species present, grass hosts and distribution in Iowa. From 1959-1996 the fungus was collected 240 times from 67 different sites in 35 counties. Seven species of Phytlachora were collected on 25 species from 13 genera of grasses. P. graminis was collected 89 times from 43 sites on four species of Agropyron, two species of Calamagrostis, three species of Elymus, Hystrix patula, Panicum virgatum, and Setaria glauca. Seventy-two specimens of P. luteo-maculata on Andropogon gerardii or Schiziichyrium scoparium were collected from 30 sites. The study included 20 collections of P. cynodontis on Bouteloua …


Characterization Of Central Iowa Forests With Permanent Plots, James W. Raich, Donald R. Farrar, Ruth A. Herzberg, Eenam Sin, Cindy L. Johnson-Groh Jan 1999

Characterization Of Central Iowa Forests With Permanent Plots, James W. Raich, Donald R. Farrar, Ruth A. Herzberg, Eenam Sin, Cindy L. Johnson-Groh

Journal of the Iowa Academy of Science: JIAS

We describe a standard methodology for establishing and inventorying the woody vegetation in 0.1-ha permanent forest plots and we utilize the data from 86 plots to characterize the mature forest vegetation of central Iowa. Obvious differences existed between bottomland hardwoods and upland forest stands, but disturbed uplands contained species typical of bottomlands. Little-disturbed upland forest plots included a variety of species associations, but variation among plots was continuous. The trees dominating the mature upland forests of central Iowa grow in a wide variety of habitats, with the result that predictability of stand structure at any location is limited. Stands on …


Cover - Table Of Contents Jan 1999

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Index For Volume 106 Jan 1999

Index For Volume 106

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Santa Clara Magazine, Volume 41 Number 3, Winter 1999, Santa Clara University Jan 1999

Santa Clara Magazine, Volume 41 Number 3, Winter 1999, Santa Clara University

Santa Clara Magazine

8 - NOT WITH MY DAUGHTER, YOU DON'T! By Susan Fry. An SCU psychologist explores the correlation between dating and self-esteem for adolescent girls.

12 - COMMON GROUND FOUND By Tamara Straus. SCU has a new partner: the Smithsonian Center for Mate rials Research and Education. Together they are pursuing what a top-notch 21st-century education will require.

16 - THE NEW VOICES OF SANTA CLARA By Nichole Pichel, Miguel Legarreta, Charlene Abalos, Audrey Bilczo, and Jennifer Farris. Five incoming students share their experience of building values in a world of uneven prosperity, opportunity, and choice.


Alpha Status, Dominance, And Division Of Labor In Wolf Packs, L. David Mech Jan 1999

Alpha Status, Dominance, And Division Of Labor In Wolf Packs, L. David Mech

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

The prevailing view of a wolf (Canis lupus) pack is that of a group of individuals ever vying for dominance but held in check by the “alpha” pair, the alpha male and alpha female. Most research on the social dynamics of wolf packs, however, has been conducted on non-natural assortments of captive wolves. Here I describe the wolf-pack social order as it occurs in nature, discuss the alpha concept and social dominance and submission, and present data on the precise relationships among members in free-living packs, based on a literature review and 13 summers of observations of wolves …


Behavioral Effects Of Psychomotor Stimulant Infusions Into Amygdaloid Nuclei., Laura O'Dell Jan 1999

Behavioral Effects Of Psychomotor Stimulant Infusions Into Amygdaloid Nuclei., Laura O'Dell

Departmental Papers (Psych)

No abstract provided.


Serotonin2c Receptors Appear To Mediate Genetic Sensitivity To Cocaine-Induced Convulsions, Laura O'Dell Jan 1999

Serotonin2c Receptors Appear To Mediate Genetic Sensitivity To Cocaine-Induced Convulsions, Laura O'Dell

Departmental Papers (Psych)

No abstract provided.


Chlorophyll Meter Assessments Of Corn Response To Nitrogen Management Practices, M. M. Siambi, D. L. Karlen, R. M. Shibles Jan 1999

Chlorophyll Meter Assessments Of Corn Response To Nitrogen Management Practices, M. M. Siambi, D. L. Karlen, R. M. Shibles

Journal of the Iowa Academy of Science: JIAS

Environmentally sound nitrogen (N) management is necessary to simultaneously achieve high crop yields and protect surface and groundwater quality. We evaluated a hand-held chlorophyll meter as a diagnostic tool for improving management for corn (Zea mays L.). Five N fertilizer rates (0, 67, 134, 201 and 280 kg N ha-1) were evaluated in one study, and in a second study, the meter was used to evaluate the N status of corn plants grown under varying tillage (chisel plow vs no-till), crop rotation (continuous corn vs corn-soybean [Glycine max (L.) Merr.]), and N management treatments. Meter readings were …


Multivalued Mappings, Fixed-Point Theorems And Disjunctive Databases, Pascal Hitzler, Anthony K. Seda Jan 1999

Multivalued Mappings, Fixed-Point Theorems And Disjunctive Databases, Pascal Hitzler, Anthony K. Seda

Computer Science and Engineering Faculty Publications

In this paper, we discuss the semantics of disjunctive programs and databases and show how multivalued mappings and their fixed points arise naturally within this context. A number of fixed-point theorems for multivalued mappings are considered, some of which are already known and some of which are new. The notion of a normal derivative of a disjunctive program is introduced. Normal derivatives are normal logic programs which are determined by the disjunctive program. Thus, the well-known single-step operator associated with a normal derivative is single-valued, and its fixed points can be found by well-established means. It is shown how fixed …


The Arctic And Antarctic: An Integrated Curriculum Unit, Grades K-2, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver Jan 1999

The Arctic And Antarctic: An Integrated Curriculum Unit, Grades K-2, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver

Ricks Curriculum Units Series

An integrated curriculum is an instructional approach that connects the disciplines to an underlying theme or topic. Immersing students in an integrated-thematic unit provides the backdrop for experiences to occur across the disciplines. Shaping coursework around integrated themes is especially appropriate for gifted students, however using an integrated-thematic curriculum is appropriate for all learners as it develops students' abilities to make connections, to solve problems by looking at multiple perspectives, and to integrate information from different fields of experience. An integrated-thematic curriculum permits students to be active participants in their own learning as they design their own explorations and take …


Front Matter Jan 1999

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Back Cover Jan 1999

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Back Cover Jan 1999

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Book Review: Places Of Quiet Beauty: Parks, Preserves, And Environmentalism, Cornelia F. Mutel Jan 1999

Book Review: Places Of Quiet Beauty: Parks, Preserves, And Environmentalism, Cornelia F. Mutel

Journal of the Iowa Academy of Science: JIAS

Places of Quiet Beauty: Parks, Preserves, and Environmentalism. Rebecca Conard. 1997. University of Iowa Press, Iowa City, Iowa. XV + 382 pages. ISBN 0-87745-558-9.

Well administered, parks become much more than havens for birds and flowers, much more than game-preserves, a refuge for life of every sort; even more than a play-ground for all the people ... [The well administered park] shall show us real democracy.

So began one of Iowa's preeminent natural historians, Thomas Macbride, in an early-20th-century (1922) address on the status of Iowa's parks. And so Rebecca Conard begins her late-20th-century analysis of the development of Iowa's …


Africa: An Integrated Curriculum Unit, Grades 2-4, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver Jan 1999

Africa: An Integrated Curriculum Unit, Grades 2-4, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver

Ricks Curriculum Units Series

An integrated curriculum is an instructional approach that connects the disciplines to an underlying theme or topic. Immersing students in an integrated-thematic unit provides the backdrop for experiences to occur across the disciplines. Shaping coursework around integrated themes is especially appropriate for gifted students, however using an integrated-thematic curriculum is appropriate for all learners as it develops students' abilities to make connections, to solve problems by looking at multiple perspectives, and to integrate information from different fields of experience. An integrated-thematic curriculum permits students to be active participants in their own learning as they design their own explorations and take …


Pqf News: Newsletter Of The Partridge, Quail, And Francolin Specialist Group 13/14-19 (1999-2003), Iucn Species Survival Commission, Birdlife International, World Pheasant Association Jan 1999

Pqf News: Newsletter Of The Partridge, Quail, And Francolin Specialist Group 13/14-19 (1999-2003), Iucn Species Survival Commission, Birdlife International, World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

The purpose of the newsletter is to receive details of new projects, re-assessments of the status of relevant species, interesting discoveries or observations, taxonomic changes, conservation successes or threats and anything else that members might find interesting. We would like in future issues to produce a list of relevant publications which appear during the year in order to keep members up-to-date with current information. We will publish requests for contacts or information, advertisements for conferences and workshops and news of projects and project proposals.

Issue 13/14 (Spring/Autumn 1999)

Action Plan revision: A progress report, Richard Fuller

First nest records for …


Cover - Table Of Contents Jan 1999

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


Planting Method And Fertilization Timing Effects On Ridge-Till Corn, Keith A. Kohler, Mohammadreza Ghaffarzadeh, Richard M. Cruse Jan 1999

Planting Method And Fertilization Timing Effects On Ridge-Till Corn, Keith A. Kohler, Mohammadreza Ghaffarzadeh, Richard M. Cruse

Journal of the Iowa Academy of Science: JIAS

Fertilizer application technology has improved fertilizer use efficiency in ridge-till systems, but little work on planting methods and application timing within these systems has been done. A study was conducted to evaluate corn (Zea mays 1.) response to injected nitrogen (N) fertilizer applied to different planting methods at common application times. The performance of the late spring soil nitrate and the basal stalk nitrate tests was examined within these systems. A continuous corn and a corn-soybean [Glycine max (1) Merr.] rotation were used in 1989-1991 at two Iowa locations on Nicolett and Monona series soils, line-loamy, mixed, mesic Typic …


Cover - Table Of Contents Jan 1999

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.


The Species Richness Of Birds Visiting A Yard Is Influenced By The Feeders/Seeds Present, David Joseph Horn Jan 1999

The Species Richness Of Birds Visiting A Yard Is Influenced By The Feeders/Seeds Present, David Joseph Horn

Journal of the Iowa Academy of Science: JIAS

Although seed preferences of species that visit bird feeders have been well documented, we know little about feeder/seed combinations most appropriate for attracting highest species richness or increasing abundance of individual species. I studied how the species composition of birds visiting a feeding station was influenced by addition of feeders filled with mixed seed, thistle, and suet in a yard that previously contained only a feeder with sunflower seeds. Addition of a seed mixture consisting of hulled sunflower, hulled peanuts, hulled millet, and hulled "tree" nuts in an elevated platform feeder increased species richness and total number of birds visiting …


The Vascular Flora Of Doolittle Prairie State Preserve - A Prairie Pothole Wetland Complex, Paul R. Wetzel, William R. Norris, Kevin M. Lyles Jan 1999

The Vascular Flora Of Doolittle Prairie State Preserve - A Prairie Pothole Wetland Complex, Paul R. Wetzel, William R. Norris, Kevin M. Lyles

Journal of the Iowa Academy of Science: JIAS

Doolittle Prairie State Preserve is a 10 ha prairie pothole wetland complex located in Story County, central Iowa. A vascular flora of Doolittle Prairie is compiled and the prominent vegetation communities and zones described based on field observations by the authors and several additional investigators from 1982 to 1997. The preserve contains 14 shallow wetlands comprised of low prairie, wet meadow, and shallow emergent plant communities, as well as a disturbed prairie community and fence rows. These communities support a diverse vascular flora of 223 native species, plus 42 non-natives, representing 59 families and 178 genera. The Asteraceae (40), Poaceae …