Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2000

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 6511 - 6540 of 7451

Full-Text Articles in Entire DC Network

Physicochemical Characteristics And Macroinvertebrate Assemblages Of Riffles Upstream And Downstream Of A Streambank Impacted By Unrestricted Cattle Access, Ronald L. Johnson, Daniel D. Ward, Richard S. Grippo Jan 2000

Physicochemical Characteristics And Macroinvertebrate Assemblages Of Riffles Upstream And Downstream Of A Streambank Impacted By Unrestricted Cattle Access, Ronald L. Johnson, Daniel D. Ward, Richard S. Grippo

Journal of the Arkansas Academy of Science

Riparian zones are important contributors to stream ecosystem health. Alteration of such areas can change stream structure and function, resulting in modified productivity and hydrologic patterns. We studied two riffle sites on the South Fork of the Spring River in Fulton County, AR upstream and downstream of a streambank ostensibly degraded by unrestricted cattle access. The two sites were measured for differences in physical habitat (including bank width, stream velocity, depth, substrate composition, and embeddedness), chemical characteristics (including dissolved oxygen, pH, conductivity, turbidity and total suspended solids) and biological characteristics (including benthic macroinvertebrate community composition, similarity, and standing crop). Measurements …

Go to article

New Arkansas Records For Two Nonindigenous Fish Species, With A Summary Of Previous Introductions Of Nonnative Fishes In Arkansas, Thomas M. Buchanan, Jerry Smith, Diana Saul, Jeff Farwick, Tim Burnley, Mark Oliver, Ken Shirley Jan 2000

New Arkansas Records For Two Nonindigenous Fish Species, With A Summary Of Previous Introductions Of Nonnative Fishes In Arkansas, Thomas M. Buchanan, Jerry Smith, Diana Saul, Jeff Farwick, Tim Burnley, Mark Oliver, Ken Shirley

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Large Pleistocene Box Turtle From Southwest Arkansas, Leo Carson Davis, John G. Scoggins, J. Alan Holman Jan 2000

Large Pleistocene Box Turtle From Southwest Arkansas, Leo Carson Davis, John G. Scoggins, J. Alan Holman

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Curly-Tail Malformity In Hatchlings Of The Alligator Snapping Turtle, Macroclemys Temminckii (Testudines: Chelydridae) In Arkansas, Malcolm L. Mccallum, Stanley E. Trauth Jan 2000

Curly-Tail Malformity In Hatchlings Of The Alligator Snapping Turtle, Macroclemys Temminckii (Testudines: Chelydridae) In Arkansas, Malcolm L. Mccallum, Stanley E. Trauth

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Breeding Mortality In The Wood Frog, Rana Sylvatica (Anura: Ranidae), From Northcentral Arkansas, Stanley E. Trauth, Malcolm L. Mccallum, Michael E. Cartwright Jan 2000

Breeding Mortality In The Wood Frog, Rana Sylvatica (Anura: Ranidae), From Northcentral Arkansas, Stanley E. Trauth, Malcolm L. Mccallum, Michael E. Cartwright

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Home Ranges And Movements Of Adult Deer On Fort Chaffee, Arkansas, Gregory G. Humphreys, Thomas A. Nelson Jan 2000

Home Ranges And Movements Of Adult Deer On Fort Chaffee, Arkansas, Gregory G. Humphreys, Thomas A. Nelson

Journal of the Arkansas Academy of Science

We radio-tracked 27 white-tailed deer (Odocoileus virginianus) weekly for one year on Fort Chaffee, Arkansas, to investigate their seasonal home ranges and movements between hunted areas and refuges on this military base. This work resulted in2,123 separate radiolocations, of which 85% (1,799) were suitable for use in home range analyses. We used the McPAAL computer package to estimate home range using the Harmonic Mean and minimum convex polygon (MCP) methods. Harmonic mean estimates were based on 95% contour lines. Home range size differed between the sexes and methods. Male home ranges were larger than those of females (t= 3.32, P<0.01; harmonic mean) (t=2.07, P<0.05; MCP). Average home range sizes for males and females based on the harmonic mean method were estimated to be 483 ha and 181 ha, respectively, whereas home range estimates for males and females using the MCP method were 636 ha and 289 ha, respectively. The average home range size for all deer was 259 ha (harmonic mean) and 379 ha (MCP). We found no evidence that females restricted their home ranges during the fawning period. However, females' home ranges expanded during the breeding season, perhaps to find mates. Few deer moved to refuge areas that were off-limits to hunters during the hunting season.

Go to article

Winter Breeding As A Common Occurrence In The Ringed Salamander, Ambystoma Annulatum (Caudata: Ambystomatidae), In The Ozark National Forest Of Northcentral Arkansas, Stanley E. Trauth Jan 2000

Winter Breeding As A Common Occurrence In The Ringed Salamander, Ambystoma Annulatum (Caudata: Ambystomatidae), In The Ozark National Forest Of Northcentral Arkansas, Stanley E. Trauth

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Occurrence Of A Second Subspecies Of Box Turtle (Terrapene Carolina), In Arkansas, C. Renn Tumlison, Anthony Rocconi Jan 2000

Occurrence Of A Second Subspecies Of Box Turtle (Terrapene Carolina), In Arkansas, C. Renn Tumlison, Anthony Rocconi

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

3-Hydroxykynurenine And 3-Hydroxyanthranilic Acid Generate Hydrogen Peroxide And Promote Α-Crystallin Cross Linking By Metal Ion Reduction, Lee E. Goldstein, Michael C. Leopold, Xudong Huang, Craig S. Atwood, Aleister J. Saunders, Mariana Hartshorn, James T. Lim, Et Al. Jan 2000

3-Hydroxykynurenine And 3-Hydroxyanthranilic Acid Generate Hydrogen Peroxide And Promote Α-Crystallin Cross Linking By Metal Ion Reduction, Lee E. Goldstein, Michael C. Leopold, Xudong Huang, Craig S. Atwood, Aleister J. Saunders, Mariana Hartshorn, James T. Lim, Et Al.

Chemistry Faculty Publications

The kynurenine pathway catabolite 3-hydroxykynurenine (3HK) and redox-active metals such as copper and iron are implicated in cataractogenesis. Here we investigate the reaction of kynurenine pathway catabolites with copper and iron, as well as interactions with the major lenticular structural proteins, the R-crystallins. The o-aminophenol kynurenine catabolites 3HK and 3-hydroxyanthranilic acid (3HAA) reduced Cu(II)>Fe(III) to Cu(I) and Fe(II), respectively, whereas quinolinic acid and the nonphenolic kynurenine catabolites kynurenine and anthranilic acid did not reduce either metal. Both 3HK and 3HAA generated superoxide and hydrogen peroxide in a copper-dependent manner. In addition, 3HK and 3HAA fostered copper-dependent R-crystallin cross-linking. 3HK- …

Go to article

Vision 2000 Jan 2000

Vision 2000

Vision

No abstract provided.

Go to article

Identification Of Novel Melanoma-Associated Antigens In A Cohort Of Patients Undergoing An Immunotherapeutic Clinical Trial., Brent Rexford Bellows Jan 2000

Identification Of Novel Melanoma-Associated Antigens In A Cohort Of Patients Undergoing An Immunotherapeutic Clinical Trial., Brent Rexford Bellows

All ETDs from UAB

No abstract provided.

Go to article

'Noah's Younger Brother': Anti-Noachic Polemics In 2 Enoch, Andrei Orlov Jan 2000

'Noah's Younger Brother': Anti-Noachic Polemics In 2 Enoch, Andrei Orlov

Theology Faculty Research and Publications

No abstract provided.

Go to article

Some Brief Thoughts (Mostly Negative) About "Bad Samaritan" Laws, Joshua Dressler Jan 2000

Some Brief Thoughts (Mostly Negative) About "Bad Samaritan" Laws, Joshua Dressler

Santa Clara Law Review

No abstract provided.

Go to article

Marijuana As A Schedule I Substance: Political Ploy Or Accepted Science?, Annaliese Smith Jan 2000

Marijuana As A Schedule I Substance: Political Ploy Or Accepted Science?, Annaliese Smith

Santa Clara Law Review

No abstract provided.

Go to article

The Trigger Of Coverage For Cancer: When Does Genetic Mutation Become "Bodily Injury, Sickness, Or Disease"?, Donald T. Ramsey Jan 2000

The Trigger Of Coverage For Cancer: When Does Genetic Mutation Become "Bodily Injury, Sickness, Or Disease"?, Donald T. Ramsey

Santa Clara Law Review

No abstract provided.

Go to article

The Human Genome Diversity Project And The New Biological Imperialism, Cindy Hamilton Jan 2000

The Human Genome Diversity Project And The New Biological Imperialism, Cindy Hamilton

Santa Clara Law Review

No abstract provided.

Go to article

The Empirical Shortcomings Of First Amendment Jurisprudence: A Historical Perspective On The Power Of Hate Speech, Alexander Tsesis Jan 2000

The Empirical Shortcomings Of First Amendment Jurisprudence: A Historical Perspective On The Power Of Hate Speech, Alexander Tsesis

Santa Clara Law Review

No abstract provided.

Go to article

Exploring And Exploiting Models Of The Fitness Landscape: A Case Against Evolutionary Optimization, Jonathan Paul Moore Jan 2000

Exploring And Exploiting Models Of The Fitness Landscape: A Case Against Evolutionary Optimization, Jonathan Paul Moore

School of Engineering, Computing and Mathematics Theses

In recent years, the theories of natural selection and biological evolution have proved popular metaphors for understanding and solving optimization problems in engineering design. This thesis identifies some fundamental problems associated with this use of such metaphors. Key objections are the failure of evolutionary optimization techniques to represent explicitly the goal of the optimization process, and poor use of knowledge developed during the process. It is also suggested that convergent behaviour of an optimization algorithm is an undesirable quality if the algorithm is to be applied to multimodal problems. An alternative approach to optimization is suggested, based on the explicit …

Go to article

Evolutionary Decomposition Of Complex Design Spaces, Christopher Richard Bonham Jan 2000

Evolutionary Decomposition Of Complex Design Spaces, Christopher Richard Bonham

School of Engineering, Computing and Mathematics Theses

This dissertation investigates the support of conceptual engineering design through the decomposition of multi-dimensional search spaces into regions of high performance. Such decomposition helps the designer identify optimal design directions by the elimination of infeasible or undesirable regions within the search space. Moreover, high levels of interaction between the designer and the model increases overall domain knowledge and significantly reduces uncertainty relating to the design task at hand. The aim of the research is to develop the archetypal Cluster Oriented Genetic Algorithm (COGA) which achieves search space decomposition by using variable mutation (vmCOGA) to promote diverse search and an Adaptive …

Go to article

The Systemic Redesign Of Manufacturing Systems In Small To Medium Sized Enterprises, John William George Bradford Jan 2000

The Systemic Redesign Of Manufacturing Systems In Small To Medium Sized Enterprises, John William George Bradford

School of Engineering, Computing and Mathematics Theses

The research problem was to develop a new approach for redesigning manufacturing systems within Small to Medium sized Enterprises (SMEs). Field observation together with literature review showed that methodologies propounded in theory were not being applied in practice. The research presents a new methodology for the systemic redesign of manufacturing systems within SMEs. The methodology consists of a four phase iterative design strategy consisting of Planning, Risk Assessment, Action and Evaluation leading to the next Planning phase. This is given a systemic basis through four perspectives: Structure; People; Process; and Technology; which frame and guide the Planning phase. Prior to …

Go to article

Paradoxical Interventions With Severe Conduct-Disordered Adolescents: Research Of Treatment Effectiveness., Marsha Anne Mills Jan 2000

Paradoxical Interventions With Severe Conduct-Disordered Adolescents: Research Of Treatment Effectiveness., Marsha Anne Mills

Graduate Theses, Dissertations, and Problem Reports (ETD)

Paradoxical interventions are therapeutic techniques in which the therapist appears to promote the worsening or continuation of the problem rather than its removal. The objective of this treatment is to lessen or eliminate the problematic behavior through the unusual means of encouraging it. Only two previous studies have empirically evaluated these techniques with resistant and defiant youths; those results suggested that paradoxical interventions may be effective with severely conduct-disordered adolescents. This study applied the techniques of symptom scheduling and restraining with three conduct-disordered adolescents residing in a therapeutic group home. The experimental design was a nonconcurrent multiple baseline across participants; …

Go to article

Study Of Human Head Impact: Brain Tissue Constitutive Models., Toru Aida Jan 2000

Study Of Human Head Impact: Brain Tissue Constitutive Models., Toru Aida

Graduate Theses, Dissertations, and Problem Reports (ETD)

Finite element (FE) models of the human head have been used extensively to assess engineering response parameters (pressure, shear strain, etc.) that constitute the basis of various injury criteria including the Head Injury Criterion (HIC). There is a wide range of brain material properties reported in the literature, and linear elastic models are frequently used for the brain tissue which is viscoelastic in nature. The uncertainty around the properties of brain tissue affects the perceived importance of those response parameters under consideration. In this research, the effect on head injury criteria of five reported viscoelastic brain models and their linear …

Go to article

La Banque De France, Une Des Grandes Institutions Napoleoniennes, Alain Plessis Jan 2000

La Banque De France, Une Des Grandes Institutions Napoleoniennes, Alain Plessis

Documents

No abstract provided.

Go to article

Benefits Of The West Virginia School For The Deaf Horticulture Program To Past Graduates, 1984-1997., Edgar Aldine Leatherman Iii Jan 2000

Benefits Of The West Virginia School For The Deaf Horticulture Program To Past Graduates, 1984-1997., Edgar Aldine Leatherman Iii

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of the study was to assess the WVSD horticulture program in relation to the value of the technical and leadership skills it imparts as perceived by past WVSD horticultural graduates. The study focused on three questions related to the employability of the 41 graduates of the years 1984-1997 and their use of the skills learned through the horticulture program and FFA organization. Data were obtained from 29 of the 41 graduates through mail questionnaires and personal interviews. As a result of this study the following items of importance were found: 69% of the graduates were presently employed, another …

Go to article

The Relationships Between Snags And Cavity-Nesting Birds In A Gypsy Moth-Impacted Forest., Christopher Ryan Showalter Jan 2000

The Relationships Between Snags And Cavity-Nesting Birds In A Gypsy Moth-Impacted Forest., Christopher Ryan Showalter

Graduate Theses, Dissertations, and Problem Reports (ETD)

Gypsy moth defoliation can result in the death of trees and create snags (standing dead trees), a resource vital to cavity-nesting species. With this in mind, population trends of 11 cavity-nesting birds and their relationship to snags were investigated from 1984 to 1999 in an area that was impacted by gypsy moth defoliation. Data from before a major gypsy moth outbreak (1984-1986), during (1987-1988), and after (1989-1999) enabled inferences about this forest bird community to be made. The combined abundance of the 11 cavity-nesting species examined increased significantly during the years immediately after the outbreak (1989 – 1993) followed by …

Go to article

The Effects On Student's Personality Preferences From Participation In Odyssey Of The Mind., Scott A. Warner Jan 2000

The Effects On Student's Personality Preferences From Participation In Odyssey Of The Mind., Scott A. Warner

Graduate Theses, Dissertations, and Problem Reports (ETD)

The problem for the research was to determine what effects participation in the OM program had on the development of personality preferences in elementary school children. The purposes of the research were to: (1) provide research data to teachers that justifies the use of teaching strategies to meet the needs of students toward the development of their personality preferences, and (2) provide research data toward further investigation of inventive personality characteristics and the programs that encourage their growth and development. The subjects for the study were selected from students in grades 3 to 5 at two elementary schools within the …

Go to article

Factors Affecting The Recruitment Of Riparian Vegetation On The Ord And Blackwood Rivers In Western Australia, Neil Pettit Jan 2000

Factors Affecting The Recruitment Of Riparian Vegetation On The Ord And Blackwood Rivers In Western Australia, Neil Pettit

Theses: Doctorates and Masters

This thesis provides baseline information on the ecological processes involved in the recruitment and regeneration of riparian vegetation. As there has been a paucity of basic ecological studies on riparian vegetation in Australia, the project is broad in scope, and gives a general picture of the factors influencing, the regeneration of riparian vegetation and provides a starting point for more detailed work. The project focuses on factors determining recruitment events and the life history traits of particular species in a river in the cool temperate zone of south western Australia (Blackwood River) and on a river in the dry tropics …

Go to article

Shamanism And Alien Abductions : A Comparative Study, Simon Brian Harvey-Wilson Jan 2000

Shamanism And Alien Abductions : A Comparative Study, Simon Brian Harvey-Wilson

Theses: Doctorates and Masters

Some UFO researchers (ufologists) claim that being abducted by aliens can be compared with shamanic initiation experiences in traditional societies in that both types of experience may be similarly transformative, leading to a more spiritual or animistic world-view, a deep concern for the environment and the development of paranormal abilities such as healing. This qualitative study is designed to investigate the validity of such claims. The research aim is to see whether the experiences and subsequent world-view of eleven alien abductees (eight women and three men) from a local abduction support group are similar to those of the typical shaman …

Go to article

A Study Of The Adjustment Problems Experienced By Workers Undertaking Short Term International Relocation, Carla Fedora Sharp-Paul Jan 2000

A Study Of The Adjustment Problems Experienced By Workers Undertaking Short Term International Relocation, Carla Fedora Sharp-Paul

Theses: Doctorates and Masters

This study focused on the adjustment problems created by the effects of living and working in a culturally unfamiliar environment. Sixty-five internationally relocated workers, both male and female aged between 30 and 60 years, from different countries, who were on short-term relocation to Singapore, were asked to complete a survey. This survey questionnaire consisted of 56 questions, about the adjustment problems that they faced while on relocation and the availability or non-availability of pre-departure training. The conceptual framework for this study was developed by referring to difficulties uncovered in the literature review on the topic of international relocation. Questionnaire items …

Go to article

Drama Praxis : Rural Arts Workers And Lifelong Learning : A Phenomenological Study, Susan E. Gibson Jan 2000

Drama Praxis : Rural Arts Workers And Lifelong Learning : A Phenomenological Study, Susan E. Gibson

Theses: Doctorates and Masters

The purpose of this study is to explore and describe the experiences of a specific group of arts workers in an isolated rural community in the South West of Western Australia. These participants have all worked in the community as arts workers for an extended period of time. Through phenomenological research, the telling of these workers stories, it is anticipated that the research will highlight, strengthen and enrich the political and economic positions of these workers. The study is based on the assumptions and pre-conceptions that geographical and cultural isolation contributes to significant problems and situations such as communication that …

Go to article

First Prev Next Last