Open Access. Powered by Scholars. Published by Universities.®
Social and Behavioral Sciences Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- Selected Works (3368)
- University of Colorado Law School (1258)
- University of Wollongong (1157)
- Wayne State University (1116)
- Singapore Management University (774)
-
- University of Northern Iowa (737)
- University of Nebraska - Lincoln (697)
- Wright State University (694)
- University of Nevada, Las Vegas (596)
- Old Dominion University (593)
- Embry-Riddle Aeronautical University (572)
- Loyola Marymount University and Loyola Law School (463)
- SIT Graduate Institute/SIT Study Abroad (451)
- Western Kentucky University (440)
- SelectedWorks (433)
- University of Dayton (407)
- The University of Maine (396)
- Universitas Indonesia (341)
- World Maritime University (338)
- Portland State University (304)
- University of Vermont (279)
- Santa Clara University (274)
- University of Arkansas, Fayetteville (273)
- Chinese Academy of Sciences (256)
- California State University, Monterey Bay (253)
- Claremont Colleges (240)
- SUNY College Cortland (238)
- Western Washington University (233)
- University of New Hampshire (207)
- City University of New York (CUNY) (205)
- Keyword
-
- Climate change (449)
- United States (429)
- CMMB (416)
- Stander Symposium project (371)
- Sustainability (352)
-
- Agriculture (318)
- GeoQUEST (305)
- Colorado (264)
- Natural resources (249)
- Western Kentucky University (237)
- California (235)
- Ecology (232)
- Outdoor education (231)
- Environment (226)
- Conservation (220)
- Water (178)
- Resilient Communities (177)
- Australia (168)
- Environmental Studies (167)
- Historical resources (167)
- Early California maps (166)
- West (162)
- California Ranchos (161)
- GIS (161)
- Monterey County surveys (161)
- Education (157)
- Water quality (157)
- Student publication (152)
- Machine learning (143)
- Climate (139)
- Publication Year
- Publication
-
- Faculty of Science - Papers (Archive) (1143)
- Journal of Modern Applied Statistical Methods (1088)
- Journal of the Iowa Academy of Science: JIAS (693)
- Research Collection School Of Computing and Information Systems (586)
- Kno.e.sis Publications (541)
-
- Independent Study Project (ISP) Collection (426)
- Daryl Bagley (374)
- Stander Symposium Projects (371)
- Kesmas (313)
- Journal of Digital Forensics, Security and Law (300)
- Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298 (266)
- Bulletin of Chinese Academy of Sciences (Chinese Version) (256)
- World Maritime University Dissertations (241)
- Research in Outdoor Education (231)
- Electronic Theses and Dissertations (206)
- WKU Administration Documents (194)
- Annual ADFSL Conference on Digital Forensics, Security and Law (188)
- RISK: Health, Safety & Environment (1990-2002) (166)
- Township and Range Surveys - BLM (162)
- Journal of Spatial Information Science (144)
- Theses and Dissertations (143)
- USF Tampa Graduate Theses and Dissertations (143)
- The Planet (140)
- Graduate Theses and Dissertations (138)
- Santa Clara Magazine (138)
- Walden Dissertations and Doctoral Studies (133)
- kutil kelamin Ampuh (133)
- Alif Nur (128)
- United States National Park Service: Publications (107)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (105)
- Publication Type
Articles 21481 - 21510 of 24573
Full-Text Articles in Social and Behavioral Sciences
Ecotones: The Heartbeat Of Huxley, 2001, Issue 10, Kate Koch, Huxley College Of The Environment, Western Washington University
Ecotones: The Heartbeat Of Huxley, 2001, Issue 10, Kate Koch, Huxley College Of The Environment, Western Washington University
Historical Collection of Huxley Newsletters
No abstract provided.
The Role Of Environmental Analogs In Identifying Potentially Invasive Woody Plants In Iowa, Mark P. Widrlechner
The Role Of Environmental Analogs In Identifying Potentially Invasive Woody Plants In Iowa, Mark P. Widrlechner
Journal of the Iowa Academy of Science: JIAS
Americans cultivate a large and diverse range of introduced woody plants as important sources of food and forest products, as well as for urban horticulture, amenity and wildlife plantings, and windbreaks. A small number of these species have become serious pests, disrupting well-established native plant communities or functioning as range and agricultural weeds. More of these species are not serious pests today, but have escaped cultivation and serve as potential sources of future outbreaks. Two other sources of potentially invasive woody plants are found among species that are not or are only rarely cultivated, about which we often know little …
Invasive Species In Iowa: An Introduction, James J. Dinsmore, Neil P. Bernstein
Invasive Species In Iowa: An Introduction, James J. Dinsmore, Neil P. Bernstein
Journal of the Iowa Academy of Science: JIAS
Concern over the increasing spread of invasive species and the potential impacts of those species on native communities has been the subject of several books and hundreds of research papers in recent years. President Clinton's Executive Order on invasive species in February1999 raised national attention to this issue. Natural resource agencies have been plagued by an ever-increasing number of invasive species and now consider this issue the second most important problem (after habitat loss) in their fight to maintain some semblance of natural communities on this planet. One group of experts estimated that in the United States alone, invasives cost …
War On Weeds: Winning It For Natural Areas, Jerry E. Asher
War On Weeds: Winning It For Natural Areas, Jerry E. Asher
Journal of the Iowa Academy of Science: JIAS
I am delighted to be here with you today to discuss the rapidly accelerating damage that invasive exotic plants are inflicting on natural areas in this country. This problem may seem overwhelming, but you need not despair because there are economical, realistic, and effective strategies available to meet this challenge.
There are two purposes to this presentation: to give you information you can use to convince others that invasive exotic plants are seriously harmful, and to suggest that we can win this war on invasive exotic plants if we engage enough of the right people.
An Overview And Management Plan Of Iowa's Non-Native, Invasive, Terrestrial Forbs, Deborah Q. Lewis, Richard O. Pope
An Overview And Management Plan Of Iowa's Non-Native, Invasive, Terrestrial Forbs, Deborah Q. Lewis, Richard O. Pope
Journal of the Iowa Academy of Science: JIAS
Non-native, invasive forb species have been a problem in Iowa since the earliest decades of Iowa's European settlement. The history of studies of Iowa's invasive plants began with L. H. Pammel, and these studies continue to present. Three tables cite the occurrence of many of these species in the state, with Table 1 listing 93 non-native forbs reported by Pammel, Table 2 citing ten invasive forbs of natural areas, and Table 3 adding 38 observed or potential aggressive species of Iowa's anthropogenic and natural areas.
There has been a divergence of interest and research in the management of invasive species …
Iowa's Non-Native Graminoids, Thomas R. Rosburg
Iowa's Non-Native Graminoids, Thomas R. Rosburg
Journal of the Iowa Academy of Science: JIAS
Iowa's non-native graminoids include 60 species of grasses and one species of bulrush. The exotic grass species comprise a large proportion (about 31%) of the total species richness of grasses in Iowa, which are second only to the Asteraceae in terms of total species. About half of the non-native graminoids (52%) occur sporadically and form sparse, non-invasive populations, while eighteen species (about 30%) are commonly encountered in large populations throughout the state. About 60% are annuals and a large majority (89%) has been introduced from either Europe or Asia. The C3 photosynthetic pathway is prevalent, occurring in approximately two-thirds of …
Eurasian Watermilfoil: Status And Management In Iowa, Gary S. Phillips
Eurasian Watermilfoil: Status And Management In Iowa, Gary S. Phillips
Journal of the Iowa Academy of Science: JIAS
In 1993, Eurasian watermilfoil (Myriophyllum spicatum L.) was discovered in Crystal Lake, Hancock County, Iowa. During the next three years, new infestations were discovered by the Iowa Department of Natural Resources (IDNR) fisheries personnel in four Iowa lakes. In July 1996, a program was established by the IDNR to address the threat posed by Eurasian watermilfoil to Iowa's aquatic ecosystems. As part of the Eurasian Watermilfoil Program, statewide aquatic vegetation monitoring was begun to identify those lakes currently infested with Eurasian watermilfoil. Monitoring activities were conducted by IDNR field technicians during the summers of 1996 through 2000. During this time …
Non-Native Amphibians And Reptiles In Iowa, James L. Christiansen
Non-Native Amphibians And Reptiles In Iowa, James L. Christiansen
Journal of the Iowa Academy of Science: JIAS
Only a few species appear as introductions into Iowa in the last 30 years. The bullfrog, Rana catesbeiana, was systematically introduced along with fish stocked from hatcheries in the 1930s and this species continues to spread in northern Iowa where it poses a hazard to smaller frogs. Turtles sold as pets, primarily map turtles (Graptemys pseudogeographica and G. geographica) and red-eared turtles (Trachemys scripta) continue to be found in scattered ponds, usually rural, throughout the state. The eastern box turtle (Terrapene carolma) has been reported in or on the edge of most major Iowa cities even though no breeding population …
Index For The Journal Of The Iowa Academy Of Science Volume 108 And Erratum
Index For The Journal Of The Iowa Academy Of Science Volume 108 And Erratum
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Editorial Board & Iowa Academy Of Science Officers And Directors
Editorial Board & Iowa Academy Of Science Officers And Directors
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Introduced Fungi: Some Cause Significant Plant Disease Problems, Lois H. Tiffany
Introduced Fungi: Some Cause Significant Plant Disease Problems, Lois H. Tiffany
Journal of the Iowa Academy of Science: JIAS
Species of the three groups of fungi characterized here on the basis of their energy source acquisition have differing potentials for becoming problem organisms following introduction as alien fungi new to Iowa. The decomposer group of fungi that obtain an energy supply by action of extracellular enzyme activity on dead plant tissues typically have perennial mycelium, are cosmopolitan in distribution, and are unlikely to become problems even if established. The second group, the mycorrhizal/lichen group are highly specific in their relationships. The mycorrhizal fungus group have a potential for being introduced as mycorrhiza already established with the roots of particular …
More Than A Century Of Change In The Ames, Iowa Flora (1859-2000), William R. Norris, Mark P. Widrlechner, Deborah Q. Lewis, Jimmie D. Thompson, Richard O. Pope
More Than A Century Of Change In The Ames, Iowa Flora (1859-2000), William R. Norris, Mark P. Widrlechner, Deborah Q. Lewis, Jimmie D. Thompson, Richard O. Pope
Journal of the Iowa Academy of Science: JIAS
We compared two floras compiled in Ames, Iowa: (1) an "historic" flora based on two published floras (1871, 1890) and on 1450 herbarium voucher specimens of plants collected in Ames between 1859 and 1899, and (2) a "current" flora compiled by us during recent fieldwork (1990-2000). Our goals were to determine 1) long-term changes in composition (i.e., the proportion of native species) over time, 2) long-term changes in the abundance of individual plant species over time, and 3) the extent of gains and losses of native and non-native plant species. We found that the proportion of native species declined over …
Exotic And Invasive Woody Plant Species In Iowa, Donald R. Farrar
Exotic And Invasive Woody Plant Species In Iowa, Donald R. Farrar
Journal of the Iowa Academy of Science: JIAS
Seventy species and hybrids of exotic woody trees, shrubs, and vines have naturalized in Iowa. Nearly half of these species (31) have become invasive pests in parts of the state or have potential do so. Most of the seriously invasive species are spread by bird ingestion of whole fruits. Widespread dispersal by birds hinders eradication efforts and should be considered a trait indicative of potential invasiveness. The economic and ecological values of Iowa forests are seriously compromised by exotic invasive woody species, especially where forests recovering from cropland and pasture are dominated by exotic species. Thus, a simple measure of …
Forest Invasives In Iowa: Current Problems And Future Issues, John Walkowiak, John Haanstad
Forest Invasives In Iowa: Current Problems And Future Issues, John Walkowiak, John Haanstad
Journal of the Iowa Academy of Science: JIAS
Iowa's forest resources of primarily deciduous trees covers over 0.8 million hectares (2 million acres) of upland and floodplain sites too steep or too wet for traditional row crop agriculture. These limited natural forests along with urban trees and shelterbelts plantings of trees are critical for environmental and economic enhancement in the state. Although not yet established in the state, exotic insects, such as gypsy moth, Asian longhorned beetle, and pine shoot beetle, threaten native tree vitality. Established exotic diseases such as oak wilt and Dutch elm disease continue to plague the survival of Iowa's oak and elm resources, respectively. …
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Purple Loosestrife: History, Management, And Biological Control In Iowa, Amy P. Wiebe, John J. Obrycki
Purple Loosestrife: History, Management, And Biological Control In Iowa, Amy P. Wiebe, John J. Obrycki
Journal of the Iowa Academy of Science: JIAS
Purple loosestrife (Lythrum salicaria) is an invasive plant species infesting wetlands in North America. Biodiversity and wetland habitat quality are reduced following purple loosestrife establishment. Several management tactics, including cultural, mechanical, and chemical controls, have had limited success in reducing the spread of purple loosestrife. Beginning in the 1990s, a biological control program has introduced several species of natural enemies from Europe that feed on purple loosestrife. Since 1994, Iowa State University has reared and released two species of beetles that feed on purple loosestrife, Galerucella calmariensis and G. pusilla. Biological control is one component of an integrated purple loosestrife …
Ecological Problems With Iowa's Invasive And Introduced Fishes, Neil P. Bernstein, John R. Olson
Ecological Problems With Iowa's Invasive And Introduced Fishes, Neil P. Bernstein, John R. Olson
Journal of the Iowa Academy of Science: JIAS
Since the time of European settlement, at least 59 non-indigenous fish species have been introduced, reached, or moved within Iowa waters. At least 28 nonnative fish species have been introduced into, or reported from Iowa waters since settlement. Of that number, 10 are established at this time through natural reproduction. In addition, many species of native fishes have been translocated within the state, and we provide documentation for 31 of these species. Two translocated species, gizzard shad (Dorosoma cepedianum) and yellow bass (Marone mississippiensis), have had adverse impacts on Iowa's aquatic ecosystems. While many introductions are thought to be benign, …
Invasive Birds In Iowa: Status, Problems, And Threats, James J. Dinsmore
Invasive Birds In Iowa: Status, Problems, And Threats, James J. Dinsmore
Journal of the Iowa Academy of Science: JIAS
A total of 18 invasive bird species has been introduced into or have expanded their range to include Iowa. These include ten non-North American species, one North American species that has been displaced and now is established in Iowa, and seven native species that have been released to reestablish Iowa populations. Twelve of those are regularly occurring species in Iowa, and they comprise 3.0% (12 of 404) of the species known from Iowa and 5% (10 of 199) of Iowa's nesting avifauna. These percentages are similar to those found in neighboring states. Several more species are likely to become established …
History And Development Of The Eurasian Watermilfoil Program In Iowa, Gary S. Phillips
History And Development Of The Eurasian Watermilfoil Program In Iowa, Gary S. Phillips
Journal of the Iowa Academy of Science: JIAS
Following a concerted effort by citizens of the Iowa Great Lakes area to address the threat posed by Eurasian watermilfoil (Myriophyllum spicatum L.) to waterbodies in Iowa, the Iowa Eurasian Watermilfoil Law was passed in 1996 by the Iowa legislature. Passage of this law led to the establishment of the Eurasian Watermilfoil Program in July 1996 to address the requirements specified by this legislation. Since establishment of the Eurasian Watermilfoil Program, numerous activities have been carried out to address the threat posed to aquatic ecosystems by Eurasian watermilfoil. These include public awareness and education, boat access monitoring, aquatic vegetation monitoring, …
1998 Debris Flows Near The Yakima River, Kittitas County, Washington—Some Geomorphic Implications, Martin R. Kaatz
1998 Debris Flows Near The Yakima River, Kittitas County, Washington—Some Geomorphic Implications, Martin R. Kaatz
Geography Faculty Scholarship
The geomorphic consequences of debris flows and their asso- ciated storms have been documented in many parts of the United States. Few, if any, have been studied and documented in central Washington. The importance of recurrent debris flows in sculpting Washington landscapes has not been generally recognized compared to other processes. Arid and semi-arid regions are particularly vulnerable to debris flows triggered by sudden intense thunderstorms. Most such areas are sparsely populated and eyewitnesses are uncommon. By contrast, semi-arid central Washington is relatively well popu- lated, and there are likely to be people who have observed the storms. Such witnesses …
Challenges For The New West: Economic Impacts Of Wilderness In Nevada's Rural Counties, Lesley Regina Argo
Challenges For The New West: Economic Impacts Of Wilderness In Nevada's Rural Counties, Lesley Regina Argo
UNLV Theses, Dissertations, Professional Papers, and Capstones
Public lands designated as part of the National Wilderness Preservation System are removed from multiple-use management for protection of their natural condition. Opponents argue that "locking up" the natural resources on these lands through designation will undermine the rural economies in the west that are dependent upon extractive industries such as mining and logging. Proponents argue that the "Old West" reliance on extractive industries is declining and, in the "New West", wilderness promotes economic development in rural communities by preserving the amenity values that draw population and employment to the region. Characteristics of Nevada's economy, population and land challenge the …
Helping At-Risk Students Add Up: Motivational Lessons For Students In High School Mathematics, Karen Beckner
Helping At-Risk Students Add Up: Motivational Lessons For Students In High School Mathematics, Karen Beckner
Mahurin Honors College Capstone Experience/Thesis Projects
No abstract provided.
The Progression Of Recycling In Bowling Green, Kentucky, Susan Marklin
The Progression Of Recycling In Bowling Green, Kentucky, Susan Marklin
Masters Theses & Specialist Projects
Recycling is an important issue when dealing with solid waste. It keeps many tons of garbage out of our landfills and prolongs landfill life. Although many people in the Bowling Green area participate in the mandatory recycling program, there are still many who do not. The number of people who participate in the program has steadily grown over the past five years; however, there are still many people who need to get involved. This research argues that much effort has been put into recycling in recent years at the global, national, and local level. However, it also argues that even …
Ecotones: The Heartbeat Of Huxley, 2001, Fall, Issue 09, Kate Koch, Huxley College Of The Environment, Western Washington University
Ecotones: The Heartbeat Of Huxley, 2001, Fall, Issue 09, Kate Koch, Huxley College Of The Environment, Western Washington University
Historical Collection of Huxley Newsletters
No abstract provided.
Ecotones: The Heartbeat Of Huxley, 2001, November 05, Kate Koch, Huxley College Of The Environment, Western Washington University
Ecotones: The Heartbeat Of Huxley, 2001, November 05, Kate Koch, Huxley College Of The Environment, Western Washington University
Historical Collection of Huxley Newsletters
No abstract provided.
Gasoline Consumption Attributable To Gasoline Powered Watercraft Use In Maine, Jonathan Rubin, Charles Morrris, Suzanne K. Hart
Gasoline Consumption Attributable To Gasoline Powered Watercraft Use In Maine, Jonathan Rubin, Charles Morrris, Suzanne K. Hart
Economic Development
This study was conducted by the Margaret Chase Smith Center for Public Policy (MCSC) of the University of Maine at the request of the Maine Legislature’s Commission to Study Equity in the Distribution of Gas Tax Revenues Attributable to Snowmobiles, All-Terrain Vehicles and Watercraft. The Commission was created by the Legislature with a charge to collect and analyze information to determine an equitable distribution of gas tax revenues used in the enforcement and enhancement of programs supporting off-road vehicle use in Maine. The Commission concluded that snowmobiling, boating and ATV use has increased significantly over recent years and now constitutes …
Knowledge Discovery In Biological Datasets Using A Hybrid Bayes Classifier/Evolutionary Algorithm, Michael L. Raymer, Leslie A. Kuhn, William F. Punch
Knowledge Discovery In Biological Datasets Using A Hybrid Bayes Classifier/Evolutionary Algorithm, Michael L. Raymer, Leslie A. Kuhn, William F. Punch
Kno.e.sis Publications
A key element of bioinformatics research is the extraction of meaningful information from large experimental data sets. Various approaches, including statistical and graph theoretical methods, data mining, and computational pattern recognition, have been applied to this task with varying degrees of success. We have previously shown that a genetic algorithm coupled with a k-nearest-neighbors classifier performs well in extracting information about protein-water binding from X-ray crystallographic protein structure data. Using a novel classifier based on the Bayes discriminant function, we present a hybrid algorithm that employs feature selection and extraction to isolate salient features from large biological data sets. The …
Profile Combinatorics For Fragment Selection In Comparative Protein Structure Modeling, Deacon Sweeney, Travis E. Doom, Michael L. Raymer
Profile Combinatorics For Fragment Selection In Comparative Protein Structure Modeling, Deacon Sweeney, Travis E. Doom, Michael L. Raymer
Kno.e.sis Publications
Sequencing of the human genome was a great stride towards modeling cellular complexes, massive systems whose key players are proteins and DNA. A major bottleneck limiting the modeling process is structure and function annotation for the new genes. Contemporary protein structure prediction algorithms represent the sequence of every protein of known structure with a profile to which the profile of a protein sequence of unknown structure is compared for recognition. We propose a novel approach to increase the scope and resolution of protein structure profiles. Our technique locates equivalent regions among the members of a structurally similar fold family, and …