WorldWideScience

Sample records for range wilderness study

  1. Changing conditions on wilderness campsites: Seven case studies of trends over 13 to 32 years

    Science.gov (United States)

    David N. Cole

    2013-01-01

    This report brings together seven case studies of trends in the number and condition of wilderness campsites over periods ranging from 13 to 32 years. Case examples come from five mountainous wilderness areas in the western United States: Sequoia-Kings Canyon Wilderness in California, the Eagle Cap Wilderness in Oregon, the Frank Church-River of No Return Wilderness in...

  2. PIEDRA WILDERNESS STUDY AREA, COLORADO.

    Science.gov (United States)

    Condon, Steven M.; Brown, S. Don

    1984-01-01

    The Pedra Wilderness Study Area, located approximately 30 mi northeast of Durango, Colorado, was evaluated for its mineral-resource potential. Geochemical and geophysical studies indicate little promise for the occurrence of mineral or energy resources in this area. This conclusion is supported by the findings of the earlier study and is suggested by the absence of significant mining activity in the area.

  3. Cognitive dimensions of recreational user experiences in wilderness: an exploratory study in Adirondack wilderness areas.

    Science.gov (United States)

    Chad P. Dawson; Peter Newman; Alan Watson

    1998-01-01

    This exploratory study involved identifying the dimensions of a wilderness experience sought by users based on the available literature and on input from wilderness users. Input was collected using focus group interviews with members of four groups that were primarily involved in wilderness use and preservation in recent years. Positive and negative dimensions are...

  4. Bureau of Land Management Wilderness Study Areas

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — This dataset is meant to depict Wilderness Study Areas (WSA's), within the state of New Mexico, identified by the U.S. Bureau of Land Management (BLM) as having...

  5. Environmental ethics and wilderness management: an empirical study

    Science.gov (United States)

    William A. Valliere; Robert E. Manning

    1995-01-01

    The underlying hypothesis of this study is that environmental ethics influence public attitudes toward wilderness management. To study this hypothesis, environmental ethics were defined, categorized, and measured empirically. Additionally, attitudes toward selected wilderness management issues were measured. Associations were found between beliefs in selected...

  6. SPANISH PEAKS WILDERNESS STUDY AREA, COLORADO.

    Science.gov (United States)

    Budding, Karin E.; Kluender, Steven E.

    1984-01-01

    A geologic and geochemical investigation and a survey of mines and prospects were conducted to evaluate the mineral-resource potential of the Spanish Peaks Wilderness Study Area, Huerfano and Las Animas Counties, in south-central Colorado. Anomalous gold, silver, copper, lead, and zinc concentrations in rocks and in stream sediments from drainage basins in the vicinity of the old mines and prospects on West Spanish Peak indicate a substantiated mineral-resource potential for base and precious metals in the area surrounding this peak; however, the mineralized veins are sparse, small in size, and generally low in grade. There is a possibility that coal may underlie the study area, but it would be at great depth and it is unlikely that it would have survived the intense igneous activity in the area. There is little likelihood for the occurrence of oil and gas because of the lack of structural traps and the igneous activity.

  7. Where the wild things are: A research agenda for studying wildlife-wilderness relationship

    Science.gov (United States)

    Schwartz, Michael K.; Hahn, Beth; Hossack, Blake R.

    2016-01-01

    We explore the connection between US designated wilderness areas and wildlife with the goal of establishing a research agenda for better understanding this complex relationship. Our research agenda has two components. The first, “wildlife for wilderness,” considers the impact of wildlife on wilderness character. Whereas studies show that wildlife is important in both the perception and actual enhancement of wilderness character, the context and particulars of this relationship have not been evaluated. For instance, is knowing that a rare, native species is present in a wilderness area enough to increase perceptions of naturalness (an important wilderness quality)? Or does the public need to observe the species or its sign (e.g., tracks) for this benefit? The second part of our research agenda, “wilderness for wildlife,” considers the types of research needed to understand the impact of wilderness areas on wildlife and biodiversity conservation. Several studies show the effect of one area being designated wilderness on one wildlife species. Yet, there has been no research that examines how the networks of wilderness areas in the National Wilderness Preservation System (NWPS) are used by a species or a community of species. Furthermore, we found no studies that focused on how the NWPS affects ecological or trophic interactions among species. We hope that by providing a research agenda, we can spur multiple lines of research on the topic of wildlife and wilderness.

  8. Mineral Resources of the Morey and Fandango Wilderness Study Areas, Nye County, Nevada

    Science.gov (United States)

    John, David A.; Nash, J. Thomas; Plouff, Donald; McDonnell, John R.

    1987-01-01

    The Morey (NV-060-191) and Fandango (NV-060-190) Wilderness Study Areas are located in the northern Hot Creek Range about 25 mi north of Warm Springs, Nev. At the request of the Bureau of Land Management, 46,300 acres of the Morey and Fandango Wilderness Study Areas were studied. In this report, the area studied is referred to as 'the wilderness study area', or simply 'the study area'. Geologic, geochemical, geophysical, and mineral surveys were conducted by the USGS and the USBM in 1984 to appraise the identified mineral resources and to assess the mineral resource potential of the study areas. These studies indicate that there are small identified resources of zinc, lead, and silver at the Lead Pipe property in the Fandango Wilderness Study Area, several areas of high potential for the occurrence of gold resources in the Fandango study area, small areas of low and moderate potential for the occurrence of silver, lead, and zinc resources in the Fandango study area, areas of moderate and high potential for the occurrence of silver, lead, and zinc resources in the Morey study area, and an area of low potential for copper, molybdenum, and tin in the Morey study area. Both study areas have low resource potential for petroleum, natural gas, uranium, and geothermal energy.

  9. Keeping it wild: mapping wilderness character in the United States.

    Science.gov (United States)

    Carver, Steve; Tricker, James; Landres, Peter

    2013-12-15

    A GIS-based approach is developed to identify the state of wilderness character in US wilderness areas using Death Valley National Park (DEVA) as a case study. A set of indicators and measures are identified by DEVA staff and used as the basis for developing a flexible and broadly applicable framework to map wilderness character using data inputs selected by park staff. Spatial data and GIS methods are used to map the condition of four qualities of wilderness character: natural, untrammelled, undeveloped, and solitude or primitive and unconfined recreation. These four qualities are derived from the US 1964 Wilderness Act and later developed by Landres et al. (2008a) in "Keeping it Wild: An Interagency Strategy to Monitor Trends in Wilderness Character Across the National Wilderness Preservation System." Data inputs are weighted to reflect their importance in relation to other data inputs and the model is used to generate maps of each of the four qualities of wilderness character. The combined map delineates the range of quality of wilderness character in the DEVA wilderness revealing the majority of wilderness character to be optimal quality with the best areas in the northern section of the park. This map will serve as a baseline for monitoring change in wilderness character and for evaluating the spatial impacts of planning alternatives for wilderness and backcountry stewardship plans. The approach developed could be applied to any wilderness area, either in the USA or elsewhere in the world. Copyright © 2013 Elsevier Ltd. All rights reserved.

  10. Geochemistry of altered and mineralized rocks from the Morey and Fandango Wilderness Study Areas, northern Hot Creek Range, Nye County, Nevada

    Science.gov (United States)

    Nash, J.T.; John, D.A.; Malcolm, M.J.; Briggs, P.H.; Crock, J.G.

    1986-01-01

    The U.S. Geological Survey and the St. Johns River Water Management District are investigating the hydrogeology of the Floridan aquifer system. An essential element of this investigation is the design and construction of a monitor well network in the lower saline water-bearing zone which occurs at about 2,000 ft below land surface. During 1985, a well near Ponte Vedra in northeast St. Johns County was completed into the lower saline water-bearing zone at a depth of 1,980 to 2,035 ft below land surface. This well and other wells drilled under this or other programs will be used to monitor water levels and water chemistry of the lower saline zone. Chloride concentrations in water above the lower saline zone ranged from 14 to 270 mg/L and specific conductance ranged from 450 to 1,440 micromhos/cm c. In the lower zone, chloride concentrations were as much as 16,210 mg/L and specific conductance as much as 46,000 micromhos per centimeter. Aquifer head and artesian flow from the well generally increased with depth. Water temperatures also increased from 23 C in the upper part of the aquifer to more than 28 C in the lower saline zone. (USGS)

  11. 75 FR 33573 - Information Collection; Aldo Leopold Wilderness Research Institute Wilderness Visitor Study

    Science.gov (United States)

    2010-06-14

    ..., methods used to protect wilderness conditions and social conditions, actions taken by managers to control... most important elements of the wilderness environment and social conditions, such as naturalness, wildness, challenge, self-reliance, crowding, and aesthetics; and 4. How current visitor use...

  12. Eastern wilderness users: perceptions from two small wilderness areas

    Science.gov (United States)

    Nicholas Palso; Alan Graefe

    2007-01-01

    This study explores perceptions of wilderness recreationists in the eastern United States, with a focus on definitions of wilderness areas and factors that may decrease enjoyment of the wilderness experience. The eventual aim is to compare these data with information collected from wilderness users in the western United States. The few studies performed on this...

  13. Trends in wilderness recreation use characteristics

    Science.gov (United States)

    Alan E. Watson; David N. Cole; Joseph W. Roggenbuck

    1995-01-01

    Recent studies at the Leopold Institute have included analysis of use and user trends at the Boundary Waters Canoe Area Wilderness, Desolation Wilderness, Shining Rock Wilderness, the Bob Marshall Wilderness Complex, Great Smoky Mountains National Park and Eagle Cap Wilderness. Some sociodemographics, like age, education, and the proportion of female visitors, have...

  14. CENTENNIAL MOUNTAINS WILDERNESS STUDY AREA, MONTANA AND IDAHO.

    Science.gov (United States)

    Witkind, Irving J.; Ridenour, James

    1984-01-01

    A mineral survey conducted within the Centennial Mountains Wilderness study area in Montana and Idaho showed large areas of probable and substantiated resource potential for phosphate. Byproducts that may be derived from processing the phosphate include vanadium, chromium, uranium, silver, fluorine, and the rare earths, lanthanum and yttrium. Results of a geochemical sampling program suggest that there is little promise for the occurrence of base and precious metals in the area. Although the area contains other nonmetallic deposits, such as coal, building stone, and pumiceous ash they are not considered as mineral resources. There is a probable resource potential for oil and gas and significant amounts may underlie the area around the Peet Creek and Odell Creek anticlines.

  15. Mineral resources of the Swasey Mountain and Howell Peak Wilderness Study Areas, Millard County, Utah

    Energy Technology Data Exchange (ETDEWEB)

    Lindsey, D.A.; Zimbelman, D.R.; Campbell, D.L.; Duval, J.S.; Cook, K.L.; Podwysocki, M.H.; Brickey, D.W.; Yambrick, R.A.; Tuftin, S.E.

    1989-01-01

    The Swasey Mountain and the Howell Peak Wilderness Study Areas are underlain by an east-dipping sequence of carbonate rocks, shale, and quartzite of Cambrian age. The Sand Pass mineralized area, immediately northwest of the Swasey Mountain Wilderness Study Area, contains numerous occurrences of jasperoid, small igneous intrusions of Tertiary age, and geochemical anomalies; the mineralized area has been explored for gold. Although no identified resources of metals are known in or near the wilderness study areas, the distribution of geologic structures and stream-sediment geochemical anomalies indicates there is a moderate potential for undiscovered resources of lead, zinc, copper, molybdenum, silver, and gold. An area of moderate potential for undiscovered resources of these metals extends south and east into the Swasey Mountain Wilderness Study Area from the Sand Pass mineralized area. A second area of moderate potential for undiscovered resources of these metals extends from the southern part of the Swasey Mountain Wilderness Study Area across the western part of the Howell Peak Wilderness Study Area. Both study areas contain inferred subeconomic resources of quartzite, high-purity limestone, and sand and gravel. Both areas have moderate resource potential for high-purity limestone and dolomite. Fossils, especially trilobites, of interest to collectors are present in both areas. The potential for undiscovered resources is moderate for oil and gas and is low for geothermal energy within the study areas. There is no potential for undiscovered resources of coal.

  16. 78 FR 67187 - Notice of Availability of the Draft General Management Plan/Wilderness Study/Environmental Impact...

    Science.gov (United States)

    2013-11-08

    ... focus on protecting natural resources and systems. Under this alternative, most of the Big Spring... Availability of the Draft General Management Plan/ Wilderness Study/Environmental Impact Statement for the... Management Plan/Wilderness Study/Environmental Impact Statement (GMP/WS/EIS) for the Ozark National Scenic...

  17. Mineral resources of the Turtle Mountains Wilderness Study Area, San Bernardino County, California

    Science.gov (United States)

    Howard, Keith A.; Nielson, Jane E.; Simpson, Robert W.; Hazlett, Richard W.; Alminas, Henry V.; Nakata, John K.; McDonnell, John R.

    1988-01-01

    At the request of the U.S. Bureau of Land Management, approximately 105,200 acres of the Turtle Mountains Wilderness Study Area (CDCA-307) were evaluated for mineral resources (known) and resource potential (undiscovered). In this report, the area studied is referred to as "the wilderness study area" or simply "the study area"; any reference to the Turtle Mountain Wilderness Study Area refers only to that part of the wilderness study area for which a mineral survey was requested by the U.S. Bureau of Land Management.The wilderness study area is in southeastern San Bernardino County, Calif. Gold, silver, copper, and lead have been mined within and adjacent to the study area. Copper-zinc-silver-gold mineral occurrences are found in the southern part and gold-silver mineral occurrences are found in the northern part of the study area; identified low- to moderate-grade gold-silver resources occur adjacent to the study area along the western boundary. Six areas in the south-central and northwestern parts of the study area have high resource potential, two broad areas have moderate resource potential, and part of the southwest corner has low resource potential for lode gold, silver, and associated copper, lead, zinc, molybdenum, and tungsten. Alluvium locally within one of these areas has moderate resource potential for placer gold and silver, and the entire area has low resource potential for placer gold and silver. There is low resource potential for perlite, ornamental stone (onyx marble and opal), manganese, uranium and thorium, pegmatite minerals, and oil and gas within the study area. Sand and gravel are abundant but are readily available outside the wilderness study area.

  18. From research to policy: The White Cap Wilderness Fire Study

    Science.gov (United States)

    Diane Smith

    2014-01-01

    On August 18, 1972, an aerial patrol reported a snag burning deep in the Selway-Bitterroot Wilderness in Idaho. Bob Mutch, then a young research forester, traveled to the site the following day for an on-the-ground assessment. It was, Mutch later recalled, a little "nothing fire" that posed no threat. And he was right. Growing to only 24 feet by 24...

  19. 76 FR 75557 - Draft Environmental Impact Statement for General Management Plan/Wilderness Study, Hawaii...

    Science.gov (United States)

    2011-12-02

    ... Environmental Impact Statement for General Management Plan/ Wilderness Study, Hawaii Volcanoes National Park, Hawaii AGENCY: National Park Service, Interior. ACTION: Notice of intent. SUMMARY: The National Park... updating the General Management Plan (GMP) for Hawaii Volcanoes National Park. As part of this conservation...

  20. Research plan for integrated ecosystem and pollutant monitoring at remote wilderness study sites

    International Nuclear Information System (INIS)

    Bruns, D.A.; Wiersma, G.B.

    1988-03-01

    This research plan outlines an approach to the measurement of pollutants and ecosystem parameters at remote, high-elevation, wilderness study sites. A multimedia, systems approach to environmental monitoring is emphasized. The primary purpose of the research is to apply and field test a technical report entitled ''Guidelines for measuring the physical, chemical, and biological condition of wilderness ecosystems.'' This document intended to provide Federal Land Managers with information to establish environmental monitoring programs in wilderness areas. To date, this monitoring document has yet to be evaluated under rigorous field conditions at a remote, high-elevation Rocky Mountain site. For the purpose of field testing approaches to monitoring of pollutants and ecosystems in remote, wilderness areas, evaluation criteria were developed. These include useability, cost-effectiveness, data variability, alternative approaches, ecosystems conceptual approach, and quality assurance. Both the Forest Service and INEL environmental monitoring techniques will be evaluated with these criteria. Another objective of this research plan is to obtain an integrated data base on pollutants and ecosystem structure and function at a remote study site. The methods tested in this project will be used to acquire these data from a systems approach. This includes multimedia monitoring of air and water quality, soils, and forest, stream, and lake ecosystems. 71 refs., 1 fig., 9 tabs

  1. Mineral resources of the Muggins Mountains Wilderness Study Area, Yuma County, Arizona

    International Nuclear Information System (INIS)

    Smith, D.B.; Tosdal, R.M.; Pitkin, J.A.; Kleinkopf, M.D.; Wood, R.H.

    1989-01-01

    The Muggins Mountains Wilderness Study Area covers approximately 8,855 acres immediately south of the Yuma Proving Ground. This study area contains sand and gravel, and it has a moderate potential for gold in placer deposits. One small drainage basin along the southeast boundary of this study area has a moderate potential for uranium. This study area has a low potential for geothermal energy and for oil and gas resources

  2. Tables of co-located geothermal-resource sites and BLM Wilderness Study Areas

    Energy Technology Data Exchange (ETDEWEB)

    Foley, D.; Dorscher, M.

    1982-11-01

    Matched pairs of known geothermal wells and springs with BLM proposed Wilderness Study Areas (WSAs) were identified by inspection of WSA and Geothermal resource maps for the states of Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington and Wyoming. A total of 3952 matches, for geothermal sites within 25 miles of a WSA, were identified. Of these, only 71 (1.8%) of the geothermal sites are within one mile of a WSA, and only an additional 100 (2.5%) are within one to three miles. Approximately three-fourths of the matches are at distances greater than ten miles. Only 12 of the geothermal sites within one mile of a WSA have surface temperatures reported above 50/sup 0/C. It thus appears that the geothermal potential of WSAs overall is minimal, but that evaluation of geothermal resources should be considered in more detail for some areas prior to their designation as Wilderness.

  3. How wilderness therapy works: an examination of the wilderness therapy process to treat adolescents with behavioral problems and addictions

    Science.gov (United States)

    Keith C. Russell; John C. Hendee; Dianne Phillips-Miller

    2000-01-01

    This paper summarizes findings from a detailed study of the processes employed by four leading wilderness therapy programs focusing on how wilderness therapy works, the kinds of behavioral problems to which it is commonly applied, expected outcomes and the role of wilderness in the intervention and treatment process (Russell, 1999). Wilderness therapy is an emerging...

  4. Transcontinental wilderness survey: comparing perceptions between wilderness users in the eastern and western United States

    Science.gov (United States)

    Nicholas Palso; Alan Graefe

    2008-01-01

    This study explores the differences in perceptions of wilderness between recreationists in the Eastern United States and those from the West, with a focus on definitions of wilderness areas and factors that may decrease enjoyment of the wilderness experience. The few studies performed on this comparison over the past 25 years have produced inconsistent results and...

  5. Wilderness in the 21st Century: A framework for testing assumptions about ecological intervention in wilderness using a case study of fire ecology in the Rocky Mountains

    Science.gov (United States)

    Cameron E. Naficy; Eric G. Keeling; Peter Landres; Paul F. Hessburg; Thomas T. Veblen; Anna. Sala

    2016-01-01

    Changes in the climate and in key ecological processes are prompting increased debate about ecological restoration and other interventions in wilderness. The prospect of intervention in wilderness raises legal, scientific, and values-based questions about the appropriateness of possible actions. In this article, we focus on the role of science to elucidate the...

  6. The Finnish "social wilderness"

    Science.gov (United States)

    Ville Hallikainen

    2000-01-01

    The cultural roots and images of the Finnish wilderness lie in its use as a source of livelihood practiced in southern and central Finland during the Middle Ages. There are statutory wilderness areas in Finland, but Finnish people consider many other areas as wilderness. It is important for management of the areas, statutory wilderness areas and the other wilderness-...

  7. Atmospheric transport of contaminants to remote arctic wilderness areas: A pilot study

    International Nuclear Information System (INIS)

    Crayton, W.M.; Talbot, S.

    1993-01-01

    The Alaska Maritime National Wildlife Refuge includes the Tuxedni Wilderness Area (WA), which is required to meet the Class 1 air quality requirements of the Clean Air Act (42 CFT 7401 et seq.). The Act specifically protects such areas from significant deterioration; however, most Class 1 Wilderness monitoring focuses on visual impairment and traditional atmospheric pollutants such as NOx. This study was designed to assess the feasibility of also measuring atmospheric transport of potentially toxic elemental and organic contaminants to remote areas as a pilot for subsequent monitoring of Service lands to be undertaken through the Biomonitoring of Environmental Status and Trends (BEST) Program. Located on the western shore of Cook Inlet, the Tuxedni WA lies about 80 km downwind of a major petroleum complex that the City of Anchorage. Elemental contaminants emanating from the city will be studied in two species of widely distributed alpine vegetation (Cladina rangiferina, a lichen; and Hylocomium splendens, a moss) collected from elevated windward slopes on Chisik Island, a remote site in the WA. Vegetation samples will be analyzed for a suite of potentially toxic elements by inductively coupled plasma emission spectrometry and atomic absorption spectrophotometry. Polycyclic aromatic compounds originating from petroleum-related and urban sources will be studied through the deployment of lipid-containing passive accumulators and analysis by gas chromatography with photoionization detection. Reference areas will also be selected and monitored

  8. 75 FR 71730 - General Management Plan/Wilderness Study/Off-Road Vehicle Management Plan, Final Environmental...

    Science.gov (United States)

    2010-11-24

    ... management under alternative B would be to enable visitor participation in a wide variety of outdoor... DEPARTMENT OF THE INTERIOR National Park Service [2031-A046-409] General Management Plan/Wilderness Study/Off-Road Vehicle Management Plan, Final Environmental Impact Statement, Big Cypress National...

  9. A case study of communication with Anglo and Hispanic wilderness visitors

    Science.gov (United States)

    Julia Dawn Parker; Patricia L. Winter

    1998-01-01

    Educating, interpreting for, and communicating with wilderness visitors is necessary to promote appropriate low-impact wilderness recreation. The Angeles National Forest is located northeast of Los Angeles and is surrounded by a large and ethnically diverse population that provided a potentially ethnically diverse sample ofwilderness visitors for the purpose of this...

  10. Bryophytes from Tuxedni Wilderness area, Alaska

    Science.gov (United States)

    Schofield, W.B.; Talbot, S. S.; Talbot, S.L.

    2002-01-01

    The bryoflora of two small maritime islands, Chisik and Duck Island (2,302 ha), comprising Tuxedni Wilderness in western lower Cook Inlet, Alaska, was examined to determine species composition in an area where no previous collections had been reported. The field study was conducted from sites selected to represent the totality of environmental variation within Tuxedni Wilderness. Data were analyzed using published reports to compare the bryophyte distribution patterns at three levels, the Northern Hemisphere, North America, and Alaska. A total of 286 bryophytes were identified: 230 mosses and 56 liverworts. Bryum miniatum, Dichodontium olympicum, and Orthotrichum pollens are new to Alaska. The annotated list of species for Tuxedni Wilderness expands the known range for many species and fills distribution gaps within Hulte??n's Central Pacific Coast district. Compared with bryophyte distribution in the Northern Hemisphere, the bryoflora of Tuxedni Wilderness primarily includes taxa of boreal (61%), montane (13%), temperate (11%), arctic-alpine (7%), cosmopolitan (7%), distribution; 4% of the total moss flora are North America endemics. A brief summary of the botanical exploration of the general area is provided, as is a description of the bryophytes present in the vegetation and habitat types of Chisik and Duck Islands.

  11. An hermeneutic approach to studying the nature of wilderness experiences

    Science.gov (United States)

    Michael E. Patterson; Alan E. Watson; Daniel R. Williams; Joseph R. Roggenbuck

    1998-01-01

    The most prevalent approach to understanding recreation experiences in resource management has been a motivational research program that views satisfaction as an appropriate indicator of experience quality. This research explores a different approach to studying the quality of recreation experiences. Rather than viewing recreation experiences as a linear sequence of...

  12. New relationships with wilderness

    Science.gov (United States)

    Yang He

    2007-01-01

    I grew up in urban China, and to me wilderness was an enchanting yet elusive concept. Although I traveled extensively in China to remote locations, studied leisure and recreation management at Pennsylvania State University at the doctoral level, and taught recreation management at the University of Montana, backcountry camping is simply not a common practice among...

  13. Mineral resource potential of the Piedra Wilderness Study Area, Archuleta and Hinsdale counties, Colorado

    Science.gov (United States)

    Bush, Alfred L.; Condon, Steven M.; Franczyk, Karen J.; Brown, S.Don

    1983-01-01

    The mineral resource potential of the Piedra Wilderness Study Area is low. No occurrences of metallic minerals, of valuable industrial rocks and minerals, or of useful concentrations of organic fuels are known in the study area. However, a noneconomic occurrence of gypsum in the Jurassic Wanakah Formation lies a few hundred feet west of the WSA boundary, is believed to extend into the WSA, and has a low resource potential. Particular attention was paid to the possible occurrence of organic fuels in the Pennsylvanian Hermosa Formation, of uranium and vanadium in the Jurassic Entrada Sandstone and Morrison Formation, and of coal in the Cretaceous Dakota Sandstone. Thin coaly beds in the Dakota have a low resource potential. Extensive sampling of stream sediments, limited sampling of rock outcrops and springs, and a number of scintillometer traverses failed to pinpoint significant anomalies that might be clues to mineral deposits.

  14. Mineral resources of the South Mccullough Mountains Wilderness Study Area, Clark County, Nevada

    International Nuclear Information System (INIS)

    DeWitt, E.; Anderson, J.L.; Barton, H.N.; Jachens, R.C.; Podwysocki, M.H.; Brickey, D.W.; Close, T.J.

    1989-01-01

    The authors present a study of 19,558 acres of the South McCullough Mountains Wilderness Study Area. The study area contains no identified mineral resources and has no areas of high mineral resource potential. However, five areas that make up 20 percent of the study area have a moderate potential either for undiscovered silver, gold, lead, copper, and zinc resources in small vein deposits; for lanthanum and other rare-earth elements, uranium, thorium, and niobium in medium-size carbonatite bodies and dikes; for tungsten and copper in small- to medium-size vein deposits; or for silver and gold in small vein or breccia-pipe deposits. Six areas that makeup 24 percent of the study area have an unknown resource potential either for gold, silver, lead, and copper in small vein deposits; for gold, silver, lead, zinc, copper, and arsenic in small vein or breccia-pipe deposits; for lanthanum and other rare-earth elements, uranium, thorium, and niobium in medium-size carbonatite bodies and dikes; or for tungsten and copper in small vein deposits

  15. Human values and codes of behavior: Changes in Oregon's Eagle Cap Wilderness visitors and their attitudes

    Science.gov (United States)

    Alan E. Watson; John C. Hendee; Hans P. Zaglauer

    1996-01-01

    A study of visitors to Oregon's Eagle Cap Wilderness in 1965 offered a baseline against which to evaluate how those who recreate in wilderness have changed their views of wilderness. A study of visitors to that same wilderness area in 1993 provided comparative data. Some characteristics of the visitors changed in ways that would suggest that the values visitors...

  16. Information collection styles of wilderness users: a market segmentation approach

    Science.gov (United States)

    Roy Ramthun; Lynda Kersey; Jim Rogers

    2000-01-01

    Attempts to influence the behavior of wilderness visitors through the use of information are limited by the visitors’ reception of that information. This study examined the information gathering behavior of wilderness visitors and the effect of different information collection styles on visitors’ knowledge of low-impact behavior and attitudes toward wilderness...

  17. Changes in the motivations, perceptions, and behaviors of recreation users: Displacement and coping in wilderness

    Science.gov (United States)

    Troy E. Hall; David N. Cole

    2007-01-01

    We describe how wilderness visitors perceive changes in wilderness use, impacts, and management. We examine how visitors have responded to change, both behaviorally and cognitively. The study was based on a sample of visitors to 19 Forest Service wildernesses in Oregon and Washington. Many respondents said the types of wilderness trips they take have changed since...

  18. Core Content for Wilderness Medicine Training: Development of a Wilderness Medicine Track Within an Emergency Medicine Residency.

    Science.gov (United States)

    Schrading, Walter A; Battaglioli, Nicole; Drew, Jonathan; McClure, Sarah Frances

    2018-03-01

    Wilderness medicine training has become increasingly popular among medical professionals with numerous educational opportunities nationwide. Curricula for fellowship programs and for medical student education have previously been developed and published, but a specific curriculum for wilderness medicine education during emergency medicine (EM) residency has not. The objective of this study is to create a longitudinal wilderness medicine curriculum that can be incorporated into an EM residency program. Interest-specific tracks are becoming increasingly common in EM training. We chose this model to develop our curriculum specific to wilderness medicine. Outlined in the article is a 3-year longitudinal course of study that includes a core didactic curriculum and a plan for graduated level of responsibility. The core content is specifically related to the required EM core content for residency training with additions specific to wilderness medicine for the residents who pursue the track. The wilderness medicine curriculum would give residencies a framework that can be used to foster learning for residents interested in wilderness medicine. It would enhance the coverage of wilderness and environmental core content education for all EM residents in the program. It would provide wilderness-specific education and experience for interested residents, allowing them to align their residency program requirements through a focused area of study and enhancing their curriculum vitae at graduation. Finally, given the popularity of wilderness medicine, the presence of a wilderness medicine track may improve recruitment for the residency program. Copyright © 2017 Wilderness Medical Society. Published by Elsevier Inc. All rights reserved.

  19. Personal Wilderness Relationships: Building on a Transactional Approach

    Science.gov (United States)

    Dvorak, Robert G.; Borrie, William T.; Watson, Alan E.

    2013-12-01

    Wilderness managers are charged with the challenging goal of balancing resource protection and experience quality across a broad, value-laden landscape. While research has provided insight into visitors' motivations and their meanings for wilderness, a struggle exists to implement experiential concepts within current management frameworks. This research posits the human experience of wilderness to be an evolving, enduring relationship, and that research needs can be addressed by conceptualizing and investigating an individuals' personal wilderness relationship. The purpose of this study was to explore wilderness relationships of visitors to the Boundary Waters Canoe Area Wilderness. A predictive model was proposed to investigate the internal dimensions of a visitor's wilderness relationship. A mail-back questionnaire was distributed during the summer of 2007, resulting in a sample of 564 respondents. Data were analyzed using confirmatory factor analysis and structural equation modeling. Results from testing several relationship models provided support for a multidimensional structure consisting of five factors with a single overarching relationship factor. The preferred relationship model indicated the importance of identities and attachment in place relationships. Trust and commitment toward management were also important considerations. This research provided the preliminary evidence for a multidimensional wilderness relationship model and complements a perspective of wilderness experiences as wilderness. Findings may help to reframe decision-making and public-input processes that guide management actions to increased wilderness character protection and facilitate quality wilderness experiences.

  20. An examination of constraints to wilderness visitation

    Science.gov (United States)

    Gary T. Green; J. Michael Bowker; Cassandra Y. Johnson; H. Ken Cordell; Xiongfei Wang

    2007-01-01

    Certain social groups appear notably less in wilderness visitation surveys than their population proportion. This study examines whether different social groups in American society (minorities, women, rural dwellers, low income and less educated populations) perceive more constraints to wilderness visitation than other groups. Logistic regressions were fit to data from...

  1. Wilderness Recreation Education

    Science.gov (United States)

    Drury, Jack K.

    1977-01-01

    A Wilderness Recreation Education program aims to: offer students an opportunity to be involved with direct learning in the outdoors; instill an understanding of ways to exist within and enjoy the wilderness environment; and develop an awareness of an appreciation for the need to conserve and maintain the wilderness environment for generations to…

  2. The verification of wilderness area boundaries as part of a buffer zone demarcation process: A case study from the uKhahlamba Drakensberg Park World Heritage Site

    Science.gov (United States)

    Sonja C. Kruger; Ian A. Rusworth; Kirsten Oliver

    2011-01-01

    Wilderness areas are by definition free from the sights and sounds of modern man. The boundaries of wilderness areas have traditionally been defined based on the management authorities' perceptions of which areas have wilderness quality. Experience shows that many areas classified as wilderness do not actually have wilderness qualities and do not provide a true...

  3. Wilderness management through voluntary behavior change: an evaluation of the Pemigewasset Wilderness Management Plan

    Science.gov (United States)

    John M. Halstead; Cindy M. Brown; Albert E. Luloff; Bruce E. Lindsay

    1992-01-01

    The management plan for the Pemigewasset Wilderness Area of New Hampshire represents a departure from traditional plans. Results of this study indicate limited evidence of the Pemigewasset Wilderness Management Plan (PWMP), as currently implemented, having a large direct impact on diverting hikers from their planned destinations and promoting dispersed usage and low...

  4. Wilderness use in the year 2000: societal changes that influence human relationships with wilderness

    Science.gov (United States)

    Alan E. Watson

    2000-01-01

    The purpose of this paper is to extend a synthesis of knowledge about wilderness visitors and their visits developed in 1985. At that time, visitor research was in decline, and there was very little ability to understand trends. Over the last 15 years, wilderness visitor research has been initiated at many places in the U.S. where no previous studies had been completed...

  5. Magazines as wilderness information sources: assessing users' general wilderness knowledge and specific leave no trace knowledge

    Science.gov (United States)

    John J. Confer; Andrew J. Mowen; Alan K. Graefe; James D. Absher

    2000-01-01

    The Leave No Trace (LNT) educational program has the potential to provide wilderness users with useful minimum impact information. For LNT to be effective, managers need to understand who is most/least aware of minimum impact practices and how to expose users to LNT messages. This study examined LNT knowledge among various user groups at an Eastern wilderness area and...

  6. Mine and prospect map of the Vermilion Cliffs-Paria Canyon Instant Study Area and adjacent wilderness areas, Coconino County, Arizona, and Kane County, Utah

    Science.gov (United States)

    Lane, Michael

    1983-01-01

    Vermilion Cliffs-Paria Canyon Instant Study Area and adjacent wilderness areas are mostly in Coconino County Ariz., but extend into Kane County, Utah. The area studied in this report encompasses about 560 mi2 (1,450 km2). The study area includes the established Paria Canyon Primitive and Vermilion Cliffs Natural Areas between U.S. Highways 89 and 89A.

  7. "Completely empowering": A qualitative study of the impact of technology on the wilderness experience in New Zealand

    Science.gov (United States)

    John D. Shultis

    2015-01-01

    Recent academic literature has expressed concern over the potential impact of the increasing types and levels of electronic (largely communication-related) technology brought by visitors into the wilderness. A key issue has been perceived changes in risktaking behavior by wilderness and backcountry users. Despite these concerns, extremely limited empirical assessment...

  8. Wilderness science: A historical perspective

    Science.gov (United States)

    David N. Cole

    2014-01-01

    Wilderness is a relatively new and powerful idea that is still finding its footing in the world of science. Although the intellectual history of wilderness can be traced farther back in time (Nash 2001), as a land classification wilderness is less than a century old, and it was just 50 years ago that wilderness was codified in legislation in the United States. While...

  9. Wilderness managers, wilderness scientists, and universities: A partnership to protect wilderness experiences in the Boundary Waters Canoe Area Wilderness

    Science.gov (United States)

    Alan E. Watson; Ann Schwaller; Robert Dvorak; Neal Christensen; William T. Borrie

    2013-01-01

    The Boundary Waters Canoe Area Wilderness (BWCAW) in northern Minnesota has a rich history of advocacy for protection as wilderness. In the 1950s, Sigurd Olsen best described the song of the wilderness in Minnesota's north country: "I have heard the singing in many places, but I seem to hear it best in the wilderness lake country of the Quetico-Superior,...

  10. The impact of wilderness and other wildlands on local economies and regional development trends

    Science.gov (United States)

    Gundars Rudzitis; Rebecca Johnson

    2000-01-01

    There have been few economic studies of the impact of wilderness on nearby communities. The few studies that have been carried out find relatively modest economic impacts on the surrounding communities by people who come to recreate in federally wilderness areas. However, studies find that people are moving to areas near federally designated wilderness and other...

  11. Where's the Wilderness in Wilderness Therapy?

    Science.gov (United States)

    Rutko, Ebony A.; Gillespie, Judy

    2013-01-01

    This article seeks to provide a review of the theoretical and empirical literature in the field of wilderness therapy, the intent of which is to gain a greater conceptual understanding of the importance of the physical environment in therapeutic intervention. A review and consolidation of the existing literature reveal that the theories used to…

  12. Balancing tradeoffs in the Denali Wilderness: an expanded approach to normative research using stated choice analysis

    Science.gov (United States)

    Steven R. Lawson; Robert Manning

    2002-01-01

    Wilderness experiences are thought to be comprised of or defined by three dimensions, including social, resource, and management conditions. Decisions about how to manage wilderness recreation in Denali National Park involve potential tradeoffs among the conditions of resource, social, and managerial attributes of the wilderness experience. This study expands the...

  13. Wistful wilderness

    NARCIS (Netherlands)

    Jansen, Peter; Stoep, van der Jan; Keulartz, Jozef; Jochemsen, Henk

    2017-01-01

    Based on in-depth interviews, this article presents findings of a study centred on public communication regarding Tiengemeten, a Dutch island previously occupied by farmers. An answer is sought to the question of how visitors to Tiengemeten evaluate, according to their own experiences, the discourse

  14. Visitor attitudes towards fire and wind disturbances in wilderness

    Science.gov (United States)

    Robert G. Dvorak; Erin D. Small

    2011-01-01

    This study examines visitor attitudes across the Boundary Waters Canoe Area Wilderness regarding the effects of natural disturbances on visitor planning and wilderness conditions. Visitors were intercepted at entry points and permit distribution locations during 2007. Results suggest that respondents were aware of recent wind and fire disturbances. Few respondents...

  15. The virtues of localism and arctic wilderness politics

    Science.gov (United States)

    James N. Gladden

    2007-01-01

    An analysis of co-managing structures and land use issues in three case studies of arctic wilderness politics shows that more formal and informal power sharing by government officials with local people results in less conflict. Greater input and control by nearby communities may also help to protect wilderness ecosystems and traditional values of northern cultures....

  16. A framework to evaluate proposals for scientific activities in wilderness

    Science.gov (United States)

    Peter Landres

    2010-01-01

    Every year, the four Federal wilderness management agencies - U.S. DOI Bureau of Land Management, Fish and Wildlife Service, National Park Service, and the USDA Forest Service - receive hundreds of proposals to conduct scientific studies within wilderness. There is no consistent and comprehensive framework for evaluating such proposals that accounts for the unique...

  17. Changing human relationships with nature: making and remaking wilderness science

    Science.gov (United States)

    Jill M. Belsky

    2000-01-01

    The paper identifies and discusses two major themes in wilderness social science. First, that wilderness studies (and its advocates) have been limited by an ontological tension between those who mainly approach the relationship between humans and nature on the basis of material factors and constraints and those who approach it through an examination of shifting...

  18. Attitudes toward roles in a wilderness education program

    Science.gov (United States)

    William W. Hendricks

    2000-01-01

    This study examined students’ attitudes toward the impact monster and the good guy roles in the impact monster skit and determined if attitudes differed by gender and grade level. In addition, differences in high- and low-involvement with the skit were analyzed. The impact monster skit is a popular wilderness education program designed to teach appropriate wilderness...

  19. Origin of political conflict in Arctic wilderness areas

    Science.gov (United States)

    James N. Gladden

    2002-01-01

    There are several important factors related to political conflict associated with arctic wilderness areas: scientific studies, economic interests, ethnic identities, geographic differences, and national histories. How groups with an interest in these wilderness areas inject their values into these factors stimulates political debate with each other and with stewarding...

  20. Conflicting goals of wilderness management: natural conditions vs. natural experiences

    Science.gov (United States)

    Alan E. Watson; Michael J. Niccolucci

    1995-01-01

    Beliefs and attitudes underlying wilderness visitors’ support for use restrictions were studied. Some evidence shows that in overused places visitors cite both protection of the resource and the wilderness experience as reasons for supporting restrictions. The research reported here provides the opportunity to assess the relative contribution of each of these reasons,...

  1. Wilderness experiences as sanctuary and refuge from society

    Science.gov (United States)

    William T. Borrie; Angela M. Meyer; Ian M. Foster

    2012-01-01

    Wilderness areas provide a sanctuary from human domination, for the plants and animals that exist there and also for the visitors who come there to escape the demands and pressures of modern society. As a place of refuge and sanctuary, we have found wilderness to allow experiences of connection, engagement and belonging. Two studies help illustrate the role of wildness...

  2. Wilderness management dilemmas: fertile ground for wilderness management research

    Science.gov (United States)

    David N. Cole; William E. Hammitt

    2000-01-01

    Increasingly, wilderness managers must choose between the objective of wildness (“untrammeled” wilderness) and the objectives of naturalness and solitude. This dilemma has surfaced with awareness of the pervasiveness of human influence in wilderness and that regulation is often the only way to maintain outstanding opportunities for solitude. Should we trammel...

  3. Humans apart from nature? Wilderness experience and the Wilderness Act

    Science.gov (United States)

    Mark Fincher

    2012-01-01

    Wilderness managers are faced with making judgments about the appropriateness of different types of recreational activities. One of the criteria they use is wilderness dependence-the notion that an activity should be allowed, or privileged if rationing is required, if it depends on a wilderness setting for much of its value. Inherent in this concept is the idea that...

  4. Wilderness fire management planning guide

    Science.gov (United States)

    William C. Fischer

    1984-01-01

    Outlines a procedure for fire management planning for parks; wilderness areas; and other wild, natural, or essentially undeveloped areas. Discusses background and philosophy of wilderness fire management, planning concepts, planning elements, and planning methods.

  5. Mineral resources of the Desolation Canyon, Turtle Canyon, and Floy Canyon Wilderness Study Areas, Carbon Emery, and Grand counties, Utah

    International Nuclear Information System (INIS)

    Cashion, W.B.; Kilburn, J.E.; Barton, H.N.; Kelley, K.D.; Kulik, D.M.; McDonnell, J.R.

    1990-09-01

    This paper reports on the Desolation Canyon, Turtle Canyon, and Floy Canyon Wilderness Study Areas which include 242,000 acres, 33,690 acres, and 23,140 acres. Coal deposits underlie all three study areas. Coal zones in the Blackhawk and Nelsen formations have identified bituminous coal resources of 22 million short tons in the Desolation Canyon Study Area, 6.3 million short tons in the Turtle Canyon Study Area, and 45 million short tons in the Floy Canyon Study Area. In-place inferred oil shale resources are estimated to contain 60 million barrels in the northern part of the Desolation Canyon area. Minor occurrences of uranium have been found in the southeastern part of the Desolation Canyon area and in the western part of the Floy Canyon area. Mineral resource potential for the study areas is estimated to be for coal, high for all areas, for oil and gas, high for the northern tract of the Desolation Canyon area and moderate for all other tracts, for bituminous sandstone, high for the northern part of the Desolation Canyon area, and low for all other tracts, for oil shale, low in all areas, for uranium, moderate for the Floy Canyon area and the southeastern part of the Desolation Canyon area and low for the remainder of the areas, for metals other than uranium, bentonite, zeolites, and geothermal energy, low in all areas, and for coal-bed methane unknown in all three areas

  6. Values of the urban wilderness

    Science.gov (United States)

    Paticia L. Winter

    2013-01-01

    Wilderness is widely supported by the American public (Campaign for America’s Wilderness 2003) and provides myriad ecosystem services and other benefits (Schuster and others 2005, Williams and Watson 2007). Wilderness services and benefits deemed important to the public include use (such as recreation) and non-usevalues (such as scenery appreciation) (Brown...

  7. The Economic Value of Wilderness

    Science.gov (United States)

    Claire Payne; J. Michael Bowker; Patrick C. Reed

    1991-01-01

    Wilderness is an integral part of the Federal land system. Since its inception in 1964, the National Wilderness Preservation System (NWPS) has grown to more than ninety million acres. It presents a source of controversy to many in society, while to many others its existence is virtually unknown. Among those who have an explicit interest in wilderness, there...

  8. Climate change: Wilderness's greatest challenge

    Science.gov (United States)

    Nathan L. Stephenson; Connie Millar

    2014-01-01

    Anthropogenic climatic change can no longer be considered an abstract possibility. It is here, its effects are already evident, and changes are expected to accelerate in coming decades, profoundly altering wilderness ecosystems. At the most fundamental level, wilderness stewards will increasingly be confronted with a trade-off between untrammeled wilderness character...

  9. Wilderness uses, users, values, and management

    Science.gov (United States)

    Alan Watson; David N. Cole; Gregory T. Friese; John C. Hendee; Peter Landres; Thoms F. Geary; Gerald L. Stokes; Jeff Jarvis; Wes Henry

    1999-01-01

    This chapter is a compendium of six papers written to add further depth to our national assessment of Wilderness, begun with the previous chapter. The first three papers summarize research and experience about the identity of Wilderness users and how Wilderness is used, use of Wilderness for personal growth, and changes of Wilderness values. The second three papers...

  10. Mapping wilderness character in Olympic National Park

    Science.gov (United States)

    James Tricker; Peter Landres; Jennifer Chenoweth; Roger Hoffman; Scott Ruth

    2013-01-01

    The Olympic Wilderness was established November 16, 1988 when President Ronald Reagan signed the Washington Park Wilderness Act. A total of 876,447 acres or 95% of Olympic National Park (OLYM) was designated as wilderness and became a part of the National Wilderness Preservation System, wherein wilderness character would be preserved. The purpose of this project was to...

  11. An Exploratory Study of the Restorative Benefits of Hiking in Wilderness Solitude and Its Relationship to Job Satisfaction

    Science.gov (United States)

    Ellison, Mark Andrew

    2010-01-01

    The purpose of this exploratory research was to examine the relationship between the restorative benefits of hiking in wilderness solitude (RBHWS) and job satisfaction. This research is a jumping off point, intended to guide future research on the RBHWS, and the practical utilization of this in human resource development. This research sought to…

  12. A monitoring strategy for the national wilderness preservation system

    Science.gov (United States)

    Peter B. Landres; David N. Cole; Alan E Watson

    1994-01-01

    In 1964, the Wilderness Act (P.L. 88-577) established the National Wilderness Preservation System (NWPS), currently composed of nearly 39 million hectares in 564 separate units, ranging in size from 2.4 he&ares to 3.5 million hectares. The purpose of the NWPS is “. . . to secure for the American people of present and future generations the benefits of an enduring...

  13. Landscape development, forest fires, and wilderness management.

    Science.gov (United States)

    Wright, H E

    1974-11-08

    fire. Major fires occur so often that the vegetation pattern is a record of fire history. All elements in the forest mosaic are in various stages of postfire succession, with only a few approaching climax. Fire interrupts the successful sequence toward climax. Geomorphic and edaphic factors in vegetational distribution are largely submerged by the fire regime, except for bog and other lowland vegetation. Fire recycles nutrients and renews succession. Nevertheless, despite the fire regime, the resulting long-term equilibrium of the forest mosaic, characterized by severe and irregular fluctuations of individual elements, reflects regional climate. In the BWCA and the western mountains, large virgin forests can be preserved for study and wilderness recreation. These wilderness areas must be managed to return them to the natural equilibrium which has been disturbed by 50 to 70 years of fire suppression. The goal should be to maintain virgin forests as primeval wilderness. This can be done by management that permits fire and other natural processes to determine the forest mosaic. Mechanized tree-felling and other human disturbances should be kept to an absolute minimum. Natural landforms also should be preserved for study and for certain nondestructive recreational activities. It is somewhat late for the Colorado River and other rivers of the West, because natural balances are upset by drainagebasin disturbances. Modification of plant cover on hillslopes changes infiltration and erosion rates and thus the stream discharge and sediment load, so the stream balance is altered from primeval conditions. Scenic Rivers legislation should thus be used to restore certain river systems and their drainage basins. Mountain meadows, badlands, desert plains, and patterned permafrost terrain are extremely fragile and sensitive. Intricate stream and weathering processes leave patterns easily obliterated by mechanized vehicles. Tire tracks can last for decades or centuries. The mineral

  14. Sanitation in wilderness: Balancing minimum tool policies and wilderness values

    Science.gov (United States)

    Paul R. Lachapelle

    2000-01-01

    Officials with the four wilderness managing agencies are faced with balancing wilderness preservation values and the minimum tool policies of their respective agencies. One example is the management of sanitation, particularly human waste and the often intrusive infrastructure that accompanies its treatment and disposal. Because the treatment and disposal of human...

  15. Naturalness and wilderness: the dilemma and irony of managing wilderness

    Science.gov (United States)

    Peter B. Landres; Mark W. Brunson; Linda Merigliano; Charisse Sydoriak; Steve Morton

    2000-01-01

    This paper summarizes a dialogue session that focused on two concepts that strongly influence nearly all wilderness management: wildness and naturalness. The origin and value of these concepts are discussed, as well as the dilemma and irony that arises when wilderness managers contemplate manipulating the environment to restore naturalness at the risk of reducing...

  16. A database application for wilderness character monitoring

    Science.gov (United States)

    Ashley Adams; Peter Landres; Simon Kingston

    2012-01-01

    The National Park Service (NPS) Wilderness Stewardship Division, in collaboration with the Aldo Leopold Wilderness Research Institute and the NPS Inventory and Monitoring Program, developed a database application to facilitate tracking and trend reporting in wilderness character. The Wilderness Character Monitoring Database allows consistent, scientifically based...

  17. Mineral resources of the Hawk Mountain Wilderness Study Area, Honey County, Oregon

    International Nuclear Information System (INIS)

    Turrin, B.D.; Conrad, J.E.; Plouff, D.; King, H.D.; Swischer, C.C.; Mayerle, R.T.; Rains, R.L.

    1989-01-01

    The Hawk Mountain Wildeness Study Area in south-central Oregon is underlain by Miocene age basalt, welded tuff, and interbedded sedimentary rock. The western part of this study area has a low mineral resource potential for gold. There is a low mineral resource potential for small deposits of uranium in the sedimentary rocks. This entire study area has a low potential for geothermal and oil and gas resources. There are no mineral claims or identified resources in this study area

  18. The Aldo Leopold Wilderness Research Institute: a national wilderness research program in support of wilderness management

    Science.gov (United States)

    Vita Wright

    2000-01-01

    The Aldo Leopold Wilderness Research Institute strives to provide scientific leadership in developing and applying the knowledge necessary to sustain wilderness ecosystems and values. Since its 1993 dedication, researchers at this federal, interagency Institute have collaborated with researchers and managers from other federal, academic and private institutions to...

  19. Wilderness and woodland ranchers in California: A total income case study of public grazing permits and their impacts on conservation

    Science.gov (United States)

    Oviedo Pro, J. L.; Huntsinger, L.; Campos, P.; Caparros, A.

    2009-04-01

    Mediterranean woodlands in California are managed as agro-silvo-pastoral systems producing a number of commercial products as well as a huge variety of environmental services, including private amenities for the landowner. In many parts of the woodlands, grazing on government owned (public) lands has traditionally had an important role in private ranching. In recent decades the risk of conversion to alternative uses (such as urban development or vineyards) has threatened these woodlands due to the increasing opportunity costs of capital. Understanding the economy of these woodlands and the potential effects of public grazing policies on the total income perceived by the landowner is crucial when considering strategies attempting to slow or stop land use change. However, traditional cash-flow analyses are lacking crucial information needed to understand all the elements that have an important role in the economic decisions that landowners make about their woodlands. For more than half a century, the use of public lands by private ranchers has been one of the most controversial debates in the American west. Wilderness conservationist groups have denounced grazing as destructive and argue for the removal of any kind of livestock. Ranchers have fought for their right to hold public grazing leases, arguing that they are crucial for the continuity of private ranching and consequently for the conservation of extensive rangeland habitat that otherwise could be converted to alternative uses. In this study, we apply the Agroforestry Accounting System (AAS) methodology to a California oak woodland case study to estimate the total private income generated in an accounting period. The presented case study is characterized by a household economy with self-employed labour and with part of the grazing dependent on public land leases. The AAS methodology extends traditional cash-flow analysis in order to estimate the total private income that would accurately explain the woodland

  20. Technical guide for monitoring selected conditions related to wilderness character

    Science.gov (United States)

    Peter Landres; Steve Boutcher; Liese Dean; Troy Hall; Tamara Blett; Terry Carlson; Ann Mebane; Carol Hardy; Susan Rinehart; Linda Merigliano; David N. Cole; Andy Leach; Pam Wright; Deb Bumpus

    2009-01-01

    The purpose of monitoring wilderness character is to improve wilderness stewardship by providing managers a tool to assess how selected actions and conditions related to wilderness character are changing over time. Wilderness character monitoring provides information to help answer two key questions about wilderness character and wilderness stewardship: 1. How is...

  1. Economic values of wilderness recreation and passive use: what we think we know at the beginning of the 21st century

    Science.gov (United States)

    John B. Loomis

    2000-01-01

    Two techniques are used to estimate the economic value of recreation and off-site passive use values of wilderness. Using an average value per recreation day ($39), the economic value of wilderness recreation is estimated to be $574 million annually. Generalizing the two Western passive use values studies we estimate values of Western wilderness in the lower 48 states...

  2. Wilderness medicine in southern Africa

    African Journals Online (AJOL)

    injuries, and trauma care, whereas jungle expeditions require an understanding ... series will address expedition medicine, psychological and human factors, and ... Dead. Fig. 1. Cumulative wilderness rescue statistics from 1900 to early 2017,.

  3. An on-line narrative of Colorado wilderness: Self-in-"cybernetic space"

    Science.gov (United States)

    Joseph G. Champ; Daniel R. Williams; Catherine M. Lundy

    2013-01-01

    The authors consider a new frontier for the study of wilderness recreation experience, an increasingly common form of blog known as online trip reports. Analysis and discussion in this article is the result of collecting and reflecting upon more than 300 trip reports focused on wilderness areas in the state of Colorado. The authors present a case study of one trip...

  4. Guides to Sustainable Connections? Exploring Human-Nature Relationships among Wilderness Travel Leaders

    Science.gov (United States)

    Grimwood, Bryan S. R.; Haberer, Alexa; Legault, Maria

    2015-01-01

    This paper explores and critically interprets the role wilderness travel may play in fostering environmental sustainability. The paper draws upon two qualitative studies that sought to understand human-nature relationships as experienced by different groups of wilderness travel leaders in Canada. According to leaders involved in the studies,…

  5. The multiple values of wilderness

    Science.gov (United States)

    H. Ken Cordell; John C. Bergstrom; J. Michael Bowker

    2005-01-01

    Gone are those of the 1950s and early 1960s who championed preserving wild lands and who influenced and saw through the birth of the National Wilderness Preservation System (NWPS). Gone too are myriad eager managers and proponents of wild land protection of the late 1960s and 1970s who helped rear the fledgling Wilderness1 system and bring it into adolescence by adding...

  6. Managing for wilderness experiences in the 21st Century: Responding to the recent wilderness critique

    Science.gov (United States)

    Joseph W. Roggenbuck

    2012-01-01

    This essay describes five major critiques of the wilderness idea and how wilderness managers might shape experience opportunities in wilderness in response. These challenges include the notions that the wilderness idea separates people from nature, that it denies the human story in "pristine" lands, that it privileges a kind of recreation favored by elites...

  7. Preventing Family and Educational Disconnection through Wilderness-Based Therapy Targeting Youth at Risk

    Science.gov (United States)

    Ronalds, Lisa; Allen-Craig, Sandy

    2008-01-01

    In an effort to address the issue of youth homelessness in Australia, Regional Extended Family Services (REFS) have developed a wilderness-based therapeutic intervention. REFS aim to provide early intervention services for young people at risk of homelessness, and their families. This study examined the outcomes of the REFS wilderness program by…

  8. Understanding place meanings for wilderness: Personal and community values at risk

    Science.gov (United States)

    Kari Gunderson

    2006-01-01

    Information about human relationships with wilderness is important for wilderness management decisions, including decisions pertaining to the use of wildland fire. In a study about meanings attached to a national forest, local residents were asked to identify places they valued on the forest, why they valued them, and how fuel treatments affected those values. Local...

  9. Bureau of Land Management Wilderness Areas

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — This dataset is meant to depict wilderness areas within the state of New Mexico managed by the Bureau of Land Management These wilderness areas are officially...

  10. The triumph of politics over wilderness science

    Science.gov (United States)

    Craig W. Allin

    2000-01-01

    The National Wilderness Preservation System reflects the triumph of politics over science. The history of wilderness allocation has reflected political rather than scientific sensibilities. The preeminence of politics over science extends to wilderness management as well and is illustrated here by representative examples from the modern history of Yellowstone National...

  11. Benefits of nonfacilitated uses of wilderness

    Science.gov (United States)

    Joseph W. Roggenbuck; B. L. Driver

    2000-01-01

    Using the taxonomy of personal benefits attributed to wilderness and developed for the 1985 national wilderness conference, this paper summarizes the research since published on the benefits of nonfacilitated uses of wilderness. It describes recent developments in theory and methods regarding leisure experiences and discusses the implications of these developments for...

  12. Preservation of wilderness areas in Europe

    Directory of Open Access Journals (Sweden)

    Zoltán Kun

    2013-06-01

    Full Text Available A unique momentum has been created over the past few years for strengthening the protection of wilderness in Europe. Policy makers started to pay attention to the importance of truly untouched and non-managed areas and the European Parliament adopted a special report on wilderness in February 2009. The report was followed by the EC Presidency Conference in Prague, May 2009, on Wilderness Areas. The most important outcome of this event was the approval of the ‘Agenda for Wilderness’, which eventually led to the inclusion of wilderness in the new EU Biodiversity Strategy. This paper argues that these political successes have yet to be put into practice. Threats to wilderness areas are still increasing and there have been no improvements in the management of these areas. There are emerging threats, especially from tree felling and mining, which is driven by increase in commodity prices. In order to save the last pieces of wilderness in Europe and utilize the current opportunities to restore wilderness areas, science and field conservation must develop a common Wilderness Research Agenda for Europe. The main questions are: (i What are the ecosystem services and benefits that humans obtain for wilderness areas? (ii What is the potential contribution of such wilderness areas for reducing biodiversity loss, halt species extinctions and support biodiversity restoration in Europe? (iii What is the social perception of wilderness in different countries and across different sectors of society? (iv What should be considered wilderness in a densely populated area such as Europe?

  13. Wilderness - between the promise of hell and paradise: A cultural-historical exploration of a Dutch National Park

    Science.gov (United States)

    Koen Arts; Anke Fischer; Rene van der Wal

    2011-01-01

    ‘Wilderness' is often seen as an ideal state in contemporary debates on ecological restoration. This paper asks what is left of ‘wilderness' in present-day Western Europe and explores this question by drawing on a case study of the Hoge Veluwe National Park in the Netherlands. An overview of intellectual histories of wilderness ideas is used as a backdrop to...

  14. GOAT ROCKS WILDERNESS AND ADJACENT ROADLESS AREAS, WASHINGTON.

    Science.gov (United States)

    Church, S.E.; Close, T.J.

    1984-01-01

    The Goat Rocks Wilderness and adjacent roadless areas are a rugged, highly forested, scenic area located on the crest of the Cascade Range in south-central Washington. Several mineral claims have been staked in the area. Mineral surveys were conducted. Geochemical, geophysical, and geologic investigations indicate that three areas have probable mineral-resource potential for base metals in porphyry-type deposits. Available data are not adequate to permit definition of the potential for oil and gas. There is little likelihood for the occurrence of other kinds of energy resources in the area. Evaluation of resource potential in the three areas identified as having probable mineral-resource potential could be improved by more detailed geochemical studies and geologic mapping.

  15. Case Study for the ARRA-funded Ground Source Heat Pump (GSHP) Demonstration at Wilders Grove Solid Waste Service Center in Raleigh, NC

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Xiaobing [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Malhotra, Mini [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Xiong, Zeyu [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-11-01

    High initial costs and lack of public awareness of ground-source heat pump (GSHP) technology are the two major barriers preventing rapid deployment of this energy-saving technology in the United States. Under the American Recovery and Reinvestment Act (ARRA), 26 GSHP projects have been competitively selected and carried out to demonstrate the benefits of GSHP systems and innovative technologies for cost reduction and/or performance improvement. This paper highlights the findings of a case study of one of the ARRA-funded GSHP demonstration projects, a distributed GSHP system for providing all the space conditioning, outdoor air ventilation, and 100% domestic hot water to the Wilders Grove Solid Waste Service Center of City of Raleigh, North Carolina. This case study is based on the analysis of measured performance data, construction costs, and simulations of the energy consumption of conventional central heating, ventilation, and air-conditioning (HVAC) systems providing the same level of space conditioning and outdoor air ventilation as the demonstrated GSHP system. The evaluated performance metrics include the energy efficiency of the heat pump equipment and the overall GSHP system, pumping performance, energy savings, carbon emission reductions, and cost-effectiveness of the GSHP system compared with conventional HVAC systems. This case study also identified opportunities for reducing uncertainties in the performance evaluation and improving the operational efficiency of the demonstrated GSHP system.

  16. Wilderness, biodiversity, and human health

    Science.gov (United States)

    Daniel L. Dustin; Keri A. Schwab; Kelly S. Bricker

    2015-01-01

    This paper illustrates how wilderness, biodiversity, and human health are intertwined. Proceeding from the assumption that humankind is part of, rather than apart from, nature, health is re-imagined as a dynamic relationship that can best be conceived in broad ecological terms. Health, from an ecological perspective, is a measure of the wellness of the individual and...

  17. Funding strategies for wilderness management

    Science.gov (United States)

    Carolyn Alkire

    2000-01-01

    Funding wilderness protection will continue to be a challenge for public land managers. With continuing competition for federal funds and balanced budget goals, other sources of funds may be necessary to supplement annual federal appropriations. This paper identifies and evaluates five potential funding strategies and provides examples of each that are currently in use...

  18. Mount Zirkel Wilderness and vicinity, Colorado

    International Nuclear Information System (INIS)

    Snyder, G.L.; Patten, L.L.

    1984-01-01

    Several areas of metallic and nonmetallic mineralization have been identified from surface occurrences within the Mount Zirkel Wilderness and vicinity, Colorado. Three areas of probable copper-lead-zinc-silver-gold resource potential, two areas of probable chrome-platinum resource potential, four areas of probable uranium-thorium resource potential, two areas of probable molybdenum resource potential, and one area of probable fluorspar potential were identified by studies in 1965-1973 by the USGS and USBM. No potential for fossil fuel or geothermal resources was identified

  19. Wilderness at arm's length: On the outside looking in at special provisions in wilderness

    Science.gov (United States)

    Alan E. Watson

    2012-01-01

    While there is a long history of research on factors influencing wilderness recreation visitor experiences, there has been little focused research to understand the experiences of users visiting wilderness under legislative special provisions or the impact of these special provisions on wilderness recreation visitors. There are some exceptions. For example, contrasting...

  20. Do recreation motivations and wilderness involvement relate to support for wilderness management? A segmentation analysis

    Science.gov (United States)

    Troy E. Hall; Erin Seekamp; David Cole

    2010-01-01

    Surveys show relatively little support for use restrictions to protect wilderness experiences. However, such conclusions based on aggregate data could hide important differences among visitors. Visitors with more wilderness-dependent trip motives were hypothesized to be more supportive of use restrictions. Using survey data from visitors to 13 wildernesses, cluster...

  1. Book review: The Wilderness Debate Rages On: Continuing the Great New Wilderness Debate

    Science.gov (United States)

    Peter Landres

    2009-01-01

    The Wilderness Debate Rages On is a collection of mostly previously published papers about the meaning, value, and role of wilderness and continues the discussion that was propelled by the editors' previous book The Great New Wilderness Debate (also a collection of papers) published in 1998. The editors state that this sequel to their previous book is mandated...

  2. 77 FR 56859 - Federal Register Notification of Redesignation of Potential Wilderness as Wilderness, Ross Lake...

    Science.gov (United States)

    2012-09-14

    ... Register Notification of Redesignation of Potential Wilderness as Wilderness, Ross Lake National Recreation..., Ross Lake National Recreation Area, and Lake Chelan National Recreation Area as the Stephen Mather... acres of potential wilderness within Ross Lake National Recreation Area, including approximately 1,667...

  3. Public values of the Antarctic wilderness: A comparison of university students in Spain and the United States

    Science.gov (United States)

    John Peden; Tina Tin; Javier Benayas; Luis Pertierra; Pablo Tejedo; Jessica O' Reilly; Kees Bastmeijer; Pat Maher

    2015-01-01

    This paper summarizes preliminary results of a research study that investigated university students' perceptions of Antarctic wilderness and reports on discussions of these results at a workshop held at the 10th World Wilderness Congress. The purpose of the research study was to determine whether nationality and cultural differences were associated with beliefs...

  4. The Wilderness Expedition: An Effective Life Course Intervention to Improve Young People's Well-Being and Connectedness to Nature

    Science.gov (United States)

    Barton, Jo; Bragg, Rachel; Pretty, Jules; Roberts, Jo; Wood, Carly

    2016-01-01

    It is well understood that wilderness expeditions improve well-being; however, there is little supporting quantitative data. The aim of this study was to measure the impact of wilderness expeditions on self-esteem (SE) and connectedness to nature (CN) and assess whether benefits varied according to participant and expedition characteristics. SE…

  5. Wilderness Recreation Demand: A Comparison of Travel Cost and On-Site Cost Models

    Science.gov (United States)

    J.M. Bowker; A. Askew; L. Seymour; J.P. Zhu; D. English; C.M. Starbuck

    2009-01-01

    This study used travel cost and on-site day cost models, coupled with the Forest Service’s National Visitor Use Monitoring data, to examine the demand for and value of recreation access to designated Wilderness.

  6. Wilderness Medical Society practice guidelines for the use of epinephrine in outdoor education and wilderness settings: 2014 update.

    Science.gov (United States)

    Gaudio, Flavio G; Lemery, Jay; Johnson, David E

    2014-12-01

    The Epinephrine Roundtable took place on July 27, 2008, during the 25th Annual Meeting of the Wilderness Medical Society (WMS) in Snowmass, CO. The WMS convened this roundtable to explore areas of consensus and uncertainty in the field treatment of anaphylaxis. Panelists were selected on the basis of their relevant academic or professional experience. There is a paucity of data that address the treatment of anaphylaxis in the wilderness. Anaphylaxis is a rare disease, with a sudden onset and drastic course that does not lend itself to study in randomized, controlled trials. Therefore, the panel endorsed the following position based on the limited available evidence and review of published articles, as well as expert consensus. The position represents the consensus of the panelists and is endorsed by the WMS. In 2014, the authors reviewed relevant articles published since the Epinephrine Roundtable. The following is an updated version of the original guidelines published in Wilderness & Environmental Medicine 2010;21(4):185-187. Copyright © 2014 Wilderness Medical Society. Published by Elsevier Inc. All rights reserved.

  7. Monitoring to Protect the Character of Individual Wildernesses

    Science.gov (United States)

    David N. Cole

    2006-01-01

    A primary goal of wilderness stewardship is to protect individual wilderness areas from most anthropogenic change. Numerous agents of change threaten to degrade wilderness character. These agents of change are both internal (for example, grazing) and external (for example, polluting industries) to wilderness. They can be activities (for example, recreation use) or the...

  8. Navigating confluences: revisiting the meaning of "wilderness experience"

    Science.gov (United States)

    Karen M. Fox

    2000-01-01

    Concepts of wilderness and “wilderness experience” merge into a grand or metanarrative that describes how “wilderness experience” is and provides a normalized reference point for values, beliefs, actions, and choices. This paper engages and juxtaposes critiques by scholars and authors representing nondominant perspectives with the North American, wilderness...

  9. Long-range Rocky Flats utilization study

    International Nuclear Information System (INIS)

    1983-02-01

    The purpose of this Study was to provide information concerning the Rocky Flats Plant and its operations that will be useful to the Nation's decision-makers in determining the long-range future of the Plant. This Study was conducted under the premise that national defense policy must be supported and, accordingly, the capabilities at Rocky Flats must be maintained there or at some other location(s). The Study, therefore, makes no attempt to speculate on how possible future changes in national defense policy might affect decisions regarding the utilization of Rocky Flats. Factors pertinent to decisions regarding Rocky Flats, which are included in the Study, are: physical condition of the Plant and its vulnerabilities to natural phenomena; risks associated with plutonium to Plant workers and the public posed by postulated natural phenomena and operational accidents; identification of alternative actions regarding the future use of the Rocky Flats Plant with associated costs and time scales; local socioeconomic impacts if Rocky Flats operations were relocated; and potential for other uses if Rocky Flats facilities were vacated. The results of the tasks performed in support of this Study are summarized in the context of these five factors

  10. Wilderness recreation use: the current situation

    Science.gov (United States)

    Joseph W. Roggenbuck; Alan E. Watson

    1989-01-01

    The total amount of recreational use of the National Wilderness Preservation System is currently at about 14.5 million visitor days per annum. Trends indicate a stable or declining overall use; use on a per acre basis is declining. The common stereotype of the wilderness user as young, wealthy, urban, leisured, and a nonresident of the State or region is largely...

  11. Economic growth, ecological economics, and wilderness preservation

    Science.gov (United States)

    Brian Czech

    2000-01-01

    Economic growth is a perennial national goal. Perpetual economic growth and wilderness preservation are mutually exclusive. Wilderness scholarship has not addressed this conflict. The economics profession is unlikely to contribute to resolution, because the neoclassical paradigm holds that there is no limit to economic growth. A corollary of the paradigm is that...

  12. The natural ecological value of wilderness

    Science.gov (United States)

    H. Ken Cordell; Danielle Murphy; Kurt H. Riitters; J.E. Harvard

    2005-01-01

    In Chapters 7 through 10 of this book, we examined the social and economic benefits or values from Wilderness. In this chapter, we attempt to examine the natural ecological values of Wilderness. We define ecological value generally as the level of benefits that the space. water, minerals, biota, and all other factors that make up natural ecosystems provide to support...

  13. Backcountry as an alternative to wilderness?

    Science.gov (United States)

    John H. Schomaker; Thomas R. Glassford

    1982-01-01

    Backcountry areas have been suggested as recreation alternatives to wilderness. A problem with the concept is that areas which could be managed as backcountry are already used by recreationists. Visitors to a wilderness in Oregon and to a nondesignated roadless area in northern Idaho held many of the same values and sought the same kind of experiences. Therefore....

  14. Challenges in protecting the wilderness of Antarctica

    Science.gov (United States)

    Tina Tin; Alan Hemmings

    2011-01-01

    Since 1998, the wilderness values of Antarctica have been among those given legal recognition under the Protocol on Environmental Protection to the Antarctic Treaty. Despite the legal obligation, on-the-ground implementation has attracted little interest. The term "wilderness" and its consequential operational implication, including the designation of...

  15. National Wilderness Preservation System database: key attributes and trends, 1964 through 1999

    Science.gov (United States)

    Peter Landres; Shannon Meyer

    2000-01-01

    The Wilderness Act of 1964 established a National Wilderness Preservation System, and this publication is a compilation of selected information about every wilderness within this System. For each wilderness, the following information is given: legally correct wilderness name; public law that established the wilderness; date the enabling law was signed by the President...

  16. BENEFITS OF WILDERNESS EXPANSION WITH EXCESS DEMAND FOR INDIAN PEAKS

    OpenAIRE

    Walsh, Richard G.; Gilliam, Lynde O.

    1982-01-01

    The contingent valuation approach was applied to the problem of estimating the recreation benefits from alleviating congestion at Indian Peaks wilderness area, Colorado. A random sample of 126 individuals were interviewed while hiking and backpacking at the study site in 1979. The results provide an empirical test and confirmation of the Cesario and Freeman proposals that under conditions of excess recreational demand for existing sites, enhanced opportunities to substitute newly designated s...

  17. MOUNT HOOD WILDERNESS AND ADJACENT AREAS, OREGON.

    Science.gov (United States)

    Keith, T.E.C.; Causey, J.D.

    1984-01-01

    A mineral survey of the Mount Hood Wilderness, Oregon, was conducted. Geochemical data indicate two areas of substantiated mineral-resource potential containing weak epithermal mineralization: an area of the north side of Zigzag Mountain where vein-type lead-zinc-silver deposits occur and an area of the south side of Zigzag Mountain, where the upper part of a quartz diorite pluton has propylitic alteration associated with mineralization of copper, gold, silver, lead, and zinc in discontinuous veins. Geothermal-resource potential for low- to intermediate-temperature (less than 248 degree F) hot-water systems in the wilderness is probable in these areas. Part of the wilderness is classified as a Known Geothermal Resource Area (KGRA), which is considered to have probable geothermal-resource potential, and two parts of the wilderness have been included in geothermal lease areas.

  18. Estimated impact of global population growth on future wilderness extent

    Science.gov (United States)

    Dumont, E.

    2012-06-01

    Wilderness areas in the world are threatened by the environmental impacts of the growing global human population. This study estimates the impact of birth rate on the future surface area of biodiverse wilderness and on the proportion of this area without major extinctions. The following four drivers are considered: human population growth (1), agricultural efficiency (2), groundwater drawdown by irrigation (3), and non-agricultural space used by humans (buildings, gardens, roads, etc.) (4). This study indicates that the surface area of biodiverse unmanaged land will reduce with about 5.4% between 2012 and 2050. Further, it indicates that the biodiverse land without major extinctions will reduce with about 10.5%. These percentages are based on a commonly used population trajectory which assumes that birth rates across the globe will reduce in a similar way as has occurred in the past in many developed countries. Future birth rate is however very uncertain. Plausible future birth rates lower than the expected rates lead to much smaller reductions in surface area of biodiverse unmanaged land (0.7% as opposed to 5.4%), and a reduction in the biodiverse land without major extinctions of about 5.6% (as opposed to 10.5%). This indicates that birth rate is an important factor influencing the quality and quantity of wilderness remaining in the future.

  19. A special issue of the Journal of Forestry - Wilderness science and its role in wilderness stewardship

    Science.gov (United States)

    Susan F. Fox

    2016-01-01

    This special issue of the Journal of Forestry provides an overview of America’s National Wilderness Preservation System and highlights the important role that science serves in informing wilderness stewardship. The lead authors of the articles in this volume selected the Journal because it is highly respected and widely circulated among foresters and federal...

  20. Mapping tradeoffs in values at risk at the interface between wilderness and non-wilderness lands

    Science.gov (United States)

    Alan Watson; Roian Matt; Tim Waters; Kari Gunderson; Steve Carver; Brett Davis

    2009-01-01

    On the Flathead Indian Reservation in Montana, U.S., the Mission Mountains Tribal Wilderness is bordered by a buffer zone. To successfully improve forest health within that buffer zone and restore fire in the wilderness, the managing agency and the public need to work together to find solutions to increasingly threatening fuel buildups. A combination of qualitative,...

  1. An analysis of the outdoor recreation and wilderness situation in the United States, 1989-2040: A technical document supporting the 1989 USDA Forest Service RPA Assessment

    Science.gov (United States)

    H. Ken Cordell; John C. Bergstrom; Lawrence A. Hartmann; Donald B. K. English

    1990-01-01

    The Analysis of the Outdoor Recreation and Wilderness Situation in the United States is intended to build upon past studies and to establish a new and better information base on outdoor recreation and wilderness demand and supply. Also, this assessment answers several key questions which will help identify ways to meet demand through the year 2040. Specifically, it is...

  2. Variability of Diurnal Temperature Range During Winter Over Western Himalaya: Range- and Altitude-Wise Study

    Science.gov (United States)

    Shekhar, M. S.; Devi, Usha; Dash, S. K.; Singh, G. P.; Singh, Amreek

    2018-04-01

    The current trends in diurnal temperature range, maximum temperature, minimum temperature, mean temperature, and sun shine hours over different ranges and altitudes of Western Himalaya during winter have been studied. Analysis of 25 years of data shows an increasing trend in diurnal temperature range over all the ranges and altitudes of Western Himalaya during winter, thereby confirming regional warming of the region due to present climate change and global warming. Statistical studies show significant increasing trend in maximum temperature over all the ranges and altitudes of Western Himalaya. Minimum temperature shows significant decreasing trend over Pir Panjal and Shamshawari range and significant increasing trend over higher altitude of Western Himalaya. Similarly, sunshine hours show significant decreasing trend over Karakoram range. There exists strong positive correlation between diurnal temperature range and maximum temperature for all the ranges and altitudes of Western Himalaya. Strong negative correlation exists between diurnal temperature range and minimum temperature over Shamshawari and Great Himalaya range and lower altitude of Western Himalaya. Sunshine hours show strong positive correlation with diurnal temperature range over Pir Panjal and Great Himalaya range and lower and higher altitudes.

  3. Heat-related illness in the African wilderness

    African Journals Online (AJOL)

    Wilderness heat-related illnesses span a continuum of medical problems caused by ... of modern science, clothing technology, and an understanding of physiology ..... guidelines for wilderness emergency care, heat-related illnesses, and EAH ...

  4. Monitoring selected conditions related to wilderness character: a national framework

    Science.gov (United States)

    Peter Landres; Steve Boutcher; Linda Merigliano; Chris Barns; Denis Davis; Troy Hall; Steve Henry; Brad Hunter; Patrice Janiga; Mark Laker; Al McPherson; Douglas S. Powell; Mike Rowan; Susan Sater

    2005-01-01

    One of the central mandates of the 1964 Wilderness Act is that “each agency administering any area designated as wilderness shall be responsible for preserving the wilderness character of the area.” Although wilderness comprises about 20 percent of National Forest System lands (over 35 million acres), the agency lacks a way to evaluate progress in fulfilling this...

  5. Characteristics of wilderness users in outdoor recreation assessments

    Science.gov (United States)

    Alan E. Watson; H. Ken Cordell; Lawrence A. Hartmann

    1989-01-01

    Wilderness use is often subsumed under outdoor recreation participation in large-scale assessments. Participation monitoring has indicated, however, that wilderness use has been increasing faster than outdoor recreation use in general. In a sample of Forest Service wilderness and nonwildemess users during the summer of 1985, detailed expenditure, activity, and travel...

  6. Research needs for a better understanding of wilderness visitor experiences

    Science.gov (United States)

    Stephen F. McCool; Chad P. Dawson

    2012-01-01

    What information is needed to facilitate enhanced management of visitor experiences in wilderness? The final session of the workshop comprised a facilitated process with the 20 participants to identify research and information needs to support wilderness visitor experience management. The Wilderness Act and the previous presentations and discussions not only provided a...

  7. The contribution of natural fire management to wilderness fire science

    Science.gov (United States)

    Carol Miller

    2014-01-01

    When the federal agencies established policies in the late 1960s and early 1970s to allow the use of natural fires in wilderness, they launched a natural fire management experiment in a handful of wilderness areas. As a result, wildland fire has played more of its natural role in wilderness than anywhere else. Much of what we understand about fire ecology comes from...

  8. Wilderness values in America: Does immigrant status or ethnicity matter?

    Science.gov (United States)

    Cassandra Y. Johnson; J. Michael Bowker; John C. Bergstrom; H. Ken Cordell

    2004-01-01

    Little is known about the values immigrant groups or U.S.-born racial and ethnic minorities attribute to wilderness. However, the views of these groups are important to wilderness preservation because of increasing diversity along ethnic, cultural, and racial lines in the United States. We examine the proposition that wilderness is a social construction (valued...

  9. Shared wilderness, shared responsibility, shared vision: Protecting migratory wildlife

    Science.gov (United States)

    Will Meeks; Jimmy Fox; Nancy Roeper

    2011-01-01

    Wilderness plays a vital role in global and landscape-level conservation of wildlife. Millions of migratory birds and mammals rely on wilderness lands and waters during critical parts of their life. As large, ecologically intact landscapes, wilderness areas also play a vital role in addressing global climate change by increasing carbon sequestration, reducing...

  10. Frameworks for defining and managing the wilderness experience

    Science.gov (United States)

    Robert E. Manning

    2012-01-01

    A large and growing body of research on outdoor recreation and the wilderness experience has been conducted over the nearly 50 years since passage of the Wilderness Act of 1964. A number of conceptual and empirical frameworks have emerged from this body of knowledge that can be used to help define and manage the wilderness experience.

  11. Population growth, economic security, and cultural change in wilderness counties

    Science.gov (United States)

    Paul A. Lorah

    2000-01-01

    A familiar version of the “jobs versus the environment” argument asserts that wilderness areas limit economic growth by locking up potentially productive natural resources. Analysis of the development paths of rural Western counties shows that this is unlikely: the presence of Wilderness is correlated with income, employment and population growth. Similarly, Wilderness...

  12. The challenges and related strategies of planning for wilderness experiences

    Science.gov (United States)

    Kerri Cahill

    2012-01-01

    Planning is where science, public interests and management of wilderness areas come together. Unfortunately, science and information specifically supporting wilderness experiences, if any exists, is often perceived by managers as subjective, value laden, and hard to defend. This can sometimes lead to the tough decisions about providing high quality wilderness...

  13. Paleontological excavations in designated wilderness: theory and practic

    Science.gov (United States)

    Christopher V. Barns

    2000-01-01

    Wilderness is widely recognized as a valuable environment for scientific research, and it is generally assumed that this research will benefit the wilderness resource. But what if the research is of value only in understanding an ecosystem that has been extinct for 65 million years? What if thousands of pounds of material must be removed from the wilderness to conduct...

  14. Wilderness management principles: science, logical thinking or personal opinion?

    Science.gov (United States)

    David N. Cole

    1995-01-01

    Recreational use adversely affects the ecological integrity of wilderness. Wilderness managers face the challenge of keeping this loss of ecological integrity to minimal levels, a task that must be accomplished primarily through management of wilderness visitors. For the past 30 years, researchers have assisted managers by assessing problems associated with...

  15. Developing additional capacity for wilderness management: An international exchange program between South Africa and United States wilderness rangers

    Science.gov (United States)

    Pierre van den Berg; Ralph Swain

    2007-01-01

    Wilderness managers have limited time to initiate international exchanges. Additionally, the benefits to developing capacity for wilderness management around the globe are not significant enough to make the effort cost-effective. International assistance, including wilderness management exchange programs, is critical to protecting wild areas around the globe. Former...

  16. The evolution of wilderness social science and future research to protect experiences, resources, and societal benefits

    Science.gov (United States)

    Alan E. Watson; H. Ken Cordell; Robert Manning; Steven Martin

    2016-01-01

    The historic Wilderness Act celebrated its 50th anniversary in 2014, and wilderness social science shared a similar legacy. As paradoxical as it might seem, humans are an important part of wilderness, helping to define the very concept and representing an important component of wilderness use and management. Much of the past five decades of wilderness-related...

  17. Valuing values: A history of wilderness economics

    Science.gov (United States)

    J. M. Bowker; H. K. Cordell; N. C. Poudyal

    2014-01-01

    Prior to the U.S. Wilderness Act of 1964, economics as a science was hardly considered applicable to the types of human values set forth in this pathbreaking legislation. Economics was largely confined to the purchasing and labor decisions of households and firms as well the functioning of markets and economies. However, around this time, John Krutilla (1967) in his...

  18. 77 FR 55101 - National Wilderness Month, 2012

    Science.gov (United States)

    2012-09-06

    ... centuries, America's dramatic landscapes have attracted people from around the world to begin new lives and... launched the America's Great Outdoors Initiative, which laid the foundation for a comprehensive, community... invite all Americans to visit and enjoy our wilderness areas, to learn about their vast history, and to...

  19. Introducing Generation Y to the Wilderness

    Science.gov (United States)

    Taylor, Nicole; Gray, Tonia; Birrell, Carol

    2012-01-01

    Today's Western culture is characterized by high technology, time compression and a disconnection from the natural world. What happens when a group of young adult students who are firmly embedded within this world, embark on a 6-day unassisted wilderness experience? When divorced from the structural support of the everyday, and placed in an…

  20. 76 FR 55211 - National Wilderness Month, 2011

    Science.gov (United States)

    2011-09-07

    ... National Wilderness Month, 2011 By the President of the United States of America A Proclamation The mystery... of local economies, providing tourism and recreation revenue for communities. To help preserve our... agenda for the 21st century, with ideas stemming directly from the American people. We are working with...

  1. 78 FR 54747 - National Wilderness Month, 2013

    Science.gov (United States)

    2013-09-06

    ... the earth and its community of life are untrammeled by man, where man himself is a visitor who does not remain.'' Throughout our history, countless people have passed through America's most treasured... our wilderness areas, to learn about their vast history, and to aid in the protection of our precious...

  2. Wilderness and the U.S

    Science.gov (United States)

    Cassandra Johnson Gaither

    2014-01-01

    The perspective of Latin American and Asian immigrants on nature and wildlands is strikingly different from the view typical of European Americans. The very idea of outdoor recreation may be strange to the cultures from which many of these immigrants originate. This chapter addresses immigrant interaction with wildlands and wilderness by examining the environmental...

  3. Wilderness biology and conservation: future directions

    Science.gov (United States)

    Reed F. Noss

    2000-01-01

    The new conservation movement—uniting scientists and activists—seeks to relook at the role of protected land. The result is a redefining of terms, the encompassing of the concept of ecosystems, incorporating both scientific and nonscientific approaches to conservation, and reconsidering management. This philosophical essay speculates on the future of wilderness and...

  4. Some principles to guide wilderness campsite management

    Science.gov (United States)

    David N. Cole

    1990-01-01

    Seven principles, derived from research on wilderness campsites, are proposed: (1) campsite impacts are complex; (2) impact is inevitable with repetitive use of campsites; (3) impact occurs rapidly, recovery occurs slowly; (4) the relationship between use and impact is asymptotic; (5) certain sites are more durable than others; (6) certain users cause less impact than...

  5. Wilderness science in a time of change conference-Volume 4: Wilderness visitors, experiences, and visitor management; 1999 May 23-27; Missoula, MT

    Science.gov (United States)

    David N. Cole; Stephen F. McCool; William T. Borrie; Jennifer O' Loughlin

    2000-01-01

    Thirty-seven papers are presented on wilderness visitors, experiences, and visitor management. Three overview papers synthesize knowledge and research about wilderness visitors, management of visitor experiences, and wilderness recreation planning. Other papers contain the results of specific research projects on wilderness visitors, information and education, and...

  6. Fish communities of the Wilderness Lakes System in the southern Cape, South Africa

    Directory of Open Access Journals (Sweden)

    Alexis A. Olds

    2016-08-01

    Full Text Available The Wilderness Lakes System, a temporarily open and closed estuary with three associated lakes situated in the southern Cape region of South Africa, was sampled using a range of sampling gears to assess the fish community. A total of 25 species were sampled throughout the system, with the highest diversity in the Touw Estuary (23 species and the lowest in Langvlei (11 species. Estuary-associated marine species (13 species dominated species richness with smaller proportions of estuarine resident (7 species, freshwater (3 species and catadromous species (2 species. Estuarine resident species dominated the catch numerically. The size–class distribution of euryhaline marine species indicated that upon entering the Touw Estuary as juveniles, the fish move up the system towards Rondevlei where they appear to remain. Three freshwater species were recorded in the system, all of which are alien to the Wilderness Lakes System. Decreasing salinity in the upper lakes appears to be a driving factor in the distribution and increasing abundance of the freshwater fishes. Sampling followed a drought, with the system experiencing substantially increased levels of mouth closure compared to a similar study conducted in the 1980s. The timing of mouth opening and the degree of connectivity between the lakes influence the nursery function of the system as a whole. Management actions need to focus on improving ecological functioning of this system, in particular how mouth opening is managed, to facilitate nursery function and limit the establishment of invasive species. Conservation implications: Key management actions are required to improve fish recruitment potential into and within the system. These include maintenance of adequate marine inflow through adherence to artificial mouth breaching protocols and improving connectivity between the lakes through sediment removal from localised deposition points within the connecting channels.

  7. Historical and current fire management practices in two wilderness areas in the southwestern United States: The Saguaro Wilderness Area and the Gila-Aldo Leopold Wilderness Complex

    Science.gov (United States)

    Molly E. Hunter; Jose M. Iniguez; Calvin A. Farris

    2014-01-01

    Fire suppression has been the dominant fire management strategy in the West over the last century. However, managers of the Gila and Aldo Leopold Wilderness Complex in New Mexico and the Saguaro Wilderness Area in Arizona have allowed fire to play a more natural role for decades. This report summarizes the effects of these fire management practices on key resources,...

  8. Hikers and recreational stock users: Predicting and managing recreation conflicts in three wildernesses

    Science.gov (United States)

    Alan E. Watson; Michael J. Niccolucci; Daniel R. Williams

    1993-01-01

    A long-term problem that continues to grow in many wildland areas is the displeasure hikers express about meeting recreational livestock (primarily horses and mules) and seeing impacts from stock use. Three studies were conducted to provide a broad look at this interaction in wilderness and some of the contributors to the conflict between hikers and horse users....

  9. The Culture That Constrains: Experience of "Nature" as Part of a Wilderness Adventure Program.

    Science.gov (United States)

    Haluza-DeLay, Randolph

    1999-01-01

    A study examined experiences of nature among eight adolescents during a 12-day wilderness trip. The trip generated feelings of good will toward nature but no increase in environmentally responsible behaviors. Group norms emphasized social interaction and constrained attention to nature. Outdoor educators should consciously plan for transfer of…

  10. The global economic contribution of protected natural lands and wilderness through tourism

    Science.gov (United States)

    H. Ken Cordell; J. Michael Bowker

    2007-01-01

    These are the first-round results of a project aimed at exploring at a global scale the complex relationships between protected natural lands, tourism, and economic growth. In this fist round we mainly were interested in secondary sources of data and parameters from previously published studies. In presenting results for the 8th World Wilderness Congress, we provided...

  11. Monitoring recreational impacts in wilderness of Kamchatka (on example of Kronotsky State Natural Biosphere Preserve)

    Science.gov (United States)

    Anya V. Zavadskaya

    2011-01-01

    This paper describes an assessment and monitoring program that was designed and initiated for monitoring recreational impacts in a wilderness in Kamchatka. The framework of the recreational assessment was tested through its application to a case study conducted during the summers of 2008 and 2009 in the Kronotsky State Natural Biosphere Preserve (Kamchatka peninsula,...

  12. Active fans and grizzly bears: Reducing risks for wilderness campers

    Science.gov (United States)

    Sakals, M. E.; Wilford, D. J.; Wellwood, D. W.; MacDougall, S. A.

    2010-03-01

    Active geomorphic fans experience debris flows, debris floods and/or floods (hydrogeomorphic processes) that can be hazards to humans. Grizzly bears ( Ursus arctos) can also be a hazard to humans. This paper presents the results of a cross-disciplinary study that analyzed both hydrogeomorphic and grizzly bear hazards to wilderness campers on geomorphic fans along a popular hiking trail in Kluane National Park and Reserve in southwestern Yukon Territory, Canada. Based on the results, a method is proposed to reduce the risks to campers associated with camping on fans. The method includes both landscape and site scales and is based on easily understood and readily available information regarding weather, vegetation, stream bank conditions, and bear ecology and behaviour. Educating wilderness campers and providing a method of decision-making to reduce risk supports Parks Canada's public safety program; a program based on the principle of user self-sufficiency. Reducing grizzly bear-human conflicts complements the efforts of Parks Canada to ensure a healthy grizzly bear population.

  13. A study on alpha particles range in Cr-39

    International Nuclear Information System (INIS)

    Ibrahim, Z.A.; Talaat, T.M.; Abdel-Aziz, Kh.M.A.; El-Asser, M.R.

    2000-01-01

    Cr-39 plastic nuclear track detector has been used in range determination of alpha particles. A set of experiments was carried out for studying alpha energy and track diameter relationships. This work was done under the optimum conditions of Cr-39 etching in 6.25 N NaOH at 70 degree C for various etching times. Determination of alpha range in Cr-39 recorders was studied at different energy values using the over etched track profile technique. Data are discussed within the framework of track formation theory in plastic foils, comparison between experimental and theoretical values of alpha range is included

  14. SANDIA MOUNTAIN WILDERNESS, NEW MEXICO.

    Science.gov (United States)

    Hedlund, D.C.; Kness, R.F.

    1984-01-01

    Geologic and mineral-resource investigations in the Sandia Mountains in New Mexico indicate that a small part of the area has a probable mineral-resource potential. Most of the mineral occurrences are small barite-fluorite veins that occur along faults on the eastern slope of the range. The barite veins in the Landsend area and in the Tunnel Spring area are classed as having a probable mineral-resource potential. Fluorite veins which occur at the La Luz mine contain silver-bearing galeana and the area near this mine is regarded as having a probable resource potential for silver. No energy resources were identified in this study.

  15. Perspectives from the Aldo Leopold Wilderness Research Institute: Amphibians and wilderness

    Science.gov (United States)

    Corn, Paul Stephen

    2001-01-01

    The decline of amphibian species has emerged as a major global conservation issue in the last decade. Last year, the Department of the Interior (DOI) initiated a major national initiative to detect trends in amphibian populations and research the causes of declines. The program, conducted principally by the U.S. Geological Survey (USGS), emphasizes lands managed by DOI, but collaboration with the Forest Service is encouraged to increase the scope of inference about population trends. Although amphibians are not usually the first group of animals that comes to mind when one thinks of wilderness, conservation of amphibian populations is clearly a wilderness issue.

  16. Degeneracy and long-range correlation: A simulation study

    Directory of Open Access Journals (Sweden)

    Marmelat Vivien

    2011-12-01

    Full Text Available We present in this paper a simulation study that aimed at evidencing a causal relationship between degeneracy and long-range correlations. Long-range correlations represent a very specific form of fluctuations that have been evidenced in the outcomes time series produced by a number of natural systems. Long-range correlations are supposed to sign the complexity, adaptability and flexibility of the system. Degeneracy is defined as the ability of elements that are structurally different to perform the same function, and is presented as a key feature for explaining the robustness of complex systems. We propose a model able to generate long-range correlated series, and including a parameter that account for degeneracy. Results show that a decrease in degeneracy tends to reduce the strength of long-range correlation in the series produced by the model.

  17. Teaching wilderness first aid in a remote First Nations community: the story of the Sachigo Lake Wilderness Emergency Response Education Initiative

    OpenAIRE

    Karen Born; Aaron Orkin; David VanderBurgh; Jackson Beardy

    2012-01-01

    Objective. To understand how community members of a remote First Nations community respond to an emergency first aid education programme. Study design. A qualitative study involving focus groups and participant observation as part of a communitybased participatory research project, which involved the development and implementation of a wilderness first aid course in collaboration with the community. Methods. Twenty community members participated in the course and agreed to be part of the rese...

  18. Wilderness social science responding to change in society, policy, and the environment

    Science.gov (United States)

    Alan E. Watson; H. Ken Cordell

    2014-01-01

    Wilderness social science has changed over the 50 years since passage of the Wilderness Act. This research was initially heavily influenced by the need to operationalize definitions contained in the Wilderness Act, the desire to report use levels, and the need for better understanding of the important values American people attached to wilderness. Over the past three...

  19. Perceptions of stakeholders regarding wilderness and best management practices in an Alaska recreation area

    Science.gov (United States)

    Emily F. Pomeranz; Mark D. Needham; Linda E. Kruger

    2015-01-01

    This article focuses on the collaborative and voluntary Wilderness Best Management Practices (WBMP) for managing recreation in Tracy Arm-Fords Terror Wilderness in Alaska. Stakeholder definitions of wilderness, opinions about the WBMP, and whether these opinions are reflective of their perceptions of wilderness are examined. Interviews with tour operators, agency...

  20. Wilderness restoration: Bureau of Land Management and the Student Conservation Association in the California Desert District

    Science.gov (United States)

    J. Dan Abbe

    2007-01-01

    The California Desert Protection Act of 1994 was the largest park and wilderness legislation passed in the Lower 48 States since the Wilderness Act of 1964. It designated three national parks and 69 Bureau of Land Management wilderness areas. The California Desert and Wilderness Restoration Project is working to restore and revitalize these lands through a public/...

  1. Wilderness education: an updated review of the literature and new directions for research and practice

    Science.gov (United States)

    Kari Gunderson; Christopher V. Barns; William W. Hendricks; Leo H. McAvoy

    2000-01-01

    Many scientists, managers and advocates for wilderness consider education key to promoting appreciation and understanding of the cultural, environmental and experiential values of wilderness. Despite the large variety and diversity of wilderness information and education techniques, little research exists on the design and application of wilderness education programs...

  2. Observed Orbit Effects during Long Range Beam-Beam Studies

    CERN Document Server

    Alemany, R; Buffat, X; Calaga, R; Fitterer, M; Giachino, R; Hemelsoet, GH; Herr, W; Papotti, G; Pieloni, T; Poyer, M; Schaumann, M; Trad, G; Wollmann, D

    2012-01-01

    Possible limitations due to long range beam-beam effects at the LHC have been studied and are presented in this note. With a larger number of bunches and collisions in all interaction points, the crossing angles were reduced to enhance long range beam-beam effects. The analysis of the effects on the dynamic aperture and losses are documented in [1]. This note concentrates on the bunch-by-bunch orbit effects observed during the experiment.

  3. Wilderness recreation use estimation: a handbook of methods and systems

    Science.gov (United States)

    Alan E. Watson; David N. Cole; David L. Turner; Penny S. Reynolds

    2000-01-01

    Documented evidence shows that managers of units within the U.S. National Wilderness Preservation System are making decisions without reliable information on the amount, types, and distribution of recreation use occurring at these areas. There are clear legislative mandates and agency policies that direct managers to monitor trends in use and conditions in wilderness....

  4. Research on the relationship between humans and wilderness in Alaska

    Science.gov (United States)

    Alan E. Watson

    2005-01-01

    At the 2005 Biennial George Wright Society Conference on Parks, Protected Areas, and Cultural Sites in Philadelphia, March 14 to 18, there were many sessions relevant to wilderness. One session provided focus on a priority research area of the Leopold Institute: understanding the effects of management actions on relationships between people and wilderness. A great...

  5. Results From the 2014 National Wilderness Manager Survey

    Science.gov (United States)

    Ramesh Ghimire; Ken Cordell; Alan Watson; Chad Dawson; Gary T. Green

    2015-01-01

    A national survey of managers was developed to support interagency wilderness strategic planning. The focus was on major challenges, perceived needs for science and training, and accomplishments of 1995 Strategic Plan objectives. The survey was administered to managers at the four federal agencies with wilderness management responsibilities: the Bureau of Land...

  6. Managing Human Activities in Antarctica : Should Wilderness Protection Count?

    NARCIS (Netherlands)

    Bastmeijer, C.J.

    2005-01-01

    Antarctica is often described as one of the world's last wildernesses. In harmony with this general perception, the wilderness values of Antarctica received legal status with the adoption of the Protocol on Environmental Protection to the Antarctic Treaty. Article 3(1) of the Protocol obliges each

  7. Wilderness educators' evaluation of the Impact Monster Program

    Science.gov (United States)

    William W. Hendricks; Alan E. Watson

    1999-01-01

    Since its development by Jim Bradley in the late 1970s, the Impact Monster, a wilderness education skit designed to teach minimum impact techniques, has been used as a wilderness education tool by federal land management agencies. This paper reports on an evaluation of the perceived effectiveness of the Impact Monster program and its content. Results indicate that the...

  8. Personal wilderness relationships: Building on a transactional approach

    Science.gov (United States)

    Robert G. Dvorak; William T. Borrie; Alan E. Watson

    2013-01-01

    Wilderness managers are charged with the challenging goal of balancing resource protection and experience quality across a broad, value-laden landscape. While research has provided insight into visitors' motivations and their meanings for wilderness, a struggle exists to implement experiential concepts within current management frameworks. This research posits the...

  9. A survey of exotic plants in federal wilderness areas

    Science.gov (United States)

    Marilyn Marler

    2000-01-01

    I conducted a survey of wilderness areas to provide an overview of plant invasions in the National Wilderness Preservation System. Fifteen per cent of responding mangers reported that exotic plants were among their top 10 management concerns, either because they are actively dealing with control of exotic pest plants or have prioritized prevention of their...

  10. Heat-related illness in the African wilderness | Hofmeyr | South ...

    African Journals Online (AJOL)

    ... and culminate in life-threatening heat stroke. The differential diagnosis in the wilderness is broad and should include exercise-associated hyponatraemia with or without encephalopathy. Clinical guidelines for wilderness and hospital management of these conditions are available. Field management and evacuation are ...

  11. Living waters: Linking cultural knowledge, ecosystem services, and wilderness

    Science.gov (United States)

    Linda Moon Stumpff

    2013-01-01

    American Indian tribes value pristine water sources that often originate in wilderness areas to support provisioning and cultural benefits. Based on interviews with four traditional leaders, this article focuses on the concept of living waters in ways that connect ecosystem service benefits to wilderness. Cultural knowledge connects indigenous water stewardship and...

  12. Geochemical survey maps of the wildernesses and roadless areas in the White Mountains National Forest, Coos, Grafton, and Carroll counties, New Hampshire

    Science.gov (United States)

    Canney, F.C.; Howd, F.H.; Domenico, J.A.; Nakagawa, H.M.

    1987-01-01

    The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine what mineral values, if any, may be present. Results must be made available to the public and be submitted to the President and the Congress. This report presents the results a geochemical survey of the Great Gulf and Presidential Range-Dry River Wilderness Areas; the Dartmouth Range, Wild River, Pemigewasset, Kinsman Mountain, Mount Wolf-Gordon Pond, Jobildunk, Carr Mountain, Sandwich Range, and the Dry River Extention (2 parcels) Roadless Areas; and the intervening and immediately surrounding areas in the White Mountain National Forest, Coos, Grafton, and Carroll Counties, New Hampshire. The Great Gulf Wilderness was established when the Wilderness Act was passed in 1964, and the Presidential Range-Dray Wiver Wilderness was established by Public Law 93-622, January 3, 1975. The Dartmouth Range, Wild River, Pemigewasset, Kinsman Mountain, Mount Wolf-Gordon Pond, Carr Mountain, and Jobildunk areas were classified as a further planning area during the Second Roadless Area Review and Evaluation (RARE II) by the U.S. Forest Service, January 1979.

  13. Netherlands Army Long Range Anti Armour Study - Status Report

    OpenAIRE

    Schagen, P.A.B. van

    1989-01-01

    At the end of the nineties the munition for the TOW weapon system in use at The Netherlands army, has to be replaced. The Life of Type of The Tow carrier ends in 2005. The long range anti armour study is to gain insight into the possibilities and limitations for the Netherlands army to deploy future (time period 1995-2000) weapon systems in the long range anti armour battle. The first study results are expected at the end of 1989. The study is sponsored by the Netherlands army and is carried ...

  14. Donations as an alternative to wilderness user fees: the case of the desolation wilderness

    Science.gov (United States)

    Steven R. Martin

    2000-01-01

    Day-use visitors to the Desolation Wilderness were asked about making voluntary donations at the trailhead. Of the 111 visitors who used one of the four trailheads at which voluntary donations were requested, 55% reported making a donation, with an average reported donation amount of $4.20. Subjects were categorized into three groups: donors, would-be donors, and...

  15. A Journey into AlaskaWhen I went to Alaska to study humans in nature, I wrote a story to summarize my research. It follows Caleb as he goes through Alaskan wilderness. He contrasts the peaceful ways of the Tlingit. His materialistic motives clash with others. The story ends with him dying in the wild. Caleb symbolizes unrightfully using natural resources.

    Science.gov (United States)

    Hosseini, A.

    2017-12-01

    When I went to Alaska to study humanity's place in nature, I crafted a short piece of writing as a way to summarize what I learned. The story follows the path of Caleb as he goes through the Alaskan wilderness. His actions contrast heavily with the peaceful ways of Alaska's natives, the Tlingit, and his selfish, materialistic motives clash with those of others he meets. The story ends with him dying alone, succumbing to Mother Nature's defeat. Caleb represents those who utilize natural resources at their own gain, and his journey shows the same trap many others have fallen into.

  16. Coastal bathymetry data collected in May 2015 from Fire Island, New York—Wilderness breach and shoreface

    Science.gov (United States)

    Nelson, Timothy R.; Miselis, Jennifer L.; Hapke, Cheryl J.; Brenner, Owen T.; Henderson, Rachel E.; Reynolds, Billy J.; Wilson, Kathleen E.

    2017-05-12

    Scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida, conducted a bathymetric survey of Fire Island from May 6-20, 2015. The USGS is involved in a post-Hurricane Sandy effort to map and monitor the morphologic evolution of the wilderness breach as a part of the Hurricane Sandy Supplemental Project GS2-2B. During this study, bathymetry data were collected with single-beam echo sounders and Global Positioning Systems, which were mounted to personal watercraft, along the Fire Island shoreface and within the wilderness breach. Additional bathymetry and elevation data were collected using backpack Global Positioning Systems on flood shoals and in shallow channels within the wilderness breach.

  17. Netherlands Army Long Range Anti Armour Study - Status Report

    NARCIS (Netherlands)

    Schagen, P.A.B. van

    1989-01-01

    At the end of the nineties the munition for the TOW weapon system in use at The Netherlands army, has to be replaced. The Life of Type of The Tow carrier ends in 2005. The long range anti armour study is to gain insight into the possibilities and limitations for the Netherlands army to deploy future

  18. Front Range Forest Health Partnership Phase 1 feasibility study

    Energy Technology Data Exchange (ETDEWEB)

    Volkin, P

    1998-09-01

    The Front Range Forest Health Partnership is an alliance of individuals, citizen groups, federal, state, private, and nonprofit organizations that formed to promote forest health restoration and reduce fire risks on Colorado's Front Range. The partnership promotes selective thinning to restore forest health and supports economically feasible end uses for wood waste materials. The Phase I study was initiated to determine the environmental and economic feasibility of using wood wastes from forested and urban areas for the production of fuel-grade ethanol.

  19. Study of beam-beam long range compensation with octupoles

    CERN Document Server

    AUTHOR|(CDS)2068329; Pieloni, Tatiana; Buffat, Xavier; Tambasco, Claudia

    2017-01-01

    Long range beam-beam effects are responsible for particle losses and define fundamental operational parameters of colliders (i.e. crossing angles, intensities, emittances, ${\\beta}$${^∗}$). In this study we propose octuple magnets as a possible scheme to efficiently compensate long-range beam-beam interactions with a global correction scheme. The impact and improvements on the dynamic aperture of colliding beams together with estimates of the luminosity potentials are dis- cussed for the HL-LHC upgrade and extrapolations made for the FCC project.

  20. One-dimensional long-range percolation: A numerical study

    Science.gov (United States)

    Gori, G.; Michelangeli, M.; Defenu, N.; Trombettoni, A.

    2017-07-01

    In this paper we study bond percolation on a one-dimensional chain with power-law bond probability C /rd +σ , where r is the distance length between distinct sites and d =1 . We introduce and test an order-N Monte Carlo algorithm and we determine as a function of σ the critical value Cc at which percolation occurs. The critical exponents in the range 0 values for Cc are compared with a known exact bound, while the critical exponent ν is compared with results from mean-field theory, from an expansion around the point σ =1 and from the ɛ -expansion used with the introduction of a suitably defined effective dimension deff relating the long-range model with a short-range one in dimension deff. We finally present a formulation of our algorithm for bond percolation on general graphs, with order N efficiency on a large class of graphs including short-range percolation and translationally invariant long-range models in any spatial dimension d with σ >0 .

  1. Dimensions of flow during an experiential wilderness science program

    Science.gov (United States)

    Wang, Robert

    Over the past twenty-five years, there has been an alarming decline in academic performance among American students. This trend is seen in failing test scores, poor attendance, and low first-year retention rates at post-secondary institutions. There have been numerous studies that have examined this issue but few to offer solutions. Mihalyi Csikszentmihalyi, the originator of flow theory, suggests that poor academic performance might be best explained in terms of lack of student motivation and engagement (flow) rather than a lack of cognitive abilities. This study was designed to examine a series of activities conducted during an Experiential Wilderness Science Program at a college located in the Rocky Mountain region. Specifically, this study measured student engagement for each activity and described the dimensions (phenomenological, instructional, etc.) that were present when there was a high frequency of engagement among program participants. A combined quantitative and qualitative research methodology was utilized. The Experience Sampling Form (ESF) was administered to 41 freshman students participating in a 3-day wilderness science program to measure the frequency of engagement (flow) for nine different activities. A qualitative investigation using journals, participant interviews, and focus groups was used to describe the dimensions that were present when a high frequency of engagement among program participants was observed. Results revealed that engagement (flow) was highest during two challenge education activities and during a river sampling activity. Dimensions common among these activities included: an environment dimension, a motivation dimension, and an instruction dimension. The environment dimension included: incorporating novel learning activities, creating student interests, and introducing an element of perceived risk. The motivation dimension included: developing internal loci of control, facilitating high levels of self-efficacy, and

  2. Conservation planning for biodiversity and wilderness: a real-world example.

    Science.gov (United States)

    Ceauşu, Silvia; Gomes, Inês; Pereira, Henrique Miguel

    2015-05-01

    Several of the most important conservation prioritization approaches select markedly different areas at global and regional scales. They are designed to maximize a certain biodiversity dimension such as coverage of species in the case of hotspots and complementarity, or composite properties of ecosystems in the case of wilderness. Most comparisons between approaches have ignored the multidimensionality of biodiversity. We analyze here the results of two species-based methodologies-hotspots and complementarity-and an ecosystem-based methodology-wilderness-at local scale. As zoning of protected areas can increase the effectiveness of conservation, we use the data employed for the management plan of the Peneda-Gerês National Park in Portugal. We compare the approaches against four criteria: species representativeness, wilderness coverage, coverage of important areas for megafauna, and for regulating ecosystem services. Our results suggest that species- and ecosystem-based approaches select significantly different areas at local scale. Our results also show that no approach covers well all biodiversity dimensions. Species-based approaches cover species distribution better, while the ecosystem-based approach favors wilderness, areas important for megafauna, and for ecosystem services. Management actions addressing different dimensions of biodiversity have a potential for contradictory effects, social conflict, and ecosystem services trade-offs, especially in the context of current European biodiversity policies. However, biodiversity is multidimensional, and management and zoning at local level should reflect this aspect. The consideration of both species- and ecosystem-based approaches at local scale is necessary to achieve a wider range of conservation goals.

  3. Medical student electives in wilderness medicine: curriculum guidelines.

    Science.gov (United States)

    Lareau, Stephanie A; Caudell, Michael J; Pandit, Kiran B; Hiestand, Brian C

    2014-12-01

    Wilderness medicine has been a part of medical student education for many years and is becoming more popular. To help standardize and improve the student experience, we surveyed current elective directors to gain an understanding of what experts in the field thought were priority elements in a wilderness medicine elective. Although there is a diversity of opinion among leaders in the field, there are multiple topics on which there is concordance on inclusion or exclusion. Copyright © 2014 Wilderness Medical Society. Published by Elsevier Inc. All rights reserved.

  4. Science and stewardship to protect and sustain wilderness values: Tenth World Wilderness Congress symposium; 2013, 4-10 October, Salamanca, Spain

    Science.gov (United States)

    Alan Watson; Stephen Carver; Zdenka Krenova; Brooke McBride

    2015-01-01

    The Tenth World Wilderness Congress (WILD10) met in Salamanca, Spain in 2013. The symposium on science and stewardship to protect and sustain wilderness values was the largest of multiple symposia held in conjunction with the Congress. This symposium was organized and sponsored by the Aldo Leopold Wilderness Research Institute, the Wildland Research Institute of the...

  5. Fish abundance in the Wilderness and Swartvlei lake systems ...

    African Journals Online (AJOL)

    1995-11-06

    Nov 6, 1995 ... having a detrimental impact on fish communities, and propo- sals have been ... salinity gradient exists in the Wilderness system, with ...... Osmoregulation in juvenile Rhabdosargus .... Community metabolism and phosphorous.

  6. Lyndon Baines Johnson signs the Wilderness Act into law

    Science.gov (United States)

    Susan A. Fox

    2016-01-01

    President Lyndon Baines Johnson signed the Wilderness Act into law on Sept. 3, 1964. In this photo, LBJ hands the pen he used to Alice Zahniser while naturalist, author, adventurer, and conservationist Mardy Murie (standing behind her) looks on.

  7. Pad A treatability study long-range project plan

    International Nuclear Information System (INIS)

    Mousseau, J.D.

    1991-06-01

    This plan addresses the work to be accomplished by the Pad A Treatability Study Project. The purpose of this project is to investigate potential treatment and separation technologies, identify the best technologies, and to demonstrate by both lab- and pilot-scale demonstration, the most applicable remedial technologies for treating plutonium-contaminated salts at the Pad A site located at the Subsurface Disposal Area (SDA) at the Radioactive Waste Management Complex (RWMC) a the Idaho National Engineering Laboratory (INEL). The conduct of this project will be supported by other DOE laboratories, universities, and private industries, who will provide support for near-term demonstrations of treatment and separation technologies. The purpose of this long-range planning document is to present the detailed plan for the implementation of the Pad A Treatability Study Project

  8. Why is it important to monitor social conditions in wilderness?

    Science.gov (United States)

    Alan E. Watson

    1990-01-01

    “Social conditions in wilderness” refers to all aspects of human use of the wilderness that pose the possibility of impact to the resource and visitor experiences. The reasons for monitoring (1) use levels and use trends (including characteristics of use and users) and (2) the quality of the recreation experiences provided (ability to provide naturalness, privacy, and...

  9. The Role of Transport Use in Adolescent Wilderness Treatment: Its Relationship to Readiness to Change and Outcomes

    Science.gov (United States)

    Tucker, Anita R.; Bettmann, Joanna E.; Norton, Christine L.; Comart, Casey

    2015-01-01

    Background: Considering the sensitive ethical issues related to involuntary treatment of adolescents, research investigating youth transport practices and treatment outcomes is clearly needed. Youth transport is common practice in many private pay programs, including wilderness therapy programs. Objective: This study of 350 adolescents in…

  10. Wilderness Preparticipation Evaluation and Considerations for Special Populations.

    Science.gov (United States)

    Joy, Elizabeth; Van Baak, Karin; Dec, Katherine L; Semakula, Barbara; Cardin, Ashlea D; Lemery, Jay; Wortley, George C; Yaron, Michael; Madden, Christopher

    2015-12-01

    Children, older adults, disabled and special needs athletes, and female athletes who participate in outdoor and wilderness sports and activities each face unique risks. For children and adolescents traveling to high altitude, the preparticipation physical evaluation should focus on risk assessment, prevention strategies, early recognition of altitude-related symptoms, management plans, and appropriate follow-up. As the risk and prevalence of chronic disease increases with age, both older patients and providers need to be aware of disease and medication-specific risks relative to wilderness sport and activity participation. Disabled and special needs athletes benefit from careful pre-event planning for the potential medical issues and equipment modifications that may affect their health in wilderness environments. Issues that demand special consideration for female adventurers include pregnancy, contraceptive use, menses, and ferritin levels at altitude. A careful preparticipation evaluation that factors in unique, population- specific risks will help special populations stay healthy and safe on wilderness adventures. The PubMed and SportDiscus databases were searched in 2014 using both MeSH terms and text words and include peer-reviewed English language articles from 1977 to 2014. Additional information was accessed from Web-based sources to produce this narrative review on preparticipation evaluation for special populations undertaking wilderness adventures. Key words include children, adolescent, pediatric, seniors, elderly, disabled, special needs, female, athlete, preparticipiation examination, wilderness medicine, and sports. Copyright © 2015. Published by Elsevier Inc.

  11. The narrow range of perceived predation: a 19 group study

    Directory of Open Access Journals (Sweden)

    Olivier Mesly

    2013-05-01

    Full Text Available This paper rests largely on the works of Mesly (1999 to 2012. It argues that the phenomenon of perceived predation as a functional behavioural phenomenon is subjected to certain limits, a finding based on studies performed on 19 different groups spread over a four-year span. It also finds a constant of k = 1.3 which reflects the invariant nature of perceived predation. These findings add to the theory of financial predation which stipulates that financial predators operate below the limits of detection pertaining to their customers (and market regulators. They are experts at minimizing the perception that clients could have that they are after their money, causing them financial harm, by surprise (perceived predation. Understanding the narrow range in which financial predators operate is setting the grounds to offer better protection to investors and to implementing better control and punitive measures.

  12. Studying of tritium content in snowpack of Degelen mountain range.

    Science.gov (United States)

    Turchenko, D V; Lukashenko, S N; Aidarkhanov, A O; Lyakhova, O N

    2014-06-01

    The paper presents the results of investigation of tritium content in the layers of snow located in the streambeds of the "Degelen" massif contaminated with tritium. The objects of investigation were selected watercourses Karabulak, Uzynbulak, Aktybai located beyond the "Degelen" site. We studied the spatial distribution of tritium relative to the streambed of watercourses and defined the borders of the snow cover contamination. In the centre of the creek watercourses the snow contamination in the surface layer is as high as 40 000 Bq/L. The values of the background levels of tritium in areas not related to the streambed, which range from 40 to 50 Bq/L. The results of snow cover measurements in different seasonal periods were compared. The main mechanisms causing tritium transfer in snow were examined and identified. The most important mechanism of tritium transfer in the streams is tritium emanation from ice or soil surface. Copyright © 2014 Elsevier Ltd. All rights reserved.

  13. 78 FR 21906 - Six Rivers National Forest, California, Trinity Summit Range Assessment Environmental Impact...

    Science.gov (United States)

    2013-04-12

    ..., wilderness characteristics, water quality, soil productivity, and quality fish and wildlife habitat... DEPARTMENT OF AGRICULTURE Forest Service Six Rivers National Forest, California, Trinity Summit Range Assessment Environmental Impact Statement AGENCY: Forest Service, USDA. ACTION: Notice of Intent...

  14. Social construction of arctic wilderness: place meanings, value pluralism, and globalization

    Science.gov (United States)

    Daniel R. Williams

    2002-01-01

    This paper offers a social constructionist approach to examining the nature and dynamics of arctic wilderness meanings and values. Viewing wilderness as a socially constructed place responds to growing critiques of modern "Enlightenment" views of nature and society in three ways examined here. First, wilderness landscapes are seen as geographically organized...

  15. 76 FR 78309 - Hawaiian and Pacific Islands National Wildlife Refuge Complex; Wilderness Review and Legislative...

    Science.gov (United States)

    2011-12-16

    ... wilderness, and accomplish refuge purposes in a way that preserves wilderness character. Our policies on... Forest, Palmyra Atoll, Pearl Harbor, Rose Atoll, and Wake Atoll. These refuges are located in Hawai'i... preserves wilderness character in accordance with (1) the Refuges' respective CCPs; (2) regulations on...

  16. Southern by the grace of God: wilderness framing in the heart of Dixie

    Science.gov (United States)

    Bryan K. Walton

    2000-01-01

    Wilderness advocacy in Alabama is as unique as the cultural flavor of the South. This paper documents how the most recent wave of wilderness activism in Alabama, embodied in the Alabama Wilderness Alliance, Wild Alabama, and WildLaw, have sought to place themselves within the cultural roots and heritage of the American South. In this paper, the efforts and impacts of...

  17. Boundary Waters Canoe Area Wilderness - A long history of management guided by science

    Science.gov (United States)

    David Cole

    2016-01-01

    The Boundary Waters Canoe Area Wilderness (BWCAW) in northern Minnesota is one of the most iconic and cherished wilderness areas in the United States. One of the original wilderness areas established in 1964, the BWCAW protects a glaciated landscape of about 1,175 lakes, connected by several hundred miles of streams. Located adjacent to Canada's Quetico Provincial...

  18. Wilderness stewardship in America today and what we can do to improve it

    Science.gov (United States)

    Ken Cordell; Chris Barns; David Brownlie; Tom Carlson; Chad Dawson; William Koch; Garry Oye; Chris Ryan

    2016-01-01

    The authors of this article are recently retired wilderness professionals from universities or federal agencies. We were asked to share our observations about how wilderness stewardship is being managed in America today. We based our observations on our many years of combined professional wilderness career experience as managers, trainers, scientists, educators, and...

  19. Interacting effects of wildfire severity and liming on nutrient cycling in a southern Appalachian wilderness area

    Science.gov (United States)

    Katherine Elliott; Jennifer D. Knoepp; James M. Vose; William A. Jackson

    2013-01-01

    Aims Wilderness and other natural areas are threatened by large-scale disturbances (e.g., wildfire), air pollution, climate change, exotic diseases or pests, and a combination of these stress factors (i.e., stress complexes). Linville Gorge Wilderness (LGW) is one example of a high elevation wilderness in the southern Appalachian region that has been subject to stress...

  20. Wilderness stewardship challenges in the uKhahlamba Drakensberg Park World Heritage Site

    Science.gov (United States)

    Sonja Krüger

    2007-01-01

    The location of the uKhahlamba Drakensberg Park wilderness areas along an international border and within a World Heritage Site and Transfrontier Conservation Area, provides unique opportunities and challenges for the stewardship of these areas. Although the wilderness areas were proclaimed more than 30 years ago, wilderness-specific planning, management and monitoring...

  1. Wilderness restoration: From philosophical questions about naturalness to tests of practical techniques

    Science.gov (United States)

    David N. Cole

    2008-01-01

    When crafting the U.S. Wilderness Act, Howard Zahniser selected the word untrammeled rather than undisturbed to describe wilderness (Harvey 2005). This reflected his belief that places that had been disturbed by humans should be considered for wilderness designation because impaired ecosystems could be restored. Like many others, he hoped that restoration could be...

  2. A Study of Adaptive Detection of Range-Distributed Targets

    National Research Council Canada - National Science Library

    Gerlach, Karl R

    2000-01-01

    .... The unknown parameters associated with the hypothesis test are the complex amplitudes in range of the desired target and the unknown covariance matrix of the additive interference, which is assumed...

  3. A Study of Adaptive Detection of Range-Distributed Targets

    National Research Council Canada - National Science Library

    Gerlach, Karl R

    2000-01-01

    ... to be characterized as complex zero-mean correlated Gaussian random variables. The target's or targets' complex amplitudes are assumed to be distributed across the entire input data block (sensor x range...

  4. Long-range eye tracking: A feasibility study

    Energy Technology Data Exchange (ETDEWEB)

    Jayaweera, S.K.; Lu, Shin-yee

    1994-08-24

    The design considerations for a long-range Purkinje effects based video tracking system using current technology is presented. Past work, current experiments, and future directions are thoroughly discussed, with an emphasis on digital signal processing techniques and obstacles. It has been determined that while a robust, efficient, long-range, and non-invasive eye tracking system will be difficult to develop, such as a project is indeed feasible.

  5. Study of pseudo noise CW diode laser for ranging applications

    Science.gov (United States)

    Lee, Hyo S.; Ramaswami, Ravi

    1992-01-01

    A new Pseudo Random Noise (PN) modulated CW diode laser radar system is being developed for real time ranging of targets at both close and large distances (greater than 10 KM) to satisy a wide range of applications: from robotics to future space applications. Results from computer modeling and statistical analysis, along with some preliminary data obtained from a prototype system, are presented. The received signal is averaged for a short time to recover the target response function. It is found that even with uncooperative targets, based on the design parameters used (200-mW laser and 20-cm receiver), accurate ranging is possible up to about 15 KM, beyond which signal to noise ratio (SNR) becomes too small for real time analog detection.

  6. Demonstrator study for micro-ranging-laser device

    Science.gov (United States)

    Henkel, Hartmut; Bernhardt, Bodo; Pereira do Carmo, J.

    2017-11-01

    Within ESA's Innovation Triangle Initiative (ITI) a demonstrator breadboard for a micro-ranging-laser device "MYLRAD" has been developed. Its working principle is the measurement of the round-trip delay time of a laser beam as a phase shift. The demonstrator consists of the laser diode (30 mW, square wave AM), optics, APD detector, narrowband preamplifier, limiter, and a phase digitiser based on a novel noise-shaping synchroniser (NSS) circuit; this works without ADCs and can be built from rad-hard components for space. The system timing and the digitiser algorithm are performed by an FPGA. The demonstrator has been tested at ranges from 1 m to 30 m. With a static non-cooperative target an RMS noise of 1 mm at a result rate of 60 Hz was reached. The demonstrator needs less than 2.5 W power.

  7. Virginia Tech Wildlife Student Studies Cheetah Home Ranges

    OpenAIRE

    Davis, Lynn

    2003-01-01

    The cheetah may be the world's fastest land animal, accelerating to high speeds in just a few steps, but within recent years the cheetahs of South Africa are battling the race for survival. To find remedies for this problem Peter Laver, a graduate student in fisheries and wildlife sciences in the College of Natural Resources at Virginia Tech, is expanding current research on home ranges of the cheetah population located in the Serengeti National Park in Tanzania, Africa.

  8. Wilderness science in a time of change conference-Volume 1: Changing perspectives and future directions; 1999 May 23-27; Missoula, MT

    Science.gov (United States)

    David N. Cole; Stephen F. McCool; Wayne A. Freimund; Jennifer O' Loughlin

    2000-01-01

    Ten papers presented as plenary talks at the conference, "Wilderness Science in a Time of Change," are included. Topics include: the influence of global change on wilderness and its management; contemporary criticisms and celebrations of the wilderness idea; the capacity of science to meet the challenges and opportunities wilderness presents; wilderness in...

  9. Wilderness leadership--on the job.

    Science.gov (United States)

    Kanengieter, John; Rajagopal-Durbin, Aparna

    2012-04-01

    Lessons taught and learned in the challenging, unpredictable environment of a wilderness expedition have direct applications to today's business world. That's according to two directors at the National Outdoor Leadership School, who in this article share five principles for expedition--and career-success. (1) Practice leadership. The fundamental philosophy of NOLS is that leadership can be learned-even by those who don't think they have a natural ability to lead. You just need to practice making decisions, then reflecting on and learning from the outcomes. (2) Lead from everywhere. In an expedition group, or in an organization, you can play four roles, often simultaneously: designated leader, active follower, peer leader, and self-leader. Effective teamwork rests on knowing how and when to step into each role. (3) Behave well Leadership means getting along in a diverse group, cooperating with teammates, effectively resolving conflict, and keeping yourself and others motivated. (4) Keep calm. On expeditions and in business, people often end up scrapping not only Plan A but also Plan B. Leadership involves planning for things you can control, letting go of things you can't, expecting the unexpected, and maintaining composure when unforeseen circumstances arise. (5) Disconnect to connect. The fast-paced, high-tech world of work wreaks havoc on leaders' ability to engage in the careful, strategic thinking required of them. It's important to disconnect from 21st-century distractions and to connect with nature once in a while.

  10. Long-Range Self-Study, 1975-1985.

    Science.gov (United States)

    Williamsport Area Community Coll., PA.

    This self-study contains recommendations and objectives for Williamsport Area Community College (WACC), a one-campus, vocational-technical oriented college in an industrial community in Pennsylvania. The methodology employed in producing this self-study is intended to form the framework for a continuous learning-oriented short and long-range…

  11. Pad A Treatability Study long-range project plan

    International Nuclear Information System (INIS)

    Mousseau, J.D.

    1991-08-01

    The purpose of the Pad A Treatability Study Project is to identify and demonstrate through lab- and pilot-scale testing, technologies for treating plutonium-contaminated salt waste. This document presents proposed objectives and schedules, scope of work and breakdown structure, cost elements, deployment, benefits, and change controls for the project

  12. Sibutramine in weight control: a dose-ranging, efficacy study.

    Science.gov (United States)

    Weintraub, M; Rubio, A; Golik, A; Byrne, L; Scheinbaum, M L

    1991-09-01

    We tested the safety and efficacy of sibutramine, 5 and 20 mg, and placebo on weight loss. Medication was added to caloric restriction, behavior modification, and exercise in a parallel-group, double-blind clinical trial. Participants were 130% to 180% of ideal body weight and in good health. The study lasted 12 weeks over Thanksgiving, Christmas, and New Year's Day. Weight loss during 8 weeks of study medication was: placebo, 1.4 +/- 2.1 kg (n = 19); 5 mg sibutramine, 2.9 +/- 2.3 kg (n = 18); and 20 mg sibutramine, 5.0 +/- 2.7 kg (n = 18) (p less than 0.05 sibutramine, 5 and 20 mg, versus placebo; p less than 0.05 sibutramine, 20 mg versus 5 mg). There is a significant dose-effect relationship. Five participants left the study before completion, all because of adverse events; placebo (one patient), 5 mg sibutramine (one patient), and 20 mg sibutramine (three patients). Sleep difficulties were noted by eight participants (20 mg sibutramine, seven patients; 5 mg, one patient; and placebo, no patients). Six of 21 participants receiving 20 mg complained of irritability, unusual impatience, or "excitation." Sibutramine, 5 and 20 mg, added to a multimodal program assisted participants in losing weight.

  13. A study of lifetime within the -12 sec range

    International Nuclear Information System (INIS)

    Dorobantu, V.

    1977-01-01

    Lifetimes of excited nuclear states are studied with a particular emphasis on the determination of nuclear lifetimes by means of the Doppler shift decomposition attenuation method - DSAM - which is based on the mathematical theory of stochastic processes; by its own nature, the emission of recoil nuclei, their motion through an amorphous medium and the detection of gamma rays resulting from these nuclei are all stochastic processes as well. Measurements of lifetimes together with other measurements can supply nuclear structure data, as well as information on the slowing-down process of an energetic ion through a certain material. The experimental tests have been carried out on the Tandem accelerator - IFIN, Bucharest. (author)

  14. 36 CFR 261.57 - National Forest wilderness.

    Science.gov (United States)

    2010-07-01

    ...-burnable food or beverage containers, including deposit bottles, except for non-burnable containers... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false National Forest wilderness. 261.57 Section 261.57 Parks, Forests, and Public Property FOREST SERVICE, DEPARTMENT OF AGRICULTURE...

  15. Then the Wilderness Shall Bloom like a Rosy Bower

    DEFF Research Database (Denmark)

    Nielsen, Kirsten

    2014-01-01

    intertextual connections to the rest of the book. In my article, I have analysed how the Danish poet N.F.S. Grundtvig reworks Isa 35 in his hymn “Then the wilderness shall bloom like a rosy bower”, and how he reinterprets the wild animals as the Enemy (the Devil). In my view, the animals in Isa 35 have...

  16. Comparing manager and visitor perceptions of llama use in wilderness

    Science.gov (United States)

    Alan E. Watson; Neal A. Christensen; Dale J. Blahna; Kari S. Archibald

    1998-01-01

    Llama use in wilderness is projected to increase over the next 5 years. While the greatest concerns about this increase in use are unexpected impacts to native flora, impacts to native fauna, and conflicts with other user types, there is also concern about how prepared managers are to deal with this increasing recreation demand. This research compares manager attitudes...

  17. Wilderness Management... A Computerized System for Summarizing Permit Information

    Science.gov (United States)

    Gary H. Elsner

    1972-01-01

    Permits were first needed for visits to wilderness areas in California during summer 1971. A computerized system for analyzing these permits and summarizing information from them has been developed. It produces four types of summary tables: point-of-origin of visitors; daily variation in total number of persons present; variations in group size; and variations in...

  18. The human context and natural character of wilderness lands

    Science.gov (United States)

    H. Ken Cordell; Danielle Murphy; Kurt H. Riitters; J.E. Harvard

    2005-01-01

    This chapter describes the lands that make up the National Wilderness Preservation System (NWPS). The first section includes statistics on trends in designations since the creation of the NWPS and describes the current size of the System in total land area and number of areas across the country. Also included are descriptions of the prevalence of NWPS lands by states...

  19. The Wilders Case in the Netherlands and Beyond

    NARCIS (Netherlands)

    J.D. Temperman (Jeroen)

    2017-01-01

    textabstractDutch Politician Geert Wilders, leader of the rightist Party for Freedom (PVV), was tried in relation to (religious) defamation and hate speech charges in a case that lasted from 2009 to 2011. While fully acquitted, stakeholders are now bringing a case against the Netherlands for

  20. An ecosystem approach to management: a context for wilderness protection

    Science.gov (United States)

    Paul A. Gray; Robert J. Davidson

    2000-01-01

    Sustainable development, ecosystem management and ecosystem health are three prominent catch phrases that now permeate the scientific and popular media, and form the basis of a growing number of private sector, government and academic programs. This discussion paper briefly explores the definition and application of these concepts as a context for wilderness protection...

  1. Visitor preferences for managing wilderness recreation after wildfire.

    Science.gov (United States)

    Ryan N.K. Brown; Randall S. Rosenberger; Jeffrey D. Kline; Troy E. Hall; Mark D. Needham

    2008-01-01

    The 2003 Bear Butte and Booth (B&B) Fires burned much of the Mount Jefferson Wilderness in the Deschutes and Willamette National Forests, Oregon. A question for managers is how best to manage recreation in fire-affected areas in ways that minimize adverse impacts on visitor experiences and the recovering landscape. To help address this question, we used onsite...

  2. The socio-cultural value of New Zealand wilderness

    Science.gov (United States)

    Kerry Wray

    2011-01-01

    New Zealand's wilderness resource has become iconic on both a national and international scale, and provides an important source of cultural identity for many Kiwis (a colloquial term for a New Zealander). Now, in the early 21st Century, however, social changes such as urbanization, globalization, increasing consumerism, and growing international tourism may be...

  3. Fish abundance in the Wilderness and Swartvlei lake systems ...

    African Journals Online (AJOL)

    A longer duration tidal phase in the Swartvlei system during 1992 and 1993, compared to the Wilderness lake system, did not result in greater abundance of fish sampled. There appears to be no justification for the artificial maintenance of permanently tidal conditions in the Swartvlei and Touw River estuaries on the ...

  4. Between wilderness and the middle landscape: A rocky road

    Science.gov (United States)

    Lisi Krall

    2007-01-01

    Wilderness preservation, as one branch of conservation, demonstrates a decidedly different cultural ethos than the utilitarian branch. Thus, preservation and utilitarian conservation represent different habits of thought fermenting in the cask of l9th century economic evolution. More specifically, the utilitarian branch of conservation can easily be viewed as an...

  5. A Comparative Analysis for Wilderness User Fee Policy.

    Science.gov (United States)

    Leuschner, William A.; And Others

    1987-01-01

    Two similar wilderness areas, one of which charges user fees, were sampled in order to compare user characteristics, trip characteristics, and travel cost demand functions. The purpose was to examine the effect fees had on user behavior and choices of area. Results are presented. (MT)

  6. Nature-based outdoor recreation trends and wilderness

    Science.gov (United States)

    H. Ken Cordell; Carter Betz; Gary T. Green

    2008-01-01

    Wilderness and other public land management agencies, both federal and state, have been feeling a pinch. It seems this pinch may partly be in response to a growing perception, or perhaps misperception,that nature-based, especially wildland recreation, is on the decline. This perception has been getting a lot of media attention of late. Some of us who have done research...

  7. Wilderness stewardship in an era of global changes

    Science.gov (United States)

    David J. Parsons

    2006-01-01

    It seems increasingly clear that the primary challenge to the future preservation of wild landscapes will be adapting to the rapidly changing social and biophysical environments within which such areas exist. Established in large part as islands of naturalness, where human influences are minimized, wilderness ecosystems are now threatened by myriad changes, many of...

  8. Idea Notebook: Wilderness Food Planning in the Computer Age.

    Science.gov (United States)

    Drury, Jack K.

    1986-01-01

    Explains the use of a computer as a planning and teaching tool in wilderness trip food planning. Details use of master food list and spreadsheet software such as VisiCalc to provide shopping lists for food purchasing, cost analysis, and diet analysis. (NEC)

  9. Science informs stewardship: Committing to a national wilderness science agenda

    Science.gov (United States)

    Susan A. Fox; Beth A. Hahn

    2016-01-01

    The National Wilderness Preservation System (NWPS) is a vital component of the national and international infrastructure for science, education, and information. The NWPS serves as an important resource for advancing research, from discovering new dinosaurs (Arbour et al. 2014, Landon 2016) to understanding human history on the American landscape (Rasic 2003). The NWPS...

  10. Invasive alien freshwater fishes in the Wilderness Lakes System, a ...

    African Journals Online (AJOL)

    Invasive alien freshwater fishes in the Wilderness Lakes System, a wetland of international importance in the Western Cape Province, South Africa. ... A total of 87 893 fish comprising 16 species were caught. In addition to confirming the ... Key words: freshwater fish, invasive alien fishes, estuary, RAMSAR site, diversity.

  11. Shared principles of restoration practice in the Chicago wilderness region

    Science.gov (United States)

    Christy Watkins; Lynne M. Westphal; Paul H. Gobster; Joanne Vining; Alaka Wali; Madeleine Tudor

    2015-01-01

    We describe the rules, norms, and strategies (institutional statements) that characterize ecological restoration across 10 organizations in the Chicago Wilderness region. Our use of Ostrom's IAD ADICO grammar tool is novel in both context (non-extractive resource management) and data type (qualitative interviews). Results suggest that, in contrast to a focus on...

  12. Reverse design and characteristic study of multi-range HMCVT

    Science.gov (United States)

    Zhu, Zhen; Chen, Long; Zeng, Falin

    2017-09-01

    The reduction of fuel consumption and increase of transmission efficiency is one of the key problems of the agricultural machinery. Many promising technologies such as hydromechanical continuously variable transmissions (HMCVT) are the focus of research and investments, but there is little technical documentation that describes the design principle and presents the design parameters. This paper presents the design idea and characteristic study of HMCVT, in order to find out the suitable scheme for the big horsepower tractors. Analyzed the kinematics and dynamics of a large horsepower tractor, according to the characteristic parameters, a hydro-mechanical continuously variable transmission has been designed. Compared with the experimental curves and theoretical curves of the stepless speed regulation of transmission, the experimental result illustrates the rationality of the design scheme.

  13. Wilderness adventure therapy effects on the mental health of youth participants.

    Science.gov (United States)

    Bowen, Daniel J; Neill, James T; Crisp, Simon J R

    2016-10-01

    Adventure therapy offers a prevention, early intervention, and treatment modality for people with behavioural, psychological, and psychosocial issues. It can appeal to youth-at-risk who are often less responsive to traditional psychotherapeutic interventions. This study evaluated Wilderness Adventure Therapy (WAT) outcomes based on participants' pre-program, post-program, and follow-up responses to self-report questionnaires. The sample consisted of 36 adolescent out-patients with mixed mental health issues who completed a 10-week, manualised WAT intervention. The overall short-term standardised mean effect size was small, positive, and statistically significant (0.26), with moderate, statistically significant improvements in psychological resilience and social self-esteem. Total short-term effects were within age-based adventure therapy meta-analytic benchmark 90% confidence intervals, except for the change in suicidality which was lower than the comparable benchmark. The short-term changes were retained at the three-month follow-up, except for family functioning (significant reduction) and suicidality (significant improvement). For participants in clinical ranges pre-program, there was a large, statistically significant reduction in depressive symptomology, and large to very large, statistically significant improvements in behavioural and emotional functioning. These changes were retained at the three-month follow-up. These findings indicate that WAT is as effective as traditional psychotherapy techniques for clinically symptomatic people. Future research utilising a comparison or wait-list control group, multiple sources of data, and a larger sample, could help to qualify and extend these findings. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  14. Science and stewardship to protect and sustain wilderness values: Seventh World Wilderness Congress symposium; 2001 November 2-8; Port Elizabeth, South Africa

    Science.gov (United States)

    Alan Watson; Janet Sproull

    2003-01-01

    The Seventh World Wilderness Congress met in Port Elizabeth, South Africa, in 2001. The symposium on science and stewardship to protect and sustain wilderness values was one of several symposia held in conjunction with the Congress. The papers contained in this proceedings were presented at this symposium and cover seven topics: state-of-knowledge on protected areas...

  15. Personal, societal, and ecological values of wilderness: Sixth World Wilderness Congress proceedings on research, management, and allocation, Volume II

    Science.gov (United States)

    Alan E. Watson; Greg H. Aplet; John C. Hendee

    2000-01-01

    The papers contained in Volume II of these Proceedings represent a combination of papers originally scheduled for the delayed 1997 meeting of the World Wilderness Congress and those submitted in response to a second call for papers when the Congress was rescheduled for October 24-29, 1998, in Bangalore, India. Just as in Volume I, the papers are divided into seven...

  16. Linking wilderness research and management-volume 3. Recreation fees in wilderness and other public lands: an annotated reading list

    Science.gov (United States)

    Annette Puttkammer; Vita Wright

    2001-01-01

    This annotated reading list provides an introduction to the issue of recreation fees on public lands. With an emphasis on wilderness recreation fees, this compilation of historical and recent publications is divided into the following sections: historical context, arguments for and against fees, pricing mechanisms and the effects of price, public attitudes toward fees...

  17. Personal, societal, and ecological values of wilderness: Sixth World Wilderness Congress proceedings on research, management, and allocation, Volume I

    Science.gov (United States)

    Alan E. Watson; Greg H. Aplet; John C. Hendee

    1998-01-01

    The papers contained in Volume I of these Proceedings were originally scheduled for presentation at the Sixth World Wilderness Congress in Bangalore, India, in 1997. Due to a delay of the Congress until 1998, these 27 papers were compiled for publication prior to presentation. Volumes I and II contain papers covering seven topics: protected area systems: challenges,...

  18. Effects of stock use and backpackers on water quality in wilderness in Sequoia and Kings Canyon National Parks, USA

    Science.gov (United States)

    Clow, David W.; Forrester, Harrison; Miller, Benjamin; Roop, Heidi; Sickman, James O.; Ryu, Hodon; Santo Domingo, Jorge

    2013-01-01

    During 2010-2011, a study was conducted in Sequoia and Kings Canyon National Parks (SEKI) to evaluate the influence of pack animals (stock) and backpackers on water quality in wilderness lakes and streams. The study had three main components: (1) a synoptic survey of water quality in wilderness areas of the parks, (2) paired water-quality sampling above and below several areas with differing types and amounts of visitor use, and (3) intensive monitoring at six sites to document temporal variations in water quality. Data from the synoptic water-quality survey indicated that wilderness lakes and streams are dilute and have low nutrient and Escherichia coli (E. coli) concentrations. The synoptic survey sites were categorized as minimal use, backpacker use, or mixed use (stock and backpackers), depending on the most prevalent type of use upstream from the sampling locations. Sites with mixed use tended to have higher concentrations of most constituents (including E.coli) than those categorized as minimal-use (p≤0.05); concentrations at backpacker-use sites were intermediate. Data from paired-site sampling indicated that E.coli, total coliform, and particulate phosphorus concentrations were greater in streams downstream from mixed-use areas than upstream from those areas (p≤0.05). Paired-site data also indicated few statistically significant differences in nutrient, E. coli, or total coliform concentrations in streams upstream and downstream from backpacker-use areas. The intensive-monitoring data indicated that nutrient and E. coli concentrations normally were low, except during storms, when notable increases in concentrations of E.coli, nutrients, dissolved organic carbon, and turbidity occurred. In summary, results from this study indicate that water quality in SEKI wilderness generally is good, except during storms; and visitor use appears to have a small, but statistically significant influence on stream water quality.

  19. Medical Oversight, Educational Core Content, and Proposed Scopes of Practice of Wilderness EMS Providers: A Joint Project Developed by Wilderness EMS Educators, Medical Directors, and Regulators Using a Delphi Approach.

    Science.gov (United States)

    Millin, Michael G; Johnson, David E; Schimelpfenig, Tod; Conover, Keith; Sholl, Matthew; Busko, Jonnathan; Alter, Rachael; Smith, Will; Symonds, Jennifer; Taillac, Peter; Hawkins, Seth C

    2017-01-01

    A disparity exists between the skills needed to manage patients in wilderness EMS environments and the scopes of practice that are traditionally approved by state EMS regulators. In response, the National Association of EMS Physicians Wilderness EMS Committee led a project to define the educational core content supporting scopes of practice of wilderness EMS providers and the conditions when wilderness EMS providers should be required to have medical oversight. Using a Delphi process, a group of experts in wilderness EMS, representing educators, medical directors, and regulators, developed model educational core content. This core content is a foundation for wilderness EMS provider scopes of practice and builds on both the National EMS Education Standards and the National EMS Scope of Practice Model. These experts also identified the conditions when oversight is needed for wilderness EMS providers. By consensus, this group of experts identified the educational core content for four unique levels of wilderness EMS providers: Wilderness Emergency Medical Responder (WEMR), Wilderness Emergency Medical Technician (WEMT), Wilderness Advanced Emergency Medical Technician (WAEMT), and Wilderness Paramedic (WParamedic). These levels include specialized skills and techniques pertinent to the operational environment. The skills and techniques increase in complexity with more advanced certification levels, and address the unique circumstances of providing care to patients in the wilderness environment. Furthermore, this group identified that providers having a defined duty to act should be functioning with medical oversight. This group of experts defined the educational core content supporting the specific scopes of practice that each certification level of wilderness EMS provider should have when providing patient care in the wilderness setting. Wilderness EMS providers are, indeed, providing health care and should thus function within defined scopes of practice and with

  20. 43 CFR 19.6 - Regulations respecting administration and uses of wilderness areas under jurisdiction of the...

    Science.gov (United States)

    2010-10-01

    ... which may be designated as wilderness areas by statute shall be developed with a view to protecting such... manner as will leave them unimpaired for future use and enjoyment as wilderness, with inconsistent uses...

  1. Girls on Ice: An Inquiry-Based Wilderness Science Education Program

    Science.gov (United States)

    Pettit, E. C.; Koppes, M. N.

    2001-12-01

    We developed a wilderness science education program for high school girls. The program offers opportunities for students to explore and learn about mountain glaciers and the alpine landscape through scientific field studies with geologists and glaciologists. Our purpose is to give students a feeling for the natural processes that create the alpine world and provide an environment that fosters the critical thinking necessary to all scientific inquiry. The program is currently being offered through the North Cascades Institute, a non-profit organization offering outdoor education programs for the general public. We lead eight girls for a weeklong expedition to the remote USGS South Cascade Glacier Research Station in Washington's North Cascades. For four days, we explore the glacier and the nearby alpine valleys. We encourage the girls to observe and think like scientists through making observations and inferences. They develop their own experiments to test ideas about glacier dynamics and geomorphology. In addition to scientific exploration, we engage the students in discussions about the philosophy of science and its role in our everyday lives. Our program exemplifies the success of hands-on, inquiry-based teaching in small groups for science education in the outdoors. The wilderness setting and single gender field team inspires young women's interest in science and provides a challenging environment that increases their physical and intellectual self-confidence.

  2. Unexpected high vulnerability of functions in wilderness areas: evidence from coral reef fishes

    Science.gov (United States)

    Vigliola, Laurent; Graham, Nicholas A. J.; Wantiez, Laurent; Parravicini, Valeriano; Villéger, Sébastien; Mou-Tham, Gerard; Frolla, Philippe; Friedlander, Alan M.; Kulbicki, Michel; Mouillot, David

    2016-01-01

    High species richness is thought to support the delivery of multiple ecosystem functions and services under changing environments. Yet, some species might perform unique functional roles while others are redundant. Thus, the benefits of high species richness in maintaining ecosystem functioning are uncertain if functions have little redundancy, potentially leading to high vulnerability of functions. We studied the natural propensity of assemblages to be functionally buffered against loss prior to fishing activities, using functional trait combinations, in coral reef fish assemblages across unfished wilderness areas of the Indo-Pacific: Chagos Archipelago, New Caledonia and French Polynesia. Fish functional diversity in these wilderness areas is highly vulnerable to fishing, explained by species- and abundance-based redundancy packed into a small combination of traits, leaving most other trait combinations (60%) sensitive to fishing, with no redundancy. Functional vulnerability peaks for mobile and sedentary top predators, and large species in general. Functional vulnerability decreases for certain functional entities in New Caledonia, where overall functional redundancy was higher. Uncovering these baseline patterns of functional vulnerability can offer early warning signals of the damaging effects from fishing, and may serve as baselines to guide precautionary and even proactive conservation actions. PMID:27928042

  3. Morphologic evolution of the wilderness area breach at Fire Island, New York—2012–15

    Science.gov (United States)

    Hapke, Cheryl J.; Nelson, Timothy R.; Henderson, Rachel E.; Brenner, Owen T.; Miselis, Jennifer L.

    2017-09-18

    IntroductionHurricane Sandy, which made landfall on October 29, 2012, near Atlantic City, New Jersey, had a significant impact on the coastal system along the south shore of Long Island, New York. A record significant wave height of 9.6 meters (m) was measured at wave buoy 44025, approximately 48 kilometers offshore of Fire Island, New York. Surge and runup during the storm resulted in extensive beach and dune erosion and breaching of the Fire Island barrier island system at two locations, including a breach that formed within the Otis Pike Fire Island High Dune Wilderness area on the eastern side of Fire Island.The U.S. Geological Survey (USGS) has a long history of conducting morphologic change and processes research at Fire Island. One of the primary objectives of the current research effort is to understand the morphologic evolution of the barrier system on a variety of time scales (from storm scale to decade(s) to century). A number of studies that support the project objectives have been published. Prior to Hurricane Sandy, however, little information was available on specific storm-driven change in this region. The USGS received Hurricane Sandy supplemental funding (project GS2–2B: Linking Coastal Processes and Vulnerability, Fire Island, New York, Regional Study) to enhance existing research efforts at Fire Island. The existing research was greatly expanded to include inner continental shelf mapping and investigations of processes of inner shelf sediment transport; beach and dune response and recovery; and observation, analysis, and modeling of the newly formed breach in the Otis Pike High Dune Wilderness area, herein referred to as the wilderness breach. The breach formed at the site of Old Inlet, which was open from 1763 to 1825. The location of the initial island breaching does not directly correspond with topographic lows of the dunes, but instead the breach formed in the location of a cross-island boardwalk that was destroyed during Hurricane Sandy

  4. Lyme Disease: What the Wilderness Provider Needs to Know.

    Science.gov (United States)

    Forrester, Joseph D; Vakkalanka, J Priyanka; Holstege, Christopher P; Mead, Paul S

    2015-12-01

    Lyme disease is a multisystem tickborne illness caused by the spirochete Borrelia burgdorferi and is the most common vectorborne disease in the United States. Prognosis after initiation of appropriate antibiotic therapy is typically good if treated early. Wilderness providers caring for patients who live in or travel to high-incidence Lyme disease areas should be aware of the basic biology, epidemiology, clinical manifestations, and treatment of Lyme disease. Published by Elsevier Inc.

  5. A Cross-Cultural Exploration of 'Wild' in Wilderness Therapy: Canada, Norway and Australia

    Science.gov (United States)

    Harper, Nevin J.; Gabrielsen, Leiv E.; Carpenter, Cathryn

    2018-01-01

    This paper addresses pluralistic understandings of wilderness in the context of wilderness therapy (WT). The term wilderness perpetuates a modern worldview of place that beyond 'civilisation' exists an environment defined by risk, fear and an unpredictable nature. WT utilises outdoor travel and living practices during therapeutic intervention and…

  6. Potential roles of research in enhancing the performance of management in securing high quality visitor experiences in wilderness

    Science.gov (United States)

    Stephen F. McCool

    2012-01-01

    Does research help managers provide opportunities for visitors to have high quality experiences in wilderness? Difficulties in applying visitor experience research result from several factors: the nature of wilderness itself, the character of the wilderness visitor experience challenge as a research and management topic, and the paradigm of research applications...

  7. Keeping it wild in the National Park Service: A user guide to integrating wilderness character into park planning, management, and monitoring

    Science.gov (United States)

    Peter Landres; Suzy Stutzman; Wade Vagias; Carol Cook; Christina Mills; Tim Devine; Sandee Dingman; Adrienne Lindholm; Miki Stuebe; Melissa Memory; Ruth Scott; Michael Bilecki; Ray O' Neil; Chris Holbeck; Frank Turina; Michael Haynie; Sarah Craighead; Chip Jenkins; Jeremy Curtis; Karen Trevino

    2014-01-01

    This User Guide was developed to help National Park Service (NPS) staff effectively and efficiently fulfill the mandate from the 1964 Wilderness Act and NPS policy to "preserve wilderness character" now and into the future. This mandate applies to all congressionally designated wilderness and other park lands that are, by policy, managed as wilderness,...

  8. Protection of the wilderness and aesthetic values of Antarctica: Geographical Information Systems (GIS) as a tool

    Science.gov (United States)

    Rupert Summerson; Tina Tin

    2011-01-01

    Antarctica is designated by the Antarctic Treaty System as a "natural reserve devoted to peace and science" (http://www.ats.aq/index_e.htm). Multiple, and sometimes conflicting, values are protected. In a place where wilderness protection and certain forms of human activity are both prized, a discussion of the protection of the Antarctic wilderness...

  9. Tribal wilderness research needs and issues in the United States and Canada

    Science.gov (United States)

    Dan McDonald; Tom McDonald; Leo H. McAvoy

    2000-01-01

    This paper represents a dialogue between tribal wilderness managers and researchers on the primary research needs of tribal wilderness in the United States and Canada. The authors identify a number of research priorities for tribal wildlands. The paper also discusses some major issues and challenges faced by researchers conducting research in areas that are culturally...

  10. The nature of conflict between hikers and recreational stock users in the John Muir wilderness

    Science.gov (United States)

    Alan E. Watson; M. J. Niccolucci; Daniel R. Williams

    1994-01-01

    The purpose of this research was to determine the extent of conflict between hikers and recreational stock users in a Sierra Nevada wilderness and to test the relative importance of various hypothetical predictors of conflict using multiple conflict measures. A survey of hikers and recreational stock users of the John Muir Wilderness in California revealed the ability...

  11. The global wilderness seminar for government agencies: a meeting at the crossroads of wildlands stewardship

    Science.gov (United States)

    Nancy Roeper; Peter Landres; Don Fisher

    2006-01-01

    Two days before the 8th World Wilderness Congress began in Alaska, nearly 200 government wildlands managers from 17 countries met to share ideas about common challenges and to explore ways to improve wildland stewardship globally. The goal for this Global Wilderness Seminar for Government Agencies was to lay the foundation for an operating peer network of government...

  12. Wilderness management planning in an Alaskan national park: last chance to do it right?

    Science.gov (United States)

    Michael J. Tranel

    2000-01-01

    Like many wilderness areas, Denali National Park and Preserve faces a variety of challenges in its wilderness management planning. As an Alaska conservation unit that has been significantly expanded by the Alaska National Interest Lands Conservation Act of 1980 (ANILCA), Denali faces the additional responsibility of acknowledging that its management of controversial...

  13. Biodiversity in Finnish wilderness areas: Historical and cultural constraints to preserve species and habitats

    Science.gov (United States)

    Anna-Liisa Sippola

    2002-01-01

    The present status of species and habitats in Finnish wilderness areas is largely a consequence of past administrative, use, and management traditions in northern Finland. The existing wilderness legislation sets a framework for management, but historical uses and administrative decisions have influenced many prevailing practices. In addition, management of many uses...

  14. Goal interference and social value differences: understanding wilderness conflicts and implications for managing social density

    Science.gov (United States)

    Alan E. Watson

    2001-01-01

    Wilderness conflict research has mostly followed the direction of recreation research in the U.S. An interpersonal recreation conflict model proposed in the late 1970s has guided much of the conflict research in wilderness, with emphasis on determining the amount of interpersonal conflict resulting from goal interference and how much one or more hypothesized...

  15. 76 FR 23335 - Wilderness Stewardship Plan/Environmental Impact Statement, Sequoia and Kings Canyon National...

    Science.gov (United States)

    2011-04-26

    ... compliance with Sec. 4(d)(5) of the Wilderness Act. The WSP will reevaluate existing wilderness-related plans... the Web site (to assist in reducing costs, the public is strongly encouraged to accept compact disks... available at any time. While you can ask us in your comment to withhold your personal identifying...

  16. A screening procedure to evaluate air pollution effects on Class I wilderness areas

    Science.gov (United States)

    Douglas G. Fox; Ann M. Bartuska; James G. Byrne; Ellis Cowling; Richard Fisher; Gene E. Likens; Steven E. Lindberg; Rick A. Linthurst; Jay Messer; Dale S. Nichols

    1989-01-01

    This screening procedure is intended to help wilderness managers conduct "adverse impact determinations" as part of Prevention of Significant Deterioration (PSD) applications for sources that emit air pollutants that might impact Class I wildernesses. The process provides an initial estimate of susceptibility to critical loadings for sulfur, nitrogen, and...

  17. Personal and social meanings of wilderness: Constructing and contesting places in a global village

    Science.gov (United States)

    Daniel R. Williams

    2000-01-01

    Description: This paper takes a social constructionist approach to examine the nature and dynamics of personal and social meanings of wilderness. The paper builds on geographic and social theory to discuss the ways in which conflicts over the meaning and value of wilderness are significant consequences of modernization and globalization. The process of modernization...

  18. The role of wilderness experiences in leaders’ development toward authentic leadership

    NARCIS (Netherlands)

    Droffelaar, van Boy; Jacobs, M.H.

    2017-01-01

    Purpose – The purpose of this paper is to investigate the impact of leaders’ wilderness experiences on intentions to transform leadership behaviors toward authentic leadership. Design/methodology/approach – Content analysis was used on trail reports made by participants of a wilderness-based

  19. The evolving role of science in wilderness to our understanding of ecosystems and landscapes

    Science.gov (United States)

    Norman L. Christensen

    2000-01-01

    Research in wilderness areas (areas with minimal human activity and of large spatial extent) formed the foundation for ecological models and theories that continue to shape our understanding how ecosystems change through time, how ecological communities are structured and how ecosystems function. By the middle of this century, large expanses of wilderness had become...

  20. Perspectives from the Aldo Leopold Wilderness Research Institute: The Wildland Research institute

    Science.gov (United States)

    J. M. Bowker; H. Ken Cordell; Neelam C. Poudyal

    2014-01-01

    The Wildland Research Institute (WRi) at the University of Leeds (UK) came into being in October 2009. Its origins go back to a United Kingdom research councilfunded seminar series called Wilderness Britain? which ran between 1998 and 2000 and was coordinated from the University of Leeds. This opened up the wider debate on wilderness and rewilding in the UK and later...

  1. The prevalence and significance of displacement for wilderness recreation management and research

    Science.gov (United States)

    Ingrid E. Schneider

    2007-01-01

    The concept of visitor displacement has important implications for wilderness management and research. Research on actual displacement of wilderness visitors is extremely limited, but this displacement likely follows patterns found for general recreationists: visitors employ a variety of coping responses and displacement is prevalent. Understanding if and when visitors...

  2. Twenty-eight years of wilderness campsite monitoring in Yosemite National Park

    Science.gov (United States)

    Laurel Boyers; Mark Fincher; Jan van Wagtendonk

    2000-01-01

    The research, resource management and wilderness staffs in Yosemite National Park recently completed the third 10-year cycle of a wilderness campsite impact monitoring program. Initial results indicate an overall improvement in conditions due to a strong restoration program, decreased use and increased visitor education. Lessons learned point to the necessity for ample...

  3. The US Wilderness Managers Survey: Charting a path for the future

    Science.gov (United States)

    Chad P. Dawson; Ken Cordell; Alan E. Watson; Ramesh Ghimire; Gary T. Green

    2016-01-01

    The Wilderness Manager Survey (WMS) was developed in 2014 to support interagency strategic planning for the National Wilderness Preservation System (NWPS) and asked managers about their perceived threats to the NWPS, the need for science information to support decisionmaking, the need for education and training, and the most important problems for managers in the...

  4. Streamflow monitoring and statistics for development of water rights claims for Wild and Scenic Rivers, Owyhee Canyonlands Wilderness, Idaho, 2012

    Science.gov (United States)

    Wood, Molly S.; Fosness, Ryan L.

    2013-01-01

    The U.S. Geological Survey, in cooperation with the Bureau of Land Management (BLM), collected streamflow data in 2012 and estimated streamflow statistics for stream segments designated "Wild," "Scenic," or "Recreational" under the National Wild and Scenic Rivers System in the Owyhee Canyonlands Wilderness in southwestern Idaho. The streamflow statistics were used by BLM to develop and file a draft, federal reserved water right claim in autumn 2012 to protect federally designated "outstanding remarkable values" in the stream segments. BLM determined that the daily mean streamflow equaled or exceeded 20 and 80 percent of the time during bimonthly periods (two periods per month) and the bankfull streamflow are important streamflow thresholds for maintaining outstanding remarkable values. Prior to this study, streamflow statistics estimated using available datasets and tools for the Owyhee Canyonlands Wilderness were inaccurate for use in the water rights claim. Streamflow measurements were made at varying intervals during February–September 2012 at 14 monitoring sites; 2 of the monitoring sites were equipped with telemetered streamgaging equipment. Synthetic streamflow records were created for 11 of the 14 monitoring sites using a partial‑record method or a drainage-area-ratio method. Streamflow records were obtained directly from an operating, long-term streamgage at one monitoring site, and from discontinued streamgages at two monitoring sites. For 10 sites analyzed using the partial-record method, discrete measurements were related to daily mean streamflow at a nearby, telemetered “index” streamgage. Resulting regression equations were used to estimate daily mean and annual peak streamflow at the monitoring sites during the full period of record for the index sites. A synthetic streamflow record for Sheep Creek was developed using a drainage-area-ratio method, because measured streamflows did not relate well to any index site to allow use of the partial

  5. Gaps and opportunities for the World Heritage Convention to contribute to global wilderness conservation.

    Science.gov (United States)

    Allan, James R; Kormos, Cyril; Jaeger, Tilman; Venter, Oscar; Bertzky, Bastian; Shi, Yichuan; Mackey, Brendan; van Merm, Remco; Osipova, Elena; Watson, James E M

    2018-02-01

    Wilderness areas are ecologically intact landscapes predominantly free of human uses, especially industrial-scale activities that result in substantial biophysical disturbance. This definition does not exclude land and resource use by local communities who depend on such areas for subsistence and bio-cultural connections. Wilderness areas are important for biodiversity conservation and sustain key ecological processes and ecosystem services that underpin planetary life-support systems. Despite these widely recognized benefits and values of wilderness, they are insufficiently protected and are consequently being rapidly eroded. There are increasing calls for multilateral environmental agreements to make a greater and more systematic contribution to wilderness conservation before it is too late. We created a global map of remaining terrestrial wilderness following the established last-of-the-wild method, which identifies the 10% of areas with the lowest human pressure within each of Earth's 62 biogeographic realms and identifies the 10 largest contiguous areas and all contiguous areas >10,000 km 2 . We used our map to assess wilderness coverage by the World Heritage Convention and to identify gaps in coverage. We then identified large nationally designated protected areas with good wilderness coverage within these gaps. One-quarter of natural and mixed (i.e., sites of both natural and cultural value) World Heritage Sites (WHS) contained wilderness (total of 545,307 km 2 ), which is approximately 1.8% of the world's wilderness extent. Many WHS had excellent wilderness coverage, for example, the Okavango Delta in Botswana (11,914 km 2 ) and the Central Suriname Nature Reserve (16,029 km 2 ). However, 22 (35%) of the world's terrestrial biorealms had no wilderness representation within WHS. We identified 840 protected areas of >500 km 2 that were predominantly wilderness (>50% of their area) and represented 18 of the 22 missing biorealms. These areas offer a starting

  6. Wilderness medicine: strategies for provision of medical support for adventure racing.

    Science.gov (United States)

    Townes, David A

    2005-01-01

    In adventure racing, or multisporting, athletes perform multiple disciplines over a course in rugged, often remote, wilderness terrain. Disciplines may include, but are not limited to, hiking, trail running, mountain biking, caving, technical climbing, fixed-line mountaineering, flat- and white-water boating, and orienteering. While sprint races may be as short as 6 hours, expedition-length adventure races last a minimum of 36 hours up to 10 days or more and may cover hundreds of kilometres. Over the past decade, adventure racing has grown in popularity throughout the world with increasing numbers of events and participants each year. The provision of on-site medical care during these events is essential to ensure the health and safety of the athletes and thus the success of the sport. At present, there are no formal guidelines and a relatively small amount of literature to assist in the development of medical support plans for these events. This article provides an introduction to the provision of medical support for adventure races. Since a wide variety of illness and injury occur during these events, the medical support plan should provide for proper personnel, equipment and supplies to provide care for a wide range of illness and injury. Foot-related problems are the most common reasons for athletes to require medical attention during these events. This article also highlights some of the controversies involved in the provision of medical support for these events. Suggested penalties for acceptance of medical care during the event and strategies for removal of an athlete from the event for medical reasons are offered. In addition, some of the challenges involved in the provision of medical support, including communication, logistics and liability are discussed. This information should prove useful for medical directors of future, similar events. Because of their extreme nature, expedition-length adventure races represent a new and unique area of wilderness and

  7. Wilderness experience in Rocky Mountain National Park 2002; report to respondents

    Science.gov (United States)

    Schuster, Elke; Johnson, S. Shea; Taylor, Jonathan G.

    2003-01-01

    A substantial amount of backcountry (about 250,000 acres) in Rocky Mountain National Park [RMNP of the Park] may be designated as wilderness areas in the coming years. Currently, over 3 million visitors drives through the park on Trail Ridge Road, camp in designated campgrounds, day hike, etc. each year. Many of those visitors also report using the backcountry-wilderness areas that are not easily accessible by roads or trails. Use of the backcountry is growing at RMNP and is accompanied by changing visitor expectations and preferences for wilderness management. For these reasons it is of great importance for the Park to periodically assess what types of environments and conditions wilderness users seek to facilitate a quality experience. To assist in this effort, the Political Analysis and Science Assistance [PSAS] program / Fort Collins Center / U.S. Geological Survey, in close collaboration with personnel and volunteers from RMNP, as well as the Natural Resource Recreation and Tourism [NRRT] Department at Colorado State University, launched a research effort in the summer of 2002 to investigate visitorsa?? wilderness experiences in the Park. Specifically, the purpose of this research was: (1) To determine what constitutes a wilderness experience; (2) To identify important places, visual features, and sounds essential to a quality wilderness experience and; (3) To determine what aspects may detract from wilderness experience. Thus, answers to these questions should provide insight for Park managers about visitorsa?? expectation for wilderness recreation and the conditions they seek for quality wilderness experiences. Ultimately, this information can be used to support wilderness management decisions within RMNP. The social science technique of Visitor Employed Photography [VEP] was used to obtain information from visitors about wilderness experiences. Visitors were selected at random from Park-designated wilderness trails, in proportion to their use, and asked to

  8. Investigation of Sylvatic Typhus at a Wilderness Camp

    Centers for Disease Control (CDC) Podcasts

    In this podcast, Dr. Greg Dasch discusses an outbreak of four cases of sylvatic typhus that occurred at a wilderness camp in Pennsylvania. Sylvatic typhus is very rare in the United States, with only 41 cases since it was discovered in the United States in 1975. Lab work at CDC and the discovery that all four camp counselors who became ill had slept in the same bunk at the camp between 2004 and 2006 ultimately led to confirmation that flying squirrels living in the wall of the cabin were to blame for the illnesses.

  9. Aeromagnetic map of the Sandia Mountain Wilderness, Bernalillo and Sandoval counties, New Mexico

    Science.gov (United States)

    Hedlund, D.C.; Cordell, L.E.

    1985-01-01

    During 1981 and 1982 the U.S. Geological Survey and the U.S. Bureau of Mimes conducted field investigations to evaluate the mineral resource potential of the Sandia Mountain Wilderness, Bernalillo and Sandoval Counties, New Mexico. This report and map represent only the results of the aeromagnetic compilation from previous publications (U.S. geological Survey, 1975a,b,c). The wilderness encompasses 61 mi2 (37,232 acres) within the Cibola National Forest, but the map area is about 145 mi2 and includes areas adjacent to the wilderness boundary.

  10. Pre-Participation Medical Evaluation for Adventure and Wilderness Watersports.

    Science.gov (United States)

    Nathanson, Andrew T; Young, Justin Mark J; Young, Craig

    2015-12-01

    A request for a preparticipation medical evaluation for wilderness watersports may be made by guiding agencies, instructional camps, or by patients presenting for an annual visit. Although guidelines have been published regarding preparticipation physical evaluation for traditional competitive high school and collegiate sports, little has been written about medical evaluations for those wishing to engage in wilderness and adventure watersports. in this article, we offer guidance based on literature review and expert opinion. Watersports are among the most common recreational activities in the United states and are generally safe. Drowning, however, is a significant risk, particularly in small, self-propelled craft, and among children. Medical counseling before participation in watersports should include screening for medical conditions which may impair swimming ability, including a history of seizures, heart disease, and lung disease. Physicians should also promote preventive health measures such as use of lifejackets and sun protection, as well as alcohol avoidance. Swim testing tailored to specific activities should be strongly considered for children and those with questionable swimming ability. Copyright © 2015. Published by Elsevier Inc.

  11. Methods for studying short-range order in solid binary solutions

    International Nuclear Information System (INIS)

    Beranger, Gerard

    1969-12-01

    The short range order definition and its characteristic parameters are first recalled. The different methods to study the short range order are then examined: X ray diffusion, electrical resistivity, specific heat and thermoelectric power, neutron diffraction, electron spin resonance, study of thermodynamic and mechanical properties. The theory of the X ray diffraction effects due to short range order and the subsequent experimental method are emphasized. The principal results obtained from binary Systems, by the different experimental techniques, are reported and briefly discussed. The Au-Cu, Li-Mg, Au-Ni and Cu-Zn Systems are moreover described. (author) [fr

  12. 3 CFR 8409 - Proclamation 8409 of September 3, 2009. National Wilderness Month, 2009

    Science.gov (United States)

    2010-01-01

    ... American people of present and future generations the benefits of an enduring resource of wilderness.” The... protection laws in many of our States and in countries around the world. The vision and structure established...

  13. Public participation in wilderness and backcountry litter control: a review of research and management experience.

    Science.gov (United States)

    Robert M. Muth; Roger N. Clark

    1978-01-01

    This paper describes the application of the Incentive System for Litter Control to wilderness and backcountry environments. Based on research, observation, and management experience, a set of procedures was developed and is presented here. Additional management considerations are discussed.

  14. Wilderness experience in Rocky Mountain National Park 2002: Report to RMNP

    Science.gov (United States)

    Schuster, Elke; Johnson, S. Shea; Taylor, Jonathan G.

    2004-01-01

    Approximately 250,000 acres of backcountry in Rocky Mountain National Park (RMNP or the Park) may be designated as wilderness use areas in the coming years. Currently, over 3 million people visit RMNP each year; many drive through the park on Trail Ridge Road, camp in designated campgrounds, or hike in front-country areas. However, visitors also report much use of backcountry areas that are not easily accessible by roads or trails. Use of the backcountry is growing at RMNP and is accompanied by changing visitor expectations and preferences for wilderness management. For these reasons it is of great importance for the Park to periodically assess what types of environments and conditions wilderness users seek, to help them facilitate a quality wilderness experience.

  15. Long-range transport and global fractionation of POPs: insights from multimedia modeling studies

    International Nuclear Information System (INIS)

    Scheringer, M.; Salzmann, M.; Stroebe, M.; Wegmann, F.; Fenner, K.; Hungerbuehler, K.

    2004-01-01

    The long-range transport of persistent organic pollutants (POPs) is investigated with two multimedia box models of the global system. ChemRange is a purely evaluative, one-dimensional steady-state (level III) model; CliMoChem is a two-dimensional model with different temperatures, land/water ratios and vegetation types in different latitudinal zones. Model results are presented for three case studies: (i) the effect of atmospheric aerosol particles on the long-range transport of POPs, (ii) the effect of oceanic deposition on the long-range transport of different PCB congeners, (iii) the global fractionation of different PCB congeners. The model results for these case studies show: (i) the low atmospheric half-lives estimated for several organochlorine pesticides are likely to be inconsistent with the observed long-range transport of these compounds; (ii) export to the deep sea reduces the potential for long-range transport of highly hydrophobic compounds (but does not remove these chemicals from the biosphere); (iii) there are different meanings of the term global fractionation that refer to different aspects of the fractionation process and need to be distinguished. The case-study results further indicate that the influences of varying environmental conditions on the physicochemical properties and the degradation rate constants of POPs need to be determined. - Multimedia box models are applied to case studies of the behavior of POPs

  16. Study of an Ising model with competing long- and short-range interactions

    International Nuclear Information System (INIS)

    Loew, U.; Emery, V.J.; Fabricius, K.; Kivelson, S.A.

    1994-01-01

    A classical spin-one lattice gas model is used to study the competition between short-range ferromagnetic coupling and long-range antiferromagnetic Coulomb interactions. The model is a coarse-grained representation of frustrated phase separation in high-temperature superconductors. The ground states are determined for the complete range of parameters by using a combination of numerical and analytical techniques. The crossover between ferromagnetic and antiferromagnetic states proceeds via a rich structure of highly symmetric striped and checkerboard phases. There is no devil's staircase behavior because mixtures of stripes with different period phase separate

  17. Study of titanium nitride elasticity characteristics in the homogeneity range by ultrasonic resonance method

    International Nuclear Information System (INIS)

    Khidirov, I.; Khajdarov, T.

    1995-01-01

    Elasticity characteristics of cubic and tetragonal phases of titanium nitride in the homogeneity range were studied for the first time by ultrasonic resonance method. It is established that the Young modulus, the shift and volume module of cubic titanium nitride elasticity in the homogeneity range change nonlinearly with decrease in nitrogen concentration and correlate with concentration dependences of other physical properties.15 refs., 2 figs

  18. Normal range of facial asymmetry in spherical coordinates: a CBCT study

    Energy Technology Data Exchange (ETDEWEB)

    Yoon, Suk Ja [Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju (Korea, Republic of); Wang, Rui Feng [Research Laboratory Specialist Intermediate, Department of Biologic and Material Sciences, School of Dentistry, University of Michigan, Ann Arbor, MI (United States); Na, Hee Ja [Dept. ofDental Hygiene, Honam University, Gwangju (Korea, Republic of); Palomo, Juan Matin [Dept. of Orthodontics, School of Dental Medicine, Case Western Reserve University, Cleveland (United States)

    2013-03-15

    This study aimed to measure the bilateral differences of facial lines in spherical coordinates from faces within a normal range of asymmetry utilizing cone-beam computed tomography (CBCT). CBCT scans from 22 females with normal symmetric-looking faces (mean age 24 years and 8 months) were selected for the study. The average menton deviation was 1.01{+-}0.66 mm. The spherical coordinates, length, and midsagittal and coronal inclination angles of the ramal and mandibular lines were calculated from CBCT. The bilateral differences in the facial lines were determined. All of the study subjects had minimal bilateral differences of facial lines. The normal range of facial asymmetry of the ramal and mandibular lines was obtained in spherical coordinates. The normal range of facial asymmetry in the spherical coordinate system in this study should be useful as a reference for diagnosing facial asymmetry.

  19. Note: long-range scanning tunneling microscope for the study of nanostructures on insulating substrates.

    Science.gov (United States)

    Molina-Mendoza, Aday J; Rodrigo, José G; Island, Joshua; Burzuri, Enrique; Rubio-Bollinger, Gabino; van der Zant, Herre S J; Agraït, Nicolás

    2014-02-01

    The scanning tunneling microscope (STM) is a powerful tool for studying the electronic properties at the atomic level, however, it is of relatively small scanning range and the fact that it can only operate on conducting samples prevents its application to study heterogeneous samples consisting of conducting and insulating regions. Here we present a long-range scanning tunneling microscope capable of detecting conducting micro and nanostructures on insulating substrates using a technique based on the capacitance between the tip and the sample and performing STM studies.

  20. Note: Long-range scanning tunneling microscope for the study of nanostructures on insulating substrates

    Energy Technology Data Exchange (ETDEWEB)

    Molina-Mendoza, Aday J., E-mail: aday.molina@uam.es [Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Campus de Cantoblanco, E-28049 Madrid (Spain); Rodrigo, José G.; Rubio-Bollinger, Gabino [Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Campus de Cantoblanco, E-28049 Madrid (Spain); Condensed Matter Physics Center (IFIMAC) and Instituto Universitario de Ciencia de Materiales “Nicolás Cabrera,” Universidad Autónoma de Madrid, Campus de Cantoblanco, E-28049 Madrid (Spain); Island, Joshua; Burzuri, Enrique; Zant, Herre S. J. van der [Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft (Netherlands); Agraït, Nicolás [Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Campus de Cantoblanco, E-28049 Madrid (Spain); Condensed Matter Physics Center (IFIMAC) and Instituto Universitario de Ciencia de Materiales “Nicolás Cabrera,” Universidad Autónoma de Madrid, Campus de Cantoblanco, E-28049 Madrid (Spain); Instituto Madrileño de Estudios Avanzados en Nanociencia IMDEA-Nanociencia, E-28049 Madrid (Spain)

    2014-02-15

    The scanning tunneling microscope (STM) is a powerful tool for studying the electronic properties at the atomic level, however, it is of relatively small scanning range and the fact that it can only operate on conducting samples prevents its application to study heterogeneous samples consisting of conducting and insulating regions. Here we present a long-range scanning tunneling microscope capable of detecting conducting micro and nanostructures on insulating substrates using a technique based on the capacitance between the tip and the sample and performing STM studies.

  1. Study of CT-based positron range correction in high resolution 3D PET imaging

    Energy Technology Data Exchange (ETDEWEB)

    Cal-Gonzalez, J., E-mail: jacobo@nuclear.fis.ucm.es [Grupo de Fisica Nuclear, Dpto. Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid (Spain); Herraiz, J.L. [Grupo de Fisica Nuclear, Dpto. Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid (Spain); Espana, S. [Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA (United States); Vicente, E. [Grupo de Fisica Nuclear, Dpto. Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid (Spain); Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain); Herranz, E. [Grupo de Fisica Nuclear, Dpto. Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid (Spain); Desco, M. [Unidad de Medicina y Cirugia Experimental, Hospital General Universitario Gregorio Maranon, Madrid (Spain); Vaquero, J.J. [Dpto. de Bioingenieria e Ingenieria Espacial, Universidad Carlos III, Madrid (Spain); Udias, J.M. [Grupo de Fisica Nuclear, Dpto. Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid (Spain)

    2011-08-21

    Positron range limits the spatial resolution of PET images and has a different effect for different isotopes and positron propagation materials. Therefore it is important to consider it during image reconstruction, in order to obtain optimal image quality. Positron range distributions for most common isotopes used in PET in different materials were computed using the Monte Carlo simulations with PeneloPET. The range profiles were introduced into the 3D OSEM image reconstruction software FIRST and employed to blur the image either in the forward projection or in the forward and backward projection. The blurring introduced takes into account the different materials in which the positron propagates. Information on these materials may be obtained, for instance, from a segmentation of a CT image. The results of introducing positron blurring in both forward and backward projection operations was compared to using it only during forward projection. Further, the effect of different shapes of positron range profile in the quality of the reconstructed images with positron range correction was studied. For high positron energy isotopes, the reconstructed images show significant improvement in spatial resolution when positron range is taken into account during reconstruction, compared to reconstructions without positron range modeling.

  2. Study of CT-based positron range correction in high resolution 3D PET imaging

    International Nuclear Information System (INIS)

    Cal-Gonzalez, J.; Herraiz, J.L.; Espana, S.; Vicente, E.; Herranz, E.; Desco, M.; Vaquero, J.J.; Udias, J.M.

    2011-01-01

    Positron range limits the spatial resolution of PET images and has a different effect for different isotopes and positron propagation materials. Therefore it is important to consider it during image reconstruction, in order to obtain optimal image quality. Positron range distributions for most common isotopes used in PET in different materials were computed using the Monte Carlo simulations with PeneloPET. The range profiles were introduced into the 3D OSEM image reconstruction software FIRST and employed to blur the image either in the forward projection or in the forward and backward projection. The blurring introduced takes into account the different materials in which the positron propagates. Information on these materials may be obtained, for instance, from a segmentation of a CT image. The results of introducing positron blurring in both forward and backward projection operations was compared to using it only during forward projection. Further, the effect of different shapes of positron range profile in the quality of the reconstructed images with positron range correction was studied. For high positron energy isotopes, the reconstructed images show significant improvement in spatial resolution when positron range is taken into account during reconstruction, compared to reconstructions without positron range modeling.

  3. Cervical isometric strength and range of motion of elite rugby union players: a cohort study.

    Science.gov (United States)

    Hamilton, David F; Gatherer, Don

    2014-01-01

    Head and neck injury is relatively common in Rugby Union. Despite this, strength and range-of-motion characteristics of the cervical spine are poorly characterised. The aim of this study was to provide data on the strength and range-of-motion of the cervical spine of professional rugby players to guide clinical rehabilitation. A cohort study was performed evaluating 27 players from a single UK professional rugby club. Cervical isometric strength and range-of-motion were assessed in 3 planes of reference. Anthropometric data was collected and multivariate regression modelling performed with a view to predicting cervical isometric strength. Largest forces were generated in extension, with broadly equal isometric side flexion forces at around 90% of extension values. The forwards generated significantly more force than the backline in all parameters bar flexion. The forwards had substantially reduced cervical range-of-motion and larger body mass, with differences observed in height, weight, neck circumference and chest circumference (p isometric extension (adjusted R(2) = 30.34). Rehabilitative training programs aim to restore individuals to pre-injury status. This work provides reference ranges for the strength and range of motion of the cervical spine of current elite level rugby players.

  4. Investigation of Sylvatic Typhus at a Wilderness Camp

    Centers for Disease Control (CDC) Podcasts

    2009-06-30

    In this podcast, Dr. Greg Dasch discusses an outbreak of four cases of sylvatic typhus that occurred at a wilderness camp in Pennsylvania. Sylvatic typhus is very rare in the United States, with only 41 cases since it was discovered in the United States in 1975. Lab work at CDC and the discovery that all four camp counselors who became ill had slept in the same bunk at the camp between 2004 and 2006 ultimately led to confirmation that flying squirrels living in the wall of the cabin were to blame for the illnesses.  Created: 6/30/2009 by Emerging Infectious Diseases.   Date Released: 6/30/2009.

  5. A Study on Techniques for Focusing Circumferential Array Guided Waves for Long Range Inspection of Pipes

    International Nuclear Information System (INIS)

    Kang, To; Kim, Hak Joon; Song, Sung Jin; Cho, Young Do; Lee, Dong Hoon; Cho, Hyun Joon

    2009-01-01

    Ultrasonic guided waves have been widely utilized for long range inspection of structures. Especially, development of array guided waves techniques and its application for long range gas pipe lines(length of from hundreds meters to few km) were getting increased. In this study, focusing algorithm for array guided waves was developed in order to improve long range inspectability and accuracy of the array guided waves techniques for long range inspection of gas pipes, and performance of the developed techniques was verified by experiments using the developed array guided wave system. As a result, S/N ratio of array guided wave signals obtained with the focusing algorithm was increased higher than that of signals without focusing algorithm

  6. Teaching wilderness first aid in a remote First Nations community: the story of the Sachigo Lake Wilderness Emergency Response Education Initiative.

    Science.gov (United States)

    Born, Karen; Orkin, Aaron; VanderBurgh, David; Beardy, Jackson

    2012-01-01

    To understand how community members of a remote First Nations community respond to an emergency first aid education programme. A qualitative study involving focus groups and participant observation as part of a community-based participatory research project, which involved the development and implementation of a wilderness first aid course in collaboration with the community. Twenty community members participated in the course and agreed to be part of the research focus groups. Three community research partners validated and reviewed the data collected from this process. These data were coded and analysed using open coding. Community members responded to the course in ways related to their past experiences with injury and first aid, both as individuals and as members of the community. Feelings of confidence and self-efficacy related access to care and treatment of injury surfaced during the course. Findings also highlighted how the context of the remote First Nations community influenced the delivery and development of course materials. Developing and delivering a first aid course in a remote community requires sensitivity towards the response of participants to the course, as well as the context in which it is being delivered. Employing collaborative approaches to teaching first aid can aim to address these unique needs. Though delivery of a first response training programme in a small remote community will probably not impact the morbidity and mortality associated with injury, it has the potential to impact community self-efficacy and confidence when responding to an emergency situation.

  7. Study on the KM capacitor base thermometers in the 42-273 K range

    International Nuclear Information System (INIS)

    Luzganov, V.S.; Mats'ko, A.A.

    1988-01-01

    Thermometric characteristics of the KM-5a-HZ0 monolithic capacitors in the 42-273 K temperature range are studied. Capacitors capacitance - temperature relation is considered in details. The data reproducibility after 5, 23, 34, 50, 51 and 57 days is studied, the accuracy of temperature measurements by the given thermometers is determined. Recommendations on selection of cpacitors, suitable for application as thermometer, are given. These capacitors permit temperature measurement in the 42-225 K range with the error of ± 0.5 K, and above 225 K the error is ± 1K. 8 refs.; 1 fig.; 1 tab

  8. Time-reversed lasing in the terahertz range and its preliminary study in sensor applications

    Energy Technology Data Exchange (ETDEWEB)

    Shen, Yun, E-mail: shenyunoptics@gmail.com [Department of Physics, Nanchang University, Nanchang 330031 (China); Liu, Huaqing [Department of Physics, Nanchang University, Nanchang 330031 (China); Deng, Xiaohua [Institute of Space Science and Technology, Nanchang University, Nanchang 330031 (China); Wang, Guoping [Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072 (China)

    2017-02-05

    Time-reversed lasing in a uniform slab and a grating structure are investigated in the terahertz range. The results show that both the uniform slab and grating can support terahertz time-reversed lasing. Nevertheless, due to the tunable effective refractive index, the grating structure can not only exhibit time-reversed lasing more effectively and flexibly than a uniform slab, but also can realize significant absorption in a broader operating frequency range. Furthermore, applications of terahertz time-reversed lasing for novel concentration/thickness sensors are preliminarily studied in a single-channel coherent perfect absorber system. - Highlights: • Time-reversed lasing are investigated in the terahertz range. • The grating structure exhibit time-reversed lasing more effectively and flexibly than a uniform slab. • THz time-reversed lasing for novel concentration/thickness sensors are studied.

  9. Experimental study on stabilizing range extension of diamagnetic levitation under modulated magnetic field

    Energy Technology Data Exchange (ETDEWEB)

    Chow, T C S; Wong, P L; Liu, K P, E-mail: 50578230@student.cityu.edu.h, E-mail: meplwong@cityu.edu.h, E-mail: mekpliu@cityu.edu.h [Manufacturing Engineering and Engineering Management Department, City University of Hong Kong, Tat Chee Avenue, Kowloon (Hong Kong)

    2010-01-01

    The real energy-free levitation exists with the help of diamagnetic material. Its ultra-high sensitivity to force is particularly attractive to micro/nano force sensing. A key parameter: Levitation Stabilizing Local Range, LR (allowable moving range of the floater) is critical to the load and self-rotating performance. Besides, larger LR reduces the energy loss due to the eddy current and has greater application potential. Recently, an idea of extending the LR by a modulating coil array has been validated using numerical simulation. This paper takes the next move to carry out an experimental study on the shape effect of stacked coil arrays with different currents on LR.

  10. Expanding Our Horizons. Wilderness Education Association Proceedings of the National Conference on Outdoor Leadership (Estes Park, Colorado, February 18-20, 2005)

    Science.gov (United States)

    Phipps, Maurice, Ed.; Hayashi, Aya, Ed.

    2005-01-01

    This document presents the proceedings of the Wilderness Education Association's 2005 National Conference on Outdoor Leadership. Following a brief history of the Wilderness Education Association (WEA), 21 conference papers are presented. Topics of the conference papers include: wilderness education curriculum, programs, history, environmental…

  11. THE PRELIMINARY STUDIES ON THE INFLUENCE OF SHOOTING RANGES ON ENVIRONMENT

    Directory of Open Access Journals (Sweden)

    Karolina Wodnik

    2017-08-01

    Full Text Available The aim of the study was to assess the impact of the shooting activity on the environment. The studies were conducted in the area of the sports shooting range. The invertebrates assemblages were identified to the family level as well as morphospecies. The second method do not require the proficiency in identification. The following indices of the biodiversity were used for the assessment of the impact of sports shooting ranges: Simpson, Shannon-Wiener, Margalef, Berger-Parker and Menhinick. A decreased biodiversity was observed at two studied sites comparing to the reference site what proves the influence of shooting activity on the biodiversity and suggest disturbance of the ecosystem integrity because of shooting activity.

  12. Study of the effect of short ranged ordering on the magnetism in FeCr alloys

    Energy Technology Data Exchange (ETDEWEB)

    Jena, Ambika Prasad, E-mail: apjena@bose.res.in [Department of Condensed Matter and Materials Science, S N Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700098 (India); Sanyal, Biplab, E-mail: biplab.sanyal@physics.uu.se [Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala (Sweden); Mookerjee, Abhijit, E-mail: abhijit.mookerjee61@gmail.com [Department of Condensed Matter and Materials Science, S N Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700098 (India)

    2014-01-15

    For the study of magnetism in systems where the local environment plays an important role, we propose a marriage between the Monte Carlo simulation and Zunger's special quasi-random structures. We apply this technique on disordered FeCr alloys and show that our estimates of the transition temperature is in good agreement with earlier experiments. - Highlights: • The magnetism in FeCr is sensitively depended on the ordering of the atoms : disordered or with short ranged ordering. • This work uses the SQS technique suggested by Zunger has been used to generate various degrees of short range ordering in FeCr. • The electronic structure and pair energies have been obatined from first principles ASR and Lichtenstein methods. • The effect of chemical ordering on magnetic ordering is studied in detail. • Only those situations where the chemical ordering is complete have been studied.

  13. Study of the effect of short ranged ordering on the magnetism in FeCr alloys

    International Nuclear Information System (INIS)

    Jena, Ambika Prasad; Sanyal, Biplab; Mookerjee, Abhijit

    2014-01-01

    For the study of magnetism in systems where the local environment plays an important role, we propose a marriage between the Monte Carlo simulation and Zunger's special quasi-random structures. We apply this technique on disordered FeCr alloys and show that our estimates of the transition temperature is in good agreement with earlier experiments. - Highlights: • The magnetism in FeCr is sensitively depended on the ordering of the atoms : disordered or with short ranged ordering. • This work uses the SQS technique suggested by Zunger has been used to generate various degrees of short range ordering in FeCr. • The electronic structure and pair energies have been obatined from first principles ASR and Lichtenstein methods. • The effect of chemical ordering on magnetic ordering is studied in detail. • Only those situations where the chemical ordering is complete have been studied

  14. The Role of Wilderness Protection and Societal Engagement as Indicators of Well-Being: An Examination of Change at the Boundary Waters Canoe Area Wilderness

    Science.gov (United States)

    Watson, Alan E.

    2013-01-01

    A societal decision to protect over 9 million acres of land and water for its wilderness character in the early 1960s reflected US wealth in natural resources, pride in the nation's cultural history and our commitment to the well-being of future generations to both experience wild nature and enjoy benefits flowing from these natural ecosystems.…

  15. The role of wilderness protection and societal engagement as indicators of well-being: An examination of change at the Boundary Waters Canoe Area Wilderness

    Science.gov (United States)

    Alan E. Watson

    2011-01-01

    A societal decision to protect over 9 million acres of land and water for its wilderness character in the early 1960s reflected US wealth in natural resources, pride in the nation's cultural history and our commitment to the well-being of future generations to both experience wild nature and enjoy benefits flowing from these natural ecosystems. There is no...

  16. Twentieth-century fire patterns in the Selway-Bitterroot Wilderness Area, Idaho/Montana, and the Gila/Aldo Leopold Wilderness Complex, New Mexico

    Science.gov (United States)

    Matthew Rollins; Tom Swetnam; Penelope Morgan

    2000-01-01

    Twentieth century fire patterns were analyzed for two large, disparate wilderness areas in the Rocky Mountains. Spatial and temporal patterns of fires were represented as GIS-based digital fire atlases compiled from archival Forest Service data. We find that spatial and temporal fire patterns are related to landscape features and changes in land use. The rate and...

  17. Study of identification of geometrically shaped solids using colour and range information

    International Nuclear Information System (INIS)

    Ebihara, Kenichi

    1997-05-01

    This report is the revision of the Technical Report (MECSE 1996-7) of Monash University in Melbourne, Australia which has been distributed to the Department Library in this University. The main work which is described in this report was carried out at Intelligent Robotics Research Center (IRRC) in the Department of Electrical and Computer Systems Engineering of Monash University from March in 1995 to March in 1996 and was be supported by a grant from Research Development Corporation of Japan (JRDC). This report describes the study of identification of geometrically shaped solids with unique colour using colour and range information. This study aims at recognition of equipment in nuclear plants. For this purpose, it is hypothesized that equipment in nuclear plants can be represented by combination of geometrically shaped solids with unique colour, such as a sphere, an ellipsoid, a cone, a cylinder, a rectangular solid and a pyramid. In this report, the colour image of geometrically shaped solids could be segmented comparatively easily and effectively into regions of each solid by using colour and range information. The range data of each solid was extracted using the segmented colour image. Thus the extracted range data could be classified into a plane surface or a curved surface by checking its spatial distribution. (author)

  18. 36 CFR 294.2 - Navigation of aircraft within airspace reservation over the Boundary Waters Canoe Area Wilderness...

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Navigation of aircraft within airspace reservation over the Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota... Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota. (a) Description of areas...

  19. The application of the wilderness concept in Antarctica and Svalbard : A comparison of the respective regulatory systems

    NARCIS (Netherlands)

    Neumann, Antje

    2016-01-01

    The wilderness values of Antarctica receive explicit legal protection under the Environmental Protocol to the Antarctic Treaty. However, different opinions exist, on the one hand, as regards the precise meaning of the wilderness concept at the international and national level and, on the other hand,

  20. 36 CFR 293.16 - Special provisions governing the Boundary Waters Canoe Area Wilderness, Superior National Forest...

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Special provisions governing the Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota. 293.16 Section 293.16 Parks, Forests, and Public Property FOREST SERVICE, DEPARTMENT OF AGRICULTURE WILDERNESS-PRIMITIVE AREAS...

  1. The impact of technology on the wilderness experience: A review of common themes and approaches in three bodies of literature

    Science.gov (United States)

    John Shultis

    2012-01-01

    In the last decade, increasing concern has been expressed about the impact of new technologies - especially communication technologies - on the wilderness experience. Many authors have suggested a tipping point has been reached, with new technologies changing the very nature of the 'traditional' wilderness experience in various ways. The loss of direct...

  2. 75 FR 54296 - Information Collection; Trends in Use and Users in the Boundary Waters Canoe Area Wilderness, MN

    Science.gov (United States)

    2010-09-07

    ... notice should be addressed to Alan E. Watson, Aldo Leopold Wilderness Research Institute, USDA Forest... submitted by e-mail to: [email protected] . The public may inspect comments received at the Aldo Leopold... to the building. FOR FURTHER INFORMATION CONTACT: Alan E. Watson, Aldo Leopold Wilderness Research...

  3. Study of TeV range cosmic ray detection with Cherenkov imaging techniques

    International Nuclear Information System (INIS)

    Ansari, R.; Gaillard, J.M.; Parrour, G.

    1992-03-01

    The Monte Carlo study of cosmic ray detection in the TeV energy range has been triggered by the authors' interest in the ARTEMIS (Antimatter Research Through the Earth Moon Ion Spectrometer) proposal. The properties of cosmic ray showers detected by Cherenkov imaging in the visible domain are studied. The detection sensitivity and the accuracy of the reconstruction of the parent particle direction using Cherenkov imaging are discussed. The backbone of the study is the atmospheric shower Monte Carlo generator developed by A.M. Hillas. A comparison between nucleon and photon induced showers of Cherenkov detection is also included. (R.P.) 14 refs., 48 figs., 3 tabs

  4. Echocardiographic reference ranges for normal left atrial function parameters: results from the EACVI NORRE study.

    Science.gov (United States)

    Sugimoto, Tadafumi; Robinet, Sébastien; Dulgheru, Raluca; Bernard, Anne; Ilardi, Federica; Contu, Laura; Addetia, Karima; Caballero, Luis; Kacharava, George; Athanassopoulos, George D; Barone, Daniele; Baroni, Monica; Cardim, Nuno; Hagendorff, Andreas; Hristova, Krasimira; Lopez, Teresa; de la Morena, Gonzalo; Popescu, Bogdan A; Penicka, Martin; Ozyigit, Tolga; Rodrigo Carbonero, Jose David; van de Veire, Nico; Von Bardeleben, Ralph Stephan; Vinereanu, Dragos; Zamorano, Jose Luis; Go, Yun Yun; Marchetta, Stella; Nchimi, Alain; Rosca, Monica; Calin, Andreea; Moonen, Marie; Cimino, Sara; Magne, Julien; Cosyns, Bernard; Galli, Elena; Donal, Erwan; Habib, Gilbert; Esposito, Roberta; Galderisi, Maurizio; Badano, Luigi P; Lang, Roberto M; Lancellotti, Patrizio

    2018-02-23

    To obtain the normal ranges for echocardiographic measurements of left atrial (LA) function from a large group of healthy volunteers accounting for age and gender. A total of 371 (median age 45 years) healthy subjects were enrolled at 22 collaborating institutions collaborating in the Normal Reference Ranges for Echocardiography (NORRE) study of the European Association of Cardiovascular Imaging (EACVI). Left atrial data sets were analysed with a vendor-independent software (VIS) package allowing homogeneous measurements irrespective of the echocardiographic equipment used to acquire data sets. The lowest expected values of LA function were 26.1%, 48.7%, and 41.4% for left atrial strain (LAS), 2D left atrial emptying fraction (LAEF), and 3D LAEF (reservoir function); 7.7%, 24.2%, and -0.53/s for LAS-active, LAEF-active, and LA strain rate during LA contraction (SRa) (pump function) and 12.0% and 21.6% for LAS-passive and LAEF-passive (conduit function). Left atrial reservoir and conduit function were decreased with age while pump function was increased. All indices of reservoir function and all LA strains had no difference in both gender and vendor. However, inter-vendor differences were observed in LA SRa despite the use of VIS. The NORRE study provides contemporary, applicable echocardiographic reference ranges for LA function. Our data highlight the importance of age-specific reference values for LA functions.

  5. An echocardiographic study of healthy Border Collies with normal reference ranges for the breed.

    Science.gov (United States)

    Jacobson, Jake H; Boon, June A; Bright, Janice M

    2013-06-01

    The objectives of this study were to obtain standard echocardiographic measurements from healthy Border Collies and to compare these measurements to those previously reported for a general population of dogs. Standard echocardiographic data were obtained from twenty apparently healthy Border Collie dogs. These data (n = 20) were compared to data obtained from a general population of healthy dogs (n = 69). Border Collies were deemed healthy based on normal history, physical examination, complete blood count, serum biochemical profile, electrocardiogram, and blood pressure, with no evidence of congenital or acquired heart disease on echocardiographic examination. Standard two dimensional, M-mode, and Doppler echocardiographic measurements were obtained and normal ranges determined. The data were compared to data previously obtained at our hospital from a general population of normal dogs. Two dimensional, M-mode, and Doppler reference ranges for healthy Border Collies are presented in tabular form. Comparison of the weight adjusted M-mode echocardiographic means from Border Collies to those from the general population of dogs showed Border Collies to have larger left ventricular systolic and diastolic dimensions, smaller interventricular septal thickness, and lower fractional shortening. There are differences in some echocardiographic parameters between healthy Border Collies and the general dog population, and the echocardiographic reference ranges provided in this study should be used as breed specific reference values for Border Collies. Copyright © 2013 Elsevier B.V. All rights reserved.

  6. Study on super-resolution three-dimensional range-gated imaging technology

    Science.gov (United States)

    Guo, Huichao; Sun, Huayan; Wang, Shuai; Fan, Youchen; Li, Yuanmiao

    2018-04-01

    Range-gated three dimensional imaging technology is a hotspot in recent years, because of the advantages of high spatial resolution, high range accuracy, long range, and simultaneous reflection of target reflectivity information. Based on the study of the principle of intensity-related method, this paper has carried out theoretical analysis and experimental research. The experimental system adopts the high power pulsed semiconductor laser as light source, gated ICCD as the imaging device, can realize the imaging depth and distance flexible adjustment to achieve different work mode. The imaging experiment of small imaging depth is carried out aiming at building 500m away, and 26 group images were obtained with distance step 1.5m. In this paper, the calculation method of 3D point cloud based on triangle method is analyzed, and 15m depth slice of the target 3D point cloud are obtained by using two frame images, the distance precision is better than 0.5m. The influence of signal to noise ratio, illumination uniformity and image brightness on distance accuracy are analyzed. Based on the comparison with the time-slicing method, a method for improving the linearity of point cloud is proposed.

  7. Regional deposition of nasal sprays in adults: A wide ranging computational study.

    Science.gov (United States)

    Kiaee, Milad; Wachtel, Herbert; Noga, Michelle L; Martin, Andrew R; Finlay, Warren H

    2018-05-01

    The present work examines regional deposition within the nose for nasal sprays over a large and wide ranging parameter space by using numerical simulation. A set of 7 realistic adult nasal airway geometries was defined based on computed tomography images. Deposition in 6 regions of each nasal airway geometry (the vestibule, valve, anterior turbinate, posterior turbinate, olfactory, and nasopharynx) was determined for varying particle diameter, spray cone angle, spray release direction, particle injection speed, and particle injection location. Penetration of nasal spray particles through the airway geometries represented unintended lung exposure. Penetration was found to be relatively insensitive to injection velocity, but highly sensitive to particle size. Penetration remained at or above 30% for particles exceeding 10 μm in diameter for several airway geometries studied. Deposition in the turbinates, viewed as desirable for both local and systemic nasal drug delivery, was on average maximized for particles ranging from ~20 to 30 μm in diameter, and for low to zero injection velocity. Similar values of particle diameter and injection velocity were found to maximize deposition in the olfactory region, a potential target for nose-to-brain drug delivery. However, olfactory deposition was highly variable between airway geometries, with maximum olfactory deposition ranging over 2 orders of magnitude between geometries. This variability is an obstacle to overcome if consistent dosing between subjects is to be achieved for nose-to-brain drug delivery. Copyright © 2018 John Wiley & Sons, Ltd.

  8. Fighting in thin air: operational wilderness medicine in high Asia.

    Science.gov (United States)

    Rodway, George W; Muza, Stephen R

    2011-12-01

    The current conflict in Afghanistan is the first major military action in which the United States and other North Atlantic Treaty Organization (NATO) forces have found themselves regularly engaged in combat at high altitudes. However, high altitude warfare is not a new concept in Asia by any means. This article will offer a short general historical review of high altitude warfare in Asia and then specifically address some of the operational challenges faced by troops carrying out missions at high altitude in the ongoing conflict in Afghanistan. Additionally, there will be discussion of evidence-based interventions being used to attempt to maintain optimal health of the warfighter at high altitude in this theater of operations. Years of research into how to alleviate the problematic nature of military operations in the high altitude environment has resulted in extensive risk management recommendations from the US Army, specifically aimed at preventing altitude-related casualties. Copyright © 2011 Wilderness Medical Society. Published by Elsevier Inc. All rights reserved.

  9. A Detailed Study of Debris Flow Source Areas in the Northern Colorado Front Range.

    Science.gov (United States)

    Arana-Morales, A.; Baum, R. L.; Godt, J.

    2014-12-01

    Nearly continuous, heavy rainfall occurred during 9-13 September 2013 causing flooding and widespread landslides and debris flows in the northern Colorado Front Range. Whereas many recent studies have identified erosion as the most common process leading to debris flows in the mountains of Colorado, nearly all of the debris flows mapped in this event began as small, shallow landslides. We mapped the boundaries of 415 September 2013 debris flows in the Eldorado Springs and Boulder 7.5-minute quadrangles using 0.5-m-resolution satellite imagery. We characterized the landslide source areas of six debris flows in the field as part of an effort to identify what factors controlled their locations. Four were on a dip slope in sedimentary rocks in the Pinebrook Hills area, near Boulder, and the other two were in granitic rocks near Gross Reservoir. Although we observed no obvious geomorphic differences between the source areas and surrounding non-landslide areas, we noted several characteristics that the source areas all had in common. Slopes of the source areas ranged from 28° to 35° and most occurred on planar or slightly concave slopes that were vegetated with grass, small shrubs, and sparse trees. The source areas were shallow, irregularly shaped, and elongated downslope: widths ranged from 4 to 9 m, lengths from 6 to 40 m and depths ranged from 0.7 to 1.2 m. Colluvium was the source material for all of the debris flows and bedrock was exposed in the basal surface of all of the source areas. We observed no evidence for concentrated surface runoff upslope from the sources. Local curvature and roughness of bedrock and surface topography, and depth distribution and heterogeneity of the colluvium appear to have controlled the specific locations of these shallow debris-flow source areas. The observed distribution and characteristics of the source areas help guide ongoing efforts to model initiation of the debris flows.

  10. Study on The Extended Range Weather Forecast of Low Frequency Signal Based on Period Analysis Method

    Science.gov (United States)

    Li, X.

    2016-12-01

    Although many studies have explored the MJO and its application for weather forecasting, low-frequency oscillation has been insufficiently studied for the extend range weather forecasting over middle and high latitudes. In China, low-frequency synoptic map is a useful tool for meteorological operation department to forecast extend range weather. It is therefore necessary to develop objective methods to serve the need for finding low-frequency signal, interpretation and application of this signal in the extend range weather forecasting. In this paper, method of Butterworth band pass filter was applied to get low-frequency height field at 500hPa from 1980 to 2014 by using NCEP/NCAR daily grid data. Then period analysis and optimal subset regression methods were used to process the low frequency data of 150 days before the first forecast day and extend the low frequency signal of 500hPa low-frequency high field to future 30 days in the global from June to August during 2011-2014. Finally, the results were test. The main results are as follows: (1) In general, the fitting effect of low frequency signals of 500hPa low-frequency height field by period analysis in the northern hemisphere was better than that in the southern hemisphere, and was better in the low latitudes than that in the high latitudes. The fitting accuracy gradually reduced with the increase of forecast time length, which tended to be stable during the late forecasting period. (2) The fitting effects over the 6 key regions in China showed that except filtering result over Xinjiang area in the first 10 days and 30 days, filtering results over the other 5 key regions throughout the whole period have passed reliability test with level more than 95%. (3) The center and scope of low and high low frequency systems can be fitted well by using the methods mentioned above, which is consist with the corresponding use of the low-frequency synoptic map for the prediction of the extended period. Application of the

  11. Wilderness First Aid Training as a Tool for Improving Basic Medical Knowledge in South Sudan.

    Science.gov (United States)

    Katona, Lindsay B; Douglas, William S; Lena, Sean R; Ratner, Kyle G; Crothers, Daniel; Zondervan, Robert L; Radis, Charles D

    2015-12-01

    The challenges presented by traumatic injuries in low-resource communities are especially relevant in South Sudan. This study was conducted to assess whether a 3-day wilderness first aid (WFA) training course taught in South Sudan improved first aid knowledge. Stonehearth Open Learning Opportunities (SOLO) Schools designed the course to teach people with limited medical knowledge to use materials from their environment to provide life-saving care in the event of an emergency. A pre-test/post-test study design was used to assess first aid knowledge of 46 community members in Kit, South Sudan, according to a protocol approved by the University of New England Institutional Review Board. The course and assessments were administered in English and translated in real-time to Acholi and Arabic, the two primary languages spoken in the Kit region. Descriptive statistics, t-test, ANOVA, and correlation analyses were conducted. Results included a statistically significant improvement in first aid knowledge after the 3-day training course: t(38)=3.94; Pfirst of its kind in South Sudan, provides evidence that a WFA training course in South Sudan is efficacious. These findings suggest that similar training opportunities could be used in other parts of the world to improve basic medical knowledge in communities with limited access to medical resources and varying levels of education and professional experiences.

  12. Study of the short-range 3He structure from the dd→3Hen reaction

    International Nuclear Information System (INIS)

    Ladygin, V.P.; Ladygina, N.V.

    1995-01-01

    An experiment on studying of the tensor analysing power C 0,NN,0,0 and spin correlation C N,N,0,0 due to the transverse polarization of both initial particles from the dd→ 3 Hen reaction has been proposed. Those polarization observables are very sensitive to the short-range 3 He structure. This experiment is proposed to be done at the LHE Accelerator Complex using both a polarized deuteron beam and a polarized deuterium target. 25 refs., 2 figs

  13. Automatic control of scale range applied for analog study of reactor kinetics

    International Nuclear Information System (INIS)

    Sergent, O.; Tellier, N.

    1967-01-01

    We study the response of a reactor, initially in a sub-critical state, for linear release of reactivity obeying to the following criteria, a rod drop comes in 10 seconds after the moment when the neutron power becomess equal to 10 -3 times the nominal power. We are interested in the maximum reactivity reached and in the energy released during the power excursion. For the power varying in a range from 1 to 10 10 we have used the method of automatic change scale which was installed and described in a previous report [fr

  14. Numerical study of the glass-glass transition in short-ranged attractive colloids

    International Nuclear Information System (INIS)

    Zaccarelli, Emanuela; Sciortino, Francesco; Tartaglia, Piero

    2004-01-01

    We report extensive numerical simulations in the glass region for a simple model of short-ranged attractive colloids, the square well model. We investigate the behaviour of the density autocorrelation function and of the static structure factor in the region of temperatures and packing fractions where a glass-glass transition is expected according to theoretical predictions. We strengthen our observations by studying both waiting time and history dependence of the numerical results. We provide evidence supporting the possibility that activated bond-breaking processes destabilize the attractive glass, preventing the full observation of a sharp glass-glass kinetic transition

  15. Model Study of Wave Overtopping of Marine Structure for a Wide Range of Geometric Parameters

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter

    2000-01-01

    The objective of the study described in this paper is to enable estimation of wave overtopping rates for slopes/ramps given by a wide range of geometric parameters when subjected to varying wave conditions. To achieve this a great number of model tests are carried out in a wave tank using irregul...... 2-D waves. On the basis of the first part of these tests an exponential overtopping expression for a linear slope, including the effect of limited draught and varying slope angle, is presented. The plans for further tests with other slope geometries are described....

  16. Measuring sensitivity in pharmacoeconomic studies. Refining point sensitivity and range sensitivity by incorporating probability distributions.

    Science.gov (United States)

    Nuijten, M J

    1999-07-01

    The aim of the present study is to describe a refinement of a previously presented method, based on the concept of point sensitivity, to deal with uncertainty in economic studies. The original method was refined by the incorporation of probability distributions which allow a more accurate assessment of the level of uncertainty in the model. In addition, a bootstrap method was used to create a probability distribution for a fixed input variable based on a limited number of data points. The original method was limited in that the sensitivity measurement was based on a uniform distribution of the variables and that the overall sensitivity measure was based on a subjectively chosen range which excludes the impact of values outside the range on the overall sensitivity. The concepts of the refined method were illustrated using a Markov model of depression. The application of the refined method substantially changed the ranking of the most sensitive variables compared with the original method. The response rate became the most sensitive variable instead of the 'per diem' for hospitalisation. The refinement of the original method yields sensitivity outcomes, which greater reflect the real uncertainty in economic studies.

  17. The continual reassessment method: comparison of Bayesian stopping rules for dose-ranging studies.

    Science.gov (United States)

    Zohar, S; Chevret, S

    2001-10-15

    The continual reassessment method (CRM) provides a Bayesian estimation of the maximum tolerated dose (MTD) in phase I clinical trials and is also used to estimate the minimal efficacy dose (MED) in phase II clinical trials. In this paper we propose Bayesian stopping rules for the CRM, based on either posterior or predictive probability distributions that can be applied sequentially during the trial. These rules aim at early detection of either the mis-choice of dose range or a prefixed gain in the point estimate or accuracy of estimated probability of response associated with the MTD (or MED). They were compared through a simulation study under six situations that could represent the underlying unknown dose-response (either toxicity or failure) relationship, in terms of sample size, probability of correct selection and bias of the response probability associated to the MTD (or MED). Our results show that the stopping rules act correctly, with early stopping by using the two first rules based on the posterior distribution when the actual underlying dose-response relationship is far from that initially supposed, while the rules based on predictive gain functions provide a discontinuation of inclusions whatever the actual dose-response curve after 20 patients on average, that is, depending mostly on the accumulated data. The stopping rules were then applied to a data set from a dose-ranging phase II clinical trial aiming at estimating the MED dose of midazolam in the sedation of infants during cardiac catheterization. All these findings suggest the early use of the two first rules to detect a mis-choice of dose range, while they confirm the requirement of including at least 20 patients at the same dose to reach an accurate estimate of MTD (MED). A two-stage design is under study. Copyright 2001 John Wiley & Sons, Ltd.

  18. Using natural range of variation to set decision thresholds: a case study for great plains grasslands

    Science.gov (United States)

    Symstad, Amy J.; Jonas, Jayne L.; Edited by Guntenspergen, Glenn R.

    2014-01-01

    Natural range of variation (NRV) may be used to establish decision thresholds or action assessment points when ecological thresholds are either unknown or do not exist for attributes of interest in a managed ecosystem. The process for estimating NRV involves identifying spatial and temporal scales that adequately capture the heterogeneity of the ecosystem; compiling data for the attributes of interest via study of historic records, analysis and interpretation of proxy records, modeling, space-for-time substitutions, or analysis of long-term monitoring data; and quantifying the NRV from those data. At least 19 National Park Service (NPS) units in North America’s Great Plains are monitoring plant species richness and evenness as indicators of vegetation integrity in native grasslands, but little information on natural, temporal variability of these indicators is available. In this case study, we use six long-term vegetation monitoring datasets to quantify the temporal variability of these attributes in reference conditions for a variety of Great Plains grassland types, and then illustrate the implications of using different NRVs based on these quantities for setting management decision thresholds. Temporal variability of richness (as measured by the coefficient of variation, CV) is fairly consistent across the wide variety of conditions occurring in Colorado shortgrass prairie to Minnesota tallgrass sand savanna (CV 0.20–0.45) and generally less than that of production at the same sites. Temporal variability of evenness spans a greater range of CV than richness, and it is greater than that of production in some sites but less in other sites. This natural temporal variability may mask undesirable changes in Great Plains grasslands vegetation. Consequently, we suggest that managers consider using a relatively narrow NRV (interquartile range of all richness or evenness values observed in reference conditions) for designating a surveillance threshold, at which

  19. Natural circulation studies in a LBE loop for a wide range of temperature

    International Nuclear Information System (INIS)

    Borgohain, A.; Srivastava, A.K.; Jana, S.S.; Maheshwari, N.K.; Kulkarni, R.D.; Vijayan, P.K.; Tewari, R.; Ram, A. Maruthi; Jha, S.K.

    2016-01-01

    Highlights: • A high temperature Lead Bismuth Eutectic loop named as Kilo Temperature Loop (KTL) has been made. • Natural circulation experimental studies were carried out and reported in the range of 200–780 °C. • The experiments at high temperature were carried in inert atmosphere to avoid oxidation of the loop material. • Theoretical studies are carried out to simulate the loop with natural circulation in primary as well as in the secondary side. • The predictions of the code LeBENC used to simulate the natural circulation in the loop are compared with the experimental results. - Abstract: Lead–Bismuth Eutectic (LBE) is increasingly getting more attention as a coolant for advanced reactor systems. It is also the primary coolant of the Compact High Temperature Reactor (CHTR) being designed at Bhabha Atomic Research Centre (BARC). A high temperature liquid metal loop named as Kilo Temperature Loop (KTL) has been installed at BARC for thermal hydraulics, instrument development and material related studies. Natural circulation experimental studies were carried out for the power range of 200–1200 W in the loop. The corresponding LBE flow rate is calculated to be in the range of 0.075–0.12 kg/s. Transient studies for start-up of natural circulation in the loop, loss of heat sink and step power change have also been carried out. The maximum temperature of the loop operated so far is 1100 °C. A computer code named LeBENC has been developed at BARC to simulate the natural circulation characteristics in closed loops. The salient features of the code include ability to handle non-uniform diameter components, axial thermal conduction in fluid and heat losses from the piping to the environment. The code has been modified to take into account of two natural circulation loops in series so that the natural cooling by argon gas in the secondary side of the loop can be simulated. This paper deals with the description of the loop and its operation. The various

  20. Good neighbours: even bears kept happy by the new approach to wilderness project

    International Nuclear Information System (INIS)

    Stonehouse, D.

    2000-01-01

    Experiences gained by Husky Oil and Rigel Energy drilling a successful exploratory well in Kananaskis country, Calgary's wilderness playground, are described. 'Fitting in' with the character of 'K-country' entailed developing a plan acceptable to recreational users, aboriginal groups, government agencies, and environmentalists. The result was a landmark effort in industrial adaptation to nature: the Eastern Slope Grizzly Bear Project, a major cumulative effects assessment, which is now gaining acceptance as an industry model. The assessment involved surveying the distribution of deer, elk, moose, sheep, rare plants, breeding birds and fish species and the tracking and mapping of the movements of bears, to get a complete picture of the health of the eastern slope habitat, and to provide the foundation for assessing development and land use. The study showed Husky Oil how to proceed without doing environmental damage. It influenced the manner in which the field was delineated, it altered production tests, it forced reinjection of fluids and gas during well testing rather than hauling it away in trucks, it determined the type and route for the access road and later the location of the pipeline, all in an effort to stay clear of high quality ungulate and bear habitat. It was time consuming and expensive, but according to company officials, well worth it. Development was also influenced by traditional land use and preservation of native cultural resources; for example, the pipeline was rerouted to avoid archaeological sites

  1. Good neighbours: even bears kept happy by the new approach to wilderness project

    Energy Technology Data Exchange (ETDEWEB)

    Stonehouse, D.

    2000-04-01

    Experiences gained by Husky Oil and Rigel Energy drilling a successful exploratory well in Kananaskis country, Calgary's wilderness playground, are described. 'Fitting in' with the character of 'K-country' entailed developing a plan acceptable to recreational users, aboriginal groups, government agencies, and environmentalists. The result was a landmark effort in industrial adaptation to nature: the Eastern Slope Grizzly Bear Project, a major cumulative effects assessment, which is now gaining acceptance as an industry model. The assessment involved surveying the distribution of deer, elk, moose, sheep, rare plants, breeding birds and fish species and the tracking and mapping of the movements of bears, to get a complete picture of the health of the eastern slope habitat, and to provide the foundation for assessing development and land use. The study showed Husky Oil how to proceed without doing environmental damage. It influenced the manner in which the field was delineated, it altered production tests, it forced reinjection of fluids and gas during well testing rather than hauling it away in trucks, it determined the type and route for the access road and later the location of the pipeline, all in an effort to stay clear of high quality ungulate and bear habitat. It was time consuming and expensive, but according to company officials, well worth it. Development was also influenced by traditional land use and preservation of native cultural resources; for example, the pipeline was rerouted to avoid archaeological sites.

  2. A Range Correction for Icesat and Its Potential Impact on Ice-sheet Mass Balance Studies

    Science.gov (United States)

    Borsa, A. A.; Moholdt, G.; Fricker, H. A.; Brunt, Kelly M.

    2014-01-01

    We report on a previously undocumented range error in NASA's Ice, Cloud and land Elevation Satellite (ICESat) that degrades elevation precision and introduces a small but significant elevation trend over the ICESat mission period. This range error (the Gaussian-Centroid or 'G-C'offset) varies on a shot-to-shot basis and exhibits increasing scatter when laser transmit energies fall below 20 mJ. Although the G-C offset is uncorrelated over periods less than1 day, it evolves over the life of each of ICESat's three lasers in a series of ramps and jumps that give rise to spurious elevation trends of -0.92 to -1.90 cm yr(exp -1), depending on the time period considered. Using ICESat data over the Ross and Filchner-Ronne ice shelves we show that (1) the G-C offset introduces significant biases in ice-shelf mass balance estimates, and (2) the mass balance bias can vary between regions because of different temporal samplings of ICESat.We can reproduce the effect of the G-C offset over these two ice shelves by fitting trends to sample-weighted mean G-C offsets for each campaign, suggesting that it may not be necessary to fully repeat earlier ICESat studies to determine the impact of the G-C offset on ice-sheet mass balance estimates.

  3. Novel acoustic technology for studying free-ranging shark social behaviour by recording individuals' interactions.

    Directory of Open Access Journals (Sweden)

    Tristan L Guttridge

    Full Text Available Group behaviours are widespread among fish but comparatively little is known about the interactions between free-ranging individuals and how these might change across different spatio-temporal scales. This is largely due to the difficulty of observing wild fish groups directly underwater over long enough time periods to quantify group structure and individual associations. Here we describe the use of a novel technology, an animal-borne acoustic proximity receiver that records close-spatial associations between free-ranging fish by detection of acoustic signals emitted from transmitters on other individuals. Validation trials, held within enclosures in the natural environment, on juvenile lemon sharks Negaprion brevirostris fitted with external receivers and transmitters, showed receivers logged interactions between individuals regularly when sharks were within 4 m ( approximately 4 body lengths of each other, but rarely when at 10 m distance. A field trial lasting 17 days with 5 juvenile lemon sharks implanted with proximity receivers showed one receiver successfully recorded association data, demonstrating this shark associated with 9 other juvenile lemon sharks on 128 occasions. This study describes the use of acoustic underwater proximity receivers to quantify interactions among wild sharks, setting the scene for new advances in understanding the social behaviours of marine animals.

  4. Clever mothers balance time and effort in parental care: a study on free-ranging dogs.

    Science.gov (United States)

    Paul, Manabi; Sau, Shubhra; Nandi, Anjan K; Bhadra, Anindita

    2017-01-01

    Mammalian offspring require parental care, at least in the form of nursing during their early development. While mothers need to invest considerable time and energy in ensuring the survival of their current offspring, they also need to optimize their investment in one batch of offspring in order to ensure future reproduction and hence lifetime reproductive success. Free-ranging dogs live in small social groups, mate promiscuously and lack the cooperative breeding biology of other group-living canids. They face high early-life mortality, which in turn reduces fitness benefits of the mother from a batch of pups. We carried out a field-based study on free-ranging dogs in India to understand the nature of maternal care. Our analysis reveals that mothers reduce investment in energy-intensive active care and increase passive care as the pups grow older, thereby keeping overall levels of care more or less constant over pup age. Using the patterns of mother-pup interactions, we define the different phases of maternal care behaviour.

  5. Positron range in tissue-equivalent materials: experimental microPET studies

    Science.gov (United States)

    Alva-Sánchez, H.; Quintana-Bautista, C.; Martínez-Dávalos, A.; Ávila-Rodríguez, M. A.; Rodríguez-Villafuerte, M.

    2016-09-01

    In this work an experimental investigation was carried out to study the effect that positron range has over positron emission tomography (PET) scans through measurements of the line spread function (LSF) in tissue-equivalent materials. Line-sources consisted of thin capillary tubes filled with 18F, 13N or 68Ga water-solution inserted along the axis of symmetry of cylindrical phantoms constructed with the tissue-equivalent materials: lung (inhale and exhale), adipose tissue, solid water, trabecular and cortical bone. PET scans were performed with a commercial small-animal PET scanner and image reconstruction was carried out with filtered-backprojection. Line-source distributions were analyzed using radial profiles taken on axial slices from which the spatial resolution was determined through the full-width at half-maximum, tenth-maximum, twentieth-maximum and fiftieth-maximum. A double-Gaussian model of the LSFs was used to fit experimental data which can be incorporated into iterative reconstruction methods. In addition, the maximum activity concentration in the line-sources was determined from reconstructed images and compared to the known values for each case. The experimental data indicates that positron range in different materials has a strong effect on both spatial resolution and activity concentration quantification in PET scans. Consequently, extra care should be taken when computing standard-uptake values in PET scans, in particular when the radiopharmaceutical is taken up by different tissues in the body, and more even so with high-energy positron emitters.

  6. On Road Study of Colorado Front Range Greenhouse Gases Distribution and Sources

    Science.gov (United States)

    Petron, G.; Hirsch, A.; Trainer, M. K.; Karion, A.; Kofler, J.; Sweeney, C.; Andrews, A.; Kolodzey, W.; Miller, B. R.; Miller, L.; Montzka, S. A.; Kitzis, D. R.; Patrick, L.; Frost, G. J.; Ryerson, T. B.; Robers, J. M.; Tans, P.

    2008-12-01

    The Global Monitoring Division and Chemical Sciences Division of the NOAA Earth System Research Laboratory have teamed up over the summer 2008 to experiment with a new measurement strategy to characterize greenhouse gases distribution and sources in the Colorado Front Range. Combining expertise in greenhouse gases measurements and in local to regional scales air quality study intensive campaigns, we have built the 'Hybrid Lab'. A continuous CO2 and CH4 cavity ring down spectroscopic analyzer (Picarro, Inc.), a CO gas-filter correlation instrument (Thermo Environmental, Inc.) and a continuous UV absorption ozone monitor (2B Technologies, Inc., model 202SC) have been installed securely onboard a 2006 Toyota Prius Hybrid vehicle with an inlet bringing in outside air from a few meters above the ground. To better characterize point and distributed sources, air samples were taken with a Portable Flask Package (PFP) for later multiple species analysis in the lab. A GPS unit hooked up to the ozone analyzer and another one installed on the PFP kept track of our location allowing us to map measured concentrations on the driving route using Google Earth. The Hybrid Lab went out for several drives in the vicinity of the NOAA Boulder Atmospheric Observatory (BAO) tall tower located in Erie, CO and covering areas from Boulder, Denver, Longmont, Fort Collins and Greeley. Enhancements in CO2, CO and destruction of ozone mainly reflect emissions from traffic. Methane enhancements however are clearly correlated with nearby point sources (landfill, feedlot, natural gas compressor ...) or with larger scale air masses advected from the NE Colorado, where oil and gas drilling operations are widespread. The multiple species analysis (hydrocarbons, CFCs, HFCs) of the air samples collected along the way bring insightful information about the methane sources at play. We will present results of the analysis and interpretation of the Hybrid Lab Front Range Study and conclude with perspectives

  7. Multi-functional measurement systems for studying photon-hadron interactions in the intermediate energy range

    International Nuclear Information System (INIS)

    Baranov, P.S.; Vol'nov, M.I.; Eliseev, A.N.

    1983-01-01

    The PION multifunctional time-of-flight measurement system operating on-line with the D-116 computer is described. The system is designed to study proton-hadron interaction processes using the PACHRA synchrotron beam. The following devices are involved into the basic permanent system equipment: two gamma telescope counters, neutron spectrometer, scintillation mass spectrometer, and also cryogenic liquid hydrogen and liquid deuterium targets, ionization chambers, and quantometer. The time-of-flight neutron spectrometer consists of 4 coordinate-sensitive scintillation counters, before which the logic detector operating in the anticoincidence regime is placed. Information acquisition and measurement system control are accomplished by the computer using the CAMAK modules. The above system allows one to observe at the same time different physical processes and to carry out simultaneous measurements in a wide energy range

  8. A study on the excore neutron flux monitoring system for the wide range measurement

    International Nuclear Information System (INIS)

    Han, Sang Jun; Jeong, Dae Won; Baek, Kwang Il; Lee, Jeong Yang; Ha, Jae Hong

    1995-11-01

    This paper describes a study in which only one kind of neutron detector were used in the advanced ENFMS. The conceptual design was performed for overall system with unified fission chamber. The system consists of detector, junction box, wide-range amplifier and signal processing device. Also the requirements of 10CFR50 App. R were considered in design. On the other hand, through computer simulation, the characteristics of pulse-count mode and MSV mode was scrutinized and each noise withstanding capability was analyzed. The results say that 3rd moment has the more stable characteristics to background noise than MSV method. Also, to remain the integrity of information against noise, during installation and operation, the overall system of KSNP was analyzed from a view of noise. By administration for the cause of noise and noise-coupling paths, through the full understanding of noise characteristics, the transfer of the noise source can be minimized. (Author)

  9. Using epiphytic lichens to monitor nitrogen deposition near natural gas drilling operations in the Wind River Range, WY, USA

    Science.gov (United States)

    Jill A. McMurray; Dave W. Roberts; Mark E. Fenn; Linda H. Geiser; Sarah Jovan

    2013-01-01

    Rapid expansion of natural gas drilling in Sublette County, WY (1999-present), has raised concerns about the potential ecological effects of enhanced atmospheric nitrogen (N) deposition to the Wind River Range (WRR) including the Class I BridgerWilderness. We sampled annual throughfall (TF) N deposition and lichen thalli N concentrations under forest canopies in four...

  10. Theoretical Study of Radiation from a Broad Range of Impurity Ions for Magnetic Fusion Diagnostics

    Energy Technology Data Exchange (ETDEWEB)

    Safronova, Alla [Univ. of Nevada, Reno, NV (United States)

    2014-03-14

    Spectroscopy of radiation emitted by impurities plays an important role in the study of magnetically confined fusion plasmas. The measurements of these impurities are crucial for the control of the general machine conditions, for the monitoring of the impurity levels, and for the detection of various possible fault conditions. Low-Z impurities, typically present in concentrations of 1%, are lithium, beryllium, boron, carbon, and oxygen. Some of the common medium-Z impurities are metals such as iron, nickel, and copper, and high-Z impurities, such as tungsten, are present in smaller concentrations of 0.1% or less. Despite the relatively small concentration numbers, the aforementioned impurities might make a substantial contribution to radiated power, and also influence both plasma conditions and instruments. A detailed theoretical study of line radiation from impurities that covers a very broad spectral range from less than 1 Å to more than 1000 Å has been accomplished and the results were applied to the LLNL Electron Beam Ion Trap (EBIT) and the Sustained Spheromak Physics Experiment (SSPX) and to the National Spherical Torus Experiment (NSTX) at Princeton. Though low- and medium-Z impurities were also studied, the main emphasis was made on the comprehensive theoretical study of radiation from tungsten using different state-of-the-art atomic structure codes such as Relativistic Many-Body Perturbation Theory (RMBPT). The important component of this research was a comparison of the results from the RMBPT code with other codes such as the Multiconfigurational Hartree–Fock developed by Cowan (COWAN code) and the Multiconfiguration Relativistic Hebrew University Lawrence Atomic Code (HULLAC code), and estimation of accuracy of calculations. We also have studied dielectronic recombination, an important recombination process for fusion plasma, for variety of highly and low charged tungsten ions using COWAN and HULLAC codes. Accurate DR rate coefficients are needed for

  11. Untrodden Paths: A Critical Conversation about Wilder Places in Outdoor Education

    Science.gov (United States)

    Straker, Jo; Potter, Tom G.; Irwin, David

    2017-01-01

    This paper asks, what is the outdoors, and challenges conceptions of the role the outdoors play in education. It critically examines why a better understanding of the outdoors is important to outdoor education, how wilder places are essential to education, and how learning generated from these places can be translated into sustainable thinking and…

  12. Public perception of the Antarctic Wilderness: Surveys from an educated, environmentally knowledgeable European community

    Science.gov (United States)

    Tina Tin; Kees Bastmeijer; Jessica O' Reilly; Patrick Maher

    2011-01-01

    In 2007 and 2008, students from Tilburg University (the Netherlands) collected 269 responses on a questionnaire about Antarctica and its management. Respondents in the Netherlands clearly supported protecting Antarctica as a wilderness, and acknowledged Antarctica's importance as part of the global climate system and as a science laboratory for the benefit of...

  13. Future trends in society and technology: implications for wilderness research and management

    Science.gov (United States)

    George H. Stankey

    2000-01-01

    Judging the impact of social and technological trends on the future of wilderness is complex. Declining public trust, growing demands for scrutiny, a need to recognize the link between biophysical and socioeconomic systems, and the need for criteria to select among alternative futures challenge us. A burgeoning global population will increase resource impacts, but more...

  14. Constructing nature as constructing science: expertise, activist science, and public conflict in the Chicago wilderness

    Science.gov (United States)

    Reid M. Helford

    2000-01-01

    In April 1996 an exciting new project was announced, an unprecedented conservation undertaking in one of the nation's most densely populated regions. Chicago Wilderness is a collaborative effort among the more than 90 organizations that make up the Chicago Region Biodiversity Council (CRBC) to protect, restore, and manage the region's natural landscapes...

  15. Professional organisation profile: a faculty of expedition and wilderness medicine for Australasia.

    Science.gov (United States)

    Leggat, Peter A; Shaw, Marc T M

    2012-05-01

    A profile of the recent genesis of the Sub-Faculty of Expedition Medicine into a Faculty of Expedition and Wilderness Medicine of The Australasian College of Tropical Medicine is presented. Information is given on aims, structure, professional grades of membership, and the various activities of the Faculty, including publications and scientific meetings. Copyright © 2012 Elsevier Ltd. All rights reserved.

  16. Understanding the transformative aspects of the Wilderness and Protected Lands experience upon human health

    Science.gov (United States)

    Alan Ewert; Jillisa Overholt; Alison Voight; Chun Chieh Wang

    2011-01-01

    Wilderness and Protected Landscapes (WPLs) have long been considered special areas for a variety of reasons including baseline data, impact analyses, protected zones, and other tangible and intangible values. Another salient, and some would argue, a more important value offered through WPLs is that of human transformation. Accordingly, three theories have provided the...

  17. Wilderness protection in Europe : The role of international, European and national law

    NARCIS (Netherlands)

    Bastmeijer, Kees

    2016-01-01

    In recent years strong concerns have been raised about the protection of the remaining areas of wilderness in Europe. Despite an extensive human footprint, Europe still retains large areas with a high degree of native and free functioning ecosystems, where roads, buildings, bridges, cables and other

  18. A relatively nonrestrictive approach to reducing campsite impact: Caney Creek Wilderness, Arkansas

    Science.gov (United States)

    David N. Cole; Thomas E. Ferguson

    2009-01-01

    An excessive number of highly impacted campsites led managers of the Caney Creek Wilderness to attempt to reduce campsite impacts with a program of trail relocation, education, closure of selected campsites, and site restoration. The strategy involved increasing the concentration of use somewhat, without resorting to the restrictiveness of a designated campsite policy...

  19. Being Alive to the Present: Perceiving Meaning on a Wilderness River Journey

    Science.gov (United States)

    Morse, Marcus

    2015-01-01

    In an earlier paper I identified two key forms of "meaningful experience" for participants on a wilderness river rafting journey, namely a feeling of humility and being alive to the present. However, space considerations led me to describe only the first of these forms in any detail. In this paper I identify and describe the qualities of…

  20. Simulated effects of sulfur deposition on nutrient cycling in class I wilderness areas

    Science.gov (United States)

    Katherine J. Elliott; James M. Vose; Jennifer D. Knoepp; Dale W. Johnson; William T. Swank; William Jackson

    2008-01-01

    As a consequence of human land use, population growth, and industrialization, wilderness and other natural areas can be threatened by air pollution, climate change, and exotic diseases or pests. Air pollution in the form of acidic deposition is comprised of sulfuric and nitric acids and ammonium derived from emissions of sulfur dioxide, nitrogen oxides, and ammonia....

  1. Securing wilderness landscapes in South Africa : Nick Steele, private wildlife conservancies and saving rhinos

    NARCIS (Netherlands)

    Wels,; H.,

    2015-01-01

    Private wildlife conservation is booming business in South Africa! Nick Steele stood at the cradle of this development in the politically turbulent 1970s and 1980s, by stimulating farmers in Natal (now KwaZulu-Natal) to pool resources in order to restore wilderness landscapes, but at the same time

  2. Genome Sequences of Four Subcluster L2 Mycobacterium Phages, Finemlucis, Miley16, Wilder, and Zakai

    OpenAIRE

    Herren, Christopher D.; Peister, Alexandra; Breton, Timothy S.; Hill, Maggie S.; Anderson, Marcy S.; Chang, Adeline W.; Klein, Sydney B.; Thornton, Mackenzie M.; Vars, Stacy J.; Wagner, Kasey E.; Wiebe, Paige L.; Williams, Thomas G.; Yanez, Coraima P.; Ackles, Jasanta M.; Artis, Darius

    2017-01-01

    ABSTRACT Four subcluster L2 mycobacteriophages, Finemlucis, Miley16, Wilder, and Zakai, that infect Mycobacterium smegmatis mc2155 were isolated. The four phages are closely related to each other and code for 12 to 14 tRNAs and 130 to 132 putative protein-coding genes, including tyrosine integrases, cro, immunity repressors, and excise genes involved in the establishment of lysogeny.

  3. Guidelines for measuring the physical, chemical, and biological condition of wilderness ecosystems

    Science.gov (United States)

    Douglas G Fox; J. Christopher Bernabo; Betsy Hood

    1987-01-01

    Guidelines include a large number of specific measures to characterize the existing condition of wilderness resources. Measures involve the atmospheric environment, water chemistry and biology, geology and soils, and flora. Where possible, measures are coordinated with existing long-term monitoring programs. Application of the measures will allow more effective...

  4. Elements of anti-Islam populism : Critiquing Geert Wilders' politics of offense with Marcuse and Adorno

    NARCIS (Netherlands)

    Bot, Michiel

    2017-01-01

    The political performances of Dutch anti-Islam populist Geert Wilders revolve around a combination of giving and taking offense. In this article, I develop a critique of Wilders’ politics of offense by revisiting two classic texts of Frankfurt School critical theory that combine social theory with

  5. Beyond naturalness: Adapting wilderness stewardship to an era of rapid global change

    Science.gov (United States)

    David N. Cole

    2012-01-01

    Climate change and its effects are writ large across wilderness landscapes. They always have been and always will be (see Figure 1). But contemporary change is different. For the first time, the pace and direction of climate change appear to be driven significantly by human activities (IPCC 2007), and this change is playing out across landscapes already affected by...

  6. A qualitative exploration of the wilderness experience as a source of spiritual inspiration

    Science.gov (United States)

    Laura M. Fredrickson; Dorothy H. Anderson

    1999-01-01

    On-site observations, personal field journals, and in-depth interviews were used to examine qualitative aspects of the wilderness experience as a source of spiritual inspiration. Two groups of women kept personal journal accounts of their daily 'lived-experience' during one of two outdoor recreation trips; five participants went to the Boundary Waters Canoe...

  7. Growing pressures on Circumpolar North wilderness: A case for coordinated research and education

    Science.gov (United States)

    Lilian Alessa; Alan Watson

    2002-01-01

    Pressures are growing on undeveloped (wild) places in the Circumpolar North. Among them are economic development, oil and gas exploration and extraction, development of geothermal energy resources, development of heavy industry close to energy sources, and lack of appreciation for “other” orientations toward wilderness resources. An international seminar in Anchorage,...

  8. Traditional ecological knowledge: Applying principles of sustainability to wilderness resource management

    Science.gov (United States)

    Nancy C. Ratner; Davin L. Holen

    2007-01-01

    Traditional ecological knowledge within specific cultural and geographical contexts was explored during an interactive session at the 8th World Wilderness Congress to identify traditional principles of sustainability. Participants analyzed the traditional knowledge contained in ten posters from Canada and Alaska and identified and discussed the traditional principles...

  9. Fire-climate interactions in the Selway-Bitterroot Wilderness area

    Science.gov (United States)

    Kurt F. Kipfmueller; Thomas W. Swetnam

    2000-01-01

    Tree-ring reconstructed summer drought was examined in relation to the occurrence of 15 fires in the Selway-Bitterroot Wilderness Area (SBW). The ten largest fire years between 1880 and 1995 were selected from historical fire atlas data; five additional fire years were selected from a fire history completed in a subalpine forest within the SBW. Results of the analysis...

  10. A DNA metabarcoding study of a primate dietary diversity and plasticity across its entire fragmented range.

    Directory of Open Access Journals (Sweden)

    Erwan Quéméré

    Full Text Available In tropical regions, most primary ecosystems have been replaced by mosaic landscapes in which species must cope with a large shift in the distribution of their habitat and associated food resources. Primates are particularly vulnerable to habitat modifications. Most species persist in small fragments surrounded by complex human-mediated matrices whose structure and connectivity may strongly influence their dispersal and feeding behavior. Behavioral plasticity appears to be a crucial parameter governing the ability of organisms to exploit the resources offered by new matrix habitats and thus to persist in fragmented habitats. In this study, we were interested in the dietary plasticity of the golden-crowned sifaka (Propithecus tattersalli, an endangered species of lemur, found only in the Daraina region in north-eastern Madagascar. We used a DNA-based approach combining the barcoding concept and Illumina next-generation sequencing to (i describe the species diet across its entire range and (ii evaluate the influence of landscape heterogeneity on diet diversity and composition. Faeces from 96 individuals were sampled across the entire species range and their contents were analyzed using the trnL metabarcoding approach. In parallel, we built a large DNA reference database based on a checklist of the plant species of the Daraina region. Our results suggest that golden-crowned sifakas exhibit remarkable dietary diversity with at least 130 plant species belonging to 80 genera and 49 different families. We highlighted an influence of both habitat type and openness on diet composition suggesting a high flexibility of foraging strategies. Moreover, we observed the presence of numerous cultivated and naturalized plants in the faeces of groups living in forest edge areas. Overall, our findings support our initial expectation that P. tattersalli is able to cope with the current level of alteration of the landscape and confirm our previous results on the

  11. Multiscale Framework for Assessing Critical Loads of Atmospheric Nitrogen Deposition for Aquatic Ecosystems in Wilderness Areas of the Western United States

    Science.gov (United States)

    Nanus, Leora; Clow, David; Saros, Jasmine; McMurray, Jill; Blett, Tamara; Sickman, James

    2017-04-01

    High-elevation aquatic ecosystems in Wilderness areas of the western United States are impacted by current and historic atmospheric nitrogen (N) deposition associated with local and regional air pollution. Documented effects include elevated surface water nitrate concentrations, increased algal productivity, and changes in diatom species assemblages. A predictive framework was developed for sensitive high-elevation basins across the western United States at multiple spatial scales including the Rocky Mountain Region (Rockies), the Greater Yellowstone Area (GYA), and Yosemite (YOSE) and Sequoia & Kings Canyon (SEKI) National Parks. Spatial trends in critical loads of N deposition for nutrient enrichment of aquatic ecosystems were quantified and mapped using a geostatistical approach, with modeled N deposition, topography, vegetation, geology, and climate as potential explanatory variables. Multiple predictive models were created using various combinations of explanatory variables; this approach allowed for better quantification of uncertainty and identification of areas most sensitive to high atmospheric N deposition (> 3 kg N ha-1 yr-1). For multiple spatial scales, the lowest critical loads estimates (1.5 + 1 kg N ha-1 yr-1) correspond with areas of high N deposition and vary spatially ranging from less than 20% to over 40% of the study area for the Rockies, GYA, YOSE, and SEKI. These predictive models and maps identify sensitive aquatic ecosystems that may be impacted by excess atmospheric N deposition and can be used to help protect against future anthropogenic disturbance. The approach presented here may be transferable to other remote and protected high-elevation ecosystems at multiple spatial scales that are sensitive to adverse effects of pollutant loading in the US and around the world.

  12. Study on evaluation of normal range of maximum mouth opening among Indian adults using three finger index: A descriptive study

    Directory of Open Access Journals (Sweden)

    Ravleen Nagi

    2017-01-01

    Full Text Available Introduction: Early recognition of decreased or limited mouth opening in many pathological conditions is necessary for prompt diagnosis and to plan the treatment options judiciously. Therefore, it is essential to establish what constitutes normal opening for the population. Aim: This study was designed with an aim to consider the applicability of this method as an index to measure the maximum mouth opening (MMO among different age groups in an Indian population. Materials and Methods: Total 400 healthy participants were studied in the age range of 17 to 60 years and stratified into four groups according to their age ranges. The maximum interincisal distance and width of three fingers (index, middle, and ring fingers at the first distal interphalangeal folds of both right and left hand were measured using Vernier caliper. Statistical analysis was done using SPSS version 21 software package. Results: Results suggested that mean value and range of MMO for males was 51.00 mm (33.0–68.0 mm and for females it was 46.3 mm (39.0–58.0 mm. Mean values of MMO correlated significantly with the width of three fingers of left and right hand as shown by Pearson correlation test. Conclusion: The study suggested that three finger index is a convenient and reliable tool for assessing normal MMO and is a most appropriate method to normal from restricted mouth opening.

  13. Distribution and risk factors for spread of amphibian chytrid fungus Batrachochytrium dendrobatidis in the Tasmanian Wilderness World Heritage Area, Australia.

    Science.gov (United States)

    Pauza, Matthew D; Driessen, Michael M; Skerratt, Lee F

    2010-11-01

    Chytridiomycosis is an emerging infectious disease caused by the pathogen Batrachochytrium dendrobatidis (Bd) and is the cause of the decline and extinction of amphibian species throughout the world. We surveyed the distribution of Bd within and around the Tasmanian Wilderness World Heritage Area (TWWHA), a 1.38 million ha area of significant fauna conservation value, which provides the majority of habitat for Tasmania's 3 endemic frog species (Litoria burrowsae, Bryobatrachus nimbus and Crinia tasmaniensis). Bd was detected at only 1 (3%) of the 33 sites surveyed within the TWWHA and at 15 (52%) of the 29 sites surveyed surrounding the TWWHA. The relatively low incidence of the disease within the TWWHA suggests that the majority of the TWWHA is currently free of the pathogen despite the fact that the region provides what appears to be optimal conditions for the persistence of Bd. For all survey sites within and around the TWWHA, the presence of Bd was strongly associated with the presence of gravel roads, forest and < 1000 m altitude--factors that in this study were associated with human-disturbed landscapes around the TWWHA. Conversely, the presence of walking tracks was strongly associated with the absence of Bd, suggesting an association of absence with relatively remote locations. The wide distribution of Bd in areas of Tasmania with high levels of human disturbance and its very limited occurrence in remote wilderness areas suggests that anthropogenic activities may facilitate the dissemination of the pathogen on a landscape scale in Tasmania. Because the majority of the TWWHA is not readily accessible and appears to be largely free of Bd, and because Tasmanian frogs reproduce in ponds rather than streams, it may be feasible to control the spread of the disease in the TWWHA.

  14. Does inter-vertebral range of motion increase after spinal manipulation? A prospective cohort study.

    Science.gov (United States)

    Branney, Jonathan; Breen, Alan C

    2014-01-01

    Spinal manipulation for nonspecific neck pain is thought to work in part by improving inter-vertebral range of motion (IV-RoM), but it is difficult to measure this or determine whether it is related to clinical outcomes. This study undertook to determine whether cervical spine flexion and extension IV-RoM increases after a course of spinal manipulation, to explore relationships between any IV-RoM increases and clinical outcomes and to compare palpation with objective measurement in the detection of hypo-mobile segments. Thirty patients with nonspecific neck pain and 30 healthy controls matched for age and gender received quantitative fluoroscopy (QF) screenings to measure flexion and extension IV-RoM (C1-C6) at baseline and 4-week follow-up between September 2012-13. Patients received up to 12 neck manipulations and completed NRS, NDI and Euroqol 5D-5L at baseline, plus PGIC and satisfaction questionnaires at follow-up. IV-RoM accuracy, repeatability and hypo-mobility cut-offs were determined. Minimal detectable changes (MDC) over 4 weeks were calculated from controls. Patients and control IV-RoMs were compared at baseline as well as changes in patients over 4 weeks. Correlations between outcomes and the number of manipulations received and the agreement (Kappa) between palpated and QF-detected of hypo-mobile segments were calculated. QF had high accuracy (worst RMS error 0.5o) and repeatability (highest SEM 1.1o, lowest ICC 0.90) for IV-RoM measurement. Hypo-mobility cut offs ranged from 0.8o to 3.5o. No outcome was significantly correlated with increased IV-RoM above MDC and there was no significant difference between the number of hypo-mobile segments in patients and controls at baseline or significant increases in IV-RoMs in patients. However, there was a modest and significant correlation between the number of manipulations received and the number of levels and directions whose IV-RoM increased beyond MDC (Rho=0.39, p=0.043). There was also no agreement

  15. Paleoseismic study of the Cathedral Rapids fault in the northern Alaska Range near Tok, Alaska

    Science.gov (United States)

    Koehler, R. D.; Farrell, R.; Carver, G. A.

    2010-12-01

    The Cathedral Rapids fault extends ~40 km between the Tok and Robertson River valleys and is the easternmost fault in a series of active south-dipping imbricate thrust faults which bound the northern flank of the Alaska Range. Collectively, these faults accommodate a component of convergence transferred north of the Denali fault and related to the westward (counterclockwise) rotation of the Wrangell Block driven by relative Pacific/North American plate motion along the eastern Aleutian subduction zone and Fairweather fault system. To the west, the system has been defined as the Northern Foothills Fold and Thrust Belt (NFFTB), a 50-km-wide zone of east-west trending thrust faults that displace Quaternary deposits and have accommodated ~3 mm/yr of shortening since latest Pliocene time (Bemis, 2004). Over the last several years, the eastward extension of the NFFTB between Delta Junction and the Canadian border has been studied by the Alaska Division of Geological & Geophysical Surveys to better characterize faults that may affect engineering design of the proposed Alaska-Canada natural gas pipeline and other infrastructure. We summarize herein reconnaissance field observations along the western part of the Cathedral Rapids fault. The western part of the Cathedral Rapids fault extends 21 km from Sheep Creek to Moon Lake and is characterized by three roughly parallel sinuous traces that offset glacial deposits of the Illinoian to early Wisconsinan Delta glaciations and the late Wisconsinan Donnelly glaciation, as well as, Holocene alluvial deposits. The northern trace of the fault is characterized by an oversteepened, beveled, ~2.5-m-high scarp that obliquely cuts a Holocene alluvial fan and projects into the rangefront. Previous paleoseismic studies along the eastern part of the Cathedral Rapids fault and Dot “T” Johnson fault indicate multiple latest Pleistocene and Holocene earthquakes associated with anticlinal folding and thrust faulting (Carver et al., 2010

  16. Progress with Long-Range Beam-Beam Compensation Studies for High Luminosity LHC

    Energy Technology Data Exchange (ETDEWEB)

    Rossi, Adriana; et al.

    2017-05-01

    Long-range beam-beam (LRBB) interactions can be a source of emittance growth and beam losses in the LHC during physics and will become even more relevant with the smaller '* and higher bunch intensities foreseen for the High Luminosity LHC upgrade (HL-LHC), in particular if operated without crab cavities. Both beam losses and emittance growth could be mitigated by compensat-ing the non-linear LRBB kick with a correctly placed current carrying wire. Such a compensation scheme is currently being studied in the LHC through a demonstration test using current-bearing wires embedded into col-limator jaws, installed either side of the high luminosity interaction regions. For HL-LHC two options are considered, a current-bearing wire as for the demonstrator, or electron lenses, as the ideal distance between the particle beam and compensating current may be too small to allow the use of solid materials. This paper reports on the ongoing activities for both options, covering the progress of the wire-in-jaw collimators, the foreseen LRBB experiments at the LHC, and first considerations for the design of the electron lenses to ultimately replace material wires for HL-LHC.

  17. Intensive vs. free-range organic beef. A preference study through consumer liking and conjoint analysis.

    Science.gov (United States)

    García-Torres, S; López-Gajardo, A; Mesías, F J

    2016-04-01

    This paper evaluates consumer liking and preferences towards organic beef from two production systems allowed by EU regulation: i) free-range and ii) intensive (fattened in feed-lot with organic feedstuff) as compared with conventionally produced beef. Data were obtained in April-May 2014 with a sample of 150 regular beef consumers who completed two tasks: firstly a sensory test where consumers tasted and rated the meats and secondly a conjoint analysis to study beef purchasing preferences. Willingness-to-pay for the different meats was also calculated from conjoint results. Results show that consumers preferred organic-from-concentrate beef at sensory level while organic beef from animals fed on grass was preferred when process characteristics (i.e. farming system) or attributes perceived at the point of purchase (i.e. colour) were evaluated. It was also found that the price-premium for organic beef is over 40%, with organic-fed-on grass beef preferred slightly over that fed-on-concentrate. Copyright © 2015 Elsevier Ltd. All rights reserved.

  18. Grazing studies on a plutonium-contaminated range of the Nevada Test Site

    International Nuclear Information System (INIS)

    Smith, D.D.; Barth, J.; Patzer, R.G.

    1976-01-01

    A grazing study on a plutonium-contaminated range on the Nevada Test Site was initiated in May 1973 and is continuing. The primary objective of this study is to determine the uptake and tissue distribution of the plutonium by ruminants. Other objectives are to evaluate maternal-foetal transfer, to determine uptake and distribution differences in young versus mature animals, and to compare these data with those collected from other contaminated areas. Steers with surgically prepared rumen fistulas served as biological samplers to determine grazing habits (quantity and type of forage ingested) as a function of seasonal plant availability and preference, to estimate intake of actinides over specified periods of time, and to determine the actinide ratios within the ingesta. Since the study began tissue samples have been collected from seven cows, four calves, and three foetusses. All animals sacrificed were necropsied and selected tissue and organ samples collected for histo-pathological examination and actinide analyses. No significant lesions have been found and actinide accumulations in the tissues have been relatively minimal. Using activity levels found in the rumen contents of fistulated steers, it was estimated that a study cow ingested 100μCi prior to sacrifice. Of this, 16.4μCi was in rumen fluids from which a combined retention factor of 0.0034% was calculated for the bone, muscle and liver. Comparisons of 239 Pu/ 238 Pu ratios in ingesta and tissues indicate that the 238 Pu is more readily absorbed and retained. Analysis of ingesta from the fistulated steers indicates that grasses are preferred in the late spring and early summer months, with shrubs making up the bulk of the diet the rest of the year. Plutonium acitivity in rumen contents was higher when Eurotia lanata was the preferred shrub species. Studies on labelled particles indicate that ingested particles from 75 to 500μm in size have a half-time of 3.5 to 5 days in the intestinal tract, while

  19. First in situ TOF-PET study using digital photon counters for proton range verification.

    Science.gov (United States)

    Cambraia Lopes, P; Bauer, J; Salomon, A; Rinaldi, I; Tabacchini, V; Tessonnier, T; Crespo, P; Parodi, K; Schaart, D R

    2016-08-21

    Positron emission tomography (PET) is the imaging modality most extensively tested for treatment monitoring in particle therapy. Optimal use of PET in proton therapy requires in situ acquisition of the relatively strong (15)O signal due to its relatively short half-life (~2 min) and high oxygen content in biological tissues, enabling shorter scans that are less sensitive to biological washout. This paper presents the first performance tests of a scaled-down in situ time-of-flight (TOF) PET system based on digital photon counters (DPCs) coupled to Cerium-doped Lutetium Yttrium Silicate (LYSO:Ce) crystals, providing quantitative results representative of a dual-head tomograph that complies with spatial constraints typically encountered in clinical practice (2  ×  50°, of 360°, transaxial angular acceptance). The proton-induced activity inside polymethylmethacrylate (PMMA) and polyethylene (PE) phantoms was acquired within beam pauses (in-beam) and immediately after irradiation by an actively-delivered synchrotron pencil-beam, with clinically relevant 125.67 MeV/u, 4.6  ×  10(8) protons s(-1), and 10(10) total protons. 3D activity maps reconstructed with and without TOF information are compared to FLUKA simulations, demonstrating the benefit of TOF-PET to reduce limited-angle artefacts using a 382 ps full width at half maximum coincidence resolving time. The time-dependent contributions from different radionuclides to the total count-rate are investigated. We furthermore study the impact of the acquisition time window on the laterally integrated activity depth-profiles, with emphasis on 2 min acquisitions starting at different time points. The results depend on phantom composition and reflect the differences in relative contributions from the radionuclides originating from carbon and oxygen. We observe very good agreement between the shapes of the simulated and measured activity depth-profiles for post-beam protocols. However, our results

  20. Dynamic range studies of the RCA streak tube in the LLL streak camera

    International Nuclear Information System (INIS)

    Thomas, S.W.; Phillips, G.E.

    1979-01-01

    As indicated by tests on several cameras, the dynamic range of the Lawrence Livermore Laboratory streak-camera system appears to be about two orders of magnitude greater than those reported for other systems for 10- to 200-ps pulses. The lack of a fine mesh grid in the RCA streak tube used in these cameras probably contributes to a lower system dynamic noise and therefore raises the dynamic range. A developmental tube with a mesh grid was tested and supports this conjecture. Order-of-magnitude variations in input slit width do not affect the spot size on the phosphor or the dynamic range of the RCA tube. (author)

  1. How are rescaled range analyses affected by different memory and distributional properties? A Monte Carlo study

    Czech Academy of Sciences Publication Activity Database

    Krištoufek, Ladislav

    2012-01-01

    Roč. 391, č. 17 (2012), s. 4252-4260 ISSN 0378-4371 R&D Projects: GA ČR GA402/09/0965 Grant - others:GA UK(CZ) 118310; SVV(CZ) 261 501 Institutional support: RVO:67985556 Keywords : Rescaled range analysis * Modified rescaled range analysis * Hurst exponent * Long - term memory * Short- term memory Subject RIV: AH - Economics Impact factor: 1.676, year: 2012 http://library.utia.cas.cz/separaty/2012/E/kristoufek-how are rescaled range analyses affected by different memory and distributional properties.pdf

  2. Thrombolysis using multi-frequency high intensity focused ultrasound at MHz range: an in vitro study

    International Nuclear Information System (INIS)

    Suo, Dingjie; Guo, Sijia; Jiang, Xiaoning; Jing, Yun; Lin, Weili

    2015-01-01

    High intensity focused ultrasound (HIFU) based thrombolysis has emerged as a promising drug-free treatment approach for ischemic stroke. The large amount of acoustic power required by this approach, however, poses a critical challenge to the future clinical translation. In this study, multi-frequency acoustic waves at MHz range (near 1.5 MHz) were introduced as HIFU excitations to reduce the required power for treatment as well as the treatment time. In vitro bovine blood clots weighing around 150 mg were treated by single-frequency and multi-frequency HIFU. The pulse length was 2 ms for all experiments except the ones where the duty cycle was changed. It was found that dual-frequency thrombolysis efficiency was statistically better than single-frequency under the same acoustic power and excitation condition. When varying the acoustic power but fixing the duty cycle at 5%, it was found that dual-frequency ultrasound can save almost 30% power in order to achieve the same thrombolysis efficiency. In the experiment where the duty cycle was increased from 0.5% to 10%, it was shown that dual-frequency ultrasound can achieve the same thrombolysis efficiency with only half of the duty cycle of single-frequency. Dual-frequency ultrasound could also accelerate the thrombolysis by a factor of 2–4 as demonstrated in this study. No significant differences were found between dual-frequencies with different frequency differences (0.025, 0.05, and 0.1 MHz) and between dual-frequency and triple-frequency. The measured cavitation doses of dual-frequency and triple-frequency excitations were at about the same level but both were significantly higher than that of single-frequency. (paper)

  3. Study of uranium mineralization in rock samples from marwat range bannu basin by fission track analysis technique

    International Nuclear Information System (INIS)

    Qureshi, A.Z.; Ullah, K.; Ullah, N.; Akram, M.

    2004-07-01

    The Geophysics Division, Atomic Energy Minerals Centre (AEMC), Lahore has planned a uranium exploration program in Marwat Range, Bannu Basin. In this connection 30 thin sections of rock samples, collected from four areas; namely, Darra Tang, Simukili, Karkanwal and Sheikhillah from Marwat Range, and one from Salt Range were provided to Nuclear Geology Group of Physics Research Division, PINSTECH for the study of nature and mechanism of uranium mineralization These studies are aimed to help in designing uranium exploration strategy by providing the loci of uranium sources in the Marwat and Salt Ranges. The samples have been studied using fission track analysis technique. (author)

  4. Linking home ranges to protected area size: The case study of the Mediterranean Sea

    DEFF Research Database (Denmark)

    Di Franco, Antonio; Plass-Johnson, Jeremiah Grahm; Di Lorenzo, Manfredi

    2018-01-01

    in the Mediterranean Sea, and related this to the size of 184 Mediterranean fully protected areas. We also investigated the influence of fully protected areas size on fish density in contrast to fished areas with respect to home ranges. Home range estimations were available for 11 species (10 fishes and 1 lobster......). The European spiny lobster Palinurus elephas had the smallest home range (0.0039 ± 0.0014 km2; mean ± 1 SE), while the painted comber Serranus scriba (1.1075 ± 0.2040 km2) had the largest. Approximately 25% of Mediterranean fully protected areas are larger than 2 times the size of the largest home range...

  5. Modeled Oil and Gas Atmospheric Impacts in National Parks and Wilderness Areas in the Western US

    Science.gov (United States)

    Thompson, T. M.; Barna, M. G.; Schichtel, B. A.; Vimont, J.; Moore, C. T.

    2014-12-01

    Oil and gas production in the Western United States has increased considerably over the past 10 years. While many of the still limited oil and gas impact assessments have focused on potential human health impacts, the typically remote locations of production in the Intermountain West suggests that the impacts of oil and gas production on national parks and wilderness areas (class 1&2 areas) could also be important. To evaluate this, we utilize the Comprehensive Air quality Model with Extensions (CAMx) with two year-long modeling episodes representing 2008 and 2011, meteorology and emissions. The model inputs for the 2008 and 2011 episodes were generated as part of the West-wide Jump-start Air Quality Modeling Study (WestJumpAQMS) and Three State Air Quality Study (3SAQS) respectively. Both studies included a detailed assessment of oil and gas (O&G) emissions in Western States for the respective years. Each year-long modeling episode was run both with and without emissions from O&G production. The difference between these two runs provides an estimate of the contribution of the O&G production to air quality. These data were used to assess the contribution of O&G to the 8 hour average ozone concentrations, daily and annual fine particulate concentrations, annual nitrogen deposition totals and visibility in the modeling domain. We present the results for the class 1&2 areas in the Western US. We also present temporal trends of O&G impacts, differentiating between trends in urban and rural areas.

  6. The Symbiotic Relationship Between Operational Military Medicine, Tactical Medicine, and Wilderness Medicine: A View Through a Personal Lens.

    Science.gov (United States)

    Llewellyn, Craig H

    2017-06-01

    There are direct and indirect linkages and a form of symbiosis between operational military medicine from World War II and present wilderness medicine, from the beginnings to contemporary practice, and the more recently evolved field of tactical emergency medical support. Each of these relationships will be explored from the historical perspective of the Department of Military & Emergency Medicine, Uniformed Services University of the Health Sciences from 1982 to the present. Copyright © 2017 Wilderness Medical Society. Published by Elsevier Inc. All rights reserved.

  7. Reference ranges for uterine artery pulsatility index during the menstrual cycle: a cross-sectional study.

    Directory of Open Access Journals (Sweden)

    Luís Guedes-Martins

    Full Text Available Cyclic endometrial neoangiogenesis contributes to changes in local vascular patterns and is amenable to non-invasive assessment with Doppler sonography. We hypothesize that the uterine artery (UtA impedance, measured by its pulsatility index (PI, exhibits a regular pattern during the normal menstrual cycle. Therefore, the main study objective was to derive normative new day-cycle-based reference ranges for the UtA-PI during the entire cycle from days 1 to 34 according to the isolated time effect and potential confounders such as age and parity.From January 2009 to December 2012, a cross-sectional study of 1,821 healthy women undergoing routine gynaecological ultrasound was performed. The Doppler flow of the right and left UtA-PI was studied transvaginally by colour and pulsed Doppler imaging. The mean right and left values and the presence or absence of a bilateral protodiastolic notch were recorded. Reference intervals for the PI according to the cycle day were generated by classical linear regression.The majority of patients (97.5% presented unilateral or bilateral UtA notches. The crude 5th, 50th, and 95th reference percentile curves of the UtA-PI at 1-34 days of the normal menstrual cycle were derived. In all curves, a progressive significant decrease occurred during the first 13 days, followed by an increase and recovery in the UtA-PI. The adjusted 5th, 50th, and 95th reference percentile curves for the effects of age and parity were also obtained. These two conditions generated an approximately identical UtA-PI pattern during the cycle, except with small but significant reductions at the temporal extremes.The median, 5th, and the 95th percentiles of the UtA-PI decrease during the first third of the menstrual cycle and recover to their initial values during the last two thirds of the cycle. The rates of decrease and recovery depend significantly on age and parity.

  8. Validity and reliability of using photography for measuring knee range of motion: a methodological study

    Directory of Open Access Journals (Sweden)

    Adie Sam

    2011-04-01

    Full Text Available Abstract Background The clinimetric properties of knee goniometry are essential to appreciate in light of its extensive use in the orthopaedic and rehabilitative communities. Intra-observer reliability is thought to be satisfactory, but the validity and inter-rater reliability of knee goniometry often demonstrate unacceptable levels of variation. This study tests the validity and reliability of measuring knee range of motion using goniometry and photographic records. Methods Design: Methodology study assessing the validity and reliability of one method ('Marker Method' which uses a skin marker over the greater trochanter and another method ('Line of Femur Method' which requires estimation of the line of femur. Setting: Radiology and orthopaedic departments of two teaching hospitals. Participants: 31 volunteers (13 arthritic and 18 healthy subjects. Knee range of motion was measured radiographically and photographically using a goniometer. Three assessors were assessed for reliability and validity. Main outcomes: Agreement between methods and within raters was assessed using concordance correlation coefficient (CCCs. Agreement between raters was assessed using intra-class correlation coefficients (ICCs. 95% limits of agreement for the mean difference for all paired comparisons were computed. Results Validity (referenced to radiographs: Each method for all 3 raters yielded very high CCCs for flexion (0.975 to 0.988, and moderate to substantial CCCs for extension angles (0.478 to 0.678. The mean differences and 95% limits of agreement were narrower for flexion than they were for extension. Intra-rater reliability: For flexion and extension, very high CCCs were attained for all 3 raters for both methods with slightly greater CCCs seen for flexion (CCCs varied from 0.981 to 0.998. Inter-rater reliability: For both methods, very high ICCs (min to max: 0.891 to 0.995 were obtained for flexion and extension. Slightly higher coefficients were obtained

  9. At Home in the Great Northern Wilderness: African Americans and Freedom’s Ecology in the Adirondacks, 1846-1859

    Directory of Open Access Journals (Sweden)

    Daegan Miller

    2013-05-01

    Full Text Available In the fall of 1846, the first of 3,000 African American settlers set foot on their 40-acre plots in the Great Northern Wilderness of New York State, a place we now call the “forever wild” wilderness of the Adirondack State Park. These black settlers were the initial wave of a social experiment meant to destroy both slavery and, more generally, racism throughout the entire United States through the redemptive practice of a utopian agrarianism. The settlers understood that nature and culture, wilderness and society, were thickly, dialectically intertwined. And they weren’t alone: their efforts were seeded by the white abolitionist, Gerrit Smith; fertilized by the utopian socialist communes that covered the Northeast in the 1840s; and nurtured by abolitionists, both black and white. To United States environmental history, I add two threads less frequently seen: African American history and an intellectual history of radical politics. Following these threads has led me beyond the disciplinary confines of history and into larger debates about the cultural politics of wilderness. In this article I argue that the critical wilderness paradigm currently reigning both in and beyond historical scholarship has obscured nuanced, sometimes radical visions of the natural world. Instead of an ironic, deconstructed notion of a troubling wilderness, I suggest another heuristic, the ecology of freedom, which highlights past contingency and hope, and can furthermore help guide our present efforts, both scholastic and activist, to find an honorable, just way of living on the earth.

  10. Long-range airplane study: The consumer looks at SST travel

    Science.gov (United States)

    Landes, K. H.; Matter, J. A.

    1980-01-01

    The attitudes of long-range air travelers toward several basic air travel decisions, were surveyed. Of interest were tradeoffs involving time versus comfort and time versus cost as they pertain to supersonic versus conventional wide-body aircraft on overseas routes. The market focused upon was the segment of air travelers most likely to make that type of tradeoff decision: those having flown overseas routes for business or personal reasons in the recent past. The information generated is intended to provide quantifiable insight into consumer demand for supersonic as compared to wide-body aircraft alternatives for long-range overseas air travel.

  11. An experimental study of UWB device-free person detection and ranging

    NARCIS (Netherlands)

    Kilic, Y.; Wymeersch, Henk; Meijerink, Arjan; Bentum, Marinus Jan; Scanlon, W.G.

    2013-01-01

    Passive person detection and localization is an emerging area in UWB localization systems, whereby people are not required to carry any UWB ranging device. Based on experimental data, we propose a novel method to detect static persons in the absence of template waveforms, and to compute distances to

  12. Functional framework and hardware platform for dependability study in short range wireless embedded systems

    NARCIS (Netherlands)

    Senouci, B.; Annema, Anne J.; Bentum, Marinus Jan; Kerkhoff, Hans G.

    2011-01-01

    A new direction in short-range wireless applications has appeared in the form of high-speed data communication devices for distances of a few meters. Behind these embedded applications, a complex Hardware/Software architecture is built. Dependability is one of the major challenges in these systems.

  13. Theoretical study of cylindrical energy analyzers for MeV range heavy ion beam probes

    International Nuclear Information System (INIS)

    Fujisawa, A.; Hamada, Y.

    1993-07-01

    A cylindrical energy analyzer with drift spaces is shown to have a second order focusing for beam incident angle when the deflection angle is properly chosen. The analyzer has a possibility to be applied to MeV range heavy ion beam probes, and will be also available for accurate particle energy measurements in many other fields. (author)

  14. Neutron diffraction study on the medium and short-range order of ternary chalcogenide glasses

    Czech Academy of Sciences Publication Activity Database

    Neov, S.; Gerasimova, I.; Skordeva, E.; Arsova, D.; Pamukchieva, V.; Mikula, Pavol; Lukáš, Petr; Sonntag, R.

    1999-01-01

    Roč. 34, - (1999), s. 3669-3676 ISSN 0022-2461 R&D Projects: GA ČR GV202/97/K038 Keywords : neutron diffraction * short-range order * chalcogenide glasses Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.786, year: 1999

  15. Anomalous X-ray scattering studies of short-, intermediate- and extended-range order in glasses

    International Nuclear Information System (INIS)

    Price, D.L.; Saboungi, M.L.; Armand, P.; Cox, D.E.

    1998-01-01

    The authors present the formalism of anomalous x-ray scattering as applied to partial structure analysis of disordered materials, and give an example of how the technique has been applied, together with that of neutron diffraction, to investigate short-, intermediate- and extended-range order in vitreous germania and rubidium germanate

  16. A case study of contaminants on military ranges: Camp Edwards, Massachusetts, USA

    International Nuclear Information System (INIS)

    Clausen, Jay; Robb, Joe; Curry, Diane; Korte, Nic

    2004-01-01

    An extensive investigation at the Camp Edwards, Massachusetts Military Reservation (MMR) demonstrates that assessment of groundwater and soil contamination at military ranges can be limited primarily to explosive-related compounds such as RDX, HMX, perchlorate, TNT and their transformation products. A modified analytical method is recommended to expand the list of explosives and to improve the detection limits. Analyses of metals, VOCs, SVOCs, and TICs are unnecessary. Soil samples may require the analyses of PAHs and PCNs for burn areas. Camp Edwards, as one of the few military ranges that have been exhaustively investigated for contaminants, is an ideal point of departure for evaluating other ranges. The permeable site soils promote leaching of contaminants and inhibit biotic and abiotic transformations. Moreover, the site has experienced an unusual extent of activities in its more than ninety years of active use. The recommendations in this report are based on data obtained for more than 200 analytes from more than 15,000 environmental samples. - Assessment of groundwater and soil contamination at US military ranges can be limited primarily to explosive-related compounds

  17. Co-occurrence of linguistic and biological diversity in biodiversity hotspots and high biodiversity wilderness areas.

    Science.gov (United States)

    Gorenflo, L J; Romaine, Suzanne; Mittermeier, Russell A; Walker-Painemilla, Kristen

    2012-05-22

    As the world grows less biologically diverse, it is becoming less linguistically and culturally diverse as well. Biologists estimate annual loss of species at 1,000 times or more greater than historic rates, and linguists predict that 50-90% of the world's languages will disappear by the end of this century. Prior studies indicate similarities in the geographic arrangement of biological and linguistic diversity, although conclusions have often been constrained by use of data with limited spatial precision. Here we use greatly improved datasets to explore the co-occurrence of linguistic and biological diversity in regions containing many of the Earth's remaining species: biodiversity hotspots and high biodiversity wilderness areas. Results indicate that these regions often contain considerable linguistic diversity, accounting for 70% of all languages on Earth. Moreover, the languages involved are frequently unique (endemic) to particular regions, with many facing extinction. Likely reasons for co-occurrence of linguistic and biological diversity are complex and appear to vary among localities, although strong geographic concordance between biological and linguistic diversity in many areas argues for some form of functional connection. Languages in high biodiversity regions also often co-occur with one or more specific conservation priorities, here defined as endangered species and protected areas, marking particular localities important for maintaining both forms of diversity. The results reported in this article provide a starting point for focused research exploring the relationship between biological and linguistic-cultural diversity, and for developing integrated strategies designed to conserve species and languages in regions rich in both.

  18. Study of microbiological, physico-chemical and biochemical a fourth range salad irradiated for people immunosuppressed

    International Nuclear Information System (INIS)

    Ayadi, Nadia

    2013-01-01

    We are interested in this work to immunocompromised patients in the National Transplant Center Bone Marrow of Tunis, that's why a raw salad IV range was irradiated and chosen as auxiliary dish. Following a series of microbiological analysis carried out on samples treated with different doses : 0 (control) , 1, 2 , 3, 3.5 and 4 kGy. 4 kGy dose was the most suitable for this type of dish ensuring good bacterial quality below the limits prescribed by the International Atomic Energy Agency (IAEA) for 9 days of refrigerated storage. The physico-chemical and biochemical parameters showed no significant effect on the gamma radiation on nutrients such as proteins , trace elements and vitamin E. The raw salads IV range perfectly packaged and irradiated can be a good way to stimulate the immune system in immunocompromised patients and improve their health.

  19. Clever mothers balance time and effort in parental care: a study on free-ranging dogs

    OpenAIRE

    Paul, Manabi; Sau, Shubhra; Nandi, Anjan K.; Bhadra, Anindita

    2016-01-01

    Mammalian offspring require parental care, at least in the form of suckling during their early development. While mothers need to invest considerable time and energy in ensuring the survival of their current offspring, they also need to optimize their investment in one batch of offspring in order to ensure future reproduction and hence lifetime reproductive success. Free-ranging dogs live in small social groups, mate promiscuously, and lack the cooperative breeding biology of other group livi...

  20. A serial 4DCT study to quantify range variations in charged particle radiotherapy of thoracic cancers

    International Nuclear Information System (INIS)

    Mori, Shinichiro; Dong, Lei; Starkschall, George; Mohan, Radhe; Chen, George T.Y.

    2014-01-01

    Weekly serial 4DCT scans were acquired under free breathing conditions to assess water-equivalent path length (WEL) variations due to both intrafractional and interfractional changes in tissue thickness and density and to calculate proton dose distributions resulting from anatomical variations observed in serial 4DCT. A template of region of interests (ROIs) was defined on the anterior-posterior (AP) beam's eye view, and WEL measurements were made over these ROIs to quantify chest wall thickness variations. Interfractional proton dose distributions were calculated to assess changes in the expected dose distributions caused by range variations. Mean intrafractional chest wall WEL changes during respiration varied by: -4.1 mm (<-10.2 mm), -3.6 mm (<-7.1 mm), -3.2 mm (<-5.6 mm) and -2.5 mm (<-5.1 mm) during respiration in the ITV, upper, middle and lower lung regions, respectively. The mean interfractional chest wall WEL variation at Week 6 decreased by -4.0 mm (<-8.6 mm), -9.1 mm (<-17.9 mm), -9.4 mm (<-25.3 mm) and -4.5 mm (<-15.6 mm) in the ITV, upper, middle and lower lung regions, respectively. The variations were decomposed into anterior and posterior chest wall thickness changes. Dose overshoot beyond the target was observed when the initial boli was applied throughout the treatment course. This overshoot is due to chest wall thickness variations and target positional variations. The radiological path length can vary significantly during respiration as well as over the course of several weeks of charged particle therapy. Intrafractional/interfractional chest wall thickness changes can be a significant source of range variation in treatment of lung tumors with charged particle beams, resulting in dose distribution perturbations from the initial plan. Consideration of these range variations should be made in choosing the therapeutic charged particle beam range. (author)

  1. Studies for determining the optimum propulsion system characteristics for use in a long range transport aircraft

    Science.gov (United States)

    Brines, G. L.

    1972-01-01

    A comprehensive evaluation of propulsion systems for the next generation of near-sonic long range transport aircraft indicates that socially responsive noise and emission goals can be achieved within the probable limits of acceptable airplane performance and economics. Technology advances needed in the 1975-1985 time period to support the development of these propulsion systems are identified and discussed. The single most significant result is the low noise, high performance potential of a low tip speed, spaced, two-stage fan.

  2. Structural study of liquids with strong short-range correlation in the atomic distribution

    International Nuclear Information System (INIS)

    Uzuki, Kenji

    1976-01-01

    Structure factors of liquids and amorphous solids having a relatively high degree of ordering in their short-range structures have been measured over a wide range of scattering vectors by means of the T-O-F neutron diffraction using epithermal pulsed neutrons generated by an electron linear accelerator. It has been shown in the case of liquid CS 2 that the size and shape of a molecule existing in the liquid phase are determined from the behaviour of the structure factor in the range of high scattering vectors, and that the structure factor in the region of low scattering vectors informs on inter-molecular orientational and center-center correlations in the liquid state. Moreover, based on highly resoluted radial distribution functions, a free rotating chain model has been discussed for chain molecules contained in liquid Se, and a splitting of the nearest neighbour Pd-Pd and Pd-Si correlation has been clearly found in the amorphous Pdsub(0.8) - Sisub(0.2) alloy. (orig./HK) [de

  3. Quantifying species' range shifts in relation to climate change: a case study of Abies spp. in China.

    Directory of Open Access Journals (Sweden)

    Xiaojun Kou

    Full Text Available Predicting species range shifts in response to climatic change is a central aspect of global change studies. An ever growing number of species have been modeled using a variety of species distribution models (SDMs. However, quantitative studies of the characteristics of range shifts are rare, predictions of range changes are hard to interpret, analyze and summarize, and comparisons between the various models are difficult to make when the number of species modeled is large. Maxent was used to model the distribution of 12 Abies spp. in China under current and possible future climate conditions. Two fuzzy set defined indices, range increment index (I and range overlapping index (O, were used to quantify range shifts of the chosen species. Correlation analyses were used to test the relationships between these indices and species distribution characteristics. Our results show that Abies spp. range increments (I were highly correlated with longitude, latitude, and mean roughness of their current distributions. Species overlapping (O was moderately, or not, correlated with these parameters. Neither range increments nor overlapping showed any correlation with species prevalence. These fuzzy sets defined indices provide ideal measures of species range shifts because they are stable and threshold-free. They are reliable indices that allow large numbers of species to be described, modeled, and compared on a variety of taxonomic levels.

  4. Review of some experimental studies of turbulent mixed convection covering a wide range Prandtl number

    International Nuclear Information System (INIS)

    Jackson, J.D.

    2011-01-01

    The early experimental studies of buoyancy-influenced turbulent convective heat transfer to fluids flowing upwards and downwards in long uniformly heated vertical tubes were mainly performed using water at atmospheric pressure as the working fluid. In addition, some experiments using air were reported and even some using mercury. At that time there was also quite a lot of interest in heat transfer to water at supercritical pressure and also carbon dioxide. More recently, experimental results have been obtained using liquid sodium. The Prandtl numbers in the studies referred to above cover a wide range of values, being well in excess of unity under some conditions in the case of the supercritical pressure fluids and atmospheric pressure water, just under unity in the case of air, much less than unity in the case of mercury and even lower in the case of liquid sodium. Over the years a good general understanding has gradually been achieved of the complex manner in which buoyancy affects heat transfer in conventional fluids such as water and air. Up to a point, the behaviour in the case of a liquid metal such as mercury can be reconciled with such arguments. However, this is certainly not so in the case of liquid sodium. In the present paper results from a number of experimental studies of buoyancy-influenced heat transfer in vertical tubes are reviewed. This is done with the aim of providing a picture of observed behaviour consistent with our understanding of the basic mechanisms of convective heat transfer, taking account of the complicated manner in which the mean motion, turbulence and the heat transfer are affected by buoyancy. The starting point is to view convective heat transfer in wall shear flows in terms of the local balance between diffusion of heat (turbulent and molecular) and advection of heat by the flowing fluid. Prandtl number affects the radial temperature profile and therefore the variation of density across the shear flow and, in turn, the extent

  5. Long-range and head-on beam-beam compensation studies in RHIC with lessons for the LHC

    International Nuclear Information System (INIS)

    Fischer, W.; Luo, Y.; Abreu, N.; Calaga, R.; Montag, C.; Robert-Demolaize, G.; Dorda, U.; Koutchouk, J.-P.; Sterbini, G.; Zimmermann, F.; Kim, H.-J.; Sen, T.; Shiltsev, V.; Valishev, A.; Qiang, J.; Kabel, A.

    2009-01-01

    Long-range as well as head-on beam-beam effects are expected to limit the LHC performance with design parameters. They are also important consideration for the LHC upgrades. To mitigate long-range effects, current carrying wires parallel to the beam were proposed. Two such wires are installed in RHIC where they allow studying the effect of strong long-range beam-beam effects, as well as the compensation of a single long-range interaction. The tests provide benchmark data for simulations and analytical treatments. Electron lenses were proposed for both RHIC and the LHC to reduce the head-on beam-beam effect. We present the experimental long-range beam-beam program at RHIC and report on head-on compensations studies based on simulations

  6. Age- and size-related reference ranges: a case study of spirometry through childhood and adulthood.

    Science.gov (United States)

    Cole, T J; Stanojevic, S; Stocks, J; Coates, A L; Hankinson, J L; Wade, A M

    2009-02-28

    Age-related reference ranges are useful for assessing growth in children. The LMS method is a popular technique for constructing growth charts that model the age-changing distribution of the measurement in terms of the median, coefficient of variation and skewness. Here the methodology is extended to references that depend on body size as well as age, by exploiting the flexibility of the generalised additive models for location, scale and shape (GAMLSS) technique. GAMLSS offers general linear predictors for each moment parameter and a choice of error distributions, which can handle kurtosis as well as skewness. A key question with such references is the nature of the age-size adjustment, additive or multiplicative, which is explored by comparing the identity link and log link for the median predictor.There are several measurements whose reference ranges depend on both body size and age. As an example, models are developed here for the first four moments of the lung function variables forced expiratory volume in 1 s (FEV(1)), forced vital capacity (FVC) and FEV(1)/FVC in terms of height and age, in a data set of 3598 children and adults aged 4 to 80 years. The results show a strong multiplicative association between spirometry, height and age, with a large and nonlinear age effect across the age range. Variability also depends nonlinearly on age and to a lesser extent on height. FEV(1) and FVC are close to normally distributed, while FEV(1)/FVC is appreciably skew to the left. GAMLSS is a powerful technique for the construction of such references, which should be useful in clinical medicine. Copyright (c) 2008 John Wiley & Sons, Ltd.

  7. A first-principles study of short range order in Cu-Zn

    International Nuclear Information System (INIS)

    Slutter, M.; Turchi, P.E.A.; Johnson, D.D.; Nicholson, D.M.; Stocks, G.M.; Pinski, F.J.

    1990-01-01

    Recently, measurements of short-range order (SRO) diffuse neutron scattering intensity have been performed on quenched Cu-Zn alloys with 22.4 to 31.1 atomic percent (a/o) Zn, and pair interactions were obtained by inverse Monte Carlo simulation. These results are compared to SRO intensities and effective pair interactions obtained from first-principles electronic structure calculations. The theoretical SRO intensities were calculated with the cluster variation method (CVM) in the tetrahedron-octahedron approximation with first-principles pain interactions as input. More generally, phase stability in the Cu-Zn alloy system is discussed, using ab-initio energetic properties

  8. A Palaeoenvironmental contribution to the study of trashumance in the Gredos Mountain Range (Ávila

    Directory of Open Access Journals (Sweden)

    José Antonio López Sáez

    2009-04-01

    Full Text Available The Avilan sector of the Gredos Mountain Range represents one of the Iberian Peninsula’s most valuable cultural landscapes. From Prehistory to the present, the importance of trashumance in this region has played a key role in shaping its ecosystyems. Using pollen analysis to examine historical transformations in the region’s ecology, both those engendered by human activity and those relating to palaeoclimatic dynamics, this paper examines the diachronic evolution of the vegetation of the Serranillos Mountain Pass during the Late Holocene.

  9. Neutron diffraction study of the magnetic long-range order in Tb

    DEFF Research Database (Denmark)

    Dietrich, O.W.; Als-Nielsen, Jens Aage

    1967-01-01

    Like other heavy rare-earth metals, Tb exhibits a magnetic phase with a spiral structure. This appears within the temperature region from 216 to 226deg K between the ferromagnetic phase and the paramagnetic phase. The transition between ferromagnetic and spiral structure is of first order and imp...... at 216deg K to 20.7deg at 226deg K. The temperature variation of the transverse magnetostriction has also been measured and was found to vary approximately in proportion to the square of the magnetic long-range order....

  10. EXAFS study of short range order in Fe-Zr amorphous alloys

    International Nuclear Information System (INIS)

    Fernandez-Gubieda, M.L.; Gorria, P.; Barandiaran, J.M.; Barquin, L.F.

    1995-01-01

    Room temperature X-ray absorption spectra on Fe K-edge have been performed in Fe 100-x-y Zr x B y and Fe 86 Zr 7 Cu 1 B 6 alloys (x=7, 7.7, 9; y=0, 2, 4, 6). Fe-Fe coordination number and interatomic distances do not change in any sample. However, small changes in the Fe-Zr short range order, which could explain the evolution of the magnetic properties, have been observed. (orig.)

  11. Contribution to the study of the unresolved resonance range of the neutrons cross sections

    International Nuclear Information System (INIS)

    Noguere, Gilles

    2014-01-01

    This document presents the statistical description of neutron cross sections in the unresolved resonance range. The modeling of the total cross section and of the 'shape - elastic' cross section is based on the 'average R-Matrix' formalism. The partial cross sections describing the radiative capture, elastic scattering, inelastic scattering and fission process are calculated using the Hauser-Feshbach formalism with width fluctuation corrections. In the unresolved resonance range, these models depend on the average resonance parameters (neutron strength function Sc, mean level spacing D c , average partial reaction widths Γ c , channel radius a c , effective radius R' and distant level parameter R-bar c ∞ ). The codes (NJOY, CALENDF...) dedicated to the processing of nuclear data libraries (JEFF, ENDF/B, JENDL, CENDL, BROND... ) use the average parameters to take into account the self-shielding phenomenon for the simulation of the neutron transport in Monte-Carlo (MCNP, TRIPOLI... ) and deterministic (APOLLO, ERANOS...) codes. The evaluation work consists in establishing a consistent set of average parameters as a function of the total angular momentum J of the system and of the orbital moment of the incident neutron l. The work presented in this paper aims to describe the links between the S-Matrix and the 'average R-Matrix' formalism for the calculation of Sc, R-bar c ∞ , ac and R'. (author) [fr

  12. Detection and Host Range Study of Virus Associated with Pepper Yellow Leaf Curl Disease

    Directory of Open Access Journals (Sweden)

    SRI SULANDARI

    2006-03-01

    Full Text Available High incidence of Pepper yellow leaf curl virus (PepYLCV was observed in Indonesia since early 2000. Disease incidence in Yogyakarta, Central and West Java reached 100% on Capsicum frutescens, but only 10-35% on C. annuum. As an exception, the disease incidence on C. annuum cv. TM 999 was in the range of 70-100%. The causal agent of the disease, PepYLCV, was detected by polymerase chain reaction. Viral specific DNA fragment of the size ~1600 bp and ~550 bp was amplified from infected plants using two pairs of geminivirus universal primers pAL1v1978/pAL1c715, and pAv494/pAc1048, respectively. The PepYLCV has an intermediate host range including plants belonging to the family of Solanaceae, Leguminosae, and Compositae. The species belonging to the families of Cucurbitaceae, Malvaceae, Chenopodiaceae, and Amaranthaceae were resistant to the virus. Physalis floridana, is very prospective as a propagation host for the geminivirus infecting pepper. Nicotiana spp., cucumber, watermelon, cotton, and Sida sp. could be used as a differential host. Besides, Capsicum frutescens cv. Cakra, tomato, N. benthamiana, N. glutinosa, and Ageratum conyzoides could be used as indicator plants for the geminivirus infecting pepper.

  13. "Europe's wild heart" - new transboundary wilderness in the middle of the Old Continent

    Science.gov (United States)

    Hans Kiener; Zdenka Krenova

    2011-01-01

    The new born wilderness area "Europe's Wild Heart" is located on the border of two Central European states and is shared by two national parks - Bavarian Forest National Park and Sumava National Park. The Bavarian Forest NP with an area of more than 24,000 ha and the Sumava NP with more than 68,000 ha create the largest island of protected nature in the...

  14. Changes in the forest landscape of the Charles C. Deam wilderness, Southern Indiana, 1939-1990

    Science.gov (United States)

    MIchael A. Jenkins; George R. Parker

    2000-01-01

    We used aerial photographs from 1939, 1974, and 1990 to examine how land cover has changed on the 5,286-ha Charles C. Deam Wilderness of Hoosier National Forest over this time span. Digital elevation models were used to examine changes in land-cover class (closed-canopy forest, open forest, agriculture/old-field, clearcut, and pine plantation) within each land type (...

  15. Wilderness Education Association certification and safety, ecological impact, and curriculum standardization of graduates

    OpenAIRE

    Detzel, David

    1985-01-01

    Graduates of the Wilderness Education Association (W.E.A.) were surveyed by mail to investigate the effects of their certification on safety, ecological impact, and curriculum standardization of their subsequent leadership activities. Self-reports showed a slight, but not statistically significant, decrease in the number of post- W.E.A. course evacuations and rescues. Graduates reported a moderate W.E.A. influence on their accident records, and knowledge of W.E.A. stan...

  16. Wilderness, natural areas, and ecological reserves: thoughts on the politics of the big outside

    Science.gov (United States)

    R. McGreggor Cawley

    2000-01-01

    This essay offers some loosely organized comments on the project of preserving wilderness on the scale of the big outside. These comments are arranged around a subject that has been the topic of quite a bit of debate over the past few years—the possibility that the nature in our discussions about federal land and the environment is an artifact of social construction....

  17. Comparative study of joint range of motion in children between 7 and 12 years of age from different gender

    Directory of Open Access Journals (Sweden)

    S.I.L. Melo

    2011-01-01

    Full Text Available The aim of the study was to evaluate and compare active and passive joint range of motion in children in relation to gender and age. This study involved 103 children (43 boys and 60 girls categorized into two groups: G1 (7 to 9 years old and G2 (10 to 12 years old. The flexitest protocol, active and passive, and the SAPO® were used to evaluate joint range of motion. A paired t test was applied to compare active and passive joint range of motion and an independent t test (p < .05 was used to compare active and passive range of motion between gender and age. Results showed that the passive joint ranges of motion of the lower limbs are higher than active motion (p < .001. Girls presented greater passive ankle flexion than boys did (p = .002. Children between 7 and 12 years of age presented similar standards of joint range of motion of low limb. Significant differences were found between passive and active angular range of motion in the hip, knee and ankle. There were no differences between boys and girls in the joint range of motion as well as among age groups.

  18. A Study of LoRa: Long Range & Low Power Networks for the Internet of Things.

    Science.gov (United States)

    Augustin, Aloÿs; Yi, Jiazi; Clausen, Thomas; Townsley, William Mark

    2016-09-09

    LoRa is a long-range, low-power, low-bitrate, wireless telecommunications system, promoted as an infrastructure solution for the Internet of Things: end-devices use LoRa across a single wireless hop to communicate to gateway(s), connected to the Internet and which act as transparent bridges and relay messages between these end-devices and a central network server. This paper provides an overview of LoRa and an in-depth analysis of its functional components. The physical and data link layer performance is evaluated by field tests and simulations. Based on the analysis and evaluations, some possible solutions for performance enhancements are proposed.

  19. A Study of LoRa: Long Range & Low Power Networks for the Internet of Things

    Directory of Open Access Journals (Sweden)

    Aloÿs Augustin

    2016-09-01

    Full Text Available LoRa is a long-range, low-power, low-bitrate, wireless telecommunications system, promoted as an infrastructure solution for the Internet of Things: end-devices use LoRa across a single wireless hop to communicate to gateway(s, connected to the Internet and which act as transparent bridges and relay messages between these end-devices and a central network server. This paper provides an overview of LoRa and an in-depth analysis of its functional components. The physical and data link layer performance is evaluated by field tests and simulations. Based on the analysis and evaluations, some possible solutions for performance enhancements are proposed.

  20. Practice of building production planning system of company with a wide range of products - case study

    Directory of Open Access Journals (Sweden)

    Łukasz Hadaś

    2012-09-01

    Full Text Available Background: The complexity of the manufacturing environments of today's mechanical engineering companies and the number of both internal and external restrictions affecting to need of building tailored production planning and control systems. This statement is particularly important in conditions of companies with a wide range of products and different customer service strategies (different locations of the logistics decoupling point otherwise called "order penetration point". Streams of materials in these conditions require different management what is the main reason for carrying out research in business conditions by the authors. Material and methods: The research was carried out in industrial engineering in complex environmental conditions of production. This was a specializing in technology, multi-departments environment, with multiple streams of values and a wide range of products (about 500 items. The work was carried out under the transformation of the production system from the "push" logic of flow to "pull" logic of flow and building a dedicated system based on the best practice approach. Results: The paper describes the process of building tailored hybrid systems in the area of planning and shop flow control of production. The authors present the theoretical considerations on the issue and practical experiences. The authors present factors of selection of the transformation path and its road map. The article describes the part of the authors' own experience in the work on the methodology of transformation of Polish companies in the running business condition. Conclusions: Establishing the methodology of transformation of the production system is not a simple task. This paper presents only selected aspects of complex decision-making process. However, the authors presented work shows the important aspect of the transformation of production systems for these organizational conditions.

  1. Potential Environmental and Ecological Effects of Global Climate Change on Venomous Terrestrial Species in the Wilderness.

    Science.gov (United States)

    Needleman, Robert K; Neylan, Isabelle P; Erickson, Timothy

    2018-06-01

    Climate change has been scientifically documented, and its effects on wildlife have been prognosticated. We sought to predict the overall impact of climate change on venomous terrestrial species. We hypothesize that given the close relationship between terrestrial venomous species and climate, a changing global environment may result in increased species migration, geographical redistribution, and longer seasons for envenomation, which would have repercussions on human health. A retrospective analysis of environmental, ecological, and medical literature was performed with a focus on climate change, toxinology, and future modeling specific to venomous terrestrial creatures. Species included venomous reptiles, snakes, arthropods, spiders, and Hymenoptera (ants and bees). Animals that are vectors of hemorrhagic infectious disease (eg, mosquitos, ticks) were excluded. Our review of the literature indicates that changes to climatic norms will have a potentially dramatic effect on terrestrial venomous creatures. Empirical evidence demonstrates that geographic distributions of many species have already shifted due to changing climatic conditions. Given that most terrestrial venomous species are ectotherms closely tied to ambient temperature, and that climate change is shifting temperature zones away from the equator, further significant distribution and population changes should be anticipated. For those species able to migrate to match the changing temperatures, new geographical locations may open. For those species with limited distribution capabilities, the rate of climate change may accelerate faster than species can adapt, causing population declines. Specifically, poisonous snakes and spiders will likely maintain their population numbers but will shift their geographic distribution to traditionally temperate zones more often inhabited by humans. Fire ants and Africanized honey bees are expected to have an expanded range distribution due to predicted warming trends

  2. Response of lake chemistry to changes in atmospheric deposition and climate in three high-elevation wilderness areas of Colorado

    Science.gov (United States)

    Mast, M. Alisa; Turk, John T.; Clow, David W.; Campbell, Donald D.

    2011-01-01

    Trends in precipitation chemistry and hydrologic and climatic data were examined as drivers of long-term changes in the chemical composition of high-elevation lakes in three wilderness areas in Colorado during 1985-2008. Sulfate concentrations in precipitation decreased at a rate of -0.15 to -0.55 μeq/l/year at 10 high-elevation National Atmospheric Deposition Program stations in the state during 1987-2008 reflecting regional reductions in SO2 emissions. In lakes where sulfate is primarily derived from atmospheric inputs, sulfate concentrations also decreased although the rates generally were less, ranging from -0.12 to -0.27 μeq/l/year. The similarity in timing and sulfur isotopic data support the hypothesis that decreases in atmospheric deposition are driving the response of high-elevation lakes in some areas of the state. By contrast, in lakes where sulfate is derived primarily from watershed weathering sources, sulfate concentrations showed sharp increases during 1985-2008. Analysis of long-term climate records indicates that annual air temperatures have increased between 0.45 and 0.93°C per decade throughout most mountainous areas of Colorado, suggesting climate as a factor. Isotopic data reveal that sulfate in these lakes is largely derived from pyrite, which may indicate climate warming is preferentially affecting the rate of pyrite weathering.

  3. The impact of an outdoor wilderness program on the participants' sense of connectedness to the natural world

    Science.gov (United States)

    Nodurft, Susan Jennings Johnson

    The main objective of this study was to determine the impact of an innovative, outdoor wilderness program on the participants' sense of connectedness with the natural world. Ancillary objectives looked at the impact of epistemological and pedagogical program elements, participants' people and place background experiences, and worldviews on this connectedness sense. The weekend program, based upon a philosophy of deep ecology, draws upon the Native American wisdom tradition and employs a pedagogy of myth, modeling and experiential learning. The researcher and fourteen volunteers primarily drawn from biology classes at a community college participated in the study. Snyder's (1988) four themes of connectedness and a heuristic qualitative design described by Moustakas (1990) were employed in determining the essence of impact. Data collection methods included pre- and post-questionnaires, audio and video tapes of the weekend, field notes, journals, and follow-up interviews. Upon completion of data gathering, three co-researchers were selected for focus study. Results of analysis are described in the form of in-depth profiles of the three co-researchers' experiences containing verbatim narration and common themes explicated from those profiles. Findings revealed that (1) the co-researchers experienced a deep and transforming sense of connectedness with the natural world, (2) a number of key program elements could be identified that facilitated connectedness, (3) childhood experiences played a significant role, and (4) pre-existing biocentric worldviews deepened as a result of the wilderness experience. Several important implications resulted from this study: (1) Transformative programs such as the outdoor program in this study, virtually nonexistent in mainstream environmental education, need to be taken seriously and efforts made to incorporate these types of programs in our public schools, (2) science educators need to examine and amend a belief structure which, in

  4. Ethno Medical Studies In Talakona Forest Range of Chittor District, Andhra pradesh

    OpenAIRE

    Pratap, Goli Penchala; Prasad, G.P.; Sudarshanam, G.

    2009-01-01

    The flora of Talakona forest division has been studied for its ethnomedicinal wealth (Hemadri et al, Madhava Chetty et al). These studies have contributed immensely to the rural and forest economy. The present study revealed the medicinal use of 66 species of plants distributedin 40families. Many of the usages were unknown till date. About 65% of the medicinal applications of plants are for internal purposes. Majority of the external formulations are for conditions affecting the integumentary...

  5. Increased Alpha-Rhythm Dynamic Range Promotes Recovery from Visuospatial Neglect: A Neurofeedback Study

    Directory of Open Access Journals (Sweden)

    Tomas Ros

    2017-01-01

    Full Text Available Despite recent attempts to use electroencephalogram (EEG neurofeedback (NFB as a tool for rehabilitation of motor stroke, its potential for improving neurological impairments of attention—such as visuospatial neglect—remains underexplored. It is also unclear to what extent changes in cortical oscillations contribute to the pathophysiology of neglect, or its recovery. Utilizing EEG-NFB, we sought to causally manipulate alpha oscillations in 5 right-hemisphere stroke patients in order to explore their role in visuospatial neglect. Patients trained to reduce alpha oscillations from their right posterior parietal cortex (rPPC for 20 minutes daily, over 6 days. Patients demonstrated successful NFB learning between training sessions, denoted by improved regulation of alpha oscillations from rPPC. We observed a significant negative correlation between visuospatial search deficits (i.e., cancellation test and reestablishment of spontaneous alpha-rhythm dynamic range (i.e., its amplitude variability. Our findings support the use of NFB as a tool for investigating neuroplastic recovery after stroke and suggest reinstatement of intact parietal alpha oscillations as a promising target for reversing attentional deficits. Specifically, we demonstrate for the first time the feasibility of EEG-NFB in neglect patients and provide evidence that targeting alpha amplitude variability might constitute a valuable marker for clinical symptoms and self-regulation.

  6. Evolution of specialization: a phylogenetic study of host range in the red milkweed beetle (Tetraopes tetraophthalmus).

    Science.gov (United States)

    Rasmann, Sergio; Agrawal, Anurag A

    2011-06-01

    Specialization is common in most lineages of insect herbivores, one of the most diverse groups of organisms on earth. To address how and why specialization is maintained over evolutionary time, we hypothesized that plant defense and other ecological attributes of potential host plants would predict the performance of a specialist root-feeding herbivore (the red milkweed beetle, Tetraopes tetraophthalmus). Using a comparative phylogenetic and functional trait approach, we assessed the determinants of insect host range across 18 species of Asclepias. Larval survivorship decreased with increasing phylogenetic distance from the true host, Asclepias syriaca, suggesting that adaptation to plant traits drives specialization. Among several root traits measured, only cardenolides (toxic defense chemicals) correlated with larval survival, and cardenolides also explained the phylogenetic distance effect in phylogenetically controlled multiple regression analyses. Additionally, milkweed species having a known association with other Tetraopes beetles were better hosts than species lacking Tetraopes herbivores, and milkweeds with specific leaf area values (a trait related to leaf function and habitat affiliation) similar to those of A. syriaca were better hosts than species having divergent values. We thus conclude that phylogenetic distance is an integrated measure of phenotypic and ecological attributes of Asclepias species, especially defensive cardenolides, which can be used to explain specialization and constraints on host shifts over evolutionary time.

  7. A short and long range study of mullite-zirconia-zircon composites

    Energy Technology Data Exchange (ETDEWEB)

    Rendtorff, Nicolas M.; Conconi, Maria S.; Aglietti, Esteban F. [Centro de Tecnologia de Recursos Minerales y Ceramica (CETMIC: CONICET-CIC) (Argentina); Chain, Cecilia Y.; Pasquevich, Alberto F. [Universidad Nacional de La Plata, Departamento de Fisica, IFLP, Facultad de Ciencias Exactas (Argentina); Rivas, Patricia C. [CONICET (Argentina); Martinez, Jorge A., E-mail: toto@fisica.unlp.edu.ar; Caracoche, Maria C. [Universidad Nacional de La Plata, Departamento de Fisica, IFLP, Facultad de Ciencias Exactas (Argentina)

    2010-06-15

    In the field of refractory materials, ceramics containing mullite-zirconia are the basis of those most used in the industry of glass and steel. It is known that the addition of zircon improves the behavior of the refractory used in service. Knowing that some mullite-zirconia composites properties as fracture strength and the elastic modulus E are associated with the material microstructure integrity, the eventual thermal decomposition of zircon into zirconia and silica could seriously alter the material elastic properties. In this paper the phase content of a series of mullite-zirconia-zircon (3Al{sub 2}O{sub 3}.2SiO{sub 2}-ZrO{sub 2}-ZrSiO{sub 4}) composites is determined at atomic level via perturbed angular correlations (PAC) and compared with that derived from the long range X-ray diffraction technique. PAC results on the as-prepared materials indicate that all nominal zircon is present and that it involves two types of nanoconfigurations, one of them describing aperiodic regions. The thermomechanical properties already reported for these materials could be related to the crystalline to aperiodic zircon concentrations ratio they exhibit.

  8. Short-range order studies in nonstoichiometric transition metal carbides and nitrides by neutron diffuse scattering

    International Nuclear Information System (INIS)

    Priem, Thierry

    1988-01-01

    Short-range order in non-stoichiometric transition metal carbides and nitrides (TiN 0.82 , TiC 0.64 , TiC 0.76 , NbC 0.73 and NbC 0.83 ) was investigated by thermal neutron diffuse scattering on G4-4 (L.L.B - Saclay) and D10 (I.L.L. Grenoble) spectrometers. From experimental measurements, we have found that metalloid vacancies (carbon or nitrogen) prefer the f.c.c. third neighbour positions. Ordering interaction energies were calculated within the Ising model framework by three approximations: mean field (Clapp and Moss formula), Monte-Carlo simulation, Cluster variation Method. The energies obtained by the two latter methods are very close, and in qualitative agreement with theoretical values calculated from the band structure. Theoretical phase diagrams were calculated from these ordering energies for TiN x and TiC x ; three ordered structures were predicted, corresponding to compositions Ti 6 N 5 Ti 2 C and Ti 3 C 2 . On the other hand, atomic displacements are induced by vacancies. The metal first neighbours were found to move away from a vacancy, whereas the second neighbours move close to it. Near neighbour atomic displacements were theoretically determined by the lattice statics formalism with results in good agreement with experiment. (author) [fr

  9. Simulation study on characteristics of long-range interaction in randomly asymmetric exclusion process

    Science.gov (United States)

    Zhao, Shi-Bo; Liu, Ming-Zhe; Yang, Lan-Ying

    2015-04-01

    In this paper we investigate the dynamics of an asymmetric exclusion process on a one-dimensional lattice with long-range hopping and random update via Monte Carlo simulations theoretically. Particles in the model will firstly try to hop over successive unoccupied sites with a probability q, which is different from previous exclusion process models. The probability q may represent the random access of particles. Numerical simulations for stationary particle currents, density profiles, and phase diagrams are obtained. There are three possible stationary phases: the low density (LD) phase, high density (HD) phase, and maximal current (MC) in the system, respectively. Interestingly, bulk density in the LD phase tends to zero, while the MC phase is governed by α, β, and q. The HD phase is nearly the same as the normal TASEP, determined by exit rate β. Theoretical analysis is in good agreement with simulation results. The proposed model may provide a better understanding of random interaction dynamics in complex systems. Project supported by the National Natural Science Foundation of China (Grant Nos. 41274109 and 11104022), the Fund for Sichuan Youth Science and Technology Innovation Research Team (Grant No. 2011JTD0013), and the Creative Team Program of Chengdu University of Technology.

  10. Long-range plan for buried transuranic waste studies at the Idaho National Engineering Laboratory

    International Nuclear Information System (INIS)

    Low, J.O.

    1985-12-01

    This document presents a plan to perform detailed studies of alternatives considered for the long-term management of buried transuranic waste at the Idaho National Engineering Laboratory (INEL). The studies will provide the technical basis for DOE to make a decision on the future management of that waste. Although the waste is currently being handled in an acceptable manner, new solutions are continually being researched to improve management techniques. Three alternatives are being considered: (a) leave the waste as is; (b) improve in situ confinement of the waste; and (c) retrieve, process, and certify the waste for disposal at a federal repository. Fourteen studies are described in this plan for Alternatives 2 and 3. The leave-as-is alternative involves continuing present procedures for managing the buried waste. An ongoing environmental surveillance program, a low-level-waste stabilization program, and enhanced subsurface migration studies begun in FY-1984 at the INEL will provide data for the decision-making process for the INEL buried TRU waste. These ongoing studies for the leave-as-is alternative are summarized in this plan in limited detail. The improved-confinement alternative involves leaving the waste in place, but providing additional protection against wind, water penetration, erosion, and plant and animal intrusion. Several studies proposed under this alternative will examine special techniques to immobilize or encapsulate the buried waste. An in situ grouting study was implemented at the INEL starting in FY-1985 and will be completed at the end of FY-1986 with the grouting of a simulated INEL buried TRU waste trench. Studies of the third alternative will investigate improved retrieval, processing, and certification techniques. New equipment, such as industrial manipulators and excavating machinery, will be tested in the retrieval studies. Processing and certification studies will examine rapidly changing or new technologies

  11. Long-range plan for buried transuranic waste studies at the Idaho National Engineering Laboratory

    International Nuclear Information System (INIS)

    Berreth, P.D.; Fischer, D.K.; Suckel, R.A.

    1984-11-01

    This document presents a plan to perform detailed studies of alternatives considered for the long-term management of buried transuranic waste at the INEL. The studies will provide the technical basis for DOE to make a decision on the future management of that waste. Although the waste is currently being handled in an acceptable manner, new solutions are continually being researched to improve handling techniques. Three alternatives are being considered: (a) leave the waste as is; (b) improve in situ confinement of the waste; (c) retrieve, process, and certify the waste for disposal at a federal repository. Fifteen studies are described in this plan for the latter two alternatives. The leave-as-is alternative involves continuing present procedures for managing the buried waste. An ongoing environmental surveillance program, a low-level-waste stabilization program, and enhanced subsurface migration studies begun in FY-1984 at the INEL will provide data for the decision-making process for INEL buried TRU waste. These ongoing studies for the leave-as-is alternative are summarized in this plan in limited detail. The improved-confinement alternative involves leaving the waste in place, but providing additional protection against wind water penetration, erosion, and plant and animal intrusion. Several studies proposed will examine special techniques to immobilize or encapsulate the buried waste. Studies of the third alternative will investigate improved retrieval, processing and certification techniques. New equipment, such as industrial manipulators and excavating machinery, will be tested in the retrieval studies. Processing and certification studies will examine rapidly changing or new technologies. 19 references, 8 figures, 4 tables

  12. Study of short range order in alloy of glassy metals and effect of neutron irradiation on them

    International Nuclear Information System (INIS)

    Habibi, S.; Banaee, N.; Salman, M.; Gupta, A.; Principi, G.

    2000-04-01

    In this paper, we have studied a series of glassy metals with composition Fe 78-x Ni x Si 8 B 14 with x=0, 15, 25,38,53, 58. We have used Moessbauer spectroscopy to get information about short range order and local structure in these alloys. The specimens are exposed to neutron irradiation to perturb local structure and their short range order. The hyperfine parameters obtained from spectra before and after n-irradiation and are compared

  13. Celebrating the Past--Creating Our Future. Wilderness Education Association National Conference on Outdoor Leadership Proceedings (Paul Smith, New York, January 23-25, 2003).

    Science.gov (United States)

    Brawdy, Paul, Ed.; Luo, Ping, Ed.

    This proceedings of the 2003 Wilderness Education Association (WEA) conference contains 10 papers and presentation summaries on outdoor leadership, wilderness programs, and related training. Following a brief history of WEA, the entries are: (1) "Adventure Education and Rock 'n Roll: Sustaining the Revolution in Post-Communist Romania" (Dawn M.…

  14. Influence of landscape gradients in wilderness management and spatial climate on fire severity in the Northern Rockies USA, 1984 to 2010

    Science.gov (United States)

    Sandra L. Haire; Carol Miller; Kevin McGarigal

    2015-01-01

    Management activities, applied over broad scales, can potentially affect attributes of fire regimes including fire severity. Wilderness landscapes provide a natural laboratory for exploring effects of management because in some federally designated wilderness areas the burning of naturally ignited fires is promoted. In order to better understand the contribution of...

  15. Special offer: 7 days fly & drive Antarctica: The role of wilderness protection in deciding whether (semi) permanent tourist facilities in Antarctica should be prohibited

    NARCIS (Netherlands)

    Bastmeijer, Kees; Watson, A.; Sproull, J.; Dean, L.

    2007-01-01

    Antarctica is often described as one of 'world's last wildernesses'. Since 1990, tourism to this wilderness is developing rapidly. In a period of 15 years, the number of tourists that make landings in Antarctica has increased from 2,500 (1990/91) to more than 23.000 (2004/05). The diversity of

  16. Evaluation of the appropriate time range for estimating the apparent permeability coefficient (P(app)) in a transcellular transport study.

    Science.gov (United States)

    Ozeki, Kazuhisa; Kato, Motohiro; Sakurai, Yuuji; Ishigai, Masaki; Kudo, Toshiyuki; Ito, Kiyomi

    2015-11-30

    In a transcellular transport study, the apparent permeability coefficient (Papp) of a compound is evaluated using the range by which the amount of compound accumulated on the receiver side is assumed to be proportional to time. However, the time profile of the concentration of the compound in receiver (C3) often shows a lag time before reaching the linear range and later changes from linear to steady state. In this study, the linear range needed to calculate Papp in the C3-time profile was evaluated by a 3-compartment model. C3 was described by an equation with two steady states (C3=A3(1-e(-αt))+B3(1-e(-βt)), α>β), and by a simple approximate line (C3=A3-A3×αt) in the time range of 3/αtime, defined as the interception of the x axis, was described as 1/α. The rate constant α was affected by the membrane permeability clearance and intracellular unbound fraction, while β was affected only by the former. The linear range that was approximated in the present study was not uniformly defined within the time interval in which C3 remains at time range to evaluate Papp was 3/α

  17. The influence of study species selection on estimates of pesticide exposure in free-ranging birds

    Science.gov (United States)

    Borges, Shannon L.; Vyas, Nimish B.; Christman, Mary C.

    2014-01-01

    Field studies of pesticide effects on birds often utilize indicator species with the purpose 16 of extrapolating to other avian taxa. Little guidance exists for choosing indicator species to 17 monitor the presence and/or effects of contaminants that are labile in the environment or body, 18 but are acutely toxic, such as anticholinesterase (anti-ChE) insecticides. Use of an indicator 19 species that does not represent maximum exposure and/or effects could lead to inaccurate risk 20 estimates. Our objective was to test the relevance of a priori selection of indicator species for a 21 study on pesticide exposure to birds inhabiting fruit orchards. We used total plasma 22 cholinesterase (ChE) activity and ChE reactivation to describe the variability in anti-ChE exposure among avian species in two conventionally managed fruit orchards. Of seven 24 species included in statistical analyses, the less common species, chipping sparrow (Spizella 25 passerina), showed the greatest percentage of exposed individuals and the greatest ChE 26 depression, whereas the two most common species, American robins (Turdus migratorius) and 27 grey catbirds (Dumatella carolinensis), did not show significant exposure. Due to their lower 28 abundance, chipping sparrows would have been an unlikely choice for study. Our results show 29 that selection of indicator species using traditionally accepted criteria such as abundance and 30 ease of collection may not identify species that are at greatest risk. Our efforts also demonstrate 31 the usefulness of conducting multiple-species pilot studies prior to initiating detailed studies on 32 pesticide effects. A study such as ours can help focus research and resources on study species 33 that are most appropriate.

  18. Counseling for the Wilderness Athlete and Adventurer During a Preparticipation Evaluation for Preparation, Safety, and Injury Prevention.

    Science.gov (United States)

    Young, Justin Mark J; Campbell, Aaron D; Raastad, Kate K

    2015-12-01

    Wilderness sports and adventures continue to increase in popularity. Counseling is an essential element of the preparticipation evaluation (PPE) for athletes in traditional sports. This approach can be applied to and augmented for the wilderness athlete and adventurer. The authors reviewed the literature on counseling during PPEs and gathered expert opinion from medical professionals who perform such PPEs for wilderness sports enthusiasts. The objective was to present findings of this review and make recommendations on the counseling component of a wilderness sports/adventure PPE. The counseling component of a PPE for wilderness sports/adventures should take place after a basic medical evaluation, and include a discussion on sport or activity-specific injury prevention, personal health, travel recommendations, and emergency event planning. Counseling should be individualized and thorough, and involve shared decision making. This should take place early enough to allow ample time for the athlete or adventurer to further prepare as needed based on the recommendations. Resources may be recommended for individuals desiring more information on selected topics. Copyright © 2015. Published by Elsevier Inc.

  19. Long-range corrected density functional theory study on static second hyperpolarizabilities of singlet diradical systems.

    Science.gov (United States)

    Kishi, Ryohei; Bonness, Sean; Yoneda, Kyohei; Takahashi, Hideaki; Nakano, Masayoshi; Botek, Edith; Champagne, Benoît; Kubo, Takashi; Kamada, Kenji; Ohta, Koji; Tsuneda, Takao

    2010-03-07

    Within the spin-unrestricted density functional theory (DFT) the long-range correction (LC) scheme combined with the Becke-Lee-Yang-Parr exchange-correlation functional, referred to as LC-UBLYP method, has been applied to the calculation of the second hyperpolarizability (gamma) of open-shell singlet diradical systems of increasing complexity and has demonstrated good performance: (i) for the simplest H(2) dissociation model, the gamma values calculated by the LC-UBLYP method significantly overshoot the full configuration interaction result but reproduce qualitatively the evolution of gamma as a function of the diradical character, (ii) for small singlet diradical 1,3-dipole systems, the diradical character dependence of gamma determined by the UCCSD and UCCSD(T) reference methods is reproduced semiquantitatively by the LC-UBLYP method except in the small diradical character region, where the spin-unrestricted solutions coincide with spin-restricted solutions, (iii) the LC-UBLYP method also closely reproduces the UCCSD(T) results on the diradical character dependence of gamma of the p-quinodimethane model system, particularly in the intermediate and large diradical character regions, whereas it shows an abrupt change for a diradical character (y) close to 0.2 originating from the triplet instability, (iv) the reliability of LC-UBLYP to reproduce reference coupled cluster results on open-shell singlet systems with intermediate and large diradical characters has also been substantiated in the case of gamma of 1,4-bis-(imidazol-2-ylidene)-cyclohexa-2,5-diene (BI2Y), then (v), for real systems built from a pair of phenalenyl radicals separated by a conjugated linker, the LC-UBLYP results have been found to closely match the UBHandHLYP values-which, for small systems are in good agreement with those obtained using correlated molecular orbital methods-whereas the UB3LYP results can be much different. These results are not only important from the viewpoint of an efficient

  20. Empirical study of long-range connections in a road network offers new ingredient for navigation optimization models

    International Nuclear Information System (INIS)

    Wang, Pu; Liu, Like; Li, Xiamiao; Li, Guanliang; González, Marta C

    2014-01-01

    Navigation problem in lattices with long-range connections has been widely studied to understand the design principles for optimal transport networks; however, the travel cost of long-range connections was not considered in previous models. We define long-range connection in a road network as the shortest path between a pair of nodes through highways and empirically analyze the travel cost properties of long-range connections. Based on the maximum speed allowed in each road segment, we observe that the time needed to travel through a long-range connection has a characteristic time T h  ∼ 29 min, while the time required when using the alternative arterial road path has two different characteristic times T a  ∼ 13 and 41 min and follows a power law for times larger than 50 min. Using daily commuting origin–destination matrix data, we additionally find that the use of long-range connections helps people to save about half of the travel time in their daily commute. Based on the empirical results, we assign a more realistic travel cost to long-range connections in two-dimensional square lattices, observing dramatically different minimum average shortest path 〈l〉 but similar optimal navigation conditions. (paper)

  1. Empirical study of long-range connections in a road network offers new ingredient for navigation optimization models

    Science.gov (United States)

    Wang, Pu; Liu, Like; Li, Xiamiao; Li, Guanliang; González, Marta C.

    2014-01-01

    Navigation problem in lattices with long-range connections has been widely studied to understand the design principles for optimal transport networks; however, the travel cost of long-range connections was not considered in previous models. We define long-range connection in a road network as the shortest path between a pair of nodes through highways and empirically analyze the travel cost properties of long-range connections. Based on the maximum speed allowed in each road segment, we observe that the time needed to travel through a long-range connection has a characteristic time Th ˜ 29 min, while the time required when using the alternative arterial road path has two different characteristic times Ta ˜ 13 and 41 min and follows a power law for times larger than 50 min. Using daily commuting origin-destination matrix data, we additionally find that the use of long-range connections helps people to save about half of the travel time in their daily commute. Based on the empirical results, we assign a more realistic travel cost to long-range connections in two-dimensional square lattices, observing dramatically different minimum average shortest path but similar optimal navigation conditions.

  2. Ion generation and CPC detection efficiency studies in sub 3-nm size range

    Energy Technology Data Exchange (ETDEWEB)

    Kangasluoma, J.; Junninen, H.; Sipilae, M.; Kulmala, M.; Petaejae, T. [Department of Physics, P.O. Box 64, 00014, University of Helsinki, Helsinki (Finland); Lehtipalo, K. [Department of Physics, P.O. Box 64, 00014, University of Helsinki, Helsinki (Finland); Airmodus Ltd., Finland, Gustaf Haellstroemin katu 2 A, 00560 Helsinki (Finland); Mikkilae, J.; Vanhanen, J. [Airmodus Ltd., Finland, Gustaf Haellstroemin katu 2 A, 00560 Helsinki (Finland); Attoui, M. [University Paris Est Creteil, University Paris-Diderot, LISA, UMR CNRS 7583 (France); Worsnop, D. [Department of Physics, P.O. Box 64, 00014, University of Helsinki, Helsinki (Finland) and Aerodyne Research Inc., Billerica, MA (United States)

    2013-05-24

    We studied the chemical composition of commonly used condensation particle counter calibration ions with a mass spectrometer and found that in our calibration setup the negatively charged ammonium sulphate, sodium chloride and tungsten oxide are the least contaminated whereas silver on both positive and negative and the three mentioned earlier in positive mode are contaminated with organics. We report cut-off diameters for Airmodus Particle Size Magnifier (PSM) 1.1, 1.3, 1.4, 1.6 and 1.6-1.8 nm for negative sodium chloride, ammonium sulphate, tungsten oxide, silver and positive organics, respectively. To study the effect of sample relative humidity on detection efficiency of the PSM we used different humidities in the differential mobility analyzer sheath flow and found that with increasing relative humidity also the detection efficiency of the PSM increases.

  3. Ion generation and CPC detection efficiency studies in sub 3-nm size range

    International Nuclear Information System (INIS)

    Kangasluoma, J.; Junninen, H.; Sipilä, M.; Kulmala, M.; Petäjä, T.; Lehtipalo, K.; Mikkilä, J.; Vanhanen, J.; Attoui, M.; Worsnop, D.

    2013-01-01

    We studied the chemical composition of commonly used condensation particle counter calibration ions with a mass spectrometer and found that in our calibration setup the negatively charged ammonium sulphate, sodium chloride and tungsten oxide are the least contaminated whereas silver on both positive and negative and the three mentioned earlier in positive mode are contaminated with organics. We report cut-off diameters for Airmodus Particle Size Magnifier (PSM) 1.1, 1.3, 1.4, 1.6 and 1.6-1.8 nm for negative sodium chloride, ammonium sulphate, tungsten oxide, silver and positive organics, respectively. To study the effect of sample relative humidity on detection efficiency of the PSM we used different humidities in the differential mobility analyzer sheath flow and found that with increasing relative humidity also the detection efficiency of the PSM increases.

  4. Epidemiological study of recent death risk of Nagasaki A-bomb survivors exposed at close range

    International Nuclear Information System (INIS)

    Ishii, Keiichiro; Mine, Mariko; Okumura, Yutaka.

    1992-01-01

    To elucidate the hormetic effect on health of human exposed with very low-dose ionizing radiation, we preliminary investigate the epidemiological study of Nagasaki A-bomb survivors. The major results are as follows; (1) Nagasaki A-bomb survivors exposed with 2-18 cGy are investigated, and the epidemiological data-base of Nagasaki A-bomb survivors are updated by these new data. (2) An applicability of the expanded new data-base to epidemiological analysis is investigated. Based on this investigation, the theme of epidemiological study to elucidate the hormetic effect on human health are discussed. (3) Effects of A-bomb dose on risk of total death cause, cancer death and non-cancer death are analysed by epidemiological method. The relative frequency of non-cancer death cause on male survivors exposed with 50-99 cGy is decreased relative to unexposed controls. (author)

  5. [Religiousness of patients with diagnosis of schizophrenia. Wide-ranging studies].

    Science.gov (United States)

    Tomczak, Piotr

    2006-01-01

    (1) The correlations between: (1.1) various aspects of religiousness and (1.2) age, anxiety-state, anxiety-trait, locus of control, and, in the group of patients with shizophrenia: span of treatment, rate of therapy, ego psychopathology, paranoid and depression dimensions, self-rating of state of self-feeling, state of feeling of illness, and quality of life and (2) the comparison of various aspects of religiousness of patients with schizophrenia and healthy people were studied. The Scale of Christian Religiousness, Individual Religiousness Scale, Intrinsic, Extrinsic and Quest Religious Orientation Scales, Scale of Fundamentalism, State-Trait Anxiety Inventory, Rotter's questionnaire of locus of control, Scharfetter's questionnaire of ego psychopathology, Paranoid-Depresivity Scale-abridgment, Frankfurt Self-feeling Scale-abridgment, visual analogy of self-feeling, visual analogy of feeling of illness, and questionnaire of quality of life (WHOQOL-BREF) were used in the study. 91 adults both of sexes, 60 patients with a diagnosis of schizophrenia according to ICD-10 and DCR-10 in the diagnostic group and 31 healthy persons were studied. It was noticed that: (1) various correlations are manifested between religiousness and psychopathology of patients with schizophrenia; (2) patients diagnosed as having schizophrenia have a significantly higher level of extrinsic religiousness and fundamentalism than healthy individuals; (3) many results pointed out in the bibliography had no verification in these studies. Intrinsic, extrinsic, quest, and orthodox religiousness and fundamentalism realize significant functions in psychopathology of schizophrenia disorder. The knowledge about religiousness of schizophrenia patients can be important for diagnostic and therapeutic processes of the disorder.

  6. A Randomized Dose-Ranging Study of Neuropeptide Y in Patients with Posttraumatic Stress Disorder.

    Science.gov (United States)

    Sayed, Sehrish; Van Dam, Nicholas T; Horn, Sarah R; Kautz, Marin M; Parides, Michael; Costi, Sara; Collins, Katherine A; Iacoviello, Brian; Iosifescu, Dan V; Mathé, Aleksander A; Southwick, Steven M; Feder, Adriana; Charney, Dennis S; Murrough, James W

    2018-01-01

    Anxiety and trauma-related disorders are among the most prevalent and disabling medical conditions in the United States, and posttraumatic stress disorder in particular exacts a tremendous public health toll. We examined the tolerability and anxiolytic efficacy of neuropeptide Y administered via an intranasal route in patients with posttraumatic stress disorder. Twenty-six individuals were randomized in a cross-over, single ascending dose study into 1 of 5 cohorts: 1.4 mg (n=3), 2.8 mg (n=6), 4.6 mg (n=5), 6.8 mg (n=6), and 9.6 mg (n=6). Each individual was dosed with neuropeptide Y or placebo on separate treatment days 1 week apart in random order under double-blind conditions. Assessments were conducted at baseline and following a trauma script symptom provocation procedure subsequent to dosing. Occurrence of adverse events represented the primary tolerability outcome. The difference between treatment conditions on anxiety as measured by the Beck Anxiety Inventory and the State-Trait Anxiety Inventory immediately following the trauma script represented efficacy outcomes. Twenty-four individuals completed both treatment days. Neuropeptide Y was well tolerated up to and including the highest dose. There was a significant interaction between treatment and dose; higher doses of neuropeptide Y were associated with a greater treatment effect, favoring neuropeptide Y over placebo on Beck Anxiety Inventory score (F1,20=4.95, P=.038). There was no significant interaction for State-Trait Anxiety Inventory score. Our study suggests that a single dose of neuropeptide Y is well tolerated up to 9.6 mg and may be associated with anxiolytic effects. Future studies exploring the safety and efficacy of neuropeptide Y in stress-related disorders are warranted. The reported study is registered at: http://clinicaltrials.gov (ID: NCT01533519). © The Author(s) 2017. Published by Oxford University Press on behalf of CINP.

  7. Impacts of biogeographic history and marginal population genetics on species range limits: a case study of Liriodendron chinense.

    Science.gov (United States)

    Yang, Aihong; Dick, Christopher W; Yao, Xiaohong; Huang, Hongwen

    2016-05-10

    Species ranges are influenced by past climate oscillations, geographical constraints, and adaptive potential to colonize novel habitats at range limits. This study used Liriodendron chinense, an important temperate Asian tree species, as a model system to evaluate the roles of biogeographic history and marginal population genetics in determining range limits. We examined the demographic history and genetic diversity of 29 L. chinense populations using both chloroplast and nuclear microsatellite loci. Significant phylogeographic structure was recovered with haplotype clusters coinciding with major mountain regions. Long-term demographical stability was suggested by mismatch distribution analyses, neutrality tests, and ecological niche models (ENM) and suggested the existence of LGM refuges within mountain regions. Differences in genetic diversity between central and marginal populations were not significant for either genomic region. However, asymmetrical gene flow was inferred from central populations to marginal populations, which could potentially limit range adaptation and expansion of L. chinense.

  8. Underwater Ranging

    OpenAIRE

    S. P. Gaba

    1984-01-01

    The paper deals with underwater laser ranging system, its principle of operation and maximum depth capability. The sources of external noise and methods to improve signal-to-noise ratio are also discussed.

  9. Study on Dihydrated Praseodymium Acetylacetonate by Photoacoustic Spectra with Broad Wavelength Range

    Institute of Scientific and Technical Information of China (English)

    于锡娟; 伍荣护; 宋慧宇; 苏庆德

    2003-01-01

    The UV-Vis, NIR and MIR photoacoustic spectra of Pr(aa)3*2H2O were measured and most f-f transition peaks of Pr3+ are detected. The peak split and peak shift are studied also. The covalency parameter is calculated and it turns out that the covalent bonds between Pr(Ⅲ) ions and ligands exist. The results conclude that photoacoustic spectroscopy offers a unique and complementary method in analysis of solid rare earth complexes. Compared with conventional FT-IR transmission and absorption approaches, PAS has the advantages of fast, nondestructive analysis and high resolution.

  10. Low range of ankle dorsiflexion predisposes for patellar tendinopathy in junior elite basketball players: a 1-year prospective study.

    Science.gov (United States)

    Backman, Ludvig J; Danielson, Patrik

    2011-12-01

    Patellar tendinopathy (PT) is one of the most common reasons for sport-induced pain of the knee. Low ankle dorsiflexion range might predispose for PT because of load-bearing compensation in the patellar tendon. The purpose of this 1-year prospective study was to analyze if a low ankle dorsiflexion range increases the risk of developing PT for basketball players. Cohort study (prognosis); Level of evidence, 2. Ninety junior elite basketball players were examined for different characteristics and potential risk factors for PT, including ankle dorsiflexion range in the dominant and nondominant leg. Data were collected over a 1-year period and follow-up, including reexamination, was made at the end of the year. Seventy-five players met the inclusion criteria. At the follow-up, 12 players (16.0%) had developed unilateral PT. These players were found to have had a significantly lower mean ankle dorsiflexion range at baseline than the healthy players, with a mean difference of -4.7° (P = .038) for the dominant limb and -5.1° (P = .024) for the nondominant limb. Complementary statistical analysis showed that players with dorsiflexion range less than 36.5° had a risk of 18.5% to 29.4% of developing PT within a year, as compared with 1.8% to 2.1% for players with dorsiflexion range greater than 36.5°. Limbs with a history of 2 or more ankle sprains had a slightly less mean ankle dorsiflexion range compared to those with 0 or 1 sprain (mean difference, -1.5° to -2.5°), although this was only statistically significant for nondominant legs. This study clearly shows that low ankle dorsiflexion range is a risk factor for developing PT in basketball players. In the studied material, an ankle dorsiflexion range of 36.5° was found to be the most appropriate cutoff point for prognostic screening. This might be useful information in identifying at-risk individuals in basketball teams and enabling preventive actions. A history of ankle sprains might contribute to reduced ankle

  11. Study of the virtual Compton scattering in the deep inelastic range (DVCS) with the COMPASS installation

    International Nuclear Information System (INIS)

    Mosse, L.

    2002-02-01

    The experimental and theoretical aspects of the deep virtual Compton scattering (DVCS) are presented in the first chapter. The prevailing amplitude of DVCS is developed to lead to the introduction of the generalized distributions of partons. The second chapter is centered on the measurement campaigns performed throughout the world concerning DVCS processes and meson production. The experimental achieving of DVCS is difficult because it is an exclusive process that requires a perfect identification and moreover its cross-section is low. In the third chapter the author presents a feasibility study of a DVCS experiment using Compass installation in CERN, this experiment requires the designing of a recoil detector. By developing the theoretical studies presented in the first chapter, the author has computed an estimation of the expected counting rate. The main difficulty of this work is to be able to discriminate some events that lead to the same final state as DVCS. It is the case of the event characterized by the production of pions with very low impulse, the fourth chapter is dedicated to determination of the value of the cross-section of that event. A prototype of a recoil detector has been designed and tested and the first preliminary results are presented in the last chapter. (A.C.)

  12. A study of tectonic activity in the Basin-Range Province and on the San Andreas Fault. No. 1: Kinematics of Basin-Range intraplate extension

    Science.gov (United States)

    Eddington, P. K.; Smith, R. B.; Renggli, C.

    1986-01-01

    Strain rates assessed from brittle fracture and total brittle-ductile deformation measured from geodetic data were compared to estimates of paleo-strain from Quaternary geology for the intraplate Great Basin part of the Basin-Range, western United States. These data provide an assessment of the kinematics and mode of lithospheric extension that the western U.S. Cordillera has experienced from the past few million years to the present. Strain and deformation rates were determined by the seismic moment tensor method using historic seismicity and fault plane solutions for sub-regions of homogeneous strain. Contemporary deformation in the Great Basin occurs principally along the active seismic zones. The integrated opening rate across the entire Great Basin is accommodated by E-E extension at 8 to 10 mm/a in the north that diminishes to NW-SE extension of 3.5 mm/a in the south. Zones of maximum lithospheric extension correspond to belts of thin crust, high heat flow, and Quaternary basaltic volcanism, suggesting that these parameters are related through mechanism of extension such as a stress relaxation, allowing bouyant uplift and ascension of magmas.

  13. Study of the long-range transport of atmospheric pollutants by instrumental neutron activation analysis

    International Nuclear Information System (INIS)

    Jin Yangshao

    1994-01-01

    Aerosol samples were collected to study the characteristics of marine aerosols in the different western Pacific ocean areas. During the first cruise from 15 October to 25 November 1989, aerosol samples were collected with a kA-200 Andersen cascade impactor and a kB-120 sampler. Instrumental neutron activation analysis was used to determine the elemental composition of the aerosols. The concentrations of crustal and pollution elements in aerosols were higher over the ocean area close to the China coast and decreased very rapidly with increasing distance from land. The morphology and elemental composition of aerosol particles showed that the seasalt particles may conglomerate with small crustal and pollution particles from land to form large particles. (author). 4 refs, 1 fig., 1 tab

  14. Elephant (Loxodonta africana home ranges in Sabi Sand Reserve and Kruger National Park: a five-year satellite tracking study.

    Directory of Open Access Journals (Sweden)

    Bindi Thomas

    Full Text Available During a five-year GPS satellite tracking study in Sabi Sand Reserve (SSR and Kruger National Park (KNP we monitored the daily movements of an elephant cow (Loxodonta africana from September 2003 to August 2008. The study animal was confirmed to be part of a group of seven elephants therefore her position is representative of the matriarchal group. We found that the study animal did not use habitat randomly and confirmed strong seasonal fidelity to its summer and winter five-year home ranges. The cow's summer home range was in KNP in an area more than four times that of her SSR winter home range. She exhibited clear park habitation with up to three visits per year travelling via a well-defined northern or southern corridor. There was a positive correlation between the daily distance the elephant walked and minimum daily temperature and the elephant was significantly closer to rivers and artificial waterholes than would be expected if it were moving randomly in KNP and SSR. Transect lines established through the home ranges were surveyed to further understand the fine scale of the landscape and vegetation representative of the home ranges.

  15. Elephant (Loxodonta africana) home ranges in Sabi Sand Reserve and Kruger National Park: a five-year satellite tracking study.

    Science.gov (United States)

    Thomas, Bindi; Holland, John D; Minot, Edward O

    2008-01-01

    During a five-year GPS satellite tracking study in Sabi Sand Reserve (SSR) and Kruger National Park (KNP) we monitored the daily movements of an elephant cow (Loxodonta africana) from September 2003 to August 2008. The study animal was confirmed to be part of a group of seven elephants therefore her position is representative of the matriarchal group. We found that the study animal did not use habitat randomly and confirmed strong seasonal fidelity to its summer and winter five-year home ranges. The cow's summer home range was in KNP in an area more than four times that of her SSR winter home range. She exhibited clear park habitation with up to three visits per year travelling via a well-defined northern or southern corridor. There was a positive correlation between the daily distance the elephant walked and minimum daily temperature and the elephant was significantly closer to rivers and artificial waterholes than would be expected if it were moving randomly in KNP and SSR. Transect lines established through the home ranges were surveyed to further understand the fine scale of the landscape and vegetation representative of the home ranges.

  16. Merging long range transportation planning with public health: a case study from Utah's Wasatch Front.

    Science.gov (United States)

    Burbidge, Shaunna K

    2010-01-01

    US transportation systems have been identified as a problem for public health, as they often encourage automobile transportation and discourage physical activity. This paper provides a case study examination of the Public Health Component of the Wasatch Front Regional Council's Regional Transportation Plan. This plan provides an example of what transportation planners at Utah's largest metropolitan planning organization (MPO) are doing to encourage physical activity through transportation. Existing active living research was used to guide recommendations using a process that included a comprehensive literature review and a review of existing state programs, advisory group and stakeholder meetings, and policy recommendations based on existing local conditions. Stakeholders from a diversity of background and interests came together with one common goal: to improve public health. Based on this collaborative process, nine policy approaches were specifically recommended for approval and integration in the Wasatch Front Regional Transportation Plan. By using current research as a guide and integrating a variety of interests, the Wasatch Front Regional Council is setting a new standard for a collaborative multi-modal focus in transportation planning, which can be replicated nationwide.

  17. Procrastination, Distress and Life Satisfaction across the Age Range - A German Representative Community Study.

    Directory of Open Access Journals (Sweden)

    Manfred E Beutel

    Full Text Available Addressing the lack of population-based data the purpose of this representative study was to assess procrastination and its associations with distress and life satisfaction across the life span. A representative German community sample (1,350 women; 1,177 men between the ages of 14 and 95 years was examined by the short form of the General Procrastination Scale (GPS-K; 1 and standardized scales of perceived stress, depression, anxiety, fatigue and life satisfaction. As hypothesized, procrastination was highest in the youngest cohort (14-29 years. Only in the youngest and most procrastinating cohort (aged 14 to 29 years, men procrastinated more than women. As we had further hypothesized, procrastination was consistently associated with higher stress, more depression, anxiety, fatigue and reduced satisfaction across life domains, especially regarding work and income. Associations were also found with lack of a partnership and unemployment. Findings are discussed with regard to potential developmental and cohort effects. While procrastination appears to be a pervasive indicator for maladjustment, longitudinal analyses in high-risk samples (e.g. late adolescence, unemployment are needed to identify means and mechanisms of procrastinating.

  18. Atom probe field ion microscope study of the range and diffusivity of helium in tungsten

    International Nuclear Information System (INIS)

    Wagner, A.

    1978-08-01

    A time-of-flight (TOF) atom-probe field-ion microscope (FIM) specifically designed for the study of defects in metals is described. With this automated system 600 TOF min -1 can be recorded and analyzed. Performance tests of the instrument demonstrated that (1) the seven isotopes of molybdenum and the five isotopes of tungsten can be clearly resolved; and (2) the concentration and spatial distribution of all constitutents present at levels greater than 0.05 at. % in a W--25 at. % Re, Mo--1.0 at. % Ti, Mo--1.0 at. % Ti--0.08 at. % Zr (TZM), a low swelling stainless steel (LS1A) and a metallic glass (Metglas 2826) can be measured. The effect of the rate of field evaporation on the quantitative atom probe analysis of a Mo--1.0 at. % Ti alloy and a Mo--1.0 at. % Ti--0.08 at. % Zr alloy was investigated. As the field evaporation rate increased the measured Ti concentration was found to also increase. A simple qualitative model was proposed to explain the observation. The spatial distribution of titanium in a fast neutron irradiated Mo--1.0 at. % Ti alloy has been investigated. No evidence of Ti segregation to the voids was detected nor has any evidence of significant resolution of Ti from the TiC precipitates been detected. A small amount of segregation of carbon to a void was detected

  19. Procrastination, Distress and Life Satisfaction across the Age Range - A German Representative Community Study.

    Science.gov (United States)

    Beutel, Manfred E; Klein, Eva M; Aufenanger, Stefan; Brähler, Elmar; Dreier, Michael; Müller, Kai W; Quiring, Oliver; Reinecke, Leonard; Schmutzer, Gabriele; Stark, Birgit; Wölfling, Klaus

    2016-01-01

    Addressing the lack of population-based data the purpose of this representative study was to assess procrastination and its associations with distress and life satisfaction across the life span. A representative German community sample (1,350 women; 1,177 men) between the ages of 14 and 95 years was examined by the short form of the General Procrastination Scale (GPS-K; 1) and standardized scales of perceived stress, depression, anxiety, fatigue and life satisfaction. As hypothesized, procrastination was highest in the youngest cohort (14-29 years). Only in the youngest and most procrastinating cohort (aged 14 to 29 years), men procrastinated more than women. As we had further hypothesized, procrastination was consistently associated with higher stress, more depression, anxiety, fatigue and reduced satisfaction across life domains, especially regarding work and income. Associations were also found with lack of a partnership and unemployment. Findings are discussed with regard to potential developmental and cohort effects. While procrastination appears to be a pervasive indicator for maladjustment, longitudinal analyses in high-risk samples (e.g. late adolescence, unemployment) are needed to identify means and mechanisms of procrastinating.

  20. Procrastination, Distress and Life Satisfaction across the Age Range – A German Representative Community Study

    Science.gov (United States)

    2016-01-01

    Addressing the lack of population-based data the purpose of this representative study was to assess procrastination and its associations with distress and life satisfaction across the life span. A representative German community sample (1,350 women; 1,177 men) between the ages of 14 and 95 years was examined by the short form of the General Procrastination Scale (GPS-K; 1) and standardized scales of perceived stress, depression, anxiety, fatigue and life satisfaction. As hypothesized, procrastination was highest in the youngest cohort (14–29 years). Only in the youngest and most procrastinating cohort (aged 14 to 29 years), men procrastinated more than women. As we had further hypothesized, procrastination was consistently associated with higher stress, more depression, anxiety, fatigue and reduced satisfaction across life domains, especially regarding work and income. Associations were also found with lack of a partnership and unemployment. Findings are discussed with regard to potential developmental and cohort effects. While procrastination appears to be a pervasive indicator for maladjustment, longitudinal analyses in high-risk samples (e.g. late adolescence, unemployment) are needed to identify means and mechanisms of procrastinating. PMID:26871572

  1. X-ray structural studies of quinone reductase 2 nanomolar range inhibitors

    Energy Technology Data Exchange (ETDEWEB)

    Pegan, Scott D.; Sturdy, Megan; Ferry, Gilles; Delagrange, Philippe; Boutin, Jean A.; Mesecar, Andrew D. (IdRS); (Purdue); (Colorado); (UIC)

    2011-09-06

    Quinone reductase 2 (QR2) is one of two members comprising the mammalian quinone reductase family of enzymes responsible for performing FAD mediated reductions of quinone substrates. In contrast to quinone reductase 1 (QR1) which uses NAD(P)H as its co-substrate, QR2 utilizes a rare group of hydride donors, N-methyl or N-ribosyl nicotinamide. Several studies have linked QR2 to the generation of quinone free radicals, several neuronal degenerative diseases, and cancer. QR2 has been also identified as the third melatonin receptor (MT3) through in cellulo and in vitro inhibition of QR2 by traditional MT3 ligands, and through recent X-ray structures of human QR2 (hQR2) in complex with melatonin and 2-iodomelatonin. Several MT3 specific ligands have been developed that exhibit both potent in cellulo inhibition of hQR2 nanomolar, affinity for MT3. The potency of these ligands suggest their use as molecular probes for hQR2. However, no definitive correlation between traditionally obtained MT3 ligand affinity and hQR2 inhibition exists limiting our understanding of how these ligands are accommodated in the hQR2 active site. To obtain a clearer relationship between the structures of developed MT3 ligands and their inhibitory properties, in cellulo and in vitro IC{sub 50} values were determined for a representative set of MT3 ligands (MCA-NAT, 2-I-MCANAT, prazosin, S26695, S32797, and S29434). Furthermore, X-ray structures for each of these ligands in complex with hQR2 were determined allowing for a structural evaluation of the binding modes of these ligands in relation to the potency of MT3 ligands.

  2. Methodological studies for long range environmental gamma rate survey in Brazil

    International Nuclear Information System (INIS)

    Souza, Elder M.; Wasserman, Maria Angelica V.; Rochedo, Elaine R. R.

    2009-01-01

    The objective of this work is to support the establishment of a methodology for gamma radiation survey over large areas in order to estimate public exposure to natural background radiation in Brazil. In a first stage, two different sites close to large water bodies were chosen, Guanabara Bay, RJ and Amazon River close to Santarem, PA. Early results showed similar results for over water surveys despite the type of water body. Dose rates over land are higher than those over water, due to the natural radioactivity on soil, pavements and other building materials. In this study the focus was on variability of measurements performed in the same area and variability for different types of area, including roads and urbanized environments. Several measurements have been performed of several areas, that included roads and towns in Para, Bahia, Rio de Janeiro and Minas Gerais. Measurements were done by car and on boats, using a AT6101C Scanner - Spectral Radiation Scanner. Differences were detected for different areas, with roads generally presenting lower dose rates than highly urbanized areas. Also, for roads close to granite rocks and mountains, dose rates are higher than those at both coastal areas and inland lowlands. Large towns present large variability, with individual measurements close to average dose rates from anomalous uranium sites. The results will be used to derive a methodology for assessing background radiation exposure for the Brazilian population. It can be concluded that surveys are to be based on population distribution grids rather than on a simple area based grid distribution, due to both the uneven population distribution and the variability on external dose rates throughout the Brazilian territory. (author)

  3. How do migratory species add ecosystem service value to wilderness? Calculating the spatial subsidies provided by protected areas

    Science.gov (United States)

    Lopez-Hoffman, Laura; Semmens, Darius J.; Diffendorfer, Jay

    2013-01-01

    Species that migrate through protected and wilderness areas and utilize their resources, deliver ecosystem services to people in faraway locations. The mismatch between the areas that most support a species and those areas where the species provides most benefits to society can lead to underestimation of the true value of protected areas such as wilderness. We present a method to communicate the “off-site” value of wilderness and protected areas in providing habitat to migratory species that, in turn, provide benefits to people in distant locations. Using northern pintail ducks (Anas acuta) as an example, the article provides a method to estimate the amount of subsidy – the value of the ecosystem services provided by a migratory species in one area versus the cost to support the species and its habitat elsewhere.

  4. SHOULDER RANGE OF MOTION, PITCH COUNT, AND INJURIES AMONG INTERSCHOLASTIC FEMALE SOFTBALL PITCHERS: A DESCRIPTIVE STUDY

    Science.gov (United States)

    Michener, Lori A.; Ellenbecker, Todd S.; Rauh, Mitchell J.

    2012-01-01

    Background/Purpose: Injury rates for softball players are similar to baseball players yet information regarding risk factors, pitching, and physical characteristics for high school windmill softball pitchers is limited. This information is needed to guide prevention, training, and rehabilitation efforts. The purpose of this study was to report descriptive data regarding the physical characteristics and pitching volume experienced by high school softball pitchers during one academic season. A secondary aim was to track and describe upper extremity injuries suffered by high school softball pitchers throughout the course of the 2009 season. Methods: Twelve uninjured female softball pitchers (13‐18y) from 5 Greenville, South Carolina high schools participated. Prior to the 2009 season, the pitchers' shoulder internal, external, total arc of rotation and horizontal adduction PROM was measured. During the 10‐week season, aggregate pitch counts (pitch volume) and occurrence of upper extremity injury were tracked for each pitcher. Results: Mean preseason internal, external, and total arc of rotation PROM was observed to be similar between the pitchers' dominant and non‐dominant shoulders. The PROM measures of horizontal abduction (HA) appear to demonstrate a side‐to‐side difference with less HA on the dominant arm of the pitchers who were examined. Subjects threw in an average of 10.1 games (±4.9) during the season. Six pitchers threw in 60% or more of the team's games and 3 of 12 pitchers pitched less than 25% of games. Pitchers averaged 61.8 pitches per game (±31.5) and 745.8 (±506.4) per season. Pitch count data did not appear to be different between injured and non‐injured pitchers. Conclusions: Knowledge of pitch volume can be used to prepare windmill softball pitchers for the seasonal stresses, guide establishment of goals when recovering from injury, or assist in training for an upcoming season. Further research is needed to examine larger samples of

  5. In search of the perfect wilderness. Anchoritism in Cistercian art and spirituality

    Directory of Open Access Journals (Sweden)

    Dariusz Tabor

    2016-12-01

    Full Text Available The anchoretic trend in Cistercian spirituality has always been the subject of many studies. Cistercian anchoritism has been analysed by researchers such as George Duby, Terryl Kinder, Janet Burton and Julie Krery, Mette Bruun and Emilia Jamroziak. Exordium parvum and Vita Sancti Bernardi are basic sources containing key information on the origins of the Cistercian order. They describe the departure of Robert of Molesme and his group as a journey to the wilderness (ad eremum in order to find better conditions for practising the rule of St. Benedict and following forefathers – Egyptian monks. Clairvaux II, Pontigny and Fontenay – first Burgundian churches of the Cistercians took form of a three-nave basilica with a transept (1130–1160. The temples were supposed to provide the best setting for contemplation. The so-called “Bernardine plan” was applied in the second generation of Cistercian churches, e.g. Fossanova, San Galgano, Casamari, Arabona, Haina (1148–1180. However, the plan was not the only architectural solution concerning Cistercian churches. There were also transept churches containing a presbytery culminated with a straight wall, surrounded with an ambulatory: Morimond, Ebrach, Ridaghshausen, Lubiąż; churches with an apsidal enclosure: Altzella, Sittich/Stiĉna,Valbuena, Huerta, Floran, Faleri or churches with multi-sided cathedral presbytery with an ambulatory and a circle of chapels: Ourscamp, Veruela, Poblet in the period from 1140 to 1180, Alcobaça, Vaucelle, Longpont, Royaumont, Varhem or Altenberg in the period from 1180 to 1240. Terryl Kinder and Megan Cassidy noticed the key factor shaping the significance of the Cistercian church space – the light. An important aspect of anchoritism is lectio divina, in which a monk finds himself in a kind of spiritual desert, facing the Word on his own. A consequence of such attitude in spiritual warfare as expressed in a number of miniatures depicting human struggle with a

  6. Is it possible to determine firearm calibre and shooting range from the examination of gunshot residue in close range gunshot wounds? An experimental study

    Directory of Open Access Journals (Sweden)

    Anisa Gradaščević

    2013-12-01

    Full Text Available Introduction: The aim of the study was determining the type of weapon and shooting distance depending on chemical analysis of inorganic gunshot residue from the skin gunshot wounds in experimental animals (pigs.Methods: Experimental study was conducted in order to determine components and their percentage in gunshot residue (GSR. In 60 samples, pig skin was shot by fi ring projectiles from four different weapons and from three different distances (contact wound and near contact wound from 5 cm and 10 cm. The methodology included determining the presence of inorganic material: antimony, barium, lead, nickel, zinc and copper in the skin and subcutaneous tissue using atomic absorption spectrophotometry (AAS.Results: Formula for determining weapon type was provided cutt-off points for different weapons, with 78.6% of original grouped cases being correctly classifi ed. Formula for determining weapon type was provided cutt-off points for different distances, with 58.9% of original grouped cases being correctly classified, which was slightly less reliable compared to weapon type discrimination analysis.Conclusion: The presented study showed that chemical analysis of GSR in entrance wound with AAS could be useful in determining the type of weapon, as well as the shooting distance, i.e. in our study, determiningwhether the wound is contact or near contact. This could be particularly useful in postmortally putrefi ed or charred bodies with gunshot wounds.

  7. Estimating Carbon Stocks Along Depressional Wetlands Using Ground Penetrating Radar (GPR) in the Disney Wilderness Preserve (Orlando, Florida)

    Science.gov (United States)

    McClellan, M. D.; Comas, X.; Wright, W. J.; Mount, G. J.

    2014-12-01

    Peat soils store a large fraction of the global carbon (C) in soil. It is estimated that 95% of carbon in peatlands is stored in the peat soil, while less than 5% occurs in the vegetation. The majority of studies related to C stocks in peatlands have taken place in northern latitudes leaving the tropical and subtropical latitudes clearly understudied. In this study we use a combination of indirect non-invasive geophysical methods (mainly ground penetrating radar, GPR) as well as direct measurements (direct coring) to calculate total C stocks within subtropical depressional wetlands in the Disney Wilderness Preserve (DWP, Orlando, FL). A set of three-dimensional (3D) GPR surveys were used to detect variability of the peat layer thickness and the underlying peat-sand mix layer across several depressional wetlands. Direct samples collected at selected locations were used to confirm depth of each interface and to estimate C content in the laboratory. Layer thickness estimated from GPR and direct C content were used to estimate total peat volume and C content for the entire depressional wetland. Through the use of aerial photos a relationship between surface area along the depressional wetlands and total peat thickness (and thus C content) was established for the depressions surveyed and applied throughout the entire preserve. This work shows the importance of depressional wetlands as critical contributors of the C budget at the DWP.

  8. A Pilot Study of the Normative Range of Overnight Urinary Free Cortisol Corrected for Creatinine in Children.

    Science.gov (United States)

    Wolthers, Ole D; Mersmann, Sabine; Dissanayake, Sanjeeva

    2018-04-01

    For more than a decade, urinary free cortisol corrected for creatinine (OUFCC) has been used to assess the systemic bioactivity of inhaled corticosteroids in children with asthma. Paediatric normative ranges, however, have not been established. The aim of the present study was to define a preliminary range for OUFCC in Tanner stage 1 children. A post hoc analysis was performed of 26 Tanner stage one children (aged 5-11 years) with mild asthma only requiring prn (pro re nata) treatment with short-acting β 2 -agonists, who participated in a 3-way cross-over knemometry study. The study comprised a run-in, two washout periods and three treatment periods (2 weeks each). Urine was collected at the end of each period. A normative range was derived using the 95% prediction interval for the geometric mean OUFCC, calculated from run-in and washout periods. Twenty-six children contributed 41 OUFCC values. The geometric mean OUFCC was 9.0 nmol/mmol (95% PI: 3.6, 22.7 nmol/mmol). The OUFCC preliminary normative range was 3.6 to 22.7 nmol/mmol in Tanner stage one children. A larger study in healthy children is warranted to confirm these findings and to assess potential differences in OUFCC across developmental stages and age groups, and by gender and race. 2013-004719-32, CLINICALTRIALS. NCT02063139.

  9. Ultrawideband Radio Ranging Studies

    National Research Council Canada - National Science Library

    Scholtz, Robert

    2003-01-01

    .... In addition, UWB propagation measurements were made in a shipboard environment to determine the difficulties in positioning using RF signals in a large metallic enclosure, and issues in sharing...

  10. VENUS Ranging Study

    Science.gov (United States)

    2014-12-01

    Majesté la Reine (en droit du Canada), telle que réprésentée par le ministre de la Défense nationale, 2014 Abstract The underwater acoustic propagation...50 km des capteurs sous-marins situés aux nœuds du réseau VENUS dont les données acoustiques et sismiques sont accessibles au public sur Internet...Southwest British Columbia, Geophysical Journal International , 170(2), 800–812. [15] Hamilton, E. L. (1979), Vp/Vs and Poisson’s ratios in marine

  11. The influences of working memory representations on long-range regression in text reading: An eye-tracking study

    Directory of Open Access Journals (Sweden)

    Teppei eTanaka

    2014-09-01

    Full Text Available The present study investigated the relationship between verbal and visuospatial working memory capacity and long-range regression (i.e., word relocation processes in reading. We analyzed eye movements during a whodunit task, in which readers were asked to answer a content question while original text was being presented. The eye movements were more efficient in relocating a target word when the target was at recency positions within the text than when it was at primacy positions. Furthermore, both verbal and visuospatial working memory capacity partly predicted the efficiency of the initial long-range regression. The results indicate that working memory representations have a strong influence at the first stage of long-range regression by driving the first saccade movement toward the correct target position, suggesting that there is a dynamic interaction between internal working memory representations and external actions during text reading.

  12. 3D Virtual Reality Applied in Tectonic Geomorphic Study of the Gombori Range of Greater Caucasus Mountains

    Science.gov (United States)

    Sukhishvili, Lasha; Javakhishvili, Zurab

    2016-04-01

    Gombori Range represents the southern part of the young Greater Caucasus Mountains and stretches from NW to SE. The range separates Alazani and Iori basins within the eastern Georgian province of Kakheti. The active phase of Caucasian orogeny started in the Pliocene, but according to alluvial sediments of Gombori range (mapped in the Soviet geologic map), we observe its uplift process to be Quaternary event. The highest peak of the Gombori range has an absolute elevation of 1991 m, while its neighboring Alazani valley gains only 400 m. We assume the range has a very fast uplift rate and it could trigger streams flow direction course reverse in Quaternary. To check this preliminary assumptions we are going to use a tectonic and fluvial geomorphic and stratigraphic approaches including paleocurrent analyses and various affordable absolute dating techniques to detect the evidence of river course reverses and date them. For these purposes we have selected river Turdo outcrop. The river itself flows northwards from the Gombori range and nearby region`s main city of Telavi generates 30-40 m high continuous outcrop along 1 km section. Turdo outcrop has very steep walls and requires special climbing skills to work on it. The goal of this particularly study is to avoid time and resource consuming ground survey process of this steep, high and wide outcrop and test 3D aerial and ground base photogrammetric modelling and analyzing approaches in initial stage of the tectonic geomorphic study. Using this type of remote sensing and virtual lab analyses of 3D outcrop model, we roughly delineated stratigraphic layers, selected exact locations for applying various research techniques and planned safe and suitable climbing routes for getting to the investigation sites.

  13. Response of lake chemistry to atmospheric deposition and climate in selected Class I wilderness areas in the western United States, 1993-2009

    Science.gov (United States)

    Mast, M. Alisa

    2011-01-01

    The U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Forest Service, Air Resource Management, conducted a study to evaluate long-term trends in lake-water chemistry for 64 high-elevation lakes in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming during 1993 to 2009. Understanding how and why lake chemistry is changing in mountain areas is essential for effectively managing and protecting high-elevation aquatic ecosystems. Trends in emissions, atmospheric deposition, and climate variables (air temperature and precipitation amount) were evaluated over a similar period of record. A main objective of the study was to determine if changes in atmospheric deposition of contaminants in the Rocky Mountain region have resulted in measurable changes in the chemistry of high-elevation lakes. A second objective was to investigate linkages between lake chemistry and air temperature and precipitation to improve understanding of the sensitivity of mountain lakes to climate variability.

  14. Stanley Cavell, Classical Hollywood and the Constitution of the Ordinary (With Notes on Billy Wilder

    Directory of Open Access Journals (Sweden)

    Tatjana Jukić

    2016-04-01

    Full Text Available When in his Tanner lectures Stanley Cavell sets out to define Ordinary Language Philosophy or – rather – to explain how it demarcates philosophy as such, he takes up psychoanalytic literary criticism in order to articulate the terms of this task. Yet the constitution of the ordinary, in Cavell, is never quite accessed from within psychoanalysis-cum-literature alone; instead, it takes another relation, that of psychoanalysis and literature to classical Hollywood, for Cavell to address the ordinary in terms of its constitution. I propose to discuss this complex using two films by Billy Wilder as a passageway to Cavell’s analytic procedure.

  15. Freedom of speech versus freedom of religion? The case of Dutch politician Geert Wilders

    OpenAIRE

    Howard, Erica

    2017-01-01

    Dutch right-wing politician Geert Wilders has already been prosecuted once for incitement to hatred and group defamation over remarks and a film criticising Islam and comparing the Quran to Hitler’s Mein Kampf. He was acquitted, but now faces another criminal trial on the same charges concerning remarks he made in March 2014 about ‘fewer Moroccans’. This Article examines Wilders’ expressions which led to both prosecutions. The case law of the European Court of Human Rights on freedom of expre...

  16. Status and understanding of groundwater quality in the Northern Coast Ranges study unit, 2009: California GAMA Priority Basin Project

    Science.gov (United States)

    Mathany, Timothy M.; Belitz, Kenneth

    2015-01-01

    Groundwater quality in the 633-square-mile (1,639-square-kilometer) Northern Coast Ranges (NOCO) study unit was investigated as part of the Priority Basin Project (PBP) of the Groundwater Ambient Monitoring and Assessment (GAMA) Program and the U.S. Geological Survey (USGS) National Water-Quality Assessment Program. The study unit is composed of two study areas (Interior Basins and Coastal Basins) and is located in northern California in Napa, Sonoma, Lake, Colusa, Mendocino, Glenn, Humboldt, and Del Norte Counties. The GAMA-PBP is being conducted by the California State Water Resources Control Board in collaboration with the USGS and the Lawrence Livermore National Laboratory.

  17. Thinking globally and acting locally in Mindanao: Supporting the delicate balance of future sustainability in South-East Asian wilderness as well as rural areas

    International Nuclear Information System (INIS)

    Richards, C

    2014-01-01

    Although models of future sustainability often talk about effectively balancing economic, social and environmental imperatives or factors, in practice this typically remains an elusive ideal. This paper explores the exemplary possibilities but also dilemmas of a proposed initiative in the resource-rich but under-developed Filippino island province of Mindanao to achieve such a delicate balance in practice. This initiative by Raintrust Sustainable Ventures' proposes to link foreign investment in agricultural development to both the social advancement of local tribal peoples and the protection of large amounts of remaining wilderness areas. Such a case study provides an exemplary basis for discussing the challenge of achieving social and environmental as well as economic domains of 'future sustainability'. The crucial supporting role of information and geospatial technologies in the Raintrust plan will also be discussed

  18. 3-Dimensional Physiologic Postural Range of the Mandible: A Computerized-Assisted Technique—A Case Study

    Directory of Open Access Journals (Sweden)

    Todd Shewman

    2013-01-01

    Full Text Available Previous studies demonstrated that while the mandible assumes its resting position in space, antagonistic muscles should assume minimal muscle activity within a spatial range. This zone of mandibular rest has been mapped using physiologic parameters of muscle activity and incisal spatial kinematics. This case study expands on previous research by monitoring incisal and posterior jaw position and includes lateral pterygoid muscle activity, thus allowing for determining the spatial range including additional relevant coordinates and muscle activity. Four positions were evaluated: a maximum physiologic open position, a maximum physiologic closed position, physiologic rest position, and maximum physiologic protrusion position. Within the physiologic zone of rest formed by these 4 positions, the vertical and anterior borders of the envelope of function may be documented for the incisal and posterior mandible in true 3-dimensional fashion to assist the clinician in determining a physiologic interocclusal freeway space and vertical dimension of occlusion. Advantages and limitations are discussed.

  19. Distance learning in the arctic wilderness of northeast Greenland

    DEFF Research Database (Denmark)

    Langebæk, Rikke

    2011-01-01

    ABSTRACT In North East Greenland, the Danish Sirius Sledge Patrol conducts long-range patrolling in pairs of two soldiers and a team of sled dogs. Trips last 4 months or more and soldiers have no outside human contact. Each year seven new soldiers are selected to undergo seven months training bef...

  20. The importance of wilderness landscape Analysis in development planning schemes for national parks, with special reference to the Mountain Zebra National Park

    Directory of Open Access Journals (Sweden)

    W. van Riet

    1977-12-01

    The Wilderness Act of September 1964, of the United States of America, states that "... wilderness, in contrast with those areas where man and his own works dominate the landscape, is hereby recognised as an area where the earth and its community of life are not influenced by man and where man himself is a visitor who does not remain55 (Nash 1967. The Act also states that a wilderness "... must retain its primeval character and influence and that it must be protected and managed in such a way that it appears to have been effected primarily by the forces of nature.”

  1. Analysis of long- and short-range contribution to adhesion work in cardiac fibroblasts: An atomic force microscopy study

    Energy Technology Data Exchange (ETDEWEB)

    Sbaizero, O., E-mail: sbaizero@units.it [Department of Engineering and Architecture, University of Trieste (Italy); University of Colorado Cardiovascular Institute, University of Colorado Denver, Aurora (United States); DelFavero, G. [Department of Engineering and Architecture, University of Trieste (Italy); Martinelli, V. [International Center for Genetic Engineering and Biotechnology, Trieste (Italy); Long, C.S.; Mestroni, L. [University of Colorado Cardiovascular Institute, University of Colorado Denver, Aurora (United States)

    2015-04-01

    Atomic force microscopy (AFM) for single-cell force spectroscopy (SCFS) and Poisson statistic were used to analyze the detachment work recorded during the removal of gold-covered microspheres from cardiac fibroblasts. The effect of Cytochalasin D, a disruptor of the actin cytoskeleton, on cell adhesion was also tested. The adhesion work was assessed using a Poisson analysis also derived from single-cell force spectroscopy retracting curves. The use of Poisson analysis to get adhesion work from AFM curves is quite a novel method, and in this case, proved to be effective to study the short-range and long-range contributions to the adhesion work. This method avoids the difficult identification of minor peaks in the AFM retracting curves by creating what can be considered an average adhesion work. Even though the effect of actin depolymerisation is well documented, its use revealed that control cardiac fibroblasts (CT) exhibit a work of adhesion at least 5 times higher than that of the Cytochalasin treated cells. However, our results indicate that in both cells short-range and long-range contributions to the adhesion work are nearly equal and the same heterogeneity index describes both cells. Therefore, we infer that the different adhesion behaviors might be explained by the presence of fewer membrane adhesion molecules available at the AFM tip–cell interface under circumstances where the actin cytoskeleton has been disrupted. - Highlights: • AFM force–deformation curve was used to characterize the cardiac fibroblast adhesion behavior. • The amount and nature of adhesion were assessed using a Poisson analysis applied to the AFM curve. • The work of adhesion for control cells was about four times higher than that of the Cyt-D treated cells. • Short- and long-range contributions to adhesion are nearly equal for both control and treated cells.

  2. Ethnobotanical study of wound healing herbs among the tribal communities in northern himalaya ranges district Abbottabad, Pakistan

    International Nuclear Information System (INIS)

    Abbasi, A.M.; Khan, M.A.; Ahmad, M.; Qureshi, R.; Arshad, M.; Jahan, S.; Zafar, M.; Sultan, S.

    2010-01-01

    The present paper reports therapeutic uses of medicinal plants for wounds healing by the tribal communities of Northern Himalayan Range, district Abbottabad which was recorded during January 2007 to April 2009. A total of 27 plant species belonging to 23 families are identified which are being used by the people of the study area. One hundred informants of different age (35 to 90 years old) were interviewed to extract ethno medicinal data using semi-structured questionnaire. Present study provides baseline data on wound healing properties of native plants that can be exploited by pharmaceutical industry for screening new active compounds. (author)

  3. Study of necking stability in tension test of zircaloy-2, on range from 170 0 C to 620 0 C

    International Nuclear Information System (INIS)

    Okuda, M.Y.

    1975-01-01

    The objective of this work is to study necking behavior of Zircaloy-2 in a tension test in which the temperature range varies from 170 0 C to 620 0 C by means of a model. This model provides strain rate variations in the beginning of necking and the parameters in the / necking stability. A new parameter Ψ is presented which permits necking / stability description in metals by means of a simple tension test. It is also proceeded a behavioral study of ε versus ε curve after necking formation. (author)

  4. Damage growth in Si during self-ion irradiation: A study of ion effects over an extended energy range

    International Nuclear Information System (INIS)

    Holland, O.W.; El-Ghor, M.K.; White, C.W.

    1989-01-01

    Damage nucleation/growth in single-crystal Si during ion irradiation is discussed. For MeV ions, the rate of growth as well as the damage morphology are shown to vary widely along the track of the ion. This is attributed to a change in the dominant, defect-related reactions as the ion penetrates the crystal. The nature of these reactions were elucidated by studying the interaction of MeV ions with different types of defects. The defects were introduced into the Si crystal prior to high-energy irradiation by self-ion implantation at a medium energy (100 keV). Varied damage morphologies were produced by implanting different ion fluences. Electron microscopy and ion-channeling measurements, in conjunction with annealing studies, were used to characterize the damage. Subtle changes in the predamage morphology are shown to result in markedly different responses to the high-energy irradiation, ranging from complete annealing of the damage to rapid growth. These divergent responses occur over a narrow range of dose (2--3 times 10 14 cm -2 ) of the medium-energy ions; this range also marks a transition in the growth behavior of the damage during the predamage implantation. A model is proposed which accounts for these observations and provides insight into ion-induced growth of amorphous layers in Si and the role of the amorphous/crystalline interface in this process. 15 refs, 9 figs

  5. Evaluation of different ranges of LH:FSH ratios in polycystic ovarian syndrome (PCOS) - Clinical based case control study.

    Science.gov (United States)

    Malini, N A; Roy George, K

    2018-05-01

    Polycystic ovary syndrome (PCOS) is a highly prevalent endocrine and metabolic disorder among reproductive aged women, leading to infertility. One of the common clinical manifestations in PCOS is that there is a difference in the range of LH production in different case of PCOS and accordingly variability in LH:FSH ratio was observed. The aim of the present study was to evaluate different ranges of LH:FSH ratios in PCOS. In this cross sectional study, a consecutive series of 745 women (aged 28.11 ± 0.2) who were subjected to infertility treatment at specialist infertility clinics in central Travancore region were considered. About 50 healthy females (aged 27.58 ± 0.4) with regular menstrual cycles were regarded as control. The data were collected from hospital records using subject's written informed consent. PCOS patients were observed to have different ranges of LH:FSH ratios from PCOS. Copyright © 2018 Elsevier Inc. All rights reserved.

  6. Evolution of short range order in Ar: Liquid to glass and solid transitions-A computational study

    Science.gov (United States)

    Shor, Stanislav; Yahel, Eyal; Makov, Guy

    2018-04-01

    The evolution of the short range order (SRO) as a function of temperature in a Lennard-Jones model liquid with Ar parameters was determined and juxtaposed with thermodynamic and kinetic properties obtained as the liquid was cooled (heated) and transformed between crystalline solid or glassy states and an undercooled liquid. The Lennard-Jones system was studied by non-equilibrium molecular dynamics simulations of large supercells (approximately 20000 atoms) rapidly cooled or heated at selected quenching rates and at constant pressure. The liquid to solid transition was identified by discontinuities in the atomic volume and molar enthalpy; the glass transition temperature range was identified from the temperature dependence of the self-diffusion. The SRO was studied within the quasi-crystalline model (QCM) framework and compared with the Steinhardt bond order parameters. Within the QCM it was found that the SRO evolves from a bcc-like order in the liquid through a bct-like short range order (c/a=1.2) in the supercooled liquid which persists into the glass and finally to a fcc-like ordering in the crystalline solid. The variation of the SRO that results from the QCM compares well with that obtained with Steinhardt's bond order parameters. The hypothesis of icosahedral order in liquids and glasses is not supported by our results.

  7. Development of input data layers for the FARSITE fire growth model for the Selway-Bitterroot Wilderness Complex, USA

    Science.gov (United States)

    Robert E. Keane; Janice L. Garner; Kirsten M. Schmidt; Donald G. Long; James P. Menakis; Mark A. Finney

    1998-01-01

    Fuel and vegetation spatial data layers required by the spatially explicit fire growth model FARSITE were developed for all lands in and around the Selway-Bitterroot Wilderness Area in Idaho and Montana. Satellite imagery and terrain modeling were used to create the three base vegetation spatial data layers of potential vegetation, cover type, and structural stage....

  8. Book Review: And then there were none: The demise of Desert Bighorn Sheep in the Pusch Ridge Wilderness

    Science.gov (United States)

    Cain, James W.

    2018-01-01

    And Then There Were None: The Demise of Desert Bighorn Sheep in the Pusch Ridge Wilderness. Paul R.Krausman. 2017. The University of New Mexico Press, Albuquerque, New Mexico, USA. 248 pp. $65.00 hardcover. ISBN 978‐0‐8263‐5785‐4.

  9. Screening procedure to evaluate effects of air pollution on Eastern Region wildernesses cited as Class I air quality areas.

    Science.gov (United States)

    Mary Beth Adams; Dale S. Nichols; Anthony C. Federer; Keith F. Jensen; Harry Parrott

    1991-01-01

    The USDA Forest Service's Eastern Region manages eight wilderness areas that have been designated as Class I air quality areas by the Federal Clean Air Act. As part of this legislation, Federal land managers are required to consult with air pollution regulators on the potential impacts of proposed air pollution emissions--including phytotoxic gases and acidic...

  10. Effectiveness of a confinement strategy in reducing pack stock impacts at campsites in the Selway-Bitterroot Wilderness, Idaho

    Science.gov (United States)

    David R. Spildie; David N. Cole; Sarah C. Walker

    2000-01-01

    In 1993, a management program was initiated in the Seven Lakes Basin in the Selway-Bitterroot Wilderness to bring high levels of campsite impact into compliance with management standards. The core of the strategy involved confining use, particularly by stock groups, and restoring certain campsites and portions of campsites. In just five years, campsite impacts were...

  11. Effects of low intensity prescribed fires on ponderosa pine forests in wilderness areas of Zion National Park, Utah

    Science.gov (United States)

    Henry V. Bastian

    2001-01-01

    Vegetation and fuel loading plots were monitored and sampled in wilderness areas treated with prescribed fire. Changes in ponderosa pine (Pinus ponderosa) forest structure tree species and fuel loading are presented. Plots were randomly stratified and established in burn units in 1995. Preliminary analysis of nine plots 2 years after burning show litter was reduced 54....

  12. The Effect of Wilderness Therapy on Adolescents' Cognitive Autonomy and Self-Efficacy: Results of a Non-Randomized Trial

    Science.gov (United States)

    Margalit, Daniella; Ben-Ari, Amichai

    2014-01-01

    Background: Adolescents participate in decision-making processes involving risky behaviors. Management of these important decisions may be promoted by enhancing adolescents' self-efficacy beliefs and cognitive autonomy. Objective: In order to elucidate the value of wilderness therapy to the successful management of decision making processes among…

  13. Creating a commodified wilderness: Tourism, private game farming, and 'third nature' landscapes in KwaZulu-Natal

    NARCIS (Netherlands)

    Brooks, S.; Spierenburg, M.J.; Brakel, L.; Kolk, A.; Lukhozi, K.B.

    2011-01-01

    This article explores contemporary cultural geographies and underlying histories of change on private land in post-apartheid South Africa. Its focus is the expansion of wildlife-based tourism and related forms of commodified wilderness consumption in KwaZulu-Natal province. The article explores the

  14. Expansion of the wilderness values scale with three sub-scales: Personal maintenance, expression and learning, and societal maintenance

    Science.gov (United States)

    Rudy M. Schuster; Ken Cordell; Gary T. Green

    2007-01-01

    The purpose of this research was to expand the wilderness value scale administered in the 1994 and 2000 versions of the National Survey on Recreation and the Environment using questions included in the 2003 NSRE. A data set of 1,900 cases was randomly split in half. Validity of the additional questions was tested using principal component analysis, a confirmatory...

  15. Familial influences on the full range of variability in attention and activity levels during adolescence: A longitudinal twin study.

    Science.gov (United States)

    Peng, Chun-Zi; Grant, Julia D; Heath, Andrew C; Reiersen, Angela M; Mulligan, Richard C; Anokhin, Andrey P

    2016-05-01

    To investigate familial influences on the full range of variability in attention and activity across adolescence, we collected maternal ratings of 339 twin pairs at ages 12, 14, and 16, and estimated the transmitted and new familial influences on attention and activity as measured by the Strengths and Weaknesses of Attention-Deficit/Hyperactivity Disorder Symptoms and Normal Behavior Scale. Familial influences were substantial for both traits across adolescence: genetic influences accounted for 54%-73% (attention) and 31%-73% (activity) of the total variance, and shared environmental influences accounted for 0%-22% of the attention variance and 13%-57% of the activity variance. The longitudinal stability of individual differences in attention and activity was largely accounted for by familial influences transmitted from previous ages. Innovations over adolescence were also partially attributable to familial influences. Studying the full range of variability in attention and activity may facilitate our understanding of attention-deficit/hyperactivity disorder's etiology and intervention.

  16. A theoretical study on directivity control of multiple-loudspeaker system with a quadrupole radiation pattern in low frequency range

    Science.gov (United States)

    Irwansyah, Kuse, Naoyuki; Usagawa, Tsuyoshi

    2017-08-01

    Directivity pattern of an ordinary loudspeaker becomes more directive at higher frequencies. However, because a single loudspeaker tends to radiate uniformly in all directions at low frequencies, reverberation from surrounding building walls may affect speech intelligibility when installing a multiple-loudspeaker system at crossroads. As an alternative, a sharply directive sound source is recommended to be used, but in many cases the directivity of an ordinary loudspeaker is less sharp at lower frequencies. Therefore, in order to overcome such a limitation, this paper discusses the possibility of using four loudspeakers under active control to realize a quadrupole radiation pattern in low frequency range. In this study, the radiation pattern of a primary loudspeaker and three secondary loudspeakers has been modelled. By placing the loudspeakers close together in the direction of 0°, 90°, 180°, and 270°, it was theoretically demonstrated that a quadrupole radiation pattern can be shaped in the target frequency range up to 600 Hz by simply controlling the directivity in three of four directions which are 45°, 135°, 225°, and 315°. Although, the radiation pattern model is far from realistic configurations and conditions, it is possible to realize a quadrupole radiation pattern in the low frequency range.

  17. Direct quantification of PM2.5 fossil and biomass carbon within the Northern Front Range Air Quality Study's domain

    International Nuclear Information System (INIS)

    Klinedinst, D.B.; Currie, L.A.

    1999-01-01

    Radiocarbon ( 14 C) analyses of PM 2.5 (particulate matter with an aerodynamic diameter of 2.5 microm or less) of both ambient and source samples from the Northern Front Range Air Quality Study (NFRAQS) in Colorado were performed. The 14 C analyses were undertaken to provide direct fossil vs modern (biomass) carbon source discrimination data for a subset of summer and winter 1996--1997 samples collected within the Denver metropolitan area. Samples were prepared for 14 C accelerator mass spectrometry measurements using techniques specially developed for small samples, i.e., lt100 μg C. For the days and sampling periods analyzed the median and interquartile range of the winter blank corrected fraction of modern carbon was 23% (16--34%) at Welby and 27% (25--37%) at Brighton. The summer samples exhibited a more mixed signature with a median and interquartile range of 47% (9--70%). Source samples yielded 14 C signatures consistent with expectation. The authors conclude fossil-derived sources contribute substantially in both seasons and at both locations; however, the biomass carbon component dominates episodically in the summer

  18. Long-range transport and multimedia partitioning of semivolatile organic compounds: a case study on two modern agrochemicals

    Energy Technology Data Exchange (ETDEWEB)

    Lammel, G.; Feichter, J. [Max-Planck-Institut fuer Meteorologie, Hamburg (Germany); Leip, A. [Hamburg Univ. (Germany). Meteorologisches Inst.

    2001-08-01

    The global environmental fate of two modern pesticides was studied using a multimedia model based on a three-dimensional atmosphere general circulation model. The emissions are predicted dynamically based on agricultural application inventories. The insecticide methyl parathion, when assuming properties at the high mobility end of the respective data uncertainties, was found to be distributed on continental and even global scales. This finding implies that based on present knowledge one cannot exclude that methyl parathion reaches regions as far from the sources as e.g. the Arctic. Two scenarios of the environmental cycling of the herbicide atrazine were studied which reflect a lower and an upper estimate of the substance' mobility. Atrazine largely remains in the source (application) regions and the neighbouring seas. But also atrazine seems to have an albeit limited potential for long-range transport. The findings on substance mobilities are quantified by indicators which address spatial range in the zonal direction in individual media. The seasonal variability of the total environmental burden of both pesticides is governed by the degradation in soil and vegetation which together host 73% of methyl parathion and 90-99% of atrazine. Also, the cycling between compartments was studied. Methyl parathion undergoes more deposition and re-emission cycles than atrazine, a characteristics of the environmental fate of semivolatile substances. Persistence is addressed by determination of global total environmental decay times during periods without introduction of new substance into the environment. These are in the range 4-7 months. It is found that the seasonal variability of persistence is pronounced. (orig.)

  19. Statistical Studies of the Electric Breakdown in Nitrogen in the Duration Range of 3 ms-60 min

    Science.gov (United States)

    Gorokhov, V. V.; Karelin, V. I.; Perminov, A. V.; Repin, P. B.

    2018-05-01

    The statistical characteristics of an electric breakdown in the nitrogen in the spike (cathode)-plane gap in the duration range of (3 × 10-3)-3600 s at voltages close to a static breakdown have been studied. It has been found that a probability of a gap breakdown is nonmonotonously distributed over time. The presence of maxima in the probability distribution confirms a contribution of some processes that both stimulate and suppress a breakdown. The typical times of the processes are 30 ms, 10-1 s, and 300 s.

  20. Reproducibility of range of motion and muscle strength measurements in patients with hip osteoarthritis – an interrater study

    DEFF Research Database (Denmark)

    Poulsen, Erik; Christensen, Henrik Wulff; Penny, Jeannette Østergaard

    2012-01-01

    ABSTRACT: BACKGROUND: Assessment of range of motion (ROM) and muscle strength is fundamental in the clinical diagnosis of hip osteoarthritis (OA) but reproducibility of these measurements has mostly involved clinicians from secondary care and has rarely reported agreement parameters. Therefore......, the primary objective of the study was to determine the inter-rater reproducibility of ROM and muscle strength measurements. Furthermore, the reliability of the overall assessment of clinical hip OA was evaluated. Reporting is in accordance with proposed guidelines for the reporting of reliability...... differentiate between hips with or without osteoarthritis....

  1. Field study of alpha characterization of a D ampersand D site using long-range alpha detectors

    International Nuclear Information System (INIS)

    Rawool-Sullivan, M.W.; Allander, K.S.; Bounds, J.A.; Koster, J.E.; MacArthur, D.W.; Sprouse, L.L.; Stout, D.; Vaccarella, J.A.; Vu, T.Q.

    1994-01-01

    A successful and cost-effective D ampersand D effort relies upon an accurate, real-time, in situ, and non-destructive method of characterization of contamination both before and after the decontamination process. Detector systems based on long-range alpha detection (LRAD) technology meet these criteria. Currently, LANL is in the process of investigating, designing, or building various surface monitors, various pipe monitors, and glove-box monitors. This paper describes the field studies conducted using detectors based on LRAD technology

  2. Temperature-dependent dielectric function of germanium in the UV–vis spectral range: A first-principles study

    International Nuclear Information System (INIS)

    Yang, J.Y.; Liu, L.H.; Tan, J.Y.

    2014-01-01

    The study of temperature dependence of thermophysical parameter dielectric function is key to understanding thermal radiative transfer in high-temperature environments. Limited by self-radiation and thermal oxidation, however, it is difficult to directly measure the high-temperature dielectric function of solids with present experimental technologies. In this work, we implement two first-principles methods, the ab initio molecular dynamics (AIMD) and density functional perturbation theory (DFPT), to study the temperature dependence of dielectric function of germanium (Ge) in the UV–vis spectral range in order to provide data of high-temperature dielectric function for radiative transfer study in high-temperature environments. Both the two methods successfully predict the temperature dependence of dielectric function of Ge. Moreover, the good agreement between the calculated results of the AIMD approach and experimental data at 825 K enables us to predict the high-temperature dielectric function of Ge with the AIMD method in the UV–vis spectral range. - Highlights: • The temperature dependence of dielectric function of germanium (Ge) is investigated with two first-principles methods. • The temperature effect on dielectric function of Ge is discussed. • The high-temperature dielectric function of Ge is predicted

  3. Reaction CH3 + OH studied over the 294-714 K temperature and 1-100 bar pressure ranges.

    Science.gov (United States)

    Sangwan, Manuvesh; Chesnokov, Evgeni N; Krasnoperov, Lev N

    2012-08-30

    Reaction of methyl radicals with hydroxyl radicals, CH(3) + OH → products (1) was studied using pulsed laser photolysis coupled to transient UV-vis absorption spectroscopy over the 294-714 K temperature and 1-100 bar pressure ranges (bath gas He). Methyl radicals were produced by photolysis of acetone at 193.3 nm. Hydroxyl radicals were generated in reaction of electronically excited oxygen atoms O((1)D), produced in the photolysis of N(2)O at 193.3 nm, with H(2)O. Temporal profiles of CH(3) were recorded via absorption at 216.4 nm using xenon arc lamp and a spectrograph; OH radicals were monitored via transient absorption of light from a dc discharge H(2)O/Ar low pressure resonance lamp at ca. 308 nm. The absolute intensity of the photolysis light inside the reactor was determined by an accurate in situ actinometry based on the ozone formation in the presence of molecular oxygen. The results of this study indicate that the rate constant of reaction 1 is pressure independent within the studied pressure and temperature ranges and has slight negative temperature dependence, k(1) = (1.20 ± 0.20) × 10(-10)(T/300)(-0.49) cm(3) molecule(-1) s(-1).

  4. Polycyclic aromatic hydrocarbons - fate and long-range atmospheric transport studied using a global model, EMAC-SVOC

    Science.gov (United States)

    Octaviani, Mega; Tost, Holger; Lammel, Gerhard

    2017-04-01

    Polycyclic aromatic hydrocarbons (PAHs) are emitted by incomplete combustion from fossil fuel, vehicles, and biomass burning. They may persist in environmental compartments, pose a health hazard and may bio accumulate along food chains. The ECHAM/MESSy Atmospheric Chemistry (EMAC) model had been used to simulate global tropospheric, stratospheric chemistry and climate. In this study, we improve the model to include simulations of the transport and fate of semi-volatile organic compounds (SVOC). The EMAC-SVOC model takes into account essential environmental processes including gas-particle partitioning, dry and wet deposition, chemical and bio-degradation, and volatilization from sea surface, soils, vegetation, and snow. The model was evaluated against observational data in the Arctic, mid-latitudes, and tropics, and further applied to study total environmental lifetime and long-range transport potential (LRTP) of PAHs. We selected four compounds for study, spanning a wide range of volatility, i.e., phenanthrene, fluoranthene, pyrene, and benzo[a]pyrene. Several LRTP indicators were investigated, including the Arctic contamination potential, meridional spreading, and zonal and meridional fluxes to remote regions.

  5. Groundwater-quality data in the northern Coast Ranges study unit, 2009: Results from the California GAMA Program

    Science.gov (United States)

    Mathany, Timothy M.; Dawson, Barbara J.; Shelton, Jennifer L.; Belitz, Kenneth

    2011-01-01

    Groundwater quality in the 633-square-mile Northern Coast Ranges (NOCO) study unit was investigated by the U.S. Geological Survey (USGS) from June to November 2009, as part of the California State Water Resources Control Board (SWRCB) Groundwater Ambient Monitoring and Assessment (GAMA) Program's Priority Basin Project (PBP) and the U.S. Geological Survey National Water-Quality Assessment Program (NAWQA). The GAMA-PBP was developed in response to the California Groundwater Quality Monitoring Act of 2001 and is being conducted in collaboration with the SWRCB and Lawrence Livermore National Laboratory (LLNL). The NOCO study unit was the thirtieth study unit to be sampled as part of the GAMA-PBP.

  6. Addressing the targeting range of the ABILHAND-56 in relapsing-remitting multiple sclerosis: A mixed methods psychometric study.

    Science.gov (United States)

    Cleanthous, Sophie; Strzok, Sara; Pompilus, Farrah; Cano, Stefan; Marquis, Patrick; Cohan, Stanley; Goldman, Myla D; Kresa-Reahl, Kiren; Petrillo, Jennifer; Castrillo-Viguera, Carmen; Cadavid, Diego; Chen, Shih-Yin

    2018-01-01

    ABILHAND, a manual ability patient-reported outcome instrument originally developed for stroke patients, has been used in multiple sclerosis clinical trials; however, psychometric analyses indicated the measure's limited measurement range and precision in higher-functioning multiple sclerosis patients. The purpose of this study was to identify candidate items to expand the measurement range of the ABILHAND-56, thus improving its ability to detect differences in manual ability in higher-functioning multiple sclerosis patients. A step-wise mixed methods design strategy was used, comprising two waves of patient interviews, a combination of qualitative (concept elicitation and cognitive debriefing) and quantitative (Rasch measurement theory) analytic techniques, and consultation interviews with three clinical neurologists specializing in multiple sclerosis. Original ABILHAND was well understood in this context of use. Eighty-two new manual ability concepts were identified. Draft supplementary items were generated and refined with patient and neurologist input. Rasch measurement theory psychometric analysis indicated supplementary items improved targeting to higher-functioning multiple sclerosis patients and measurement precision. The final pool of Early Multiple Sclerosis Manual Ability items comprises 20 items. The synthesis of qualitative and quantitative methods used in this study improves the ABILHAND content validity to more effectively identify manual ability changes in early multiple sclerosis and potentially help determine treatment effect in higher-functioning patients in clinical trials.

  7. A study of self-consistent Hartree-Fock plus Bardeen-Cooper-Schrieffer calculations with finite-range interactions

    Science.gov (United States)

    Anguiano, M.; Lallena, A. M.; Co', G.; De Donno, V.

    2014-02-01

    In this work we test the validity of a Hartree-Fock plus Bardeen-Cooper-Schrieffer model in which a finite-range interaction is used in the two steps of the calculation by comparing the results obtained to those found in fully self-consistent Hartree-Fock-Bogoliubov calculations using the same interaction. Specifically, we consider the Gogny-type D1S and D1M forces. We study a wide range of spherical nuclei, far from the stability line, in various regions of the nuclear chart, from oxygen to tin isotopes. We calculate various quantities related to the ground state properties of these nuclei, such as binding energies, radii, charge and density distributions, and elastic electron scattering cross sections. The pairing effects are studied by direct comparison with the Hartree-Fock results. Despite its relative simplicity, in most cases, our model provides results very close to those of the Hartree-Fock-Bogoliubov calculations, and it reproduces the empirical evidence of pairing effects rather well in the nuclei investigated.

  8. Special offer-7 days fly and drive Antarctica: The role of wilderness protection in deciding whether (semi) permanent tourist facilities in Antarctica should be prohibited

    Science.gov (United States)

    Kees Bastmeijer

    2007-01-01

    Antarctica is often described as one of the world’s last wildernesses. Since 1990, tourism to this wilderness is developing rapidly. In a period of 15 years, the number of tourists that make landings in Antarctica has increased from 2,500 (1990/91) to more than 23,000 (2004/05). The diversity of tourist activities is also increasing. The 1991 Protocol on Environmental...

  9. A study of the electromagnetic shielding mechanisms in the GHz frequency range of graphene based composite layers

    Energy Technology Data Exchange (ETDEWEB)

    Drakakis, E. [Electrical Engineering Department, School of Engineering, Technological Educational Institute of Crete, Heraklion (Greece); Kymakis, E. [Electrical Engineering Department, School of Engineering, Technological Educational Institute of Crete, Heraklion (Greece); Center of Materials Technology and Photonics, School of Engineering, Technological Educational Institute of Crete, Heraklion (Greece); Tzagkarakis, G.; Louloudakis, D.; Katharakis, M. [Center of Materials Technology and Photonics, School of Engineering, Technological Educational Institute of Crete, Heraklion (Greece); Kenanakis, G. [Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas, Heraklion (Greece); Suchea, M.; Tudose, V. [Center of Materials Technology and Photonics, School of Engineering, Technological Educational Institute of Crete, Heraklion (Greece); Chemistry Faculty, “Al.I.Cuza” University of Iasi, Iasi (Romania); Koudoumas, E., E-mail: koudoumas@staff.teicrete.gr [Electrical Engineering Department, School of Engineering, Technological Educational Institute of Crete, Heraklion (Greece); Center of Materials Technology and Photonics, School of Engineering, Technological Educational Institute of Crete, Heraklion (Greece)

    2017-03-15

    Highlights: • Optimum paint contents should be chosen so that homogeneous and uniform nanocomposite layers exist exhibiting effective electromagnetic shielding. • The electromagnetic shielding in the frequency range studied comes mainly from absorption and increases with frequency. • Reflection reduces with increasing frequency, the decrease rate being smaller than that of the increase in absorption. • The shielding efficiency depends on both conductivity and thickness, the first dependence being more pronounced. - Abstract: We report on the mechanisms of the electromagnetic interference shielding effect of graphene based paint like composite layers. In particular, we studied the absorption and reflection of electromagnetic radiation in the 4–20 GHz frequency of various dispersions employing different amounts of graphene nanoplatelets, polyaniline, and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), special attention given on the relative contribution of each process in the shielding effect. Moreover, the influence of the composition, the thickness and the conductivity of the composite layers on the electromagnetic shielding was also examined.

  10. A study of the electromagnetic shielding mechanisms in the GHz frequency range of graphene based composite layers

    International Nuclear Information System (INIS)

    Drakakis, E.; Kymakis, E.; Tzagkarakis, G.; Louloudakis, D.; Katharakis, M.; Kenanakis, G.; Suchea, M.; Tudose, V.; Koudoumas, E.

    2017-01-01

    Highlights: • Optimum paint contents should be chosen so that homogeneous and uniform nanocomposite layers exist exhibiting effective electromagnetic shielding. • The electromagnetic shielding in the frequency range studied comes mainly from absorption and increases with frequency. • Reflection reduces with increasing frequency, the decrease rate being smaller than that of the increase in absorption. • The shielding efficiency depends on both conductivity and thickness, the first dependence being more pronounced. - Abstract: We report on the mechanisms of the electromagnetic interference shielding effect of graphene based paint like composite layers. In particular, we studied the absorption and reflection of electromagnetic radiation in the 4–20 GHz frequency of various dispersions employing different amounts of graphene nanoplatelets, polyaniline, and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), special attention given on the relative contribution of each process in the shielding effect. Moreover, the influence of the composition, the thickness and the conductivity of the composite layers on the electromagnetic shielding was also examined.

  11. Clonidine as an adjunct to intravenous regional anesthesia: A randomized, double-blind, placebo-controlled dose ranging study

    Directory of Open Access Journals (Sweden)

    Clarence S Ivie

    2011-01-01

    Full Text Available Background : The addition of clonidine to lidocaine intravenous regional anesthesia (IVRA has been previously reported to improve postoperative analgesia in patients undergoing upper extremity surgery. Our objective was to perform a dose ranging study in order to determine the optimal dose of clonidine used with lidocaine in IVRA. Design & Setting : We performed a double-blinded randomized placebo-controlled study with 60 patients scheduled for elective endoscopic carpal tunnel release under IVRA with 50 ml lidocaine 0.5%. University-affiliated outpatient surgery center. Data collected in operating rooms, recovery room, and by telephone after discharge from surgery center. Materials & Methods : Sixty adult ASA I or II patients undergoing outpatient endoscopic carpal tunnel release under intravenous regional anesthesia.Patients were randomized into five study groups receiving different doses of clonidine in addition to 50 ml 0.5% lidocaine in their IVRA. Group A received 0 mcg/kg, group B 0.25 mcg/kg, group C 0.5 mcg/kg, group D 1.0 mcg/kg and group E 1.5 mcg/kg of clonidine.Intraoperative fentanyl, recovery room pain scores, time to first postsurgical analgesic, total number of acetaminophen/codeine tablets consumed postsurgery, incidence of sedation, hypotension and bradycardia. Results & Conclusions : There was no benefit from any dose of clonidine compared to placebo. There were no clonidine-related side effects seen within the dose range studied. In short duration minor hand surgery, the addition of clonidine to lidocaine-based intravenous regional anesthesia provides no measurable benefit.

  12. Enhancing the use of Argos satellite data for home range and long distance migration studies of marine animals.

    Directory of Open Access Journals (Sweden)

    Xavier Hoenner

    Full Text Available Accurately quantifying animals' spatial utilisation is critical for conservation, but has long remained an elusive goal due to technological impediments. The Argos telemetry system has been extensively used to remotely track marine animals, however location estimates are characterised by substantial spatial error. State-space models (SSM constitute a robust statistical approach to refine Argos tracking data by accounting for observation errors and stochasticity in animal movement. Despite their wide use in ecology, few studies have thoroughly quantified the error associated with SSM predicted locations and no research has assessed their validity for describing animal movement behaviour. We compared home ranges and migratory pathways of seven hawksbill sea turtles (Eretmochelys imbricata estimated from (a highly accurate Fastloc GPS data and (b locations computed using common Argos data analytical approaches. Argos 68(th percentile error was 4 km for LC ≤ 0. Argos error structure was highly longitudinally skewed and was, for all LC, adequately modelled by a Student's t distribution. Both habitat use and migration routes were best recreated using SSM locations post-processed by re-adding good Argos positions (LC 1, 2 and 3 and filtering terrestrial points (mean distance to migratory tracks ± SD = 2.2 ± 2.4 km; mean home range overlap and error ratio = 92.2% and 285.6 respectively. This parsimonious and objective statistical procedure however still markedly overestimated true home range sizes, especially for animals exhibiting restricted movements. Post-processing SSM locations nonetheless constitutes the best analytical technique for remotely sensed Argos tracking data and we therefore recommend using this approach to rework historical Argos datasets for better estimation of animal spatial utilisation for research and evidence-based conservation purposes.

  13. Establishment of gastro-intestinal helminth infections in free-range chickens: a longitudinal on farm study.

    Science.gov (United States)

    Wongrak, Kalyakorn; Daş, Gürbüz; Moors, Eva; Sohnrey, Birgit; Gauly, Matthias

    2014-01-01

    The objective of this study was to monitor establishment and development of gastro-intestinal helminth infections in chickens over two production years (PY) on a free-range farm in Lower Saxony, Germany. The data were collected between July 2010 and June 2011 (PY1) and July 2011 and January 2013 (PY2), respectively. During PY1, Lohmann Brown classic (LB classic, N = 450) was tested, while in PY2 two different genotypes (230 LB classic, 230 LB plus) were used. The hens were kept in two mobile stalls that were moved to a new position at regular intervals. In both PY1 and PY2, 20 individual faecal samples per stall were randomly collected at monthly intervals in order to calculate the number of internal parasite eggs per gram of faeces (EPG). At the end of the laying periods, approximately 10% (N = 42) or more than 50% (N = 265) of hens were subjected to post-mortem parasitological examinations in PY1 and PY2, respectively. No parasite eggs were found in the faecal samples during PY1, whereas almost all of the hens (97.6%) were infected with Heterakis gallinarum (36 worms/hen) at the end of the period. In PY2, nematode eggs in faeces were found from the third month onwards at a low level, increasing considerably towards the final three months. There was no significant difference between the two genotypes of brown hens neither for EPG (P = 0.456) or for overall prevalence (P = 0.177). Mortality rate ranged from 18.3 to 27.4% but did not differ significantly between genotypes or production years. Average worm burden was 207 worms/hen in PY2. The most prevalent species were H. gallinarum (98.5%) followed by Ascaridia galli (96.2%) and Capillaria spp. (86.1%). Furthermore, three Capillaria species, C. obsignata, C. bursata and C. caudinflata were differentiated. In conclusion chickens kept on free-range farms are exposed to high risks of nematode infections and have high mortality rates with no obvious link to parasite infections. Once the farm environment is contaminated

  14. Performance studies of lead/scintillating-fibre calorimeters in the 1 to 10 GeV range

    International Nuclear Information System (INIS)

    Barrelet, E.; Borhani, A.; Castera, A.; Canton, B.; Dagoret, S.; Denance, J.P.; Imbaut, D.; Kovacs, F.; Lacour, D.; Lamarche, F.; Moreau, F.; Sirois, Y.; Yiou, T.P.; Zitoun, R.

    1994-01-01

    Three calorimeter modules made of scintillating fibres embedded in a lead matrix were tested at the CERN Proton Synchrotron. The linearity of the energy response to electron-induced showers, measured in a module having a lead-to-fibre volume ratio of 1.8, is verified within 2.5% whilst the energy resolution is found to be 9.6%/√(E)+1% at 6 and 4 impact angles in the horizontal and vertical planes. An impact position resolution of 1.51 mm/√(E)+1.45 mm is achieved. The e/π ± separation based on the longitudinal and transverse shower size is discussed for various calorimeter configurations. Requiring an energy above a threshold of 3 GeV leads to a π ± rejection factor of 12 to 36 with longitudinal criterium, and a π ± rejection factor of 43 to 100 with a transverse cut in a π ± energy range of 3 to 7 GeV. A combination of both criteria leads to a rejection factor between 116 and 303 in the same energy range. The study of the time shape of the signals shows a very small intrinsic jitter of 0.4 ns on the calorimeter signals. It does not show any evidence of a detectable neutronic tail in π ± signals. ((orig.))

  15. A thermoluminescence study of mineral silicates extracted from herbs in the dose range 0.5–5 Gy

    International Nuclear Information System (INIS)

    Della Monaca, Sara; Fattibene, Paola; Bortolin, Emanuela

    2013-01-01

    The presence of silicates in many personal objects suggests their potential use at low dose as fortuitous dosimeter in an accidental radiological exposure, when conventional dosimetry is not available. The goal of the present work is the dosimetric characterization of mineral silicates extracted from the plant Hibiscus Sabdariffa L, known as Jamaica flower, in the dose range 0.5–5 Gy. By studying the radiation-induced signal in time, the temperature integration region between 210 °C and 250 °C was found to be the most stable and also reduced the effects of thermal fading in the dose reconstruction process; the dose response curve was linear between 0.5 Gy and 5 Gy. By checking the change in sensitivity after repeated exposures to ionizing radiations and to high temperature heating, no variation in the glow curve shape or peak intensities were detected. To eliminate a pre-existing background signal, all the characterization measurements were performed with aliquots “annealed” by a preliminary readout of the TL. - Highlights: • Glow curves change in shape and intensity just in the first 3 days after irradiation. • The dose response is linear in the dose range 0.5–5 Gy. • The curve shape or intensity don't change after repeated exposures and heatings. • Encouraging results were obtained in the dose recovery test

  16. Low temperature resistivity studies of SmB6: Observation of two-dimensional variable-range hopping conductivity

    Science.gov (United States)

    Batkova, Marianna; Batko, Ivan; Gabáni, Slavomír; Gažo, Emil; Konovalova, Elena; Filippov, Vladimir

    2018-05-01

    We studied electrical resistance of a single-crystalline SmB6 sample with a focus on the region of the "low-temperature resistivity plateau". Our observations did not show any true saturation of the electrical resistance at temperatures below 3 K down to 70 mK. According to our findings, temperature dependence of the electrical conduction in a certain temperature interval above 70 mK can be decomposed into a temperature-independent term and a temperature-activated term that can be described by variable-range hopping formula for two-dimensional systems, exp [ -(T0 / T) 1 / 3 ]. Thus, our results indicate importance of hopping type of electrical transport in the near-surface region of SmB6.

  17. Oxygen isotope studies of early Precambrian granitic rocks from the Giants Range batholith, northeastern Minnesota, U.S.A.

    Science.gov (United States)

    Viswanathan, S.

    1974-01-01

    Oxygen isotope studies of granitic rocks from the 2.7 b.y.-old composite Giants Range batholith show that: (1) ??(O18)quartz values of 9 to 10 permil characterize relatively uncontaminated Lower Precambrian, magmatic granodiorites and granites; (2) granitic rocks thought to have formed by static granitization have ??(O18)quartz values that are 1 to 2 permil higher than magmatic granitic rocks; (3) satellite leucogranite bodies have values nearly identical to those of the main intrusive phases even where they transect O18-rich metasedimentary wall rocks; (4) oxygen isotopic interaction between the granitic melts and their O18-rich wall rocks was minimal; and (5) O18/O18 ratios of quartz grains in a metasomatic granite are largely inherited from the precursor rock, but during the progression - sedimentary parent ??? partially granitized parent ??? metasomatic granite ??? there is gradual decrease in ??(O18)quartz by 1 to 2 permil. ?? 1974.

  18. Study of the Wavelength Dependence in Laser Ablation of Advanced Ceramics and Glass-Ceramic Materials in the Nanosecond Range.

    Science.gov (United States)

    Sola, Daniel; Peña, Jose I

    2013-11-19

    In this work, geometrical dimensions and ablation yields as a function of the machining method and reference position were studied when advanced ceramics and glass-ceramic materials were machined with pulsed lasers in the nanosecond range. Two laser systems, emitting at 1064 and 532 nm, were used. It was shown that the features obtained depend on whether the substrate is processed by means of pulse bursts or by grooves. In particular, when the samples were processed by grooves, machined depth, removed volume and ablation yields reached their maximum, placing the sample out of focus. It was shown that these characteristics do not depend on the processing conditions, the wavelength or the optical configuration, and that this is intrinsic behavior of the processing method. Furthermore, the existence of a close relation between material hardness and ablation yields was demonstrated.

  19. Economic Viability Study of an On-Road Wireless Charging System with a Generic Driving Range Estimation Method

    Directory of Open Access Journals (Sweden)

    Aditya Shekhar

    2016-01-01

    Full Text Available The economic viability of on-road wireless charging of electric vehicles (EVs strongly depends on the choice of the inductive power transfer (IPT system configuration (static or dynamic charging, charging power level and the percentage of road coverage of dynamic charging. In this paper, a case study is carried out to determine the expected investment costs involved in installing the on-road charging infrastructure for an electric bus fleet. Firstly, a generic methodology is described to determine the driving range of any EV (including electric buses with any gross mass and frontal area. A dynamic power consumption model is developed for the EV, taking into account the rolling friction, acceleration, deceleration, aerodynamic drag, regenerative braking and Li-ion battery behavior. Based on the simulation results, the linear dependence of the battery state of charge (SoC on the distance traveled is proven. Further, the impact of different IPT system parameters on driving range is incorporated. Economic implications of a combination of different IPT system parameters are explored for achieving the required driving range of 400 km, and the cost optimized solution is presented for the case study of an electric bus fleet. It is shown that the choice of charging power level and road coverage are interrelated in the economic context. The economic viability of reducing the capacity of the on-board battery as a trade-off between higher transport efficiency and larger on-road charging infrastructure is presented. Finally, important considerations, like the number of average running buses, scheduled stoppage time and on-board battery size, that make on-road charging an attractive option are explored. The cost break-up of various system components of the on-road charging scheme is estimated, and the final project cost and parameters are summarized. The specific cost of the wireless on-road charging system is found to be more expensive than the conventional

  20. Reaction OH + OH studied over the 298-834 K temperature and 1-100 bar pressure ranges.

    Science.gov (United States)

    Sangwan, Manuvesh; Chesnokov, Evgeni N; Krasnoperov, Lev N

    2012-06-21

    Self-reaction of hydroxyl radicals, OH + OH → H(2)O + O (1a) and OH + OH → H(2)O(2) (1b), was studied using pulsed laser photolysis coupled to transient UV-vis absorption spectroscopy over the 298-834 K temperature and 1-100 bar pressure ranges (bath gas He). A heatable high-pressure flow reactor was employed. Hydroxyl radicals were prepared using reaction of electronically excited oxygen atoms, O((1)D), produced in photolysis of N(2)O at 193 nm, with H(2)O. The temporal behavior of OH radicals was monitored via transient absorption of light from a dc discharge in H(2)O/Ar low-pressure resonance lamp at ca. 308 nm. The absolute intensity of the photolysis light was determined by accurate in situ actinometry based on the ozone formation in the presence of molecular oxygen. The results of this study combined with the literature data indicate that the rate constant of reaction 1a, associated with the pressure independent component, decreases with temperature within the temperature range 298-414 K and increases above 555 K. The pressure dependent rate constant for (1b) was parametrized using the Troe expression as k(1b,inf) = (2.4 ± 0.6) × 10(-11)(T/300)(-0.5) cm(3) molecule(-1) s(-1), k(1b,0) = [He] (9.0 ± 2.2) × 10(-31)(T/300)(-3.5±0.5) cm(3) molecule(-1) s(-1), F(c) = 0.37.