WorldWideScience

Sample records for dennie palmer wolf

  1. Saqik (Denny).

    Science.gov (United States)

    Pope, Mary L.; And Others

    This story about a boy named Denny is a preprimer designed for children in bilingual Inupiat-English programs in the Alaskan villages of Ambler, Kobuk, Kiana, Noorvik and Shungnak. Each page of text is illustrated with a black-and-white drawing. The English equivalent is given at the back and is not included in student copies of the book. (CFM)

  2. Interview with Dennis Pearl

    Science.gov (United States)

    Rossman, Allan; Pearl, Dennis

    2017-01-01

    Dennis Pearl is Professor of Statistics at Pennsylvania State University and Director of the Consortium for the Advancement of Undergraduate Statistics Education (CAUSE). He is a Fellow of the American Statistical Association. This interview took place via email on November 18-29, 2016, and provides Dennis Pearl's background story, which describes…

  3. Palmer Drought Severity Index

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — PDSI from the Dai dataset. The Palmer Drought Severity Index (PDSI) is devised by Palmer (1965) to represent the severity of dry and wet spells over the U.S. based...

  4. Upon Further Review: V. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory

    Science.gov (United States)

    Warner, Brian D.

    2011-01-01

    Updated results are given for nine asteroids previously reported from the Palmer Divide Observatory (PDO). The original images were re-measured to obtain new data sets using the latest version of MPO Canopus photometry software, analysis tools, and revised techniques for linking multiple observing runs covering several days to several weeks. Results that were previously not reported or were moderately different were found for 1659 Punkajarju, 1719 Jens, 1987 Kaplan, 2105 Gudy, 2961 Katsurahama, 3285 Ruth Wolfe, 3447 Burckhalter, 7816 Hanoi, and (34817) 2000 SE116. This is one in a series of papers that will examine results obtained during the initial years of the asteroid lightcurve program at PDO.

  5. Wolf prize in physics

    CERN Document Server

    Piran, Tsvi

    2016-01-01

    The Wolf Foundation began its activities in 1976, with an initial endowment donated by the Wolf family. Within a very short period of time after its initiation, the Wolf prize has become one of the major signs for recognition of scientific achievements and excellence. This volume is devoted to a selection of Wolf Prize laureates in Physics and each has included two respective major publications as well as a commentary written by the laureate describing his scientific career. Readers around the world are provided a unique opportunity to get a glimpse of how scientific processes work in physics, and to comprehend how these laureates have left an indelible imprint on scientific history.

  6. Assessment of the Use of the Nelson Denny Reading Test.

    Science.gov (United States)

    Perkins, Dorothy

    1984-01-01

    The Nelson Denny Reading Test (NDRT) is probably the most widely used test of reading comprehension at the college level in the nation. However, reviews of the test, as well as recent reports of its failure to adequately measure gain or lack of gain of college students enrolled in reading improvement courses, do not support the popularity it has…

  7. Wolf-Hirschhorn Syndrome

    African Journals Online (AJOL)

    Extract Studio

    she had the distinctive facial features of Wolf-Hirschhorn syndrome that included hyperteleorism, ... The PDA noted at birth had closed by 3 months and there was no other cardiac .... followed by pulmonary stenosis, ventricular septal defects,.

  8. Wolf-Rayet Stars

    Science.gov (United States)

    Hamann, Wolf-Rainer; Sander, Andreas; Todt, Helge

    Nearly 150 years ago, the French astronomers Charles Wolf and Georges Rayet described stars with very conspicuous spectra that are dominated by bright and broad emission lines. Meanwhile termed Wolf-Rayet Stars after their discoverers, those objects turned out to represent important stages in the life of massive stars. As the first conference in a long time that was specifically dedicated to Wolf-Rayet stars, an international workshop was held in Potsdam, Germany, from 1.-5. June 2015. About 100 participants, comprising most of the leading experts in the field as well as as many young scientists, gathered for one week of extensive scientific exchange and discussions. Considerable progress has been reported throughout, e.g. on finding such stars, modeling and analyzing their spectra, understanding their evolutionary context, and studying their circumstellar nebulae. While some major questions regarding Wolf-Rayet stars still remain open 150 years after their discovery, it is clear today that these objects are not just interesting stars as such, but also keystones in the evolution of galaxies. These proceedings summarize the talks and posters presented at the Potsdam Wolf-Rayet workshop. Moreover, they also include the questions, comments, and discussions emerging after each talk, thereby giving a rare overview not only about the research, but also about the current debates and unknowns in the field. The Scientific Organizing Committee (SOC) included Alceste Bonanos (Athens), Paul Crowther (Sheffield), John Eldridge (Auckland), Wolf-Rainer Hamann (Potsdam, Chair), John Hillier (Pittsburgh), Claus Leitherer (Baltimore), Philip Massey (Flagstaff), George Meynet (Geneva), Tony Moffat (Montreal), Nicole St-Louis (Montreal), and Dany Vanbeveren (Brussels).

  9. Research Ship Nathaniel B. Palmer Underway Meteorological Data, Quality Controlled

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Research Ship Nathaniel B. Palmer Underway Meteorological Data (delayed ~10 days for quality control) are from the Shipboard Automated Meteorological and...

  10. Climate Prediction Center (CPC) Palmer Drought and Crop Moisture Indices

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Climate Prediction Center (CPC) Palmer Drought Severity and Crop Moisture Indices are computed for the 344 U.S. Climate Divisions on a weekly basis based on a...

  11. Prokofiev: War and Peace - Symphonic Suite (arr. Palmer) / Ivan March

    Index Scriptorium Estoniae

    March, Ivan

    1993-01-01

    Uuest heliplaadist "Prokofiev: War and Peace - Symphonic Suite (arr. Palmer), Summer Night, Op. 123. Russian Overture, Op. 72. Philharmonia Orchestra / Neeme Järvi. Chandos ABTD 1598 CHAN9096 (64 minutes:DDD) Igor - Polovtsian Dances

  12. Breathing Silence. An interview with John Palmer

    Directory of Open Access Journals (Sweden)

    Cristina Scuderi

    2011-07-01

    Full Text Available The interview focuses on some aspects of the composer’s work with electronics. Palmer, described by the critics as «undoubtedly the most visionary composer of his generation» speaks about the composers and musical works that have had a major impact on him. He also mentions the friendship with John Cage, his numerous travels – with particular emphasis on Japan – and the influence of Eastern culture on his musical mind. The composer discusses the notion of causality explored in Renge-Kyo, the meditative nature of Transient and Inwards, and spirituality as the central theme of both acousmatic works In the Temple and I Am. The electronic medium is also por- trayed as a mirror of an intense and vivid preoccupation for intimacy and perpetual search for timbral qualities that by now characterize most of his music. Another important aspect of Palmer’s work mentioned in the interview is the collaboration with some established performers and its importance for the realization of a musical work.

  13. Audience as analyst: Dennis Potter's The Singing Detective.

    Science.gov (United States)

    Jeffrey, W

    1997-06-01

    Author Dennis Potter has written an exceptional psychoanalytically informed television series in The Singing Detective. Potter succeeds by echewing the usual portrayal of psychoanalysis in cinema and television as a therapy which the viewer observes but instead creates, by means of the content and structure of the series, a production that forces the audience into a role of analyst. The story of the current life and the childhood of the protagonist, Philip Marlow, has depth and context which allows the audience to examine the personality of Marlow, including character pathology and traits, sexuality, fantasy, dreams, and delusions from several metapsychological viewpoints. Potter allows the audience to use the dynamic, genetic, topographic, and, most unusual in drama, structural viewpoints. The audience can experience aspects of an analyst's experience, including the process of formulating and evaluating over time analytic hypotheses and coping with emotional reactions to the material which at times has transferencelike qualities.

  14. Never Cry Wolf

    DEFF Research Database (Denmark)

    Sinding, Mikkel Holger Strander

    of mostly wolves and dogs, to explore and document the origin and genomic history of indigenous Greenland dogs and wolves. During data exploration, several findings were made, including many novel results in surprising parts of the data, overall making 6 structured datasets of focus. 1) When focusing...... in any sled dogs. 6) When focusing on Greenland wolves we find that the original exterminated wolves and the wolves that have re-colonised, are the same distinct Polar wolf population endemic to Axel Heibergs Land, Ellesmere Island and Greenland. The Polar wolves have very little gene flow with other...

  15. Hurricane Dennis Aerial Photography: Draft Image Mosaics of the Florida Panhandle and Surrounding Regions After Landfall

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The imagery posted on this site is of the Florida panhandle and surrounding regions after Hurricane Dennis made landfall. The regions photographed range from...

  16. Genetic sampling of Palmer's chipmunks in the Spring Mountains, Nevada

    Science.gov (United States)

    Kevin S. McKelvey; Jennifer E. Ramirez; Kristine L. Pilgrim; Samuel A. Cushman; Michael K. Schwartz

    2013-01-01

    Palmer's chipmunk (Neotamias palmeri) is a medium-sized chipmunk whose range is limited to the higher-elevation areas of the Spring Mountain Range, Nevada. A second chipmunk species, the Panamint chipmunk (Neotamias panamintinus), is more broadly distributed and lives in lower-elevation, primarily pinyon-juniper (Pinus monophylla-Juniperus osteosperma) habitat...

  17. Hydroids from submarine cliffs near Arthur Harbour, Palmer Archipelago, Antarctica

    NARCIS (Netherlands)

    Vervoort, W.

    1972-01-01

    At the instigation of Dr. Joel W. Hedgpeth, Resident Director, Marine Science Center, Oregon State University, Newport, Oregon, U.S.A., I studied samples of hydroids, collected by Dr. John C. McCain and Dr. William E. Stout from submarine cliffs in the region around Palmer Station, Antarctica. The

  18. The Lurking Wolf

    DEFF Research Database (Denmark)

    Larsen, Janni Lisander; Jacobsen, Søren; Hall, Elisabeth

    of existential experiences over time in female patients suffering from Lupus. Method: Three 3 qualitative indept interviews with 15 women is planned during 1½ year. First and second round is performed, and third is planned during spring 2015. Interviews are guided by Van Manens life world existentials (time...... to withdraw their consent, and to choose time and place for the interviewing. Results: Interpretation on the existential meaning is in progress. Preliminary results document that the chaotic time of the diagnosis gradually changes over the years, leaving a mark on their existential life. Experiencing......THE LURKING OF THE WOLF- QUALITATIVE RESARCH OF EXISTENTIAL EXPERIENCES WITH LUPUS IN FEMALE PATIENTS. J. Lisander Larsen (1, 2), S. Jacobsen (2), E.O. C. Hall (1), R. Birkelund(3) (1) Department of Public Health, Aarhus University, Section for Nursing, Denmark. (2) University Hospital...

  19. Wolf-Rayet phenomena

    International Nuclear Information System (INIS)

    Conti, P.S.

    1982-01-01

    The author reviews in broad terms the concept of Wolf-Rayet (W-R) phenomena, outlines what we currently know about the properties of stars showing such phenomena and indicates the directions in which future work is leading. He begins by listing the characteristics of W-R spectra and then considers the following specific problems: the absolute visual magnitudes; the heterogeneity of WN spectra; the existence of transition type spectra and compositions; the mass loss rates; the existence of very luminous and possibly very massive W-R stars. He discusses briefly our current understanding of the theoretical aspects of stellar evolution and stellar winds and the various scenarios that have been proposed to understand W-R stars. (Auth.)

  20. Wolf-Rayet stars

    Energy Technology Data Exchange (ETDEWEB)

    Sahade, J

    1981-12-01

    Aspects of the problems of the Wolf-Rayet stars related to their chemical composition, their evolutionary status, and their apparent dichotomy in two spectral sequences are discussed. Dogmas concerning WR stars are critically discussed, including the belief that WR stars lack hydrogen, that they are helium stars evolved from massive close binaries, and the existence of a second WR stage in which the star is a short-period single-lined binary. The relationship of WR stars with planetary nebulae is addressed, as is the membership of these stars in clusters and associations. The division of WR stars into WN and WC sequences is considered, questioning the reasonability of accounting for WR line formation in terms of abundance differences.

  1. Sağlık Çalışanlarında Hizmetkâr Liderlik: Dennis-Winston ve Dennis-Bocernea Hizmetkâr Liderlik Ölçeklerinin Geçerlik ve Güvenirlik Araştırması( Servant Leadership Among Medical Staff: Investigation of Validity and Reliability of Dennis-Winston and Dennis-Bocernea Servant Leadership Scales

    Directory of Open Access Journals (Sweden)

    Şebnem ASLAN

    2011-01-01

    Full Text Available This study aims to contribute the two different scales used in evaluation of servant leadership among medical staff on Turkish literature. In this context, validity and reliability analysis of Dennis and Winston (2003 and Dennis and Bocernea (2006 Servant Leadership Scales are done. Dennis and Winston Scale includes 23 questions and 3 dimensions, and Dennis and Bocernea scale includes 29 questions and 7 dimensions. The survey is conducted with 180 staff in practising in three different hospitals of Konya province. The datas obtained from the survey are analysed with descriptive statistics and confirmatory factor analysis using SPSS 16.0 and Lisrel 8 programmes. As a result, Dennis and Bocernea scale is reduced to 5 dimensions and 14 questions, and Dennis and Winston scale to 3 dimensions and 14 questions. The new scale is found as valid and reliable.

  2. Wolf-Rayet nebulae

    International Nuclear Information System (INIS)

    Chu, You-Hua

    2016-01-01

    Since the discovery of nebulae around Wolf-Rayet (WR) stars in the 1960s, it has been established that WR stars are massive stars at advanced evolutionary stages and that their surrounding nebulae result from the interactions between the stellar mass loss and the ambient interstellar medium. Surveys of WR nebulae have been made in the Galaxy, Magellanic Clouds, and other nearby galaxies in the Local Group. Some WR nebulae exhibit He II λ4686 line emission, indicating stellar effective temperatures of 90 — 100 x 10 3 K. The shocked fast stellar winds from WR nebulae have been detected in soft X-rays, but theoretical models have not been able to reproduce the observed X-ray spectral properties. Elemental abundances of WR nebulae consisting of synthesized stellar material can constrain stellar evolution models, but high-dispersion spectra are needed to kinematically separate the expanding shell of a WR nebula and the background interstellar medium for accurate abundance analyses. (paper)

  3. THREE PLANETS ORBITING WOLF 1061

    Energy Technology Data Exchange (ETDEWEB)

    Wright, D. J.; Wittenmyer, R. A.; Tinney, C. G.; Bentley, J. S.; Zhao, Jinglin, E-mail: duncan.wright@unsw.edu.au [Department of Astronomy and Australian Centre for Astrobiology, School of Physics, University of New South Wales, NSW 2052 (Australia)

    2016-02-01

    We use archival HARPS spectra to detect three planets orbiting the M3 dwarf Wolf 1061 (GJ 628). We detect a 1.36 M{sub ⊕} minimum-mass planet with an orbital period P = 4.888 days (Wolf 1061b), a 4.25 M{sub ⊕} minimum-mass planet with orbital period P = 17.867 days (Wolf 1061c), and a likely 5.21 M{sub ⊕} minimum-mass planet with orbital period P = 67.274 days (Wolf 1061d). All of the planets are of sufficiently low mass that they may be rocky in nature. The 17.867 day planet falls within the habitable zone for Wolf 1061 and the 67.274 day planet falls just outside the outer boundary of the habitable zone. There are no signs of activity observed in the bisector spans, cross-correlation FWHMs, calcium H and K indices, NaD indices, or Hα indices near the planetary periods. We use custom methods to generate a cross-correlation template tailored to the star. The resulting velocities do not suffer the strong annual variation observed in the HARPS DRS velocities. This differential technique should deliver better exploitation of the archival HARPS data for the detection of planets at extremely low amplitudes.

  4. The Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Cherepashchuk, A.M.; Khaliullin, K.F.

    1983-01-01

    One may say that the observational evidence now available for Wolf-Rayet stars, particularly the results gained by analyzing eclipsing binary systems prove that at least some of these objects are helium stars. At the same time, the low electron temperatures in the emission-line zones, the indisputable evidence of a highly extended atmosphere and the steady loss of material by these stars all strongly support the fluorescence model proposed by a previous study, whereby Wolf-Rayet envelopes would owe their luminosity to conversion of the short-wavelength radiation emitted by the hot stellar core

  5. Politics, Place and Religion in Irish American Noir Fiction. An Interview with Dennis Lehane

    Directory of Open Access Journals (Sweden)

    Carlos Menéndez Otero

    2012-03-01

    With thanks to the 24th Semana Negra book festival organizing committee, what follows is an edited transcription of Dennis Lehane’s press conference and the brief interview the author kindly granted us afterwards in Gijon, Spain, on July 28, 2011

  6. Passageless Comprehension on the "Nelson-Denny Reading Test": Well above Chance for University Students

    Science.gov (United States)

    Coleman, Chris; Lindstrom, Jennifer; Nelson, Jason; Lindstrom, William; Gregg, K. Noel

    2010-01-01

    The comprehension section of the "Nelson-Denny Reading Test" (NDRT) is widely used to assess the reading comprehension skills of adolescents and adults in the United States. In this study, the authors explored the content validity of the NDRT Comprehension Test (Forms G and H) by asking university students (with and without at-risk…

  7. "Passageless" Administration of the Nelson-Denny Reading Comprehension Test: Associations with IQ and Reading Skills

    Science.gov (United States)

    Ready, Rebecca E.; Chaudhry, Maheen F.; Schatz, Kelly C.; Strazzullo, Sarah

    2013-01-01

    There are few tests that assess reading comprehension in adults, but these tests are needed for a comprehensive assessment of reading disorders (RD). "The Nelson-Denny Reading Test" (NDRT) has a long-passage reading comprehension component that can be used with adolescents and adults. A problem with the NDRT is that reading comprehension…

  8. Landscape, Memory and Myth: An Interview with Native American Artist, Jeremy Dennis

    Directory of Open Access Journals (Sweden)

    Dennis, Jeremy

    2017-12-01

    Full Text Available Jeremy Dennis is a photographer and visual artist living and working in Southampton, New York. He is a member of the Shinnecock Indian Nation; a federally recognised tribe of historically Algonquian-speaking Native Americans based at the eastern end of Long Island, New York. He received his MFA from Pennsylvania State University in 2016, and in the same year, was one of only two artists in the USA awarded the Harpo Native American Residency Fellowship. In his work, Jeremy channels his experiences as an indigenous artist to explore and expand upon issues relating to identity, assimilation and post-colonialism. Through a combination of digitally manipulated photography, site-specific installation, performance and documentation, Dennis attempts to create multi-dimensional conversations around local and broader contemporary Native American issues, whilst also referencing its rich and complex history. jeremynative.com

  9. "We Shall Have to Make the Best of It:" The Conversion of Dennis Sciama

    OpenAIRE

    Hunt, James Christopher

    2005-01-01

    The cosmologist Dennis W. Sciama (1926-1999) was a long-standing advocate of the steady state model of the universe. This theory, originally proposed in 1948 by Hermann Bondi, Thomas Gold, and Fred Hoyle, suggested that the universe was eternal, and unchanging on the largest scales. Contrary to the popular image of a scientist as a dispassionate, unbiased investigator of nature, Sciama fervently hoped the steady state model to be correct. In addition, and also pace the stereotypical image ...

  10. Evaluation of modified Dennis parasitological technique for diagnosis of bovine fascioliasis.

    Science.gov (United States)

    Correa, Stefanya; Martínez, Yudy Liceth; López, Jessika Lissethe; Velásquez, Luz Elena

    2016-02-23

    Bovine fascioliasis causes important economic losses, estimated at COP$ 12,483 billion per year; its prevalence is 25% in dairy cattle. Parasitological techniques are required for it diagnosis. The Dennis technique, modified in 2002, is the one used in Colombia, but its sensitivity, specificity and validity are not known.  To evaluate the validity and performance of the modified Dennis technique for diagnosis of bovine fascioliasis using as reference test the observation of parasites in the liver.  We conducted a diagnostic evaluation study. We selected a convenience sample of discarded bovines sacrificed between March and June, 2013, in Frigocolanta for the study. We collected 25 g of feces from each animal and their liver and bile ducts were examined for Fasciola hepatica. The sensitivity, specificity, predictive positive value, predictive negative value, and validity index were calculated with 95% confidence intervals. The post-mortem evaluation was used as the gold standard.  We analyzed 180 bovines. The sensitivity and specificity of the modified Dennis technique were 73.2% (95% CI=58.4% - 87.9%) and 84.2% (95% CI= 77.7% - 90.6%), respectively. The positive predictive value was 57.7% (95% CI= 43.3% - 72.1%) and the negative one 91.4% (95% CI= 86.2% - 96.6%). The prevalence of bovine fascioliasis was 22.8% (95% CI= 16.4% - 29.2%).  The validity and the performance of the modified Dennis technique were higher than those of the traditional one, which makes it a good screening test for diagnosing fascioliasis for population and prevalence studies and during animal health campaigns.

  11. Denali Park wolf studies: Implications for Yellowstone

    Science.gov (United States)

    Mech, L. David; Meier, Thomas J.; Burch, John W.

    1991-01-01

    The Northern Rocky Mountain Wolf Recovery Plan approved by the U.S. Fish and Wildlife Service (1987) recommends re-establishment of wolves (Canis lupus) in Yellowstone National Park. Bills proposing wolf re-establishment in the Park have been introduced into the U.S. House and Senate. However, several questions have been raised about the possible effects of wolf re-establishment on other Yellowstone Park fauna, on human use of the Park and on human use of surrounding areas. Thus the proposed wolf re-establishment remains controversial.Information pertinent to some of the above questions is available from a current study of wolf ecology in Denali National Park and Preserve, Alaska, which we began in 1986. Although Denali Park differs from Yellowstone in several ways, it is also similar enough in important respects to provide insight into questions raised about wolf re-establishment in Yellowstone.

  12. Denni Algorithm An Enhanced Of SMS (Scan, Move and Sort) Algorithm

    Science.gov (United States)

    Aprilsyah Lubis, Denni; Salim Sitompul, Opim; Marwan; Tulus; Andri Budiman, M.

    2017-12-01

    Sorting has been a profound area for the algorithmic researchers, and many resources are invested to suggest a more working sorting algorithm. For this purpose many existing sorting algorithms were observed in terms of the efficiency of the algorithmic complexity. Efficient sorting is important to optimize the use of other algorithms that require sorted lists to work correctly. Sorting has been considered as a fundamental problem in the study of algorithms that due to many reasons namely, the necessary to sort information is inherent in many applications, algorithms often use sorting as a key subroutine, in algorithm design there are many essential techniques represented in the body of sorting algorithms, and many engineering issues come to the fore when implementing sorting algorithms., Many algorithms are very well known for sorting the unordered lists, and one of the well-known algorithms that make the process of sorting to be more economical and efficient is SMS (Scan, Move and Sort) algorithm, an enhancement of Quicksort invented Rami Mansi in 2010. This paper presents a new sorting algorithm called Denni-algorithm. The Denni algorithm is considered as an enhancement on the SMS algorithm in average, and worst cases. The Denni algorithm is compared with the SMS algorithm and the results were promising.

  13. Rob Wolf 1947-2010

    CERN Multimedia

    TE Department

    2010-01-01

    We deeply regret to announce the death of Mr Rob WOLF on 20.06.2010. Mr Rob Wolf, born on 07.06.1947, worked in the TE Department and had been employed at CERN since 15.09.1973. The Director-General has sent his family a message of condolence on behalf of the CERN staff. Social Affairs Human Resources Department Rob Wolf passed away on Sunday 20 June after a long illness. Born in June 1947 in The Netherlands, he joined CERN as a fellow in September 1972 after obtaining his doctoral qualification from the University of Leiden (NL) on the degradation of superconducting materials in ionizing radiation. He was a member of the CERN personnel since 1st March 1975. Rob immediately assumed full responsibility for the measurement and qualification of the superconducting materials for the low-beta magnet project of the ISR, and was then tasked with the manufacture of the corrector windings of these magnets. Throughout his working life he remained a reference in these areas. Later, Rob took on the responsibi...

  14. Wolf-Rayet Stars in Starburst Galaxies

    OpenAIRE

    Mas-Hesse, J. Miguel; Kunth, Daniel; Cervino, Miguel

    1999-01-01

    Wolf-Rayet stars have been detected in a large number of galaxies experiencing intense bursts of star formation. All stars initially more massive than a certain, metallicity-dependent, value are believed to experience the Wolf-Rayet phase at the end of their evolution, just before collapsing in supernova explosion. The detection of Wolf-Rayet stars puts therefore important constraints on the evolutionary status of starbursts, the properties of their Initial Mass Functions and their star forma...

  15. Straight talk with... Carolyn Bertozzi. Interview by Roxanne Palmer.

    Science.gov (United States)

    Bertozzi, Carolyn

    2010-07-01

    Last month, Carolyn Bertozzi became the first woman to win the prestigious Massachusetts Institute of Technology (MIT)-Lemelson Prize, a $500,000 award that honors midcareer inventors. Bertozzi, a chemical biologist, works to understand how sugars mediate cell-to-cell communication. But she isn't content with just observing the process; her lab at the University of California-Berkeley has pioneered tools for labeling molecules inside living cells. Her biomedical inventions have contributed to the development of noninvasive methods for identifying disease tissue within the body-advances that could revolutionize both the diagnosis and the treatment of a host of diseases ranging from arthritis to cancer. Roxanne Palmer recently caught up with her by phone to discuss Bertozzi's sweet success with cell surface sugars.

  16. Wolf Point Substation, Roosevelt County, Montana

    International Nuclear Information System (INIS)

    1991-05-01

    The Western Area Power Administration (Western), an agency of the United States Department of Energy, is proposing to construct the 115-kV Wolf Point Substation near Wolf Point in Roosevelt County, Montana (Figure 1). As part of the construction project, Western's existing Wolf Point Substation would be taken out of service. The existing 115-kV Wolf Point Substation is located approximately 3 miles west of Wolf Point, Montana (Figure 2). The substation was constructed in 1949. The existing Wolf Point Substation serves as a ''Switching Station'' for the 115-kV transmission in the region. The need for substation improvements is based on operational and reliability issues. For this environmental assessment (EA), the environmental review of the proposed project took into account the removal of the old Wolf Point Substation, rerouting of the five Western lines and four lines from the Cooperatives and Montana-Dakota Utilities Company, and the new road into the proposed substation. Reference to the new proposed Wolf Point Substation in the EA includes these facilities as well as the old substation site. The environmental review looked at the impacts to all resource areas in the Wolf Point area. 7 refs., 6 figs

  17. Cystinuria in a maned wolf.

    Science.gov (United States)

    Bush, M; Bovee, K C

    1978-11-01

    A renal calculus composed principally of the amino acid, cystine, was found in an 8-year-old male maned wolf (Chrysocyon brachyurus). Cystine crystals were found in the urine sediment. The renal clearance of 10 amino acids was abnormal, whereas reabsorption of others was normal. The renal clearance of cystine, lysine, ornithine, and arginine exceeded the filtered load. The renal tubular handling of glucose, phosphate, sodium, potassium, and uric acid was identical to that for the clinically normal dog. These findings indicated an isolated renal tubular defect for cystine and other amino acids.

  18. Dennis Goulet

    NARCIS (Netherlands)

    D.R. Gasper (Des)

    2011-01-01

    markdownabstract__Abstract__ The human development approach emerged in the late 1980s in response to the negative effects of structural adjustment programmes applied to countries in the South. Led originally by two South Asian scholars, Mahbub ul Haq and Amartya Sen, in cooperation with a large

  19. PRESSURE - WATER and Other Data from NATHANIEL B. PALMER from 19940210 to 19940405 (NODC Accession 9800001)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature, salinity, and other data were collected in the Amundsen and Bellinghausen Seas from the Nathaniel B. Palmer from 10 February 1994 to 05 April 1994. Data...

  20. WATER TEMPERATURE and Other Data from NATHANIEL B. PALMER from 19961018 to 19970430 (NODC Accession 9900168)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Nutrients and other data were collected from CTD and bottle casts in the Antarctic Ocean from the Nathaniel B. Palmer from 18 October 1996 to 30 April 1997. Data...

  1. Interference of Selected Palmer Amaranth (Amaranthus palmeri Biotypes in Soybean (Glycine max

    Directory of Open Access Journals (Sweden)

    Aman Chandi

    2012-01-01

    Full Text Available Palmer amaranth (Amaranthus palmeri S. Wats. has become difficult to control in row crops due to selection for biotypes that are no longer controlled by acetolactate synthase inhibiting herbicides and/or glyphosate. Early season interference in soybean [Glycine max (L. Merr.] for 40 days after emergence by three glyphosate-resistant (GR and three glyphosate-susceptible (GS Palmer amaranth biotypes from Georgia and North Carolina was compared in the greenhouse. A field experiment over 2 years compared season-long interference of these biotypes in soybean. The six Palmer amaranth biotypes reduced soybean height similarly in the greenhouse but did not affect soybean height in the field. Reduction in soybean fresh weight and dry weight in the greenhouse; and soybean yield in the field varied by Palmer amaranth biotypes. Soybean yield was reduced 21% by Palmer amaranth at the established field density of 0.37 plant m−2. When Palmer amaranth biotypes were grouped by response to glyphosate, the GS group reduced fresh weight, dry weight, and yield of soybean more than the GR group. The results indicate a possible small competitive disadvantage associated with glyphosate resistance, but observed differences among biotypes might also be associated with characteristics within and among biotypes other than glyphosate resistance.

  2. Observational and evolutionary aspects of Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Vanbeveren, D.

    1980-01-01

    The author considers (i) the binary status of Wolf-Rayet stars, (ii) the evolutionary status of Wolf-Rayet stars, (iii) the chemical abundances of Wolf-Rayet stars and (iv) evolutionary models for some known Wolf-Rayet systems. (G.T.H.)

  3. The enigma of lone wolf terrorism: an assessment

    NARCIS (Netherlands)

    Spaaij, R.

    2010-01-01

    Lone wolf terrorism remains an ambiguous and enigmatic phenomenon. The boundaries of lone wolf terrorism are fuzzy and arbitrary. This article aims to define and analyze the main features and patterns of lone wolf terrorism in fifteen countries. Lone wolf terrorism is shown to be more prevalent in

  4. Geospatial Analysis of Grey Wolf Movement Patterns

    Science.gov (United States)

    Sur, D.

    2017-12-01

    The grey wolf is a top predator that lives across a diverse habitat, ranging from Europe to North America. They often hunt in packs, preferring caribou, deer and elk as prey. Currently, many gray wolves live in Denali National Park and Preserve. In this study, several wolf packs were studied in three distinct regions of Denali. The purpose of my research was to investigate the links between wolf habitat, movement patterns, and prey thresholds. These are needed for projecting future population, growth and distribution of wolves in the studied region. I also investigated the effect wolves have on the ecological structure of the communities they inhabit. In the study I carried out a quantitative analysis of wolf population trends and daily distance movement by utilizing an analysis of variance (ANOVA) in the program JmpPro12 (SAS Institute, Crary, NC) to assess regional differences in pack size, wolf density, average daily distance moved. I found a clear link between the wolf habitat and prey thresholds; the habitat directly influences the types of prey available. However there was no link between the daily distance movement, the wolf habitat and prey density.

  5. Integrated Palmer Amaranth Management in Glufosinate-Resistant Cotton: II. Primary, Secondary and Conservation Tillage

    Directory of Open Access Journals (Sweden)

    Michael G. Patterson

    2013-01-01

    Full Text Available A three year field experiment was conducted to evaluate the role of soil inversion, cover crops and spring tillage methods for Palmer amaranth between-row (BR and within-row (WR management in glufosinate-resistant cotton. Main plots were two soil inversion treatments: fall inversion tillage (IT and non-inversion tillage (NIT. Subplots were three cover treatments: crimson clover, cereal rye or none (i.e., winter fallow; and the sub subplots were four secondary spring tillage methods: disking followed by (fb cultivator (DCU, disking fb chisel plow (DCH, disking fb disking (DD and no tillage (NT. Averaged over years and soil inversion, the crimson clover produced maximum cover biomass (4390 kg ha−1 fb cereal rye (3698 kg ha−1 and winter fallow (777 kg ha−1. Two weeks after planting (WAP and before the postemergence (POST application, Palmer amaranth WR and BR density were two- and four-times less, respectively, in IT than NIT. Further, Palmer amaranth WR and BR density were reduced two-fold following crimson clover and cereal rye than following winter fallow at 2 WAP. Without IT, early season Palmer amaranth densities were 40% less following DCU, DCH and DD, when compared with IT. Following IT, no spring tillage method improved Palmer amaranth control. The timely application of glufosinate + S-metolachlor POST tank mixture greatly improved Palmer amaranth control in both IT and NIT systems. The highest cotton yields were obtained with DD following cereal rye (2251 kg ha−1, DD following crimson clover (2213 kg ha−1 and DD following winter fallow (2153 kg ha−1. On average, IT cotton yields (2133 kg ha−1 were 21% higher than NIT (1766 kg ha−1. Therefore, from an integrated weed management standpoint, an occasional fall IT could greatly reduce Palmer amaranth emergence on farms highly infested with glyphosate-resistant Palmer amaranth. In addition, a cereal rye or crimson clover cover crop can effectively reduce early season Palmer

  6. Genetics Home Reference: Wolf-Hirschhorn syndrome

    Science.gov (United States)

    ... ajmg.c.30187. Citation on PubMed Bergemann AD, Cole F, Hirschhorn K. The etiology of Wolf-Hirschhorn ... medicine? What is newborn screening? New Pages Lyme disease Fibromyalgia White-Sutton syndrome All New & Updated Pages ...

  7. Uurimist toimetavad Wolfe ja Goodwin / Katrin Mõttus

    Index Scriptorium Estoniae

    Mõttus, Katrin

    2003-01-01

    Sari filme - Rex Stout'i detektiivromaanide ekraniseeringud, kus peategelaseks eradetektiiv Nero Wolfe (Maury Chaykin) koos oma noore abilise Archie Goodwiniga (Timothy Hutton) : Ameerika Ühendriigid 2001-2002

  8. WOLF REXUS EXPERIMENT - European Planetary Science Congress

    Science.gov (United States)

    Buzdugan, A.

    2017-09-01

    WOLF experiment is developing a reaction wheel-based control system, effectively functioning as active nutation damper. One reaction wheel is used to reduce the undesirable lateral rates of spinning cylindrically symmetric free falling units, ejected from a sounding rocket. Once validated in REXUS flight, the concept and the design developed during WOLF experiment can be used for other application which require a flat spin of the free falling units.

  9. Wolf Creek Generating Station containment model

    International Nuclear Information System (INIS)

    Nguyen, D.H.; Neises, G.J.; Howard, M.L.

    1995-01-01

    This paper presents a CONTEMPT-LT/28 containment model that has been developed by Wolf Creek Nuclear Operating Corporation (WCNOC) to predict containment pressure and temperature behavior during the postulated events at Wolf Creek Generating Station (WCGS). The model has been validated using data provided in the WCGS Updated Safety Analysis Report (USAR). CONTEMPT-LT/28 model has been used extensively at WCGS to support plant operations, and recently, to support its 4.5% thermal power uprate project

  10. Raccoglier lettere. Le “Vico collaborations” di Jack W. Stauffacher e Dennis Letbetter

    Directory of Open Access Journals (Sweden)

    Armando, David

    2010-01-01

    Full Text Available Starting in the early ’70s the San Francisco printer and typographer Jack W. Stauffacher undertook a graphic exploration of Vico’s works, which continued during the past decade together with the photographer Dennis Letbetter. The aim of this article is to present their experience - which is at the same time poetic and historically attentive, focusing on the relationships between text and images, and on the typographical and physical qualities of 18th century editions - to an audience which includes Italian Vico scholars. The text is composed of a brief introduction and an interview with the two artists, and is followed (pp. 94-180 by a photographic presentation of their "Vico collaborations".

  11. Isolation of Brucella inopinata-Like Bacteria from White's and Denny's Tree Frogs.

    Science.gov (United States)

    Kimura, Masanobu; Une, Yumi; Suzuki, Michio; Park, Eun-Sil; Imaoka, Koichi; Morikawa, Shigeru

    2017-05-01

    Brucella inopinata strain BO1 and B. sp. strain BO2 isolated from human patients, respectively, are genetically different from classical Brucella species. We isolated bacteria of the genus Brucella from two species of wild-caught tropical frogs kept in the facilities in Japan: White's tree frog, which inhabits Oceania, and Denny's tree frog, which inhabits Southeast Asia. Phylogenetic analyses based on 16S rRNA and recA gene sequences and multilocus sequence analysis showed that two isolates of Brucella spp. showed significant similarity to BO1, BO2, and the isolates from other wild-caught frogs. These results suggest that a variety of frog species are susceptible to a novel clade of Brucella bacteria, including B. inopinata.

  12. Optical spectrophotometry of Wolf-Rayet galaxies

    Science.gov (United States)

    Vacca, William D.; Conti, Peter S.

    1992-01-01

    We have obtained long-slit optical spectra of 10 Wolf-Rayet galaxies and four other starburst galaxies. Using the nebular emission lines we have determined the electron temperatures, electron densities, extinctions, oxygen abundances, mass of ionized hydrogen, and numbers of ionizing photons due to hot stars in these galaxies. The various forbidden line ratios clearly indicate a stellar origin for the emission-line spectrum. From the flux of the broad He II 4686 A emission feature we have estimated the number of Wolf-Rayet stars present. We have accounted for the contribution of these stars to the total ionizing flux and have calculated the ratio of the number of these stars to the number of O stars. Wolf-Rayet galaxies are among the youngest examples of the starburst phenomenon, which we observed at a propitious moment.

  13. Volney B. Palmer, 1799-1864: The Nation's First Advertising Agency Man.

    Science.gov (United States)

    Holland, Donald R.

    This monograph examines the life of Volney B. Palmer, who was the prototype of the modern advertising person. The first section discusses his background and early experience in Pennsylvania. The second section discusses the American Newspaper Agency, established as the first advertising agency in 1842. The third section examines the kind of man…

  14. Evidence for increasingly variable Palmer Drought Severity Index in the United States since 1895.

    Science.gov (United States)

    Rayne, Sierra; Forest, Kaya

    2016-02-15

    Annual and summertime trends towards increasingly variable values of the Palmer Drought Severity Index (PDSI) over a sub-decadal period (five years) were investigated within the contiguous United States between 1895 and the present. For the contiguous United States as a whole, there is a significant increasing trend in the five-year running minimum-maximum ranges for the annual PDSI (aPDSI5 yr(min|max, range)). During this time frame, the average aPDSI5 yr(min|max, range) has increased by about one full unit, indicating a substantial increase in drought variability over short time scales across the United States. The end members of the running aPDSI5 yr(min|max, range) highlight even more rapid changes in the drought index variability within the past 120 years. This increasing variability in the aPDSI5 yr(min|max, range) is driven primarily by changes taking place in the Pacific and Atlantic Ocean coastal climate regions, climate regions which collectively comprise one-third the area of the contiguous United States. Similar trends were found for the annual and summertime Palmer Hydrological Drought Index (PHDI), the Palmer Modified Drought Index (PMDI), and the Palmer Z Index (PZI). Overall, interannual drought patterns in the contiguous United States are becoming more extreme and difficult to predict, posing a challenge to agricultural and other water-resource related planning efforts. Copyright © 2015 Elsevier B.V. All rights reserved.

  15. Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2017 October-December

    Science.gov (United States)

    Warner, Brian D.

    2018-04-01

    Lightcurves for 18 main-belt asteroids were obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2017 October-December. All but one of the asteroids were targets of opportunity, i.e., in the field of planned targets, which demonstrates a good reason for data mining images.

  16. Palmer Quest: A Feasible Nuclear Fission "Vision Mission" to the Mars Polar Caps

    Science.gov (United States)

    Carsey, F. D.; Beegle, L. W.; Nakagawa, R.; Elliott, J. O.; Matthews, J. B.; Coleman, M. L.; Hecht, M. H.; Ivaniov, A. B.; Head, J. W.; Milkovich, S.

    2005-01-01

    We are engaged in a NASA Vision Mission study, called Palmer Quest after the American Antarctic explorer Nathaniel Palmer, to assess the presence of life and evaluate the habitability of the basal domain of the Mars polar caps. We address this goal through four objectives: 1. Determine the presence of amino acids, nutrients, and geochemical heterogeneity in the ice sheet. 2. Quantify and characterize the provenance of the amino acids in Mars ice. 3. Assess the stratification of outcropped units for indications of habitable zones. 4. Determine the accumulation of ice, mineralogic material, and amino acids in Mars ice caps over the present epoch. Because of the defined scientific goal for the vision mission, the Palmer Quest focus is astrobiological; however, the results of the study make us optimistic that aggressive multi-platform in-situ missions that address a wide range of objectives, such as climate change, can be supported by variations of the approach used on this mission. Mission Overview: The Palmer Quest baseline

  17. WR 143: A Wolf-Rayet Binary

    OpenAIRE

    Varricatt, Watson P.; Ashok, Nagarhalli M.

    2005-01-01

    Near infrared spectroscopy and photometry of the Wolf-Rayet Star WR 143 (HD 195177) were obtained in the $JHK$ photometric bands. High resolution spectra observed in the J and H bands exhibit narrow 1.083-micron He I line and the H I Pa Beta and the Brackett series lines in emission superposed on the broad emission line spectrum of the Wolf-Rayet star, giving strong indications of the presence of a companion. From the narrow emission lines observed, the companion is identified to be an early-...

  18. O stars and Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Conti, P.S.; Underhill, A.B.; Jordan, S.; Thomas, R.

    1988-01-01

    Basic information is given about O and Wolf-Rayet stars indicating how these stars are defined and what their chief observable properties are. Part 2 of the volume discussed four related themes pertaining to the hottest and most luminous stars. Presented are: an observational overview of the spectroscopic classification and extrinsic properties of O and Wolf-Rayet stars; the intrinsic parameters of luminosity, effective temperature, mass, and composition of the stars, and a discussion of their viability; stellar wind properties; and the related issues concerning the efforts of stellar radiation and wind on the immediate interstellar environment are presented

  19. O stars and Wolf-Rayet stars

    Science.gov (United States)

    Conti, Peter S.; Underhill, Anne B.; Jordan, Stuart (Editor); Thomas, Richard (Editor)

    1988-01-01

    Basic information is given about O and Wolf-Rayet stars indicating how these stars are defined and what their chief observable properties are. Part 2 of the volume discussed four related themes pertaining to the hottest and most luminous stars. Presented are: an observational overview of the spectroscopic classification and extrinsic properties of O and Wolf-Rayet stars; the intrinsic parameters of luminosity, effective temperature, mass, and composition of the stars, and a discussion of their viability; stellar wind properties; and the related issues concerning the efforts of stellar radiation and wind on the immediate interstellar environment are presented.

  20. "We shall have to make the best of it": The conversion of Dennis Sciama

    Science.gov (United States)

    Hunt, James Christopher

    The cosmologist Dennis W. Sciama (1926-1999) was a long-standing advocate of the steady state model of the universe. This theory, originally proposed in 1948 by Hermann Bondi, Thomas Gold, and Fred Hoyle, suggested that the universe was eternal, and unchanging on the largest scales. Contrary to the popular image of a scientist as a dispassionate, unbiased investigator of nature, Sciama fervently hoped the steady state model to be correct. In addition, and also pace the stereotypical image of a scientist, Sciama was motivated significantly by "extrascientific" or aesthetic factors in his adoption of the model. Finally, Sciama, in a stark contrast to the naive falsificationism usually presented as a virtue of the "scientific method," went through a several-year period of attempting to "save" the model from hostile data. However, Sciama abandoned the model in 1966 due to increasingly reliable data relating to the distribution of quasars. Thus the Sciama case also stands as a counterexample to irrationalist criticisms of science, according to which scientists can and will always find ways to hold on to their "pet" theories until they die, regardless of contradictory data. Sciama's conversion also sheds light on the iterative process that goes on as scientists localize and attempt to repair faults in their theories.

  1. Music Activities for "Little Wolf's Song"

    Science.gov (United States)

    Cardany, Audrey Berger

    2015-01-01

    Drawn from Britta Techentrup's children's book "Little Wolf's Song", the author shares music activities appropriate for preschool and children in primary grades. Children will enjoy Technentrup's tender family story, while exploring vocal and instrumental timbres, as well as reading, writing, and creating with melodic contour.

  2. No N = 4 strings on Wolf spaces

    International Nuclear Information System (INIS)

    Gates, S.J. Jr.; Ketov, S.V.

    1995-02-01

    We generalize the standard N=2 supersymmetric Kazama-Suzuki coset construction to the N=4 case by requiring the non-linear (Goddard-Schwimmer) N=4 quasi-superconformal algebra to be realized on cosets. The constraints that we find allow very simple geometrical interpretation and have the Wolf spaces as their natural solutions. Our results obtained by using components-level superconformal field theory methods are fully consistent with standard results about N=4 supersymmetric two-dimensional nonlinear sigma-models and N=4 WZNW models on Wolf spaces. We construct the actions for the latter and express the quaternionic structure, appearing in the N=4 coset solution, in terms of the symplectic structure associated with the underlying Freudenthal triple system. Next, we gauge the N=4 QSCA and build a quantum BRST charge for the N=4 string propagating on a Wolf space. Surprisingly, the BRST charge nilpotency conditions rule out the non-trivial Wolf spaces as consistent string backgrounds. (orig.)

  3. Caroline B. Palmer: Pioneer Physician Anesthetist and First Chair of Anesthesia at Stanford.

    Science.gov (United States)

    Brodsky, Jay B; Saidman, Lawrence J

    2015-12-01

    Caroline B. Palmer was appointed as Chief of Anesthesia at Cooper Medical College (soon renamed as Stanford Medical School) in 1909. For the next 28 years, she was an innovative leader, a clinical researcher, and a strong advocate for recognition of anesthesiology as a medical specialty. To honor her accomplishments, the operating room suite in the new Stanford Hospital will be named after this pioneering woman anesthesiologist.

  4. Comparing the Palmer Drought Index and the Standardized Precipitation Index for Zagreb Gric Observatory

    Science.gov (United States)

    Pandzic, K.; Likso, T.

    2012-04-01

    Conventional Palmer Drought Index (PDI) and recent Standardized Precipitation Index (SPI) for Zagreb Gric Observatory are compared by spectral analysis technique. Data for a period 1862-2010 are used. The results indicate that SPI is simpler for interpretation but PDI more comprehensive index. On the other side, lack of temperature within SPI, make impossible application of it on climate change interpretation. Possible applications of them in irrigation scheduling system is considered as well for drought risk assessment.

  5. Differentiability of Palmer's linearization Theorem and converse result for density functions

    OpenAIRE

    Castañeda, Alvaro; Robledo, Gonzalo

    2014-01-01

    We study differentiability properties in a particular case of the Palmer's linearization Theorem, which states the existence of an homeomorphism $H$ between the solutions of a linear ODE system having exponential dichotomy and a quasilinear system. Indeed, if the linear system is uniformly asymptotically stable, sufficient conditions ensuring that $H$ is a $C^{2}$ preserving orientation diffeomorphism are given. As an application, we generalize a converse result of density functions for a non...

  6. El palmeral de Elche: patrimonio, gestión y turismo

    Directory of Open Access Journals (Sweden)

    José Antonio Larrosa Rocamora

    2003-01-01

    Full Text Available El palmeral histórico de Elche es un sistema agrícola de origen árabe estructurado en parcelas rectangulares, en cuyos límites están plantadas las palmeras. El indudable valor patrimonial de este espacio, protegido legalmente desde 1933, ha sido reafirmado y aumentado en la década de 1990 gracias a la ampliación del concepto de patrimonio hacia los bienes de la tradición popular: fiestas, actividades, técnicas, etc. En este contexto, la UNESCO declaró el palmeral histórico de Elche como Patrimonio de la Humanidad en el año 2000, y con ello se han abierto las puertas del desarrollo del turismo en la ciudad. Sin embargo, la gestión de este espacio no ha sido ni es la más adecuada, en parte debido a la falsa imagen que ha trascendido del palmeral como jardín exótico, imagen que ha sido reproducida en muchos huertos abiertos al público en general y a la actividad turística en particular. La aparición en los últimos años de nuevas tendencias motivacionales en la demanda turística, entre las cuales se halla el aumento de la valoración y la búsqueda de todo lo relacionado con la cultura, abre nuevas posibilidades al desarrollo de un turismo que ayude a proteger y a conservar el palmeral con su impronta agrícola intacta.

  7. Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2017 October-December

    Science.gov (United States)

    Warner, Brian D.

    2018-04-01

    Lightcurves for 20 near-Earth asteroids (NEAs) obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2017 October-December were analyzed for rotation period and signs of satellites or tumbling. The results for 7336 Saunders are based on data obtained in 2017 August and revise the original period of 3.36 h to 4.311 h. Preliminary shape and spin axis models are given for 1864 Daedalus and (17511) 1992 QN.

  8. Project CONVERGE: Initial Results From the Mapping of Surface Currents in Palmer Deep

    Science.gov (United States)

    Statscewich, H.; Kohut, J. T.; Winsor, P.; Oliver, M. J.; Bernard, K. S.; Cimino, M. A.; Fraser, W.

    2016-02-01

    The Palmer Deep submarine canyon on the Western Antarctic Peninsula provides a conduit for upwelling of relatively warm, nutrient rich waters which enhance local primary production and support a food web productive enough to sustain a large top predator biomass. In an analysis of ten years of satellite-tagged penguins, Oliver et al. (2013) showed that circulation features associated with tidal flows may be a key driver of nearshore predator distributions. During diurnal tides, the penguins feed close to their breeding colonies and during semi-diurnal tides, the penguins make foraging trips to the more distant regions of Palmer Deep. It is hypothesized that convergent features act to concentrate primary producers and aggregate schools of krill that influence the behavior of predator species. The initial results from a six month deployment of a High Frequency Radar network in Palmer Deep are presented in an attempt to characterize and quantify convergent features. During a three month period from January through March 2015, we conducted in situ sampling consisting of multiple underwater glider deployments, small boat acoustic surveys of Antarctic krill, and penguin ARGOS-linked satellite telemetry and time-depth recorders (TDRs). The combination of real-time surface current maps with adaptive in situ sampling introduces High Frequency Radar to the Antarctic in a way that allows us to rigorously and efficiently test the influence of local tidal processes on top predator foraging ecology.

  9. The WO Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Barlow, M.J.

    1982-01-01

    Sanduleak (1971) has listed five stars, not apparently associated with planetary nebulae, which show very strong O VI 3811.34 A emission. He pointed out that two of them are in the Magellanic Clouds and have absolute magnitudes comparable to those of classical (Population I) Wolf-Rayet stars. O VI emission is known to occur in some classical Wolf-Rayet stars, but not with the extreme strength shown by the Sanduleak stars. The authors have obtained absolute optical spectrophotometry (3100 - 7400 A) of all five of these stars, using the UCL Image Photon Counting System and RGO Spectrograph on the Anglo-Australian Telescope. Their relative flux distributions are shown. Inspection shows that Sand 1 is very lightly reddened, Sand 2 and 3 have intermediate reddening, and Sand 4 and 5 are heavily reddened. IUE ultraviolet spectrophotometry has been obtained of the first three stars; Sand 4 and 5 are too heavily reddened for IUE spectra to be feasible. (Auth.)

  10. Higher spin currents in orthogonal Wolf space

    International Nuclear Information System (INIS)

    Ahn, Changhyun; Paeng, Jinsub

    2015-01-01

    For the N=4 superconformal coset theory by ((SO(N+4))/(SO(N)×SU(2)))×U(1) (that contains an orthogonal Wolf space) with N = 4, the N=2 WZW affine current algebra is obtained. The 16 generators (or 11 generators) of the large N=4 linear (or nonlinear) superconformal algebra are described by these WZW affine currents explicitly. Along the line of large N=4 holography, the extra 16 currents with spins (2,(5/2),(5/2),3), ((5/2),3,3,(7/2)), ((5/2),3,3,(7/2)), and (3,(7/2),(7/2),4) are obtained in terms of the WZW affine currents. The lowest spin of this N=4 multiplet is two rather than one, which is for a unitary Wolf space. The operator product expansions between the above 11 currents and these extra 16 higher spin currents are found explicitly. (paper)

  11. The Wolf 630 moving group of stars

    International Nuclear Information System (INIS)

    McDonald, A.R.E.; Hearnshaw, J.B.; Canterbury Univ., Christchurch

    1983-01-01

    An analysis is made of the probability of collective membership of the stars assigned by Eggen to the Wolf 630 moving group. This probability is estimated from the scatter of points in the colour-absolute magnitude diagram when compared to the intrinsic scatter observed for M67. Particular attention is paid to the random errors for all the observed and deduced stellar parameters. Results show that either the observational errors must be about 2.4 times larger than given in the proper motion and radial velocity source catalogues, or the intrinsic scatter in the colour-magnitude diagram for the Wolf 630 group must be much larger than for M67, or many of the stars considered cannot be members. (author)

  12. WOLF RAYETS: INTERFEROMETRY OF HOT DUST

    OpenAIRE

    J. Rajagopal

    2010-01-01

    Las Wolf Rayets (WRs) son estrellas masivas calientes en sus ltimas etapas evolutivas. Son indicadores prominentes de la formaci n de estrellas de gran masa y sus vientos masivos tienen in uencia signi cativa en el medio interestelar. Es sabido que un peque o pero signi cativo n mero de estas estrellas en la galaxia producen copiosas cantidades de polvo. Dado el hostil ambiente circunestelar, esto plantea preguntas interesantes. Las observaciones interferom tricas y de abertura de m scara in...

  13. Population genomics of the inbred Scandinavian wolf

    OpenAIRE

    Hagenblad, Jenny; Olsson, Maria; Parker, Heidi G.; Ostrander, Elaine A.; Ellegren, Hans

    2009-01-01

    The Scandinavian wolf population represents one of the genetically most well characterized examples of a severely bottlenecked natural population (with only two founders), and of how the addition of new genetic material (one immigrant) can at least temporarily provide a “genetic rescue”. However, inbreeding depression has been observed in this population and in the absence of additional immigrants, its long-term viability is questioned. To study the effects of inbreeding and selection on geno...

  14. Wolf--Rayet stars of M33

    International Nuclear Information System (INIS)

    Corso, G.J. Jr.

    1975-01-01

    A comprehensive study of the 54 known Wolf--Rayet stars of M33 is undertaken with the intention of improving our knowledge of the Wolf--Rayet phenomenon, identifying significant features of their distribution in an Sc galaxy, and discerning possible trends in the variation of chemical composition of the interstellar medium from place to place within that galaxy. Thirty-seven of these stars were classified for the first time into carbon and nitrogen sequences on the basis of photographic photometry of image tube plates obtained with the Kitt Peak 84-inch telescope and an ITT magnetically focused image tube equipped with a set of narrow-band interference filters designed to isolate the broad emission features between 4640 A and 4686 A due to N III, C III-IV, and He II. The subclasses WC6-9, missing in the Large Magellanic Cloud, were found in M33, although there is a tendency for the known stars of both sequences to belong to the high-excitation subclasses. The distribution of these stars was compared with the distributions of luminous blue stars, dust, and H II regions. Star counts on the image tube plates indicated that one out of every 75 stars in M33 brighter than M/sub B/ = --4.5 is a Wolf--Rayet star

  15. The relationships between the maned wolf and people

    OpenAIRE

    Consorte-McCrea, A.

    2013-01-01

    The maned wolf is a large carnivore, the largest one in South America. Although it was described as a wolf by early agents of the Portuguese crown, it is monophyletic and therefore difficult to mistake with any other species. The fact that the maned wolf is unique and distinctive is important if its image is to represent the Cerrado biome and all of its dwindling biodiversity. Do people’s relationships with the maned wolf make it charismatic and likable enough to earn the badge of flagship sp...

  16. Wolf predation on caribou calves in Denali National Park, Alaska

    Science.gov (United States)

    Adams, Layne G.; Dale, B.; Mech, L. David; Carbyn, Ludwig N.; Fritts, Steven H.; Seip, Dale R.

    1995-01-01

    During 1987-1991, 29 to 45 radio-collared caribou cows were monitored daily during calving each year and their calves were radio-collared (n = 147 calves) to investigate calf production and survival. We determined characteristics of wolf predation on caribou calves and, utilizing information from a companion wolf study, evaluated the role of spacing by caribou cows in minimizing wolf predation on neonates (calves wolf abundance doubled. On average, 49% of the neonates died, ranging from 30% in 1987 to 71% in 1991. Overall, wolves killed 22% of the neonates produced and were the most important mortality agent. Wolves preyed on calves primarily during six days following the peak of calving and usually killed calves five to 15 days old. The mortality rate for neonates was strongly inversely correlated with average birthweight. Neonatal losses to wolves were also correlated with birthweight but not spring wolf density or mean calving elevation. Caribou concentrated on a calving ground when spring snow conditions allowed and adjusted their distribution on the calving ground depending on snow conditions and wolf distribution and abundance. Even though the wolf population doubled, the exposure of caribou calves to wolf predation did not increase, when spacing by caribou at the wolf pack territory scale was accounted for.

  17. Are luminous and metal-rich Wolf Rayet stars inflated?

    NARCIS (Netherlands)

    Petrovic, J.; Pols, O.; Langer, N.

    2006-01-01

    Aims. We investigate the influence of metallicity and stellar wind mass loss on the radius of Wolf-Rayet stars. Methods. We have calculated chemically homogeneous models of Wolf-Rayet stars of 10 to 200 M for two metallicities (Z = 0.02 and Z = 0.001), without mass loss, using OPAL opacities. We

  18. Long GRBs from binary stars: runaway, Wolf-Rayet progenitors

    NARCIS (Netherlands)

    Cantiello, M.; Yoon, S.C.; Langer, N.; Livio, M.

    2007-01-01

    The collapsar model for long gamma-ray bursts requires a rapidly rotating Wolf-Rayet star as progenitor. We test the idea of producing rapidly rotating Wolf-Rayet stars in massive close binaries through mass accretion and consecutive quasi-chemically homogeneous evolution — the latter had previously

  19. Long GRBs from Binary Stars: Runaway, Wolf-Rayet Progenitors

    NARCIS (Netherlands)

    Cantiello, M.; Yoon, S.C.; Langer, N.; Livio, M.

    2007-01-01

    The collapsar model for long gamma-ray bursts requires a rapidly rotating Wolf-Rayet star as progenitor. We test the idea of producing rapidly rotating Wolf-Rayet stars in massive close binaries through mass accretion and consecutive quasi-chemically homogeneous evolution - the latter had previously

  20. Wolf's syndrome in a neonatal period: new find neuroradiology

    International Nuclear Information System (INIS)

    Gracia Chapulle, A.; Alvarez Villa, A.; Diaz Diaz, E.; Lopez Suarez, Y.

    1992-01-01

    We report a new born patient with Wolf's syndrome. We contribute with the most frequently clinical, genetics and radiological findings including a radiological discovery linked a malformation of the central nervous system, consistent in a genesia of the corpus callosum , not described so far in the reviewed literature about the Wolf syndrome. (author)

  1. Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 December - 2009 March

    Science.gov (United States)

    Warner, Brian D.

    2009-07-01

    Lightcurves for 34 asteroids were obtained at the Palmer Divide Observatory from 2008 December through 2009 March: 91 Aegina, 261 Prymno, 359 Georgia, 402 Chloe, 497 Iva, 506 Marion, 660 Crescentia, 691 Lehigh, 731 Sorga, 779 Nina, 802 Epyaxa, 908 Buda, 1015 Christa, 1518 Rovaniemi, 1600 Vyssotsky, 1656 Suomi, 2000 Herschel, 2735 Ellen, 3169 Ostro, 3854 George, 3940 Larion, (5558) 1989 WL2, (5747) 1991 CO3, 6517 Buzzi, (11304) 1993 DJ, (22195) 3509 P-L, (26383) 1999 MA2, (29780) 1999 CJ50, (45878) 2000 WX29, (45898) 2000 XQ49, (76800) 2000 OQ35, (76929) 2001 AX34, (87343) 2000 QH25, and (207398) 2006 AS2.

  2. Construction of prediction intervals for Palmer Drought Severity Index using bootstrap

    Science.gov (United States)

    Beyaztas, Ufuk; Bickici Arikan, Bugrayhan; Beyaztas, Beste Hamiye; Kahya, Ercan

    2018-04-01

    In this study, we propose an approach based on the residual-based bootstrap method to obtain valid prediction intervals using monthly, short-term (three-months) and mid-term (six-months) drought observations. The effects of North Atlantic and Arctic Oscillation indexes on the constructed prediction intervals are also examined. Performance of the proposed approach is evaluated for the Palmer Drought Severity Index (PDSI) obtained from Konya closed basin located in Central Anatolia, Turkey. The finite sample properties of the proposed method are further illustrated by an extensive simulation study. Our results revealed that the proposed approach is capable of producing valid prediction intervals for future PDSI values.

  3. Tractable approximations for probabilistic models: The adaptive Thouless-Anderson-Palmer mean field approach

    DEFF Research Database (Denmark)

    Opper, Manfred; Winther, Ole

    2001-01-01

    We develop an advanced mean held method for approximating averages in probabilistic data models that is based on the Thouless-Anderson-Palmer (TAP) approach of disorder physics. In contrast to conventional TAP. where the knowledge of the distribution of couplings between the random variables...... is required. our method adapts to the concrete couplings. We demonstrate the validity of our approach, which is so far restricted to models with nonglassy behavior? by replica calculations for a wide class of models as well as by simulations for a real data set....

  4. Migratory urge and gll Na+,K+-ATPase activity of hatchery-reared Atlantic salmon smolts from the Dennys and Penobscot River stocks, Maine

    Science.gov (United States)

    Spencer, Randall C.; Zydlewski, Joseph D.; Zydlewski, Gayle B.

    2010-01-01

    Hatchery-reared Atlantic salmon Salmo salar smolts produced from captive-reared Dennys River and sea-run Penobscot River broodstock are released into their source rivers in Maine. The adult return rate of Dennys smolts is comparatively low, and disparity in smolt quality between stocks resulting from genetic or broodstock rearing effects is plausible. Smolt behavior and physiology were assessed during sequential 14-d trials conducted in seminatural annular tanks with circular flow. “Migratory urge” (downstream movement) was monitored remotely using passive integrated transponder tags, and gill Na+,K+-ATPase activity was measured at the beginning and end of the trials to provide an index of smolt development. The migratory urge of both stocks was low in early April, increased 20-fold through late May, and declined by the end of June. The frequency and seasonal distribution of downstream movement were independent of stock. In March and April, initial gill Na+,K+-ATPase activities of Penobscot River smolts were lower than those of Dennys River smolts. For these trials, however, Penobscot River smolts increased enzyme activity after exposure to the tank, whereas Dennys River smolts did not, resulting in similar activities between stocks at the end of all trials. There was no clear relationship between migratory urge and gill Na+,K+-ATPase activity. Gill Na+,K+-ATPase activity of both stocks increased in advance of migratory urge and then declined while migratory urge was increasing. Maximum movement was observed from 2 h after sunset through 1 h after sunrise but varied seasonally. Dennys River smolts were slightly more nocturnal than Penobscot River smolts. These data suggest that Dennys and Penobscot River stocks are not markedly different in either physiological or behavioral expression of smolting.

  5. Bear-baiting may exacerbate wolf-hunting dog conflict.

    Directory of Open Access Journals (Sweden)

    Joseph K Bump

    Full Text Available BACKGROUND: The influence of policy on the incidence of human-wildlife conflict can be complex and not entirely anticipated. Policies for managing bear hunter success and depredation on hunting dogs by wolves represent an important case because with increasing wolves, depredations are expected to increase. This case is challenging because compensation for wolf depredation on hunting dogs as compared to livestock is less common and more likely to be opposed. Therefore, actions that minimize the likelihood of such conflicts are a conservation need. METHODOLOGY/PRINCIPAL FINDINGS: We used data from two US states with similar wolf populations but markedly different wolf/hunting dog depredation patterns to examine the influence of bear hunting regulations, bear hunter to wolf ratios, hunter method, and hunter effort on wolf depredation trends. Results indicated that the ratio of bear hunting permits sold per wolf, and hunter method are important factors affecting wolf depredation trends in the Upper Great Lakes region, but strong differences exist between Michigan and Wisconsin related in part to the timing and duration of bear-baiting (i.e., free feeding. The probability that a wolf depredated a bear-hunting dog increases with the duration of bear-baiting, resulting in a relative risk of depredation 2.12-7.22× greater in Wisconsin than Michigan. The net effect of compensation for hunting dog depredation in Wisconsin may also contribute to the difference between states. CONCLUSIONS/SIGNIFICANCE: These results identified a potential tradeoff between bear hunting success and wolf/bear-hunting dog conflict. These results indicate that management options to minimize conflict exist, such as adjusting baiting regulations. If reducing depredations is an important goal, this analysis indicates that actions aside from (or in addition to reducing wolf abundance might achieve that goal. This study also stresses the need to better understand the relationship

  6. Bear-baiting may exacerbate wolf-hunting dog conflict.

    Science.gov (United States)

    Bump, Joseph K; Murawski, Chelsea M; Kartano, Linda M; Beyer, Dean E; Roell, Brian J

    2013-01-01

    The influence of policy on the incidence of human-wildlife conflict can be complex and not entirely anticipated. Policies for managing bear hunter success and depredation on hunting dogs by wolves represent an important case because with increasing wolves, depredations are expected to increase. This case is challenging because compensation for wolf depredation on hunting dogs as compared to livestock is less common and more likely to be opposed. Therefore, actions that minimize the likelihood of such conflicts are a conservation need. We used data from two US states with similar wolf populations but markedly different wolf/hunting dog depredation patterns to examine the influence of bear hunting regulations, bear hunter to wolf ratios, hunter method, and hunter effort on wolf depredation trends. Results indicated that the ratio of bear hunting permits sold per wolf, and hunter method are important factors affecting wolf depredation trends in the Upper Great Lakes region, but strong differences exist between Michigan and Wisconsin related in part to the timing and duration of bear-baiting (i.e., free feeding). The probability that a wolf depredated a bear-hunting dog increases with the duration of bear-baiting, resulting in a relative risk of depredation 2.12-7.22× greater in Wisconsin than Michigan. The net effect of compensation for hunting dog depredation in Wisconsin may also contribute to the difference between states. These results identified a potential tradeoff between bear hunting success and wolf/bear-hunting dog conflict. These results indicate that management options to minimize conflict exist, such as adjusting baiting regulations. If reducing depredations is an important goal, this analysis indicates that actions aside from (or in addition to) reducing wolf abundance might achieve that goal. This study also stresses the need to better understand the relationship among baiting practices, the effect of compensation on hunter behavior, and depredation

  7. Infections and parasitic diseases of the gray wolf and their potential effects on wolf populations in North America.

    Science.gov (United States)

    Brand, C.J.; Pybus, M.J.; Ballard, W.B.; Peterson, R.O.

    1995-01-01

    Numerous infections and parasitic diseases have been reported for the gray wolf, including more than 10 viral, bacterial, and mycotic disease and more than 70 species of helminths and ectoparasites. However, few studies have documented the role of diseases in population dynamics. Disease can affect wolf populations directly by causing mortality or indirectly by affecting physiological and homeostatic processes, thriftiness, reproduction, behavior, or social structure. In addition, wolves are hosts to diseases that can affect prey species, thus affecting wolf populations indirectly by reducing prey abundance or increasing vulnerability to predation. Diseases such as canine distemper and infectious canine hepatitis are enzootic in wolf populations, whereas rabies occurs in wolves primarily as a result of transmission from other species such as artic and red foxes. Contact between wolves and domestic pets and livestock may affect the composition of diseases in wolves and their effects on wolf populations. Dogs were suspected of introducing lice and canine parovirus to several wolf populations. THe potential for disease to affect wolf populations and other wild and domestic animals should be considered in wolf management plans, particularly in plans for reintroduction of wolves to area within their former range.

  8. Characterization of the Wolf 1061 Planetary System

    Energy Technology Data Exchange (ETDEWEB)

    Kane, Stephen R.; Waters, Miranda A. [Department of Physics and Astronomy, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132 (United States); Von Braun, Kaspar [Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001 (United States); Henry, Gregory W. [Center of Excellence in Information Systems, Tennessee State University, 3500 John A. Merritt Blvd., Box 9501, Nashville, TN 37209 (United States); Boyajian, Tabetha S. [Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803 (United States); Mann, Andrew W., E-mail: skane@sfsu.edu [Department of Astronomy, University of Texas at Austin, Austin, TX 78712 (United States)

    2017-02-01

    A critical component of exoplanetary studies is an exhaustive characterization of the host star, from which the planetary properties are frequently derived. Of particular value are the radius, temperature, and luminosity, which are key stellar parameters for studies of transit and habitability science. Here we present the results of new observations of Wolf 1061, known to host three super-Earths. Our observations from the Center for High Angular Resolution Astronomy interferometric array provide a direct stellar radius measurement of 0.3207±0.0088 R{sub ⊙}, from which we calculate the effective temperature and luminosity using spectral energy distribution models. We obtained 7 yr of precise, automated photometry that reveals the correct stellar rotation period of 89.3±1.8 days, finds no evidence of photometric transits, and confirms that the radial velocity signals are not due to stellar activity. Finally, our stellar properties are used to calculate the extent of the Habitable Zone (HZ) for the Wolf 1061 system, for which the optimistic boundaries are 0.09–0.23 au. Our simulations of the planetary orbital dynamics show that the eccentricity of the HZ planet oscillates to values as high as ∼0.15 as it exchanges angular momentum with the other planets in the system.

  9. Wolf, wolf

    African Journals Online (AJOL)

    Owner

    Venter slaag uitstekend om die binnewêreld van die pornoverslaafde te verwoord. Ontnugtering is onafwendbaar, want dié soort bevrediging is beperkend. Mattheüs ervaar afstomping weens sy porno- verslawing; in sy geheue kan hy nie meer.

  10. Computer simulation of wolf-removal strategies for animal damage control

    Science.gov (United States)

    Robert G. Haight; Laurel E. Travis; Kevin Nimerfro; L. David Mech

    2002-01-01

    Because of the sustained growth of the gray wolf (Canis lupus) population in the western Great Lakes region of the United States, management agencies are anticipating gray wolf removal from the federal endangered species list and are proposing strategies for wolf management. Strategies are needed that would balance conflicting public demands for wolf...

  11. Bürgerengagement und Protestpolitik. Das politische Wirken des „Remstalrebellen“ Helmut Palmer und die Reaktionen seiner Mitmenschen

    OpenAIRE

    Knauer, Jan

    2011-01-01

    Die Dissertation untersucht politische Kommunikation, Protestpolitik und Bürgerengagement in der Bundesrepublik anhand des politischen Einzelkämpfers Helmut Palmer (1930-2004), des „Remstalrebellen“. Helmut Palmer zählt zu den bemerkenswertesten Persönlichkeiten in der Geschichte des Bundeslandes Baden-Württemberg. Mit seinem Wirken als Protestpolitiker ohne Unterstützung durch eine Organisation oder Partei prägte er seit den 1960er Jahren in ca. 300 Bürgermeister-, Landtags- und Bundestagswa...

  12. Loneliness and associated violent antisocial behavior: analysis of the case reports of Jeffrey Dahmer and Dennis Nilsen.

    Science.gov (United States)

    Martens, Willem H J; Palermo, George B

    2005-06-01

    It can be theorized that loneliness plays a significant role in the development and continuation of violent, antisocial attitudes and behavior. Analysis of case reports of two serial killers, Dennis Nilsen and Jeffrey Dahmer, indicate that there is evidence for such a link. In this article, a list of significant correlates of loneliness and antisocial behavior is presented. This may be useful for the assessment of possible dangerousness and in the development of prevention and intervention programs. Suggestions are made for the adequate treatment of loneliness and correlated violent, antisocial behavior. A need is recognized for more research into the psychosocial, emotional, neurobiological, cultural, and ethnic determinants of loneliness and their correlation to specific antisocial and/or criminal behavior.

  13. Evaluating prey switching in wolf-ungulate systems.

    Science.gov (United States)

    Garrott, Robert A; Bruggeman, Jason E; Becker, Matthew S; Kalinowski, Steven T; White, P J

    2007-09-01

    Wolf restoration has become a widely accepted conservation and management practice throughout North America and Europe, though the ecosystem effects of returning top carnivores remain both scientific and societal controversies. Mathematical models predicting and describing wolf-ungulate interactions are typically limited to the wolves' primary prey, with the potential for prey switching in wolf-multiple-ungulate systems only suggested or assumed by a number of investigators. We used insights gained from experiments on small taxa and field data from ongoing wolf-ungulate studies to construct a model of predator diet composition for a wolf-elk-bison system in Yellowstone National Park, Wyoming, USA. The model explicitly incorporates differential vulnerability of the ungulate prey types to predation, predator preference, differences in prey biomass, and the possibility of prey switching. Our model demonstrates wolf diet shifts with changes in relative abundance of the two prey, with the dynamics of this shift dependent on the combined influences of preference, differential vulnerability, relative abundances of prey, and whether or not switching occurs. Differences in vulnerability between elk and bison, and strong wolf preference for elk, result in an abrupt dietary shift occurring only when elk are very rare relative to bison, whereas incorporating switching initiates the dietary shift more gradually and at higher bison-elk ratios. We demonstrate how researchers can apply these equations in newly restored wolf-two-prey systems to empirically evaluate whether prey switching is occurring. Each coefficient in the model has a biological interpretation, and most can be directly estimated from empirical data collected from field studies. Given the potential for switching to dramatically influence predator-prey dynamics and the wide range of expected prey types and abundances in some systems where wolves are present and/or being restored, we suggest that this is an

  14. A 2D view of Wolf-Rayet Galaxies

    OpenAIRE

    Srivastava, S.; Kehrig, C.; Kantharia, N. G.; Pérez-Montero, E.; Vílchez, J. M.; Iglesias-Páramo, J.; Janardhan, P.

    2015-01-01

    The main objective of this work is to investigate the evolution of massive stars, and the interplay between them and the ionized gas for a sample of local metal-poor Wolf-Rayet galaxies. Optical integral field spectrocopy was used in combination with multi-wavelength radio data. Combining optical and radio data, we locate Wolf-Rayet stars and supernova remnants across the Wolf-Rayet galaxies to study the spatial correlation between them. This study will shed light on the massive star fo...

  15. 26Al yields from rotating Wolf--Rayet star models

    OpenAIRE

    Vuissoz, C.; Meynet, G.; Knoedlseder, J.; Cervino, M.; Schaerer, D.; Palacios, A.; Mowlavi, N.

    2003-01-01

    We present new $^{26}$Al stellar yields from rotating Wolf--Rayet stellar models which, at solar metallicity, well reproduce the observed properties of the Wolf-Rayet populations. These new yields are enhanced with respect to non--rotating models, even with respect to non--rotating models computed with enhanced mass loss rates. We briefly discuss some implications of the use of these new yields for estimating the global contribution of Wolf-Rayet stars to the quantity of $^{26}$Al now present...

  16. Hot mantles, moderate photospheres for Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Underhill, A.B.

    1982-01-01

    The amount of continuous energy from Wolf-Rayet stars and the shape of the continuous spectrum from the ultraviolet to the near infrared correspond to effective temperatures in the range 25000 to 30000 K. The value of log g is of the order of 4.0 +- 0.5. Thus the photospheres of Wolf-Rayet stars correspond to those of moderately hot stars. The line spectra of Wolf-Rayet stars, however, indicate that electron temperatures greater than 30000 K occur in the outer atmospheres or mantles of these stars. Here outflow is important. (Auth.)

  17. Winter severity and wolf predation on a formerly wolf-free elk herd

    Science.gov (United States)

    Mech, L. David; Smith, Douglas W.; Murphy, Kerry M.; MacNulty, Daniel R.

    2001-01-01

    We studied wolf (Canis lupus) predation on elk (Cervus elaphus) in Yellowstone National Park from 17 March to 15 April 1997 (severe winter conditions) and from 2 to 31 March 1998 (mild winter conditions) 2-3 years after wolves were reintroduced to the park. Elk composed 91 % of 117 kills. Data comparisons for 1997 versus 1998 were: hunting success rate, 26% versus 15%; kill rate, 17.1 kg/wolf/day versus 6.1; percent of kill consumed in first day, 7 versus 86; percent femur marrow fat of adult kills, 27 versus 70; calf:adult ratios of kills, 2:33 versus 17:23; sex ratio of kills, 14M:19F versus 17M:6F; mean age of elk killed, males 6.1 years, females 15.2 versus males, 4.8, females 13.0. Winter severity influenced the wolf-elk relationship more than the naivete of the elk herd to predation by wolves.

  18. Subluminous Wolf-Rayet stars: Observations

    International Nuclear Information System (INIS)

    Heap, S.R.

    1982-01-01

    The author has used the fact that some central stars are WR stars and others are say, O stars, as a focal point for his presentation. In attempting to answer this question he has considered how the properties of WR-type central stars differ from those of O-type stars. The study begins with the classification and calibration of WR spectra, then goes on to the physical properties of WR-type central stars, and at the end returns to the question of what distinguishes a Wolf-Rayet star. The observational data for central stars are neither complete nor precise. Nevertheless, they suggest that what distinguishes a WR central star is not so much its present physical properties (e.g. temperature, gravity), but rather, its fundamental properties (initial and evolutionary history). (Auth.)

  19. The origin of Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Doom, C.

    1987-01-01

    The paper reviews the origin of Wolf-Rayet (WR) stars, with emphasis on the so-called Population I WR stars which are associated with the young and luminous stellar population. A description is given of the observational characteristics i.e. classification, luminosities composition, etc. of WR stars. The origin and evolution of WR stars is described, including the single, binary, subtypes and ratio WR/O. The interaction of the WR stars with their environment is discussed with respect to the energy deposition and composition anomalies. A brief account of the discovery of WR stars in other galaxies is given. Finally, some of the main issues in the research into the structure and evolution of WR stars are outlined. (U.K.)

  20. Supernovae from Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Schaeffer, R.

    1986-01-01

    Wolf-Rayet stars are known to originate from the most massive stars. Under the assumption that these stripped stars explode at the end of their evolution through the same instability mechanism as type II supernovae, we calculate their light curve. The latter is found to be quite similar to the typical SN I light curves but is fainter by about 2 magnitudes. A detailed study of its shape leads to identify the WR supernovae with the SNIp (or SNIb) subclass. The more massive WR stars should explode via the e + e - pair production mechanism, with negligible 56 Ni formation. Their rather dim light curve is predicted to have a ∼ 2 month plateau and afterwards a very sharp decline. A delayed manifestation of such an event might be the Cas A remnant

  1. Did American social and economic events from 1865 to 1898 influence D.D. Palmer the chiropractor and entrepreneur?

    Science.gov (United States)

    Batinić, Josip; Skowron, Mirek; Hammerich, Karin

    2013-09-01

    This paper explores how the social landscape of the latter half of the nineteenth century influenced D. D. Palmer and the many occupations he pursued. It focuses on the geographical area where D. D. lived from 1865 to 1898. This paper will show how the American social and economic events of the time provided favourable circumstances for D.D.'s entrepreneurial successes.

  2. Inversion tillage, high residue covers, and different herbicide regimes for palmer amaranth control in liberty link systems

    Science.gov (United States)

    Glyphosate-resistant Palmer amaranth is adversely affecting cotton production in the Southeast US. A field experiment was established in fall 2008 at the E.V. Smith Research Center, Field Crops Unit near Shorter, AL, to investigate the role of inversion tillage, high residue cover crops, and differ...

  3. Wolf Search Algorithm for Solving Optimal Reactive Power Dispatch Problem

    Directory of Open Access Journals (Sweden)

    Kanagasabai Lenin

    2015-03-01

    Full Text Available This paper presents a new bio-inspired heuristic optimization algorithm called the Wolf Search Algorithm (WSA for solving the multi-objective reactive power dispatch problem. Wolf Search algorithm is a new bio – inspired heuristic algorithm which based on wolf preying behaviour. The way wolves search for food and survive by avoiding their enemies has been imitated to formulate the algorithm for solving the reactive power dispatches. And the speciality  of wolf is  possessing  both individual local searching ability and autonomous flocking movement and this special property has been utilized to formulate the search algorithm .The proposed (WSA algorithm has been tested on standard IEEE 30 bus test system and simulation results shows clearly about the good performance of the proposed algorithm .

  4. Death of a wild wolf from canine parvovirus enteritis

    Science.gov (United States)

    Mech, L.D.; Kurtz, H.J.; Goyal, S.

    1997-01-01

    A 9-mo-old female wolf (Canis lupus) in the Superior National Forest of Minnesota (USA) died from a canine parvovirus (CPV) infection. This is the first direct evidence that this infection effects free-ranging wild wolves.

  5. Observations of southern Wolf-Rayet stars. I

    International Nuclear Information System (INIS)

    Niemela, V.S.

    1976-01-01

    The Wolf-Rayet star HD 90657 is found to be a spectroscopic binary with a WN5+O6 spectrum and a period of 6.456 days. Preliminary orbital elements show an elliptic orbit and a mass ratio Msub(WR)/Msub(O) approximately 0.5. Evidence is presented for the Wolf-Rayet atmosphere being accelerated outwards and not being spherically symmetric. (Auth.)

  6. Ecology and conservation of the maned wolf: introduction

    OpenAIRE

    Consorte-McCrea, A.; Santos, Eliana Ferraz

    2013-01-01

    Wolves are considered controversial figures worldwide: mythical creatures as well as troublemakers, their conservation can polarize extreme views and it often is riddled with conflicts. In recent years much effort has focussed on the discussion of how to conserve large carnivores, such as wolves, while addressing public concerns. The maned wolf, however, has mostly eluded the discussion stage. With its solitary habits and unusual fruit-eating diet, the endangered maned wolf roams the grasslan...

  7. Adaptive and self-averaging Thouless-Anderson-Palmer mean-field theory for probabilistic modeling

    DEFF Research Database (Denmark)

    Opper, Manfred; Winther, Ole

    2001-01-01

    We develop a generalization of the Thouless-Anderson-Palmer (TAP) mean-field approach of disorder physics. which makes the method applicable to the computation of approximate averages in probabilistic models for real data. In contrast to the conventional TAP approach, where the knowledge...... of the distribution of couplings between the random variables is required, our method adapts to the concrete set of couplings. We show the significance of the approach in two ways: Our approach reproduces replica symmetric results for a wide class of toy models (assuming a nonglassy phase) with given disorder...... distributions in the thermodynamic limit. On the other hand, simulations on a real data model demonstrate that the method achieves more accurate predictions as compared to conventional TAP approaches....

  8. Comparing the Palmer Drought Index and the Standardized Precipitation Index for Zagreb-Gric Observatory

    Science.gov (United States)

    Pandzic, Kreso

    2016-04-01

    Conventional Palmer Drought Index (PDSI) and recent Standardized Precipitation Index (SPI) are compared for Zagreb-Gric weather station. Historical time series of PDSI and SPI are compared. For that purpose monthly precipitation, air temperature and air humidity data for Zagreb-Gric Observatory and period 1862-2012 are used. The results indicate that SPI is simpler for interpretation than PDSI. On the other side, lack of temperature within SPI, make impossible use of it on climate change applications. A comparison of PDSI and SPI for the periods from 1 to 24 months indicate the best agreement between PDSI and SPI for the periods from 6 to 12 months. In addition, correlation coefficients of determination between annual corn crop per hectare and SPI 9- months time scale and PDSI from May to October are shown as significant.

  9. Lazer, modernidade, capitalismo: um olhar a partir da obra de Edward Palmer Thompson

    Directory of Open Access Journals (Sweden)

    Victor Andrade de Melo

    2010-06-01

    Full Text Available O processo de consolidação do modo de produção fabril paulatinamente configurou uma clara distinção entre a jornada de trabalho e um tempo livre. Que relação se pode estabelecer entre essa nova dinâmica dos tempos sociais e as tensões relacionadas à construção de um novo conjunto de comportamentos considerados adequados para a consolidação do capitalismo? Esse estudo tem por objetivo discutir o trato dessa questão na obra de Edward Palmer Thompson. Parece possível afirmar que, para ele, o controle do tempo do não-trabalho e das práticas de lazer foi compreendido como uma dimensão fundamental para garantir o "progresso".

  10. About the book by Riitta V. Lahtinen and Russ C. Palmer. The Body Story

    Directory of Open Access Journals (Sweden)

    Salomatina I.V.

    2012-12-01

    Full Text Available The study carried out by a married couple, specialists in the sphere of deafblindness (one of whom has got an Usher syndrome, is devoted to the development of means of non-verbal communication and music perception for people with double sensory defect — deafblindness. Russ Palmer is a professional musician who had lost his hearing capacity under the influence of Usher syndrome. At present together with his wife he is inventing new ways of widening the contacts with the external world for people who found themselves in the same difficult situation. The authors of the book prove that any welfare item like a pillow or a toy balloon can sometimes dramatically change the situation for better.

  11. Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2012 September - 2013 January

    Science.gov (United States)

    Warner, Brian D.

    2013-04-01

    Lightcurves for 40 asteroids were obtained at the Palmer Divide Observatory (PDO) from 2012 September to 2013 January: 495 Eulalia, 1694 Kaiser, 2001 Einstein, 3086 Kalbaugh, 3635 Kreutz, 5806 Archieroy, 6310 Jankonke, 6447 Terrycole, 6744 Komoda, 7086 Bopp, 7560 Spudis, 8325 Trigo-Rodriguez, 11149 Tateshina, 11709 Eudoxos, (13245) 1998 MM19, (13573) 1993 FZ18, 14395 Tommorgan, 15434 Mittal, (17657) 1996 VO4, (22013) 1999 XO89, (26916) 1996 RR2, 27776 Cortland, (30878) 1992 GQ, (30981) 1995 SJ4, (31831) 1999 YL, (32626) 2001 RX64, (51371) 2000 XF15, 55844 Bicak, (55854) 1996 VS1, (63440) 2001 MD30, (66832) 1999 UE45, (70927) 1999 VX210, (72675) 2001 FP54, (86388) 2000 AT60, (90988) 1997 XS13, (123937) 2001 EX16, (136017) 2002 VH74, (192683) 1999 SO27, (330825) 2008 XE3, and 2012 TC4. Based on data and analysis in 2012 for 27776 Cortland, the previously reported period from 2009 has been revised.

  12. The Courage to Teach: Exploring the Inner Landscape of a Teacher's Life (by Parker J. Palmer)

    Science.gov (United States)

    Hurt Middlecamp, Reviewed By Catherine

    1999-12-01

    Most of us would willingly - perhaps even passionately - tackle the question of what we should teach our students. Similarly, we are likely to engage in a conversation about how we teach and our preferences for organizing classroom time and structures. Although the question of why we teach may be raised less often (and perhaps with a hint of sarcasm), this too is a question to which most can offer a thoughtful response. An entirely different matter, however, is the question of who is the person teaching. This who involves the inner realms of one's heart, mind, and soul. How does our identity affect the teaching and learning processes? As we teach, what paths are we following intellectually, emotionally, or even spiritually? How do these paths influence our relationship to our content and to our students? With an engaging honesty, Parker Palmer pursues these questions in The Courage to Teach: Exploring the Inner Landscape of A Teacher's Life. At the outset he points out (p 4): I have no quarrel with the what or how or why questions - except when they are posed as the only questions worth asking. All of them can yield important insights into teaching and learning. But none of them opens up the territory I want to explore in this book: the inner landscape of the teaching self. One might well question why those of us teaching chemistry should be interested in examining ourselves as part of the teaching equation. Isn't scientific knowledge supposed to be as objective as we can make it? Isn't it better for us to check our emotional or intellectual baggage at the classroom door, rather than to taint the content with our biases? Or perhaps more directly stated, is it not more practical and a better use of our time to simply deal with the realities of the day-to-day classroom issues? Admittedly these are fair questions. However, to become stuck on them is to miss the opportunities for reflection and growth as teachers that Palmer's book offers. Simply put, people teach

  13. Is science in danger of sanctifying the wolf?

    Science.gov (United States)

    Mech, L. David

    2012-01-01

    Historically the wolf (Canis lupus) was hated and extirpated from most of the contiguous United States. The federal Endangered Species Act fostered wolf protection and reintroduction which improved the species' image. Wolf populations reached biological recovery in the Northern Rocky Mountains and upper Midwest, and the animal has been delisted from the Endangered Species List in those areas. Numerous studies in National Parks suggest that wolves, through trophic cascades, have caused ecosystems to change in ways many people consider positive. Several studies have been conducted in Yellowstone National Park where wolf interactions with their prey, primarily elk (Cervus elaphus), are thought to have caused reduction of numbers or changes in movements and behavior. Some workers consider the latter changes to have led to a behaviorally-mediated trophic cascade. Either the elk reduction or the behavioral changes are hypothesized to have fostered growth in browse, primarily willows (Salix spp.) and aspen (Populus spp.), and that growth has resulted in increased beavers (Castor Canadensis), songbirds, and hydrologic changes. The wolf's image thus has gained an iconic cachet. However, later research challenges several earlier studies' findings such that earlier conclusions are now controversial; especially those related to causes of browse regrowth. In any case, any such cascading effects of wolves found in National Parks would have little relevance to most of the wolf range because of overriding anthropogenic influences there on wolves, prey, vegetation, and other parts of the food web. The wolf is neither a saint nor a sinner except to those who want to make it so.

  14. Wolf-Rayet stars and galactic structure

    International Nuclear Information System (INIS)

    Stenholm, B.

    1975-01-01

    A 15 0 wide strip along the galactic equator between longitudes 250 0 and 360 0 has been searched for Wolf-Rayet stars. Six new WR stars and four new planetary nebulae have been found. Seven stars earlier listed as WR stars have been rejected as such. The new WR stars in the 'Luminous Stars in the Southern Milky Way' are discussed. A sample of 154 WR stars has been treated statistically. For the distribution in longitude, comparisons are made with OB stars and classical cepheids. The differences in distribution are thought to be an age effect. An effort to explain the empty interval towards the anticentre is made. The distribution in latitude is compared with young clusters and long-period cepheids. The physical plane formed by these objects is tilted about one degree to the galactic plane and the tilt is upwards in the Cygnus direction. This result is also received by a least squares solution of the objects when given in rectangular coordinates. The WR star sample is regarded as fairly complete up to a distance of 5 kpc. (orig.) [de

  15. Population genomics of the inbred Scandinavian wolf.

    Science.gov (United States)

    Hagenblad, Jenny; Olsson, Maria; Parker, Heidi G; Ostrander, Elaine A; Ellegren, Hans

    2009-04-01

    The Scandinavian wolf population represents one of the genetically most well-characterized examples of a severely bottlenecked natural population (with only two founders), and of how the addition of new genetic material (one immigrant) can at least temporarily provide a 'genetic rescue'. However, inbreeding depression has been observed in this population and in the absence of additional immigrants, its long-term viability is questioned. To study the effects of inbreeding and selection on genomic diversity, we performed a genomic scan with approximately 250 microsatellite markers distributed across all autosomes and the X chromosome. We found linkage disequilibrium (LD) that extended up to distances of 50 Mb, exceeding that of most outbreeding species studied thus far. LD was particularly pronounced on the X chromosome. Overall levels of observed genomic heterozygosity did not deviate significantly from simulations based on known population history, giving no support for a general selection for heterozygotes. However, we found evidence supporting balancing selection at a number of loci and also evidence suggesting directional selection at other loci. For markers on chromosome 23, the signal of selection was particularly strong, indicating that purifying selection against deleterious alleles may have occurred even in this very small population. These data suggest that population genomics allows the exploration of the effects of neutral and non-neutral evolution on a finer scale than what has previously been possible.

  16. Simulation of the Quantity, Variability, and Timing of Streamflow in the Dennys River Basin, Maine, by Use of a Precipitation-Runoff Watershed Model

    Science.gov (United States)

    Dudley, Robert W.

    2008-01-01

    The U.S. Geological Survey (USGS), in cooperation with the Maine Department of Marine Resources Bureau of Sea Run Fisheries and Habitat, began a study in 2004 to characterize the quantity, variability, and timing of streamflow in the Dennys River. The study included a synoptic summary of historical streamflow data at a long-term streamflow gage, collecting data from an additional four short-term streamflow gages, and the development and evaluation of a distributed-parameter watershed model for the Dennys River Basin. The watershed model used in this investigation was the USGS Precipitation-Runoff Modeling System (PRMS). The Geographic Information System (GIS) Weasel was used to delineate the Dennys River Basin and subbasins and derive parameters for their physical geographic features. Calibration of the models used in this investigation involved a four-step procedure in which model output was evaluated against four calibration data sets using computed objective functions for solar radiation, potential evapotranspiration, annual and seasonal water budgets, and daily streamflows. The calibration procedure involved thousands of model runs and was carried out using the USGS software application Luca (Let us calibrate). Luca uses the Shuffled Complex Evolution (SCE) global search algorithm to calibrate the model parameters. The SCE method reliably produces satisfactory solutions for large, complex optimization problems. The primary calibration effort went into the Dennys main stem watershed model. Calibrated parameter values obtained for the Dennys main stem model were transferred to the Cathance Stream model, and a similar four-step SCE calibration procedure was performed; this effort was undertaken to determine the potential to transfer modeling information to a nearby basin in the same region. The calibrated Dennys main stem watershed model performed with Nash-Sutcliffe efficiency (NSE) statistic values for the calibration period and evaluation period of 0.79 and 0

  17. Turbidity, SOLAR RADIATION - ATMOSPHERIC and other data from NATHANIEL B. PALMER from 1996-10-08 to 1996-11-05 (NODC Accession 9900066)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature, salinity, and nutrients data were collected from CTD and bottle casts in the Pacific Ocean from the Nathaniel B. Palmer from 08 October 1996 to 05...

  18. Turbidity, SOLAR RADIATION - ATMOSPHERIC and other data from NATHANIEL B. PALMER from 1994-11-09 to 1994-12-08 (NODC Accession 9700174)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature, salinity, and other data were collected from bottle and CTD casts from the Nathaniel B. Palmer from 09 November 1994 to 08 December 1994. Data were...

  19. Underway pCO2 Measurements in Surface Waters and the Atmosphere During the R/V Nathaniel B. Palmer 2016 Expeditions (NCEI Accession 0166630)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0166630 includes Surface underway data collected from R/V Nathaniel B. Palmer in the South Pacific Ocean, South Atlantic Ocean, Southern Oceans from...

  20. Evaluación de la técnica modificada de Dennis para el diagnóstico de fasciolosis bovina

    Directory of Open Access Journals (Sweden)

    Stefanya Correa

    2016-04-01

    Conclusión. La validez y el desempeño de la técnica modificada de Dennis fueron superiores a los de la técnica tradicional, por lo que constituye una buena heramienta de tamización para el diagnóstico de la fasciolosis en estudios poblacionales y de prevalencia, así como en jornadas de salud animal.

  1. Predicting red wolf release success in the southeastern United States

    Science.gov (United States)

    van Manen, Frank T.; Crawford, Barron A.; Clark, Joseph D.

    2000-01-01

    Although the red wolf (Canis rufus) was once found throughout the southeastern United States, indiscriminate killing and habitat destruction reduced its range to a small section of coastal Texas and Louisiana. Wolves trapped from 1973 to 1980 were taken to establish a captive breeding program that was used to repatriate 2 mainland and 3 island red wolf populations. We collected data from 320 red wolf releases in these areas and classified each as a success or failure based on survival and reproductive criteria, and whether recaptures were necessary to resolve conflicts with humans. We evaluated the relations between release success and conditions at the release sites, characteristics of released wolves, and release procedures. Although <44% of the variation in release success was explained, model performance based on jackknife tests indicated a 72-80% correct prediction rate for the 4 operational models we developed. The models indicated that success was associated with human influences on the landscape and the level of wolf habituation to humans prior to release. We applied the models to 31 prospective areas for wolf repatriation and calculated an index of release success for each area. Decision-makers can use these models to objectively rank prospective release areas and compare strengths and weaknesses of each.

  2. Peculiarities in the distribution of galactic Wolf-Rayet stars: constraints on evolutionary scenarios

    International Nuclear Information System (INIS)

    Gomez, A.; Lortet, M.-C.; Pitault, A.

    1981-01-01

    The re-examination of the spatial distribution of 158 Wolf-Rayet stars in the Galaxy may help to define different breeds of Wolf-Rayet stars and put constraints on possible evolutionary scenarios. (Auth.)

  3. Interpretation of ground and aeromagnetic surveys of Palmer Land, Antarctic Peninsula

    Directory of Open Access Journals (Sweden)

    V. N. Masolov

    2000-06-01

    Full Text Available Aeromagnetic data for Palmer Land provide new information on crustal structures of the Antarctic Peninsula. Features shown on the compilation of the Lassiter Coast and Orville Coast are characterized by systems of subparallel regional anomaly zones and lineaments. The magnetic data reveal the widespread presence of an orthogonal pattern of crosscutting linear discontinuities that can be interpreted as a Late Cretaceous/Early Tertiary fracture pattern. The main displacements in the anomaly pattern between the two units are recognized in Wetmore-Irvine glaciers area where the structure of the Antarctic Peninsula changes orientation from SW-NE to S-N. The NW-SE trending transitional zone is probably a transfer zone associated with north-westerly movement of the Lassiter Coast crustal segment relative to the Orville Coast segment. Within the Lassiter Coast a fragment of Pacific Margin Anomaly (PMA, Central Plateau Magnetic Anomaly and East Coast Magnetic Anomaly (ECMA are mapped. Two-dimensional modelling suggests that PMA is caused by a limited depth body (8 km consisting of numerous plutons, probably, of different ages, composition and magnetization. The Central Plateau Magnetic Anomaly and the Merrick-Sweeney-Latady zone of the Orville Coast are represented by strong positive anomaly bands that are associated with gabbro-diorite rocks and accompanying plutons intruded near by the border of Mount Poster Formation and Latady Formation. The ECMA are alignments of high-amplitude magnetic anomalies caused by gabbro-diorite bodies, which are located within the framework of the Cretaceous granite-granodiorite plutons. Granite-granodiorite plutons of Lassiter Coast Intrusive Suite are mostly reflected by positive anomalies (100-500 nT. Modelling studies and the character of distribution of the magnetic anomalies suggest that the plutons of Lassiter Coast Intrusive Suite are prominently reflected in magnetic anomalies of regional extent. The plutonic

  4. Did American social and economic events from 1865 to 1898 influence D.D. Palmer the chiropractor and entrepreneur?

    Science.gov (United States)

    Batinić, Josip; Skowron, Mirek; Hammerich, Karin

    2013-01-01

    This paper explores how the social landscape of the latter half of the nineteenth century influenced D. D. Palmer and the many occupations he pursued. It focuses on the geographical area where D. D. lived from 1865 to 1898. This paper will show how the American social and economic events of the time provided favourable circumstances for D.D.’s entrepreneurial successes. PMID:23997248

  5. The sixth catalogue of galactic Wolf-Rayet stars, their past and present

    International Nuclear Information System (INIS)

    Hucht, K.A. van der; Conti, P.S.; Lundstroem, I.; Stenholm, B.

    1981-01-01

    This paper presents the Sixth Catalogue of galactic Wolf-Rayet stars (Pop I), a short history on the five earlier WR catalogues, improved spectral classification, finding charts, a discussion on related objects, and a review of the current statur of Wolf-Rayet star research. The appendix presents a bibliography on most of the Wolf-Rayet literature published since 1867. (orig.)

  6. Gamma-ray bursts from tidally spun-up Wolf-Rayet stars?

    NARCIS (Netherlands)

    Detmers, R.G.; Langer, N.; Podsiadlowski, Ph.; Izzard, R.G.

    2008-01-01

    Context. The collapsar model requires rapidly rotating Wolf-Rayet stars as progenitors of long gamma-ray bursts. However, Galactic Wolf-Rayet stars rapidly lose angular momentum due to their intense stellar winds. Aims. We investigate whether the tidal interaction of a Wolf-Rayet star with a compact

  7. Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2017 July Through October

    Science.gov (United States)

    Warner, Brian D.

    2018-01-01

    Lightcurves for 37 near-Earth asteroids (NEAs) obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2017 July through October were analyzed for rotation period and signs of satellites or tumbling. (6053) 1993 BW3 was found to have an ambiguous solution that was resolved to 2.5737 h by using split-halves plots (see Harris et al., 2014). Data from 2016 for (141354) 2002 AJ29 were re-examined in light of new, independent results (Vaduvescu et al., 2017; 10.754 h). The 2016 data now lead to a revised period of 10.801 h. Recent results for (12538) 1998 OH by Vaduvescu et al. (2017, 2.58 h) prompted a reexamination of CS3 data from 2014 and 2016 with the result that the more recent period of 5.151 h (Warner, 2017a) is still more likely correct. Analysis of (66146) 1998 TU3 indicates it is a possible binary asteroid with P1 = 2.37760 h and PORB = 13.58 h. 2012 TC4 and 2017 NH were both found to be tumbling asteroids with short periods and large amplitudes.

  8. ELF Transients and Q-bursts Detected Around the Globe: First results from Palmer Station, Antarctica

    Science.gov (United States)

    Flint, Q. A.; Moore, R. C.

    2016-12-01

    We present the first analysis of data from the recently deployed broadband ELF (5-500 Hz) B-field receiver at Palmer Station, Antarctica together with observations at similar receivers located at Sondrestromfjord, Greenland and Arrival Heights, Antarctica. Such remote locations afford the unique opportunity to record signals that are essentially unperturbed by power line noise. As a result, using this multi-site global network of ELF/VLF receivers, we are able to easily detect a particular type of ELF transient that propagates around the world multiple times, known as the Q-burst. The Q-burst is characterized by a large increase in amplitude above the background at the Schumann Resonance modes and is believed to result from especially powerful cloud-to-ground lightning discharges. These powerful lightning discharges are likely responsible for a significant level of energetic coupling between the troposphere, the ionosphere, and the magnetosphere. The ELF and VLF waves excited by the lightning discharge propagate to great distances in the earth-ionosphere waveguide, and in fact propagate around the Earth multiple times. By measuring the received waveform at multiple distant sites around the globe, we can pinpoint the source lightning location, compare the changes in field strength and spectrum as a function of distance from the source, and evaluate modal propagation effects in the VLF range (that are not apparent in the ELF range).

  9. Effects of Lead on Ultrastructure of Isoetes sinensis Palmer (Isoetaceae, a Critically Endangered Species in China.

    Directory of Open Access Journals (Sweden)

    Guohua Ding

    Full Text Available Isoetes sinensis Palmer (Isoetaceae is a critically endangered fern that is a marsh plant (that is an aquatic or amphibious plant in China. To evaluate damage or influence of lead (Pb on cell ultrastructure in I. sinensis, we used 2000mg·L-1 Pb(NO32 solution to treat I. sinensis for 35d, and used transmission electron microscope (TEM to observe the cell ultrastructure of leaf blades and roots of the plant. Our results indicated that Pb induced distinct changes of the organelles including chloroplast, mitochondria, nucleolus and vacuole. The level of damage organ was lower leaf > upper leaf > root The typical performance of the damages caused by lead shown that part of the nucleolus cracked; the cristae dilated, matrix vacuolized and membrane structure blurred in mitochondria; the vacuole cracked; grana lamella decreased, stroma lamella loosed, starch grains decreased, and membrane structure was disrupted in chloroplasts; Pb deposits were present on cell wall. The damages to chloroplasts and mitochondria were relatively severe, while damage to the nucleus was relatively lighter. The damage to the cell ultrastructure of leaf blades with direct contact with Pb was more severe than that without direct contact with Pb.

  10. Inheritance of Evolved Glyphosate Resistance in a North Carolina Palmer Amaranth (Amaranthus palmeri Biotype

    Directory of Open Access Journals (Sweden)

    Aman Chandi

    2012-01-01

    Full Text Available Inheritance of glyphosate resistance in a Palmer amaranth biotype from North Carolina was studied. Glyphosate rates for 50% survival of glyphosate-resistant (GR and glyphosate-susceptible (GS biotypes were 1288 and 58 g ha−1, respectively. These values for F1 progenies obtained from reciprocal crosses (GR×GS and GS×GR were 794 and 501 g ha−1, respectively. Dose response of F1 progenies indicated that resistance was not fully dominant over susceptibility. Lack of significant differences between dose responses for reciprocal F1 families suggested that genetic control of glyphosate resistance was governed by nuclear genome. Analysis of F1 backcross (BC1F1 families showed that 10 and 8 BC1F1 families out of 15 fitted monogenic inheritance at 2000 and 3000 g ha−1 glyphosate, respectively. These results indicate that inheritance of glyphosate resistance in this biotype is incompletely dominant, nuclear inherited, and might not be consistent with a single gene mechanism of inheritance. Relative 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS copy number varied from 22 to 63 across 10 individuals from resistant biotype. This suggested that variable EPSPS copy number in the parents might be influential in determining if inheritance of glyphosate resistance is monogenic or polygenic in this biotype.

  11. Classification of ulnar triangular fibrocartilage complex tears. A treatment algorithm for Palmer type IB tears.

    Science.gov (United States)

    Atzei, A; Luchetti, R; Garagnani, L

    2017-05-01

    The classical definition of 'Palmer Type IB' triangular fibrocartilage complex tear, includes a spectrum of clinical conditions. This review highlights the clinical and arthroscopic criteria that enable us to categorize five classes on a treatment-oriented classification system of triangular fibrocartilage complex peripheral tears. Class 1 lesions represent isolated tears of the distal triangular fibrocartilage complex without distal radio-ulnar joint instability and are amenable to arthroscopic suture. Class 2 tears include rupture of both the distal triangular fibrocartilage complex and proximal attachments of the triangular fibrocartilage complex to the fovea. Class 3 tears constitute isolated ruptures of the proximal attachment of the triangular fibrocartilage complex to the fovea; they are not visible at radio-carpal arthroscopy. Both Class 2 and Class 3 tears are diagnosed with a positive hook test and are typically associated with distal radio-ulnar joint instability. If required, treatment is through reattachment of the distal radio-ulnar ligament insertions to the fovea. Class 4 lesions are irreparable tears due to the size of the defect or to poor tissue quality and, if required, treatment is through distal radio-ulnar ligament reconstruction with tendon graft. Class 5 tears are associated with distal radio-ulnar joint arthritis and can only be treated with salvage procedures. This subdivision of type IB triangular fibrocartilage complex tear provides more insights in the pathomechanics and treatment strategies. II.

  12. The Usefulness of Dynamic Cine-Arthrography for Wrist Instability as Correlated with Arthroscopic Palmer Classification

    Energy Technology Data Exchange (ETDEWEB)

    Kim TaeYeon; Lee, Guen Young; Kim, Baek Hyun; Park, Jong Woong; Seo, Bo Kyoung; Cha, Sang Hoon [Korea University Ansan Hospital, Korea University College of Medicine, Ansan (Korea, Republic of)

    2011-05-15

    To introduce dynamic cine-arthrography and compare it with MR arthrography in the diagnosis of intrinsic ligament and triangular fibrocartilage complex tears, based on arthroscopic findings. A total of thirty-eight wrists of 38 patients who had undergone both dynamic cine-arthrography and MR arthrography were enrolled. Dynamic cinearthrography was performed after puncture of the radiocarpal joint by slow injection of contrast under continuous fluoroscopic guidance during passive wrist exercise. We obtained 1.5- or 3-T MR arthrography with fat-suppressed T1-weighted coronal and axial images. We evaluated scapholunate and lunotriquetral ligaments and triangular fibrocartilage complex tears according to the Palmer classification system. Based on the arthroscopic findings, we compared the diagnostic values between the two examinations using Kappa values. The overall sensitivity and specificity of diagnosis of intrinsic ligament tears was similar between dynamic cine-arthrography and MR arthrography (scapholunate ligament: sensitivity 66.7% vs. 80%, specificity 100% vs. 95.7%, lunotriquetral ligament: sensitivity 75.0% vs. 75.0%, specificity 94.1% vs. 91.2%). For triangular fibrocartilage complex tears, all diagnostic values were the same (sensitivity 96.4%, specificity 100%). The inter-examination agreement was substantial to perfect (kappa value 1.000). Dynamic cine-arthrography is valuable in the diagnosis of intrinsic ligament and triangular fibrocartilage complex tears compared to MR arthrography.

  13. Joint spatiotemporal variability of global sea surface temperatures and global Palmer drought severity index values

    Science.gov (United States)

    Apipattanavis, S.; McCabe, G.J.; Rajagopalan, B.; Gangopadhyay, S.

    2009-01-01

    Dominant modes of individual and joint variability in global sea surface temperatures (SST) and global Palmer drought severity index (PDSI) values for the twentieth century are identified through a multivariate frequency domain singular value decomposition. This analysis indicates that a secular trend and variability related to the El Niño–Southern Oscillation (ENSO) are the dominant modes of variance shared among the global datasets. For the SST data the secular trend corresponds to a positive trend in Indian Ocean and South Atlantic SSTs, and a negative trend in North Pacific and North Atlantic SSTs. The ENSO reconstruction shows a strong signal in the tropical Pacific, North Pacific, and Indian Ocean regions. For the PDSI data, the secular trend reconstruction shows high amplitudes over central Africa including the Sahel, whereas the regions with strong ENSO amplitudes in PDSI are the southwestern and northwestern United States, South Africa, northeastern Brazil, central Africa, the Indian subcontinent, and Australia. An additional significant frequency, multidecadal variability, is identified for the Northern Hemisphere. This multidecadal frequency appears to be related to the Atlantic multidecadal oscillation (AMO). The multidecadal frequency is statistically significant in the Northern Hemisphere SST data, but is statistically nonsignificant in the PDSI data.

  14. EDITORIAL: Richard Palmer: celebrating 37 years with Journal of Physics: Condensed Matter Richard Palmer: celebrating 37 years with Journal of Physics: Condensed Matter

    Science.gov (United States)

    Ferry, David

    2009-01-01

    It is with a great deal of both happiness and sadness that I have to announce that we are losing one of the real strengths of the Journal of Physics: Condensed Matter (JPCM). Dr Richard Palmer, our Senior Publisher, announced his retirement, and this issue marks the first without his involvement. Of course, we are happy that he will get to enjoy his retirement, but we are sad to lose such a valuable member of our team. Richard first started work at IOP Publishing in March 1971 as an Editorial Assistant with Journal of Physics B: Atomic and Molecular Physics. After a few months, he transferred to Journal of Physics C: Solid State Physics. During his first year, he was sent on a residential publishing training course and asked to sign an undertaking to stay at IOP Publishing for at least two years. Although Richard refused to sign, as he did not want to commit himself, he has remained with the journal since then. The following year, the Assistant Editor of Journal of Physics C: Solid State Physics, Malcolm Haines, walked out without notice in order to work on his family vineyard in France, and Richard stepped into the breach. In those days, external editors had a much more hands-on role in IOP Publishing and he had to travel to Harwell to be interviewed by Alan Lidiard, the Honorary Editor of Journal of Physics C: Solid State Physics, before being given the job of Assistant Editor permanently. I am told that in those days the job consisted mainly of editing and proofreading and peer review. There was no journal development work. At some point in the early 1980s, production and peer review were split into separate departments and Richard then headed a group of journals consisting of Journal of Physics C: Solid State Physics, Journal of Physics D: Applied Physics and Journal of Physics F: Metal Physics, Semiconductor Science and Technology, Superconductor Science and Technology, Plasma Physics and Controlled Fusion, and later Nanotechnology and Modelling and Simulation

  15. Gamma-Ray Bursts from tidally spun-up Wolf-Rayet stars?

    OpenAIRE

    Detmers, R. G.; Langer, N.; Podsiadlowski, Ph.; Izzard, R. G.

    2008-01-01

    Context. The collapsar model requires rapidly rotating Wolf-Rayet stars as progenitors of long gamma-ray bursts. However, Galactic Wolf-Rayet stars rapidly lose angular momentum due to their intense stellar winds. Aims. We investigate whether the tidal interaction of a Wolf-Rayet star with a compact object in a binary system can spin up the Wolf-Rayet star enough to produce a collapsar. Methods. We compute the evolution of close Wolf-Rayet binaries, including tidal angular momentum exchange, ...

  16. Fort Peck-Wolf Point transmission line project, Montana

    International Nuclear Information System (INIS)

    1992-01-01

    The primary objective of the project is to replace the existing 36-mile Fort Peck-Wolf Point transmission line which has reached the end of its useful service life. Presently, the overall condition of this existing section of the 47-year-old line is poor. Frequent repairs have been required because of the absence of overhead ground wires. The continued maintenance of the line will become more expensive and customer interruptions will persist because of the damage due to lightning. The expense of replacing shell rotted poles, and the concern for the safety of the maintenance personnel because of hazards caused by severe shell rot are also of primary importance. The operational and maintenance problems coupled with power system simulation studies, demonstrate the need for improvements to the Wolf Point area to serve area loads. Western's Wolf Point Substation is an important point of interconnection for the power output from the Fort Peck Dam to area loads as far away as Williston, North Dakota. The proposed transmission line replacement would assure that there will continue to be reliable transmission capacity available to serve area electrical loads, as well as provide a reliable second high-voltage transmission path from the Fort Peck generation to back-up a loss of the Fort Peck-Wolf Point 115-kV Line No. 1

  17. Near infrared spectra of Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Bappu, M.K.V.; Ganesh, K.S.; Scaria, K.K.

    1977-01-01

    The near-infrared spectra of three Wolf-Rayet stars of the carbon sequence and five of the nitrogen sequence have been studied. Wavelength identifications and intensity scans are presented to show the emission line characteristics of these objects in the 6800 A to 8200 A domain of the spectrum. (author)

  18. The Baldwin-effect in Wolf-Rayet stars

    NARCIS (Netherlands)

    Gent, Jeroen Ivar van

    2000-01-01

    This thesis investigates the Baldwin-effect in Wolf-Rayet (WR) stars. The Baldwin-effect is a correlation with negative slope between the equivalent width of spectral emission lines and the monochromatic luminosity of the underlying continuum at the line wavelength. This effect has been known to

  19. Unusual motions in the Wolf-Rayet nebula NGC 6888

    International Nuclear Information System (INIS)

    Johnson, P.G.; Songsathaporn, R.

    1981-01-01

    A systematic survey of the velocity structure within the Wolf-Rayet ring nebula NGC 6888 has been undertaken by making observations of the [N II] line profiles. They reveal a hitherto undetected and particularly unusual velocity structure with three of the brightest portions of the circumference of this ring exhibiting triple line components. Possible models to explain these observations are discussed. (author)

  20. Wolf-Rayet stars featured in emission-line galaxies

    International Nuclear Information System (INIS)

    Kunth, D.

    1982-01-01

    In the galaxy Tololo 3 (NGC 3125) recent observations by the author and Sargent (1981) have revealed the presence of an unusual strong and broad He II 4686 emission. The origin of this line together with some nitrogen lines (e.g. N V 4620 and N III 4638) is attributed to Wolf-Rayet stars, mostly of WN types. (Auth.)

  1. Key Issues and Research Agendas in Lone Wolf Terrorism

    NARCIS (Netherlands)

    Spaaij, R.; Hamm, M.S.

    2015-01-01

    This article builds on recent contributions to the academic literature on lone wolf terrorism to critically examine key issues that are germane to the current state of play in this field of study. It finds that, overall, the recent academic literature still suffers from considerable problems

  2. Planck 2015 results: XXI. The integrated Sachs-Wolfe effect

    DEFF Research Database (Denmark)

    Ade, P. A R; Aghanim, N.; Arnaud, M.

    2016-01-01

    This paper presents a study of the integrated Sachs-Wolfe (ISW) effect from the Planck 2015 temperature and polarization data release. This secondary cosmic microwave background (CMB) anisotropy caused by the large-scale time-evolving gravitational potential is probed from different perspectives....

  3. Studies of wolf x coyote hybridization via artificial insemination

    Science.gov (United States)

    Mech, L. David; Asa, Cheryl S.; Callahan, Margaret; Christensen, Bruce W.; Smith, Fran; Young, Julie K.

    2017-01-01

    Following the production of western gray wolf (Canis lupus) x western coyote (Canis latrans) hybrids via artificial insemination (AI), the present article documents that the hybrids survived in captivity for at least 4 years and successfully bred with each other. It further reports that backcrossing one of the hybrids to a male gray wolf by AI also resulted in the birth of live pups that have survived for at least 10 months. All male hybrids (F1 and F2) produced sperm by about 10 months of age, and sperm quality of the F1 males fell within the fertile range for domestic dogs, but sperm motility and morphology, in particular, were low in F2 males at 10 months but improved in samples taken at 22 months of age. These studies are relevant to a long-standing controversy about the identity of the red wolf (Canis rufus), the existence of a proposed new species (Canis lycaon) of gray wolf, and to the role of hybridization in mammalian evolution.

  4. Assessing Agricultural Drought in the Anthropocene: A Modified Palmer Drought Severity Index

    Directory of Open Access Journals (Sweden)

    Mingzhi Yang

    2017-09-01

    Full Text Available In the current human-influenced era, drought is initiated by natural and human drivers, and human activities are as integral to drought as meteorological factors. In large irrigated agricultural regions with high levels of human intervention, where the natural farmland soil moisture has usually been changed significantly by high-frequency irrigation, the actual severity of agricultural drought is distorted in traditional drought indices. In this work, an agricultural drought index that considering irrigation processes based on the Palmer drought severity index (IrrPDSI was developed to interpret the real agricultural drought conditions in irrigated regions, with a case study in the Haihe River Basin in northeast China. The water balance model in the original PDSI was revised by an auto-irrigation threshold method combined with a local irrigation schedule. The auto-irrigation setting of the index was used by taking irrigation quotas during specific growth stages of specific crops (wheat–corn into consideration. A series of weekly comparative analyses are as follows: (1 The soil moisture analyses showed that soil moisture values calculated by the modified water balance model were close to the real values; (2 The statistical analyses indicated that most of the stations in the study area based on IrrPDSI had nearly normal distributed values; (3 The time series and spatial analyses showed that the results of the IrrPDSI-reported dry-wet evaluation were more consistent with documented real conditions. All the results revealed that IrrPDSI performed well when used to assess agricultural drought. This work has direct significance for agricultural drought management in large irrigated areas heavily disturbed by human activity.

  5. Phase Competition in the Palmer-Chalker X Y Pyrochlore Er2Pt2O7

    Science.gov (United States)

    Hallas, A. M.; Gaudet, J.; Butch, N. P.; Xu, Guangyong; Tachibana, M.; Wiebe, C. R.; Luke, G. M.; Gaulin, B. D.

    2017-11-01

    We report neutron scattering measurements on Er2Pt2O7 , a new addition to the X Y family of frustrated pyrochlore magnets. Symmetry analysis of our elastic scattering data shows that Er2Pt2O7 orders into the k =0 , Γ7 magnetic structure (the Palmer-Chalker state), at TN=0.38 K . This contrasts with its sister X Y pyrochlore antiferromagnets Er2Ti2O7 and Er2Ge2O7 , both of which order into Γ5 magnetic structures at much higher temperatures, TN=1.2 and 1.4 K, respectively. In this temperature range, the magnetic heat capacity of Er2Pt2O7 contains a broad anomaly centered at T*=1.5 K . Our inelastic neutron scattering measurements reveal that this broad heat capacity anomaly sets the temperature scale for strong short-range spin fluctuations. Below TN=0.38 K , Er2Pt2O7 displays a gapped spin-wave spectrum with an intense, flat band of excitations at lower energy and a weak, diffusive band of excitations at higher energy. The flat band is well described by classical spin-wave calculations, but these calculations also predict sharp dispersive branches at higher energy, a striking discrepancy with the experimental data. This, in concert with the strong suppression of TN, is attributable to enhanced quantum fluctuations due to phase competition between the Γ7 and Γ5 states that border each other within a classically predicted phase diagram.

  6. Intensive photometry of southern Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Balona, L.A.; Egan, J.; Marang, F.

    1989-01-01

    Results are presented of an intensive photometric campaign on 17 of the brightest southern Wolf-Rayet stars. We report the detection of multi-periodicity in two stars: HD 50896 and HD 96548. It is likely that these periodicities are not coherent but are manifestations of the quasi-periodic variations seen in a few WR stars. A good example of these variations is given by HD 86161. A new eclipsing binary, HD 92740 has been discovered; other stars show periodic variations which can be explained by phase-dependent scattering of the secondary light as it traverses the Wolf-Rayet wind. An important conclusion of this study is that not a single example was found of short-period variations which can be attributed to pulsation. (author)

  7. Extraosseous osteosarcoma in a maned wolf (Chrysocyon brachyurus).

    Science.gov (United States)

    Reid, Heather L; Deem, Sharon L; Citino, Scott B

    2005-09-01

    A 6-yr-old maned wolf (Chrysocyon brachyurus) was diagnosed with an extraosseous osteosarcoma on the lateral aspect of the right thigh. Antemortem radiography revealed a calcified mass with no skeletal involvement. The mass was excised, but visible regrowth of the tumor was evident within 5 wk. Histologic examination and immunohistochemistry, including staining for p53 tumor suppression gene protein, were performed on the excised mass. The maned wolf was euthanized 13 wk after the initial diagnosis. The neoplasm was located in a site commonly used for the delivery of intramuscular injections, including vaccinations. Although no definitive association can be made, it is worth noting this relationship, as vaccine-site neoplasias have been observed in other species, most notably the domestic cat (Felis domesticus).

  8. MASTICATORY MUSCLE MYOSITIS IN A GRAY WOLF (CANIS LUPUS).

    Science.gov (United States)

    Kent, Marc; Glass, Eric N; Castro, Fernando A; Miller, Andrew D; de Lahunta, Alexander

    2017-03-01

    A 10-yr-old male, neutered gray wolf ( Canis lupus ) was presented for atrophy of the temporalis and masseter muscles. Clinical signs and magnetic resonance imaging were consistent with a myopathy. Positive serology for antibody titers directed against Type 2M myofibers, and the observation of a mixed mononuclear inflammatory cell infiltrate along with eosinophils and neutrophils within the temporalis muscle, were diagnostic for masticatory muscle myositis. Importantly, protozoal myositis was excluded based on other clinicopathologic data. The case highlights the potential for immune-mediated polymyositis in canids other than the domesticated dog ( Canis lupus familaris). Additionally, awareness of a diet in which raw meat is used should prompt a thorough investigation for an underlying infectious myositis in the gray wolf.

  9. Preventing Lone Wolf Terrorism: some CT Approaches Addressed

    Directory of Open Access Journals (Sweden)

    Edwin Bakker

    2011-12-01

    Full Text Available After a brief discussion of the epistemological and phenomenological difficulties associated with the concept of lone wolf terrorism, a number of possible counter-terrorist approaches are discussed. Lone operator terrorist acts should be considered ‘black swan’ occurrences that are almost impossible to categorize or systematize, let alone forecast. Thus, not the profile of the perpetrator, but the modus operandi offer clues for a better response to this particular threat. Furthermore, almost all lone operators do display a degree of commitment to, and identification with, extremist movements – providing leads for preventing new rounds of radicalization within this potential group of sympathizers or followers. With the apparent increase of Islamist lone wolf terrorism and fears for right-wing extremists wanting to follow the example of the Norwegian mass murderer A.B. Breivik, new questions need to be posed, addressing the role of virtual communities with which lone operators identify themselves. 

  10. Severe maxillary osteomyelitis in a Gray Wolf (Canis lupus)

    Science.gov (United States)

    Barber-Meyer, Shannon

    2012-01-01

    Dental injuries to or abnormalities in functionally important teeth and associated bones in predators may significantly reduce the ability to kill and consume prey (Lazar et al. 2009). This impairment is likely exacerbated in coursing predators, such as Gray Wolves, that bite and hold onto fleeing and kicking prey with their teeth. Damage to carnassials (upper fourth premolar, P4, and lower first molar, M1) and associated bones in Gray Wolves may especially inhibit the consumption of prey because these teeth slice meat and crush bone. Here I report maxillary osteomyelitis involving the carnassials in a wild Gray Wolf from northeastern Minnesota of such severity that I hypothesize it ultimately caused the Gray Wolf to starve to death.

  11. Combined Palmer Type 1A and 1B Traumatic Lesions of the Triangular Fibrocartilage Complex A New Category.

    Science.gov (United States)

    Nance, Erin; Ayalon, Omri; Yang, Steven

    2016-06-01

    We present a series of eight patients who underwent wrist arthroscopy for presumed solitary tears of the triangular fibrocartilage (TFC) and were, instead, found to have combined 1A (central tear) and 1B (ulnar avulsion) tears. The Palmer Classification does not currently categorize this combined pattern. All but one patient had a traumatic injury. Each subject had preoperative radiographs and MRI scans. TFC tears were evident on all MRI scans, though only one was suggestive of a combined tear pat - tern. Surgical management included arthroscopic central tear debridement and ulnar peripheral repair. Average follow-up was 22 months. Grip strength in the affected hand improved from 16% deficit as compared to the unaffected side, to 3.5% deficit postoperatively (p = 0.003), and visual analog scores (VAS) decreased from an average of 7.1/10 preoperatively to 2.3/10 postoperatively (p < 0.001). There was no statistically significant change in wrist range of motion (ROM), however. Arthroscopic debridement of the central perforation (1A lesion) with concomitant repair of the ulnar detachment (1B lesion) resulted in functional and symptomatic improvement. This combined 1A/1B TFC injury is not reliably diagnosed preoperatively and should be considered a new subset in the Palmer classification, as this will raise awareness of its presence and assist in preoperative planning of such lesions.

  12. Integrated Palmer Amaranth Management in Glufosinate-Resistant Cotton: I. Soil-Inversion, High-Residue Cover Crops and Herbicide Regimes

    Directory of Open Access Journals (Sweden)

    Michael G. Patterson

    2012-11-01

    Full Text Available A three year field experiment was conducted to evaluate the role of soil-inversion, cover crops and herbicide regimes for Palmer amaranth between-row (BR and within-row (WR management in glufosinate-resistant cotton. The main plots were two soil-inversion treatments: fall inversion tillage (IT and non-inversion tillage (NIT. The subplots were three cover crop treatments: crimson clover, cereal rye and winter fallow; and sub subplots were four herbicide regimes: preemergence (PRE alone, postemergence (POST alone, PRE + POST and a no herbicide check (None. The PRE herbicide regime consisted of a single application of pendimethalin at 0.84 kg ae ha−1 plus fomesafen at 0.28 kg ai ha−1. The POST herbicide regime consisted of a single application of glufosinate at 0.60 kg ai ha−1 plus S-metolachlor at 0.54 kg ai ha−1 and the PRE + POST regime combined the prior two components. At 2 weeks after planting (WAP cotton, Palmer amaranth densities, both BR and WR, were reduced ≥90% following all cover crop treatments in the IT. In the NIT, crimson clover reduced Palmer amaranth densities >65% and 50% compared to winter fallow and cereal rye covers, respectively. At 6 WAP, the PRE and PRE + POST herbicide regimes in both IT and NIT reduced BR and WR Palmer amaranth densities >96% over the three years. Additionally, the BR density was reduced ≥59% in no-herbicide (None following either cereal rye or crimson clover when compared to no-herbicide in the winter fallow. In IT, PRE, POST and PRE + POST herbicide regimes controlled Palmer amaranth >95% 6 WAP. In NIT, Palmer amaranth was controlled ≥79% in PRE and ≥95% in PRE + POST herbicide regimes over three years. POST herbicide regime following NIT was not very consistent. Averaged across three years, Palmer amaranth controlled ≥94% in PRE and PRE + POST herbicide regimes regardless of cover crop. Herbicide regime effect on cotton yield was highly significant; the maximum cotton yield was

  13. Severe anemia caused by babesiosis in a maned wolf (Chrysocyon brachyurus).

    Science.gov (United States)

    Phair, Kristen A; Carpenter, James W; Smee, Nicole; Myers, Carl B; Pohlman, Lisa M

    2012-03-01

    An 8-yr-old, captive, spayed, female maned wolf (Chrysocyon brachyurus) developed progressive lethargy and weakness over a 24-hr period. Clinical signs included vomiting, recumbency, horizontal nystagmus, possible blindness, pale icteric mucus membranes, and port-wine colored urine. A complete blood cell count revealed severe anemia (packed cell volume [PCV], 6%) and intraerythrocytic piroplasms consistent with a Babesia species. Polymerase chain reaction testing later confirmed babesiosis. The wolf was treated with imidocarb dipropionate, antibiotics, and fluid therapy. A whole-blood transfusion from a sibling maned wolf also was performed. Despite aggressive treatment, the wolf failed to improve and was euthanized. To the authors' knowledge, this is the first documented case of babesiosis in a captive maned wolf in North America. Surveillance of infectious diseases in captive and wild maned wolf populations should be expanded to include screening for Babesia species. Tick control also should be implemented to prevent and decrease transmission of the disease to this endangered species.

  14. Wolf Attack Probability: A Theoretical Security Measure in Biometric Authentication Systems

    Science.gov (United States)

    Une, Masashi; Otsuka, Akira; Imai, Hideki

    This paper will propose a wolf attack probability (WAP) as a new measure for evaluating security of biometric authentication systems. The wolf attack is an attempt to impersonate a victim by feeding “wolves” into the system to be attacked. The “wolf” means an input value which can be falsely accepted as a match with multiple templates. WAP is defined as a maximum success probability of the wolf attack with one wolf sample. In this paper, we give a rigorous definition of the new security measure which gives strength estimation of an individual biometric authentication system against impersonation attacks. We show that if one reestimates using our WAP measure, a typical fingerprint algorithm turns out to be much weaker than theoretically estimated by Ratha et al. Moreover, we apply the wolf attack to a finger-vein-pattern based algorithm. Surprisingly, we show that there exists an extremely strong wolf which falsely matches all templates for any threshold value.

  15. Ring nebulae associated with Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Chu, Y.-H.

    1982-01-01

    Using strict selection criteria, the author and colleagues have searched for ring nebulae associated with Wolf-Rayet stars in the Galaxy and the Magellanic Clouds. 15 WR ring nebulae are identified in the Galaxy, 9 in the Large Magellanic Cloud, and none in the small Magellanic Cloud. The morphology and kinematics of these 24 nebulae have subsequently been observed to study their nature. These nebulae and their references are listed and a correlation between spectral and nebular types is presented. (Auth.)

  16. How massive the Wolf-Rayet stars are

    International Nuclear Information System (INIS)

    Niemela, V.S.

    1981-01-01

    If the Wolf-Rayet stars are produced by the evolution of massive stars with mass loss (Paczynski 1967, Conti 1976) from O stars to WN stars and thereafter to WC stars, then we may expect to observe a correlation of decreasing mean masses in the same sense as the evolution. Information about the masses of WR stars are obtained from studies of binary systems with WR components. (Auth.)

  17. The Wolf-Rayet stars in 30 Doradus

    International Nuclear Information System (INIS)

    Melnick, J.

    1982-01-01

    The second brightest giant HII region in the sky is the 30 Doradus nebula in the LMC. This cluster contains many WR stars and may be one of the best objects where general ideas about the origin and evolution of WR stars can be tested. The author briefly describes observations of WR stars in 30 Doradus and discusses the implications for Wolf-Rayet evolutionary theories. (Auth.)

  18. Implications of teenagers' attitudes toward maned wolf conservation in Brazil

    OpenAIRE

    Consorte-McCrea, A.; Nigbur, D.; Bath, A.

    2017-01-01

    The relationships between people and wild canids are a widespread concern for the conservation of species and habitats. The maned wolf Chrysocyon brachyurus is a Near Threatened species inhabiting South America. Strategies to conserve this keystone species may benefit the also-declining Cerrado biome. The attitudes of teenagers toward wild carnivores are also of worldwide interest as these youth are the future decision makers. We investigated selected attitudes, beliefs and knowledge in relat...

  19. Canine parvovirus effect on wolf population change and pup survival

    Science.gov (United States)

    Mech, L.D.; Goyal, S.M.

    1993-01-01

    Canine parvovirus infected wild canids more than a decade ago, but no population effect has been documented. In wild Minnesota wolves (Canis lupus) over a 12-yr period, the annual percent population increase and proportion of pups each were inversely related to the percentage of wolves serologically positive to the disease. Although these effects did not seem to retard this large extant population, similar relationships in more isolated wolf populations might hinder recovery of this endangered and threatened species.

  20. AHP 6: The Brag 'go Wolf Begging Ritual

    Directory of Open Access Journals (Sweden)

    Mgon po tshe ring

    2010-06-01

    Full Text Available A ritual performed in 1999 in Dge rtse (Genzhi 更知 Township, Brag 'go (Luhuo 炉霍 County, Dkar mdzes (Ganzi 甘孜 Tibetan Autonomous Prefecture, Sichuan (四川 Province is described. The ritual involved a man, his son, and his nephew taking a wolf skin, visiting nine villages, and asking for donations to appease the 'owner of the wolves'.

  1. Preventing Lone Wolf Terrorism: some CT Approaches Addressed

    OpenAIRE

    Edwin Bakker; Beatrice de Graaf

    2011-01-01

    After a brief discussion of the epistemological and phenomenological difficulties associated with the concept of lone wolf terrorism, a number of possible counter-terrorist approaches are discussed. Lone operator terrorist acts should be considered ‘black swan’ occurrences that are almost impossible to categorize or systematize, let alone forecast. Thus, not the profile of the perpetrator, but the modus operandi offer clues for a better response to this particular threat. Furtherm...

  2. Anesthetic considerations for a pediatric patient with Wolf-Hirschhorn syndrome: a case report

    OpenAIRE

    Tsukamoto, Masanori; Yamanaka, Hitoshi; Yokoyama, Takeshi

    2017-01-01

    Wolf-Hirschhorn syndrome is a rare hereditary disease that results from a 4p chromosome deletion. Patients with this syndrome are characterized by craniofacial dysgenesis, seizures, growth delay, intellectual disability, and congenital heart disease. Although several cases have been reported, very little information is available on anesthetic management for patients with Wolf-Hirschhorn syndrome. We encountered a case requiring anesthetic management for a 2-year-old girl with Wolf-Hirschhorn ...

  3. Long-distance dispersal connects Dinaric-Balkan and Alpine grey wolf (Canis lupus) populations

    OpenAIRE

    Ražen, Nina; Kljun, Franc; Kos, Ivan; Krofel, Miha; Luštrik, Roman; Majić Skrbinšek, Aleksandra; Potočnik, Hubert

    2017-01-01

    In the last two centuries, persecution and deforestation caused grey wolf Canis lupus populations in Europe to decline. Recently, their numbers started to recover although most populations still remain isolated from one another. This study presents the first documented evidence of the successful reconnection of the Dinaric-Balkan and the Alpine wolf populations via long distance dispersal and subsequent reproduction. A young male wolf radiocollared in the Dinaric Mountains in July...

  4. The theory of radiation driven stellar winds and the Wolf-Rayet phenomenon

    International Nuclear Information System (INIS)

    Abbott, D.C.

    1982-01-01

    The author considers the question of whether the mass loss observed from Wolf-Rayet stars can be explained by a version of wind theory which is scaled to the conditions found in the envelopes of Wolf-Rayet stars. He discusses the following topics: - The calculated radiation pressure in OB stars, and its dependence on temperature, density, and chemical composition. - A comparison between predicted and observed mass loss rates and terminal velocities for OB stars. - The applicability of the standard radiation driven wind models to Wolf-Rayet stars. - Speculations on how Wolf-Rayet stars achieve their enormous mass loss rates within the context of the radiation pressure mechanism. (Auth.)

  5. Extinguishing a learned response in a free-ranging gray wolf (Canis lupus)

    Science.gov (United States)

    Mech, L. David

    2017-01-01

    A free-ranging Gray Wolf (Canis lupus), habituated to human presence (the author) on Ellesmere Island, Canada, learned to anticipate experimental feeding by a human, became impatient, persistent, and bold and exhibited stalking behaviour toward the food source. Only after the author offered the wolf about 90 clumps of dry soil over a period of 45 minutes in three bouts, did the wolf give up this behaviour. To my knowledge, this is the first example of extinguishing a learned response in a free-ranging wolf and provides new insight into the learning behaviour of such animals.

  6. Camera Traps on Wildlife Crossing Structures as a Tool in Gray Wolf (Canis lupus) Management - Five-Years Monitoring of Wolf Abundance Trends in Croatia.

    Science.gov (United States)

    Šver, Lidija; Bielen, Ana; Križan, Josip; Gužvica, Goran

    2016-01-01

    The conservation of gray wolf (Canis lupus) and its coexistence with humans presents a challenge and requires continuous monitoring and management efforts. One of the non-invasive methods that produces high-quality wolf monitoring datasets is camera trapping. We present a novel monitoring approach where camera traps are positioned on wildlife crossing structures that channel the animals, thereby increasing trapping success and increasing the cost-efficiency of the method. In this way we have followed abundance trends of five wolf packs whose home ranges are intersected by a motorway which spans throughout the wolf distribution range in Croatia. During the five-year monitoring of six green bridges we have recorded 28 250 camera-events, 132 with wolves. Four viaducts were monitored for two years, recording 4914 camera-events, 185 with wolves. We have detected a negative abundance trend of the monitored Croatian wolf packs since 2011, especially severe in the northern part of the study area. Further, we have pinpointed the legal cull as probable major negative influence on the wolf pack abundance trends (linear regression, r2 > 0.75, P Croatia until there is more data proving population stability. In conclusion, quantitative methods, such as the one presented here, should be used as much as possible when assessing wolf abundance trends.

  7. Wolf restoration to the Adirondacks: the advantages and disadvantages of public participation in the decision

    Science.gov (United States)

    Mech, L. David; Sharpe, V.A.; Norton, B.; Donnelley, S.

    2000-01-01

    The first time I ever saw a wolf in New York State's Adirondack Mountains was in 1956. It was a brush wolf, or coyote (Canis latrans), not a real wolf, but to an eager young wildlife student this distinction meant little. The presence of this large deer-killing canid let my fresh imagination view the Adirondacks as a real northern wilderness. Since then I have spent the last 40 years studying the real wolf: the gray wolf (Canis lupus). Although inhabiting nearby Quebec and Ontario, the gray wolf still has not made its way back to the Adirondacks as it has to Wisconsin, Michigan, and Montana. Those three states had the critical advantages of a nearby reservoir population of wolves and wilderness corridors through which dispersers from the reservoirs could immigrate. The Adirondacks, on the other hand, are geographically more similar to the greater Yellowstone area in that they are separated from any wolf reservoir by long distances and intensively human-developed areas aversive to wolves from the reservoir populations. If wolves are to return to the Adirondacks, they almost certainly will have to be reintroduced, as they were to Yellowstone National Park. Wolf reintroduction, as distinct from natural recovery, is an especially contentious issue, for it entails dramatic, deliberate action that must be open to public scrutiny, thorough discussion and review, and highly polarized debate. This is as it should be because once a wolf population is reintroduced to an area, it must be managed forever. There is no turning back. The wolf was once eradicated not just from the Adirondacks but from almost all of the 48 contiguous states. That feat was accomplished by a primarily pioneering society that applied itself endlessly to the task, armed with poison. We can never return to those days, so once the wolf is reintroduced successfully, it will almost certainly be here to stay.

  8. Overlapping Residual Herbicides for Control of Photosystem (PS) II- and 4-Hydroxyphenylpyruvate Dioxygenase (HPPD)-Inhibitor-Resistant Palmer amaranth (Amaranthus palmeri S. Watson) in Glyphosate-Resistant Maize

    Science.gov (United States)

    Chahal, Parminder S.; Ganie, Zahoor A.; Jhala, Amit J.

    2018-01-01

    A Palmer amaranth (Amaranthus palmeri S. Watson) biotype has evolved resistance to photosystem (PS) II- (atrazine) and 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibiting herbicides (mesotrione, tembotrione, and topramezone) in maize seed production field in Nebraska, USA. The objectives of this study were to determine the effect of soil residual pre-emergence (PRE) herbicides followed by (fb) tank-mixture of residual and foliar active post-emergence (POST) herbicides on PS-II- and HPPD-inhibitor-resistant Palmer amaranth control, maize yield, and net economic returns. Field experiments were conducted in a grower's field infested with PS II- and HPPD-inhibitor-resistant Palmer amaranth near Shickley in Fillmore County, Nebraska, USA in 2015 and 2016. The contrast analysis suggested that saflufenacil plus dimethenamid-P or pyroxasulfone plus saflufenacil applied PRE provided 80–82% Palmer amaranth control compared to 65 and 39% control with saflufenacil and pyroxasulfone applied alone at 3 weeks after PRE (WAPRE), respectively. Among the PRE fb POST herbicide programs, 95–98% Palmer amaranth control was achieved with pyroxasulfone plus safluefenacil, or saflufenacil plus dimethenamid-P applied PRE, fb glyphosate plus topramezone plus dimethenamid-P plus atrazine, glyphosate plus diflufenzopyr plus dicamba plus pyroxasulfone, glyphosate plus diflufenzopyr plus pendimethalin, or glyphosate plus diflufenzopyr plus dicamba plus atrazine applied POST at 3 weeks after POST (WAPOST) through maize harvest. Based on contrast analysis, PRE fb POST programs provided 77–83% Palmer amaranth control at 3 WAPOST through maize harvest compared to 12–15% control with PRE-only and 66–84% control with POST-only programs. Similarly, PRE fb POST programs provided 99% biomass reduction at 6 WAPOST compared to PRE-only (28%) and POST-only (87%) programs. PRE fb POST programs provided higher maize yield (13,617 kg ha−1) and net return (US $1,724 ha−1) compared to the PRE

  9. Exploring the Components of the Palmer Drought Indices Using the Apalachicola-Chattahoochee-Flint (ACF) River Basin as a Case Study

    Science.gov (United States)

    Perrone, D.; Duncan, L. L.; Jacobi, J. H.; Hornberger, G.

    2012-12-01

    Water resources are vital to sustaining ecosystem services, energy and food supplies, and industrial processes. Competition for water resources is likely to intensify as the population increases, economy grows, and land develops. Drought events intensify water scarcity, and recent events in many countries, including the United States (US), Great Britain, and Sri Lanka, highlight how important it is to provide meaningful context to water planners and managers. Palmer's drought indices - Z Index, Palmer Drought Severity Index (PDSI), and Palmer Hydrological Drought Index (PHDI) - are widely used and accepted by scientists and policy makers in the US to understand drought and manage water resources. Drought index values at the climate division scale are available, but a transparent calculation tool at multiple spatial and temporal scales is not readily available. Moreover, a close look at the development of the indices reveals a number of subjective calculation methods and regionally biased factors. For researchers studying areas with overlapping climate divisions, performing international research, or working with limited, site-specific data, the ability to control and modify calculations is desired. This research presents a transparent tool for calculating Palmer's drought indices. We use the Apalachicola-Chattahoochee-Flint (ACF) River Basin, located in the southeastern US, as our case study to explore and evaluate the sensitivity of Palmer's indices to temperature and precipitation anomalies, calibration periods, and other index components. The ACF has suffered two major droughts (2007 and 2012) in the past five years and supports multiple demand-side sectors - agriculture in Georgia, public and recreational supply for the Atlanta metropolitan area, hydroelectric power in Alabama, tri-state navigation, and ecosystem services. We show how the PDSI varies in response to changes in precipitation, calibration period, and a number of other variables. The aim of the

  10. [Dennis Hormuth. Livonia est omnis divisa in partes tres : Studien zu mental mapping der livländischen Chronistik in der Frühen Neuzeit (1558-1710) ] / Stefan Donecker

    Index Scriptorium Estoniae

    Donecker, Stefan, 1977-

    2014-01-01

    Arvustus: Hormuth, Dennis. Livonia est omnis divisa in partes tre : Studien zu mental mapping der livländischen Chronistik in der Frühen Neuzeit (1558-1710). (Quellen und Studien zur Geschichte des östlichen Europa, 79). Stuttgard, 2012

  11. [Dennis Hormuth. Livonia est omnis divisa in partes tres : Studien zum mental mapping der livländischen Chronistik in der Frühen Neuzeit (1558-1721)] / Anti Selart

    Index Scriptorium Estoniae

    Selart, Anti, 1973-

    2013-01-01

    Arvustus: Hormuth, Dennis. Livonia est omnis divisa in partes tres : Studien zum mental mapping der livländischen Chronistik in der Frühen Neuzeit (1558-1721) (Quellen und Studien zur Geschichte des östlichen Europa, 79). Franz Steiner verlag. Stuttgart 2012

  12. Science, economics, and rhetoric: environmental advocacy and the wolf reintroduction debate, 1987-1999

    Science.gov (United States)

    Dayle C. Hardy-Short; C. Brant Short

    2000-01-01

    This paper examines the arguments employed in the debate over reintroduction of wolves into Idaho, Montana, and the Yellowstone National Park Ecosystem; and in Arizona and New Mexico. The study reviews common rhetorical themes used by advocates and opponents of wolf reintroduction and identifies a significant rhetorical shift in the debate. Advocates opposed to wolf...

  13. Are luminous and metal-rich Wolf-Rayet stars inflated?

    NARCIS (Netherlands)

    Petrovic, J.; Pols, O.; Langer, N.

    2006-01-01

    Aims.We investigate the influence of metallicity and stellar wind mass loss on the radius of Wolf-Rayet stars.
    Methods: .We have calculated chemically homogeneous models of Wolf-Rayet stars of 10 to 200 Mo for two metallicities (Z=0.02 and Z=0.001), without mass loss, using OPAL

  14. The Work-Related Flow Inventory: Construction and Initial Validation of the WOLF

    Science.gov (United States)

    Bakker, Arnold B.

    2008-01-01

    The WOrk-reLated Flow inventory (WOLF) measures flow at work, defined as a short-term peak experience characterized by absorption, work enjoyment, and intrinsic work motivation. Results of Study 1 among 7 samples of employees (total N=1346) from different occupational groups offer support for the factorial validity and reliability of the WOLF.…

  15. In vivo evaluation of the hypoglycemic effect of wolf-apple flour ...

    African Journals Online (AJOL)

    The prevalence of diabetes has increased at alarming rates worldwide, and has become a serious health problem in modern society, highlighting the need for adjuvants to assist in its treatment. The starch from wolf-apple is a product extracted from the pulp of the unripe wolf-apple (Solanum lycocarpum A. St.-Hil), which ...

  16. 75 FR 24741 - Endangered and Threatened Wildlife and Plants; Mexican Wolf (Canis lupus baileyi) Conservation...

    Science.gov (United States)

    2010-05-05

    ...] Endangered and Threatened Wildlife and Plants; Mexican Wolf (Canis lupus baileyi) Conservation Assessment... Mexico Ecological Services Field Office, 2105 Osuna NE, Albuquerque, NM 87113; by telephone at 505-761... guided by the 1982 Mexican Wolf Recovery Plan (U.S. Fish and Wildlife Service 1982) (recovery plan...

  17. Sarcocystis arctica (Apicomplexa: Sarcocystidae): ultrastructural description and its new host record, the Alaskan wolf (Canis lupus

    Science.gov (United States)

    Sarcocystis sarcocysts are common in muscles of herbivores but are rare in muscles of carnivores. Here, we report sarcocysts in muscle of an Alaskan wolf (Canis lupus) from Alaska, USA for the first time. Sarcocysts extracted from tongue of the wolf were up to 900 µm long, slender, and appeared to h...

  18. Wolf (Canis lupus) generation time and proportion of current breeding females by age

    Science.gov (United States)

    Mech, L. David; Barber-Meyer, Shannon M.; Erb, John

    2016-01-01

    Information is sparse about aspects of female wolf (Canis lupus) breeding in the wild, including age of first reproduction, mean age of primiparity, generation time, and proportion of each age that breeds in any given year. We studied these subjects in 86 wolves (113 captures) in the Superior National Forest (SNF), Minnesota (MN), during 1972–2013 where wolves were legally protected for most of the period, and in 159 harvested wolves from throughout MN wolf range during 2012–2014. Breeding status of SNF wolves were assessed via nipple measurements, and wolves from throughout MN wolf range, by placental scars. In the SNF, proportions of currently breeding females (those breeding in the year sampled) ranged from 19% at age 2 to 80% at age 5, and from throughout wolf range, from 33% at age 2 to 100% at age 7. Excluding pups and yearlings, only 33% to 36% of SNF females and 58% of females from throughout MN wolf range bred in any given year. Generation time for SNF wolves was 4.3 years and for MN wolf range, 4.7 years. These findings will be useful in modeling wolf population dynamics and in wolf genetic and dog-domestication studies.

  19. A Teacher is Forever: The Legacy of Harry Kirke Wolfe (1858-1918).

    Science.gov (United States)

    Benjamin, Ludy T. Jr.

    1987-01-01

    This article traces the career of Harry Kirke Wolfe, Nebraska educator and one of the earliest U.S. psychologists to earn a doctorate in psychology from Wilhelm Wundt at Leipzig. Emphasis is placed on Wolfe's blending of psychology and pedagogy, and his qualities as a teacher. (Author/JDH)

  20. Zosteriform impetigo: Wolf's isotopic response in a cutaneous immunocompromised district.

    Science.gov (United States)

    Cohen, Philip R

    2015-07-01

    Impetigo can result from Staphylococcus aureus (S. aureus). Wolf's isotopic response is the occurrence of a new cutaneous disorder at the site of a previously healed disease. A cutaneous immunocompromised district is an area of skin that is more vulnerable than the rest of the individual's body. To describe a man with impetigo localized to a unilateral dermatome and review the clinical features of other patients with zosteriform Staphylococcus aureus cutaneous infection. PubMed was used to search the following terms, separately and in combination: cutaneous, dermatome, dermatomal, district, herpes, immunocompromised, impetigo, infection, isotopic, response, skin, staphylococcal, Staphylococcus aureus, Wolf, zoster, zosteriform. All papers were reviewed and relevant manuscripts, along with their reference citations, were evaluated. Crusted, eroded and intact, erythematous papules and nodules acutely presented localized to the mandibular branch of the left trigeminal nerve on the face of a 66-year-old man; he did not recall a prior episode of varicella-zoster virus infection in that area. A bacterial culture isolated methicillin-susceptible S. aureus. Viral cultures and direct fluorescent absorption studies were negative for herpes simplex and herpes zoster virus. All of the lesions resolved after oral treatment with cefdinir. Impetigo and/or furunculosis in a zosteriform distribution have also been described in 3 additional patients. The bacterial culture showed either methicillin-susceptible or methicillin-resistant S. aureus; the skin infection resolved after treatment with oral antibiotics; however one man experienced 2 recurrences in the same area. Zosteriform cutaneous staphylococcal impetigo may be an example of Wolf's isotopic response in a cutaneous immunocompromised district.

  1. 76 FR 61781 - Endangered and Threatened Wildlife and Plants; Removal of the Gray Wolf in Wyoming From the...

    Science.gov (United States)

    2011-10-05

    ... gray wolf reintroductions in central Idaho and in Yellowstone National Park (YNP). The Yellowstone... Wolves to Yellowstone National Park and Central Idaho (EIS) reviewed wolf recovery in the NRM region and... Service 50 CFR Part 17 Endangered and Threatened Wildlife and Plants; Removal of the Gray Wolf in Wyoming...

  2. Patterns of wolf pack movements prior to kills as read from tracks in Algonquin Provincial Park, Ont., Canada

    NARCIS (Netherlands)

    Frijlink, Jan Hilco

    1977-01-01

    From data, gathered by the author and his students, during a wolf study in Algonquin Provincial Park, Canada, six kills of white-tailed deer by wolf packs are described. Case histories are reconstructed by means of interpreting tracks. In one case a wolf was also killed, this animal turned out to

  3. Spectra of the Wolf-Rayet stars in 30 Doradus

    International Nuclear Information System (INIS)

    Conti, P.S.

    1982-01-01

    The central cluster of the 30 Doradus complex in the Large Magellanic Cloud (LMC) contains at least a dozen Wolf-Rayet (W-R) stars of the nitrogen sequence according to Melnick (1978). In addition to the six stars previously identified by Feast, Thackeray and Wesselinck (1960), Melnick identified an additional six using an Echele spectrograph on the 1.52 m telescope at La Silla. The author has obtained high resolution spectra of ten of these stars and discusses the spectral types. (Auth.)

  4. Wolf-Hirschhorn syndrome (WHS): a history in pictures.

    Science.gov (United States)

    Battaglia, A; Carey, J C; Viskochil, D H; Cederholm, P; Opitz, J M

    2000-01-01

    The Wolf-Hirschhorn syndrome (WHS) is a well known chromosomal disorder, due to a deletion of distal chromosome 4p. The classical gestalt is striking and poses few diagnostic problems. However, due to the difficulty of detecting very small deletions by standard cytogenetics, diagnosis can be sometimes very difficult, particularly in older patients. In this paper we show the changes, occurring over time, in facial appearance of affected individuals, to improve insight into the evolution of the phenotype, and to increase its diagnostic potential.

  5. Wolf-Hirschhorn (4p-) syndrome with West syndrome.

    Science.gov (United States)

    Motoi, Hirotaka; Okanishi, Tohru; Kanai, Sotaro; Yokota, Takuya; Yamazoe, Tomohiro; Nishimura, Mitsuyo; Fujimoto, Ayataka; Yamamoto, Takamichi; Enoki, Hideo

    2016-01-01

    Wolf-Hirschhorn syndrome (WHS) is a chromosome disorder (4p-syndrome) which is characterized by craniofacial features and epileptic seizures. Here, we report a case of WHS with West syndrome, in whom the seizures were refractory to several antiepileptic drugs but were responsive to the addition of lamotrigine. The patient had epileptic spasms at age seven months. The interictal electroencephalogram was hypsarrhythmic. After adding lamotrigine, seizures decreased remarkably, and spasms disappeared. We have identified and described the very rare case of a girl with WHS who also developed West syndrome. In this case, adding lamotrigine to her medications effectively treated the spasms.

  6. Is climate change affecting wolf populations in the high Arctic?

    Science.gov (United States)

    Mech, L.D.

    2004-01-01

    Gobal climate change may affect wolves in Canada's High Arctic (80?? N) acting through three trophic levels (vegetation, herbivores, and wolves). A wolf pack dependent on muskoxen and arctic hares in the Eureka area of Ellesmere Island denned and produced pups most years from at least 1986 through 1997. However, when summer snow covered vegetation in 1997 and 2000 for the first time since records were kept, halving the herbivore nutrition-replenishment period, muskox and hare numbers dropped drastically, and the area stopped supporting denning wolves through 2003. The unusual weather triggering these events was consistent with global-climate-change phenomena. ?? 2004 Kluwer Academic Publishers.

  7. Airway Management in a Patient with Wolf-Hirschhorn Syndrome.

    Science.gov (United States)

    Gamble, John F; Kurian, Dinesh J; Udani, Andrea G; Greene, Nathaniel H

    2016-01-01

    We present a case of a 3-month-old female with Wolf-Hirschhorn syndrome (WHS) undergoing general anesthesia for laparoscopic gastrostomy tube placement with a focus on airway management. WHS is a rare 4p microdeletion syndrome resulting in multiple congenital abnormalities, including craniofacial deformities. Microcephaly, micrognathia, and glossoptosis are common features in WHS patients and risk factors for a pediatric airway that is potentially difficult to intubate. We discuss anesthesia strategies for airway preparation and management in a WHS patient requiring general anesthesia with endotracheal intubation.

  8. Airway Management in a Patient with Wolf-Hirschhorn Syndrome

    Directory of Open Access Journals (Sweden)

    John F. Gamble

    2016-01-01

    Full Text Available We present a case of a 3-month-old female with Wolf-Hirschhorn syndrome (WHS undergoing general anesthesia for laparoscopic gastrostomy tube placement with a focus on airway management. WHS is a rare 4p microdeletion syndrome resulting in multiple congenital abnormalities, including craniofacial deformities. Microcephaly, micrognathia, and glossoptosis are common features in WHS patients and risk factors for a pediatric airway that is potentially difficult to intubate. We discuss anesthesia strategies for airway preparation and management in a WHS patient requiring general anesthesia with endotracheal intubation.

  9. Wolf, Canis lupus, visits to white-tailed deer, Odocoileus virginianus, summer ranges: Optimal foraging?

    Science.gov (United States)

    Demma, D.J.; Mech, L.D.

    2009-01-01

    We tested whether Wolf (Canis lupus) visits to individual female White-tailed Deer (Odocoileus virginianus) summer ranges during 2003 and 2004 in northeastern Minnesota were in accord with optimal-foraging theory. Using GPS collars with 10- to 30-minute location attempts on four Wolves and five female deer, plus eleven VHF-collared female deer in the Wolves' territory, provided new insights into the frequency of Wolf visits to summer ranges of female deer. Wolves made a mean 0.055 visits/day to summer ranges of deer three years and older, significantly more than their 0.032 mean visits/day to ranges of two-year-old deer, which generally produce fewer fawns, and most Wolf visits to ranges of older deer were much longer than those to ranges of younger deer. Because fawns comprise the major part of the Wolf's summer diet, this Wolf behavior accords with optimal-foraging theory.

  10. Spectrophotometry of ring nebulae around Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Kwitter, K.B.

    1979-01-01

    Spectrophotometric observations of four ring nebulae surrounding population I Wolf-Rayet (WN) stars have been obtained, and four additional filamentary nebulae in order to determine the physical conditions and chemical abundances in these objects. It was concluded that the ring nebulae are enriched in nitrogen and helium as a result of contamination of the ambient interstellar medium by the helium- and nitrogen-rich wind from the central Wolf-Rayet star. Of the additional nebulae studied, two were found to be Peimbert Type I planetary nebulae, overabundant in nitrogen and helium due to mixing of CNO processed material into the parent envelope prior to ejection. One of the remaining objects, a shell around an Oef star, is found to have normal abundances; the other, a small H II region around an early Be star, also exhibits normal abundances. It was attempted to interpret the ring nebulae and the Oef shell as interstellar bubbles, according to recent theory; it met with varying degrees of success. For two of the ring nebulae, the fraction of nebular mass contributed by the central star can be estimated from published stellar abundances. It was found that in these two cases, the stellar wind has provided less than 10% of the observed nebular mass

  11. The effective temperatures of early Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Schmutz, W.

    1982-01-01

    Nussbaumer et al. (1981) (NSSW) have calculated temperatures of 15 Wolf-Rayet stars, which cover most subtypes in the WN and WC sequences. Some Wolf-Rayet stars are found to have a blackbody-like energy distribution and therefore their effective temperature can be well determined, others show deviation from the blackbody shape. This deviation is probably due to an extended continuum emitting region. In view of these later cases NSSW adopted a temperature which they derived from a Zanstra analysis of the He II recombination lines. According to their analysis there should be a continuum jump at 2050 A. New IUE observations of the WN 5 star HD 50896 however did not show any trace of such an absorption edge. This implies that the effective temperature of this WN 5 star and probably of all WR stars with a non blackbody energy distribution is not yet known accurately. Therefore the author started a detailed analysis with a spherically symmetric atmosphere model. Though the model has not yet reached its final shape he has obtained as a first result that the location of HD 50896 in the HR-diagram is to the left of the ZAMS and that the Zanstra analysis is indeed not valid for this star. (Auth.)

  12. Theories for the winds from Wolf Rayet stars

    International Nuclear Information System (INIS)

    Cassinelli, J.P.

    1982-01-01

    The massive and fast winds of Wolf Rayet stars present a serious momentum problem for the line-driven wind theories that are commonly used to explain the fast winds of early type stars. It is perhaps possible for the winds to be driven by lines, if multiple scattering occurs and if there are a sufficient number of lines in the spectrum so that large fraction of the continuum is blocked by line opacity in the winds. Several other mechanisms are discussed, in particular two that rely on strong magnetic fields: a) Alfven wave driven wind models like those recently developed by Hartmann and MacGregor for late type supergiants and b) the ''Fast Magnetic Rotator'' model that was developed by Belcher and MacGregor for the winds from pre-main sequence stars. In either model, large magnetic fields (approximately equal to 10 4 gauss) are required to drive the massive and fast winds of Wolf Rayet stars. Smaller fields might be possible if the multiple scattering line radiation force can be relied on to provide a final acceleration to terminal velocity. (Auth.)

  13. The origins of the enigmatic Falkland Islands wolf.

    Science.gov (United States)

    Austin, Jeremy J; Soubrier, Julien; Prevosti, Francisco J; Prates, Luciano; Trejo, Valentina; Mena, Francisco; Cooper, Alan

    2013-01-01

    The origins of the extinct Falkland Islands wolf (FIW), Dusicyon australis, have remained a mystery since it was first recorded by Europeans in the seventeenth century. It is the only terrestrial mammal on the Falkland Islands (also known as the Malvinas Islands), which lie ~460 km from Argentina, leading to suggestions of either human-mediated transport or overwater dispersal. Previous studies used ancient DNA from museum specimens to suggest that the FIW diverged from its closest living relative, the South American maned wolf (Chrysocyon brachyurus) around 7 Ma, and colonized the islands ~330 ka by unknown means. Here we retrieve ancient DNA from subfossils of an extinct mainland relative, Dusicyon avus, and reveal the FIW lineage became isolated only 16 ka (8-31 ka), during the last glacial phase. Submarine terraces, formed on the Argentine coastal shelf by low sea-stands during this period, suggest that the FIW colonized via a narrow, shallow marine strait, potentially while it was frozen over.

  14. Epilepsy in a child with Wolf-Hirschhorn syndrome

    Directory of Open Access Journals (Sweden)

    Radlović Nedeljko

    2011-01-01

    Full Text Available Introduction. Wolf-Hirschhorn syndrome (WHS is a rare chromosomal disorder characterized by facial dismorphy, multiple congenital anomalies, delayed psychomotor development and pharmaco-resistant epilepsy. Case Outline. We present a 5-year-old girl with severe delay in growth and development, microcephaly, mild facial dismorphy and epilepsy. The pregnancy was complicated by intrauterine growth retardation. Generalized muscle hypotonia was observed at birth. First seizures started at age of 9 months as unilateral convulsive status epilepticus (SE, sometimes with bilateral generalization. Seizures were often triggered by fever and were resistant to antiepileptic treatment. Introduction of lamotrigine and valproate therapy led to complete seizure control at the age of 33 months. Electroencephalographic (EEG finding was typical at the beginning. After transitory improvement between age four and five years, epileptiform EEG activity appeared again at the age of five years, without observed clinical seizures. Magnetic resonance imaging showed diffuse brain atrophy and delay in myelination. Using Multiplex ligation-dependent probe amplification (MLPA method, we disclosed heterozygote microdeletation of the distal part of the short arm of chromosome 4 (4p16. Conclusion. We present a clinical course of epilepsy in a patient with Wolf-Hirschhorn syndrome. The diagnosis was verified by modern molecular technique. This is the first molecular characterization of a patient with WHS performed in our country.

  15. Modified Discrete Grey Wolf Optimizer Algorithm for Multilevel Image Thresholding

    Directory of Open Access Journals (Sweden)

    Linguo Li

    2017-01-01

    Full Text Available The computation of image segmentation has become more complicated with the increasing number of thresholds, and the option and application of the thresholds in image thresholding fields have become an NP problem at the same time. The paper puts forward the modified discrete grey wolf optimizer algorithm (MDGWO, which improves on the optimal solution updating mechanism of the search agent by the weights. Taking Kapur’s entropy as the optimized function and based on the discreteness of threshold in image segmentation, the paper firstly discretizes the grey wolf optimizer (GWO and then proposes a new attack strategy by using the weight coefficient to replace the search formula for optimal solution used in the original algorithm. The experimental results show that MDGWO can search out the optimal thresholds efficiently and precisely, which are very close to the result examined by exhaustive searches. In comparison with the electromagnetism optimization (EMO, the differential evolution (DE, the Artifical Bee Colony (ABC, and the classical GWO, it is concluded that MDGWO has advantages over the latter four in terms of image segmentation quality and objective function values and their stability.

  16. Higher spin currents in Wolf space. Part I

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, Changhyun [Department of Physics, Kyungpook National University,Taegu 702-701 (Korea, Republic of)

    2014-03-20

    For the N=4 superconformal coset theory described by ((SU(N+2))/(SU(N))) (that contains a Wolf space) with N=3, the N=2 WZW affine current algebra with constraints is obtained. The 16 generators of the large N=4 linear superconformal algebra are described by those WZW affine currents explicitly. By factoring out four spin-(1/2) currents and the spin-1 current from these 16 generators, the remaining 11 generators (spin-2 current, four spin-(3/2) currents, and six spin-1 currents) corresponding to the large N=4 nonlinear superconformal algebra are obtained. Based on the recent work by Gaberdiel and Gopakumar on the large N=4 holography, the extra 16 currents, with spin contents (1,(3/2),(3/2),2), ((3/2),2,2,(5/2)), ((3/2),2,2,(5/2)), and (2,(5/2),(5/2),3) described in terms of N=2 multiplets, are obtained and realized by the WZW affine currents. As a first step towards N=4W algebra (which is NOT known so far), the operator product expansions (OPEs) between the above 11 currents and these extra 16 higher spin currents are found explicitly. It turns out that the composite fields with definite U(1) charges, made of above (11+16) currents (which commute with the Wolf space subgroup SU(N=3)×SU(2)×U(1) currents), occur in the right hand sides of these OPEs.

  17. Path Tortuosity and the Permeability of Roads and Trails to Wolf Movement

    Directory of Open Access Journals (Sweden)

    Jesse Whittington

    2004-06-01

    Full Text Available Few studies have examined the effects of human development on fine-scale movement behavior, yet understanding animal movement through increasingly human-dominated landscapes is essential for the persistence of many wild populations, especially wary species. In mountainous areas, roads and trails may be particularly deserving of study because they are concentrated in the valley bottoms where they can impede animal movement both across and between valleys. In this study, we tracked wolf (Canis lupus movement in the snow for two winters in Jasper National Park, Alberta, Canada to examine how wolves navigate through or around human-use features. We quantified the effects of human development and topography on the tortuosity of wolf paths and then tested the permeability of roads, trails, and a railway line to wolf movement by comparing the frequency with which actual wolf paths and a null model of random paths crossed these features. Wolf path tortuosity increased near high-use trails, within areas of high-trail and road density, near predation sites, and in rugged terrain. Wolves crossed all roads, trails, and the railway line 9.7% less often than expected, but avoided crossing high-use roads more than low-use trails. Surprisingly, trails affected movement behavior of wolves equally, if not more, than roads. These results suggest that although roads and trails in this study were not absolute barriers to wolf movement, they altered wolf movements across their territories.

  18. Using radioecological data to determine prey selection by the Alaska wolf

    International Nuclear Information System (INIS)

    Holleman, D.F.; Luick, J.R.

    1978-01-01

    Recently the predation of the Alaska wolf (Canis lupus pambasileus) upon various species of big game has been the subject of considerable controversy between game management specialists and environmentalists. The basis of this controversy centers primarily on the selectivity and extent of prey utilization by the wolf. This report suggests how radioecological data can be used to assess both qualitative and quantitative aspects of wolf predation. Primary prey species of the wolf have distinctly different fallout radiocesium body burdens; e.g., reindeer/caribou have high radiocesium body burdens, whereas moose and small game have low radiocesium body burdens. Consequently, the resulting radiocesium body burden of the wolf depends upon the type and quantity of prey species consumed. Laboratory measurements for this study show a wide variation of radiocesium concentrations of skeletal muscle of wolves within Alaska. Values ranged from 263 to 17,300 pCi 137 Cs/kg of wet muscle. These data relate to known degrees of reindeer/caribou predation by the wolves. A radiocesium kinetic model was constructed from data obtained with wolves and other arctic carnivores and was used to estimate reindeer/caribou intake by wolves. Estimates ranged from 40 to 1650 g of reindeer/caribou muscle per day per wolf. Although the application has limitations, it could yield useful information for evaluating the food habits of wolves, especially in areas of the state where it is important to know the extent of reindeer/caribou utilization by the wolf

  19. Temperature profile and nutrients data collected using bottle casts from the NATHANIEL B. PALMER in the Ross Sea and Southern Oceans from 16 December 1995 to 13 January 1996 (NODC Accession 0000889)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile and nutrients data were collected using bottle casts in the Ross Sea and Southern Oceans from the NATHANIEL B. PALMER. Data were collected from...

  20. Temperature profile and nutrients data collected using bottle casts from the POLAR DUKE and NATHANIEL B. PALMER in the Ross Sea and Southern Oceans from 08 April 1997 to 05 May 1997 (NODC Accession 0000897)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile and nutrients data were collected using bottle casts in the Ross Sea and Southern Oceans from the POLAR DUKE and NATHANIEL B. PALMER. Data were...

  1. Temperature profile and nutrients data collected using bottle casts from the POLAR DUKE and NATHANIEL B. PALMER in the Ross Sea and Southern Oceans from 10 November 1997 to 12 December 1997 (NODC Accession 0000898)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile and nutrients data were collected using bottle casts in the Ross Sea and Southern Oceans from the POLAR DUKE and NATHANIEL B. PALMER. Data were...

  2. Physical, Chemical, and Biological CTD and Bottle data from NATHANIEL B. PALMER in Eastern Tropical South Pacific Ocean near Peru/Chile from 2013-06-24 to 2013-07-22 (NCEI Accession 0128141)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This report contains data from R/V Nathaniel B. Palmer cruise NBP 1305 to the eastern tropical south pacific oxygen deficient zone. The objective of the cruise was...

  3. Temperature, salinity, nutrients, and other data from CTD and bottle casts in the Southern Ocean (> 60 South) from the R/V NATHANIEL B. PALMER from 14 September 1994 to 12 October 1994 (NODC Accession 0000481)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This report includes the primary ocean station data collected in the Pacific sector of the Southern Ocean during cruise 9405 of the Nathaniel B. Palmer. The cruise...

  4. The galactic distribution of Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Hidayat, B.; Supelli, K.; Hucht, K.A. van der

    1982-01-01

    On the basis of the most recent compilation of narrow-band photometry and absolute visual magnitudes of Wolf-Rayet stars, and adopting a normal interstellar extinction law in all directions, the galactic distribution of 132 of the 159 known galactic WR stars is presented and discussed. The spiral structure is found to be more clearly pronounced than in earlier studies. Furthermore the authors find an indication of two spiral arms at r=4 and 6 kpc. There appears to be an asymmetry of the z-distribution of single stars with respect to galactic longitude. The location of the WC8.5 and WC9 stars between 4.5 and 9 kpc from the galactic center is discussed in the context of Maeder's red supergiant to WR star scenario. (Auth.)

  5. Wolf-Rayet stars in the Andromeda Galaxy

    International Nuclear Information System (INIS)

    Moffat, A.F.J.; Shara, M.M.; Space Telescope Science Institute, Baltimore, MD)

    1987-01-01

    A survey of M31 for strong-line Wolf-Rayet (W-R) stars has been completed, confirming the trends found previously, that (1) M31 is at present about an order of magnitude less active in star formation than the Galaxy, as reflected in the total number of W-R stars, assumed to have evolved from massive progenitors; (2) the number ratio of late to early WC stars, WCL/WCE, varies systematically with galactocentric radius as in the Galaxy, possibly a consequence of the metallicity gradient in the disk; and (3) most W-R stars lie in the prominent ring of active star formation at R = 7-12 kpc from the center of M31. 19 references

  6. Growth profiles of 34 patients with Wolf-Hirschhorn syndrome.

    Science.gov (United States)

    Shimojima, Keiko; Yamamoto, Toshiyuki

    2012-03-01

    Wolf-Hirschhorn syndrome (WHS) encompasses multiple congenital anomalies and mental retardation and is caused by partial deletions in the short arm of chromosome 4. Prenatal-onset growth deficiency is one of the WHS characteristics. Assessing and recording growth profiles of patients with WHS were the aims of this study. Anonymous questionnaire surveys were conducted with cooperation of a WHS peer-support group in Japan, and data from 34 WHS patients (12 males and 22 females; age, 1-23 years) were retrospectively collected. Height, weight, and head circumference (occipitofrontal head circumference) were measured and plotted on the standard growth charts of healthy Japanese children. Results indicated that most WHS patients showed growth retardation under the 3rd percentile since the first year of life and extremely poor body-weight gain after pubertal age. These findings are characteristic of WHS patients. The assessed growth patterns in this study could help monitoring and documentation of growth of WHS patients.

  7. Hepatic Malignancy in an Infant with Wolf-Hirschhorn Syndrome.

    Science.gov (United States)

    Rutter, Sara; Morotti, Raffaella A; Peterec, Steven; Gallagher, Patrick G

    2017-06-01

    Wolf-Hirschhorn syndrome (WHS) is a contiguous gene syndrome involving deletions of the chromosome 4p16 region associated with growth failure, characteristic craniofacial abnormalities, cardiac defects, and seizures. This report describes a six-month-old girl with WHS with growth failure and typical craniofacial features who died of complex congenital heart disease. Genetic studies revealed a 9.8 Mb chromosome 4p-terminal deletion. At autopsy, the liver was grossly unremarkable. Routine sampling and histologic examination revealed two hepatocellular nodular lesions with expanded cell plates and mild cytologic atypia. Immunohistochemical staining revealed these nodules were positive for glutamine synthetase and glypican 3, with increased Ki-67 signaling and diffuse CD34 expression in sinusoidal endothelium. These findings are consistent with hepatoblastoma or hepatocellular carcinoma. A possible association between WHS and hepatic malignancy may be an important consideration in the care and management of WHS patients.

  8. Mathematical models and algorithms for the computer program 'WOLF'

    International Nuclear Information System (INIS)

    Halbach, K.

    1975-12-01

    The computer program FLOW finds the nonrelativistic self- consistent set of two-dimensional ion trajectories and electric fields (including space charges from ions and electrons) for a given set of initial and boundary conditions for the particles and fields. The combination of FLOW with the optimization code PISA gives the program WOLF, which finds the shape of the emitter which is consistent with the plasma forming it, and in addition varies physical characteristics such as electrode position, shapes, and potentials so that some performance characteristics are optimized. The motivation for developing these programs was the desire to design optimum ion source extractor/accelerator systems in a systematic fashion. The purpose of this report is to explain and derive the mathematical models and algorithms which approximate the real physical processes. It serves primarily to document the computer programs. 10 figures

  9. The Search for Wolf-Rayet Stars in IC10

    Science.gov (United States)

    Tehrani, Katie; Crowther, Paul; Archer, Isabelle

    2017-11-01

    We present a deep imaging and spectroscopic survey of the Local Group starburst galaxy IC10 using Gemini North/GMOS to unveil the global Wolf-Rayet population. It has previously been suggested that for IC10 to follow the WC/WN versus metallicity dependence seen in other Local Group galaxies, a large WN population must remain undiscovered. Our search revealed 3 new WN stars, and 5 candidates awaiting confirmation, providing little evidence to support this claim. We also compute an updated nebular derived metallicity of log(O/H)+12=8.40 +/- 0.04 for the galaxy using the direct method. Inspection of IC10 WR average line luminosities show these stars are more similar to their LMC, rather than SMC counterparts.

  10. Wolf predation risk associated with white-tailed deer movements

    Science.gov (United States)

    Nelson, M.E.; Mech, L.D.

    1991-01-01

    The survival of 159 yearling and adult deer (Odocoileus virginianus) was monitored by telemetry during 282 spring and 219 fall individual migrations to winter deeryards in northeastern Minnesota. A disproportionate number of deer were killed by wolves (Canis lupus) during fall migration relative to the short time they spent migrating, but not during spring migration. Predation was also significantly greater for male and female yearlings and adult females outside deeryards during winter. Survival of 79 yearlings dispersing from natal ranges was high (1.00). It appears that changing climatic conditions combined with unfamiliar terrain and undetermined factors predispose migratory deer to wolf predation during fall. These findings support an earlier hypothesis that winter yarding is an antipredator strategy.

  11. Nutrient regulation in a predator, the wolf spider Pardosa prativaga

    DEFF Research Database (Denmark)

    Jensen, Kim; Mayntz, David; Toft, Søren

    2011-01-01

    Nutrient balancing is well known in herbivores and omnivores, but has only recently been demonstrated in predators. To test how a predator might regulate nutrients when the prey varies in nutrient composition, we restricted juvenile Pardosa prativaga wolf spiders to diets of one of six fruit fly......, Drosophila melanogaster, prey types varying in lipid:protein composition during their second instar. We collected all fly remnants to estimate food and nutrient intake over each meal. The spiders adjusted their capture rate and nutrient extraction in response to prey mass and nutrient composition...... irrespective of energy intake. Intake was initially regulated to a constant lipid plus protein mass, but later spiders fed on prey with high proportions of protein increased consumption relative to spiders fed on other prey types. This pattern indicates that the spiders were prepared to overconsume vast...

  12. The Thouless-Anderson-Palmer equation for an analogue neural network with temporally fluctuating white synaptic noise

    International Nuclear Information System (INIS)

    Ichiki, Akihisa; Shiino, Masatoshi

    2007-01-01

    Effects of synaptic noise on the retrieval process of associative memory neural networks are studied from the viewpoint of neurobiological and biophysical understanding of information processing in the brain. We investigate the statistical mechanical properties of stochastic analogue neural networks with temporally fluctuating synaptic noise, which is assumed to be white noise. Such networks, in general, defy the use of the replica method, since they have no energy concept. The self-consistent signal-to-noise analysis (SCSNA), which is an alternative to the replica method for deriving a set of order parameter equations, requires no energy concept and thus becomes available in studying networks without energy functions. Applying the SCSNA to stochastic networks requires the knowledge of the Thouless-Anderson-Palmer (TAP) equation which defines the deterministic networks equivalent to the original stochastic ones. The study of the TAP equation which is of particular interest for the case without energy concept is very less, while it is closely related to the SCSNA in the case with energy concept. This paper aims to derive the TAP equation for networks with synaptic noise together with a set of order parameter equations by a hybrid use of the cavity method and the SCSNA

  13. Appraising Loftus and Palmer (1974) post-event information versus concurrent commentary in the context of sport.

    Science.gov (United States)

    Goldschmied, Nadav; Sheptock, Mark; Kim, Kacey; Galily, Yair

    2017-11-01

    Two experiments were conducted to examine framing effects in sport. In Experiment 1, a conceptual replication [Loftus, E. F., & Palmer, J. C. (1974). Reconstruction of automobile destruction: An example of the interaction between language and memory. Journal of Verbal Learning and Verbal Behavior, 13(5), 585-589], participants watched a hockey collision, with the hit described later in a written format as a "contact", "bump", or "smash". This manipulation resulted in no differences in participants' report of how fast the players were skating, their intentions, and the outcome of the hit. In Experiment 2, participants watched the same video clip with ongoing commentary. Those who heard the announcer describing the event as "contact" estimated a higher skating speed than participants who were exposed to the "smash" commentary. Participants who were exposed to the "bump" commentary rated the repercussions of the collision as less severe than did those exposed to the other commentaries. These findings show that the perception of magnitude hierarchy may be domain specific and suggest future avenues for exploring framing effects when one is exposed to visual stimuli.

  14. Anesthetic considerations for a pediatric patient with Wolf-Hirschhorn syndrome: a case report.

    Science.gov (United States)

    Tsukamoto, Masanori; Yamanaka, Hitoshi; Yokoyama, Takeshi

    2017-09-01

    Wolf-Hirschhorn syndrome is a rare hereditary disease that results from a 4p chromosome deletion. Patients with this syndrome are characterized by craniofacial dysgenesis, seizures, growth delay, intellectual disability, and congenital heart disease. Although several cases have been reported, very little information is available on anesthetic management for patients with Wolf-Hirschhorn syndrome. We encountered a case requiring anesthetic management for a 2-year-old girl with Wolf-Hirschhorn syndrome. The selection of an appropriately sized tracheal tube and maintaining intraoperatively stable hemodynamics might be critical problems for anesthetic management. In patients with short stature, the tracheal tube size may differ from what may be predicted based on age. The appropriate size ( internal diameter ) of tracheal tubes for children has been investigated. Congenital heart disease is frequently associated with Wolf-Hirschhorn syndrome. Depending on the degree and type of heart disease, careful monitoring of hemodynamics is important.

  15. Audit of Wolf Creek Generating Station, Unit 1 technical specifications. Final technical evaluation report

    International Nuclear Information System (INIS)

    Stromberg, H.M.

    1985-07-01

    This document was prepared for the Nuclear Regulatory Commission (NRC) to assist them in determining whether the Wolf Creek Generating Station Unit 1 Technical Specifications (T/S), which govern plant systems configurations and operations, are in conformance with the assumptions of the Final Safety Analysis Report (FSAR) as amended, the requirements of the Safety Evaluation Report (SER) as supplemented, and the Comments and Responses to the Wolf Creek Technical Specification Draft Inspection Report. A comparative audit of the FSAR as amended, the SER as supplemented, and the Draft Inspection Report was performed with the Wolf Creek T/S. Several discrepancies were identified and subsequently resolved through discussions with the cognizant NRC reviewer, NRC staff reviewers and/or utility representatives. The Wolf Creek Generating Station Unit 1 T/S, to the extent reviewed, are in conformance with the FSAR, SER, and Draft Inspection Report

  16. Effects of Headcutting on the Bottomland Hardwood Wetlands Adjacent to the Wolf River, Tennessee

    National Research Council Canada - National Science Library

    Weins, Karen

    2003-01-01

    The Wolf River in western Tennessee has experienced severe channel erosion in the form of headcutting and downcutting that has extended 17 kilometers upstream from the location at which channelization ceased in 1964...

  17. Gray Wolf (Canis lupus) dyad monthly association rates by demographic group.

    Science.gov (United States)

    Barber-Meyer, Shannon M.; Mech, L. David

    2015-01-01

    Preliminary data from GPS-collared wolves (Canis lupus) in the Superior National Forest of northeastern Minnesota indicated wolves had low association rates with packmates during summer. However, aerial-telemetry locations of very high frequency (VHF)-radioed wolves in this same area showed high associations among packmates during winter. We analyzed aerial-telemetry-location data from VHF-collared wolves in several packs (n=18 dyads) in this same area from 1994-2012 by month, and found lowest association rates occurred during June. While other studies have found low association among wolf packmates during summer, information on differences in association patterns depending on the wolf associates’ demographics is sparse. During May-July, association rates were greatest for breeding pairs, followed by sibling dyads, and lowest for parent– offspring dyads. Our findings improve our understanding of how individual wolf relationships affect monthly association rates. We highlight some important remaining questions regarding wolf packmate associations.

  18. A dust shell around the early-type Wolf-Ryate star WR 19

    International Nuclear Information System (INIS)

    Williams, P.M.; Hucht, K.A. van der; Bouchet, P.

    1990-01-01

    Infrared photometry of the WC4-type Wolf-Rayet star WR 19 (LS 3) in 1988-90 shows evidence for an expanding dust shell in its wind, similar to those observed from late-type WR stars like WR 48a (WC8), WR 140 (WC7+04) and WR 137 (WC7+). This demonstrates that dust formation by Wolf-Rayet stars is not restricted to later WC subtypes and is more common than hitherto supposed. (author)

  19. The spectrum of HM Sagittae: a planetary nebula excited by a Wolf--Rayet star

    International Nuclear Information System (INIS)

    Brown, L.W.; Feibelman, W.A.; Hobbs, R.W.; Mccracken, C.W.

    1977-10-01

    Image tube spectrograms of HM Sagittae were obtained. More than 70 emission lines, including several broad emission features, were identified. An analysis of the spectra indicates that HM Sagittae is a planetary nebula excited by a Wolf-Rayet star. The most conspicuous Wolf-Rayet feature is that attributed to a blend of C III at 4650 A and He II at 4686 A

  20. Evaluating the Effectiveness of Natura 2000 Network for Wolf Conservation: A Case-Study in Greece

    Science.gov (United States)

    Votsi, Nefta-Eleftheria P.; Zomeni, Maria S.; Pantis, J. D.

    2016-02-01

    The wolf ( Canis lupus) is used as a case study to rate Natura 2000 sites in Greece based on preferred wolf habitat characteristics and test whether the network is suitable for their conservation. Road density, agricultural area, site area, connectivity, food availability (i.e., presence of natural prey), and elevation in 237 sites are combined in a logistic regression model. The occurrence of the wolf's natural prey was the most prevalent factor determining wolf presence, followed by agricultural cover. Considering the current status of these features at N2K site level, most sites currently hosting wolves (85.7 %) have good or excellent prospects for the long-term presence of the wolf. On the contrary, 11 sites which now have wolves are predicted to be ineffective in keeping them in the future due to the absence of wild ungulates and their high agricultural coverage. Four sites with no wolf presence currently have excellent prospects to host wolves in the future. Roadless sites are a priority for protection and retaining their current condition is strongly suggested. The proposed approach aims to detect gaps in protection for the wolf and identify priority sites in need of mitigation actions. It can also assist the assessment of conservation policies in Greece and elsewhere toward accomplishing set goals in protected areas. By focusing on wolf protection, we hope to increase agencies' attention to deal with conservation effectiveness, especially in cases like Greece, where a number of sites are insufficiently known and protected and management measures are not properly implemented.

  1. HD 193793, a radio-emitting Wolf-Rayet binary star

    International Nuclear Information System (INIS)

    Florkowski, D.R.; Gottesman, S.T.

    1977-01-01

    The Wolf-Rayet binary HD 193793 has been observed as a weak, unresolved radio source. The observed flux densities do not agree with the predictions of the constant-mass-flow model of Wright and Barlow and Panagia and Felli. A variable-mass-flow model is suggested and an observational test is proposed. A comparison with γ 2 Vel is made, and the parameters affecting radio emission from Wolf-Rayet stars are briefly discussed. (author)

  2. The strong 3.3 micron emission line in Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Williams, P.M.

    1982-01-01

    A number of Wolf-Rayet stars have been found to show in their spectra a strong emission feature at 3.28 μm, the wavelength of the 'unidentified' feature observed in some nebular spectra. From comparison of the strength of this line from stars of different spectral type and excitation, it is identified with the CIV (11-10) transition group and shown not to be connected with the circumstellar dust associated with some Wolf-Rayet stars. (author)

  3. CMB anisotropies at all orders: the non-linear Sachs-Wolfe formula

    OpenAIRE

    Roldan, Omar

    2017-01-01

    We obtain the non-linear generalization of the Sachs-Wolfe + integrated Sachs-Wolfe (ISW) formula describing the CMB temperature anisotropies. Our formula is valid at all orders in perturbation theory, is also valid in all gauges and includes scalar, vector and tensor modes. A direct consequence of our results is that the maps of the logarithmic temperature anisotropies are much cleaner than the usual CMB maps, because they automatically remove many secondary anisotropies. This can for instan...

  4. The challenge of wolf recovery: an ongoing dilemma for state managers

    Science.gov (United States)

    Mech, L. David

    2013-01-01

    “Dave, would you do another legal declaration on the wolf for us?” The weary voice on the phone belonged to Mike Jimenez, Northern Rocky Mountain Wolf Management and Science Coordinator for the U.S. Fish and Wildlife Service (FWS). He was calling from Wyoming to ask me to prepare a document to address a legal challenge to the FWS’s August 2012 delisting of the wolf (Canis lupus) in Wyoming, a highly controversial move. Mike’s tone reflected the reality that — as so many wildlife biologists know and live each day — wildlife management is mainly people management. This contention could not be truer for managing any wildlife species than for managing the wolf. Dubbed “the beast of waste and desolation” by Teddy Roosevelt (The Wilderness Hunter 1893/1900), wolves had been universally hated as prolific predators of valuable livestock and game. Around the turn of the 20th century, members of the U.S. Biological Survey and various state agents, ranchers, cowboys, and other frontiersmen poisoned and persecuted wolves, extirpating them from most of the contiguous United States (Young and Goldman 1944). By 1967, Minnesota and nearby Isle Royale National Park in Michigan held the only remaining wolves in the Lower 48 states, prompting the FWS to place the wolf on the Endangered Species List (established by the Endangered Species Preservation Act of 1966). The wolf then became the list’s poster species, and the timing was ideal: Silent Spring (Carson 1962) had just seeded and fertilized the environmental movement, which blossomed on Earth Day (April 22, 1970) into the environmental revolution. “Save the wolf!” became one of the movement’s rallying cries. And save the wolf we did.

  5. The Woman as Wolf (AT 409: Some Interpretations of a Very Estonian Folk Tale

    Directory of Open Access Journals (Sweden)

    Merili Metsvahi

    2013-12-01

    Full Text Available The article analyses tale type The Woman as Wolf, which is one of the most popular folk tales in the Estonian Folklore Archives and is represented there both in the form of a fairy tale and in the form of a legend. The vast majority of the versions of The Woman as Wolf were written down in the first part of the 20th century within Estonia and where recorded from Estonians. The article introduces the content of the tale, the origin of the first records from the early 19th century, and the dissemination area of the tale, which remains outside Western Europe: apart from the Estonian versions there are Sami, Karelian, Vepsian, Livonian, Latvian, Lithuanian, Russian, Ukrainian and Belarusian versions. While in almost all the Estonian versions the main protagonist is transformed into a wolf, in most of the versions written down in other areas and ethnic groups, another animal or bird replaces the wolf. The author is of the opinion that the Finnic area is central to the distribution of the folk tale The Woman as Wolf. The animal the woman is transformed into in the plot would not have been a wolf in earlier times. The article provides an explanation why the wolf is predominant in Estonian written sources. For that purpose the ways in which the wolf and werewolf were perceived in earlier Estonian folk belief are introduced. At the end of the article interpretation of the folk tale is provided. The author states that the plot and some of the motifs found in this folk tale reflect the difficulties women had in submitting to the norms and values of patriarchal order within their society.

  6. Fear or food - abundance of red fox in relation to occurrence of lynx and wolf.

    Science.gov (United States)

    Wikenros, Camilla; Aronsson, Malin; Liberg, Olof; Jarnemo, Anders; Hansson, Jessica; Wallgren, Märtha; Sand, Håkan; Bergström, Roger

    2017-08-22

    Apex predators may affect mesopredators through intraguild predation and/or supply of carrion from their prey, causing a trade-off between avoidance and attractiveness. We used wildlife triangle snow-tracking data to investigate the abundance of red fox (Vulpes vulpes) in relation to lynx (Lynx lynx) and wolf (Canis lupus) occurrence as well as land composition and vole (Microtus spp.) density. Data from the Swedish wolf-monitoring system and VHF/GPS-collared wolves were used to study the effect of wolf pack size and time since wolf territory establishment on fox abundance. Bottom-up processes were more influential than top-down effects as the proportion of arable land was the key indicator of fox abundance at the landscape level. At this spatial scale, there was no effect of wolf abundance on fox abundance, whereas lynx abundance had a positive effect. In contrast, at the wolf territory level there was a negative effect of wolves on fox abundance when including detailed information of pack size and time since territory establishment, whereas there was no effect of lynx abundance. This study shows that different apex predator species may affect mesopredator abundance in different ways and that the results may be dependent on the spatiotemporal scale and resolution of the data.

  7. The Difficulty of Saying "I": Translation and Censorship of Christa Wolf's Der geteilte Himmel

    Directory of Open Access Journals (Sweden)

    Katharina von Ankum

    1993-06-01

    Full Text Available The end of the GDR in 1990 triggered a vivid literary debate in Germany which focused on the interrelationship of politics, literature, and criticism. In this context, the work of Christa Wolf was attacked as primary example of self-censorship and collaboration. In my article, I argue that Wolf became the target of literary criticism largely because of her attempt to express female subjectivity in her texts. In my contrastive analysis of Der geteilte Himmel (1963 and its English translation (1965, I read Wolf's text as an initial attempt at a "socialist modernism." The continued value of this and subsequent works by Wolf lies in the accuracy and complexity with which she probes human behavior under adverse historical circumstances. Even a text like Der geteilte Himmel , which on a surface level reads merely like a political vote for socialism in the GDR as well as the writer's support for the division of Germany, eludes the binary opposition of East/West, them/us that critics have used to categorize Wolf's work. The hybrid nature of the text serves as example of Wolf's sincerity as a writer, evidence of her personal integrity, as well as her relentless commitment to a social alternative.

  8. Cinética de degradação de vitamina c em mangas 'palmer' minimamente processadas armazenadas em diferentes temperaturas Kinects of vitamin C degradation of 'palmer' mangoes (Mangifera indica L. stored at different temperatures

    Directory of Open Access Journals (Sweden)

    Juliana Alvarenga Alves

    2010-06-01

    Full Text Available Conduziu-se este trabalho, com o objetivo de utilizar parâmetros cinéticos para avaliar a degradação de vitamina C sobre a vida útil de mangas (Mangifera indica L. minimamente processadas e armazenadas em diferentes temperaturas. Mangas 'Palmer' foram lavadas em água corrente, sanificadas, descascadas, novamente sanificadas e fatiadas manualmente. O produto foi embalado em embalagem de polietileno com tampa e armazenado a 0ºC, 6ºC e 12ºC (85-90% UR. Para o acompanhamento da sua vida útil, a cada 2 dias foram feitas as seguintes análises: valores L* a* e b*, perda de massa, pH, firmeza, sólidos solúveis (SS, acidez titulável (AT e teor de vitamina C. As mangas minimamente processadas armazenadas à 0ºC e 6ºC apresentaram vida útil de 10 dias contra 4 dias das mangas armazenadas à 12ºC. Os dados obtidos por meio de regressão linear com os valores do logaritmo neperiano do teor de ácido ascórbico pelo tempo de armazenagem (dias mostram que a reação de degradação da vitamina C se ajusta ao modelo cinético de 1ª ordem. O Modelo de Arrhenius foi aplicado às velocidades de reação (k nas diferentes temperaturas estabelecendo energia de ativação (Ea de 34,32 kcal mol-1. A degradação de vitamina C foi mais lenta (t1/2 = 63,6dias; e k = 0,0109 dias-1 à 0ºC o que proporcionou maior retenção de seus teores (89% durante 10 dias de armazenamento. As frutas armazenadas à 12ºC apresentaram maior velocidade de degradação (k = 0,1729 dias-1 e, consequentemente, t1/2 inferior às demais temperaturas (apenas 4 dias.This work was used to evaluate the kinetic parameters for degradation of vitamin C on the shelf-life of minimally processed mangoes (Mangifera indica L. stored at different temperatures. 'Palmer' Mangos were washed in running water, sanitized, peeled, manually sliced and again sanitized. The product was packaged in polyethylene packaging with lid and stored at 0ºC, 6°C and 12 °C (85-90% RH. To monitor its

  9. Survival of adult female elk in yellowstone following wolf restoration

    Science.gov (United States)

    Evans, S.B.; Mech, L.D.; White, P.J.; Sargeant, G.A.

    2006-01-01

    Counts of northern Yellowstone elk (Cervus elaphus) in northwestern Wyoming and adjacent Montana, USA, have decreased at an average rate of 6-8% per year since wolves (Canis lupus) were reintroduced in 1995. Population growth rates of elk are typically sensitive to variations in adult female survival; populations that are stable or increasing exhibit high adult female survival. We used survival records for 85 radiocollared adult female elk 1-19 years old to estimate annual survival from March 2000 to February 2004. Weighted average annual survival rates were approximately 0.83 (95% CI = 0.77-0.89) for females 1-15 years old and 0.80 (95% CI = 0.73-0.86) for all females. Our estimates were much lower than the rate of 0.99 observed during 1969-1975 when fewer elk were harvested by hunters, wolves were not present, and other predators were less numerous. Of 33 documented deaths included in our analysis, we attributed 11 to hunter harvest, 14 to predation (10 wolf, 2 unknown, 1 cougar [Puma concolor], and 1 bear [Ursus sp.]), 6 to unknown causes, and 2 to winter-kill. Most deaths occurred from December through March. Estimates of cause-specific annual mortality rates were 0.09 (0.05-0.14) for all predators, 0.08 (0.04-0.13) for hunting, and 0.07 (0.03-0.11) for wolves specifically. Wolf-killed elk were typically older (median = 12 yr) than hunter-killed elk (median = 9 yr, P = 0.03). However, elk that winter outside the park where they were exposed to hunting were also younger (median = 7 yr) than elk that we did not observe outside the park (median = 9 yr, P wolves and hunters may reflect characteristics of elk exposed to various causes of mortality, as well as differences in susceptibility. Unless survival rates of adult females increase, elk numbers are likely to continue declining. Hunter harvest is the only cause of mortality that is amenable to management at the present time.

  10. Problems with the claim of ecotype and taxon status of the wolf in the Great Lakes region

    Science.gov (United States)

    Cronin, Matthew A.; Mech, L. David

    2009-01-01

    Koblmuller et al. (2009) analysed molecular genetic data of the wolf in the Great Lakes (GL) region of the USA and concluded that the animal was a unique ecotype of grey wolf and that genetic data supported the population as a discrete wolf taxon. However, some of the literature that the researchers used to support their position actually did not, and additional confusion arises from indefinite use of terminology. Herein, we discuss the problems with designation of a wolf population as a taxon or ecotype without proper definition and assessment of criteria.

  11. Helminth parasites in the endangered Ethiopian wolf, Canis simensis.

    Science.gov (United States)

    van Kesteren, F; Piggott, K J; Bengui, T; Kubri, S B; Mastin, A; Sillero-Zubiri, C; Paris, M; Millar, R P; Macdonald, D W; Shiferaw, F; Craig, P S

    2015-07-01

    Ethiopian wolves, Canis simensis, are an endangered carnivore endemic to the Ethiopian highlands. Although previous studies have focused on aspects of Ethiopian wolf biology, including diet, territoriality, reproduction and infectious diseases such as rabies, little is known of their helminth parasites. In the current study, faecal samples were collected from 94 wild Ethiopian wolves in the Bale Mountains of southern Ethiopia, between August 2008 and February 2010, and were screened for the presence of helminth eggs using a semi-quantitative volumetric dilution method with microscopy. We found that 66 of the 94 faecal samples (70.2%) contained eggs from at least one group of helminths, including Capillaria, Toxocara, Trichuris, ancylostomatids, Hymenolepis and taeniids. Eggs of Capillaria sp. were found most commonly, followed by Trichuris sp., ancylostomatid species and Toxocara species. Three samples contained Hymenolepis sp. eggs, which were likely artefacts from ingested prey species. Four samples contained taeniid eggs, one of which was copro-polymerase chain reaction (copro-PCR) and sequence positive for Echinococcus granulosus, suggesting a spillover from a domestic parasite cycle into this wildlife species. Associations between presence/absence of Capillaria, Toxocara and Trichuris eggs were found; and egg burdens of Toxocara and ancylostomatids were found to be associated with geographical location and sampling season.

  12. TRIGGERED STAR FORMATION SURROUNDING WOLF-RAYET STAR HD 211853

    Energy Technology Data Exchange (ETDEWEB)

    Liu Tie; Wu Yuefang; Zhang Huawei [Department of Astronomy, Peking University, 100871 Beijing (China); Qin Shengli, E-mail: liutiepku@gmail.com [I. Physikalisches Institut, Universitaet zu Koeln, Zuelpicher Str. 77, 50937 Koeln (Germany)

    2012-05-20

    The environment surrounding Wolf-Rayet (W-R) star HD 211853 is studied in molecular, infrared, as well as radio, and H I emission. The molecular ring consists of well-separated cores, which have a volume density of 10{sup 3} cm{sup -3} and kinematic temperature {approx}20 K. Most of the cores are under gravitational collapse due to external pressure from the surrounding ionized gas. From the spectral energy distribution modeling toward the young stellar objects, the sequential star formation is revealed on a large scale in space spreading from the W-R star to the molecular ring. A small-scale sequential star formation is revealed toward core 'A', which harbors a very young star cluster. Triggered star formations are thus suggested. The presence of the photodissociation region, the fragmentation of the molecular ring, the collapse of the cores, and the large-scale sequential star formation indicate that the 'collect and collapse' process functions in this region. The star-forming activities in core 'A' seem to be affected by the 'radiation-driven implosion' process.

  13. TRIGGERED STAR FORMATION SURROUNDING WOLF-RAYET STAR HD 211853

    International Nuclear Information System (INIS)

    Liu Tie; Wu Yuefang; Zhang Huawei; Qin Shengli

    2012-01-01

    The environment surrounding Wolf-Rayet (W-R) star HD 211853 is studied in molecular, infrared, as well as radio, and H I emission. The molecular ring consists of well-separated cores, which have a volume density of 10 3 cm –3 and kinematic temperature ∼20 K. Most of the cores are under gravitational collapse due to external pressure from the surrounding ionized gas. From the spectral energy distribution modeling toward the young stellar objects, the sequential star formation is revealed on a large scale in space spreading from the W-R star to the molecular ring. A small-scale sequential star formation is revealed toward core 'A', which harbors a very young star cluster. Triggered star formations are thus suggested. The presence of the photodissociation region, the fragmentation of the molecular ring, the collapse of the cores, and the large-scale sequential star formation indicate that the 'collect and collapse' process functions in this region. The star-forming activities in core 'A' seem to be affected by the 'radiation-driven implosion' process.

  14. Conditions for caribou persistence in the wolf-elk-caribou systems of the Canadian Rockies

    Directory of Open Access Journals (Sweden)

    Mark Hebblewhite

    2007-04-01

    Full Text Available Woodland caribou populations are considered threatened in Alberta and have declined in the Canadian Rocky Mountain National Parks of Banff and Jasper despite protection from factors causing caribou populations to decline outside of parks. Recent research emphasizes the importance of the numeric response of wolves to moose in moose-caribou-wolf systems to caribou persistence. Moose are rare in the Canadian Rockies, where the dominant ungulate prey for wolves is elk. Few studies have explored wolf-elk dynamics and none have examined implications for caribou. We used data collected in Banff to estimate the numeric response of wolves to elk from 1985 to 2005. Because no caribou kill-rate data exist for the Rockies, we explore the consequences of a range of hypothetical kill-rates based on kill-rates of alternate prey collected from 1985 to 2000 in Banff. We then multiplied the numeric response of wolves by the estimated caribou kill-rates to estimate the wolf predation response on caribou as a function of elk density. Caribou predation rates were inversely density dependent because wolf numbers depend on prey species besides caribou in multiple prey species systems. We then combined this simple wolf-elk-caribou model with observed demographic and population estimates for Banff and Jasper caribou from 2003-2004 and solved for the critical kill-rate thresholds above which caribou populations would decline. Using these critical kill-rate thresholds, Jasper caribou are likely to persist when wolf densities are below 2.1 - 4.3 wolves/1000km2 and/or when elk densities are below 0.015- 0.033 elk/km2. Thresholds for Banff caribou persistence are much lower because of inverse density dependence. Future research is needed on some of the necessary assumptions underlying our modeling including multi-prey wolf numeric responses, wolf kill-rates of caribou, caribou mortality by other predators, and spatial aspects of wolf-elk-caribou dynamics.

  15. But What About The Big Bad Wolf? Refashionig Red And The Wolf In The 21st Century

    Directory of Open Access Journals (Sweden)

    Şerban Andreea

    2015-11-01

    Full Text Available This paper aims to revisit three adaptations of Red Riding Hood fairy tales and explore some of the wolf’s reincarnations in order to see how realities change in time. It has generally been observed in the literature that in pop culture Red has undergone quite dramatic changes from the little ingénue to the mature seductress. But what has happened to the bad wolf? How is he imagined by the 21st century pop culture? How do his agency and power change? What (new message does he convey? To answer these questions, I shall look at three fairly recent advertisements that adapt the classic Little Red story for the screen: “Red Bull” energizer (February 2010, “Chanel no. 5” (featuring actress Estella Warren, late 1990s, 2007 and “B.U. Heartbeat” (featuring Tyson Kuteyi, 2008 perfumes. I will explore not only how such commercials reframe the dominant Western cultural pattern, but if they also undo the lessons both men and women have so far been forced to learn.

  16. Analysis of amplitude-phase disturbances of Wolf's numbers rhythmic structure

    International Nuclear Information System (INIS)

    Vojchishin, K.S.

    1978-01-01

    Statistical analysis of Wolf's number rhythmic structure has been carried out. Wolf's number time series is considered as a stochastic signal with irregular disturbances of rhythmic structure appearing because of random variability of single cycle parameters. A method and an algorythm for transforming the signal, to reduce all quasi-eleven-year cycles of mean-monthly Wolf's numbers to a signal mean duration, to find out and to eliminate rhythmic phase disturbances, are proposed. An estimate of the accuracy of the procedure is given. The results of calculations (on the mean duration range of cycles) of estimates of their mathematical expectation, dispersion and correlation function depending on time and its shift are given. The conclusion that Wolf's number time series may be treated as a sequence of stochastic cycles with randomly varying amplitude, duration and phase is grounded. A possibility for reducing the forecast of smoothed mean-monthly Wolf's numbers for one or more cycles ahead to the forecast of only three abovementioned parameters is pointed out

  17. Competition between apex predators? Brown bears decrease wolf kill rate on two continents.

    Science.gov (United States)

    Tallian, Aimee; Ordiz, Andrés; Metz, Matthew C; Milleret, Cyril; Wikenros, Camilla; Smith, Douglas W; Stahler, Daniel R; Kindberg, Jonas; MacNulty, Daniel R; Wabakken, Petter; Swenson, Jon E; Sand, Håkan

    2017-02-08

    Trophic interactions are a fundamental topic in ecology, but we know little about how competition between apex predators affects predation, the mechanism driving top-down forcing in ecosystems. We used long-term datasets from Scandinavia (Europe) and Yellowstone National Park (North America) to evaluate how grey wolf ( Canis lupus ) kill rate was affected by a sympatric apex predator, the brown bear ( Ursus arctos ). We used kill interval (i.e. the number of days between consecutive ungulate kills) as a proxy of kill rate. Although brown bears can monopolize wolf kills, we found no support in either study system for the common assumption that they cause wolves to kill more often. On the contrary, our results showed the opposite effect. In Scandinavia, wolf packs sympatric with brown bears killed less often than allopatric packs during both spring (after bear den emergence) and summer. Similarly, the presence of bears at wolf-killed ungulates was associated with wolves killing less often during summer in Yellowstone. The consistency in results between the two systems suggests that brown bear presence actually reduces wolf kill rate. Our results suggest that the influence of predation on lower trophic levels may depend on the composition of predator communities. © 2017 The Authors.

  18. Parasite species of the endangered Iberian wolf (Canis lupus signatus and a sympatric widespread carnivore

    Directory of Open Access Journals (Sweden)

    Ana Figueiredo

    2016-08-01

    Full Text Available Parasites have a profound impact on wildlife population dynamics. However, until some years ago, studies on the occurrence and prevalence of wildlife parasites were neglected comparatively with the studies on humans and domestic animals. In this study, we determined the parasite prevalence of two sympatric wild canids: the endangered Iberian wolf (Canis lupus signatus and the widespread red fox (Vulpes vulpes, in central Portugal. From November 2014 to July 2015, fresh fecal samples from both species were collected monthly in several transects distributed throughout the study area. All samples were submitted to several coprological techniques. In total, 6 helminth parasites (Crenosoma vulpis, Angiostrongylus vasorum, Toxocara canis, Trichuris vulpis, Ancylostomatidae, Toxascaris leonina, and a protozoa (Balantidium coli were identified based on size and morphology. The red fox was infected by seven different parasites while the Iberian wolf was infected by four. All parasites present in wolf were also present in the red fox. C. vulpis had the higher prevalence in red fox, while Ancylostomatidae were the most prevalent parasites in wolf. To our knowledge, this is the first study in this isolated subpopulation of the Iberian wolf. Our results show that both carnivores carry parasites that are of concern as they are pathogenic to humans and other wild and domestic animals. We suggest that surveillance programs must also include monitoring protocols of wildlife; particularly endangered species.

  19. Social-Natural Landscape Reorganised: Swedish Forest-edge Farmers and Wolf Recovery

    Directory of Open Access Journals (Sweden)

    Sjolander-Lindqvist Annelie

    2009-01-01

    Full Text Available The politics and the underlying reasons behind the recovery of the Scandinavian wolf population are increasingly contested. According to official policy, wolves should be guaranteed a place in the Swedish natural world. However, the conflict over whether Sweden should host a wolf population sets views on biodiversity and sustainable development against the perspective that local traditions and livelihoods are threatened by the return of wolves. These diverging environmental visions can be seen as competing interests and understandings of nature and wildlife. The desire of the state and nature conservation organisations to implement measures to provide conditions fostering wolf survival are counterbalanced by local action groups and community residents struggling to maintain conditions for conserving summer pastures, opportunities for hunting with sporting dogs, and other recreational activities such as mushroom- and berry-picking. Not only are these activities considered to have high natural and cultural value, the European Union (EU has stated that small-scale farming is important for maintaining the landscape and safeguarding the survival of values associated with ′agri-environmental′ habitats. The conflict between the interest groups is essentially about the access to and use of environmental resources. Squeezed between policies safeguarding wolf populations, preventing cruelty to animals and implementing activities required by the EU agricultural programme, farmers in areas with resident wolf populations have come to take part in processes that may reinforce rural identity.

  20. Affinity for music in Wolf-Hirschhorn syndrome: two case reports.

    Science.gov (United States)

    Arakawa, Chikako; Fujita, Yukihiko; Fuchigami, Tatsuo; Kawamura, Yuki; Ishii, Wakako; Endo, Ayumi; Kohira, Ryutaro; Takahashi, Shori

    2014-10-01

    Wolf-Hirschhorn syndrome is a congenital malformation syndrome resulting from deletion of the short arm of chromosome 4. Individuals with Wolf-Hirschhorn syndrome may have a "Greek warrior helmet" appearance, growth retardation, developmental delay, muscular hypotonia, epilepsy, and difficulty with language including verbal communication. An affinity for music has not previously been reported in these patients. We describe two patients with Wolf-Hirschhorn syndrome who both have a strong affinity for music. One patient is a 20-year-old woman who likes to listen to music all day and can hum many tunes. The other patient is a 9-year-old girl who is calmed by music and received music therapy, with subsequent improvement in her communication skills (eye contact, joint attention, and vocalizations to request music). Individuals with Wolf-Hirschhorn syndrome may have a strong affinity for music and may benefit from music therapy. Additional studies are needed to investigate the interest in music in individuals with Wolf-Hirschhorn syndrome. Copyright © 2014 Elsevier Inc. All rights reserved.

  1. Assessment of attachment behaviour to human caregivers in wolf pups (Canis lupus lupus).

    Science.gov (United States)

    Hall, Nathaniel J; Lord, Kathryn; Arnold, Anne-Marie K; Wynne, Clive D L; Udell, Monique A R

    2015-01-01

    Previous research suggested that 16-week old dog pups, but not wolf pups, show attachment behaviour to a human caregiver. Attachment to a caregiver in dog pups has been demonstrated by differential responding to a caregiver compared to a stranger in the Ainsworth Strange Situation Test. We show here that 3-7 week old wolf pups also show attachment-like behaviour to a human caregiver as measured by preferential proximity seeking, preferential contact, and preferential greeting to a human caregiver over a human stranger in a modified and counterbalanced version of the Ainsworth Strange Situation Test. In addition, our results show that preferential responding to a caregiver over a stranger is only apparent following brief isolation. In initial episodes, wolf pups show no differentiation between the caregiver and the stranger; however, following a 2-min separation, the pups show proximity seeking, more contact, and more greeting to the caregiver than the stranger. These results suggest intensive human socialization of a wolf can lead to attachment--like responding to a human caregiver during the first two months of a wolf pup's life. Published by Elsevier B.V.

  2. Impact of wolf (Canis lupus on animal husbandry in an Apennine province

    Directory of Open Access Journals (Sweden)

    Claudia Russo

    2014-07-01

    Full Text Available Predation has always been an important problem in extensive sheep farms, causing serious economic losses to the farmers. In the Province of Lucca, the presence of reproductive wolf packs has already been confirmed in natural reserves, but occasional signs of presence of the predator have been reported also in neighbouring areas. The present research has been carried out in this Province (between the Orecchiella Natural Reserve and the medium Serchio Valley, in order to obtain more complete information on the location of the wolf (with transects, wolfhowling and snow-tracking, and to verify the real impact and risk factors of predation on livestock (by means of on-farm surveys carried out in 42 semi-extensive farms in this area. The presence of wolf was confirmed in the study area with a minimum of four adult individuals and at least one pup: this pack lives around the peaks of the Apennines in the municipalities covered by this investigation. A growing conflict between the wolf and the sheep and goat farms was observed: since 2007 there have been 25 attacks and three farms can be considered subject to chronic predation. The major risk factors are high altitude, large flock size and lack of fences and of guardian dogs. An accurate knowledge of wolf presence and the identification of the farms mostly at risk can be useful for future planning of interventions aimed at prevention and support of farmers, in order to mitigate the conflict caused by predation.

  3. Lahtimuukimata tume energia / Dennis Overbye

    Index Scriptorium Estoniae

    Overbye, Dennis

    2008-01-01

    Salapärase tumeda energia avastamisest on möödas kümme aastat, ent teadmatus, millega on tegu ja kuidas seda üldse teada võiks saada, ajab teadlased endiselt meeleheitele. Lisaks joonis: Laiali kihutavad galaktikad

  4. Oligonephronia and Wolf-Hirschhorn syndrome: A further observation.

    Science.gov (United States)

    Gatto, Antonio; Ferrara, Pietro; Leoni, Chiara; Onesimo, Roberta; Zollino, Marcella; Emma, Francesco; Zampino, Giuseppe

    2018-02-01

    Wolf-Hirschhorn syndrome (WHS) is a rare chromosomal disorder caused by a partial deletion of chromosome 4 (4p16.3p16.2). We describe a case of a male 9 years old children with WHS proteinuria and hypertension. Laboratory data showed creatinine 1.05 mg/dl, GFR 65.9 ml/min/1.73 m 2 , cholesterol 280 mg/dl, triglyceride 125 mg/dl with electrolytes in the normal range. Urine collection showed protein 2.72 g/L with a urine protein/creatinine ratio (U P /U Cr ratio) of 4.2 and diuresis of 1,100 ml. Renal ultrasound showed reduced kidney dimensions with diffusely hyperechogenic cortex and poorly visualized pyramids. Renal biopsy showed oligonephronia with focal segmental glomerulosclerosis associated with initial tubulointerstitial sclerotic atrophy. The child began therapy with Angiotensin-converting enzyme inhibitors (ACE-inhibitors) to reduce proteinuria and progression of chronic kidney disease. In the literature the anomalies of number of glomeruli oligonephronia and oligomeganephronia (OMN) are described in two forms, one without any associated anomalies, sporadic, and solitary and the other with one or more anomalies. Our review of the literature shows that the pathogenesis of this anomaly is unknown but the role of chromosome 4 is very relevant. Many cases of OMN are associated with anomalies on this chromosome, in the literature cases series we observed this association in 14/48 cases (29.2%) and in 7 of these 14 cases with WHS. Our case and the review of literature demonstrate how periodic urinalysis and renal ultrasound monitoring is recommended in patients affected by WHS and the renal biopsy must be performed when there is the onset of proteinuria. © 2017 Wiley Periodicals, Inc.

  5. No trespassing: using a biofence to manipulate wolf movements

    Science.gov (United States)

    Ausband, David E.; Mitchell, Michael S.; Bassing, Sarah B.; White, Craig

    2013-01-01

    Context: Conserving large carnivores can be challenging because of conflicts with human land use and competition with humans for resources. Predation on domestic stock can have negative economic impacts particularly for owners of small herds, and tools for minimising carnivore depredation of livestock are needed. Canids use scent marking to establish territories and avoid intraspecific conflict. Exploiting scent-marking behaviour may provide a means for manipulating canid movements. Aims: We hypothesised that human-deployed scent marks (i.e. ‘biofence’) could be used to manipulate the movements of grey wolves (Canis lupus) in Idaho, USA. Methods: We deployed 65 km of biofence within three wolf-pack territories during summer 2010 and 2011 and used location data from satellite-collared wolves and sign surveys to assess the effectiveness of biofencing. Key results: Location data provided by satellite-collared wolves and sign surveys in 2010 showed little to no trespass of the biofence, even though the excluded areas were used by the packs in previous summers. We also opportunistically deployed a biofence in between a rendezvous site of a resident pack and a nearby sheep grazing allotment; the pack was not implicated in any depredations in summer 2010, even though they had killed sheep every year since 2006. Location data provided by satellite-collared wolves in summer 2011 showed that wolves did trespass biofences. Conclusions: Biofencing effectively manipulated the movements of wolves in the first year of our study, but not the second. Implications: Our work suggests that biofencing may be most limited by the apparent necessity to maintain a continuous presence once the biofence is established. The inherent labour and costs associated with such efforts may limit the usefulness of biofencing. Our work can be improved on through further testing that maintains biofencing over a longer timeframe (>3 months), samples several animals per treatment pack, and uses a

  6. 77 FR 55529 - Endangered and Threatened Wildlife and Plants; Removal of the Gray Wolf in Wyoming From the...

    Science.gov (United States)

    2012-09-10

    ... background information is also available online at http://www.fws.gov/mountain-prairie/species/mammals/wolf... allowing the Wyoming Game and Fish Commission (WGFC) to diminish Wyoming's Wolf Trophy Game Management Area... minimum levels. In early 2011, we began discussions with Wyoming seeking to develop a strategy to address...

  7. Predicting wolf (Canis lupus)-cattle (Bos Taurus) encounters and consequential effects on cattle resource selection patterns

    Science.gov (United States)

    The gray wolf population in Idaho has grown dramatically from the original 35 reintroduced individuals in 1995-1996 to 94 documented packs and a minimum population of 835 individuals in 2009. Wolf depredation on livestock has also increased dramatically with this population growth. Substantial spa...

  8. Killing and caching of an adult White-tailed deer, Odocoileus virginianus, by a single Gray Wolf, Canis lupus

    Science.gov (United States)

    Nelson, Michael E.

    2011-01-01

    A single Gray Wolf (Canis lupus) killed an adult male White-tailed Deer (Odocoileus virginianus) and cached the intact carcass in 76 cm of snow. The carcass was revisited and entirely consumed between four and seven days later. This is the first recorded observation of a Gray Wolf caching an entire adult deer.

  9. Comparación de la técnica de Dennis con los hallazgos hepáticos post - mortem para el diagnóstico de la fasciolosis bovina

    Directory of Open Access Journals (Sweden)

    Alejandra Alvarez

    2009-10-01

    Full Text Available El presente estudio hace una comparación entre los resultados de la técnica de Dennis para diagnóstico de Fasciolosis bovina, frente a hallazgos post mortem, en hígados de bovinos faenados en la empresa Matadero de Tunja. Es un estudio experimental descriptivo, por cuanto expone los hallazgos en matadero frente a los arrojados por el método de Dennis. La población total de bovinos adultos fue de 2800, de los cuales se tomó una muestra de 139 animales. El muestreo se llevó a cabo durante el mes de febrero del año 2009. Los resultados indican que la técnica de Dennis no es lo suficientemente sensible para el diagnóstico de Fasciola hepática, por lo que se debe evaluar su uso rutinario.La técnica coprológica se fundamenta en el principio de sedimentación delos huevos, por lo tanto depende la salida de éstos en la materia fecal, lo que la hace poco efectiva para la detección del parásito. La razón de este estudiose sustenta en que la enfermedad se encuentra ampliamente distribuida en la región y en el país. Su diagnóstico se realiza rutinariamente mediante técnicas coprológicas aplicadas a los animales en los que se sospecha la enfermedad.

  10. Yellowstone wolf (Canis lupus) denisty predicted by elk (Cervus elaphus) biomass

    Science.gov (United States)

    Mech, L. David; Barber-Meyer, Shannon

    2015-01-01

    The Northern Range (NR) of Yellowstone National Park (YNP) hosts a higher prey biomass density in the form of elk (Cervus elaphus L., 1758) than any other system of gray wolves (Canis lupus L., 1758) and prey reported. Therefore, it is important to determine whether that wolf–prey system fits a long-standing model relating wolf density to prey biomass. Using data from 2005 to 2012 after elk population fluctuations dampened 10 years subsequent to wolf reintroduction, we found that NR prey biomass predicted wolf density. This finding and the trajectory of the regression extend the validity of the model to prey densities 19% higher than previous data and suggest that the model would apply to wolf–prey systems of even higher prey biomass.

  11. Alternative model for the atmospheres of Wolf-Rayet and O stars

    International Nuclear Information System (INIS)

    Underhill, A.B.

    1983-01-01

    It is noted that postulating dense spherically symmetric outflow in order to account for the observed radio fluxes from Wolf-Rayet stars requires that much more momentum must be deposited in the wind of a Wolf-Rayet star than is available from the radiation field of the star, and it is shown that the deduced massive winds become opaque in visible wavelengths at stellar radii where the velocity of outflow is several hundred km s - 1 . To attain such a state of motion in the wind requires the action of a strong, unknown source of outward directed momentum in optically thick layers of the star. This is an unreasonable demand. An alternative model for the mantle of a Wolf-Rayet star (the part of the atmosphere in which nonradiative energy and momentum are deposited) is proposed and shown to be feasible

  12. Osteometrical and CT examination of the Japanese wolf [Canis hodophilax] skull

    International Nuclear Information System (INIS)

    Endo, H.; Obara, I.; Yoshida, T.; Kurohmaru, M.; Hayshi, Y.; Suzuki, N.

    1997-01-01

    The skulls of Japanese wolf (Canis hodophilax) were osteometrically examined and compared with those of Akita-Inu. The skull total length was not statistically different between two species. However, significant differences were demonstrated between two species in some ratios concerning the frontal bone. CT examination was carried out in the Japanese wolf skull. The data indicated that the frontal sinus is not be largely developed and compressed in the dorso-ventral direction in parasagittal area. The narrow frontal sinus fitted to external shape of the frontal bone. The cribriform plate had a well-developed complicated structure in a caudal part of the ethmoid bone. These data will be useful to examine the respiratory function and the olfactory sense in the Japanese wolf

  13. Euroopa kultuuripealinnadest / Robert Palmer

    Index Scriptorium Estoniae

    Palmer, Robert

    2005-01-01

    Ilmunud ka: International cultural marketing conference : November 3-4, 2005, Tartu : a collection of speeches. Kultuuripealinna tiitli tähendusest, sellega kaasnevatest võimalustest ja kuludest, nõuandeid kultuuripealinnaks kandideerijaile. Tabel. Diagrammid. Vt. ka lk. 25-28: Timonen, Pekka. Helsingi - Euroopa kultuuripealinn 2000. aastal

  14. First confirmation and characterization of target and non-target site resistance to glyphosate in Palmer amaranth (Amaranthus palmeri) from Mexico.

    Science.gov (United States)

    Dominguez-Valenzuela, Jose Alfredo; Gherekhloo, Javid; Fernández-Moreno, Pablo Tomás; Cruz-Hipolito, Hugo Enrique; Alcántara-de la Cruz, Ricardo; Sánchez-González, Eduardo; De Prado, Rafael

    2017-06-01

    Following the introduction of glyphosate-resistant (GR)-cotton crops in Mexico, farmers have relied upon glyphosate as being the only herbicide for in-season weed control. Continuous use of glyphosate within the same year and over multiple successive years has resulted in the selection of glyphosate resistance in Palmer amaranth (Amarantus palmeri). Dose-response assays confirmed resistance in seven different accessions. The resistance ratio based on GR 50 values (50% growth reduction) varied between 12 and 83. At 1000 μM glyphosate, shikimic acid accumulation in the S-accession was 30- to 2-fold higher at compared to R-accessions. At 96 h after treatment, 35-44% and 61% of applied 14 C-glyphosate was taken up by leaves of plants from R- and S-accessions, respectively. At this time, a significantly higher proportion of the glyphosate absorbed remained in the treated leaf of R-plants (55-69%) compared to S-plants (36%). Glyphosate metabolism was low and did not differ between resistant and susceptible plants. Glyphosate was differentially metabolized to AMPA and glyoxylate in plants of R- and S-accessions, although it was low in both accessions (glyphosate collected from GR-cotton crops from Mexico. This is the first study demonstrating glyphosate-resistance in Palmer amaranth from Mexico. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

  15. Intravitreal injection analysis at the Bascom Palmer Eye Institute: evaluation of clinical indications for the treatment and incidence rates of endophthalmitis

    Directory of Open Access Journals (Sweden)

    Ludimila L Cavalcante

    2010-05-01

    Full Text Available Ludimila L Cavalcante, Milena L Cavalcante, Timothy G Murray, Michael M Vigoda, Yolanda Piña, Christina L Decatur, R Prince Davis, Lisa C Olmos, Amy C Schefler, Michael B Parrott, Kyle J Alliman, Harry W Flynn, Andrew A MoshfeghiBascom Palmer Eye Institute, Department of Ophthalmology, University of Miami Miller School of Medicine, Miami, FL, USAObjective: To report the incidence of endophthalmitis, in addition to its clinical and microbiological aspects, after intravitreal injection of vascular-targeting agents.Methods: A retrospective review of a consecutive series of 10,142 intravitreal injections of vascular targeting agents (bevacizumab, ranibizumab, triamcinolone acetonide, and preservative-free triamcinolone acetonide between June 1, 2007 and January 31, 2010, performed by a single service (TGM at the Bascom Palmer Eye Institute.Results: One case of clinically-suspected endophthalmitis was identified out of a total of 10,142 injections (0.009%, presenting within three days of injection of bevacizumab. The case was culture-positive for Staphylococcus epidermidis. Final visual acuity was 20/40 after pars plana vitrectomy surgery.Conclusions: In this series, the incidence of culture-positive endophthalmitis after intravitreal injection of vascular agents in an outpatient setting was very low. We believe that following a standardized injection protocol, adherence to sterile techniques and proper patient follow-up are determining factors for low incidence rates.Keywords: endophthalmitis, intravitreal injections, vascular targeting agents 

  16. Using Spatial, Economic, and Ecological Opinion Data to Inform Gray Wolf Conservation

    Science.gov (United States)

    Berry, Meredith S.; Nickerson, Norma P.; Metcalf, Elizabeth Covelli

    2018-01-01

    Public opinion can be an influential factor in wildlife management decisions. Evaluating public opinions can help legitimize, or delegitimize, management and facilitate long-term conservation goals. This is especially true for the controversial issues surrounding the management of predators. We surveyed Montana, USA, residents during summer of 2013 to measure public opinion regarding economic and ecological impacts of the gray wolf (Canis lupus), and current management of this species. Although opinions were polarized in some areas, a greater percentage of Montanans think that wolves negatively affect the economy, but impact tourism (which contributes to the economy) positively. These differences may reflect the belief that rancher economic losses from wolf predation of cattle is greater than overall tourism gains related to wolves (e.g., wolf-watching), in addition to the perception of wolves negatively affecting big game (e.g., elk [Cervus canadensis]). Results also show that a slightly greater percentage of Montanans feel that wolves positively rather than negatively affect the ecosystem. Regarding specific practices, more Montanans than not have a positive opinion of maintaining wolves on the landscape and also support hunting of wolves. More Montanans hold negative rather than positive opinions, however, regarding wolf trapping. This result was most evident in western Montana as assessed by a spatial distribution of opinions by county and has implications for current wolf management and nontarget species. Results of ordinal regression analyses revealed that big game hunters, males, and those who held negative opinions of the effect of wolves on the Montana ecosystem and economy were significantly more likely to support both hunting and trapping practices. Living in western Montana predicted positive opinions of hunting, but alternatively, negative opinions of trapping. These results provide an understanding of public opinion of wolf management by county as

  17. Using Spatial, Economic, and Ecological Opinion Data to Inform Gray Wolf Conservation.

    Science.gov (United States)

    Berry, Meredith S; Nickerson, Norma P; Metcalf, Elizabeth Covelli

    2016-09-01

    Public opinion can be an influential factor in wildlife management decisions. Evaluating public opinions can help legitimize, or delegitimize, management and facilitate long-term conservation goals. This is especially true for the controversial issues surrounding the management of predators. We surveyed Montana, USA, residents during summer of 2013 to measure public opinion regarding economic and ecological impacts of the gray wolf ( Canis lupus ), and current management of this species. Although opinions were polarized in some areas, a greater percentage of Montanans think that wolves negatively affect the economy, but impact tourism (which contributes to the economy) positively. These differences may reflect the belief that rancher economic losses from wolf predation of cattle is greater than overall tourism gains related to wolves (e.g., wolf-watching), in addition to the perception of wolves negatively affecting big game (e.g., elk [ Cervus canadensis ]). Results also show that a slightly greater percentage of Montanans feel that wolves positively rather than negatively affect the ecosystem. Regarding specific practices, more Montanans than not have a positive opinion of maintaining wolves on the landscape and also support hunting of wolves. More Montanans hold negative rather than positive opinions, however, regarding wolf trapping. This result was most evident in western Montana as assessed by a spatial distribution of opinions by county and has implications for current wolf management and nontarget species. Results of ordinal regression analyses revealed that big game hunters, males, and those who held negative opinions of the effect of wolves on the Montana ecosystem and economy were significantly more likely to support both hunting and trapping practices. Living in western Montana predicted positive opinions of hunting, but alternatively, negative opinions of trapping. These results provide an understanding of public opinion of wolf management by county as

  18. Can occupancy-abundance models be used to monitor wolf abundance?

    Directory of Open Access Journals (Sweden)

    M Cecilia Latham

    Full Text Available Estimating the abundance of wild carnivores is of foremost importance for conservation and management. However, given their elusive habits, direct observations of these animals are difficult to obtain, so abundance is more commonly estimated from sign surveys or radio-marked individuals. These methods can be costly and difficult, particularly in large areas with heavy forest cover. As an alternative, recent research has suggested that wolf abundance can be estimated from occupancy-abundance curves derived from "virtual" surveys of simulated wolf track networks. Although potentially more cost-effective, the utility of this approach hinges on its robustness to violations of its assumptions. We assessed the sensitivity of the occupancy-abundance approach to four assumptions: variation in wolf movement rates, changes in pack cohesion, presence of lone wolves, and size of survey units. Our simulations showed that occupancy rates and wolf pack abundances were biased high if track surveys were conducted when wolves made long compared to short movements, wolf packs were moving as multiple hunting units as opposed to a cohesive pack, and lone wolves were moving throughout the surveyed landscape. We also found that larger survey units (400 and 576 km2 were more robust to changes in these factors than smaller survey units (36 and 144 km2. However, occupancy rates derived from large survey units rapidly reached an asymptote at 100% occupancy, suggesting that these large units are inappropriate for areas with moderate to high wolf densities (>15 wolves/1,000 km2. Virtually-derived occupancy-abundance relationships can be a useful method for monitoring wolves and other elusive wildlife if applied within certain constraints, in particular biological knowledge of the surveyed species needs to be incorporated into the design of the occupancy surveys. Further, we suggest that the applicability of this method could be extended by directly incorporating some of its

  19. Growth rates and variances of unexploited wolf populations in dynamic equilibria

    Science.gov (United States)

    Mech, L. David; Fieberg, John

    2015-01-01

    Several states have begun harvesting gray wolves (Canis lupus), and these states and various European countries are closely monitoring their wolf populations. To provide appropriate perspective for determining unusual or extreme fluctuations in their managed wolf populations, we analyzed natural, long-term, wolf-population-density trajectories totaling 130 years of data from 3 areas: Isle Royale National Park in Lake Superior, Michigan, USA; the east-central Superior National Forest in northeastern Minnesota, USA; and Denali National Park, Alaska, USA. Ratios between minimum and maximum annual sizes for 2 mainland populations (n = 28 and 46 yr) varied from 2.5–2.8, whereas for Isle Royale (n = 56 yr), the ratio was 6.3. The interquartile range (25th percentile, 75th percentile) for annual growth rates, Nt+1/Nt, was (0.88, 1.14), (0.92, 1.11), and (0.86, 1.12) for Denali, Superior National Forest, and Isle Royale respectively. We fit a density-independent model and a Ricker model to each time series, and in both cases we considered the potential for observation error. Mean growth rates from the density-independent model were close to 0 for all 3 populations, with 95% credible intervals including 0. We view the estimated model parameters, including those describing annual variability or process variance, as providing useful summaries of the trajectories of these populations. The estimates of these natural wolf population parameters can serve as benchmarks for comparison with those of recovering wolf populations. Because our study populations were all from circumscribed areas, fluctuations in them represent fluctuations in densities (i.e., changes in numbers are not confounded by changes in occupied area as would be the case with populations expanding their range, as are wolf populations in many states).

  20. Emission - line theoretical profiles for Wolf- Rayet stars with low-mass companions

    International Nuclear Information System (INIS)

    Antokhin, I.I.

    1986-01-01

    Profiles of the resonant line λ 765 A and the subordinate line λ 4058 of N4 have been calculated for a binary system medel consisting of the Wolf-Rayet star and the low-mass companion (possibly, a relativistic object) by means of Sobolev approximation. The equations of statistical equilibrium have been solved for the first 32 levels of N4. Two cases have been considered: 1) detached zone of N5 surrounding the Wolf-Rayet star and the companion; 2) common zone of N5. The criteria for detection of presence of a companion in line profile observations have been formulated

  1. SS433: the second Wolf-Rayet X-ray binary ?

    OpenAIRE

    Fuchs, Yael; Koch-Miramond, Lydie; Abraham, Peter

    2002-01-01

    We present mid-infrared spectrophotometric observations of SS433 with ISOPHOT. The HeI+HeII lines in both spectra of SS433 and of the Wolf-Rayet star WR147, a wind-colliding WN8+BO5 binary system, closely match. The 2.5-12 micron continuum radiation is due to an expanding wind free-free emission in an intermediate case between optically thick and optically thin regimes. The inferred mass loss rate evaluation gives ~10^{-4} Msun/yr. Our results are consistent with a Wolf-Rayet-like companion t...

  2. On x radiation of double systems containing Wolf-Rayet type stars

    International Nuclear Information System (INIS)

    Prilutskij, O.F.; Usov, V.V.

    1976-01-01

    It is shown that the close binary systems must be rather intensive sources of X radiation one or both components of which are young massive stars with strong outflow of matter from them (Wolf-Rayet type stars and OB supergiants). X-radiation of such binary systems is stimulated by gas heating behind the front of shock waves formed as a result of collision of gas outflowing from one component either with the second star surface or with its magnetosphere or with gas outflowing from the second star. The most possible candidates of X-ray sources among double Wolf-Rayet stars are γ 2 Vel and V 444 Cyg

  3. A Conceptual Analysis of Mass Loss and Frequency Redistribution in Wolf-Rayet Winds

    OpenAIRE

    Onifer, A. J.; Gayley, K. G.

    2007-01-01

    To better understand Wolf-Rayet stars as progenitors of gamma-ray bursts, an understanding of the effect metallicity has on Wolf-Rayet mass loss is needed. Using simple analytic models, we study the Mdot - Z relation of a WN star and compare the results to similar models. We find that Mdot roughly follows a power law in Z with index 0.88 from -2.5 < log Z/Z_sun < -1 and appears to flatten by log Z/Z_sun ~ -0.5.

  4. Treatment of fibrosarcoma in a maned wolf (Chrysocyon brachyurus) by rostral maxillectomy.

    Science.gov (United States)

    McNulty, E E; Gilson, S D; Houser, B S; Ouse, A

    2000-09-01

    A 12-yr-old captive intact male maned wolf (Chrysocyon brachyurus) was diagnosed with a fibrosarcoma of the incisive bones. The mass was excised by rostral maxillectomy, and the wolf remained normal and on display with good function and cosmetics for 7 mo. Subsequently, it became weak, ataxic, and dyspneic and was euthanatized. At necropsy, there was a small regrowth of the maxillary tumor, a metastatic mediastinal mass, and multiple metastatic lung masses, suggesting that oral fibrosarcoma in maned wolves behaves similarly to oral fibrosarcoma in domestic canines. Aggressive surgical treatment of oral fibrosarcoma in this species can achieve good functional and cosmetic results.

  5. Spotted black snake (Pseudechis guttatus) envenomation in a maned wolf (Chrysocyon brachyurus).

    Science.gov (United States)

    Portas, Timothy J; Montali, Richard J

    2007-09-01

    Envenomation by a spotted black snake (Pseudechis guttatus), following multiple bites on the buccal mucosa of a captive maned wolf (Chrysocyon brachyurus), caused the animal's collapse, hemolysis, rhabdomyolysis, local tissue necrosis, hepatic and renal failure, and subsequent death. The wolf died despite intensive supportive care including antivenom administration, fluid support, and a blood transfusion. Gross necropsy findings included myocardial and intestinal hemorrhage, pulmonary congestion, hepatomegaly, and splenomegaly. Microscopic examination of formalin-fixed tissues demonstrated pulmonary and abdominal visceral hemorrhage, acute nephrosis with casts, multifocal hepatic necrosis, and splenic congestion.

  6. Gastrointestinal parasites of maned wolf (Chrysocyon brachyurus, Illiger 1815) in a suburban area in southeastern Brazil.

    Science.gov (United States)

    Massara, R L; Paschoal, A M O; Chiarello, A G

    2015-08-01

    We examined 42 maned wolf scats in an unprotected and disturbed area of Cerrado in southeastern Brazil. We identified six helminth endoparasite taxa, being Phylum Acantocephala and Family Trichuridae the most prevalent. The high prevalence of the Family Ancylostomatidae indicates a possible transmission via domestic dogs, which are abundant in the study area. Nevertheless, our results indicate that the endoparasite species found are not different from those observed in protected or least disturbed areas, suggesting a high resilience of maned wolf and their parasites to human impacts, or a common scenario of disease transmission from domestic dogs to wild canid whether in protected or unprotected areas of southeastern Brazil.

  7. The wolf reference genome sequence (Canis lupus lupus) and its implications for Canis spp. population genomics

    DEFF Research Database (Denmark)

    Gopalakrishnan, Shyam; Samaniego Castruita, Jose Alfredo; Sinding, Mikkel Holger Strander

    2017-01-01

    Background An increasing number of studies are addressing the evolutionary genomics of dog domestication, principally through resequencing dog, wolf and related canid genomes. There is, however, only one de novo assembled canid genome currently available against which to map such data - that of a......Background An increasing number of studies are addressing the evolutionary genomics of dog domestication, principally through resequencing dog, wolf and related canid genomes. There is, however, only one de novo assembled canid genome currently available against which to map such data...

  8. Finding the Wolves in Sheeps Clothing: Ways to Distinguish and Deter Lone-Wolf Terrorists

    Science.gov (United States)

    2015-03-01

    Mark Hamm, “Lone-wolf Terrorism in America: Forging a New Way of Looking at an Old Problem,” YouTube video, 7:32, posted by the National Institute...that factors that influence most lone-wolf terrorists include, “to varying degrees and in variable combinations: personal aversion or depression ...Russia.”97 Also discovered after the bombings, “Tamerlan had a YouTube account that he used to post and watch violent Islamic extremist videos starting

  9. Fear or food ? abundance of red fox in relation to occurrence of lynx and wolf

    OpenAIRE

    Wikenros, Camilla; Aronsson, Malin; Liberg, Olof; Jarnemo, Anders; Hansson, Jessica; Wallgren, M?rtha; Sand, H?kan; Bergstr?m, Roger

    2017-01-01

    Apex predators may affect mesopredators through intraguild predation and/or supply of carrion from their prey, causing a trade-off between avoidance and attractiveness. We used wildlife triangle snow-tracking data to investigate the abundance of red fox (Vulpes vulpes) in relation to lynx (Lynx lynx) and wolf (Canis lupus) occurrence as well as land composition and vole (Microtus spp.)?density. Data from the Swedish wolf-monitoring system and VHF/GPS-collared wolves were used to study the eff...

  10. Relationship between snow depth and gray wolf predation on white-tailed deer

    Science.gov (United States)

    Nelson, M.E.; Mech, L.D.

    1986-01-01

    Survival of 203 yearling and adult white-tailed deer (Odocoileus virginianus) was monitored for 23,441 deer days from January through April 1975-85 in northeastern Minnesota. Gray wolf (Canis lupus) predation was the primary mortality cause, and from year to year during this period, the mean predation rate ranged from 0.00 to 0.29. The sum of weekly snow depths/month explained 51% of the variation in annual wolf predation rate, with the highest predation during the deepest snow.

  11. Hybrid Algorithm of Particle Swarm Optimization and Grey Wolf Optimizer for Improving Convergence Performance

    Directory of Open Access Journals (Sweden)

    Narinder Singh

    2017-01-01

    Full Text Available A newly hybrid nature inspired algorithm called HPSOGWO is presented with the combination of Particle Swarm Optimization (PSO and Grey Wolf Optimizer (GWO. The main idea is to improve the ability of exploitation in Particle Swarm Optimization with the ability of exploration in Grey Wolf Optimizer to produce both variants’ strength. Some unimodal, multimodal, and fixed-dimension multimodal test functions are used to check the solution quality and performance of HPSOGWO variant. The numerical and statistical solutions show that the hybrid variant outperforms significantly the PSO and GWO variants in terms of solution quality, solution stability, convergence speed, and ability to find the global optimum.

  12. New hybrid conjugate gradient methods with the generalized Wolfe line search.

    Science.gov (United States)

    Xu, Xiao; Kong, Fan-Yu

    2016-01-01

    The conjugate gradient method was an efficient technique for solving the unconstrained optimization problem. In this paper, we made a linear combination with parameters β k of the DY method and the HS method, and putted forward the hybrid method of DY and HS. We also proposed the hybrid of FR and PRP by the same mean. Additionally, to present the two hybrid methods, we promoted the Wolfe line search respectively to compute the step size α k of the two hybrid methods. With the new Wolfe line search, the two hybrid methods had descent property and global convergence property of the two hybrid methods that can also be proved.

  13. Ecosystem scale declines in elk recruitment and population growth with wolf colonization: a before-after-control-impact approach.

    Science.gov (United States)

    Christianson, David; Creel, Scott

    2014-01-01

    The reintroduction of wolves (Canis lupus) to Yellowstone provided the unusual opportunity for a quasi-experimental test of the effects of wolf predation on their primary prey (elk--Cervus elaphus) in a system where top-down, bottom-up, and abiotic forces on prey population dynamics were closely and consistently monitored before and after reintroduction. Here, we examined data from 33 years for 12 elk population segments spread across southwestern Montana and northwestern Wyoming in a large scale before-after-control-impact analysis of the effects of wolves on elk recruitment and population dynamics. Recruitment, as measured by the midwinter juvenile∶female ratio, was a strong determinant of elk dynamics, and declined by 35% in elk herds colonized by wolves as annual population growth shifted from increasing to decreasing. Negative effects of population density and winter severity on recruitment, long recognized as important for elk dynamics, were detected in uncolonized elk herds and in wolf-colonized elk herds prior to wolf colonization, but not after wolf colonization. Growing season precipitation and harvest had no detectable effect on recruitment in either wolf treatment or colonization period, although harvest rates of juveniles∶females declined by 37% in wolf-colonized herds. Even if it is assumed that mortality due to predation is completely additive, liberal estimates of wolf predation rates on juvenile elk could explain no more than 52% of the total decline in juvenile∶female ratios in wolf-colonized herds, after accounting for the effects of other limiting factors. Collectively, these long-term, large-scale patterns align well with prior studies that have reported substantial decrease in elk numbers immediately after wolf recolonization, relatively weak additive effects of direct wolf predation on elk survival, and decreased reproduction and recruitment with exposure to predation risk from wolves.

  14. Ecosystem scale declines in elk recruitment and population growth with wolf colonization: a before-after-control-impact approach.

    Directory of Open Access Journals (Sweden)

    David Christianson

    Full Text Available The reintroduction of wolves (Canis lupus to Yellowstone provided the unusual opportunity for a quasi-experimental test of the effects of wolf predation on their primary prey (elk--Cervus elaphus in a system where top-down, bottom-up, and abiotic forces on prey population dynamics were closely and consistently monitored before and after reintroduction. Here, we examined data from 33 years for 12 elk population segments spread across southwestern Montana and northwestern Wyoming in a large scale before-after-control-impact analysis of the effects of wolves on elk recruitment and population dynamics. Recruitment, as measured by the midwinter juvenile∶female ratio, was a strong determinant of elk dynamics, and declined by 35% in elk herds colonized by wolves as annual population growth shifted from increasing to decreasing. Negative effects of population density and winter severity on recruitment, long recognized as important for elk dynamics, were detected in uncolonized elk herds and in wolf-colonized elk herds prior to wolf colonization, but not after wolf colonization. Growing season precipitation and harvest had no detectable effect on recruitment in either wolf treatment or colonization period, although harvest rates of juveniles∶females declined by 37% in wolf-colonized herds. Even if it is assumed that mortality due to predation is completely additive, liberal estimates of wolf predation rates on juvenile elk could explain no more than 52% of the total decline in juvenile∶female ratios in wolf-colonized herds, after accounting for the effects of other limiting factors. Collectively, these long-term, large-scale patterns align well with prior studies that have reported substantial decrease in elk numbers immediately after wolf recolonization, relatively weak additive effects of direct wolf predation on elk survival, and decreased reproduction and recruitment with exposure to predation risk from wolves.

  15. PREFACE: Celebrating 20 years of Journal of Physics: Condensed Matter—in honour of Richard Palmer Celebrating 20 years of Journal of Physics: Condensed Matter—in honour of Richard Palmer

    Science.gov (United States)

    Ferry, David; Dowben, Peter; Inglesfield, John

    2009-11-01

    This year marks the 20th anniversary of the launch of Journal of Physics: Condensed Matter in 1989. The journal was formed from the merger of Journal of Physics C: Solid State Physics and Journal of Physics F: Metal Physics which had separated in 1971. In the 20 years since its launch, Journal of Physics: Condensed Matter has more than doubled in size, while raising standards. Indeed, Journal of Physics: Condensed Matter has become one of the leading scientific journals for our field. This could not have occurred without great leadership at the top. No one has been more responsible for this growth in both size and quality than our Senior Publisher, Richard Palmer. Richard first started work at IOP in March 1971 as an Editorial Assistant with J. Phys. B After a few months, he transferred to J. Phys.C The following year, the Assistant Editor of J. Phys. C, Malcolm Haines, left suddenly in order to work on his family vineyard in France, and Richard stepped into the breach. In those days, external editors had a much more hands-on role in IOP Publishing and he had to travel to Harwell to be interviewed by Alan Lidiard, the Honorary Editor of J. Phys. C, before being given the job of Assistant Editor permanently. Since J. Phys. C and J. Phys. F re-merged to form Journal of Physics: Condensed Matter, Richard gradually shed his other journal responsibilities, except for Reports on Progress in Physics, to build up Journal of Physics: Condensed Matter. He has worked closely with four Editors-in-Chief of J. Phys. C and five of Journal of Physics: Condensed Matter. When Richard announced his retirement this past winter, we met it with a great deal of both happiness and sadness. Of course, we are happy that he is going to be allowed to enjoy his retirement, but we remain very sad to lose such a valuable member of our team, especially the one who had provided the heart and soul of the journal over its 20 years. We will be able to rely upon the team which Richard ably trained as

  16. Planck 2015 results: XXI. The integrated Sachs-Wolfe effect

    International Nuclear Information System (INIS)

    Ade, P. A. R.; Aghanim, N.; Arnaud, M.; Ashdown, M.; Aumont, J.

    2016-01-01

    Here, this paper presents a study of the integrated Sachs-Wolfe (ISW) effect from the Planck 2015 temperature and polarization data release. This secondary cosmic microwave background (CMB) anisotropy caused by the large-scale time-evolving gravitational potential is probed from different perspectives. The CMB is cross-correlated with different large-scale structure (LSS) tracers: radio sources from the NVSS catalogue; galaxies from the optical SDSS and the infrared WISE surveys; and the Planck 2015 convergence lensing map. The joint cross-correlation of the CMB with the tracers yields a detection at 4σ where most of the signal-to-noise is due to the Planck lensing and the NVSS radio catalogue. In fact, the ISW effect is detected from the Planck data only at ≈3σ (through the ISW-lensing bispectrum), which is similar to the detection level achieved by combining the cross-correlation signal coming from all the galaxy catalogues mentioned above. We study the ability of the ISW effect to place constraints on the dark-energy parameters; in particular, we show that Ω Λ is detected at more than 3σ. This cross-correlation analysis is performed only with the Planck temperature data, since the polarization scales available in the 2015 release do not permit significant improvement of the CMB-LSS cross-correlation detectability. Nevertheless, the Planck polarization data are used to study the anomalously large ISW signal previously reported through the aperture photometry on stacked CMB features at the locations of known superclusters and supervoids, which is in conflict with ΛCDM expectations. We find that the current Planck polarization data do not exclude that this signal could be caused by the ISW effect. In addition, the stacking of the Planck lensing map on the locations of superstructures exhibits a positive cross-correlation with these large-scale structures. Finally, we have improved our previous reconstruction of the ISW temperature fluctuations by combining

  17. 78 FR 20613 - Ochoco National Forest, Paulina Ranger District; Oregon; Wolf Creek Vegetation and Fuels...

    Science.gov (United States)

    2013-04-05

    ... 2012 and documented in the Wolf Creek Watershed Analysis. The watershed analysis determined that... includes National Forest system lands within the Lower Beavercreek watershed. The alternatives that will be... analysis and decision making process so interested and affected people may participate and contribute to...

  18. Observations of mass loss from OB and Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Barlow, M.J.

    1982-01-01

    In this review, three observationally accessible parameters of the winds of OB and Wolf-Rayet stars are discussed: (1) Terminal velocities, (2) Velocity laws, (3) Mass loss rates. In addition, some discussion of the ionisation structure of the winds is included. In general, only the most recent results for OB stars are mentioned. (Auth.)

  19. The infrared emission features in the spectrum of the Wolf-Rayet star WR 48a

    NARCIS (Netherlands)

    Chiar, JE; Peeters, E; Tielens, A. G. G. M.

    2002-01-01

    We present the first detection of unidentified infrared (UIR) emission features at similar to6.4 and 7.9 mum in the spectrum of the dusty WC8 Wolf-Rayet star WR 48a. Based on the H-deficient nature of WC stars, we attribute the emission features to large carbonaceous molecules or amorphous carbon

  20. Nucleosynthesis in Wolf-Rayet stars and galactic cosmic-ray isotopic composition

    International Nuclear Information System (INIS)

    Prantzos, N.

    1984-01-01

    An explanation of the isotopic composition of galactic cosmic rays could provide some clues to the mystery of their origin. It seems now that the strong stellar winds of Wolf-Rayet stars could account for most of the isotopic anomalies that have been observed in cosmic rays. Some results are presented, obtained by detailed nucleosynthesis computations. 25 references

  1. The Wolf-Rayet hydrogen puzzle -- an observational point of view

    OpenAIRE

    Foellmi, C.; Marchenko, S. V.; Moffat, A. F. J.

    2005-01-01

    Significant amounts of hydrogen were found in very hot early-type single WN stars in the SMC and the LMC. Recently, we found similar evidence in the Wolf-Rayet star of a short-period LMC binary. We discuss here the relevance of hydrogen for WR star classification, models, the relation to metallicity, and the GRB progenitors.

  2. Wolf-Rayet stars and O-star runaways with HIPPARCOS - I. Kinematics

    NARCIS (Netherlands)

    Moffat, AFJ; Marchenko, SV; Seggewiss, W; van der Hucht, KA; Schrijver, H; Stenholm, B; Lundstrom, [No Value; Gunawan, DYAS; Sutantyo, W; van den Heuvel, EPJ; De Cuyper, JP; Gomez, AE

    Reliable systemic radial velocities are almost impossible to secure for Wolf-Rayet stars, difficult for O stars. Therefore, to study the motions - both systematic in the Galaxy and peculiar - of these two related types of hot, luminous star, we have examined the Hipparcos proper motions of some 70

  3. Neon Abundances from a Spitzer/IRS Survey of Wolf-Rayet Stars

    NARCIS (Netherlands)

    Ignace, R.; Cassinelli, J.P.; Tracy, G.; Churchwell, E.B.; Lamers, H.J.G.L.M.

    2007-01-01

    We report on neon abundances derived from Spitzer high resolution spectral data of eight Wolf-Rayet (WR) stars using the forbidden line of [Ne III] 15.56 μm. Our targets include four WN stars of subtypes 4-7, and four WC stars of subtypes 4-7. We derive ion fraction abundances γ of Ne2+ for the

  4. On planetary nebulae and Wolf-Rayet stars in the galactic-centre field

    International Nuclear Information System (INIS)

    Allen, D.A.

    1979-01-01

    A UK Schmidt objective-prism plate of the Galactic-centre field has been examined. Of the 74 objects in the field which have been catalogued as planetary nebulae, only half appear correctly classified; the others include Be stars, symbiotic stars, and stars without emission lines. A further 19 planetary nebulae and two Wolf-Rayet stars have been discovered. (author)

  5. Hemiterpenoids and Pyrazines in the Odoriferous Urine of the Maned Wolf

    NARCIS (Netherlands)

    Goodwin, T.E.; Songsasen, N.; Broederdorf, L.J.; Burkert, B.A.; Joi Chen, C.; Jackson, S.R.; Keplinger, K.B.; Rountree, M.E.; Waldrip, Z.J.; Wedell, M.E.; Desrochers, L.P.; Baker, W.K.; Helsper, J.P.F.G.

    2013-01-01

    Maned wolves ( Chrysocyon brachyurus ) are endemic to South America, monogamous, solitary, and threatened in the wild. Maned wolf urine has a pungent and powerful odour and is used for scent marking. There is evidence to suggest that the presence of a male may be required to initiate oestrus and/or

  6. Crystal structure of hemoglobin from the maned wolf (Chrysocyon brachyurus) using synchrotron radiation.

    Science.gov (United States)

    Fadel, Valmir; Canduri, Fernanda; Olivieri, Johnny R; Smarra, André L S; Colombo, Marcio F; Bonilla-Rodriguez, Gustavo O; de Azevedo, Walter F

    2003-12-01

    Crystal structure of hemoglobin isolated from the Brazilian maned wolf (Chrysocyon brachyurus) was determined using standard molecular replacement technique and refined using maximum-likelihood and simulated annealing protocols to 1.87A resolution. Structural and functional comparisons between hemoglobins from the Chrysocyon brachyurus and Homo sapiens are discussed, in order to provide further insights in the comparative biochemistry of vertebrate hemoglobins.

  7. Linking Community Communication to Conservation of the Maned Wolf in Central Brazil

    Science.gov (United States)

    Bizerril, Marcelo Ximenes A.; Soares, Carla Cruz; Santos, Jean Pierre

    2011-01-01

    This article describes the environmental education (EE) program developed in the neighboring community of Serra da Canastra National Park based on a research project focused on the maned wolf conservation. The article assesses three tools used to foster the community's participation in discussing local issues: (1) communal production of a book…

  8. Task Specificity and the Influence of Memory on Visual Search: Comment on Vo and Wolfe (2012)

    Science.gov (United States)

    Hollingworth, Andrew

    2012-01-01

    Recent results from Vo and Wolfe (2012b) suggest that the application of memory to visual search may be task specific: Previous experience searching for an object facilitated later search for that object, but object information acquired during a different task did not appear to transfer to search. The latter inference depended on evidence that a…

  9. To Find a Treasure: The Nuu-chah-nulth Wolf Mask

    Science.gov (United States)

    Kruger, Arnold

    2003-01-01

    The Wolf Ritual, or Tlukwana, with its associated regalia of masks, dances, costumes, and musical instruments, was a major feature of the Nuu-chah-nulth Winter Ceremonies. In common with other Northwest Coast Native nations, the lives of the Nuu-chah-nulth people were controlled by the seasons, and following a summer and autumn of gathering and…

  10. Gemini/GNIRS infrared spectroscopy of the Wolf-Rayet stellar wind in Cygnus X-3

    Science.gov (United States)

    Koljonen, K. I. I.; Maccarone, T. J.

    2017-12-01

    The microquasar Cygnus X-3 was observed several times with the Gemini North Infrared Spectrograph while the source was in the hard X-ray state. We describe the observed 1.0-2.4 μm spectra as arising from the stellar wind of the companion star and suggest its classification as a WN 4-6 Wolf-Rayet star. We attribute the orbital variations of the emission line profiles to the variations in the ionization structure of the stellar wind caused by the intense X-ray emission from the compact object. The strong variability observed in the line profiles will affect the mass function determination. We are unable to reproduce earlier results, from which the mass function for the Wolf-Rayet star was derived. Instead, we suggest that the system parameters are difficult to obtain from the infrared spectra. We find that the near-infrared continuum and the line spectra can be represented with non-LTE Wolf-Rayet atmosphere models if taking into account the effects arising from the peculiar ionization structure of the stellar wind in an approximative manner. From the representative models we infer the properties of the Wolf-Rayet star and discuss possible mass ranges for the binary components.

  11. Otoliths of the wolf-fishes (genus Anarrhichas Linnaeus, 1758) from the Northern Atlantic (Pisces, Perciformes)

    NARCIS (Netherlands)

    Nijssen, H.

    1964-01-01

    While working at the Rijksinstituut voor Visserijonderzoek (R.V.I.O.) at IJmuiden, I received through the courtesy of Mr. C. van Delft some specimens of the three northern Atlantic species of wolf-fishes. At IJmuiden they are brought in by commercial trawlers. The only data in the literature known

  12. An historical overview and update of wolf-moose interactions in northeastern Minnesota

    Science.gov (United States)

    Mech, L. David; Fieberg, John; Barber-Meyer, Shannon

    2018-01-01

    Wolf (Canis lupus) and moose (Alces americanus) populations in northeastern Minnesota, USA, have fluctuated for decades and, based on helicopter counts, moose numbers declined to a new low from 2006 to about 2012. Other steep declines were found in 1991 and 1998 during periods when moose counts were done with ®xed-wing aircraft; these declines also appeared to be real. Winter wolf numbers, monitored in part of the moose range, had been increasing since about 2002 to the highest population in decades in 2009. However, from 2009 to 2016, wolves decreased precipitously, and the moose-population decline leveled off from 2012 to 2017. Calf:population ratios from 1985 to 1997 and from 2005 to 2016 were inversely related to wolf numbers in the wolf-study area the previous winter both as wolves increased and decreased in abundance. Similarly, log annual growth rates of moose numbers were negatively correlated with counts of wolves in the prior year. Other factors such as nutrition and parasites, and possibly climate change, likely have been involved in the recent moose decline. However, wolves, as in other areas, appear to have contributed to the decline in the northeastern Minnesota moose population at least in part through predation on calves, supporting earlier reports. Published 2018. This article is a U.S. Government work and is in the public domain in the USA.

  13. GMRT Low Radio Frequency Study of the Wolf Rayet Galaxy NGC ...

    Indian Academy of Sciences (India)

    In this paper, we present the first low frequency (< 1.4 GHz) radio continuum study of a Wolf Rayet galaxy NGC 4214 using the Giant Meterwave Radio Telescope (GMRT). We detect diffuse extended emission from the galaxy disk at 325 MHz and find that the radio emission closely follows the ultraviolet emission mapped by ...

  14. GMRT Low Radio Frequency Study of the Wolf Rayet Galaxy NGC ...

    Indian Academy of Sciences (India)

    Abstract. In this paper, we present the first low frequency (< 1.4 GHz) radio continuum study of a Wolf Rayet galaxy NGC 4214 using the. Giant Meterwave Radio Telescope (GMRT). We detect diffuse extended emission from the galaxy disk at 325 MHz and find that the radio emis- sion closely follows the ultraviolet emission ...

  15. Massive stars on the verge of exploding: the properties of oxygen sequence Wolf-Rayet stars

    NARCIS (Netherlands)

    Tramper, F.; Straal, S.M.; Sanyal, D.; Sana, H.; de Koter, A.; Gräfener, G.; Langer, N.; Vink, J.S.; de Mink, S.E.; Kaper, L.

    2015-01-01

    Context. Oxygen sequence Wolf-Rayet (WO) stars are a very rare stage in the evolution of massive stars. Their spectra show strong emission lines of helium-burning products, in particular highly ionized carbon and oxygen. The properties of WO stars can be used to provide unique constraints on the

  16. Gray wolf (Canis lupus) is a natural definitive host for Neospora caninum

    Science.gov (United States)

    The gray wolf (Canis lupus) was found to be a new natural definitive host for Neospora caninum. This finding is based on the recovery of Neospora-like oocysts from the feces of 3 of 73 wolves from Minnesota examined at necropsy, and on successful amplification of N. caninum-specific sequences from ...

  17. Complete Genomic Sequence of Canine Distemper Virus from an Ethiopian Wolf.

    Science.gov (United States)

    Marston, Denise A; Watson, Jemma; Wise, Emma L; Ellis, Richard J; Bedin, Eric; Ayalew, Girma; Abute, Muktar; de Lamballerie, Xavier; Fooks, Anthony R; Sillero-Zubiri, Claudio; Banyard, Ashley C

    2017-07-20

    Canine distemper virus (CDV) has been implicated in population declines of wildlife, including many threatened species. Here we present the full genome of CDV from an Ethiopian wolf, Canis simensis , the world's rarest and most endangered canid. © Crown copyright 2017.

  18. Isolation and genetic characterization of Toxoplasma gondii from the gray wolf Canis lupus

    Science.gov (United States)

    Little is known of the genetic diversity of Toxoplasma gondii circulating in wildlife. In the present study feral gray wolf (Canis lupus) from Minnesota were examined for T. gondii infection. Antibodies to T. gondii were detected in 130 (52.4%) of 248 wolves tested by the modified agglutination test...

  19. William L. Wolfe, 1989 President of SPIE, encourages scientists from Eastern Europe

    Science.gov (United States)

    Schmit, Joanna

    2012-10-01

    In 1990 Professor Wolfe after his SPIE presidency trekked the world, even making it as far as post-communist Poland, to see (in the visible and maybe in infrared - who knows) the work of optical scientists hidden behind the iron curtain. I am not sure if he was ready for how different that world was at this time, but for sure he was very inquisitive and eager to learn about the nuances of Poland right after the fall of communism. He met, visited with and encouraged young and old scientists from Poland, Russia, Hungary and Lithuania to add their expertise to the scientific conversations happening in the West. His mission in Poland was to invite us all, and he was ready to help us achieve our dreams. I was one of those he encouraged. This talk is my personal reflection of Professor Wolfe as an encouraging and sometimes brave SPIE pioneer - a stranger in a strange land - and as an energetic, caring SPIE president, Optical Sciences professor and human being. Disclaimer: Professor Bill Wolfe's contributions to the field of radiometry are well known and very well recognized. This conference is a tribute to him. However, my paper is not on radiometry; rather, I wish to illustrate the adventurous, caring and positive Bill Wolfe that helped me find my way to the American desert Southwest.

  20. False alerts in air traffic control conflict alerting system: is there a "cry wolf" effect?

    Science.gov (United States)

    Wickens, Christopher D; Rice, Stephen; Keller, David; Hutchins, Shaun; Hughes, Jamie; Clayton, Krisstal

    2009-08-01

    The aim is to establish the extent to which the high false-alarm rate of air traffic control midair conflict alerts is responsible for a "cry wolf' effect-where true alerts are not responded to and all alerts are delayed in their response. Some aircraft collisions have been partly attributed to the cry wolf effect, and in other domains (health care and systems monitoring), there is a causal connection between false-alarm rate and cry wolf behavior. We hypothesized that a corresponding relationship exists in air traffic control (ATC). Aircraft track and alert system behavior data surrounding 495 conflict alerts were analyzed to identify true and false alerts, trajectory type, and controller behavior. Forty-five percent of the alerts were false, ranging from 0.28 to 0.58. Although centers with more false alerts contributed to more nonresponses, there was no evidence that these were nonresponses to true alerts or that response times were delayed in those centers. Instead, controllers showed desirable anticipatory behavior by issuing trajectory changes prior to the alert. Those trajectory pairs whose conflicts were more difficult to visualize induced more reliance on, and less compliance with, the alerting system. The high false-alarm rate does not appear to induce cry wolf behavior in the context of en route ATC conflict alerts. There is no need to substantially modify conflict alert algorithms, but the conflict alert system may be modified to address difficult-to-visualize conflicts.

  1. Wolf-Rayet stars and O-star runaways with HIPPARCOS - II. Photometry

    NARCIS (Netherlands)

    Marchenko, SV; Moffat, AFJ; van der Hucht, KA; Seggewiss, W; Schrijver, H; Stenholm, B; Lundstrom, [No Value; Setia Gunawan, DYA; Sutantyo, W; van den Heuvel, EPJ; De Cuyper, JP; Gomez, AE

    Abundant HIPPARCOS photometry over 3 years of 141 O and Wolf-Rayet stars, including 8 massive X-ray binaries, provides a magnificent variety of light curves at the sigma similar to 1-5% level. Among the most interesting results, we mention: optical outbursts in HD 102567 (MXRB), coinciding with

  2. Planetary nebulae and Wolf-Rayet stars in the galactic-centre field

    Energy Technology Data Exchange (ETDEWEB)

    Allen, D A [Anglo-Australian Observatory, Epping (Australia)

    1979-06-01

    A UK Schmidt objective-prism plate of the Galactic-centre field has been examined. Of the 74 objects in the field which have been catalogued as planetary nebulae, only half appear correctly classified; the others include Be stars, symbiotic stars, and stars without emission lines. A further 19 planetary nebulae and two Wolf-Rayet stars have been discovered.

  3. Genetic evidence of hybridization between Onothera wolfii (Wolf's evening primrose) and O. glaziovana, a garden escape

    Science.gov (United States)

    Jennifer DeWoody; Leonel Arguello; David Imper; Robert D. Westfall; Valerie D. Hipkins

    2008-01-01

    Isozyme analysis of the rare Oenothera wolfii (Wolf's evening primrose) and the garden escape, O. glazioviana, indicates that hybridization between these species may be more widespread than morphological evidence indicates. Although both species contained low amounts of genetic variation, unique alleles were identified in...

  4. Expression of a wolf spider toxin in tobacco inhibits the growth of microbes and insects

    Science.gov (United States)

    Abstract Lycotoxin I, from the wolf spider (Lycosa carolinensis), is an amphipathic pore-forming peptide that has antimicrobial and anti-insect activity. Constitutive expression of a lycotoxin I odified for oral toxicity to insects in tobacco (Nicotiana abacum) conferred significantly enhanced resis...

  5. High-resolution 3 T MRI of traumatic and degenerative triangular fibrocartilage complex (TFCC) abnormalities using Palmer and Outerbridge classifications.

    Science.gov (United States)

    Nozaki, T; Rafijah, G; Yang, L; Ueno, T; Horiuchi, S; Hitt, D; Yoshioka, H

    2017-10-01

    To investigate the usefulness of high-resolution 3 T magnetic resonance imaging (MRI) for the evaluation of traumatic and degenerative triangular fibrocartilage complex (TFCC) abnormalities among three groups: patients presenting with wrist pain who were (a) younger than age 50 years or (b) age 50 or older (PT<50 and PT≥50, respectively), and (c) asymptomatic controls who were younger than age 50 years (AC). High-resolution 3 T MRI was evaluated retrospectively in 96 patients, including 47 PT<50, 38 PT≥50, and 11 AC. Two board-certified radiologists reviewed the MRI images independently. MRI features of TFCC injury were analysed according to the Palmer classification, and cartilage degeneration around the TFCC was evaluated using the Outerbridge classification. Differences in MRI findings among these groups were detected using chi-square test. Cohen's kappa was calculated to assess interobserver and intra-observer reliability. The incidence of Palmer class 1A, 1C and 1D traumatic TFCC injury was significantly (p<0.05) higher in PT≥50 than in PT<50 (class 1A: 47.4% versus 27.7%, class 1C: 31.6% versus 12.8%, and class 1D: 21.1% versus 2.1%). Likewise, MRI findings of TFCC degeneration were observed more frequently in PT≥50 than in PT<50 (p<0.01). Outerbridge grade 2 or higher cartilage degeneration was significantly (p<0.01) more frequently seen in PT≥50 than in PT<50 (55.3% versus 17% in the lunate, 28.9% versus 4.3% in the triquetrum, 73.7% versus 12.8% in the ulna). High-resolution wrist MRI at 3 T enables detailed evaluation of TFCC traumatic injury and degenerative changes using the Palmer and Outerbridge classifications, with good or excellent interobserver and intra-observer reliability. Copyright © 2017 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved.

  6. Wolf population dynamics in the U.S. Northern Rocky Mountains are affected by recruitment and human-caused mortality

    Science.gov (United States)

    Gude, J.A.; Mitchell, M.S.; Russell, R.E.; Sime, C.A.; Bangs, E.E.; Mech, L.D.; Ream, R.R.

    2012-01-01

    Reliable analyses can help wildlife managers make good decisions, which are particularly critical for controversial decisions such as wolf (Canis lupus) harvest. Creel and Rotella (2010) recently predicted substantial population declines in Montana wolf populations due to harvest, in contrast to predictions made by Montana Fish, Wildlife and Parks (MFWP). We replicated their analyses considering only those years in which field monitoring was consistent, and we considered the effect of annual variation in recruitment on wolf population growth. Rather than assuming constant rates, we used model selection methods to evaluate and incorporate models of factors driving recruitment and human-caused mortality rates in wolf populations in the Northern Rocky Mountains. Using data from 27 area-years of intensive wolf monitoring, we show that variation in both recruitment and human-caused mortality affect annual wolf population growth rates and that human-caused mortality rates have increased with the sizes of wolf populations. We document that recruitment rates have decreased over time, and we speculate that rates have decreased with increasing population sizes and/or that the ability of current field resources to document recruitment rates has recently become less successful as the number of wolves in the region has increased. Estimates of positive wolf population growth in Montana from our top models are consistent with field observations and estimates previously made by MFWP for 2008-2010, whereas the predictions for declining wolf populations of Creel and Rotella (2010) are not. Familiarity with limitations of raw data, obtained first-hand or through consultation with scientists who collected the data, helps generate more reliable inferences and conclusions in analyses of publicly available datasets. Additionally, development of efficient monitoring methods for wolves is a pressing need, so that analyses such as ours will be possible in future years when fewer resources

  7. Assessment of prey vulnerability through analysis of wolf movements and kill sites.

    Science.gov (United States)

    Bergman, Eric J; Garrott, Robert A; Creel, Scott; Borkowski, John J; Jaffe, Rosemary; Watson, E G R

    2006-02-01

    Within predator-prey systems behavior can heavily influence spatial dynamics, and accordingly, the theoretical study of how spatial dynamics relate to stability within these systems has a rich history. However, our understanding of these behaviors in large mammalian systems is poorly developed. To address the relationship between predator selection patterns, prey density, and prey vulnerability, we quantified selection patterns for two fine-scale behaviors of a recovering wolf (Canis lupus) population in Yellowstone National Park, Wyoming, USA. Wolf spatial data were collected between November and May from 1998-1999 until 2001-2002. Over four winters, 244 aerial locations, 522 ground-based telemetry locations, 1287 km of movement data from snow tracking, and the locations of 279 wolf kill sites were recorded. There was evidence that elk (Cervus elaphus) and bison (Bison bison) densities had a weak effect on the sites where wolves traveled and made kills. Wolf movements showed a strong selection for geothermal areas, meadows, and areas near various types of habitat edges. Proximity to edge and habitat class also had a strong influence on the locations where elk were most vulnerable to predation. There was little evidence that wolf kill sites differed from the places where wolves traveled, indicating that elk vulnerability influenced where wolves selected to travel. Our results indicate that elk are more vulnerable to wolves under certain conditions and that wolves are capable of selecting for these conditions. As such, vulnerability plays a central role in predator-prey behavioral games and can potentially impact the systems to which they relate.

  8. An investigation of several aspects of LANDSAT-5 data quality. [Palmer County, Shelby, mt; White sands, NM; Great Salt Lake, UT; San Matted Bridge and Sacramento, California

    Science.gov (United States)

    Wrigley, R. C. (Principal Investigator)

    1984-01-01

    Band-to-band registration, geodetic registration, interdector noise, and the modulation transfer function (MTE) are discussed for the Palmer County; TX scene. Band combinations for several LANDSAT 4 and LANDSAT 5 scenes; the geodetic registration test for the Sacramento, CA area; periodic noise components in TM band 5; and grey level measurements by detector for Great Salt Lake (UT) dark water forescans and backscans are considered. Results of MTF analyses of the San Mateo Bridge and of TM high resolution and aerial Daedalus scanner imagery are consistent and appear to be repeatable. An oil-on-sand target was constructed on the White Sands Missile Range in New Mexico. The two-image analysis procedure used is summarized.

  9. Statistical mechanics of stochastic neural networks: Relationship between the self-consistent signal-to-noise analysis, Thouless-Anderson-Palmer equation, and replica symmetric calculation approaches

    International Nuclear Information System (INIS)

    Shiino, Masatoshi; Yamana, Michiko

    2004-01-01

    We study the statistical mechanical aspects of stochastic analog neural network models for associative memory with correlation type learning. We take three approaches to derive the set of the order parameter equations for investigating statistical properties of retrieval states: the self-consistent signal-to-noise analysis (SCSNA), the Thouless-Anderson-Palmer (TAP) equation, and the replica symmetric calculation. On the basis of the cavity method the SCSNA can be generalized to deal with stochastic networks. We establish the close connection between the TAP equation and the SCSNA to elucidate the relationship between the Onsager reaction term of the TAP equation and the output proportional term of the SCSNA that appear in the expressions for the local fields

  10. The radii of the Wolf-Rayet stars and the extent of their chromosphere-corona formation

    Energy Technology Data Exchange (ETDEWEB)

    Sahade, J [Instituto de Astronomia y Fisica del Espacio, Buenos Aires, Argentina; Zorec, J [College de France, Paris, France

    1981-03-01

    The radii of 14 Wolf-Rayet stars are computed on the basis of previously reported absolute fluxes in the region from 4150 to 8000 A for 10 WN stars and from 3650 to 8000 A for four WC stars. For comparison, the radii of 11 Of stars are also calculated. The Wolf-Rayet radii are found to range from about 10 to 35 solar radii, values that do not appear to provide supporting evidence for the hypothesis that Of stars evolve into late WN stars. Available UV observations of Gamma-2 Vel are used to investigate the extent of the chromosphere-corona structure in Wolf-Rayet stars. It is suggested that the second electron-temperature maximum in a recently proposed model for the extended envelopes of Wolf-Rayet stars should be further than about 300 solar radii from the center of a star.

  11. Elk migration patterns and human activity influence wolf habitat use in the Greater Yellowstone Ecosystem.

    Science.gov (United States)

    Nelson, Abigail A; Kauffman, Matthew J; Middleton, Arthur D; Jimenez, Michael D; McWhirter, Douglas E; Barber, Jarrett; Gerow, Kenneth

    2012-12-01

    Identifying the ecological dynamics underlying human-wildlife conflicts is important for the management and conservation of wildlife populations. In landscapes still occupied by large carnivores, many ungulate prey species migrate seasonally, yet little empirical research has explored the relationship between carnivore distribution and ungulate migration strategy. In this study, we evaluate the influence of elk (Cervus elaphus) distribution and other landscape features on wolf (Canis lupus) habitat use in an area of chronic wolf-livestock conflict in the Greater Yellowstone Ecosystem, USA. Using three years of fine-scale wolf (n = 14) and elk (n = 81) movement data, we compared the seasonal habitat use of wolves in an area dominated by migratory elk with that of wolves in an adjacent area dominated by resident elk. Most migratory elk vacate the associated winter wolf territories each summer via a 40-60 km migration, whereas resident elk remain accessible to wolves year-round. We used a generalized linear model to compare the relative probability of wolf use as a function of GIS-based habitat covariates in the migratory and resident elk areas. Although wolves in both areas used elk-rich habitat all year, elk density in summer had a weaker influence on the habitat use of wolves in the migratory elk area than the resident elk area. Wolves employed a number of alternative strategies to cope with the departure of migratory elk. Wolves in the two areas also differed in their disposition toward roads. In winter, wolves in the migratory elk area used habitat close to roads, while wolves in the resident elk area avoided roads. In summer, wolves in the migratory elk area were indifferent to roads, while wolves in resident elk areas strongly avoided roads, presumably due to the location of dens and summering elk combined with different traffic levels. Study results can help wildlife managers to anticipate the movements and establishment of wolf packs as they expand into areas

  12. Microbiota and anthropic interference on antimicrobial resistance profile of bacteria isolated from Brazilian maned-wolf (Chrysocyon brachyurus)

    OpenAIRE

    Vieira-da-Motta, Olney; Eckhardt-de-Pontes, Luiz Antonio; Petrucci, Melissa Paes; dos Santos, Israel Pereira; da Cunha, Isabel Candia Nunes; Morato, Ronaldo Gonçalves

    2014-01-01

    Both the study of Brazilian wild mammal fauna and the conditions that foster the preservation of endangered species, such as Brazilian Maned-wolf (Chrysocyon brachyurus), in wild life are of extreme importance. In order to study the resistance profile of microbiota bacterial colonizing Brazilian Maned-wolf, this work investigated samples from eight male captive and free roaming animals originating from different Brazilian geographical regions. Samples for microbiological purposes were collect...

  13. Conservation implications for the Himalayan wolf Canis (lupus) himalayensis based on observations of packs and home sites in Nepal

    OpenAIRE

    Werhahn, G; Kusi, N; Sillero-Zubiri, C; Macdonald, DW

    2017-01-01

    We provide insights into pack composition and den site parameters of the Himalayan wolf Canis (lupus) himalayensis based on observations of free-ranging wolves in three study areas in Nepal. We combine this with a social survey of the local Buddhist communities regarding human–carnivore conflict, to draw inferences for conservation practice in the Nepalese Himalayas. We recorded eight wolf packs (with an average composition of two adults and three pups), and found five home sites in high-alti...

  14. DISCOVERY OF A WOLF-RAYET STAR THROUGH DETECTION OF ITS PHOTOMETRIC VARIABILITY

    Energy Technology Data Exchange (ETDEWEB)

    Littlefield, Colin [Law School, University of Notre Dame, Notre Dame, IN 46556 (United States); Garnavich, Peter; McClelland, Colin; Rettig, Terrence [Physics Department, University of Notre Dame, Notre Dame, IN 46556 (United States); Marion, G. H. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Vinko, Jozsef [Department of Optics, University of Szeged (Hungary); Wheeler, J. Craig [Astronomy Department, University of Texas, Austin, TX 78712 (United States)

    2012-06-15

    We report the serendipitous discovery of a heavily reddened Wolf-Rayet star that we name WR 142b. While photometrically monitoring a cataclysmic variable, we detected weak variability in a nearby field star. Low-resolution spectroscopy revealed a strong emission line at 7100 A, suggesting an unusual object and prompting further study. A spectrum taken with the Hobby-Eberly Telescope confirms strong He II emission and an N IV 7112 A line consistent with a nitrogen-rich Wolf-Rayet star of spectral class WN6. Analysis of the He II line strengths reveals no detectable hydrogen in WR 142b. A blue-sensitive spectrum obtained with the Large Binocular Telescope shows no evidence for a hot companion star. The continuum shape and emission line ratios imply a reddening of E(B - V) = 2.2-2.6 mag. We estimate that the distance to WR 142b is 1.4 {+-} 0.3 kpc.

  15. Gastrointestinal parasites of maned wolf (Chrysocyon brachyurus, Illiger 1815 in a suburban area in southeastern Brazil

    Directory of Open Access Journals (Sweden)

    RL Massara

    Full Text Available AbstractWe examined 42 maned wolf scats in an unprotected and disturbed area of Cerrado in southeastern Brazil. We identified six helminth endoparasite taxa, being Phylum Acantocephala and Family Trichuridae the most prevalent. The high prevalence of the Family Ancylostomatidae indicates a possible transmission via domestic dogs, which are abundant in the study area. Nevertheless, our results indicate that the endoparasite species found are not different from those observed in protected or least disturbed areas, suggesting a high resilience of maned wolf and their parasites to human impacts, or a common scenario of disease transmission from domestic dogs to wild canid whether in protected or unprotected areas of southeastern Brazil.

  16. NOVEL RADIOGRAPHIC TECHNIQUE FOR PREGNANCY DETECTION IN THE MANED WOLF (CHRYSOCYON BRACHYURUS) WITHOUT ANESTHESIA.

    Science.gov (United States)

    Aitken-Palmer, Copper; A C Z M, Dipl; Ware, Lisa H; Braun, Lacey; Lang, Kenneth; Joyner, Priscilla H

    2017-03-01

    Maned wolves ( Chrysocyon brachyurus ) maintained in ex situ populations challenge veterinarians and managers with high neonatal mortality and parental incompetence. These challenges led to the development of a novel diagnostic approach for pregnancy detection using radiographic imaging without anesthesia or sedation. To do this, a specialized crate was constructed to easily contain a single maned wolf, allowing the capture of lateral projection radiographic images of the abdomen prior to and throughout a 66-day pregnancy (days 20, 34, 48, and 55 of 66). Radiographs taken at days 48 and 55 postbreeding showed evidence of neonatal skeleton mineralization, confirming pregnancy with two pups. The dam gave birth at day 66 to two pups. This technical report describes a novel approach without anesthesia for successful radiographic pregnancy detection and determination of litter size in the maned wolf, a midsize carnivore, using a specially constructed crate.

  17. First record of entodiniomorph ciliates in a carnivore, the maned wolf (Chrysocyon brachyurus), from Brazil.

    Science.gov (United States)

    Vynne, Carly; Kinsella, John M

    2009-06-01

    The entodiniomorph ciliates (Ciliophora: Entodiniomorphida) are endosymbiotes widely found in the intestines of herbivorous mammals. These commensals commonly occur in the Artiodactyla and Perissodactyla and have also been described in the Proboscidea, Primates, Rodentia, and Diprotodontia. This study reports the first finding of a ciliate in a member of order Carnivora, the maned wolf (Chrysocyon brachyurus). Fecal samples from wild and captive maned wolves were screened using ethyl acetate sedimentation. Prevalence in fecal samples collected from free-ranging maned wolves in Brazil was 40% (6 of 15). Fecal samples from two of four captive individuals from the St. Louis Zoo also had the same species of ciliate. The largely frugivorous diet of the maned wolf likely explains the occurrence of these normally herbivore-associated endosymbiotes in a carnivore.

  18. CMB anisotropies at all orders: the non-linear Sachs-Wolfe formula

    Energy Technology Data Exchange (ETDEWEB)

    Roldan, Omar, E-mail: oaroldan@if.ufrj.br [Instituto de Física, Universidade Federal do Rio de Janeiro, 21941-972, Rio de Janeiro, RJ (Brazil)

    2017-08-01

    We obtain the non-linear generalization of the Sachs-Wolfe + integrated Sachs-Wolfe (ISW) formula describing the CMB temperature anisotropies. Our formula is valid at all orders in perturbation theory, is also valid in all gauges and includes scalar, vector and tensor modes. A direct consequence of our results is that the maps of the logarithmic temperature anisotropies are much cleaner than the usual CMB maps, because they automatically remove many secondary anisotropies. This can for instance, facilitate the search for primordial non-Gaussianity in future works. It also disentangles the non-linear ISW from other effects. Finally, we provide a method which can iteratively be used to obtain the lensing solution at the desired order.

  19. CMB anisotropies at all orders: the non-linear Sachs-Wolfe formula

    International Nuclear Information System (INIS)

    Roldan, Omar

    2017-01-01

    We obtain the non-linear generalization of the Sachs-Wolfe + integrated Sachs-Wolfe (ISW) formula describing the CMB temperature anisotropies. Our formula is valid at all orders in perturbation theory, is also valid in all gauges and includes scalar, vector and tensor modes. A direct consequence of our results is that the maps of the logarithmic temperature anisotropies are much cleaner than the usual CMB maps, because they automatically remove many secondary anisotropies. This can for instance, facilitate the search for primordial non-Gaussianity in future works. It also disentangles the non-linear ISW from other effects. Finally, we provide a method which can iteratively be used to obtain the lensing solution at the desired order.

  20. Demographic effects of canine parvovirus on a free-ranging wolf population over 30 years

    Science.gov (United States)

    Mech, L.D.; Goyal, S.M.; Paul, W.J.; Newton, W.E.

    2008-01-01

    We followed the course of canine parvovinis (CPV) antibody prevalence in a subpopulation of wolves (Canis 1upus) in northeastern Minnesota from 1973, when antibodies were first detected, through 2004. Annual early pup survival was reduced by 70%, and wolf population change was related to CPV antibody prevalence. In the greater Minnesota population of 3,000 wolves, pup survival was reduced by 40-60%. This reduction limited the Minnesota wolf population rate of increase to about 4% per year compared with increases of 16-58% in other populations. Because it is young wolves that disperse, reduced pup survival may have caused reduced dispersal and reduced recolonization of new range in Minnesota. ?? Wildlife Disease Association 2008.

  1. Parsing demographic effects of canine pParvovirus on a Minnesota wolf population

    Science.gov (United States)

    Mech, L. David; Goyal, Sagar M.

    2011-01-01

    We examined 35 years of relationships among wolf (Canis lupus) pup survival, population change and canine parvovirus (CPV) seroprevalence in Northeastern Minnesota to determine when CPV exerted its strongest effects. Using correlation analysis of data from five periods of 7-years each from 1973 through 2007, we learned that the strongest effect of CPV on pup survival (r = -0.73) and on wolf population change (r = -0.92) was during 1987 to 1993. After that, little effect was documented despite a mean CPV seroprevalence from 1994 of 2007 of 70.8% compared with 52.6% during 1987 to 1993. We conclude that after CPV became endemic and produced its peak effect on the study population, that population developed enough immunity to withstand the disease.

  2. The wolf reference genome sequence (Canis lupus lupus) and its implications for Canis spp. population genomics

    DEFF Research Database (Denmark)

    Gopalakrishnan, Shyam; Samaniego Castruita, Jose Alfredo; Sinding, Mikkel Holger Strander

    2017-01-01

    Background An increasing number of studies are addressing the evolutionary genomics of dog domestication, principally through resequencing dog, wolf and related canid genomes. There is, however, only one de novo assembled canid genome currently available against which to map such data - that of a......Background An increasing number of studies are addressing the evolutionary genomics of dog domestication, principally through resequencing dog, wolf and related canid genomes. There is, however, only one de novo assembled canid genome currently available against which to map such data...... that regardless of the reference genome choice, most evolutionary genomic analyses yield qualitatively similar results, including those exploring the structure between the wolves and dogs using admixture and principal component analysis. However, we do observe differences in the genomic coverage of re-mapped...

  3. The Wolf-Rayet nebula NGC 3199 - an interstellar snow plough?

    Science.gov (United States)

    Dyson, J. E.; Ghanbari, J.

    1989-12-01

    The Wolf-Rayet nebula NGC 3199 has a highly asymmetric morphology, with a very bright hemisphere near the exciting star HD 89358 and a much fainter and more extended other hemisphere. This nebula is modeled in terms of the distorted bubble produced by a moving star blowing a strong stellar wind into a surrounding uniform interstellar medium; this model is fitted to the morphology and observed kinematic data. The exciting star appears to be moving at about 60 km/s into local interstellar gas of density of about 10/cu cm, and has a mass-loss rate of about 0.000027 solar mass/yr. This latter mass-loss rate is in excellent agreement with observed mass-loss rates from Wolf-Rayet stars.

  4. The Wolf at the Door: Competing Land Use Values on Military Installations

    Science.gov (United States)

    1996-04-01

    The Gray Wolf ............. ................ 88 a. Return to Yellowstone ...... .......... 90 1. Final EIS ......... ............. 91 2. Wolves ...western North and South Dakota. 233 "A final devastating blow fell when officials in Yellowstone decided to exterminate the park wolves --they succeeded... Wolves into Yellowstone National Park and central Idaho.32° FWS Regional Director Ralph Morgenweck issued the Final EIS (FEIS) on April 14, 1994.321 The

  5. Differential wolf-pack-size persistence and the role of risk when hunting dangerous prey

    Science.gov (United States)

    Barber-Meyer, Shannon M.; Mech, L. David; Newton, Wesley E.; Borg, Bridget

    2016-01-01

    Risk to predators hunting dangerous prey is an emerging area of research and could account for possible persistent differences in gray wolf (Canis lupus) pack sizes. We documented significant differences in long-term wolf-pack-size averages and variation in the Superior National Forest (SNF), Denali National Park and Preserve, Yellowstone National Park, and Yukon, Canada (pwolves’ risk when hunting primary prey, for those packs (N=3) hunting moose (Alces americanus) were significantly larger than those (N=10) hunting white-tailed deer (Odocoileus virginianus) (F1,8=16.50, p=0.004). Our data support the hypothesis that differential pack-size persistence may be perpetuated by differences in primary prey riskiness to wolves, and we highlight two important extensions of this idea: (1) the potential for wolves to provision and defend injured packmates from other wolves and (2) the importance of less-risky, buffer prey to pack-size persistence and year-to-year variation. Risk to predators hunting dangerous prey is an emerging area of research and could account for possible persistent differences in gray wolf (Canis lupus) pack sizes. We documented significant differences in long-term wolf-pack-size averages and variation in the Superior National Forest (SNF), Denali National Park and Preserve, Yellowstone National Park, and Yukon, Canada (pwolves’ risk when hunting primary prey, for those packs (N=3) hunting moose (Alces americanus) were significantly larger than those (N=10) hunting white-tailed deer (Odocoileus virginianus) (F1,8=16.50, p=0.004). Our data support the hypothesis that differential pack-size persistence may be perpetuated by differences in primary prey riskiness to wolves, and we highlight two important extensions of this idea: (1) the potential for wolves to provision and defend injured packmates from other wolves and (2) the importance of less-risky, buffer prey to pack-size persistence and year-to-year variation.

  6. Electron density in the emission-line region of Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Varshni, Y.P.

    1978-01-01

    The Inglis-Teller relation, generalized for a hydrogen-like or alkali-like ion with an arbitrary core charge, is used to estimate the electron density in the emission-like region of Wolf-Rayet stars. It is found that the electron density in the region which gives rise to He II emission lines is approximately = 4 x 10 14 cm -3 . (Auth.)

  7. Further Wolf-Rayet stars in the starburst cluster Westerlund 1

    OpenAIRE

    Negueruela, I.; Clark, J. S.

    2005-01-01

    We present new low and intermediate-resolution spectroscopic observations of the Wolf Rayet (WR) star population in the massive starburst cluster Westerlund 1. Finding charts are presented for five new WRs - four WNL and one WCL - raising the current total of known WRs in the cluster to 19. We also present new spectra and correct identifications for the majority of the 14 WR stars previously known, notably confirming the presence of two WNVL stars. Finally we briefly discuss the massive star ...

  8. Extraction of Unerupted Maxillary Canine Teeth in a Maned Wolf (Chrysocyon brachyurus

    Directory of Open Access Journals (Sweden)

    Lourdes M. B. Pessoa

    2016-01-01

    Full Text Available The purpose of this case report is to describe the diagnosis and treatment of unerupted canine teeth in a maned wolf. After physical examination, complete blood count, and serum biochemical profile, the animal underwent general anesthesia and head radiography was performed to confirm the diagnosis. The treatment consisted of the extraction of both maxillary canine teeth and clinical and radiographic follow-up of the right mandibular canine tooth.

  9. Extraction of Unerupted Maxillary Canine Teeth in a Maned Wolf (Chrysocyon brachyurus)

    OpenAIRE

    Pessoa, Lourdes M. B.; Roza, Marcello; Farias, Anderson; Jesus, Pedro Henrique de; Campbell, Rita de Cassia; Pinho, Mariângela Pereira de

    2016-01-01

    The purpose of this case report is to describe the diagnosis and treatment of unerupted canine teeth in a maned wolf. After physical examination, complete blood count, and serum biochemical profile, the animal underwent general anesthesia and head radiography was performed to confirm the diagnosis. The treatment consisted of the extraction of both maxillary canine teeth and clinical and radiographic follow-up of the right mandibular canine tooth.

  10. Disease, food and reproduction of the maned wolf: Chrysocyon Brachyurus (Illiger) (Carnivora, Canidae) in southeast Brazil

    OpenAIRE

    Carvalho, Cory T. de; Vasconcellos, Luiz E. M.

    1995-01-01

    The most frequent endoparasite of the Maned wolf - Chrysocyon brachyurus (Illiger, 1815) is the giant kidney-worm. Dioctophyma renale (Goeze, 1782). It has heen responsible for the majority of deaths of captive animals. Twenty-six marked wolves have been followed in the field with ear-tags and radio-collar tagged (Tab. II) to investigate their interactions with the environment, their diurnal shelters, movements and habits, and their delivery sites. Ten years of life history data have heen gat...

  11. The complete mitochondrial genome sequence of the maned wolf (Chrysocyon brachyurus).

    Science.gov (United States)

    Zhao, Chao; Yang, Xiufeng; Zhang, Honghai; Zhang, Jin; Chen, Lei; Sha, Weilai; Liu, Guangshuai

    2016-01-01

    In this study, the complete mitochondrial genome of the maned wolf (Chrysocyon brachyurus), the unique species in Chrysocyon, was sequenced and reported for the first time using blood samples obtained from a female individual in Shanghai Zoo, China. Sequence analysis showed that the genome structure was in accordance with other Canidae species and it contained 12 S rRNA gene, 16 S rRNA gene, 22 tRNA genes, 13 protein-coding genes and 1 control region.

  12. ISO-SWS spectrophotometry of galactic Wolf-Rayet stars: preliminary results.

    NARCIS (Netherlands)

    van der Hucht, K. A.; Morris, P. W.; Williams, P. M.; Setia Gunawan, D. Y. A.; Beintema, D. A.; Boxhoorn, D. R.; de Graauw, T.; Heras, A.; Kester, D. J. M.; Lahuis, F.; Leech, K. J.; Roelfsema, P. R.; Salama, A.; Valentijn, E. A.; Vandenbussche, B.

    1996-01-01

    ISO-SWS spectra of seven late-type galactic Wolf-Rayet stars are discussed. A high resolution spectrum (2.3-29.6μm, λ/{DELTA}λ=~820-1700) of the WC8 star WR11 (γ^2^ Vel) is shown and its Ne abundance is discussed. Medium resolution spectra (λ/{DELTA}λ=~250-600) of the WC8-9 stars WR48a, WR98a,

  13. Decoding Group Vocalizations: The Acoustic Energy Distribution of Chorus Howls Is Useful to Determine Wolf Reproduction.

    Directory of Open Access Journals (Sweden)

    Vicente Palacios

    Full Text Available Population monitoring is crucial for wildlife management and conservation. In the last few decades, wildlife researchers have increasingly applied bioacoustics tools to obtain information on several essential ecological parameters, such as distribution and abundance. One such application involves wolves (Canis lupus. These canids respond to simulated howls by emitting group vocalizations known as chorus howls. These responses to simulated howls reveal the presence of wolf litters during the breeding period and are therefore often used to determine the status of wolf populations. However, the acoustic structure of chorus howls is complex and discriminating the presence of pups in a chorus is sometimes difficult, even for experienced observers. In this study, we evaluate the usefulness of analyses of the acoustic energy distribution in chorus howls to identify the presence of pups in a chorus. We analysed 110 Iberian wolf chorus howls with known pack composition and found that the acoustic energy distribution is concentrated at higher frequencies when there are pups vocalizing. We built predictive models using acoustic energy distribution features to determine the presence of pups in a chorus, concluding that the acoustic energy distribution in chorus howls can be used to determine the presence of wolf pups in a pack. The method we outline here is objective, accurate, easily implemented, and independent of the observer's experience. These advantages are especially relevant in the case of broad scale surveys or when many observers are involved. Furthermore, the analysis of the acoustic energy distribution can be implemented for monitoring other social canids that emit chorus howls such as jackals or coyotes, provides an easy way to obtain information on ecological parameters such as reproductive success, and could be useful to study other group vocalizations.

  14. Dioctophyma renale in maned wolf in the geoeconomic region of Jatai, GO, Brazil - Case report

    Directory of Open Access Journals (Sweden)

    Valcinir Aloisio Scalla Vulcani

    2015-06-01

    Full Text Available ABSTRACT. Vulcani V.A.S., Franzo V.S., de Araújo D.P., Vicentin F.R., da Costa O.M., Rangel A.S. & Gomes L.A. [Dioctophyma renale in maned wolf in the geoeconomic region of Jatai, GO, Brazil - Case report.] Dioctophyma renale em Lobo-Guará na região geoeconômica de Jataí, GO, Brasil - Relato de caso. Revista Brasileira de Medicina Veterinária, 37(2:149-152, 2015. Laboratório de Anatomia, Curso de Medicina Veterinária, Universidade Federal de Goiás, Campus de Jataí, BR 364 Km 192, 3800, Setor Industrial, Jataí, GO 75801-615, Brasil. E-mail: aloisiosv@hotmail.com The maned Wolf (Chrysocyon brachyurus (Illiger, 1815 is the largest animal that represents the canidae species at the South America. The Dioctophyme renale (Goeze, 1782 known as the giant kidney-worm, because it is used to lodges mostly this organs, and it has been also responsible for the majority of captive animals deaths. A maned wolf necropsy was done at the animal anatomy laboratory of the Universidade Federal de Goiás (UFG - Campus Jataí and showed a nematode in the right kidney of the wild dog. This is the second confirmed case report of maned wolf that have free life in the city of Jataí and in State of Goiás, that suggests that is a common parasitism in this region of the country.

  15. Inflammatory Myofibroblastic Bladder Tumor in a Patient with Wolf-Hirschhorn Syndrome

    Directory of Open Access Journals (Sweden)

    Antonio Marte

    2013-01-01

    Full Text Available Inflammatory myofibroblastic tumor (IMT is a rare neoplasm described in several tissues and organs including genitourinary system, lung, head, and neck. The etiology of IMT is contentious, and whether it is a postinflammatory process or a true neoplasm remains controversial. To our knowledge, we report the first reported case of IMT of urinary bladder in a pediatric patient with Wolf-Hirschhorn (WHS. We also review the literature about patients with associated neoplasia.

  16. Kinematic adjustments during succesful and unsuccessful wolf jumps on the balance beam

    OpenAIRE

    Mauz, Danica; Jensen, Randall; Naundorf, Falk; Richter, Chris; Vieten, Manfred

    2013-01-01

    The current study examined differences in the kinematics between successful and failed landings of a wolf jump on the balance beam. Subjects were 35 elite level gymnasts performing in competition. Discrete point analysis and Analysis of Characterizing Phases found that failed landings involved higher initial longitudinal component of the inertia tensor, body angle in the anterior-posterior direction at takeoff and landing, and the medial-lateral component of angular velocity during the descen...

  17. Decoding Group Vocalizations: The Acoustic Energy Distribution of Chorus Howls Is Useful to Determine Wolf Reproduction

    Science.gov (United States)

    López-Bao, José Vicente; Llaneza, Luis; Fernández, Carlos; Font, Enrique

    2016-01-01

    Population monitoring is crucial for wildlife management and conservation. In the last few decades, wildlife researchers have increasingly applied bioacoustics tools to obtain information on several essential ecological parameters, such as distribution and abundance. One such application involves wolves (Canis lupus). These canids respond to simulated howls by emitting group vocalizations known as chorus howls. These responses to simulated howls reveal the presence of wolf litters during the breeding period and are therefore often used to determine the status of wolf populations. However, the acoustic structure of chorus howls is complex and discriminating the presence of pups in a chorus is sometimes difficult, even for experienced observers. In this study, we evaluate the usefulness of analyses of the acoustic energy distribution in chorus howls to identify the presence of pups in a chorus. We analysed 110 Iberian wolf chorus howls with known pack composition and found that the acoustic energy distribution is concentrated at higher frequencies when there are pups vocalizing. We built predictive models using acoustic energy distribution features to determine the presence of pups in a chorus, concluding that the acoustic energy distribution in chorus howls can be used to determine the presence of wolf pups in a pack. The method we outline here is objective, accurate, easily implemented, and independent of the observer's experience. These advantages are especially relevant in the case of broad scale surveys or when many observers are involved. Furthermore, the analysis of the acoustic energy distribution can be implemented for monitoring other social canids that emit chorus howls such as jackals or coyotes, provides an easy way to obtain information on ecological parameters such as reproductive success, and could be useful to study other group vocalizations. PMID:27144887

  18. Tribute to Emil Wolf: Science and Engineering Legacy of Physical Optics

    Science.gov (United States)

    2004-09-23

    1983; his Ph.D. research examined a novel nonimag - ing solar thermal collector with Prof. Roland Winston. While at NRL, Dr. Snail has published more...advanced illumination systems, sensors, and nonimaging optical devices. This SPIE Press book pays tribute to Emil Wolf (see Fig. 1) for his pio- neering...who described the effect of nonimage forming optical systems and scattering media in terms of the Mueller formalism; Edwin H. Land,† who invented the

  19. Path Tortuosity and the Permeability of Roads and Trails to Wolf Movement

    OpenAIRE

    Jesse Whittington; Colleen Cassady St. Clair; George Mercer

    2004-01-01

    Few studies have examined the effects of human development on fine-scale movement behavior, yet understanding animal movement through increasingly human-dominated landscapes is essential for the persistence of many wild populations, especially wary species. In mountainous areas, roads and trails may be particularly deserving of study because they are concentrated in the valley bottoms where they can impede animal movement both across and between valleys. In this study, we tracked wolf (Canis ...

  20. Habitat suitability and movement corridors of grey wolf (Canis lupus) in Northern Pakistan

    Science.gov (United States)

    Kabir, Muhammad; Hameed, Shoaib; Ali, Hussain; Bosso, Luciano; Din, Jaffar Ud; Bischof, Richard; Redpath, Steve

    2017-01-01

    Habitat suitability models are useful to understand species distribution and to guide management and conservation strategies. The grey wolf (Canis lupus) has been extirpated from most of its historic range in Pakistan primarily due to its impact on livestock and livelihoods. We used non-invasive survey data from camera traps and genetic sampling to develop a habitat suitability model for C. lupus in northern Pakistan and to explore the extent of connectivity among populations. We detected suitable habitat of grey wolf using a maximum entropy approach (Maxent ver. 3.4.0) and identified suitable movement corridors using the Circuitscape 4.0 tool. Our model showed high levels of predictive performances, as seen from the values of area under curve (0.971±0.002) and true skill statistics (0.886±0.021). The main predictors for habitat suitability for C. lupus were distances to road, mean temperature of the wettest quarter and distance to river. The model predicted ca. 23,129 km2 of suitable areas for wolf in Pakistan, with much of suitable habitat in remote and inaccessible areas that appeared to be well connected through vulnerable movement corridors. These movement corridors suggest that potentially the wolf range can expand in Pakistan’s Northern Areas. However, managing protected areas with stringent restrictions is challenging in northern Pakistan, in part due to heavy dependence of people on natural resources. The habitat suitability map provided by this study can inform future management strategies by helping authorities to identify key conservation areas. PMID:29121089

  1. Noninvasive molecular tracking of colonizing wolf (Canis lupus) packs in the western Italian Alps.

    Science.gov (United States)

    Lucchini, V; Fabbri, E; Marucco, F; Ricci, S; Boitani, L; Randi, E

    2002-05-01

    We used noninvasive methods to obtain genetic and demographic data on the wolf packs (Canis lupus), which are now recolonizing the Alps, a century after their eradication. DNA samples, extracted from presumed wolf scats collected in the western Italian Alps (Piemonte), were genotyped to determine species and sex by sequencing parts of the mitochondrial DNA (mtDNA) control-region and ZFX/ZFY genes. Individual genotypes were identified by multilocus microsatellite analyses using a multiple tubes polymerase chain reaction (PCR). The performance of the laboratory protocols was affected by the age of samples. The quality of excremental DNA extracts was higher in samples freshly collected on snow in winter than in samples that were older or collected during summer. Preliminary mtDNA screening of all samples allowed species identification and was a good predictor of further PCR performances. Wolf, and not prey, DNA targets were preferentially amplified. Allelic dropout occurred more frequently than false alleles, but the probability of false homozygote determinations was always wolf genotypes, also whether related, with a probability of identity of < 0.015. Genealogical relationships among individuals could be determined reliably if the number of candidate parents was 6-8, and most of them had been sampled and correctly genotyped. Genetic data indicate that colonizing Alpine wolves originate exclusively from the Italian source population and retain a high proportion of its genetic diversity. Spatial and temporal locations of individual genotypes, and kinship analyses, suggest that two distinct packs of closely related wolves, plus some unrelated individuals, ranged in the study areas. This is in agreement with field observations.

  2. A three-term conjugate gradient method under the strong-Wolfe line search

    Science.gov (United States)

    Khadijah, Wan; Rivaie, Mohd; Mamat, Mustafa

    2017-08-01

    Recently, numerous studies have been concerned in conjugate gradient methods for solving large-scale unconstrained optimization method. In this paper, a three-term conjugate gradient method is proposed for unconstrained optimization which always satisfies sufficient descent direction and namely as Three-Term Rivaie-Mustafa-Ismail-Leong (TTRMIL). Under standard conditions, TTRMIL method is proved to be globally convergent under strong-Wolfe line search. Finally, numerical results are provided for the purpose of comparison.

  3. Chemical composition and origin of the Wolf-Rayet ring Nebula NGC 6888

    International Nuclear Information System (INIS)

    Kwitter, K.B.

    1981-01-01

    We have obtained spectrophotometric observations of NGC 6888, a ring nebula surrounding the Population I Wolf-Rayet star HD 192163, in order to determine the physical conditions and chemical abundances in this object. We conclude that NGC 6888 is enriched in nitrogen and helium by factors of about 9 and 2, respectively, compared with the Orion Nebula. This enrichment is a result of contamination of the ambient abundances by the nigrogen-rich and helium-rich wind from the central Wolf-rayet star. We have interpreted NGC 6888 as an interstellar bubble, according to recent theory, and calculate an approximate age for the nebula of 18,000 years. The fraction of nebular mass contributed by the central star can be estimated from published stellar abundances; we calculate that the stellar wind has provided approx.10% of the observed nebular mass. If this nebula is representative, then the total mass contributed to a ring nebula by stellar wind is small (< or approx. =1M/sub sun/). This suggests that mass loss from stars in the Wolf-Rayet phase does not play a significant role in the nitrogen and helium enrichment of the interstellar medium

  4. Spectrum and light curve of a supernova shock breakout through a thick Wolf-Rayet wind

    Energy Technology Data Exchange (ETDEWEB)

    Svirski, Gilad; Nakar, Ehud, E-mail: swirskig@post.tau.ac.il [Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel)

    2014-06-20

    Wolf-Rayet stars are known to eject winds. Thus, when a Wolf-Rayet star explodes as a supernova, a fast (≳ 40, 000 km s{sup –1}) shock is expected to be driven through a wind. We study the signal expected from a fast supernova shock propagating through an optically thick wind and find that the electrons behind the shock driven into the wind are efficiently cooled by inverse Compton over soft photons that were deposited by the radiation-mediated shock that crossed the star. Therefore, the bolometric luminosity is comparable to the kinetic energy flux through the shock, and the spectrum is found to be a power law, whose slope and frequency range depend on the number flux of soft photons available for cooling. Wolf-Rayet supernovae that explode through a thick wind have a high flux of soft photons, producing a flat spectrum, νF {sub ν} = Const, in the X-ray range of 0.1 ≲ T ≲ 50 keV. As the shock expands into an optically thin wind, the soft photons are no longer able to cool the shock that plows through the wind, and the bulk of the emission takes the form of a standard core-collapse supernova (without a wind). However, a small fraction of the soft photons is upscattered by the shocked wind and produces a transient unique X-ray signature.

  5. Spectrum and light curve of a supernova shock breakout through a thick Wolf-Rayet wind

    International Nuclear Information System (INIS)

    Svirski, Gilad; Nakar, Ehud

    2014-01-01

    Wolf-Rayet stars are known to eject winds. Thus, when a Wolf-Rayet star explodes as a supernova, a fast (≳ 40, 000 km s –1 ) shock is expected to be driven through a wind. We study the signal expected from a fast supernova shock propagating through an optically thick wind and find that the electrons behind the shock driven into the wind are efficiently cooled by inverse Compton over soft photons that were deposited by the radiation-mediated shock that crossed the star. Therefore, the bolometric luminosity is comparable to the kinetic energy flux through the shock, and the spectrum is found to be a power law, whose slope and frequency range depend on the number flux of soft photons available for cooling. Wolf-Rayet supernovae that explode through a thick wind have a high flux of soft photons, producing a flat spectrum, νF ν = Const, in the X-ray range of 0.1 ≲ T ≲ 50 keV. As the shock expands into an optically thin wind, the soft photons are no longer able to cool the shock that plows through the wind, and the bulk of the emission takes the form of a standard core-collapse supernova (without a wind). However, a small fraction of the soft photons is upscattered by the shocked wind and produces a transient unique X-ray signature.

  6. THE PROPAGATION OF NEUTRINO-DRIVEN JETS IN WOLF-RAYET STARS

    Energy Technology Data Exchange (ETDEWEB)

    Nagakura, Hiroki, E-mail: hiroki@heap.phys.waseda.ac.jp [Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, JapanAND (Japan); Advanced Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555 (Japan)

    2013-02-20

    We numerically investigate the jet propagation through a rotating collapsing Wolf-Rayet star with detailed central engine physics constructed based on the neutrino-driven collapsar model. The collapsing star determines the evolution of the mass accretion rate, black hole mass, and spin, all of which are important ingredients for determining the jet luminosity. We reveal that neutrino-driven jets in rapidly spinning Wolf-Rayet stars are capable of breaking out from the stellar envelope, while those propagating in slower rotating progenitors fail to break out due to insufficient kinetic power. For progenitor models with successful jet breakouts, the kinetic energy accumulated in the cocoon could be as large as {approx}10{sup 51} erg and might significantly contribute to the luminosity of the afterglow emission or to the kinetic energy of the accompanying supernova if nickel production takes place. We further analyze the post-breakout phase using a simple analytical prescription and conclude that the relativistic jet component could produce events with an isotropic luminosity L {sub p(iso)} {approx} 10{sup 52} erg s{sup -1} and isotropic energy E {sub j(iso)} {approx} 10{sup 54} erg. Our findings support the idea of rapidly rotating Wolf-Rayet stars as plausible progenitors of GRBs, while slowly rotational ones could be responsible for low-luminosity or failed GRBs.

  7. Genetic variability in maned wolf based on heterologous short-tandem repeat markers from domestic dog.

    Science.gov (United States)

    Salim, D C; Akimoto, A A; Carvalho, C B; Oliveira, S F; Grisolia, C K; Moreira, J R; Klautau-Guimarães, M N

    2007-06-20

    The maned wolf (Chrysocyon brachyurus) is the largest South American canid. Habitat loss and fragmentation, due to agricultural expansion and predatory hunting, are the main threats to this species. It is included in the official list of threatened wildlife species in Brazil, and is also protected by IUCN and CITES. Highly variable genetic markers such as microsatellites have the potential to resolve genetic relationships at all levels of the population structure (among individuals, demes or metapopulations) and also to identify the evolutionary unit for strategies for the conservation of the species. Tests were carried out to verify whether a class of highly polymorphic tetranucleotide repeats described for the domestic dog effectively amplifies DNA in the maned wolf. All five loci studied were amplified; however, one of these, was shown to be monomorphic in 69 maned wolf samples. The average allele number and estimated heterozygosity per polymorphic locus were 4.3 and 67%, respectively. The genetic variability found for this species, which is considered threatened with extinction, showed similar results when compared to studies of other canids.

  8. MANDIBULAR MORPHOMETRY APPLIED TO ANESTHETIC BLOCKAGE IN THE MANED WOLF (CHRYSOCYON BRACHYURUS).

    Science.gov (United States)

    de Souza Junior, Paulo; de Moraes, Flavio Machado; de Carvalho, Natan da Cruz; Canelo, Evandro Alves; Thiesen, Roberto; Santos, André Luiz Quagliatto

    2016-03-01

    Chrysocyon brachyurus (maned wolf) is the biggest South American canid and has a high frequency of dental injuries, both in the wild and in captivity. Thus, veterinary procedures are necessary to preserve the feeding capacity of hundreds of captive specimens worldwide. The aim of this study was to investigate the mandibular morphometry of the maned wolf with emphasis on the establishment of anatomic references for anesthetic block of the inferior alveolar and mental nerves. Therefore, 16 measurements in 22 mandibles of C. brachyurus adults were taken. For extraoral block of the inferior alveolar nerve at the level of the mandibular foramen, the needle should be advanced close to the medial face of the mandibular ramus for 11.4 mm perpendicular to the palpable concavity. In another extraoral approach, the needle may be introduced for 30.4 mm from the angular process at a 20-25° angle to the ventral margin. For blocking only the mental nerve, the needle should be inserted for 10 mm from ventral border, close to the labial surface of the mandibular body, at the level of the lower first premolar. The mandibular foramen showed similar position, size, and symmetry in the maned wolf specimens examined. Comparison of the data observed here with those available for other carnivores indicates the need to determine these anatomic references specifically for each species.

  9. The Gender of Authorship: Heiner Müller and Christa Wolf

    Directory of Open Access Journals (Sweden)

    Helen Fehervary

    1980-09-01

    Full Text Available The relationship between sexuality and politics has always been an underlying assumption of the avant-garde. In recent East German avant-garde literature, the notion of authorship as production has become associated with technological rationality and the patriarchal socialist state. The ensuing crisis of the traditional male author has thus led necessarily to a radicalization of subjectivity and to the politics of gender. A comparison of two contemporary texts, one by a female author, one by a male, shows that the crisis of authorship assumes two distinctly different forms when differences in gender are taken into account. The East German authors Heiner Müller and Christa Wolf have exhibited remarkably similar literary and political developments. Two of their most recent texts, Mülller's Hamletmachine and Wolf's No Place. Nowhere , both address the problematic of traditional male authorship and the disintegration of a preconceived literary gender identity. Yet, these two texts exemplify very different assumptions about the relationship between authorship and the literary tradition. Müller's text suggests the imprisonment of the male author within a petrified system of tradition and images, and hence the necessity of deconstruction. Wolf's text manifests a process of creating a new form of female-identified authorship and the possibility of redefining the tradition of literature and its future.

  10. A fresh look at the wolf-pack theory of companion-animal dog social behavior.

    Science.gov (United States)

    van Kerkhove, Wendy

    2004-01-01

    A popular perspective on the social behavior of dogs in multiple-dog households sees the dogs' behavior as reflecting the sociobiological laws of the rigidly structured dominance hierarchy that has been described for wolf packs. This view suggests that aggression problems among dogs are natural expressions of conflict that arise whenever dominance status is in contention. One recommended solution has been for the owner to endorse and enforce a particular dominance hierarchy because, on the wolf pack model, aggression is minimized when the structure of the hierarchy is clear, strong, and stable. This article questions the validity of this perspective on 2 principal grounds. First, because it does not seem to occur in the wild, this article suggests the strong dominance hierarchy that has been described for wolves may be a by-product of captivity. If true, it implies that social behavior--even in wolves--may be a product more of environmental circumstances and contingencies than an instinctive directive. Second, because feral dogs do not exhibit the classic wolf-pack structure, the validity of the canid, social dominance hierarchy again comes into question. This article suggests that behavioral learning theory offers another perspective regarding the behavior of dogs and wolves in the wild or in captivity and offers an effective intervention for aggression problems.

  11. A chaos wolf optimization algorithm with self-adaptive variable step-size

    Directory of Open Access Journals (Sweden)

    Yong Zhu

    2017-10-01

    Full Text Available To explore the problem of parameter optimization for complex nonlinear function, a chaos wolf optimization algorithm (CWOA with self-adaptive variable step-size was proposed. The algorithm was based on the swarm intelligence of wolf pack, which fully simulated the predation behavior and prey distribution way of wolves. It possessed three intelligent behaviors such as migration, summons and siege. And the competition rule as “winner-take-all” and the update mechanism as “survival of the fittest” were also the characteristics of the algorithm. Moreover, it combined the strategies of self-adaptive variable step-size search and chaos optimization. The CWOA was utilized in parameter optimization of twelve typical and complex nonlinear functions. And the obtained results were compared with many existing algorithms, including the classical genetic algorithm, the particle swarm optimization algorithm and the leader wolf pack search algorithm. The investigation results indicate that CWOA possess preferable optimization ability. There are advantages in optimization accuracy and convergence rate. Furthermore, it demonstrates high robustness and global searching ability.

  12. Winter wolf predation in a multiple ungulate prey system, Gates of the Arctic National Park, Alaska

    Science.gov (United States)

    Dale, Bruce W.; Adams, Layne G.; Bowyer, R. Terry; Carbyn, Ludwig N.; Fritts, Steven H.; Seip, Dale R.

    1995-01-01

    We investigated patterns of winter wolf predation, including prey selection, prey switching, kill rates, carcass utilization, and consumption rates for four wolf packs during three different study periods (March 1989, March 1990, and November 1990) in Gates of the Arctic National Park and Preserve, Alaska. Wolves killed predominantly caribou (165 caribou, seven moose, and five Dall sheep) even when moose and sheep were more abundant. Prey selection varied between study periods. More moose were killed in march 1989, a particularly deep snow year, and more sheep were killed in November 1990 than during other periods. Overall kill rates ranged from 0-8 days/ungulate killed (x̅ = 2.0, SD = 1.6) and did not vary between study periods.  Pack size and species killed explained significant variation in the length of time intervals between kills. Although caribou density varied nearly 40-fold between pack territories, it had little influence on predation characteristics except at low densities, when kill rates may have declined. Caribou distribution had marked effects on wolf predation rate.

  13. Community Resource Uses and Ethiopian Wolf Conservation in Mount Abune Yosef

    Science.gov (United States)

    Eshete, Girma; Tesfay, Girmay; Bauer, Hans; Ashenafi, Zelealem Tefera; de Iongh, Hans; Marino, Jorgelina

    2015-09-01

    People who perceive economic benefits and enjoy unrestricted access to natural resources tend to support ecosystem conservation efforts. Our study explores whether this remains true in remnant patches of Afroalpine ecosystem in North Ethiopia, where communal land provides valuable natural resources for the local communities and also sustain small populations of the endangered Ethiopian wolf ( Canis simensis). Questionnaires were designed to assess ecological and socio-economic characteristics of the livelihoods of the Amhara people living in Mount Abune Yosef and their attitudes toward Afroalpine and Ethiopian wolf conservation. Of the 120 households interviewed, selected randomly from across eight villages, 80 % benefited from natural resources by grazing their livestock and harvesting firewood and grasses. The majority (90 %) also suffered from livestock predation by Ethiopian wolves and common jackals (Canis aureus) and crop raiding by geladas ( Theropithecus gelada), birds, and rodents, yet more than half reported a positive attitudes toward Ethiopian wolves (66 %). People with positive attitudes tended to live close to the communal land, to own more livestock, and to be unaffected by conflict. Many also recognized the need to protect the Afroalpine habitats of Abune Yosef (71 %), and this attitude predominated among the literate, households that owned land, had smaller herds and were further away. We discussed how people's attitudes were modulated by human-wildlife conflicts and by the benefits derived from the access to natural resources in communal land, and the implications for the conservation of Afroalpine ecosystem and the flagship Ethiopian wolf.

  14. Red Wolf (Canis rufus Recovery: A Review with Suggestions for Future Research

    Directory of Open Access Journals (Sweden)

    Michael J. Chamberlain

    2013-08-01

    Full Text Available By the 1970s, government-supported eradication campaigns reduced red wolves to a remnant population of less than 100 individuals on the southern border of Texas and Louisiana. Restoration efforts in the region were deemed unpromising because of predator-control programs and hybridization with coyotes. The U.S. Fish and Wildlife Service (USFWS removed the last remaining red wolves from the wild and placed them in a captive-breeding program. In 1980, the USFWS declared red wolves extinct in the wild. During 1987, the USFWS, through the Red Wolf Recovery Program, reintroduced red wolves into northeastern North Carolina. Although restoration efforts have established a population of approximately 70–80 red wolves in the wild, issues of hybridization with coyotes, inbreeding, and human-caused mortality continue to hamper red wolf recovery. We explore these three challenges and, within each challenge, we illustrate how research can be used to resolve problems associated with red wolf-coyote interactions, effects of inbreeding, and demographic responses to human-caused mortality. We hope this illustrates the utility of research to advance restoration of red wolves.

  15. A chaos wolf optimization algorithm with self-adaptive variable step-size

    Science.gov (United States)

    Zhu, Yong; Jiang, Wanlu; Kong, Xiangdong; Quan, Lingxiao; Zhang, Yongshun

    2017-10-01

    To explore the problem of parameter optimization for complex nonlinear function, a chaos wolf optimization algorithm (CWOA) with self-adaptive variable step-size was proposed. The algorithm was based on the swarm intelligence of wolf pack, which fully simulated the predation behavior and prey distribution way of wolves. It possessed three intelligent behaviors such as migration, summons and siege. And the competition rule as "winner-take-all" and the update mechanism as "survival of the fittest" were also the characteristics of the algorithm. Moreover, it combined the strategies of self-adaptive variable step-size search and chaos optimization. The CWOA was utilized in parameter optimization of twelve typical and complex nonlinear functions. And the obtained results were compared with many existing algorithms, including the classical genetic algorithm, the particle swarm optimization algorithm and the leader wolf pack search algorithm. The investigation results indicate that CWOA possess preferable optimization ability. There are advantages in optimization accuracy and convergence rate. Furthermore, it demonstrates high robustness and global searching ability.

  16. Temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from the NATHANIEL B. PALMER in the South Pacific Ocean from 1994-02-14 to 1994-04-05 (NODC Accession 0116067)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0116067 includes chemical, discrete sample, physical and profile data collected from NATHANIEL B. PALMER in the South Pacific Ocean from 1994-02-14 to...

  17. Temperature, salinity and other variables collected from discrete sample and profile observations using CTD, PAR Sensor and other instruments from the NATHANIEL B. PALMER in the Arctic Ocean, Beaufort Sea and Bering Sea from 2003-07-05 to 2003-08-20 (NODC Accession 0116064)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0116064 includes biological, chemical, discrete sample, physical and profile data collected from NATHANIEL B. PALMER in the Arctic Ocean, Beaufort Sea...

  18. Temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from the NATHANIEL B. PALMER in the South Pacific Ocean from 2000-02-15 to 2000-03-24 (NODC Accession 0116066)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0116066 includes chemical, discrete sample, physical and profile data collected from NATHANIEL B. PALMER in the South Pacific Ocean from 2000-02-15 to...

  19. Partial pressure (or fugacity) of carbon dioxide, temperature, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, PAR Sensor and other instruments from NATHANIEL B. PALMER in the South Pacific Ocean and Southern Oceans from 1997-11-25 to 1997-12-08 (NCEI Accession 0157301)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157301 includes Surface underway, biological, chemical, optical and physical data collected from NATHANIEL B. PALMER in the South Pacific Ocean and...

  20. Partial pressure (or fugacity) of carbon dioxide, dissolved inorganic carbon, pH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from NATHANIEL B. PALMER in the South Pacific Ocean, Southern Oceans and Tasman Sea from 2014-03-20 to 2014-05-05 (NCEI Accession 0157621)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157621 includes chemical, discrete sample, meteorological, optical, physical and profile data collected from NATHANIEL B. PALMER in the South Pacific...

  1. Temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from the NATHANIEL B. PALMER in the South Pacific Ocean from 1996-08-30 to 1996-09-24 (NODC Accession 0116063)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0116063 includes chemical, discrete sample, physical and profile data collected from NATHANIEL B. PALMER in the South Pacific Ocean from 1996-08-30 to...

  2. Bacteria, plankton, and trace metal, and other data from bottle and CTD casts in the Antarctic from the NATHANIEL B. PALMER and ROGER REVELL in support of the US Joint Global Ocean Flux Study / Antarctic Environments Southern Ocean Process Study (JGOFS /AESOPS) from 1996-10-17 to 1998-03-15 (NODC Accession 0000504)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Phytoplankton and other data were collected in the Antarctic from the NATHANIEL B. PALMER and ROGER REVELL from 17 October 1996 to 15 March 1998. Bottle data include...

  3. Dissolved inorganic carbon, pH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from the NATHANIEL B. PALMER in the South Pacific Ocean from 1997-04-04 to 1997-05-12 (NODC Accession 0116065)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0116065 includes chemical, discrete sample, physical and profile data collected from NATHANIEL B. PALMER in the South Pacific Ocean from 1997-04-04 to...

  4. Partial pressure (or fugacity) of carbon dioxide, dissolved inorganic carbon, pH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using Alkalinity titrator, CTD and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2011-02-19 to 2011-04-23 (NODC Accession 0109933)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0109933 includes discrete sample and profile data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern...

  5. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Indian Ocean, South Pacific Ocean and others from 1995-03-17 to 1995-04-27 (NCEI Accession 0157358)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157358 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Indian Ocean, South Pacific...

  6. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer and other instruments from NATHANIEL B. PALMER in the South Pacific Ocean from 2015-12-06 to 2016-01-02 (NCEI Accession 0157474)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157474 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Pacific Ocean from...

  7. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic Ocean and others from 2001-01-30 to 2002-01-13 (NCEI Accession 0157365)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157365 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic...

  8. Partial pressure (or fugacity) of carbon dioxide, dissolved inorganic carbon, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from the NATHANIEL B. PALMER in the Indian Ocean from 1996-05-03 to 1996-07-04 (NODC Accession 0115151)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0115151 includes chemical, discrete sample, physical and profile data collected from NATHANIEL B. PALMER in the Indian Ocean from 1996-05-03 to...

  9. Partial pressure (or fugacity) of carbon dioxide, salinity and SEA SURFACE TEMPERATURE collected from underway - surface observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from the NATHANIEL B. PALMER in the Arctic Ocean, Beaufort Sea and others from 1994-11-04 to 2012-08-31 (NODC Accession 0083189)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0083189 includes chemical, physical and underway - surface data collected from NATHANIEL B. PALMER in the Arctic Ocean, Beaufort Sea, Bering Sea,...

  10. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic Ocean and others from 2004-01-20 to 2005-01-25 (NCEI Accession 0157327)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157327 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic...

  11. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Pacific Ocean, Southern Oceans and Tasman Sea from 1997-01-12 to 1998-01-09 (NCEI Accession 0157323)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157323 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Pacific Ocean, Southern...

  12. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Arctic Ocean, Beaufort Sea and others from 2003-01-05 to 2004-01-15 (NCEI Accession 0157387)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157387 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Arctic Ocean, Beaufort Sea,...

  13. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Indian Ocean, North Pacific Ocean and others from 2000-02-15 to 2001-01-25 (NCEI Accession 0157250)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157250 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Indian Ocean, North Pacific...

  14. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic Ocean and others from 2013-11-18 to 2014-12-25 (NCEI Accession 0157374)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157374 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic...

  15. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic Ocean and others from 1996-05-04 to 1997-01-08 (NCEI Accession 0157413)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157413 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic...

  16. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the North Pacific Ocean, South Atlantic Ocean and others from 2002-01-18 to 2003-01-01 (NCEI Accession 0157376)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157376 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the North Pacific Ocean, South...

  17. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic Ocean and others from 2015-01-04 to 2015-10-18 (NCEI Accession 0157344)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157344 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Indian Ocean, South Atlantic...

  18. Partial pressure (or fugacity) of carbon dioxide, dissolved inorganic carbon, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from the NATHANIEL B. PALMER in the South Pacific Ocean from 1997-01-13 to 1997-02-11 (NODC Accession 0116069)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0116069 includes chemical, discrete sample, physical and profile data collected from NATHANIEL B. PALMER in the South Pacific Ocean from 1997-01-13 to...

  19. Wolf presence and increased willow consumption by Yellowstone elk: implications for trophic cascades.

    Science.gov (United States)

    Creel, Scott; Christianson, David

    2009-09-01

    Recent increases in the height and growth ring width of willow (Salix spp.) and other woody plants in the Greater Yellowstone Ecosystem (GYE) have been attributed to a behaviorally mediated trophic cascade from wolves (Canis lupus) to elk (Cervus elaphus) to willows. This hypothesis predicts that individual elk consume less willow in response to the presence of wolves, but this prediction has not been directly tested with data from elk. We collected 727 fecal samples from elk in the Gallatin Canyon portion of the GYE over three winters and used microhistological methods to quantify the proportion of willow in each sample. We then tested the effect of wolf presence on willow consumption by elk, controlling for the effects of snow conditions, sex, and habitat type. During the period of study, 8-17 wolves occupied the study area, and wolves were locally present on 49% of 260 sampling days, stratified at two-week intervals across three drainages. Over the three years combined, willow consumption was related to snow conditions, wolf presence, and a wolf X sex interaction. As expected, willow consumption increased with deeper and less penetrable snow, and this effect was strong. Contrary to expectation, willow consumption increased in the presence of wolves. As with other aspects of antipredator behavior, wolves had different effects on willow consumption by males and females. Finally, we aggregated the data to estimate winter-long mean willow consumption within each drainage; at this broader scale, willow consumption again increased as predation risk increased. In summary, willow consumption was more strongly affected by snow conditions than by the presence of wolves. Interactions between elk and willow were affected by wolves, but not as predicted by the hypothesis that wolf presence favors willow release through a reduction in the selection of willow by individual elk. If a trophic cascade is operating, our results suggest that a decline in the size of the elk

  20. Elk migration patterns and human activity influence wolf habitat use in the Greater Yellowstone Ecosystem

    Science.gov (United States)

    Nelson, Abigail; Kauffman, Matthew J.; Middleton, Arthur D.; Jimenez, Mike; McWhirter, Douglas; Barber, Jarrett; Gerow, Ken

    2012-01-01

    Identifying the ecological dynamics underlying human–wildlife conflicts is important for the management and conservation of wildlife populations. In landscapes still occupied by large carnivores, many ungulate prey species migrate seasonally, yet little empirical research has explored the relationship between carnivore distribution and ungulate migration strategy. In this study, we evaluate the influence of elk (Cervus elaphus) distribution and other landscape features on wolf (Canis lupus) habitat use in an area of chronic wolf–livestock conflict in the Greater Yellowstone Ecosystem, USA. Using three years of fine-scale wolf (n = 14) and elk (n = 81) movement data, we compared the seasonal habitat use of wolves in an area dominated by migratory elk with that of wolves in an adjacent area dominated by resident elk. Most migratory elk vacate the associated winter wolf territories each summer via a 40–60 km migration, whereas resident elk remain accessible to wolves year-round. We used a generalized linear model to compare the relative probability of wolf use as a function of GIS-based habitat covariates in the migratory and resident elk areas. Although wolves in both areas used elk-rich habitat all year, elk density in summer had a weaker influence on the habitat use of wolves in the migratory elk area than the resident elk area. Wolves employed a number of alternative strategies to cope with the departure of migratory elk. Wolves in the two areas also differed in their disposition toward roads. In winter, wolves in the migratory elk area used habitat close to roads, while wolves in the resident elk area avoided roads. In summer, wolves in the migratory elk area were indifferent to roads, while wolves in resident elk areas strongly avoided roads, presumably due to the location of dens and summering elk combined with different traffic levels. Study results can help wildlife managers to anticipate the movements and establishment of wolf packs as they expand into

  1. Avaliação da qualidade de manga 'palmer' tratada com 1-metilciclopropeno e armazenada sob refrigeração e condição ambiente Evaluation of quality of 'palmer' mangoes fruit treated with 1-methylcyclopropene and stored under refrigeration and environmental conditions

    Directory of Open Access Journals (Sweden)

    Ellen Toews Dollhojo

    2009-03-01

    Full Text Available O objetivo deste trabalho foi verificar a qualidade de mangas da cv. Palmer tratadas com 1-metilciclopropeno (1-MCP mantidas sob armazenamento refrigerado e sob armazenamento refrigerado associado à exposição à temperatura ambiente por quatro dias. O delineamento experimental foi inteiramente casualizado, em fatorial 3 x 6, sendo 3 níveis do fator dose de 1-MCP (0 -testemunha, 100 nL.L-1 e 150 nL.L-1 e 6 níveis do fator tempo de armazenamento (0; 7; 14; 21; 28 e 35 dias de armazenamento refrigerado, no experimento 1, e 0; 7 + 4; 14 + 4; 21 + 4; 28 + 4 e 35 dias de armazenamento refrigerado + 4 dias sob condição ambiente, no experimento 2, com 3 repetições. Cada parcela experimental foi composta por 2 frutos. O uso de 1-MCP em mangas 'Palmer' mantidas sob refrigeração reduz as perdas de massa e ácido ascórbico, retardando, mas não impedindo o amadurecimento. O tratamento com 150 nL.L-1 não é mais eficiente que o com 100 nL.L-1, pelas características químicas analisadas. As mangas 'Palmer' expostas à condição ambiente por quatro dias apresentam expressivo murchamento e perda de qualidade, com base nas análises de sólidos solúveis, açúcares solúveis e acidez titulável.The objective of this work was to verify the behavior of mangoes cv. Palmer treated with 1-methylcyclopropene (1-MCP stored under refrigeration and under refrigeration associate in exposure for four days at room temperature. The experiment was carried out in a completely randomly design, 3 x 6 factorial, with 3 levels of the factor concentration of 1-methylcyclopropene (0 nL.L-1- witness, 100 nL.L-1 and 150 nL.L-1 and 6 levels of the factor period of storage (0, 7, 14, 21, 28 and 35 days of cool storage, on the set up 1, and 0, 7 + 4, 14 + 4, 21 + 4, 28 + 4 and 35 days of cool storage + 4 days of room storage, on the set up 2, with 3 replicates. The experimental units were built up with 2 fruits. The use of 1-methylcyclopropene on the fruit kept under

  2. Wolf population genetics in Europe: a systematic review, meta-analysis and suggestions for conservation and management.

    Science.gov (United States)

    Hindrikson, Maris; Remm, Jaanus; Pilot, Malgorzata; Godinho, Raquel; Stronen, Astrid Vik; Baltrūnaité, Laima; Czarnomska, Sylwia D; Leonard, Jennifer A; Randi, Ettore; Nowak, Carsten; Åkesson, Mikael; López-Bao, José Vicente; Álvares, Francisco; Llaneza, Luis; Echegaray, Jorge; Vilà, Carles; Ozolins, Janis; Rungis, Dainis; Aspi, Jouni; Paule, Ladislav; Skrbinšek, Tomaž; Saarma, Urmas

    2017-08-01

    The grey wolf (Canis lupus) is an iconic large carnivore that has increasingly been recognized as an apex predator with intrinsic value and a keystone species. However, wolves have also long represented a primary source of human-carnivore conflict, which has led to long-term persecution of wolves, resulting in a significant decrease in their numbers, genetic diversity and gene flow between populations. For more effective protection and management of wolf populations in Europe, robust scientific evidence is crucial. This review serves as an analytical summary of the main findings from wolf population genetic studies in Europe, covering major studies from the 'pre-genomic era' and the first insights of the 'genomics era'. We analyse, summarize and discuss findings derived from analyses of three compartments of the mammalian genome with different inheritance modes: maternal (mitochondrial DNA), paternal (Y chromosome) and biparental [autosomal microsatellites and single nucleotide polymorphisms (SNPs)]. To describe large-scale trends and patterns of genetic variation in European wolf populations, we conducted a meta-analysis based on the results of previous microsatellite studies and also included new data, covering all 19 European countries for which wolf genetic information is available: Norway, Sweden, Finland, Estonia, Latvia, Lithuania, Poland, Czech Republic, Slovakia, Germany, Belarus, Russia, Italy, Croatia, Bulgaria, Bosnia and Herzegovina, Greece, Spain and Portugal. We compared different indices of genetic diversity in wolf populations and found a significant spatial trend in heterozygosity across Europe from south-west (lowest genetic diversity) to north-east (highest). The range of spatial autocorrelation calculated on the basis of three characteristics of genetic diversity was 650-850 km, suggesting that the genetic diversity of a given wolf population can be influenced by populations up to 850 km away. As an important outcome of this synthesis, we

  3. Gray wolf exposure to emerging vector-borne diseases in Wisconsin with comparison to domestic dogs and humans

    Science.gov (United States)

    Jara, Rocio F.; Wydeven, Adrian P.; Samuel, Michael D.

    2016-01-01

    World-wide concern over emerging vector-borne diseases has increased in recent years for both animal and human health. In the United Sates, concern about vector-borne diseases in canines has focused on Lyme disease, anaplasmosis, ehrlichiosis, and heartworm which infect domestic and wild canids. Of these diseases, Lyme and anaplasmosis are also frequently diagnosed in humans. Gray wolves (Canis lupus) recolonized Wisconsin in the 1970s, and we evaluated their temporal and geographic patterns of exposure to these four vector-borne diseases in Wisconsin as the population expanded between 1985 and 2011. A high proportion of the Wisconsin wolves were exposed to the agents that cause Lyme (65.6%) and anaplasma (47.7%), and a smaller proportion to ehrlichiosis (5.7%) and infected with heartworm (9.2%). Wolf exposure to tick borne diseases was consistently higher in older animals. Wolf exposure was markedly higher than domestic dog (Canis familiaris) exposure for all 4 disease agents during 2001–2013. We found a cluster of wolf exposure to Borrelia burgdorferi in northwestern Wisconsin, which overlaps human and domestic dog clusters for the same pathogen. In addition, wolf exposure to Lyme disease in Wisconsin has increased, corresponding with the increasing human incidence of Lyme disease in a similar time period. Despite generally high prevalence of exposure none of these diseases appear to have slowed the growth of the Wisconsin wolf population.

  4. Gray Wolf Exposure to Emerging Vector-Borne Diseases in Wisconsin with Comparison to Domestic Dogs and Humans.

    Directory of Open Access Journals (Sweden)

    Rocio F Jara

    Full Text Available World-wide concern over emerging vector-borne diseases has increased in recent years for both animal and human health. In the United Sates, concern about vector-borne diseases in canines has focused on Lyme disease, anaplasmosis, ehrlichiosis, and heartworm which infect domestic and wild canids. Of these diseases, Lyme and anaplasmosis are also frequently diagnosed in humans. Gray wolves (Canis lupus recolonized Wisconsin in the 1970s, and we evaluated their temporal and geographic patterns of exposure to these four vector-borne diseases in Wisconsin as the population expanded between 1985 and 2011. A high proportion of the Wisconsin wolves were exposed to the agents that cause Lyme (65.6% and anaplasma (47.7%, and a smaller proportion to ehrlichiosis (5.7% and infected with heartworm (9.2%. Wolf exposure to tick borne diseases was consistently higher in older animals. Wolf exposure was markedly higher than domestic dog (Canis familiaris exposure for all 4 disease agents during 2001-2013. We found a cluster of wolf exposure to Borrelia burgdorferi in northwestern Wisconsin, which overlaps human and domestic dog clusters for the same pathogen. In addition, wolf exposure to Lyme disease in Wisconsin has increased, corresponding with the increasing human incidence of Lyme disease in a similar time period. Despite generally high prevalence of exposure none of these diseases appear to have slowed the growth of the Wisconsin wolf population.

  5. Bucking the trend in wolf-dog hybridization: first evidence from europe of hybridization between female dogs and male wolves.

    Science.gov (United States)

    Hindrikson, Maris; Männil, Peep; Ozolins, Janis; Krzywinski, Andrzej; Saarma, Urmas

    2012-01-01

    Studies on hybridization have proved critical for understanding key evolutionary processes such as speciation and adaptation. However, from the perspective of conservation, hybridization poses a concern, as it can threaten the integrity and fitness of many wild species, including canids. As a result of habitat fragmentation and extensive hunting pressure, gray wolf (Canis lupus) populations have declined dramatically in Europe and elsewhere during recent centuries. Small and fragmented populations have persisted, but often only in the presence of large numbers of dogs, which increase the potential for hybridization and introgression to deleteriously affect wolf populations. Here, we demonstrate hybridization between wolf and dog populations in Estonia and Latvia, and the role of both genders in the hybridization process, using combined analysis of maternal, paternal and biparental genetic markers. Eight animals exhibiting unusual external characteristics for wolves - six from Estonia and two from Latvia - proved to be wolf-dog hybrids. However, one of the hybridization events was extraordinary. Previous field observations and genetic studies have indicated that mating between wolves and dogs is sexually asymmetrical, occurring predominantly between female wolves and male dogs. While this was also the case among the Estonian hybrids, our data revealed the existence of dog mitochondrial genomes in the Latvian hybrids and, together with Y chromosome and autosomal microsatellite data, thus provided the first evidence from Europe of mating between male wolves and female dogs. We discuss patterns of sexual asymmetry in wolf-dog hybridization.

  6. The 2015 Wolf volcano (Galápagos) eruption studied using Sentinel-1 and ALOS-2 data

    KAUST Repository

    Xu, Wenbin; Jonsson, Sigurjon; Ruch, Joel; Aoki, Yosuke

    2016-01-01

    An energetic eruption started on 25 May 2015 from a circumferential fissure at the summit of Wolf volcano on Isabela Island, western Galápagos. Further eruptive activity within the Wolf caldera followed in mid-June 2015. As no geodetic observations of earlier eruptions at Wolf exist, this eruption provides an opportunity to study the volcano's magmatic plumbing system for the first time. Here we use interferometric synthetic aperture radar (InSAR) data from both the Sentinel-1A and ALOS-2 satellites to map and analyze the surface deformation at four time periods during the activity. These data allow us to identify the two eruption phases and reveal strong coeruptive subsidence within the Wolf caldera that is superimposed on a larger volcano-wide subsidence signal. Modeling of the surface displacements shows that two shallow magma reservoirs located under Wolf at ~1 km and ~5 km below sea level explain the subsidence and that these reservoirs appear to be hydraulically connected. We also suggest that the transition from the circumferential to the intracaldera eruption may have involved ring fault activity.

  7. The 2015 Wolf volcano (Galápagos) eruption studied using Sentinel-1 and ALOS-2 data

    KAUST Repository

    Xu, Wenbin

    2016-09-28

    An energetic eruption started on 25 May 2015 from a circumferential fissure at the summit of Wolf volcano on Isabela Island, western Galápagos. Further eruptive activity within the Wolf caldera followed in mid-June 2015. As no geodetic observations of earlier eruptions at Wolf exist, this eruption provides an opportunity to study the volcano\\'s magmatic plumbing system for the first time. Here we use interferometric synthetic aperture radar (InSAR) data from both the Sentinel-1A and ALOS-2 satellites to map and analyze the surface deformation at four time periods during the activity. These data allow us to identify the two eruption phases and reveal strong coeruptive subsidence within the Wolf caldera that is superimposed on a larger volcano-wide subsidence signal. Modeling of the surface displacements shows that two shallow magma reservoirs located under Wolf at ~1 km and ~5 km below sea level explain the subsidence and that these reservoirs appear to be hydraulically connected. We also suggest that the transition from the circumferential to the intracaldera eruption may have involved ring fault activity.

  8. Constraints on gamma-ray burst and supernova progenitors through circumstellar absorption lines : II. Post-LBV Wolf-Rayet stars

    NARCIS (Netherlands)

    Marle, A.J.; Langer, N.; Garcia-Segura, G.

    2007-01-01

    Van Marle et al. (2005) showed that circumstellar absorption lines in early Type Ib/c supernova and gamma-ray burst afterglow spectra may reveal the progenitor evolution of the exploding Wolf-Rayet star. While the quoted paper deals with Wolf-Rayet stars which evolved through a red supergiant stage,

  9. Use of erroneous wolf generation time in assessments of domestic dog and human evolution

    Science.gov (United States)

    Mech, L. David; Barber-Meyer, Shannon

    2017-01-01

    Scientific interest in dog domestication and parallel evolution of dogs and humans (Wang et al. 2013) has increased recently (Freedman et al. 2014, Larson and Bradley 2014, Franz et al. 2016,), and various important conclusions have been drawn based on how long ago the calculations show dogs were domesticated from ancestral wolves (Canis lupus). Calculation of this duration is based on “the most commonly assumed mutation rate of 1 x 10-8 per generation and a 3-year gray wolf generation time . . .” (Skoglund et al. 2015:3). It is unclear on what information the assumed generation time is based, but Ersmark et al. (2016) seemed to have based their assumption on a single wolf (Mech and Seal 1987). The importance of assuring that such assumptions are valid is obvious. Recently, two independent studies employing three large data sets and three methods from two widely separated areas have found that wolf generation time is 4.2-4.7 years. The first study, based on 200 wolves in Yellowstone National Park used age-specific birth and death rates to calculate a generation time of 4.16 years (vonHoldt et al. 2008). The second, using estimated first-breeding times of 86 female wolves in northeastern Minnesota found a generation time of 4.3 years and using uterine examination of 159 female wolves from throughout Minnesota yielded a generation time of 4.7 years (Mech et al. 2016). We suggest that previous studies using a 3-year generation time recalculate their figures and adjust their conclusions based on these generation times and publish revised results.

  10. A new ejecta shell surrounding a Wolf-Rayet star in the LMC

    Science.gov (United States)

    Garnett, Donald R.; Chu, You-Hua

    1994-01-01

    We have obtained CCD spectra of newly discovered shell-like nebulae around the WN4 star Breysacher 13 and the WN1 star Breysacher 2 in the Large Magellanic Cloud (LMC). The shell around Br 13 shows definite signs of enrichment in both nitrogen and helium, having much stronger (N II) and He I emission lines than are seen in typical LMC H II regions. From the measured electron temperature of about 17,000 K in the shell, we derive He/H and N/O abundance ratios which are factors of 2 and more than 10 higher, respectively, than the average LMC interstellar values. The derived oxygen abundance in the Br 13 shell is down by a factor of 8 compared to the local LMC interstellar medium (ISM); however, the derived electron temperature is affected by the presence of an incomplete shock arising from the interaction of the stellar wind with photoionized material. This uncertainty does not affect the basic conclusion that the Br 13 shell is enriched by processed material from the Wolf-Rayet star. In contrast, the shell around Br 2 shows no clear evidence of enrichment. The nebular spectrum is characterized by extremely strong (O III) and He II emission and very weak (N II). We derive normal He, O, and N abundances from our spectrum. This object therefore appears to be simply a wind-blown structure associated with a relatively dense cloud near the Wolf-Rayet star, although the very high-ionization state of the gas is unusual for a nebula associated with a Wolf-Rayet star.

  11. The scale-dependent impact of wolf predation risk on resource selection by three sympatric ungulates.

    Science.gov (United States)

    Kittle, Andrew M; Fryxell, John M; Desy, Glenn E; Hamr, Joe

    2008-08-01

    Resource selection is a fundamental ecological process impacting population dynamics and ecosystem structure. Understanding which factors drive selection is vital for effective species- and landscape-level management. We used resource selection probability functions (RSPFs) to study the influence of two forms of wolf (Canis lupus) predation risk, snow conditions and habitat variables on white-tailed deer (Odocoileus virginianus), elk (Cervus elaphus) and moose (Alces alces) resource selection in central Ontario's mixed forest French River-Burwash ecosystem. Direct predation risk was defined as the frequency of a predator's occurrence across the landscape and indirect predation risk as landscape features associated with a higher risk of predation. Models were developed for two winters, each at two spatial scales, using a combination of GIS-derived and ground-measured data. Ungulate presence was determined from snow track transects in 64 16- and 128 1-km(2) resource units, and direct predation risk from GPS radio collar locations of four adjacent wolf packs. Ungulates did not select resources based on the avoidance of areas of direct predation risk at any scale, and instead exhibited selection patterns that tradeoff predation risk minimization with forage and/or mobility requirements. Elk did not avoid indirect predation risk, while both deer and moose exhibited inconsistent responses to this risk. Direct predation risk was more important to models than indirect predation risk but overall, abiotic topographical factors were most influential. These results indicate that wolf predation risk does not limit ungulate habitat use at the scales investigated and that responses to spatial sources of predation risk are complex, incorporating a variety of anti-predator behaviours. Moose resource selection was influenced less by snow conditions than cover type, particularly selection for dense forest, whereas deer showed the opposite pattern. Temporal and spatial scale

  12. Light curve of the CX Cep eclipsing binary system and characteristics of a Wolf-Rayet star

    International Nuclear Information System (INIS)

    Lipunova, N.A.; Cherepashchuk, A.M.

    1982-01-01

    The photoelectric B, V, R observations of the eclipsing Wolf-Rayet binary CX Cep (WN 5 + 08V, V approximately equal to 12sup(m),1, p approximately equal to 2sup(d),127) have been carried out. The physical characteristics of the WN 5 star, the core radius r 0 =(4.5+-2.5) Rsub(S) (Rsub(S) is the Sun radius) and the brightness temperature of the core Tsub(b)>50 000 K, are determined from the analysis of the light curve lambdasub(eff) approximately equal to 6 000 A. These characteristics are close to those of the WN 5 star in the eclipsing Wolf-Rayet binary V 444 Cyg. The results of the interpretation of the light curves of two eclipsing Wolf-Rayet binaries (V 444 Cyg and CX Cep) confirm the conclusions of the modern theory of evolution of massive close binary systems [ru

  13. Gray Wolf (Canis lupus) movements and behavior around a kill site and implications for GPS collar studies

    Science.gov (United States)

    Mech, L. David

    2011-01-01

    Global Positioning System (GPS) radio-collars are increasingly used to estimate Gray Wolf (Canis lupus) kill rates. In interpreting results from this technology, researchers make various assumptions about wolf behavior around kills, yet no detailed description of this behavior has been published. This article describes the behavior of six wolves in an area of constant daylight during 30 hours, from when the pack killed a Muskox (Ovibos moschatus) calf and yearling on Ellesmere Island, Nunavut, Canada, to when they abandoned the kill remains. Although this is only a single incident, it demonstrates one possible scenario of pack behavior around a kill. Combined with the literature, this observation supports placing a radio-collar on the breeding male to maximize finding kills via GPS collars and qualifying results depending on whatever other information is available about the collared wolf's pack.

  14. The Wolf-Rayet eclipsing binary HD 5980 in the Small Magellanic Cloud

    International Nuclear Information System (INIS)

    Breysacher, J.; Moffat, A.F.J.

    1982-01-01

    The Wolf-Rayet star HD 5980, which is probably associated with the bright HII region NGC 346 of the Small Magellanic Cloud, was found to be an eclipsing binary by Hoffmann, Stift and Moffat (1978). Breysacher and Perrier (1980) determined the orbital period, P=19.26 +- 0.003d, of the system whose light curve reveals a strongly eccentric orbit (e=0.47 for i=80 0 ). The behaviour of the light curve outside the eclipses shows that one is dealing with a rather complex binary system. An analysis of the spectroscopic data is presented here. (Auth.)

  15. Bursting star formation and the overabundance of Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Bodigfee, G.; Deloore, C.

    1985-01-01

    The ratio of the number of WR-stars to their OB progenitors appears to be significantly higher in some extragalactic systems than in our Galaxy. This overabundance of Wolf-Rayet-stars can be explained as a consequence of a recent burst of star formation. It is suggested that this burst is the manifestation of a long period nonlinear oscillation in the star formation process, produced by positive feedback effects between young stars and the interstellar medium. Star burst galaxies with large numbers of WR-stars must generate gamma fluxes but due to the distance, all of them are beyond the reach of present-day detectors, except probably 30 Dor

  16. Wolf-Rayet stars associated to giant regions of star formation

    International Nuclear Information System (INIS)

    D'Odorico, S.; Rosa, M.

    1982-01-01

    Data on Wolf-Rayet (WR) stars in extragalactic H II regions and emission line galaxies are presented and discussed. The sample is still limited and inhomogeneous but two important points appear to be already established: a) The WR stars are more numerous than the blue supergiants at least in same phase of the evolution of the stellar clusters which ionize the giant H II regions, b) When the WR stars are detected, two cases are apparently observed, one in which only WN, the other in which both WN and WC, are present. (Auth.)

  17. Capillariidae Eggs Found in the Urine of a Free Ranging Maned Wolf from Argentina

    OpenAIRE

    Martín Beldomenico,Pablo; Hunzicker,Daniel; Lopez Taverna,Julio; Rejf,Paula K

    2002-01-01

    The first finding of a Capillariid in the urinary tract of a free ranging maned wolf (Chrysocyon brachyurus) is described. The individual was an adult male attacked by dogs in the locality of Cayastacito (Santa Fe, Argentina, 31º05' S, 60º 34' W). Eggs found in urine measured 64.6-66.9µm (mean 65.4µm) x 26.9-31µm (mean 29µm). Further studies are needed to determine whether this finding corresponds to a new Capillariid species, related to C. brachyurus, or it is an already described species th...

  18. Capillariidae Eggs Found in the Urine of a Free Ranging Maned Wolf from Argentina

    Directory of Open Access Journals (Sweden)

    Martín Beldomenico Pablo

    2002-01-01

    Full Text Available The first finding of a Capillariid in the urinary tract of a free ranging maned wolf (Chrysocyon brachyurus is described. The individual was an adult male attacked by dogs in the locality of Cayastacito (Santa Fe, Argentina, 31º05' S, 60º 34' W. Eggs found in urine measured 64.6-66.9µm (mean 65.4µm x 26.9-31µm (mean 29µm. Further studies are needed to determine whether this finding corresponds to a new Capillariid species, related to C. brachyurus, or it is an already described species that has been introduced by domestic dogs.

  19. Capillariidae eggs found in the urine of a free ranging maned wolf from Argentina.

    Science.gov (United States)

    Beldomenico, Pablo Martín; Hunzicker, Daniel; Lopez Taverna, Julio; Rejf, Paula K

    2002-06-01

    The first finding of a Capillariid in the urinary tract of a free ranging maned wolf (Chrysocyon brachyurus) is described. The individual was an adult male attacked by dogs in the locality of Cayastacito (Santa Fe, Argentina, 31 degrees 05' S, 60 degrees 34' W). Eggs found in urine measured 64.6-66.9 micrometer (mean 65.4 micrometer) x 26.9-31 micrometer (mean 29 micrometer). Further studies are needed to determine whether this finding corresponds to a new Capillariid species, related to C. brachyurus, or it is an already described species that has been introduced by domestic dogs.

  20. A new survey of nebulae around Galactic Wolf-Rayet stars in the northern sky

    Science.gov (United States)

    Miller, Grant J.; Chu, You-Hua

    1993-01-01

    Interference filter CCD images have been obtained in H-alpha and forbidden O III 5007 A for 62 Wolf-Rayet (W-R) stars, representing a complete survey of nebulae around Galactic W-R stars in the northern sky. We find probable new ring nebulae around W-R stars number 113, 116 and 132, and possible new ring nebulae around W-R stars number 133 and 153. All survey images showing nebulosities around W-R stars are presented in this paper. New physical information is derived from the improved images of known ring nebulae. The absence of ring nebulae around most W-R stars is discussed.

  1. Discovery of a new Wolf-Rayet star using SAGE-LMC

    OpenAIRE

    Gvaramadze, V. V.; Chené, A. -N.; Kniazev, A. Y.; Schnurr, O.

    2011-01-01

    We report the first-ever discovery of an extragalactic Wolf-Rayet (WR)star with Spitzer. A new WR star in the Large Magellanic Cloud (LMC) was revealed via detection of its circumstellar shell using 24 {\\mu}m images obtained in the framework of the Spitzer Survey of the Large Magellanic Cloud (SAGE-LMC). Subsequent spectroscopic bservations with the Gemini South resolved the central star in two components, one of which is a WN3b+abs star, while the second one is a B0V star. We consider the lo...

  2. Recombinant Chromosome 4 from a Familial Pericentric Inversion: Prenatal and Adulthood Wolf-Hirschhorn Phenotypes

    Directory of Open Access Journals (Sweden)

    Francesca Malvestiti

    2013-01-01

    Full Text Available Pericentric inversion of chromosome 4 can give rise to recombinant chromosomes by duplication or deletion of 4p. We report on a familial case of Wolf-Hirschhorn Syndrome characterized by GTG-banding karyotypes, FISH, and array CGH analysis, caused by a recombinant chromosome 4 with terminal 4p16.3 deletion and terminal 4q35.2 duplication. This is an aneusomy due to a recombination which occurred during the meiosis of heterozygote carrier of cryptic pericentric inversion. We also describe the adulthood and prenatal phenotypes associated with the recombinant chromosome 4.

  3. Survey of selected pathogens and blood parameters of northern yellowstone elk: Wolf sanitation effect implications

    Science.gov (United States)

    Barber-Meyer, S. M.; White, P.J.; Mech, L.D.

    2007-01-01

    The restoration or conservation of predators could reduce seroprevalences of certain diseases in prey if predation selectively removes animals exhibiting clinical signs. We assessed disease seroprevalences and blood parameters of 115 adult female elk (Cervus elaphus) wintering on the northern range of Yellowstone National Park [YNP] during 2000-2005 and compared them to data collected prior to wolf (Canis lupus) restoration (WR) in 1995 and to two other herds in Montana to assess this prediction. Blood parameters were generally within two standard deviations of the means observed in other Montana herds (Gravelly-Snowcrest [GS] and Garnet Mountain [GM]), but Yellowstone elk had higher seroprevalences of parainfluenza-3 virus (95% CI YNP = 61.1-78.6, GS = 30.3-46.5) and bovine-virus-diarrhea virus type 1 (95% CI YNP = 15.9-31.9, GM = 0). In comparisons between pre-wolf restoration [pre-WR] (i.e., prior to 1995) seroprevalences with those post-wolf restoration [post-WR] in Yellowstone, we found lower seroprevalences for some disease-causing agents post-wolf restoration (e.g., bovine-virus-diarrhea virus type-1 [95% CI pre-WR = 73.1-86.3, post-WR = 15.9-31.9] and bovine-respiratory syncytial virus [95% CI pre-WR = 70.0-83.8, post-WR = 0]), but similar (e.g., Brucella abortus [95% CI pre-WR = 0-4.45, post-WR = 0-4.74] and epizootic hemorrhagic disease virus [95% CI pre-WR = 0, post-WR = 0]) or higher for others (e.g., Anaplasma marginale [95% CI pre-WR = 0, post-WR = 18.5-38.7] and Leptospira spp. [95% CI pre-WR = 0.5-6.5, post-WR = 9.5-23.5]). Though we did not detect an overall strong predation effect through reduced disease seroprevalence using retrospective comparisons with sparse data, our reference values will facilitate future assessments of this issue.

  4. A Dantzig-Wolfe Decomposition Algorithm for Linear Economic MPC of a Power Plant Portfolio

    DEFF Research Database (Denmark)

    Standardi, Laura; Edlund, Kristian; Poulsen, Niels Kjølstad

    2012-01-01

    Future power systems will consist of a large number of decentralized power producers and a large number of controllable power consumers in addition to stochastic power producers such as wind turbines and solar power plants. Control of such large scale systems requires new control algorithms....... In this paper, we formulate the control of such a system as an Economic Model Predictive Control (MPC) problem. When the power producers and controllable power consumers have linear dynamics, the Economic MPC may be expressed as a linear program and we apply Dantzig-Wolfe decomposition for solution...

  5. Prey nutrient composition has different effects on Pardosa wolf spiders with dissimilar life histories

    DEFF Research Database (Denmark)

    Jensen, Kim; Mayntz, David; Toft, Søren

    2011-01-01

    The nutritional composition of prey is known to influence predator life histories, but how the life history strategies of predators affect their susceptibility to nutrient imbalance is less investigated. We used two wolf spider species with different life histories as model predators: Pardosa...... amentata, which have a fixed annual life cycle, and Pardosa prativaga, which reproduce later and can extend development across 2 years. We fed juvenile spiders of the two species ad libitum diets of one of six Drosophila melanogaster fly types varying in lipid:protein composition during three instars, from...

  6. Carcinoma of the so-called empty breast and its relation to the Wolfe's parenchymal classification

    International Nuclear Information System (INIS)

    Schwarz, E.; Eiter, H.; Taxer, F.

    1983-01-01

    Carcinoma in the ''empty breast'' in our experience is so common that we doubt Wolfe's conclusions in his classification of parenchymal patterns. Amongst patients over 60 years, almost 70% of carcinomas were situated in an ''empty'' parenchyma and they did not develop in a parechymal group above P1. Mammographically, the ''empty breast'' is the structureless fatty breast of older women after the menopause. Some authors believe that there is a lower incidence of carcinomas in this type of breast than in other types of parenchyma, such as those showing mastopathies. Our experience concerning carcinomas in involuted breasts is described. (orig.) [de

  7. A conjugate gradient method with descent properties under strong Wolfe line search

    Science.gov (United States)

    Zull, N.; ‘Aini, N.; Shoid, S.; Ghani, N. H. A.; Mohamed, N. S.; Rivaie, M.; Mamat, M.

    2017-09-01

    The conjugate gradient (CG) method is one of the optimization methods that are often used in practical applications. The continuous and numerous studies conducted on the CG method have led to vast improvements in its convergence properties and efficiency. In this paper, a new CG method possessing the sufficient descent and global convergence properties is proposed. The efficiency of the new CG algorithm relative to the existing CG methods is evaluated by testing them all on a set of test functions using MATLAB. The tests are measured in terms of iteration numbers and CPU time under strong Wolfe line search. Overall, this new method performs efficiently and comparable to the other famous methods.

  8. New Galactic Candidate Luminous Blue Variables and Wolf-Rayet Stars

    Science.gov (United States)

    Stringfellow, Guy S.; Gvaramadze, Vasilii V.; Beletsky, Yuri; Kniazev, Alexei Y.

    2012-04-01

    We have undertaken a near-infrared spectral survey of stars associated with compact mid-IR shells recently revealed by the MIPSGAL (24 μm) and GLIMPSE (8 μm) Spitzer surveys, whose morphologies are typical of circumstellar shells produced by massive evolved stars. Through spectral similarity with known Luminous Blue Variable (LBV) and Wolf-Rayet (WR) stars, a large population of candidate LBVs (cLBVs) and a smaller number of new WR stars are being discovered. This significantly increases the Galactic cLBV population and confirms that nebulae are inherent to most (if not all) objects of this class.

  9. Do really all wolf spiders carry spiderlings on their opisthosomas? The case of Hygrolycosa rubrofasciata (Araneae: Lycosidae

    Directory of Open Access Journals (Sweden)

    Dolejš, Petr

    2013-06-01

    Full Text Available Wolf spider females are characterised by carrying cocoons attached to their spinnerets. Emerged spiderlings are carried on the females’ opisthosomas, with the exception of three Japanese lycosid species who carry spiderlings on empty cocoons. Here, the same behaviour is recorded in a European spider: the drumming wolf spider Hygrolycosa rubrofasciata. Spiderlings of this species do not try to climb on the female’s opisthosoma, even when they are adopted by a female of a species with a normal pulli-carrying behaviour. This behaviour occurs in Trechaleidae and four unrelated species of Lycosidae inhabiting wet habitats and is therefore regarded as an adaptation to the unsuitable environment.

  10. Palmer LTER: Patterns of distribution of five dominant zooplankton species in the epipelagic zone west of the Antarctic Peninsula, 1993 2004

    Science.gov (United States)

    Ross, Robin M.; Quetin, Langdon B.; Martinson, Douglas G.; Iannuzzi, Rich A.; Stammerjohn, Sharon E.; Smith, Raymond C.

    2008-09-01

    Variability in the temporal-spatial distribution and abundance of zooplankton was documented each summer on the Palmer Long-Term Ecological Research (LTER) grid west of the Antarctic Peninsula between Anvers and Adelaide Islands during a 12-yr time series. Oblique tows to 120 m with a 2×2 m fixed-frame net were made at about 50 stations each January/February between 1993 and 2004. The numerically dominant macro- and mesozooplanktonic species >2 mm included three species of euphausiids ( Euphausia superba, Antarctic krill; Thysanoëssa macrura; Euphausia crystallorophias, ice krill), a shelled pteropod ( Limacina helicina), and a salp ( Salpa thompsoni). Life cycles, life spans, and habitat varied among these species. Abundance data from each year were allocated to 100 km by 20 km (alongshore by on/offshore) grid cells centered on cardinal transect lines and stations within the Palmer LTER grid. The long-term mean or climatology and means for each year were used to calculate annual anomalies across the grid. Principal components analysis (PCA) was used to analyze for patterns and trends in the temporal-spatial variability of the five species. Questions included whether there are groups of species with similar patterns, and whether population cycles, species interactions or seasonal sea-ice parameters were correlated with detected patterns. Patterns in the climatology were distinct, and matched those of physical parameters. Common features included higher abundance in the north than in the south, independent of the cross-shelf gradients, and cross-shelf gradients with higher abundance either inshore ( E. crystallorophias) or offshore ( S. thompsoni). Anomalies revealed either cycles in the population, as episodic recruitment in Antarctic krill, or changes in anomaly pattern between the first and second half of the sampling period. The 1998 year, which coincided with a rapid change from a negative to a positive phase in the SOI, emerged as a year with either

  11. Climate conditions and drought assessment with the Palmer Drought Severity Index in Iran: evaluation of CORDEX South Asia climate projections (2070-2099)

    Science.gov (United States)

    Senatore, Alfonso; Hejabi, Somayeh; Mendicino, Giuseppe; Bazrafshan, Javad; Irannejad, Parviz

    2018-03-01

    Climate change projections were evaluated over both the whole Iran and six zones having different precipitation regimes considering the CORDEX South Asia dataset, for assessing space-time distribution of drought occurrences in the future period 2070-2099 under RCP4.5 scenario. Initially, the performances of eight available CORDEX South Asia Regional Climate Models (RCMs) were assessed for the baseline period 1970-2005 through the GPCC v.7 precipitation dataset and the CFSR temperature dataset, which were previously selected as the most reliable within a set of five global datasets compared to 41 available synoptic stations. Though the CCLM RCM driven by the MPI-ESM-LR General Circulation Model is in general the most suitable for temperature and, together with the REMO 2009 RCM also driven by MPI-ESM-LR, for precipitation, their performances do not overwhelm other models for every season and zone in which Iranian territory was divided according to a principal component analysis approach. Hence, a weighting approach was tested and adopted to take into account useful information from every RCM in each of the six zones. The models resulting more reliable compared to current climate show a strong precipitation decrease. Weighted average predicts an overall yearly precipitation decrease of about 20%. Temperature projections provide a mean annual increase of 2.4 °C. Future drought scenarios were depicted by means of the self-calibrating version of the Palmer drought severity index (SC-PDSI) model. Weighted average predicts a sharp drying that can be configured as a real shift in mean climate conditions, drastically affecting water resources of the country.

  12. Rangelia vitalii in a free-ranging maned wolf (Chrysocyon brachyurus) and co-infections.

    Science.gov (United States)

    Silveira, Julia Angélica Gonçalves; D'Elia, Mirella Lauria; de Oliveira Avelar, Isabela; de Almeida, Lara Ribeiro; Dos Santos, Hudson Andrade; de Magalhães Soares, Danielle Ferreira; Ribeiro, Múcio Flávio Barbosa; Dos Santos Lima, Walter; Ecco, Roselene

    2016-12-01

    An adult free-ranged female maned wolf was rescued from a periurban area subject to anthropogenic disturbances in the Minas Gerais, Brazil. The animal presented poor body condition and anemia. The clinical condition rapidly deteriorated culminating in dead and a necropsy was performed. The main gross lesions were marked anemia and blood content in the intestines accompanied by many types of parasites. The protozoa Rangelia vitalii was identified by histopathological analysis predominantly within the cytoplasm of endothelial cells of capillaries of the small intestine. The lymph nodes, spleen, bone marrow, dermis, lungs and kidney had similar protozoal forms but with mild or moderate intensity. Rangelia vitalii was confirmed by molecular assays. Hepatozoon sp., Leishmania sp., and Entamoeba spp., apparently not related to the clinical signs were also detected. The myriad parasites found in the intestines included nematodes ( Ancylostoma caninum , A . braziliensis ,, Molineus sp., Pterygodermatites sp., and Trichuris sp.), cestodes ( Spirometra sp.) and (acanthocephalans. To our knowledge, R . vitalii was identified in C . brachyurus for the first time. These findings emphasize the fragility of Brazilian ecosystems, especially in disturbed areas, reinforcing the necessity of efforts to preserve these areas and wild carnivores, some of which are threatened with extinction, such as the maned wolf.

  13. SN 2008D: A WOLF-RAYET EXPLOSION THROUGH A THICK WIND

    International Nuclear Information System (INIS)

    Svirski, Gilad; Nakar, Ehud

    2014-01-01

    Supernova (SN) 2008D/XRT 080109 is considered to be the only direct detection of a shock breakout from a regular SN to date. While a breakout interpretation was favored by several papers, inconsistencies remain between the observations and current SN shock breakout theory. Most notably, the duration of the luminous X-ray pulse is considerably longer than expected for a spherical breakout through the surface of a type Ibc SN progenitor, and the X-ray radiation features, mainly its flat spectrum and its luminosity evolution, are enigmatic. We apply a recently developed theoretical model for the observed radiation from a Wolf-Rayet SN exploding through a thick wind and show that it naturally explains all of the observed features of SN 2008D X-ray emission, including the energetics, the spectrum, and the detailed luminosity evolution. We find that the inferred progenitor and SN parameters are typical for an exploding Wolf-Rayet. A comparison of the wind density found at the breakout radius and the density at much larger radii, as inferred by late radio observations, suggests an enhanced mass-loss rate taking effect about 10 days prior to the SN explosion. This finding joins accumulating evidence for a possible late phase in the stellar evolution of massive stars, involving vigorous mass loss a short time before the SN explosion

  14. DISCOVERY OF TWIN WOLF-RAYET STARS POWERING DOUBLE RING NEBULAE

    International Nuclear Information System (INIS)

    Mauerhan, Jon C.; Wachter, Stefanie; Van Dyk, Schuyler D.; Hoard, D. W.; Morris, Patrick W.

    2010-01-01

    We have spectroscopically discovered a pair of twin, nitrogen-type, hydrogen-rich, Wolf-Rayet stars (WN8-9h) that are both surrounded by circular, mid-infrared-bright nebulae detected with the Spitzer Space Telescope and MIPS instrument. The emission is probably dominated by a thermal continuum from cool dust, but also may contain contributions from atomic line emission. There is no counterpart at shorter Spitzer/IRAC wavelengths, indicating a lack of emission from warm dust. The two nebulae are probably wind-swept stellar ejecta released by the central stars during a prior evolutionary phase. The nebulae partially overlap on the sky and we speculate on the possibility that they are in the early stage of a collision. Two other evolved massive stars have also been identified within the area subtended by the nebulae, including a carbon-type Wolf-Rayet star (WC8) and an O7-8 III-I star, the latter of which appears to be embedded in one of the larger WN8-9h nebulae. The derived distances to these stars imply that they are coeval members of an association lying 4.9 ± 1.2 kpc from Earth, near the intersection of the Galaxy's Long Bar and the Scutum-Centaurus spiral arm. This new association represents an unprecedented display of complex interactions between multiple stellar winds, outflows, and the radiation fields of evolved massive stars.

  15. SN 2008D: A WOLF-RAYET EXPLOSION THROUGH A THICK WIND

    Energy Technology Data Exchange (ETDEWEB)

    Svirski, Gilad; Nakar, Ehud [Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel)

    2014-06-10

    Supernova (SN) 2008D/XRT 080109 is considered to be the only direct detection of a shock breakout from a regular SN to date. While a breakout interpretation was favored by several papers, inconsistencies remain between the observations and current SN shock breakout theory. Most notably, the duration of the luminous X-ray pulse is considerably longer than expected for a spherical breakout through the surface of a type Ibc SN progenitor, and the X-ray radiation features, mainly its flat spectrum and its luminosity evolution, are enigmatic. We apply a recently developed theoretical model for the observed radiation from a Wolf-Rayet SN exploding through a thick wind and show that it naturally explains all of the observed features of SN 2008D X-ray emission, including the energetics, the spectrum, and the detailed luminosity evolution. We find that the inferred progenitor and SN parameters are typical for an exploding Wolf-Rayet. A comparison of the wind density found at the breakout radius and the density at much larger radii, as inferred by late radio observations, suggests an enhanced mass-loss rate taking effect about 10 days prior to the SN explosion. This finding joins accumulating evidence for a possible late phase in the stellar evolution of massive stars, involving vigorous mass loss a short time before the SN explosion.

  16. Rangelia vitalii in a free-ranging maned wolf (Chrysocyon brachyurus and co-infections

    Directory of Open Access Journals (Sweden)

    Julia Angélica Gonçalves Silveira

    2016-12-01

    Full Text Available An adult free-ranged female maned wolf was rescued from a periurban area subject to anthropogenic disturbances in the Minas Gerais, Brazil. The animal presented poor body condition and anemia. The clinical condition rapidly deteriorated culminating in dead and a necropsy was performed. The main gross lesions were marked anemia and blood content in the intestines accompanied by many types of parasites. The protozoa Rangelia vitalii was identified by histopathological analysis predominantly within the cytoplasm of endothelial cells of capillaries of the small intestine. The lymph nodes, spleen, bone marrow, dermis, lungs and kidney had similar protozoal forms but with mild or moderate intensity. Rangelia vitalii was confirmed by molecular assays. Hepatozoon sp., Leishmania sp., and Entamoeba spp., apparently not related to the clinical signs were also detected. The myriad parasites found in the intestines included nematodes (Ancylostoma caninum, A. braziliensis,, Molineus sp., Pterygodermatites sp., and Trichuris sp., cestodes (Spirometra sp. and (acanthocephalans. To our knowledge, R. vitalii was identified in C. brachyurus for the first time. These findings emphasize the fragility of Brazilian ecosystems, especially in disturbed areas, reinforcing the necessity of efforts to preserve these areas and wild carnivores, some of which are threatened with extinction, such as the maned wolf.

  17. Is the Red Wolf a Listable Unit Under the US Endangered Species Act?

    Science.gov (United States)

    Waples, Robin S; Kays, Roland; Fredrickson, Richard J; Pacifici, Krishna; Mills, L Scott

    2018-06-08

    Defining units that can be afforded legal protection is a crucial, albeit challenging, step in conservation planning. As we illustrate with a case study of the red wolf (Canis rufus) from the southeastern United States, this step is especially complex when the evolutionary history of the focal taxon is uncertain. The US Endangered Species Act (ESA) allows listing of species, subspecies, or Distinct Population Segments (DPSs) of vertebrates. Red wolves were listed as an endangered species in 1973, and their status remains precarious. However, some recent genetic studies suggest that red wolves are part of a small wolf species (C. lycaon) specialized for heavily forested habitats of eastern North America, whereas other authors suggest that red wolves arose, perhaps within the last ~400 years, through hybridization between gray wolves (C. lupus) and coyotes (C. latrans). Using published genetic, morphological, behavioral, and ecological data, we evaluated whether each evolutionary hypothesis would lead to a listable unit for red wolves. Although the potential hybrid origin of red wolves, combined with abundant evidence for recent hybridization with coyotes, raises questions about status as a separate species or subspecies, we conclude that under any proposed evolutionary scenario red wolves meet both criteria to be considered a DPS: they are discrete compared with other conspecific populations, and they are Significant to the taxon to which they belong. As population-level units can qualify for legal protection under endangered-species legislation in many countries throughout the world, this general approach could potentially be applied more broadly.

  18. Intraocular pressure and Schirmer tear test values in maned wolf (Chrysocyon brachyurus

    Directory of Open Access Journals (Sweden)

    Cristiane S. Honsho

    Full Text Available Abstract: The purpose of this study was to establish baseline data on lacrimal quantity (STT-1 and intraocular pressure (IOP in captive maned wolves. Ten healthy adult maned wolves were contained with a snare pole and muzzle and kept in decubitus of the left side. STT-1 measurement was performed on the lateral third of the lower conjunctival sac for one minute. The cornea was desensitized and intraocular pressure was measured with an tonopen. Average STT-1 in both eyes was 11±5mm.min-1, with no statistical difference between the left and right eye (p=0.960. Average IOP in both eyes was 20±6mmHg, with no statistical difference between the left and right eye (p=0.836. Average STT-1 was lower than, and IOP was the same as normal levels found in dogs. There was no statistical difference in the age of the animals, and STT-1 and IOP values. In the present paper, average maned wolf STT-1 levels were lower compared with those found in dogs, while the IOP was the same in maned wolves as in dogs. Due to the increased incidence in providing emergency care for maned wolf victims of road kill and fires, determination reference values of ocular parameters may improve the correct diagnosis and treatment of the disease.

  19. Ring chromosome 4 and Wolf-Hirschhorn syndrome (WHS) in a child with multiple anomalies.

    Science.gov (United States)

    Balci, Sevim; Engiz, Ozlem; Aktaş, Dilek; Vargel, Ibrahim; Beksaç, M S; Mrasek, Kristin; Vermeesch, Joris; Liehr, Thomas

    2006-03-15

    We report on a 16-month-old male patient with ring chromosome 4 and deletion of Wolf-Hirschhorn syndrome (WHS) region with multiple congenital anomalies including unilateral cleft lip and palate, iris coloboma, microcephaly, midgut malrotation, hypospadias, and double urethral orifices. Peripheral chromosome analysis of the patient showed 46,XY,r(4)(p16.3q35) de novo. Multicolor fluorescence in situ hybridization (FISH) study was also performed and according to multicolor banding (MCB) a r(4)(::p16.3 --> q34.3 approximately 35.1::) was found in all metaphases. Subtelomeric 4p region, subtelomeric 4q region, as well as, Wolf-Hirschhorn critical region were deleted in ring chromosome 4. Genomic microarray analysis was also performed to delineate the size of deletion. Cranial magnetic resonance imaging (MRI) showed hypoplastic corpus callosum, delayed myelinization, and frontal and occipital lobe atrophies. Both maternal and paternal chromosomal analyses were normal. We compare the phenotypic appearance of our patient with the previously reported 16 cases of ring chromosome 4 in the medical literature. 2006 Wiley-Liss, Inc.

  20. Developing metapopulation connectivity criteria from genetic and habitat data to recover the endangered Mexican wolf.

    Science.gov (United States)

    Carroll, Carlos; Fredrickson, Richard J; Lacy, Robert C

    2014-02-01

    Restoring connectivity between fragmented populations is an important tool for alleviating genetic threats to endangered species. Yet recovery plans typically lack quantitative criteria for ensuring such population connectivity. We demonstrate how models that integrate habitat, genetic, and demographic data can be used to develop connectivity criteria for the endangered Mexican wolf (Canis lupus baileyi), which is currently being restored to the wild from a captive population descended from 7 founders. We used population viability analysis that incorporated pedigree data to evaluate the relation between connectivity and persistence for a restored Mexican wolf metapopulation of 3 populations of equal size. Decreasing dispersal rates greatly increased extinction risk for small populations (0.5 genetically effective migrants per generation may be achievable via natural dispersal under current landscape conditions. When sufficient data are available, these methods allow planners to move beyond general aspirational connectivity goals or rules of thumb to develop objective and measurable connectivity criteria that more effectively support species recovery. The shift from simple connectivity rules of thumb to species-specific analyses parallels the previous shift from general minimum-viable-population thresholds to detailed viability modeling in endangered species recovery planning. © 2013 Society for Conservation Biology.

  1. A Grey Wolf Optimizer for Modular Granular Neural Networks for Human Recognition

    Directory of Open Access Journals (Sweden)

    Daniela Sánchez

    2017-01-01

    Full Text Available A grey wolf optimizer for modular neural network (MNN with a granular approach is proposed. The proposed method performs optimal granulation of data and design of modular neural networks architectures to perform human recognition, and to prove its effectiveness benchmark databases of ear, iris, and face biometric measures are used to perform tests and comparisons against other works. The design of a modular granular neural network (MGNN consists in finding optimal parameters of its architecture; these parameters are the number of subgranules, percentage of data for the training phase, learning algorithm, goal error, number of hidden layers, and their number of neurons. Nowadays, there is a great variety of approaches and new techniques within the evolutionary computing area, and these approaches and techniques have emerged to help find optimal solutions to problems or models and bioinspired algorithms are part of this area. In this work a grey wolf optimizer is proposed for the design of modular granular neural networks, and the results are compared against a genetic algorithm and a firefly algorithm in order to know which of these techniques provides better results when applied to human recognition.

  2. Wolf pack hunting strategy for automatic generation control of an islanding smart distribution network

    International Nuclear Information System (INIS)

    Xi, Lei; Zhang, Zeyu; Yang, Bo; Huang, Linni; Yu, Tao

    2016-01-01

    Highlights: • A mixed homogeneous and heterogeneous multi-agent based wolf pack hunting (WPH) method is proposed. • WPH can effectively handle the ever-increasing penetration of renewable energy in smart grid. • An AGC power dispatch, coordinated control, and electric power autonomy of an ISDN is achieved. - Abstract: As the conventional centralized automatic generation control (AGC) is inadequate to handle the ever-increasing penetration of renewable energy and the requirement of plug-and-play of smart grid, this paper proposes a mixed homogeneous and heterogeneous multi-agent based wolf pack hunting (WPH) strategy to achieve a fast AGC power dispatch, optimal coordinated control, and electric power autonomy of an islanding smart distribution network (ISDN). A virtual consensus variable is employed to deal with the topology variation resulted from the excess of power limits and to achieve the plug-and-play of AGC units. Then an integrated objective of frequency deviation and short-term economic dispatch is developed, such that all units can maintain an optimal operation in the presence of load disturbances. Four case studies are undertaken to an ISDN with various distributed generations and microgrids. Simulation results demonstrate that WPH has a greater robustness and a faster dynamic optimization than that of conventional approaches, which can increase the utilization rate of the renewable energy and effectively resolve the coordination and electric power autonomy of ISDN.

  3. Integrated Sachs-Wolfe effect in a quintessence cosmological model: Including anisotropic stress of dark energy

    International Nuclear Information System (INIS)

    Wang, Y. T.; Xu, L. X.; Gui, Y. X.

    2010-01-01

    In this paper, we investigate the integrated Sachs-Wolfe effect in the quintessence cold dark matter model with constant equation of state and constant speed of sound in dark energy rest frame, including dark energy perturbation and its anisotropic stress. Comparing with the ΛCDM model, we find that the integrated Sachs-Wolfe (ISW)-power spectrums are affected by different background evolutions and dark energy perturbation. As we change the speed of sound from 1 to 0 in the quintessence cold dark matter model with given state parameters, it is found that the inclusion of dark energy anisotropic stress makes the variation of magnitude of the ISW source uncertain due to the anticorrelation between the speed of sound and the ratio of dark energy density perturbation contrast to dark matter density perturbation contrast in the ISW-source term. Thus, the magnitude of the ISW-source term is governed by the competition between the alterant multiple of (1+3/2xc-circumflex s 2 ) and that of δ de /δ m with the variation of c-circumflex s 2 .

  4. DISCOVERY OF A WOLF-RAYET STAR THROUGH DETECTION OF ITS PHOTOMETRIC VARIABILITY

    International Nuclear Information System (INIS)

    Littlefield, Colin; Garnavich, Peter; McClelland, Colin; Rettig, Terrence; Marion, G. H.; Vinkó, József; Wheeler, J. Craig

    2012-01-01

    We report the serendipitous discovery of a heavily reddened Wolf-Rayet star that we name WR 142b. While photometrically monitoring a cataclysmic variable, we detected weak variability in a nearby field star. Low-resolution spectroscopy revealed a strong emission line at 7100 Å, suggesting an unusual object and prompting further study. A spectrum taken with the Hobby-Eberly Telescope confirms strong He II emission and an N IV 7112 Å line consistent with a nitrogen-rich Wolf-Rayet star of spectral class WN6. Analysis of the He II line strengths reveals no detectable hydrogen in WR 142b. A blue-sensitive spectrum obtained with the Large Binocular Telescope shows no evidence for a hot companion star. The continuum shape and emission line ratios imply a reddening of E(B – V) = 2.2-2.6 mag. We estimate that the distance to WR 142b is 1.4 ± 0.3 kpc.

  5. The Lurking Wolf: Qualitative Research of Existential Experiences with Lupus in Female Patients

    DEFF Research Database (Denmark)

    Larsen, Janni Lisander; Jacobsen, Søren; Hall, Elisabeth

    THE LURKING OF THE WOLF- QUALITATIVE RESARCH OF EXISTENTIAL EXPERIENCES WITH LUPUS IN FEMALE PATIENTS. J. Lisander Larsen (1, 2), S. Jacobsen (2), E.O. C. Hall (1), R. Birkelund(3) (1) Department of Public Health, Aarhus University, Section for Nursing, Denmark. (2) University Hospital of Copenha......THE LURKING OF THE WOLF- QUALITATIVE RESARCH OF EXISTENTIAL EXPERIENCES WITH LUPUS IN FEMALE PATIENTS. J. Lisander Larsen (1, 2), S. Jacobsen (2), E.O. C. Hall (1), R. Birkelund(3) (1) Department of Public Health, Aarhus University, Section for Nursing, Denmark. (2) University Hospital...... for existential uncertainty. Patient experiences are scarcely researched, and studies do not emphasize existential themes at stake during the illness trajectory and this leaves a knowledge gap important for evidence-based nursing support. Purpose: The purpose of this PhD study is to explore the meaning...... of existential experiences over time in female patients suffering from Lupus. Method: Three 3 qualitative indept interviews with 15 women is planned during 1½ year. First and second round is performed, and third is planned during spring 2015. Interviews are guided by Van Manens life world existentials (time...

  6. A New Hybrid Whale Optimizer Algorithm with Mean Strategy of Grey Wolf Optimizer for Global Optimization

    Directory of Open Access Journals (Sweden)

    Narinder Singh

    2018-03-01

    Full Text Available The quest for an efficient nature-inspired optimization technique has continued over the last few decades. In this paper, a hybrid nature-inspired optimization technique has been proposed. The hybrid algorithm has been constructed using Mean Grey Wolf Optimizer (MGWO and Whale Optimizer Algorithm (WOA. We have utilized the spiral equation of Whale Optimizer Algorithm for two procedures in the Hybrid Approach GWO (HAGWO algorithm: (i firstly, we used the spiral equation in Grey Wolf Optimizer algorithm for balance between the exploitation and the exploration process in the new hybrid approach; and (ii secondly, we also applied this equation in the whole population in order to refrain from the premature convergence and trapping in local minima. The feasibility and effectiveness of the hybrid algorithm have been tested by solving some standard benchmarks, XOR, Baloon, Iris, Breast Cancer, Welded Beam Design, Pressure Vessel Design problems and comparing the results with those obtained through other metaheuristics. The solutions prove that the newly existing hybrid variant has higher stronger stability, faster convergence rate and computational accuracy than other nature-inspired metaheuristics on the maximum number of problems and can successfully resolve the function of constrained nonlinear optimization in reality.

  7. Discovery of a new Wolf-Rayet star and its ring nebula in Cygnus

    Science.gov (United States)

    Gvaramadze, V. V.; Fabrika, S.; Hamann, W.-R.; Sholukhova, O.; Valeev, A. F.; Goranskij, V. P.; Cherepashchuk, A. M.; Bomans, D. J.; Oskinova, L. M.

    2009-11-01

    We report the serendipitous discovery of a ring nebula around a candidate Wolf-Rayet (WR) star, HBHA4202-22, in Cygnus using the Spitzer Space Telescope archival data. Our spectroscopic follow-up observations confirmed the WR nature of this star (we named it WR138a) and showed that it belongs to the WN8-9h subtype. We thereby add a new example to the known sample of late WN stars with circumstellar nebulae. We analysed the spectrum of WR138a by using the Potsdam Wolf-Rayet (PoWR) model atmospheres, obtaining a stellar temperature of 40kK. The stellar wind composition is dominated by helium with 20 per cent of hydrogen. The stellar spectrum is highly reddened and absorbed (EB- V = 2.4mag, AV = 7.4mag). Adopting a stellar luminosity of logL/Lsolar = 5.3, the star has a mass-loss rate of 10-4.7Msolaryr-1, and resides in a distance of 4.2 kpc. We measured the proper motion for WR138a and found that it is a runaway star with a peculiar velocity of ~=50kms-1. Implications of the runaway nature of WR138a for constraining the mass of its progenitor star and understanding the origin of its ring nebula are discussed.

  8. Experience of the diagnosis and observation of a child with wolf-hirschhorn syndrome

    Directory of Open Access Journals (Sweden)

    L.V. Besh

    2017-02-01

    Full Text Available Modern data about the causes, course peculiarities, principles of diagnosis and symptomatic treatment of Wolf-Hirshhorn syndrome are given in the article. The description of own clinical case is presented. In most cases, there are multiple developmental abnormalities, in particular heart and kidney defects. External symptoms include: the unusual structure of the skull (“ancient warrior’s helmet”, straight bridge of the nose, moderately severe microcephaly, hypertelorism, small mouth with drooping corners, abnormal auricle’s forms, also cleft lip and cleft palate, eyeballs anomalies, hypospadias, feet deformity. Hemangiomas of the skin are often presented, they are usually flat, small and located on the face. Muscle hypotonia, significantly reduced reaction to external stimuli are revealed during the examination. The diagnosis is based on clinical changes and is confirmed by the DNA research. Deletion of the short arm of chromosome 4 is detected in approximately 80 % of probands. The description of own clinical observation of a child with Wolf-Hirshhorn syndrome, confirmed at the age of 3 months, is presented. Despite the early detection of the syndrome and prescribed appropriate therapy, the disease has a poor prognosis.

  9. The close binary frequency of Wolf-Rayet stars as a function of metallicity in M31 and M33

    Energy Technology Data Exchange (ETDEWEB)

    Neugent, Kathryn F.; Massey, Philip, E-mail: kneugent@lowell.edu, E-mail: phil.massey@lowell.edu [Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001 (United States)

    2014-07-01

    Massive star evolutionary models generally predict the correct ratio of WC-type and WN-type Wolf-Rayet stars at low metallicities, but underestimate the ratio at higher (solar and above) metallicities. One possible explanation for this failure is perhaps single-star models are not sufficient and Roche-lobe overflow in close binaries is necessary to produce the 'extra' WC stars at higher metallicities. However, this would require the frequency of close massive binaries to be metallicity dependent. Here we test this hypothesis by searching for close Wolf-Rayet binaries in the high metallicity environments of M31 and the center of M33 as well as in the lower metallicity environments of the middle and outer regions of M33. After identifying ∼100 Wolf-Rayet binaries based on radial velocity variations, we conclude that the close binary frequency of Wolf-Rayets is not metallicity dependent and thus other factors must be responsible for the overabundance of WC stars at high metallicities. However, our initial identifications and observations of these close binaries have already been put to good use as we are currently observing additional epochs for eventual orbit and mass determinations.

  10. Identification of two new races of Diplocarpon rosae Wolf, the causal agent of rose black spot disease

    Science.gov (United States)

    The fungal pathogen, Diplocarpon rosae Wolf, infects only roses (Rosa spp.) and leads to rose black spot disease. Rose black spot is the most problematic disease of outdoor grown roses worldwide, due to the potential for rapid leaf yellowing and defoliation. Plants repeatedly defoliated from black ...

  11. Largest global shark biomass found in the northern Galápagos Islands of Darwin and Wolf

    Directory of Open Access Journals (Sweden)

    Pelayo Salinas de León

    2016-05-01

    Full Text Available Overfishing has dramatically depleted sharks and other large predatory fishes worldwide except for a few remote and/or well-protected areas. The islands of Darwin and Wolf in the far north of the Galapagos Marine Reserve (GMR are known for their large shark abundance, making them a global scuba diving and conservation hotspot. Here we report quantitative estimates of fish abundance at Darwin and Wolf over two consecutive years using stereo-video surveys, which reveal the largest reef fish biomass ever reported (17.5 t ${\\mathrm{ha}}^{-1}$ ha − 1 on average, consisting largely of sharks. Despite this, the abundance of reef fishes around the GMR, such as groupers, has been severely reduced because of unsustainable fishing practices. Although Darwin and Wolf are within the GMR, they were not fully protected from fishing until March 2016. Given the ecological value and the economic importance of Darwin and Wolf for the dive tourism industry, the current protection should ensure the long-term conservation of this hotspot of unique global value.

  12. The first wolf found in the Netherlands in 150 years was the victim of a wildlife crime

    NARCIS (Netherlands)

    Gravendeel, B.; Groot, de G.A.; Kik, M.; Beentjes, K.; Bergman, H.; Caniglia, R.; Cremers, H.; Fabbri, E.; Groenenberg, D.; Grone, A.; Groot Bruinderink, G.W.T.A.; Font, I.; Hakhof, J.; Harms, V.; Jansman, H.A.H.; Janssen, R.; Lammertsma, D.R.; Laros, I.; Linnartz, L.; Marel, van der D.; Mulder, J.L.; Mije, van der S.; Nieman, A.M.; Nowak, C.; Randi, E.; Rijks, M.; Speksnijder, A.; Vonhof, H.B.

    2013-01-01

    On July 4th 2013 a dead subadult female wolf-like canid was found by the roadside between Luttelgeest and Marknesse in the Noordoostpolder in the central part of the Netherlands. As the last observations of wild wolves in the Netherlands date back to 1869 the discovery of this animal generated a lot

  13. 78 FR 35663 - Endangered and Threatened Wildlife and Plants; Removing the Gray Wolf (Canis lupus) From the List...

    Science.gov (United States)

    2013-06-13

    ... legs that are well adapted to running, allowing them to move fast and travel far in search of food... area of unsuitable habitat. Wolf populations are remarkably resilient as long as food supply (a... populations are maintained below carrying capacity and natural mortality rates and self-regulation of the...

  14. 76 FR 81665 - Endangered and Threatened Wildlife and Plants; Revising the Listing of the Gray Wolf (Canis lupus...

    Science.gov (United States)

    2011-12-28

    ... Wolf (Canis lupus) in the Western Great Lakes; Final rule #0;#0;Federal Register / Vol. 76, No. 249... (Canis lupus) in the Western Great Lakes AGENCY: Fish and Wildlife Service, Interior. ACTION: Final rule... Minnesota population of gray wolves (Canis lupus) to conform to current statutory and policy requirements...

  15. Treatment of a forelimb fracture and rehabilitation of a free-ranging Iberian Wolf (Canis lupus signatus

    Directory of Open Access Journals (Sweden)

    Filipe C. Silva

    2016-05-01

    Full Text Available Abstract: The surgical treatment of an exposed compounded comminuted fracture of the right radius and ulna in a free-ranging adult female Iberian Wolf (Canis lupus signatus with an osteosynthesis plate and screws and subsequent post-operative care are described. The evolution of the fracture healing was very similar to those expected in a dog of the same size. The prompt surgical intervention and a proper housing, feeding and wound management adapted to a free-ranging wolf, in view to reduce manipulation and post-operative complications, allowed the subsequent rehabilitation and release of the animal. After 10th post-operative weeks the wolf was fitted with a Global Positioning System (GPS for wildlife tracking collar and released in the same area where it has been caught. GPS telemetry data showed that the animal covered increasingly large distances confirming a complete functionality of the right thoracic limb and its successfully return to the wild. This report could constitute the first detailed report of a long bone fracture treatment in a free-ranging wolf and its successfully rehabilitation, release and adaptation to the wild.

  16. 75 FR 65574 - Endangered and Threatened Wildlife and Plants; Reinstatement of Protections for the Gray Wolf in...

    Science.gov (United States)

    2010-10-26

    ... courses: (A) If the animal was not involved in conflicts with humans and is determined likely to be an... an experimental wolf and was involved in conflicts with humans as identified in the management plan... DEPARTMENT OF THE INTERIOR Fish and Wildlife Service 50 CFR Part 17 [Docket No. FWS-R6-ES-2010...

  17. Effects of hunger level and nutrient balance on survival and acetylcholinesterase activity of dimethoate exposed wolf spiders

    DEFF Research Database (Denmark)

    Pedersen, Lars-Flemming; Dall, Lars G.; Sorensen, Bo C.

    2002-01-01

    The influence of two nutritional factors (food quantity and quality) on the responses of a wolf spider, Pardosa prativaga (L.K.), to a high dose of the insecticide dimethoate, was investigated in a fully factorial experimental design. Spider groups with different (good and bad) nutrient balance w...

  18. Integrating immunomarking with ecological and behavioural approaches to assess predation of Helicoverpa spp. larvae by wolf spiders in cotton

    Science.gov (United States)

    Wolf spiders (Araneae: Lycosidae) are abundant soil-dwelling predators found in cotton fields and can contribute important pest management services. These spiders can kill and consume larvae of the cotton bollworm Helicoverpa spp. (Lepidoptera: Noctuidae) that survive foraging on Bt cotton and desce...

  19. Using Pop-II models to predict effects of wolf predation and hunter harvests on elk, mule deer, and moose on the northern range

    Science.gov (United States)

    Mack, John A.; Singer, Francis J.

    1993-01-01

    The effects of establishing a gray wolf (Canis lupus) population in Yellowstone National Park were predicted for three ungulate species—elk (Cervus elaphus), mule deer (Odocoileus hemionus), and moose (Alces alces)—using previously developed POP-II population models. We developed models for 78 and 100 wolves. For each wolf population, we ran scenarios using wolf predation rates of 9, 12, and 15 ungulates/wolf/year. With 78 wolves and the antlerless elk harvest reduced 27%, our modeled elk population estimated were 5-18% smaller than the model estimate without wolves. With 100 wolves and the antlerless elk harvest reduced 27%, our elk population estimated were 11-30% smaller than the population estimates without wolves. Wolf predation effects were greater on the modeled mule deer population than on elk. With 78 wolves and no antlerless deer harvest, we predicted the mule deer population could be 13-44% larger than without wolves. With 100 wolves and no antlerless deer harvest, the mule deer population was 0-36% larger than without wolves. After wolf recovery, our POP-II models suggested moose harvests would have to be reduced at least 50% to maintain moose numbers at the levels predicted when wolves were not present. Mule deer and moose population data are limited, and these wolf predation effects may be overestimated if population sizes or male-female ratios were underestimated in our population models. We recommend additional mule deer and moose population data be obtained.

  20. Medea in the past and in the present: (Reconstructing the identity of a woman and a foreigner in the novel Medea by Christa Wolf

    Directory of Open Access Journals (Sweden)

    Stevanović Lada

    2010-01-01

    Full Text Available One of the most shocking, the most difficult to understand and at the same time the most inspiring tragedy from the Greek antiquity is Euripeides' Medea. This drama has a rich and a long history of adaptations that have always represented an interface between the ancient text on the one hand, and the author's reading on the other, which always depended on cultural and political context of the period that influenced the perspective of the author. Most of these adaptations belong to theatrical production. However my interest in this paper is not oriented towards theatre, but towards literature, a novel Medea: A Modern Retelling by Christa Wolf. First part of the paper deals with the reconstruction of the ancient context and meaning of this drama in the antiquity from the perspective of contemporary study of classics, while the second part is devoted to the questions of Wolf's adaptation: the ways in which Christa Wolf rewrites Medea, tracing of Wolf's reasons to approach the text in such a way, the main relation of Wolf's version to former version(s, and intellectual and social climate in which Wolf's Medea was created. The focus of the research will be on the reading of the construction of the Other, of gender and gender roles, also through the analysis of their transgression - in the Greek antiquity when Euripides drama was staged, as well in the Germen (European context of the end of the twentieth century in which Medea was rewritten by Christa Wolf.

  1. Efficacy Quotient Tindakan ESWL Piezolith Richard Wolf 3000 pada Penderita Batu Ureter di RSUPN Dr. Cipto Mangunkusumo, 2008–2011

    Directory of Open Access Journals (Sweden)

    Vinny Verdini

    2017-01-01

    Full Text Available Extracorporeal shockwave lithotripsy (ESWL saat ini telah menjadi metode yang paling umum dalam tatalaksana aktif batu ureter. Sejak Maret 2008, RSCM telah menggunakan mesin ESWL piezolith 3000 richard wolf dan belum diketahui nilai efficacy quotient (EQ. Penelitian ini bertujuan untuk menentukan nilai EQ dari tindakan ESWL menggunakan mesin piezolith richard wolf 3000 pada batu ureter dan hubungan angka bebas batu dengan lokasi batu, jumlah batu, beban batu, opasitas batu, obstruksi, dan fungsi ginjal. Studi cross sectional ini dilakukan pada bulan Januari 2008-Desember 2011 dan data dianalisis dengan statistik multivariat. Terdapat 113 (95 % dari 119 pasien yang dinyatakan bebas batu setelah tindakan ESWL pertama. Didapatkan nilai EQ 0,89. Hanya ukuran batu yang mempengaruhi angka bebas batu dalam penelitian ini (p<0,05. Disimpulkan bahwa prosedur ESWL menggunakan mesin richard wolf piezolith 3000 memiliki nilai EQ dan angka bebas batu yang lebih baik daripada mesin-mesin sebelumnya dan mesin lain yang sejenis. Faktor yang mempengaruhi keberhasilan adalah ukuran batu ureter yang ditatalaksana.Kata Kunci: batu ureter, ESWL, efficacy quotient, angka bebas batu. Efficacy Quotient of ESWL Piezolith Richard Wolf 3000 Machine in Patientswith Ureteral Stones in Dr. Cipto MangunkusumoNational Hospital 2008 - 2011AbstractExtracorporeal shockwave lithotripsy (ESWL is the most common method of ureteral stone management. Since 2008, RSCM has ben using ESWL piezolith 3000 richard wolf and efficacy quotient (EQ value have not yet studied. The study aims was to determine the efficacy quotient (EQ of ESWL using piezolith richard wolf 3000 machine for ureteral stone by analyzing free-stone rate with location of stones, number of stones, stone burden, stone opacity, obstruction and kidney function. This cross sectional study was carried out in January 2008-December 2011, with multivariate analytical study. Ninety five percent (n=113 of 119 patients were

  2. The Tibetan Wolf Canis lupus chanco Gray (Mammalia: Carnivora: Canidae in northeastern India with a recent sighting from northern Sikkim, India

    Directory of Open Access Journals (Sweden)

    Anwaruddin Choudhury

    2015-06-01

    Full Text Available The Tibetan Wolf Canis lupus chanco which is a relatively rarer subspecies of the wolf C. lupus occurs in Sikkim in North-east India with unconfirmed reports from Arunachal Pradesh. Its range in Sikkim is in the high elevation areas. There are very few sighting records from the state. This article reports an observation made recently between Thangu and Gyagong or Gogong in North Sikkim district at 4,250m elevation on 17 April 2014. Presence of feral dogs are threats to the Wolf as well as its prey base.  

  3. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Bering Sea, Coastal Waters of Southeast Alaska and British Columbia and others from 1994-11-04 to 1994-12-16 (NCEI Accession 0157274)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157274 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Bering Sea, Coastal Waters of...

  4. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2013-01-03 to 2013-11-15 (NCEI Accession 0157348)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157348 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  5. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2008-01-09 to 2008-08-06 (NCEI Accession 0157386)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157386 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  6. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2006-12-22 to 2007-12-30 (NCEI Accession 0157245)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157245 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  7. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2011-01-22 to 2011-12-11 (NCEI Accession 0157336)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157336 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  8. Partial pressure (or fugacity) of carbon dioxide, temperature, salinity and other variables collected from Surface underway and time series observations using Bubble type equilibrator for autonomous carbon dioxide (CO2) measurement, Carbon dioxide (CO2) gas analyzer and other instruments from the NATHANIEL B. PALMER and ROGER REVELLE in the South Atlantic Ocean and South Pacific Ocean from 1994-11-01 to 1998-04-30 (NODC Accession 0112324)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0112324 includes Surface underway, chemical, meteorological, physical and time series data collected from NATHANIEL B. PALMER and ROGER REVELLE in the...

  9. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2012-03-14 to 2012-09-02 (NCEI Accession 0157397)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157397 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  10. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2005-12-17 to 2006-12-15 (NCEI Accession 0157311)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157311 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  11. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the Coastal Waters of Southeast Alaska and British Columbia, Monterey Bay National Marine Sanctuary and others from 1998-01-16 to 1998-12-17 (NCEI Accession 0157317)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157317 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the Coastal Waters of Southeast...

  12. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 1999-03-06 to 2000-02-10 (NCEI Accession 0157370)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157370 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  13. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2010-01-02 to 2011-01-16 (NCEI Accession 0157259)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157259 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  14. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from NATHANIEL B. PALMER in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2005-01-28 to 2005-12-12 (NCEI Accession 0157262)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NCEI Accession 0157262 includes Surface underway, chemical, meteorological and physical data collected from NATHANIEL B. PALMER in the South Atlantic Ocean, South...

  15. Isotopic anomalies in cosmic rays and winds from Wolf-Rayet stars - a new model

    International Nuclear Information System (INIS)

    Maeder, A.

    1984-01-01

    The insufficiency of the metal-rich supernovae model and of the Wolf-Rayet star model for explaining the isotopic anomalies in the galactic cosmic ray source (GCRS) is examined, and a new model for attacking the anomaly problem is proposed. The main properties of WR stars relevant to the study of GCRS are recalled, with particular emphasis on their chemical excesses and the steep galactic gradient in their distribution. The proposed model assumes that GCRs originate from two main sources of different composition and galactic distribution, probably SN's and WR stars. Their properties may change with galactocentric distance. The relevant physical physicochemical relationships are derived, and some approximations which account for the contributions of WR and SN sources in GCRS are worked out for comparison with observations. The model is found to account very well for the observed anomalies. 33 references

  16. 8-13 μm spectra of very late type Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Aitken, D.K.; Barlow, M.J.; Roche, P.F.; Spenser, P.M.

    1980-01-01

    8 to 13 μm spectra are presented of the late Wolf-Rayet stars, Ve 2-45 (WC9), CRL 2104 (WC8), He 2-113 (WC10) and CPD-56 0 8032 (WC10). Both WC10 stars show the unidentified feature at 11.25 μm and one of them that at 8.6 μm; their spectra resemble those of some planetary nebulae. These features are absent in the WC8/9 stars, whose spectra, together with their infrared photometric data, can be understood in terms of approximately 900 K blackbody spectra subject to some interstellar silicate absorption and with a small excess beyond 10 μm, perhaps due to SiC grains. The WC10 objects are characterized by much lower dust temperatures and their evolutionary status appears to be very different from that of the WC8/9 stars. (author)

  17. Terminal velocities for a large sample of O stars, B supergiants, and Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Prinja, R.K.; Barlow, M.J.; Howarth, I.D.

    1990-01-01

    It is argued that easily measured, reliable estimates of terminal velocities for early-type stars are provided by the central velocity asymptotically approached by narrow absorption features and by the violet limit of zero residual intensity in saturated P Cygni profiles. These estimators are used to determine terminal velocities, v(infinity), for 181 O stars, 70 early B supergiants, and 35 Wolf-Rayet stars. For OB stars, the values are typically 15-20 percent smaller than the extreme violet edge velocities, v(edge), while for WR stars v(infinity) = 0.76 v(edge) on average. New mass-loss rates for WR stars which are thermal radio emitters are given, taking into account the new terminal velocities and recent revisions to estimates of distances and to the mean nuclear mass per electron. The relationships between v(infinity), the surface escape velocities, and effective temperatures are examined. 67 refs

  18. The first detection on Wolf-Rayet stars in M31

    International Nuclear Information System (INIS)

    Shara, M.M.; Moffat, A.F.J.

    1982-01-01

    A search to continuum magnitude B approximately equal to 21.5 (Msub(B) approximately equal to -3) using a narrow band filter at lambda4670A and a wide B-band filter has revealed 21 Wolf-Rayet star candidates in about half the giant Sb galaxy M31. Some weak-line WR stars, particularly WN subtypes, may have escaped detection. These numbers are compatible with the total number of luminous (i.e. massive) stars in M31. Eighteen of twenty confirmed candidate stars in M31 lie in the direction of OB associations in the ring of prominent star formation 5-16 kpc from the center. (Auth.)

  19. Infrared (1.4-4.1μm) spectra of Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Williams, P.M.

    1982-01-01

    The spectra of a variety of Wolf-Rayet stars have been observed with approximately 1% spectral resolution in the 1.4-4.1μm region using UKIRT. Strong lines due to ions of helium and carbon are observed and their relative strengths discussed. The He I singlet at 2.058μm is anomalously strong relative to other He I lines in WC stars and is responsible for the difference in the (H-K) colours of WN and WC stars. Emission line corrections to H, K and L magnitudes of different types are discussed. The Sanduleak O VI star ST 3 shows very strong C IV lines like the WC5 stars but not the strong He I. (Auth.)

  20. Small-scale kinematic structures in ring nebulae around Wolf-Rayet stars

    International Nuclear Information System (INIS)

    Chu, Y.H.

    1988-01-01

    Four ring nebulas around galactic Wolf-Rayet stars have been observed with echelle spectrographs in the long-slit mode: NGC 2359, NGC 3199, NGC 6888, and RCW 58. The spatial resolution of these observations is seeing limited at about 1-3 arcsec, which is almost a two orders of magnitude improvement from the previous Fabry-Perot scanner observations. To avoid large geometric corrections, the slit positions were placed as close to the central stars as possible. The results show that the ejecta-type nebula RCW 58 is a clumpy shell expanding regularly at about 110 km/s, as opposed to the chaotic expansion concluded from the earlier Fabry-Perot observations. For the three windblown bubbles, NGC 2359, NGC 3199, and NGC 6888, the small-scale structures revealed in the echelle data can explain the apparently discrepant expansion velocities derived from the previous large-aperture Fabry-Perot observations. 20 references

  1. Gamma-ray burst progenitors and the population of rotating Wolf-Rayet stars.

    Science.gov (United States)

    Vink, Jorick S

    2013-06-13

    In our quest for gamma-ray burst (GRB) progenitors, it is relevant to consider the progenitor evolution of normal supernovae (SNe). This is largely dominated by mass loss. We discuss the mass-loss rate for very massive stars up to 300M⊙. These objects are in close proximity to the Eddington Γ limit. We describe the new concept of the transitional mass-loss rate, enabling us to calibrate wind mass loss. This allows us to consider the occurrence of pair-instability SNe in the local Universe. We also discuss luminous blue variables and their link to luminous SNe. Finally, we address the polarization properties of Wolf-Rayet (WR) stars, measuring their wind asphericities. We argue to have found a group of rotating WR stars that fulfil the required criteria to make long-duration GRBs.

  2. Tubulopapillary carcinoma of the mammary gland in a maned wolf (Chrysocyon brachyurus: histopathological and immunophenotypical analysis

    Directory of Open Access Journals (Sweden)

    C.O. Gamba

    2011-12-01

    Full Text Available A maned female wolf (Chrysocyon brachyurus showed nodules in the inguinal and left abdominal cranial mammary glands. The mammary gland was surgically excised, and microscopic analysis revealed epithelial cell proliferation in a tubular and papillary pattern; delicate fibrovascular stalks presenting numerous layers of moderately pleomorfic epithelial cells were observed. This histologic appearance was compatible with a diagnosis of mammary tubulopapillary carcinoma. The immunohistochemical profile revealed nuclear positivity for estrogen (70% and progesterone (at least 90% of the neoplastic cells. The myoepithelium-associated with neoplastic cells lacked integrity, as evidenced by failed smooth muscle alpha actin reactivity in microinvasive areas. A low proliferation index was observed (3.4%. To the authors' knowledge, the present case represents the first finding of female tubulopapillary carcinoma in a mammary gland in this species.

  3. Dioctophyma renale in maned wolf in the geoeconomic region of Jatai, GO, Brazil - Case report

    OpenAIRE

    Valcinir Aloisio Scalla Vulcani; Vanessa Sobue Franzo; Diego Pereira de Araújo; Felipen Roncatto Vicenti; Otávio Marins da Costa; Aynna Silva Rangel; Luanna Alves Gomes

    2015-01-01

    ABSTRACT. Vulcani V.A.S., Franzo V.S., de Araújo D.P., Vicentin F.R., da Costa O.M., Rangel A.S. & Gomes L.A. [Dioctophyma renale in maned wolf in the geoeconomic region of Jatai, GO, Brazil - Case report.] Dioctophyma renale em Lobo-Guará na região geoeconômica de Jataí, GO, Brasil - Relato de caso. Revista Brasileira de Medicina Veterinária, 37(2):149-152, 2015. Laboratório de Anatomia, Curso de Medicina Veterinária, Universidade Federal de Goiás, Campus de Jataí, BR 364 Km 192, 3800, Setor...

  4. Oslerus osleri (Cobbold, 1876) infection in maned wolf (Chrysocyon brachyurus, illiger, 1815).

    Science.gov (United States)

    Dias, Rafael Grobério Souto; Legatti, Emerson; Rahal, Sheila Canevese; Teixeira, Carlos Roberto; Ruiz Júnior, Raul Lopes; Rocha, Noeme Sousa; dos Santos, Ivan Felismino Charas; Schmidt, Elizabeth Moreira dos Santos

    2012-09-01

    Oslerus osleri is a small nematode that infects the respiratory tract of domestic and wild canids and is responsible for causing chronic nodular tracheobronchitis. This paper aims to report a case of parasitism by O. osleri in a free-living maned wolf (Chrysocyon brachyurus) that was struck by a motor vehicle. Fecal samples were collected, and the presence of spiral larvae, with "S"-shaped tails, was observed on flotation. This characteristic was compatible with the Filaroididae Family larvae of O. osleri. Although the animal did not show clinical signs of respiratory system impairment, a tracheobronchoscopy was performed. Semitransparent nodules, 5 mm in diameter, containing adult parasites were observed in the third distal portion of the trachea, cranial to the carina. Larval morphological characteristics and the nodular locations were compatible with an O. osleri respiratory tract infection.

  5. A simple ductal mammary papilloma in a male maned wolf (Chrysocyon brachyurus).

    Science.gov (United States)

    Cassali, Geovanni D; Bertagnolli, Angélica C; Ferreira, Enio; Malta, Marcelo C C

    2009-01-01

    A 1-cm-diameter nodule was identified in the left inguinal mammary gland of a 9-year-old male maned wolf (Chrysocyon brachyurus). The mass was surgically excised and examined histologically. Microscopically, the neoplasm consisted of papillary proliferations of epithelial cells on well-defined fibrovascular stalks. A myoepithelial layer was located between the single layer of epithelial cells and the fibrovascular stalk. This histologic appearance was compatible with a diagnosis of simple ductal mammary papilloma. Immunohistochemical staining was positive for p63, cytokeratins AE1/AE3, and estrogen receptors. The clinical and histologic observations in the present case indicate that male maned wolves may develop mammary tumors that are similar to those observed in domestic dogs and humans.

  6. The Lurking Wolf: Qualitative research of existential experiences with lupus in female patients

    DEFF Research Database (Denmark)

    Larsen, Janni Lisander; Jacobsen, Søren; Hall, Elisabeth

    of existential experiences over time in female patients suffering from Lupus. Method: Three 3 qualitative indept interviews with 15 women is planned during 1½ year. First and second round is performed, and third is planned during spring 2015. Interviews are guided by Van Manens life world existentials (time...... to withdraw their consent, and to choose time and place for the interviewing. Results: Interpretation on the existential meaning is in progress. Preliminary results document that the chaotic time of the diagnosis gradually changes over the years, leaving a mark on their existential life. Experiencing......THE LURKING OF THE WOLF- QUALITATIVE RESARCH OF EXISTENTIAL EXPERIENCES WITH LUPUS IN FEMALE PATIENTS. J. Lisander Larsen (1, 2), S. Jacobsen (2), E.O. C. Hall (1), R. Birkelund(3) (1) Department of Public Health, Aarhus University, Section for Nursing, Denmark. (2) University Hospital...

  7. Spectrophotometry of Wolf-Rayet stars - Intrinsic colors and absolute magnitudes

    Science.gov (United States)

    Torres-Dodgen, Ana V.; Massey, Philip

    1988-01-01

    Absolute spectrophotometry of about 10-A resolution in the range 3400-7300 A have been obtained for southern Wolf-Rayet stars, and line-free magnitudes and colors have been constructed. The emission-line contamination in the narrow-band ubvr systems of Westerlund (1966) and Smith (1968) is shown to be small for most WN stars, but to be quite significant for WC stars. It is suggested that the more severe differences in intrinsic color from star to star of the same spectral subtype noted at shorter wavelengths are due to differences in atmospheric extent. True continuum absolute visual magnitudes and intrinsic colors are obtained for the LMC WR stars. The most visually luminous WN6-WN7 stars are found to be located in the core of the 30 Doradus region.

  8. Disease, food and reproduction of the maned wolf: Chrysocyon Brachyurus (Illiger (Carnivora, Canidae in southeast Brazil

    Directory of Open Access Journals (Sweden)

    Cory T. de Carvalho

    1995-09-01

    Full Text Available The most frequent endoparasite of the Maned wolf - Chrysocyon brachyurus (Illiger, 1815 is the giant kidney-worm. Dioctophyma renale (Goeze, 1782. It has heen responsible for the majority of deaths of captive animals. Twenty-six marked wolves have been followed in the field with ear-tags and radio-collar tagged (Tab. II to investigate their interactions with the environment, their diurnal shelters, movements and habits, and their delivery sites. Ten years of life history data have heen gathered. They are territorial and monogamous, and give birth to two or three young once a year, after a 63 days gestation, on average. Maned wolves inhabit the open areas and have omnivorous feeding habits.

  9. Prenatal diagnosis of Wolf-Hirschhorn syndrome: Ultrasonography and molecular karyotyping results.

    Science.gov (United States)

    Zhen, Li; Fan, Shu-Shu; Huang, Lv-Yin; Pan, Min; Han, Jin; Yang, Xin; Li, Dong-Zhi

    2018-03-31

    To present the experience on prenatal diagnosis of Wolf-Hirschhorn syndrome (WHS) to further delineate the fetal presentation of this syndrome. This was a retrospective analysis of ten pregnancies with fetal WHS identified by chromosomal microarray (CMA). Clinical data were reviewed for these cases, including maternal demographics, indications for invasive testing, sonographic findings, CMA results and pregnancy outcomes. Three cases were diagnosed at the first trimester because of an increased NT or cystic hygroma. The remaining seven cases were identified at late gestation for abnormal ultrasound findings. CMA revealed 4p deletions to be terminal in all of the ten cases. Deletion sizes ranged from 2.05 to 19.02 Mb. Prenatal findings such as increased NT, severe and early onset intrauterine growth retardation, and renal dysplasia or oligohydramnios should warrant the diagnosis of WHS and invasive testing using CMA. Copyright © 2018 Elsevier B.V. All rights reserved.

  10. Wolf-Hirschhorn Syndrome Candidate 1 Is Necessary for Correct Hematopoietic and B Cell Development.

    Science.gov (United States)

    Campos-Sanchez, Elena; Deleyto-Seldas, Nerea; Dominguez, Veronica; Carrillo-de-Santa-Pau, Enrique; Ura, Kiyoe; Rocha, Pedro P; Kim, JungHyun; Aljoufi, Arafat; Esteve-Codina, Anna; Dabad, Marc; Gut, Marta; Heyn, Holger; Kaneda, Yasufumi; Nimura, Keisuke; Skok, Jane A; Martinez-Frias, Maria Luisa; Cobaleda, Cesar

    2017-05-23

    Immunodeficiency is one of the most important causes of mortality associated with Wolf-Hirschhorn syndrome (WHS), a severe rare disease originated by a deletion in chromosome 4p. The WHS candidate 1 (WHSC1) gene has been proposed as one of the main genes responsible for many of the alterations in WHS, but its mechanism of action is still unknown. Here, we present in vivo genetic evidence showing that Whsc1 plays an important role at several points of hematopoietic development. Particularly, our results demonstrate that both differentiation and function of Whsc1-deficient B cells are impaired at several key developmental stages due to profound molecular defects affecting B cell lineage specification, commitment, fitness, and proliferation, demonstrating a causal role for WHSC1 in the immunodeficiency of WHS patients. Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.

  11. Widening the clinical spectrum of Pitt-Rogers-Danks/Wolf-Hirschhorn syndromes

    Directory of Open Access Journals (Sweden)

    Juliana F. Mazzeu

    2007-03-01

    Full Text Available Chromosomal rearrangements involving partial deletion of the short arm of chromosome 4 and partial duplication of the short arm of chromosome 8 have been described both in Pitt-Rogers-Danks syndrome (PRDS and Wolf-Hirschhorn syndrome (WHS, the former being considered a milder phenotype of the latter. We describe a patient with partial deletion of chromosome 4 and partial duplication of chromosome 8 documented by array-comparative genomic hybridization (Array-CGH. In addition to the typical features of PRDS, the patient exhibited some clinical signs (genital hypoplasia, radioulnar synostosis and mesomelic limb shortness infrequently, or never previously, reported in PRDS. These findings broaden the spectrum of anomalies generally associated with these syndromes.

  12. A case of Wolf-Hirschhorn syndrome and hypoplastic left heart syndrome.

    Science.gov (United States)

    von Elten, Kelley; Sawyer, Taylor; Lentz-Kapua, Sarah; Kanis, Adam; Studer, Matthew

    2013-06-01

    Wolf-Hirschhorn Syndrome (WHS) is a genetic syndrome that includes a typical facial appearance, mental retardation, growth delay, seizures, and congenital cardiac defects. A deletion of the terminal band of the short arm of chromosome 4, with a breakpoint at the 4p15 to 4p16 region, is the most common genetic mutation causing WHS. Congenital heart disease associated with WHS typically includes atrial and ventricular septal defects, though there are a few case reports of associated complex congenital heart disease. Here we report a case of an infant with a large 4p deletion, with a breakpoint at the 4p12 region, and hypoplasic left heart syndrome. We discuss a possible link between the size of the chromosomal deletion in WHS and the severity of the cardiac defect.

  13. Wolf-Hirschhorn Syndrome Candidate 1 Is Necessary for Correct Hematopoietic and B Cell Development

    Directory of Open Access Journals (Sweden)

    Elena Campos-Sanchez

    2017-05-01

    Full Text Available Immunodeficiency is one of the most important causes of mortality associated with Wolf-Hirschhorn syndrome (WHS, a severe rare disease originated by a deletion in chromosome 4p. The WHS candidate 1 (WHSC1 gene has been proposed as one of the main genes responsible for many of the alterations in WHS, but its mechanism of action is still unknown. Here, we present in vivo genetic evidence showing that Whsc1 plays an important role at several points of hematopoietic development. Particularly, our results demonstrate that both differentiation and function of Whsc1-deficient B cells are impaired at several key developmental stages due to profound molecular defects affecting B cell lineage specification, commitment, fitness, and proliferation, demonstrating a causal role for WHSC1 in the immunodeficiency of WHS patients.

  14. Auditory hair cell defects as potential cause for sensorineural deafness in Wolf-Hirschhorn syndrome.

    Science.gov (United States)

    Ahmed, Mohi; Ura, Kiyoe; Streit, Andrea

    2015-09-01

    WHSC1 is a histone methyltransferase (HMT) that catalyses the addition of methyl groups to lysine 36 on histone 3. In humans, WHSC1 haploinsufficiency is associated with all known cases of Wolf-Hirschhorn syndrome (WHS). The cardinal feature of WHS is a craniofacial dysmorphism, which is accompanied by sensorineural hearing loss in 15% of individuals with WHS. Here, we show that WHSC1-deficient mice display craniofacial defects that overlap with WHS, including cochlea anomalies. Although auditory hair cells are specified normally, their stereocilia hair bundles required for sound perception fail to develop the appropriate morphology. Furthermore, the orientation and cellular organisation of cochlear hair cells and their innervation are defective. These findings identify, for the first time, the likely cause of sensorineural hearing loss in individuals with WHS. © 2015. Published by The Company of Biologists Ltd.

  15. Morphological characterization of the venom apparatus in the wolf spider Lycosa singoriensis (Laxmann, 1770

    Directory of Open Access Journals (Sweden)

    N Yigit

    2009-01-01

    Full Text Available The wolf spider Lycosa singoriensis (Laxmann, 1770 (Lycosidae: Araneae is distributed throughout central and eastern Europe, including Russia, Kazakhistan and Turkey. This study describes the venom apparatus morphology of L. singoriensis through scanning electron microscopy (SEM. Its structure follows the general architecture observed in other spiders. Generally, a venom apparatus is composed by a pair of venom glands and chelicerae. L. singoriensis chelicerae are robust and consist of a stout basis and a movable apical segment (fang. The fang rests in a groove on the basal segment that is covered by different types of hair. L. singoriensis venom glands present equal size and measure about 4 mm in length. Each gland is enclosed by irregular muscular layers.

  16. Those who 'Cry Wolf' about nuclear safety damage their own credibility

    Energy Technology Data Exchange (ETDEWEB)

    Shepherd, John [nuclear 24, Redditch (United Kingdom)

    2016-06-15

    Do you recall the fable of the boy who cried wolf? I was reminded of this following the latest call by Germany's Federal Environment Minister, Barbara Hendricks, for Belgium to take two of its nuclear reactors off the grid, citing ''questions'' about the units' safety. Those in positions of power and influence in one country should take care to be as responsible in their dealings with their neighbours as they are in handling domestic matters of state. Those who see 'danger' where there is none are not being good neighbours. They are generating fear and alarm without good cause and should mind their own business.

  17. A new nonlinear conjugate gradient coefficient under strong Wolfe-Powell line search

    Science.gov (United States)

    Mohamed, Nur Syarafina; Mamat, Mustafa; Rivaie, Mohd

    2017-08-01

    A nonlinear conjugate gradient method (CG) plays an important role in solving a large-scale unconstrained optimization problem. This method is widely used due to its simplicity. The method is known to possess sufficient descend condition and global convergence properties. In this paper, a new nonlinear of CG coefficient βk is presented by employing the Strong Wolfe-Powell inexact line search. The new βk performance is tested based on number of iterations and central processing unit (CPU) time by using MATLAB software with Intel Core i7-3470 CPU processor. Numerical experimental results show that the new βk converge rapidly compared to other classical CG method.

  18. A Dantzig-Wolfe decomposition algorithm for linear economic model predictive control of dynamically decoupled subsystems

    DEFF Research Database (Denmark)

    Sokoler, Leo Emil; Standardi, Laura; Edlund, Kristian

    2014-01-01

    This paper presents a warm-started Dantzig–Wolfe decomposition algorithm tailored to economic model predictive control of dynamically decoupled subsystems. We formulate the constrained optimal control problem solved at each sampling instant as a linear program with state space constraints, input...... limits, input rate limits, and soft output limits. The objective function of the linear program is related directly to the cost of operating the subsystems, and the cost of violating the soft output constraints. Simulations for large-scale economic power dispatch problems show that the proposed algorithm...... is significantly faster than both state-of-the-art linear programming solvers, and a structure exploiting implementation of the alternating direction method of multipliers. It is also demonstrated that the control strategy presented in this paper can be tuned using a weighted ℓ1-regularization term...

  19. The Wolf-Rayet nebula NGC 6888 as a pressure driven bubble

    International Nuclear Information System (INIS)

    Marston, A.P.; Meaburn, J.

    1988-01-01

    Profiles of the Hα and [NII] emission lines have been obtained across the major axis of the Wolf-Rayet ring nebula NGC6888 with the Manchester echelle spectrometer combined with the Isaac Newton Telescope. Although triple profiles are found, this nebula is shown to approximate to a shell of radius 3pc expanding at 85 km s -1 . The ionized mass in the shell is 3.5 ± 1.2 M solar masses . IRAS survey maps also reveal a shell of neutral material containing 40 M solar masses , assuming the far infrared continuum emission from warm dust dominates the line emission. If it is assumed that this mass is also expanding at 85 km s -1 it is shown that the nebula is a pressure driven bubble, which conserves the kinetic energy of the driving stellar wind. (author)

  20. [Professor Andelko Wolf, MD, PhD. (1922-2007), eminent epidemiologist and dermatovenerologist].

    Science.gov (United States)

    Gruber, Franjo; Peris, Zdravko

    2009-01-01

    Professor Andelko Wolf graduated medicine from the University of Zagreb School of Medicine in 1947. First he specialised in epidemiology and became head of the Brucellosis Centre in Rijeka for the Istria region. Later he also specialised in dermatovenerology at the Department for Skin and Venereal diseases in Rijeka. He passed the specialty board exam in dermatovenerology in 1958 and became teaching assistant. In 1973, he became assistant professor and in 1981 full professor. At the Department he founded the Laboratory for Mycology and allergology. Later he focused on occupational skin diseases and photodermatology. His doctoral thesis was on the action of light on the skin. He chaired the Clinic and was a member of various Hospital and Medical School committees. He was an excellent clinician undergraduate and graduate student teacher in Rijeka and Zagreb. He published around eighty papers on dermatology, but also on the necessity to reform medical studies.

  1. Encrypted Jihad: Investigating the Role of Telegram App in Lone Wolf Attacks in the West

    Directory of Open Access Journals (Sweden)

    Ahmad Shehabat

    2017-10-01

    Full Text Available The study aims to capture links between the use of encrypted communication channel -Telegram and lone wolf attacks occurred in Europe between 2015-2016. To understand threads of ISIS communication on Telegram we used digital ethnography approach which consists of the self-observation of information flows on four of ISIS’s most celebrated telegram Channels. We draw on public sphere theory and coined the term terror socio-sphere 3.0 as the theoretical background of this study. The collected data is presented as screenshots to capture a visual evidence of ISIS communication threads. This study shows that ISIS Telegram channels play critical role in personal communication between potential recruits and dissemination of propaganda that encourage ‘lone wolves’ to carry attacks in the world at large. This study was limited to the number of the channels that have been widely celebrated.

  2. Dynamic Modeling of Steam Condenser and Design of PI Controller Based on Grey Wolf Optimizer

    Directory of Open Access Journals (Sweden)

    Shu-Xia Li

    2015-01-01

    Full Text Available Shell-and-tube condenser is a heat exchanger for cooling steam with high temperature and pressure, which is one of the main kinds of heat exchange equipment in thermal, nuclear, and marine power plant. Based on the lumped parameter modeling method, the dynamic mathematical model of the simplified steam condenser is established. Then, the pressure PI control system of steam condenser based on the Matlab/Simulink simulation platform is designed. In order to obtain better performance, a new metaheuristic intelligent algorithm, grey wolf optimizer (GWO, is used to realize the fine-tuning of PI controller parameters. On the other hand, the Z-N engineering tuning method, genetic algorithm, and particle swarm algorithm are adopted for tuning PI controller parameters and compared with GWO algorithm. Simulation results show that GWO algorithm has better control performance than other four algorithms.

  3. Distal 4p microdeletion in a case of Wolf-Hirschhorn syndrome with congenital diaphragmatic hernia.

    Science.gov (United States)

    Casaccia, Germana; Mobili, Luisa; Braguglia, Annabella; Santoro, Francesco; Bagolan, Pietro

    2006-03-01

    Wolf-Hirschhorn syndrome (WHS) is a well-known genetic condition characterized by typical facial anomalies, midline defects, skeletal anomalies, prenatal and postnatal growth retardation, hypotonia, mental retardation, and seizures. Affected patients with a microdeletion on distal 4p present a milder phenotype that lacks congenital malformations. WHS is rarely associated with congenital diaphragmatic hernia (CDH), and only 8 cases are reported in the literature. In almost all cases of CDH and WHS a large deletion of the short arm of chromosome 4 is present. A microdeletion of 2.6 Mb on distal 4p associated with CDH and multiple congenital malformations (i.e., cleft palate) is reported for the first time. Such a microdeletion should prompt a molecular study for WHS when in a fetus/newborn with CDH the association with cleft lip/palate and typical facial appearance (flat facial profile, hypertelorism) is found. Copyright 2006 Wiley-Liss, Inc.

  4. Seizure and EEG patterns in Wolf-Hirschhorn (4p-) syndrome.

    Science.gov (United States)

    Battaglia, Agatino; Carey, John C

    2005-08-01

    Wolf-Hirschhorn syndrome (WHS) is a well-characterized chromosomal disorder that occurs due to partial deletion of the short arm of chromosome 4 (4p-). Although, about 300 cases have been reported to date, limited data are available on electroclinical findings. Information given to parents at the time of diagnosis tends to be skewed to the extreme negative. To delineate the natural history of seizures and EEG patterns in WHS, and obtain better information on diagnosis or outcome in a clinical setting, we reviewed the available literature on electroclinical findings of WHS. 4p- syndrome is characterized by distinctive seizure and EEG patterns that facilitate the early diagnosis and management of such patients.

  5. An Efficient Hybrid Conjugate Gradient Method with the Strong Wolfe-Powell Line Search

    Directory of Open Access Journals (Sweden)

    Ahmad Alhawarat

    2015-01-01

    Full Text Available Conjugate gradient (CG method is an interesting tool to solve optimization problems in many fields, such as design, economics, physics, and engineering. In this paper, we depict a new hybrid of CG method which relates to the famous Polak-Ribière-Polyak (PRP formula. It reveals a solution for the PRP case which is not globally convergent with the strong Wolfe-Powell (SWP line search. The new formula possesses the sufficient descent condition and the global convergent properties. In addition, we further explained about the cases where PRP method failed with SWP line search. Furthermore, we provide numerical computations for the new hybrid CG method which is almost better than other related PRP formulas in both the number of iterations and the CPU time under some standard test functions.

  6. Modelling of radiocesium transfer in the lichen-reindeer/caribou-wolf food chain

    Directory of Open Access Journals (Sweden)

    D. F. Holleman

    1990-09-01

    Full Text Available The environmental contaminate radiocesium (cesium-137 has been shown to be of value as a marker in food selection and intake studies. Its greatest potential value as a food marker is in the subarctic/arctic regions, particularly in the lichen to reindeer/caribou to wolf food chain. A kinetic model describing the movement of radiocesium through the food chain has been developed using the SAAM computer program and is presented here. The program has been written so that the various paramenters affecting the transfer of radiocesium in the food chain can be altered more realistically to describe the system being modeled. The values of the parameters as given in this example are realistic for interior Alaska, however caution should be exercised in the application of the present results to regions that may be vastly different from the Alaskan interior without first evaluating the parameters and assumptions of the model.

  7. Autobiography, autofiction, metafiction and literature. The case of Stadt der Engel by Christa Wolf

    Directory of Open Access Journals (Sweden)

    Celeste Ribeiro de Sousa

    2014-06-01

    Full Text Available O tema da obra Stadt der Engel, de Christa Wolf (1929-2011, gira em torno da problemática apreensão do real nos dias de hoje. Há nesta obra, publicada em 2010, uma ação curta e irrelevante que constitui, contudo, uma moldura narrativa a sustentar todos os discursos presentes no texto: o romanesco, o histórico, o autobiográfico. Há até a presença surreal de um anjo protetor que ajuda a protagonista a suportar as vicissitudes de uma estrangeira em terras estranhas e, em particular, a descoberta de seu passado como membro colaborador informal da outrora polícia secreta da DDR (Stasi. Este ensaio objetiva mostrar como todos esses discursos se articulam na forma de um tecido literário.

  8. Auditory hair cell defects as potential cause for sensorineural deafness in Wolf-Hirschhorn syndrome

    Directory of Open Access Journals (Sweden)

    Mohi Ahmed

    2015-09-01

    Full Text Available WHSC1 is a histone methyltransferase (HMT that catalyses the addition of methyl groups to lysine 36 on histone 3. In humans, WHSC1 haploinsufficiency is associated with all known cases of Wolf-Hirschhorn syndrome (WHS. The cardinal feature of WHS is a craniofacial dysmorphism, which is accompanied by sensorineural hearing loss in 15% of individuals with WHS. Here, we show that WHSC1-deficient mice display craniofacial defects that overlap with WHS, including cochlea anomalies. Although auditory hair cells are specified normally, their stereocilia hair bundles required for sound perception fail to develop the appropriate morphology. Furthermore, the orientation and cellular organisation of cochlear hair cells and their innervation are defective. These findings identify, for the first time, the likely cause of sensorineural hearing loss in individuals with WHS.

  9. Discovery of a New Wolf-Rayet Star Using SAGE-LMC

    Science.gov (United States)

    Gvaramadze, V. V.; Chené, A.-N.; Kniazev, A. Y.; Schnurr, O.

    2012-12-01

    We report the first-ever discovery of an extragalactic Wolf-Rayet (WR) star with Spitzer. A new WR star in the Large Magellanic Cloud (LMC) was revealed via detection of its circumstellar shell using 24 μm images obtained in the framework of the Spitzer Survey of the Large Magellanic Cloud (SAGE-LMC). Subsequent spectroscopic observations with the Gemini South resolved the central star in two components, one of which is a WN3b+abs star, while the second one is a B0 V star. We consider the lopsided brightness distribution over the circumstellar shell as an indication that the WR star is a runaway and use this interpretation to identify a possible parent cluster of the star.

  10. Grey Wolf Optimizer Based on Powell Local Optimization Method for Clustering Analysis

    Directory of Open Access Journals (Sweden)

    Sen Zhang

    2015-01-01

    Full Text Available One heuristic evolutionary algorithm recently proposed is the grey wolf optimizer (GWO, inspired by the leadership hierarchy and hunting mechanism of grey wolves in nature. This paper presents an extended GWO algorithm based on Powell local optimization method, and we call it PGWO. PGWO algorithm significantly improves the original GWO in solving complex optimization problems. Clustering is a popular data analysis and data mining technique. Hence, the PGWO could be applied in solving clustering problems. In this study, first the PGWO algorithm is tested on seven benchmark functions. Second, the PGWO algorithm is used for data clustering on nine data sets. Compared to other state-of-the-art evolutionary algorithms, the results of benchmark and data clustering demonstrate the superior performance of PGWO algorithm.

  11. On the rarity of X-ray binaries with Wolf-Rayet donors

    Energy Technology Data Exchange (ETDEWEB)

    Linden, T. [Univ. of California, Santa Cruz, CA (United States); Fermi National Accelerator Lab., Batavia, IL (United States); Valsecchi, F. [Northwestern Univ., Evanston, IL (United States); Kalogera, V. [Northwestern Univ., Evanston, IL (United States)

    2012-03-14

    The paucity of High mass X-Ray binaries (HMXB) consisting of a neutron star (NS) accretor and Wolf-Rayet (WR) donor has long been at odds with expectations from population synthesis studies indicating that these systems should survive as the evolved offspring of the observed HMXB population. This tension is particularly troubling in light of recent observations uncovering a preponderance of HMXBs containing loosely bound Be donors which would be expected to naturally evolve into WR-HMXBs. Reconciling the unexpectedly large population of Be-HMXBs with the lack of observed WR-HMXB sources thus serves to isolate the dynamics of CE physics from other binary evolution parameters. We find that binary mergers during CE events must be common in order to resolve tension between these observed populations. Furthermore, future observations which better constrain the background population of loosely bound O/B-NS binaries are likely to place significant constraints on the efficiency of CE removal.

  12. Estrellas Wolf-Rayet y el medio interestelar: huellas de una fuerte interacción

    Science.gov (United States)

    Cichowolski, S.; Arnal, E. M.

    Se presentan resultados observacionales de un estudio de la distribución de hidrógeno neutro en los alrededores de estrellas Wolf-Rayet (WR) galácticas. Los datos de la línea de 21 cm provienen de observaciones de resolución angular intermedia (9') tomadas con el radiotelescopio de Effelsberg. La muestra está compuesta por cuatro WR de la serie del nitrógeno (WN): WR130, WR131, WR155, WR156 y tres WR de la serie del carbono (WC): WR154, WR117 y WR126. Este análisis ha permitido detectar cavidades y envolturas de HI en expansión presumiblemente vinculadas a dichas estrellas.

  13. Wolf-Rayet stars in the central region of the Milky Way

    Science.gov (United States)

    Hamann, Wolf-Rainer; Graefener, Goetz; Oskinova, Lidia; Zinnecker, Hans

    2004-09-01

    We propose to take mid-IR spectra of two Wolf-Rayet stars in the inner part of our Galaxy, within 30pc projected distance from the central Black Hole. Massive stars dominate the central galactic region by their mass-loss and ionizing radiation. A quantitative analysis of this stellar inventory is essential for understanding the energy, momentum and mass budget, for instance with respect to the feeding of the central black hole. Our group developed a highly advanced model code for the expanding atmospheres of WR stars. Recently we extended the spectrum synthesis to IR wavelengths. These models will be applied for the analysis of the Spitzer IRS data. The proposed mid-IR observations will provide a wide spectral range with many lines which are needed to determine the stellar parameters, such as stellar luminosity, effective temperature, mass-loss rate and chemical composition. Near-IR spectra of the program stars are available and will augment the analysis. The capability of our code to reproduce the observed mid-IR spectrum of a WN star has been demonstrated. The two targets we selected are sufficiently isolated, while the Galactic center cluster is too crowded for the size of Spitzer's spectrograph slit. As estimated from the K-band spectra, one of the stars (WR102ka) is of very late subtype (WN9), while the other star (WR102c) has the early subtype WN6. Hence they represent different stages in the evolutionary sequence of massive stars, the late-WN just having entered the Wolf-Rayet phase and the early WN being further evolved. We expect that the parameters of massive stars in the inner galaxy differ from the usual Galactic population. One reason is that higher metallicity should lead to stronger mass-loss, which affects the stellar evolution. The Spitzer IRS, with its high sensitivity, provides a unique opportunity to study representative members of the stellar population in the vicinity of the Galactic center.

  14. Near-Infrared Keck Interferometer and IOTA Closure Phase Observations of Wolf-Rayet stars

    Science.gov (United States)

    Rajagopal, J.; Wallace, D.; Barry, R.; Richardson, L. J.; Traub, W.; Danchi, W. C.

    We present first results from observations of a small sample of IR-bright Wolf-Rayet stars with the Keck Interferometer in the near-infrared, and with the IONIC beam three-telescope beam combiner at the Infrared and Optical Telescope Array (IOTA) observatory. The former results were obtained as part of shared-risk observations in commissioning the Keck Interferometer and form a subset of a high-resolution study of dust around Wolf-Rayet stars using multiple interferometers in progress in our group. The latter results are the first closure phase observations of these stars in the near-infrared in a separated telescope interferometer. Earlier aperture-masking observations with the Keck-I telescope provide strong evidence that dust-formation in late-type WC stars are a result of wind-wind collision in short-period binaries.Our program with the Keck interferometer seeks to further examine this paradigm at much higher resolution. We have spatially resolved the binary in the prototypical dusty WC type star WR 140. WR 137, another episodic dust-producing star, has been partially resolved for the first time, providing the first direct clue to its possible binary nature.We also include WN stars in our sample to investigate circumstellar dust in this other main sub-type of WRs. We have been unable to resolve any of these, indicating a lack of extended dust.Complementary observations using the MIDI instrument on the VLTI in the mid-infrared are presented in another contribution to this workshop.

  15. An IRAS-Based Search for New Dusty Late-Type WC Wolf-Rayet Stars

    Science.gov (United States)

    Cohen, Martin

    1995-01-01

    I have examined all Infrared Astronomical Satellite (IRAS) data relevant to the 173 Galactic Wolf-Rayet (W-R) stars in an updated catalog, including the 13 stars newly discovered by Shara and coworkers. Using the W-R coordinates in these lists, I have examined the IRAS Point Source Catalog (PSC), the Faint Source Catalog, and the Faint Source Reject Catalog, and have generated one-dimensional spatial profiles, 'ADDSCANs', and two-dimensional full-resolution images, 'FRESCOS'. The goal was to assemble the best set of observed IRAS color indices for different W-R types, in particular for known dusty late-type WC Wolf-Rayet (WCL) objects. I have also unsuccessfully sought differences in IRAS colors and absolute magnitudes between single and binary W-R stars. The color indices for the entire ensemble of W-R stars define zones in the IRAS color-color ([12] - [25], [25] - [60])-plane. By searching the PSC for otherwise unassociated sources that satisfy these colors, I have identified potential new W-R candidates, perhaps too faint to have been recognized in previous optical searches. I have extracted these candidates' IRAS low-resolution spectrometer (LRS) data and compared the spectra with the highly characteristic LRS shape for known dusty WCL stars. The 13 surviving candidates must now be ex amined by optical spectroscopy. This work represents a much more rigorous and exhaustive version of the LRS study that identified IRAS 17380 - 3031 (WR98a) as the first new W-R (WC9) star discovered by IPAS. This search should have detected dusty WCL stars to a distance of 7.0 kpc from the Sun, for l is greater than 30 degrees, and to 2.9 kpc even in the innermost galaxy. For free-free-dominated W-R stars the corresponding distances are 2.5 and 1.0 kpc, respectively.

  16. Diagnosis and fine localization of deletion region in Wolf-Hirschhorn syndrome patients.

    Science.gov (United States)

    Ji, Tao-Yun; Chia, David; Wang, Jing-Min; Wu, Ye; Li, Jie; Xiao, Jing; Jiang, Yu-Wu

    2010-07-01

    Wolf-Hirschhorn syndrome (WHS) results from the partial deletion of 4p. This study aimed to identify and fine map the chromosome deletion regions of Chinese children with Wolf-Hirschhorn syndrome among the developmental delay/mental retardation (DD/MR) patients. We analyzed the relationship of phenotype and genotype. Inclusion criteria were: moderate to severe DD/MR, no definite perinatal brain injury, and no trauma, toxication, hypoxia, infection of central nervous system; routine karyotyping was normal, no evidence of typical inherited metabolic disorder or specific neurodegenerative disorders from cranial neuro-imaging and blood/urinary metabolic diseases screening; no mutation of FMR1 in male patients, no typical clinical manifestation of Rett syndrome in female patients. Multiplex ligation-dependent probe amplification (MLPA) and Affymetrix genome-wide human SNP array 6.0 assays were applied to accurately define the exact size of subtelomeric aberration region of four WHS patients. All four WHS patients presented with severe DD, hypotonia and microcephaly, failure to thrive, 3/4 patients with typical facial features and seizures, 2/4 patients with congenital heart defects and cleft lip/palate, 1/4 patients with other malformations. The length of the deletions ranged from 3.3 Mb to 9.8 Mb. Two of four patients had "classic" WHS, 1/4 patients had "mild"-to-"classic" WHS, and 1/4 patients had "mild" WHS. WHS patients in China appear to be consistent with those previously reported. The prevalence of signs and symptoms, distribution of cases between "mild" and "classic" WHS, and the correlation between length of deletion and severity of disease of these patients were all similar to those of the patients from other populations.

  17. Computational modelling of string body interaction for the violin family and simulation of wolf notes

    Science.gov (United States)

    Inácio, O.; Antunes, J.; Wright, M. C. M.

    2008-02-01

    Most theoretical studies of bowed-string instruments deal with isolated strings, pinned on fixed supports. In others, the instrument body dynamics have been accounted by using extremely simplified models of the string-body interaction through the instrument bridge. Such models have, nevertheless, been instrumental to the understanding of a very common and musically undesirable phenomenon known as the wolf note—a strong beating interplay between string and body vibrations. Cellos, bad and good, are particularly prone to this problem. In previous work, a computational method that allows efficient time-domain modelling of bowed strings based on a modal approach has been introduced. This has been extended to incorporate the complex dynamics of real-life instrument bodies, and their coupling to the string motions, using experimental dynamical body data. The string is modelled using its unconstrained modes, assuming pinned-pinned boundary conditions at the tailpiece and the nut. At the intermediary bridge location, the string-body coupling is enforced using the body impulse-response or modal data, as measured at the instrument bridge. In the present paper, this computational approach is applied to a specific cello, which provided experimental wolf-behaviour data under several bowing conditions, as well as laboratory measurements of the bridge impulse responses on which the numerical simulations were based. Interesting aspects of the string-body dynamical responses are highlighted by numerical simulations and the corresponding sounds and animations produced. Finally, a qualitative (and, when possible, quantitative) comparison of the experimental and numerical results is presented.

  18. A new Wolf-Rayet star and its circumstellar nebula in Aquila

    Science.gov (United States)

    Gvaramadze, V. V.; Kniazev, A. Y.; Hamann, W.-R.; Berdnikov, L. N.; Fabrika, S.; Valeev, A. F.

    2010-04-01

    We report the discovery of a new Wolf-Rayet star in Aquila via detection of its circumstellar nebula (reminiscent of ring nebulae associated with late WN stars) using the Spitzer Space Telescope archival data. Our spectroscopic follow-up of the central point source associated with the nebula showed that it is a WN7h star (we named it WR121b). We analysed the spectrum of WR121b by using the Potsdam Wolf-Rayet model atmospheres, obtaining a stellar temperature of ~=50kK. The stellar wind composition is dominated by helium with ~20 per cent of hydrogen. The stellar spectrum is highly reddened [E(B - V) = 2.85mag]. Adopting an absolute magnitude of Mv = -5.7, the star has a luminosity of logL/Lsolar = 5.75 and a mass-loss rate of 10-4.7Msolaryr-1, and resides at a distance of 6.3kpc. We searched for a possible parent cluster of WR121b and found that this star is located at ~=1° from the young star cluster embedded in the giant HII region W43 (containing a WN7+a/OB? star - WR121a). We also discovered a bow shock around the O9.5III star ALS9956, located at from the cluster. We discuss the possibility that WR121b and ALS9956 are runaway stars ejected from the cluster in W43. Based on observations collected at the German-Spanish Astronomical Center, Calar Alto, jointly operated by the Max-Planck-Institut für Astronomie Heidelberg and the Instituto de Astrofísica de Andalucía (CSIC). E-mail: vgvaram@mx.iki.rssi.ru (VVG); akniazev@saao.ac.za (AYK); wrh@astro.physik.uni-potsdam.de (WRH); berdnik@sai.msu.ru (LNB); fabrika@sao.ru (SF); azamat@sao.ru (AFV)

  19. Hypoxia adaptations in the grey wolf (Canis lupus chanco) from Qinghai-Tibet Plateau.

    Science.gov (United States)

    Zhang, Wenping; Fan, Zhenxin; Han, Eunjung; Hou, Rong; Zhang, Liang; Galaverni, Marco; Huang, Jie; Liu, Hong; Silva, Pedro; Li, Peng; Pollinger, John P; Du, Lianming; Zhang, XiuyYue; Yue, Bisong; Wayne, Robert K; Zhang, Zhihe

    2014-07-01

    The Tibetan grey wolf (Canis lupus chanco) occupies habitats on the Qinghai-Tibet Plateau, a high altitude (>3000 m) environment where low oxygen tension exerts unique selection pressure on individuals to adapt to hypoxic conditions. To identify genes involved in hypoxia adaptation, we generated complete genome sequences of nine Chinese wolves from high and low altitude populations at an average coverage of 25× coverage. We found that, beginning about 55,000 years ago, the highland Tibetan grey wolf suffered a more substantial population decline than lowland wolves. Positively selected hypoxia-related genes in highland wolves are enriched in the HIF signaling pathway (P = 1.57E-6), ATP binding (P = 5.62E-5), and response to an oxygen-containing compound (P≤5.30E-4). Of these positively selected hypoxia-related genes, three genes (EPAS1, ANGPT1, and RYR2) had at least one specific fixed non-synonymous SNP in highland wolves based on the nine genome data. Our re-sequencing studies on a large panel of individuals showed a frequency difference greater than 58% between highland and lowland wolves for these specific fixed non-synonymous SNPs and a high degree of LD surrounding the three genes, which imply strong selection. Past studies have shown that EPAS1 and ANGPT1 are important in the response to hypoxic stress, and RYR2 is involved in heart function. These three genes also exhibited significant signals of natural selection in high altitude human populations, which suggest similar evolutionary constraints on natural selection in wolves and humans of the Qinghai-Tibet Plateau.

  20. Aasta Suurim Film? / Chili Palmer

    Index Scriptorium Estoniae

    Palmer, Chili

    2002-01-01

    Peter Jacksoni esimene film J.R.R. Tolkieni triloogia "Sõrmuste isand" alusel - "Sõrmuse vennaskond", ("The Lord of the Rings : The Fellowship of the Ring") : Uus-Meremaa, Ameerika Ühendriigid 2001