193,538 research outputs found

    Phylogenetics, systematics and biogeography of deep-sea Pennatulacea (Anthozoa: Octocorallia): evidence from molecules and morphology

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    Despite its extreme environmental conditions, the deep sea harbours a unique andspecies-rich fauna of mostly unknown age and phylogeny. Pennatulids (Anthozoa:Octocorallia) are a group whose taxonomy and phylogenetic relationships remain poorlyknown and little studied, in spite of their abundance and ecological importance in softbottomcommunities. Phylogenetic analysis of a combination of partial ND2 and msh1sequences produced well-supported phylogenetic relationships for representative deepsea(and shallow-water) pennatulids at familial, generic and specific taxonomic levels.Generally, molecular data were congruent with current classification and previousphylogenetic reconstructions of the O. Pennatulacea based on morphology.Discrepancies were evident concerning the finer details for some families and genera: thiscan be attributable to the high frequency of homoplasy in pennatulids where reversals inevolution have led to taxa that possess apomorphic character states that are analogouswith plesiomorphic traits. Genetic analysis gave strong support that highly-derived taxaoccur in both shallow and deep water and that many may have differentiated anddispersed from the deep sea to the shallows. The Renillidae, which is considered one ofthe most primitive shallow-water families, evolved recently from deep-water ancestors.Conversely, the bathyal Anthoptilidae was the most primitive of families, and althoughmore evidence is required, pennatulids as a group may have originated in deep water.The systematics of the exclusively deep-sea genus Umbellula, which contains fortytwospecies, remains unclear despite the repeated attempts of revision. Incorporatingnew morphological and distributional data from the examination of recently collectedmaterial, together with type specimens, genetic analysis, and a critical study of theliterature, fifteen Umbellula species are here considered valid, including three new toscience. Eight species lack sclerites in the autozooids, U. magniflora, U. encrinus, U.antarctica, U. carpenteri and Umbellula sp.1 n. sp. (quadrangular axes), and U. huxleyi andU. pellucida (round axes); and seven possess autozooid sclerites, U. thomsoni and U.hemigymna (quadrangular axes), and U. monocephalus, U. aciculifera, U. durissima,Umbellula sp.2 n. sp. and Umbellula sp.3 n. sp. (round axes).Biogeographic data and genetic evidence supported the hypothesis that species ofUmbellula differentiated in the Indo-Pacific. Many radiated southwards to the Antarcticand later north into the Atlantic, E Pacific, Indian and Arctic oceans, occupying bathyaland abyssal depths. Other, older species that evolved via a separate evolutionarypathway, may have originated in the Indo-Pacific, and dispersed to the Subantarctic (U.sp.2 n. sp.) or Indian and Atlantic oceans (U. monocephalus). Further, morphologicalexamination of Umbellula showed it adapted to the oligotrophic conditions of the deepsea by reducing the number but increasing the size of the autozooids, and in doing so,enlarged the food-catchment area; abyssal species have done so even more extremely

    The functional imaging of recall

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    An associative theory of implicit and explicit memory, G.H. Bower; encoding and retrieval processes - similarities and differences, F.I.M. Craik, M. Naveh-Benjamin, N.D. Anderson; memory imagery - a visual trace is not a mental image, C. Cornoldi, R. de Beni, F. Giusberti, M. Massironi; imaginary memories, E.F. Loftus; the rise and fall of semantic memory, J.M. Mandler; stories, selves and schemata - a review of ecological findings, U. Neisser; associative processes in false recall and false recognition, H.L. Roediger III, K.B. McDermott, K.J. Robinson; the functional imaging of recall, T. Shallice, P. Fletcher, R. Dolan; three dimensions of spatial cognition, B. Tversky. Part contents.

    To : Chuck Harple ; Fr : Mike ectionDotboycial I Dolan ; Dt : 8/30 ; Re : WTO items ; cc : Lori [p.2 of 2]

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    Names and organizations mentioned in the correspondence (as they appear): Chuck Harple, Mike Dolan, Lori, John Rabine, Mark Andresen, Vinnie O'Brian, Joe Uehlein, Local 227, Ed Tyler, Larry Weiss, Brother Kiegler, Dave Foster, Teamsters Local 174, Bob Hasegawa, CTC, IBT, USWA, PACE, UAW, UNITE, ILWU, Ron Judd, Klinefelter, David Smith, Bill Daley, Margrete Strand, Tod, Jim Wilkinson.Before WTOPersonal CommunicationTradeLocal 227, Teamsters Local 174, Citizens Trade Campaign, IBT, United Steelworkers of America, PACE, United Auto Workers, UNITE, International Longshoremen's and Warehousemen's Unio

    Anna Dolan

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    Anna married Thomas John (Tommy) Dolan on 23 July 1878 in Brewarrina, New South Wales and they had a daughter in 1881. Their daughter died within the year. In 1882 their son was born and the family travelled to Borroloola, then on to Anthony's Lagoon by 1886. On 29 September 1888 Anna was arrested at the Hart's Royal Hotel by a Mounted Constable for ?shooting with intent'. She had demanded a grant for divorce because she wanted to join another man who was prepared to pay Tommy handsomely if the divorce came through. After the judge had heard all the evidence, he found there was insufficient evidence to convict Anna and reprimanded Thomas. Thomas and Anna had their third child in 1889. In 1895 when Anna was 29 years and living in Palmerston, she was one of the 82 women who enrolled to vote after the franchise was granted to South Australian and Territory women in 1894. Her occupation was listed as 'married woman'. In 1895 she purchased a block of suburban land and applied for an agricultural lease at Nightcliff. In 1896 a lease was granted for an area of 400 acres. The cyclone in 1897 devastated Palmerston and wrecked the Dolan's cottage at the 2? mile (Parap). Anna was granted a temporary certificate by Palmerston District Council to carry on business at the railway refreshment rooms at Adelaide River, which she managed for two years from 1897. When Thomas gained work as a ganger which kept him away from home for long periods of time, Anna and their two sons moved back to Palmerston to live at Nightcliff. On 15 October 1902, Anna gave birth to a daughter and six months later died of peritonitis.Businesswoma

    To : Chuck Harple ; Fr : Mike ectionDotboy" Dolan ; Dt : 8/30 ; Re : WTO items ; cc : Lori [p.1 of 2]

    No full text
    Names and organizations mentioned in the correspondence (as they appear): Chuck Harple, Mike Dolan, Lori, John Rabine, Mark Andresen, Vinnie O'Brian, Joe Uehlein, Local 227, Ed Tyler, Larry Weiss, Brother Kiegler, Dave Foster, Teamsters Local 174, Bob Hasegawa, CTC [Citizens Trade Campaign], IBT, USWA, PACE, UAW, UNITE, ILWU, Ron Judd, Klinefelter, David Smith, Bill Daley, Margrete Strand, Tod, Jim Wilkinson.Before WTOPersonal CommunicationTradeLocal 227, Teamsters Local 174, Citizens Trade Campaign, IBT, United Steelworkers of America, PACE, United Auto Workers, UNITE, International Longshoremen's and Warehousemen's Unio

    Dolan (Jay P.) Catholic Revivalism. The American Experience (1830-1900)

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    Séguy Jean. Dolan (Jay P.) Catholic Revivalism. The American Experience (1830-1900). In: Archives de sciences sociales des religions, n°49/2, 1980. pp. 252-253

    Neural correlates of processing valence and arousal in affective words

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    Psychological frameworks conceptualize emotion along 2 dimensions, "valence" and "arousal." Arousal invokes a single axis of intensity increasing from neutral to maximally arousing. Valence can be described variously as a bipolar continuum, as independent positive and negative dimensions, or as hedonic value (distance from neutral). In this study, we used functional magnetic resonance imaging to characterize neural activity correlating with arousal and with distinct models of valence during presentation of affective word stimuli. Our results extend observations in the chemosensory domain suggesting a double dissociation in which subregions of orbitofrontal cortex process valence, whereas amygdala preferentially processes arousal. In addition, our data support the physiological validity of descriptions of valence along independent axes or as absolute distance from neutral but fail to support the validity of descriptions of valence along a bipolar continuum

    How the Irish Speak English: A Conversation with T. P. Dolan

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    Professor T. P. Dolan is a lexicographer and regular contributor to programs on Irish radio and television, who has made the term Hiberno-English widely known in Irish society. He has thus been hugely influential in making the Irish more aware of the features that make their English different from other Englishes. Hiberno-English is nowadays very much a sign of identity for many, a form of English that sets the Irish apart from other native speakers of English. Professor Dolan is also the director of www.hiberno-english.com, which is, as he describes it ‘a living museum’ or ‘living laboratory of HE vocabulary and syntax’, where people from all over the world can log questions about the English of Ireland

    Dissociating valence of outcome from behavioral control in human orbital and ventral prefrontal cortices

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    The precise role of orbitofrontal cortex (OFC) in affective processing is still debated. One view suggests OFC represents stimulus reward value and supports learning and relearning of stimulus-reward associations. An alternate view implicates OFC in behavioral control after rewarding or punishing feedback. To discriminate between these possibilities, we used event-related functional magnetic resonance imaging in subjects performing a reversal task in which, on each trial, selection of the correct stimulus led to a 70% probability of receiving a monetary reward and a 30% probability of obtaining a monetary punishment. The incorrect stimulus had the reverse contingency. In one condition (choice), subjects had to choose which stimulus to select and switch their response to the other stimulus once contingencies had changed. In another condition (imperative), subjects had simply to track the currently rewarded stimulus. In some regions of OFC and medial prefrontal cortex, activity was related to valence of outcome, whereas in adjacent areas activity was associated with behavioral choice, signaling maintenance of the current response strategy on a subsequent trial. Caudolateral OFC-anterior insula was activated by punishing feedback preceding a switch in stimulus in both the choice and imperative conditions, indicating a possible role for this region in signaling a change in reward contingencies. These results suggest functional heterogeneity within the OFC, with a role for this region in representing stimulus-reward values, signaling changes in reinforcement contingencies and in behavioral control
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