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    Wyświetlanie 1-8 z 8
    Tytuł:
    New evidence on brain-endocranial cavity relationships in ornithischian dinosaurs
    Autorzy:
    Evans, D C
    Powiązania:
    https://bibliotekanauki.pl/articles/23142.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    relationship
    brain
    endocranial cavity
    Cretaceous
    Dinosauria
    ornithischian dinosaur
    Hadrosauridae
    dinosaur
    Pachycephalosauridae
    paleontology
    Opis:
    Discussions of brain morphology and relative brain size in nonavian dinosaurs have been complicated by uncertainty in the extent to which the brain filled the endocranial cavity. Recently reported vascular imprints (valleculae) on the endocranial surfaces of the braincase suggest that nonavian maniraptoriform theropods had brains that tightly fit the endocranium. Similar impressions of the intracranial vascular system are reported here in two ornithischian clades, Hadrosauridae and Pachycephalosauridae. These structures are more widespread in dinosaurs than previously thought, and suggest that the brain closely fit the endocranium in some regions of the forebrain through hindbrain in several distantly related dinosaur groups.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Challenges and opportunities for the future of icampuses
    Autorzy:
    Thomas, A. M.
    Shah, H.
    Moore, P.
    Evans, C.
    Sharma, M.
    Pham, H. V.
    Osman, K.
    Wilcox, A. J.
    Rayson, P.
    Chapman, C.
    Chima, P.
    Athwal, C.
    While, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/952933.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    education
    icampus
    sensors
    context
    Web 2.0
    Opis:
    Meeting the educational needs of students currently requires moving toward collaborative electronic and mobile learning systems that parallel the vision of Web 2.0. However, factors such as data freedom, brokerage, interconnectivity and the Internet of Things add to a vision for Web 3.0 that will require consideration in the development of future campus-based, distance and vocational study. So, education can, in future, be expected to require deeper technological connections between students and learning environments, based on significant use of sensors, mobile devices, cloud computing and rich-media visualization. Therefore, we discuss challenges associated with such a futuristic campus context, including how learning materials and environments may be enriched by it. As an additional novel element the potential for much of that enrichment to be realized through development by students, within the curriculum, is also considered. We will conclude that much of the technology required to embrace the vision of Web 3.0 in education already exists, but that further research in key areas is required for the concept to achieve its full potential.
    Źródło:
    Computer Science; 2013, 14 (1); 5-25
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Positronium for antihydrogen production in the AEGIS experiment
    Autorzy:
    Consolati, G.
    Aghion, S.
    Amsler, C.
    Bonomi, G.
    Brusa, R.
    Caccia, M.
    Caravita, R.
    Castelli, F.
    Cerchiari, G.
    Comparat, D.
    Demetrio, A.
    Di Noto, L.
    Doser, M.
    Evans, C.
    Fanì, M.
    Ferragut, R.
    Fesel, J.
    Fontana, A.
    Gerber, S.
    Giammarchi, M.
    Gligorova, A.
    Guatieri, F.
    Haider, S.
    Hinterberger, A.
    Holmestad, H.
    Kellerbauer, A.
    Khalidova, O.
    Krasnicky, D.
    Lagomarsino, V.
    Lansonneur, P.
    Lebrun, P.
    Malbrunot, C.
    Mariazzi, S.
    Marton, J.
    Matveev, V.
    Mazzotta, Z.
    Müller, S.
    Nebbia, G.
    Nedelec, P.
    Oberthaler, M.
    Pacifico, N.
    Pagano, D.
    Penasa, L.
    Petracek, V.
    Prelz, F.
    Prevedelli, M.
    Ravelli, L.
    Rienaecker, B.
    Robert, J.
    Røhne, O.
    Rotondi, A.
    Sandaker, H.
    Santoro, R.
    Smestad, L.
    Sorrentino, F.
    Testera, G.
    Tietje, I.
    Widmann, E.
    Yzombard, P.
    Zimmer, C.
    Zmeskal, J.
    Zurlo, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1057954.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    04.80.Cc
    07.77.-n
    36.10.Dr
    78.70.Bj
    Opis:
    The primary goal of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) collaboration is to measure for the first time precisely the gravitational acceleration of antihydrogen, H̅, a fundamental issue of contemporary physics, using a beam of antiatoms. Indeed, although indirect arguments have been raised against a different acceleration of antimatter with respect to matter, nevertheless some attempts to formulate quantum theories of gravity, or to unify gravity with the other forces, consider the possibility of a non-identical gravitational interaction between matter and antimatter. We plan to generate H̅ through a charge-exchange reaction between excited Ps and antiprotons coming from the Antiproton Decelerator facility at CERN. It offers the advantage to produce sufficiently cold antihydrogen to make feasible a measurement of gravitational acceleration with reasonable uncertainty (of the order of a few percent). Since the cross-section of the above reaction increases with n⁴, n being the principal quantum number of Ps, it is essential to generate Ps in a highly excited (Rydberg) state. This will occur by means of two laser excitations of Ps emitted from a nanoporous silica target: a first UV laser (at 205 nm) will bring Ps from the ground to the n=3 state; a second laser pulse (tunable in the range 1650-1700 nm) will further excite Ps to the Rydberg state.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1443-1449
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New lizards and rhynchocephalians from the Lower Cretaceous of Southern Italy
    Autorzy:
    Evans, S E
    Raia, P.
    Barbera, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/20920.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    predation
    Italy
    Cretaceous
    Rhynchocephalia
    Squamata
    new lizard
    Lepidosauria
    lizard
    paleobiogeography
    paleontology
    Opis:
    The Lower Cretaceous (Albian age) locality of Pietraroia, near Benevento in southern Italy, has yielded a diverse assemblage of fossil vertebrates, including at least one genus of rhynchocephalian (Derasmosaurus) and two named lizards (Costasaurus and Chometokadmon), as well as the exquisitely preserved small dinosaur, Scipionyx. Here we describe material pertaining to a new species of the fossil lizard genus Eichstaettisaurus (E. gouldi sp. nov.). Eichstaettisaurus was first recorded from the Upper Jurassic (Tithonian age) Solnhofen Limestones of Germany, and more recently from the basal Cretaceous (Berriasian) of Montsec, Spain. The new Italian specimen provides a significant extension to the temporal range of Eichstaettisaurus while supporting the hypothesis that the Pietraroia assemblage may represent a relictual island fauna. The postcranial morphology of the new eichstaettisaur suggests it was predominantly ground−living. Further skull material of E. gouldi sp. nov. was identified within the abdominal cavity of a second new lepidosaurian skeleton from the same locality. This second partial skeleton is almost certainly rhynchocephalian, based primarily on foot and pelvic structure, but it is not Derasmosaurus and cannot be accommodated within any known genus due to the unusual morphology of the tail vertebrae.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revealing body proportions of the enigmatic choristodere reptile Khurendukhosaurus from Mongolia
    Autorzy:
    Matsumoto, R.
    Tsogtbaatar, K.
    Ishigaki, S.
    Tsogtbaatar, C.
    Enkhtaivan, Z.
    Evans, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/22991.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Khurendukhosaurus is an enigmatic genus of choristodere, recorded from the Lower Cretaceous of East Asia, Mongolia, and Siberian Russia. Until now, it was known only from isolated skull and postcranial elements, limiting comparison with other genera. Three major morphotypes have been recognised within Choristodera: longirostrine neochoristoderes with short-necks, and brevirostrine non-neochoristoderes with either short or long necks. The morphotype of Khurendukhosaurus was uncertain, although it had been inferred to be long-necked, based on cervical and caudal vertebral morphology shared with the Chinese Hyphalosaurus and on the results of phylogenetic analysis that placed it within a clade of Sino-Japanese long-necked taxa. Newly discovered material from the Mongolian type locality, Khuren-Dukh, preserves most major postcranial elements of a single individual. This specimen confirms that Khurendukhosaurus belongs to the long-necked morphotype, in having at least 13 cervical vertebrae. Moreover, a new phylogenetic analysis supports the placement of Khurendukhosaurus as a sister group of the Hyphalosaurus + Shokawa clade. Based on the new material, Khurendukhosaurus is estimated to have been roughly 1 m in total length, placing it at the upper end of the size range for long-necked choristoderes.
    Źródło:
    Acta Palaeontologica Polonica; 2019, 64, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cortical pattern detection for the developing brain: a 3D vertex labeling and skeletonization approach
    Autorzy:
    Clouchoux, C.
    Kudelski, D.
    Bouyssi-Kobar, M.
    Viseur, S.
    du Plessis, A.
    Evans, A.
    Mari, J.-L.
    Limperopoulos, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/333059.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    rozwój mózgu
    ocena krzywizny
    wychwytywanie cech
    sulcal pattern
    brain development
    in-vivo MRI
    cortical surface
    curvature estimation
    morphological operators
    feature extraction
    Opis:
    Normal brain development is associated with expansion and folding of the cerebral cortex in a normal sequence of gyral–sulcal formation. We propose a global approach for measuring the cortical folding pattern of the developing brain. Our method measures geometric features directly on the cortical surface mesh, based on vertex labeling and skeletonization. The resulting extraction provides an accurate representation of global cortical organization. We applied this method to 17 young infants in order to characterize the evolution of cortical organization in the developing brain.
    Źródło:
    Journal of Medical Informatics & Technologies; 2010, 16; 161-166
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of the Ordovician stratigraphy and fauna of the Anarak Region in Central Iran
    Autorzy:
    Popov, L. E.
    Hairapetian, V.
    Evans, D. H.
    Ghobadi Pour, M.
    Holmer, L. E.
    Baars, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/138968.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    darriwilian
    katian
    brachiopods
    cephalopods
    trilobites
    biogeography
    darriwil
    kat
    ramienionogi
    głowonogi
    trylobity
    biogeografia
    Opis:
    The Ordovician sedimentary succession of the Pol-e Khavand area, situated on the northern margin of the Yazd block, has important differences from those in other parts of Central Iran. It has been established that the presumably terminal Cambrian to Lower Ordovician volcano-sedimentary Polekhavand Formation, exposed in the Pol-e Khavand area, has non-conformable contact with greenschists of the Doshakh Metamorphic Complex. The succeeding, mainly siliciclastic Chahgonbad Formation contains low to moderately diverse faunal assemblages, including brachiopods, cephalopods, trilobites and tentaculitids. The Darriwilian age of the lower part of the formation is well established by the co-occurrence of brachiopod genera Camerella, Phragmorthis, Tritoechia and Yangtzeella. The associated rich cephalopod fauna is different from the Darriwilian cephalopod associations of the Alborz terrane and may show some affinity with warm water faunas of North China and South Korea. It is likely that the Mid Ordovician fauna recovered from the lower part of the Chahgonbad Formation settled in the area sometime during a warming episode in the late Darriwilian. By contrast the low diversity mid Katian brachiopod association includes only three taxa, which occur together with the trilobite Vietnamia cf. teichmulleri and abundant, but poorly preserved tentaculitids questionably assigned to the genus Costatulites. This faunal association bears clear signatures linking it to the contemporaneous cold water faunas of the Arabian, Mediterranean and North African segments of Gondwana. Four brachiopod species recovered from the Chahgonbad Formation, including Hibernodonta lakhensis, Hindella prima, Lomatorthis? multilamellosa and Yangtzeella chupananica are new to science.
    Źródło:
    Acta Geologica Polonica; 2015, 65, 4; 403-435
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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