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    Tytuł:
    A new diplodocoid sauropod dinosaur from the Upper Jurassic Morrison Formation of Montana, USA
    Autorzy:
    Harris, J D
    Dodson, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/22659.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    phylogenesis
    Dicraeosauridae
    Diplodocoidea
    Upper Jurassic
    dinosaur
    Montana
    Jurassic
    paleobiogeography
    Diplodocidae
    USA
    sauropod dinosaur
    Dinosauria
    Morrison Formation
    paleontology
    Opis:
    A partial skeleton of a new sauropod dinosaur from the Upper Jurassic Morrison Formation (?Tithonian) of Montana is described. Suuwassea emilieae gen. et sp. nov. is diagnosed by numerous cranial, axial, and appendicular autapomorphies. The holotype consists of a premaxilla, partial maxilla, quadrate, braincase with partial skull roof, several partial and complete cranial and middle cervical, cranial dorsal, and caudal vertebrae, ribs, complete scapulocoracoid, humerus, partial tibia, complete fibula, calcaneus, and partial pes. It displays numerous synapomorphies of the Diplodocoidea, including characters of both the Diplodocidae (Apatosaurus + (Diplodocus + Barosaurus)) and Dicraeosauridae (Dicraeosaurus + Amargasaurus). Preliminary phylogenetic analysis indicates that Suuwassea is a diplodocoid more derived than rebbachisaurids but in a trichotomy with both the Diplodocidae and Dicraeosauridae. Suuwassea represents the first well−supported, North American, non−diplodocid representative of the Diplodocoidea and provides new insight into the origins of both the Diplodocidae and Dicraeosauridae.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A second Cretaceous ornithuromorph bird from the Changma Basin, Gansu Province, northwestern China
    Autorzy:
    You, H.-L.
    Atterholt, J.
    O'Connor, J.K.
    Harris, J.D.
    Lamanna, M.C.
    Li, D.-Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/22506.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Cretaceous
    ornithuromorph bird
    bird
    Aves
    Ornithuromorpha
    Aptian
    Early Cretaceous
    paleontology
    Changma basin
    Gansu province
    China
    Opis:
    Finely−bedded lacustrine deposits of the Aptian (Lower Cretaceous) Xiagou Formation exposed in the Changma Basin of Gansu Province, northwestern China, have yielded numerous fossil vertebrate remains, including approximately 100 avian specimens. Though the majority of these birds appear referable to the ornithuromorph Gansus yumenensis, a number of enantiornithine fossils have also been recovered. Here we report on a specimen consisting of a complete, three−dimensionally preserved sternum, furcula, and sternal ribs that represents a second ornithuromorph taxon from the Xiagou Formation at Changma. The fossil exhibits morphologies that distinguish it from all previously−known Xiagou birds and demonstrate that it represents a derived non−ornithurine member of Ornithuromorpha. Though it is morphologically distinct from the equivalent elements of all other described ornithuromorphs, the material is too incomplete to justify the erection of a new taxon. Nonetheless, it increases the taxonomic diversity of the Xiagou avifauna, thereby expanding our knowledge of Early Cretaceous avian diversity and evolution.
    Źródło:
    Acta Palaeontologica Polonica; 2010, 55, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A New Deinonychosaurian Track from the Lower Cretaceous Hekou Group, Gansu Province, China
    Autorzy:
    Xing, L.
    Li, D.
    Harris, J.D.
    Bell, P.R.
    Azuma, Y.
    Fujita, M.
    Lee, Y.-N.
    Currie, P.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/20547.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Herein we describe deinonychosaurian (Dinosauria: Theropoda) tracks in the Lower Cretaceous Hekou Group at sites I and II of Liujiaxia Dinosaur National Geopark, Gansu Province, China. The site preserves 71 didactyl tracks, the largest concentration of deinonychosaurian tracks in Asia. The tracks pertain to a new dromaeopodid ichnospecies: Dromaeosauripus yongjingensis ichnosp. nov., which is diagnosed by: a digital pad formula of x−1−3−4−x and a mean divarication angle between digits III and IV of 19°, and having the proximal portion of digit II contacting the anterior margin of a large, rounded metatarsophalangeal pad. Six Dromaeosauripustrackways from site II comprise at least two, and possibly three, turning trackways in which the track maker(s) turned without slowing down. None of the Dromaeosauripus trackways are parallel or closely spaced, suggesting that they were made by solitary track makers. Estimates of dromaeopodid track−maker sizes are between 61–300 cm, well within the size range established by body fossils of both dromaeosaurids and troodontids.
    Źródło:
    Acta Palaeontologica Polonica; 2013, 58, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A partial skeleton of an enantiornithine bird from the Early Cretaceous of Northwestern China
    Autorzy:
    Lamanna, M.C.
    You, H.-L.
    Harris, J.D.
    Chiappe, L.M.
    Ji, S.-A.
    Lu, J.-C.
    Ji, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/20670.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    China
    Cretaceous
    Early Cretaceous
    paleontology
    skeleton
    partial skeleton
    bird
    Aves
    enantiornithine bird
    Enantiornithes
    Xiagou Formation
    remains
    Opis:
    Although recent discoveries from Lower Cretaceous sediments in northeastern China have greatly improved our understanding of the initial stages of avian diversification in eastern Asia, the early evolution of Aves elsewhere on the continent remains poorly understood. In 2004, a collaborative field effort directed by personnel from the Chinese Academy of Geological Sciences and Carnegie Museum of Natural History recovered multiple partial to nearly complete avian skeletons from outcrops of the Lower Cretaceous Xiagou Formation exposed in the Changma Basin of northwestern Gansu Province, China. Here we describe a thrush−sized partial skeleton comprised of a fragmentary pelvic girdle and largely complete hind limbs. A phylogenetic analysis of 20 avian ingroup taxa and 169 anatomical characters places the specimen in Enantiornithes, and within that clade, in Euenantiornithes. When coupled with additional recent discoveries from the Changma Basin, the new skeleton improves our understanding of early avian evolution and diversification in central Asia.
    Źródło:
    Acta Palaeontologica Polonica; 2006, 51, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Risk Perception and Risk-Taking Behavior of Construction Site Dumper Drivers
    Autorzy:
    Bohm, J.
    Harris, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/89785.pdf
    Data publikacji:
    2010
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    risk perception
    hazard awareness
    construction site dumper
    construction site safety
    accidents
    Opis:
    In the UK construction site dumpers cause more serious accidents than any other type of construction plant. Previous research has indicated that driver behavior plays a pivotal role in the vast majority of these accidents. This study used a paired comparison technique to explore dumper drivers’ and subject matter experts’ (SMEs’) risk perception and its relationship to risk-taking behavior. It was found that driver risk perception significantly differed from measures of “objective risk”, derived from accident data and also from SMEs’ risk perception. Furthermore, drivers still engaged in undertaking perceived high risk behaviors. The results suggest that driver risk perception was linked to the “perceived dread” of an accident, rather than its likelihood and that risk-taking behavior was often driven by situational factors, such as site safety rules or the behavior of other personnel on the site, together with an overarching culture that prioritizes production over safety.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2010, 16, 1; 55-67
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hazard Awareness of Construction Site Dumper Drivers
    Autorzy:
    Bohm, J.
    Harris, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/90016.pdf
    Data publikacji:
    2012
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    mental models
    hazard awareness
    risk perception
    construction site dumper accidents
    Opis:
    In UK’s construction industry, site dumpers cause more serious accidents than in any other type of construction plant. Previous research has indicated that driver behaviour plays a pivotal role in the vast majority of these accidents. Using a mental models-based approach, 20 dumper drivers were interviewed with regard to the process by which several typical types of accident occurred. It was found that drivers were generally well-informed about the hazards of driving dumpers on a construction site. However, the findings also exposed some critical knowledge gaps, which could increase a driver’s chances of an accident. Educational material relating to these knowledge deficiencies could easily be prepared and incorporated into revised construction information leaflets or driver training courses.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2012, 18, 3; 363-373
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ripples in a Pond: An Open System Model of the Evolution of Safety Culture
    Autorzy:
    Morley, F. J. J.
    Harris, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/90121.pdf
    Data publikacji:
    2006
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    safety culture
    open systems
    safety management
    in-depth interviews
    workplace surveys
    bezpieczne projektowanie
    system zarządzania bezpieczeństwem i higieną pracy
    stanowisko pracy
    kultura bezpieczeństwa
    Opis:
    The development of an effective safety culture is essential to promote safe operations. Previous studies have either identified the characteristics of effective safety culture analytically, inferring them from signs and symbols derived from working practices, or have restricted the study of the development of safety culture to workers within an organisation. This paper describes a large-scale survey-based study in which the factors influencing the evolution of safety culture are identified empirically and, drawing upon open systems theory, are also extended beyond the bounds of the organisation. Three major determinants of safety culture are identified: safety concerns, influences and actions. Sub-components within each of these categories are also identified and the relationship between them is hypothesised.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2006, 12, 1; 3-15
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-sided estimates for the approximation numbers of Hardy-type operators in $L^{∞}$ and L¹
    Autorzy:
    D. Evans, W.
    Harris, D.
    Lang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1218334.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    In [2] and [3] upper and lower estimates and asymptotic results were obtained for the approximation numbers of the operator $T: L^p(ℝ^+) → L^p(ℝ^+)$ defined by $(Tf)(x) ≔ v(x) ʃ_{0}^{∞} u(t)f(t)dt$ when 1 < p < ∞. Analogous results are given in this paper for the cases p = 1,∞ not included in [2] and [3].
    Źródło:
    Studia Mathematica; 1998, 130, 2; 171-192
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic Properties of InAs/GaAs Self-Assembled Quantum Dot Structures and Devices Studied by Photocurrent Spectroscopy
    Autorzy:
    Mowbray, D. J.
    Fry, P. W.
    Skolnick, M. S.
    Itskevich, I. E.
    Harris, L.
    Ashmore, A. D.
    Finley, J. J.
    Wilson, L. R.
    Schumacher, K. L.
    Barker, J. A.
    O'Reilly, E. P.
    Al-Khafaji, M.
    Cullis, A. G.
    Hopkinson, M.
    Clark, J. C.
    Hill, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2014190.pdf
    Data publikacji:
    2000-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.66.Fd
    73.61.Ey
    73.50.Pz
    42.55.Px
    Opis:
    The power of photocurrent spectroscopy to study the electronic properties of InAs/GaAs self-assembled quantum dots is described. From comparison of results from different samples it is shown that photocurrent provides a direct means to measure absorption spectra of quantum dots. Studies in high electric field enable the electron-hole vertical alignment to be determined. Most surprisingly this is found to be opposite to that predicted by all recent predictions. Comparison with theory shows that this can only be explained if the dots contain significant amounts of gallium, and have a severely truncated shape. The nature of the ground and excited state transitions, carrier escape mechanisms from dots, in-plane wave function anisotropies and the modal gain of a quantum dot laser are determined.
    Źródło:
    Acta Physica Polonica A; 2000, 98, 3; 279-293
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bivalve Characterization Using Synchrotron Micro X-Ray Fluorescence
    Autorzy:
    Jones, K.
    Bronson, S.
    Brink, P.
    Gordon, C.
    Mosher-Smith, K.
    Brown, M.
    Chaudhry, S.
    Rizzo, A.
    Sigismondi, R.
    Whitehurst, M.
    Lukaszewski, A.
    Kranz, D.
    Bland, K.
    Gordan, D.
    Lobel, J.
    Sullivan, J.
    Metzger, M.
    O'Shea, C.
    Harris, C.
    Arezzo, R.
    Kambhampati, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808352.pdf
    Data publikacji:
    2009-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    01.40.-d
    07.85.Qe
    82.80.Ej
    87.59.-e
    Opis:
    Bivalves, oysters, mussels, and clams are important constituents of riverine and estuarine ecosystems. Their shells and soft tissues provide information on the environments in which they live. Since they are filter feeders, they also are factors in improving water quality through removal of particulate matter from the water column. Finally, they are a valuable food source that has substantial economic value. Hence, characterization of shells and soft tissues is useful for improved understanding of these factors. Here, we used X-ray microprobes and computed microtomography facilities at the Brookhaven National Synchrotron Light Source to investigate elemental distributions in bivalves taken from locations around New York, Washington, DC, and New Orleans, LA. The results form the initial basis for compilation of a database of relevant parameters that can serve for tracking environmental changes and for assessing toxicity of particular metals. The work was enabled by active collaboration with students from the several regions, community groups, and research scientists. The collaboration was facilitated through use of web conferencing between Brookhaven National Laboratory and the varied locations.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 2; 477-481
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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