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    Wyświetlanie 1-2 z 2
    Tytuł:
    Texture and composition of the Rosa Marina beach sands (Adriatic coast, southern Italy): a sedimentological/ecological approach
    Autorzy:
    Moretti, M.
    Tropeano, M.
    van Loon, A. J.
    Acquafredda, P.
    Baldacconi, R.
    Festa, V.
    Lisco, S.
    Mastronuzzi, G.
    Moretti, V.
    Scotti, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/94295.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    source-area reconstruction
    grain-size analysis
    mineralogical composition
    image analysis
    coastal erosion
    texture
    composition
    beach sands
    Rosa Marina
    Adriatic coast
    southern Italy
    rekonstrukcja obszaru źródłowego
    analiza wielkości ziarna
    skład mineralogiczny
    analiza obrazu
    erozja wybrzeża
    tekstura
    skład
    piasek plażowy
    wybrzeże Adriatyku
    południowe Włochy
    Opis:
    Beach sands from the Rosa Marina locality (Adriatic coast, southern Italy) were analysed mainly microscopically in order to trace the source areas of their lithoclastic and bioclastic components. The main cropping out sedimentary units were also studied with the objective to identify the potential source areas of lithoclasts. This allowed to establish how the various rock units contribute to the formation of beach sands. The analysis of the bioclastic components allows to estimate the actual role of organisms regarding the supply of this material to the beach. Identification of taxa that are present in the beach sands as shell fragments or other remains was carried out at the genus or family level. Ecological investigation of the same beach and the recognition of sub-environments (mainly distinguished on the basis of the nature of the substrate and of the water depth) was the key topic that allowed to establish the actual source areas of bioclasts in the Rosa Marina beach sands. The sedimentological analysis (including a physical study of the beach and the calculation of some statistical parameters concerning the grain-size curves) shows that the Rosa Marina beach is nowadays subject to erosion.
    Źródło:
    Geologos; 2016, 22, 2; 87-103
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of functional methods for human movement modelling
    Autorzy:
    Gastaldi, L.
    Lisco, G.
    Pastarelli, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/307058.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    analiza funkcjonalna
    analiza ruchu
    modelowanie
    kinematyka
    functional analysis
    motion analysis
    human modelling
    joint kinematics
    Opis:
    Purpose: accurate assessment of human joint parameters is a critical issue for the quantitative movement analysis, due to a direct influence on motion patterns. In this study three different known functional methods are experimentally compared to identify knee joint kinematics for further gait and motion analysis purposes. Methods: taking into account the human knee physiology complexity, within its roto-translation, the study is conducted on a lower limb mechanical analogue with a polycentric hinge-based kinematic model. The device mimics a joint with a mobile axis of rotation whose position is definable. Sets of reflective markers are placed on the dummy and flexion-extension movements are imposed to the shank segment. Marker positions are acquired using an optoelectronic motion capture system (Vicon 512). Results: acquired markers’ positions are used as input data to the three functional methods considered. These ones approximate the polycentric knee joint with a fixed single axis model. Different ranges of motion and number of markers are considered for each functional method. Results are presented through the evaluation of accuracy and precision concerning both misalignment and distance errors between the estimated axis of rotation and the instantaneous polycentric one, used as reference. Conclusion: the study shows the feasibility of the identification of joint parameters with functional approaches applied on a polycentric mechanism, differently from those usually conceived by the reviewed algorithms. Moreover, it quantifies and compares the approximation errors using different algorithms, by varying number and position of markers, as well ranges of motion.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 4; 31-38
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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