منابع مشابه
Elastic Response of bones at varying strain rates
Mechanical properties of tibial bone at compressive strain rates of 50-200 s are obtained through Split Hopkinson pressure bar. Cylindrical specimens of 12-15 mm diameter and 2-5 mm thickness were used. The Young’s moduli are calculated from linear portion of stress-strain curves. For both cortical and cancellous part of the bones, the Young’s modulus was found to increase with the increasing s...
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Increasing numbers of children are becoming involved in competitive sport. International trends in pre-adolescent sports participation are mirrored in New Zealand, where promising young athletes are being exposed to high-intensity training from an earlier age. As a consequence, overuse injuries which were traditionally described in more mature athletes are now becoming recognized in pre-adolesc...
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Long bones are far from being simple cylinders, so how is the relative positioning of their various features maintained during growth? A new study shows that growth is isometric and that drift from the correct position is minimized. Read the Research Article.
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Photogenic predator: Coeloid cephalopods, a group of shell-less molluscs, evolved at around the time when vertebrates started to conquer land. As visual predators, they competed against early fi shes and developed remarkable complexity of body and behaviour. The photo shows the octopus Wunderpus photogenicus, found in shallow waters from Indonesia to the Philippines. (Photo: Roy L. Caldwell.) F...
متن کاملThe Krapina Occipital Bones
The Krapina fossils are the largest collection of Neandertals known, representing a unique opportunity to examine Neandertal variation at a single place and time. Because of the nature of the assemblage, knowledge about the collection as a whole must be obtained from the analyses of the individual skeletal elements. In this work I present a summary of a subset of the Krapina fragments, the occi...
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ژورنال
عنوان ژورنال: The Geologist
سال: 1863
ISSN: 1359-4656
DOI: 10.1017/s1359465600001556