Results 121 to 130 of about 1,450 (176)
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Nutrition and Health, 1993
Reasons why mammalian bipedalism is so rare. Problems encountered by the larger arboreal mammals when they descend to ground level. Reasons for believing that hominid ancestors were never knuckle-walkers. Primate models which combine arboreal life with incipient bipedalism. Disadvantages of mammalian bipedalism.
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Reasons why mammalian bipedalism is so rare. Problems encountered by the larger arboreal mammals when they descend to ground level. Reasons for believing that hominid ancestors were never knuckle-walkers. Primate models which combine arboreal life with incipient bipedalism. Disadvantages of mammalian bipedalism.
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Science, 1987
In the letter "Tanker 'dumping' regulations" by T. S. Wyman (5 June, p. 1160), the years of amendations to the International Convention for the Prevention of Pollution from Ships, 1973, mentioned in the second paragraph, were incorrect. The amendations were made in 1978, 1984, and 1985 (not 1987).
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In the letter "Tanker 'dumping' regulations" by T. S. Wyman (5 June, p. 1160), the years of amendations to the International Convention for the Prevention of Pollution from Ships, 1973, mentioned in the second paragraph, were incorrect. The amendations were made in 1978, 1984, and 1985 (not 1987).
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On the Stability of Bipedal Walking
2010Stability of bipedal locomotion is analyzed using a model of a planar biped written in the framework of systems with unilateral constraints. Based on this model, two different stable walking gaits are derived: one which fulfills the widely used criterion of the Zero Moment Point (ZMP) and another one violating this criterion.
Zutven, van, P.W.M. +2 more
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Nanoscale, 2018
A DNA bipedal walker shows stride-controlled gait switch and direction reversal.
Y. H. Chiang +6 more
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A DNA bipedal walker shows stride-controlled gait switch and direction reversal.
Y. H. Chiang +6 more
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Cursoriality in bipedal archosaurs
Nature, 2000Modern birds have markedly foreshortened tails and their body mass is centred anteriorly, near the wings. To provide stability during powered flight, the avian centre of mass is far from the pelvis, which poses potential balance problems for cursorial birds.
T D, Jones +4 more
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The synthesis of bipedal locomotion
Journal of Biomechanics, 1972Abstract This paper presents a mathematical model for the synthesis and control of bipedal walkers. The model deals with the three-dimensional motion of a symmetrical rigid body with massless extensible legs. Body trajectories and controls are synthesized for optimum stability and energy expenditure.
M A, Townsend, A, Seireg
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The pelvis in the bipedalism of primates
American Journal of Physical Anthropology, 1968AbstractThe pelvis in the “Normalstellung” tends in man to tilt backwards. In primates, the pelvis shows a marked tendency to tilt into quadruped posture. In both the bodyweight intensifies those tendencies. Consequently, assuming erect posture and maintaining bipedal balance encounter, in primates, constant resistance from pelvis and bodyweight.In ...
C A, Snell, H W, Donhuysen
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2007
BIP is an anthropomorphic walking robot designed for the study of both human and artificial bipedal locomotion. This paper presents an experimental approach to the problem of designing and executing a pattern of gaits on a dedicated 2-legged machine.
Christine Azevedo +3 more
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BIP is an anthropomorphic walking robot designed for the study of both human and artificial bipedal locomotion. This paper presents an experimental approach to the problem of designing and executing a pattern of gaits on a dedicated 2-legged machine.
Christine Azevedo +3 more
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Proceedings of the Royal Society of London. B. Biological Sciences, 1990
Abstract Human-like running is a natural dynamic mode of a simple mechanical biped. Such a machine consists of two telescoping legs with linear springs, connected by a hip joint with a torsional spring. It will run passively; no pattern of forcing is required to generate the gait.
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Abstract Human-like running is a natural dynamic mode of a simple mechanical biped. Such a machine consists of two telescoping legs with linear springs, connected by a hip joint with a torsional spring. It will run passively; no pattern of forcing is required to generate the gait.
openaire +2 more sources