منابع مشابه
Improved Pivot Grasping Using Friction Plane Contacts
A four degree-of-freedom (DOF) robotic mechanism can be used to manipulate objects in six DOF by using a gripper altered for two-point pivot grasping where the force of gravity is used for six DOF reorientation. We show that one pivot grasp is sufficient to rotate an ashlar-shaped object from known initial stable configuration into arbitrary final stable configuration. If the initial configurat...
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Symmetrical and non-symmetrical diimines derived from dimedone were synthesized by the reaction of their corresponding enaminothiones with primary amines. The synthesized compounds were characterized using micro analytical data and NMR spectroscopy. Theoretical calculations by B3LYP/6-31G(d,p) level of theory show that the enolic form is the most stable within the possible tautomeric forms of t...
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An endeavour was made to examine the female contacts of all new male N.G.U. patients attending three special treatment centres. 63-6 per cent. of the women were referred by their husbands and the remainder by other sex contacts (Table I). The 250 cases dealt with in this series were unselected except that the contacts of men who developed N.G.U. while under surveillance for gonorrhoea were excl...
متن کاملThe Enumeration of Simultaneous Higher-order Contacts between Plane Curves
Using the Semple bundle construction of [5] and [6], we derive an intersectiontheoretic formula for the number of simultaneous contacts of specified orders between members of a generic family of degree d plane curves and finitely many fixed curves. The contacts counted by the formula occur at nonsingular points of both the members of the family and the fixed curves.
متن کاملOn Cyclically Symmetrical Spacetimes
In a recent paper Carot et al. considered the definition of cylindrical symmetry as a specialisation of the case of axial symmetry. One of their propositions states that if there is a second Killing vector, which together with the one generating the axial symmetry, forms the basis of a two-dimensional Lie algebra, then the two Killing vectors must commute, thus generating an Abelian group. In t...
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ژورنال
عنوان ژورنال: International Journal of Mechanical Sciences
سال: 1999
ISSN: 0020-7403
DOI: 10.1016/s0020-7403(98)00105-2