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The product of exponentials (POE) method is a robotics convention for mapping the links of a spatial kinematic chain. It is an alternative to Denavit–Hartenberg parameterization. While the latter method uses the minimal number of parameters to represent joint motions, the former method has a number of advantages: uniform treatment of ...
Also known as Arctic bases, polar stations or ice stations, these bases are widely distributed across the northern polar region of Earth. Historically few research stations have been permanent. Most of them were temporary, being abandoned after the completion of the project or owing to lack of funding to continue the research.
In mathematics and physics, the right-hand rule is a convention and a mnemonic, utilized to define the orientation of axes in three-dimensional space and to determine the direction of the cross product of two vectors, as well as to establish the direction of the force on a current-carrying conductor in a magnetic field.
While they may have both been designed for hacking and piercing through armor plates, the axe blade on a poleaxe seems to have been consistently smaller than that of a halberd. A smaller head concentrates the kinetic energy of the blow on a smaller area, enabling the impact to defeat armour, while broader halberd heads are better against ...
This characterization of zeros and poles implies that zeros and poles are isolated, that is, every zero or pole has a neighbourhood that does not contain any other zero and pole. Because of the order of zeros and poles being defined as a non-negative number n and the symmetry between them, it is often useful to consider a pole of order n as a ...
In planar dynamics a pole is a center of rotation, the polar is the force line of action and the conic is the mass–inertia matrix. [4] The pole–polar relationship is used to define the center of percussion of a planar rigid body. If the pole is the hinge point, then the polar is the percussion line of action as described in planar screw theory.
Pole arms developed from relatively few early tools (axe, scythe/wide-bladed knife, and the pruning hook) and the spear. [3] Thus naming, particularly of early forms, is difficult. Fauchard, as a name, is from early French and may have been used to describe various arms. The sovnya may have been a localized term for the same medieval weapon.
The Lochaber axe is a simple axe with a broad curved blade usually attached to its long haft at two points. On the back of the blade is a simple hook. On the back of the blade is a simple hook. This type of axe is first recorded in 1501 and was used until the 18th. century.