19,212 research outputs found
Shaker slip-plate adapter
Magnesium adapter ties in all of the attachment bosses on a horizontal slip table and makes a rigid coupling which terminates in a single row of attachment bosses at the edge of the horizontal plate. This eliminates ineffective dissipation of the driving force in vibration tests
The free rigid body dynamics: generalized versus classic
In this paper we analyze the normal forms of a general quadratic Hamiltonian
system defined on the dual of the Lie algebra of real -
skew - symmetric matrices, where is an arbitrary real symmetric
matrix. A consequence of the main results is that any first-order autonomous
three-dimensional differential equation possessing two independent quadratic
constants of motion which admits a positive/negative definite linear
combination, is affinely equivalent to the classical "relaxed" free rigid body
dynamics with linear controls.Comment: 12 page
Conjugation spaces and edges of compatible torus actions
Duistermaat introduced the concept of ``real locus'' of a Hamiltonian
manifold. In that and in others' subsequent works, it has been shown that many
of the techniques developed in the symplectic category can be used to study
real loci, so long as the coefficient ring is restricted to the integers modulo
2. It turns out that these results seem not necessarily to depend on the
ambient symplectic structure, but rather to be topological in nature. This
observation prompts the definition of ``conjugation space'' in a paper of the
two authors with V. Puppe. Our main theorem in this paper gives a simple
criterion for recognizing when a topological space is a conjugation space.Comment: 19 page
Emissivity for CO_2 at Elevated Pressures
Total absorptivity measurements have been carried out at room temperature as a function of partial pressure of CO_2 and of total pressure using nitrogen as pressurizing gas
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