5,866 research outputs found
Symmetry and Conservation Laws in Semiclassical Wave Packet Dynamics
We formulate symmetries in semiclassical Gaussian wave packet dynamics and
find the corresponding conserved quantities, particularly the semiclassical
angular momentum, via Noether's theorem. We consider two slightly different
formulations of Gaussian wave packet dynamics; one is based on earlier works of
Heller and Hagedorn, and the other based on the symplectic-geometric approach
by Lubich and others. In either case, we reveal the symplectic and Hamiltonian
nature of the dynamics and formulate natural symmetry group actions in the
setting to derive the corresponding conserved quantities (momentum maps). The
semiclassical angular momentum inherits the essential properties of the
classical angular momentum as well as naturally corresponds to the quantum
picture.Comment: 22 pages, 2 figure
Analyzing covert social network foundation behind terrorism disaster
This paper addresses a method to analyze the covert social network foundation
hidden behind the terrorism disaster. It is to solve a node discovery problem,
which means to discover a node, which functions relevantly in a social network,
but escaped from monitoring on the presence and mutual relationship of nodes.
The method aims at integrating the expert investigator's prior understanding,
insight on the terrorists' social network nature derived from the complex graph
theory, and computational data processing. The social network responsible for
the 9/11 attack in 2001 is used to execute simulation experiment to evaluate
the performance of the method.Comment: 17pages, 10 figures, submitted to Int. J. Services Science
Reflective visualization and verbalization of unconscious preference
A new method is presented, that can help a person become aware of his or her
unconscious preferences, and convey them to others in the form of verbal
explanation. The method combines the concepts of reflection, visualization, and
verbalization. The method was tested in an experiment where the unconscious
preferences of the subjects for various artworks were investigated. In the
experiment, two lessons were learned. The first is that it helps the subjects
become aware of their unconscious preferences to verbalize weak preferences as
compared with strong preferences through discussion over preference diagrams.
The second is that it is effective to introduce an adjustable factor into
visualization to adapt to the differences in the subjects and to foster their
mutual understanding.Comment: This will be submitted to KES Journa
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