585,385 research outputs found
Omission of object verbal markers in Amele: Difference in data between Haia and Huar dialects
ページ数は出版物での記載を登
Constant-temperature molecular-dynamics algorithms for mixed hard-core/continuous potentials
We present a set of second-order, time-reversible algorithms for the
isothermal (NVT) molecular-dynamics (MD) simulation of systems with mixed
hard-core/continuous potentials. The methods are generated by combining
real-time Nose' thermostats with our previously developed Collision Verlet
algorithm [Mol. Phys. 98, 309 (1999)] for constant energy MD simulation of such
systems. In all we present 5 methods, one based on the Nose'-Hoover [Phys. Rev.
A 31, 1695 (1985)] equations of motion and four based on the Nose'-Poincare'
[J.Comp.Phys., 151 114 (1999)] real-time formulation of Nose' dynamics. The
methods are tested using a system of hard spheres with attractive tails and all
correctly reproduce a canonical distribution of instantaneous temperature. The
Nose'-Hoover based method and two of the Nose'-Poincare' methods are shown to
have good energy conservation in long simulations.Comment: 9 pages, 5 figure
Newton polyhedra and weighted oscillatory integrals with smooth phases
In his seminal paper, A. N. Varchenko precisely investigates the leading term
of the asymptotic expansion of an oscillatory integral with real analytic
phase. He expresses the order of this term by means of the geometry of the
Newton polyhedron of the phase. The purpose of this paper is to generalize and
improve his result. We are especially interested in the cases that the phase is
smooth and that the amplitude has a zero at a critical point of the phase. In
order to exactly treat the latter case, a weight function is introduced in the
amplitude. Our results show that the optimal rates of decay for weighted
oscillatory integrals, whose phases and weights are contained in a certain
class of smooth functions including the real analytic class, can be expressed
by the Newton distance and multiplicity defined in terms of geometrical
relationship of the Newton polyhedra of the phase and the weight. We also
compute explicit formulae of the coefficient of the leading term of the
asymptotic expansion in the weighted case. Our method is based on the
resolution of singularities constructed by using the theory of toric varieties,
which naturally extends the resolution of Varchenko. The properties of poles of
local zeta functions, which are closely related to the behavior of oscillatory
integrals, are also studied under the associated situation. The investigation
of this paper improves on the earlier joint work with K. Cho.Comment: 67pages. arXiv admin note: text overlap with arXiv:1208.392
Saving Wildlife around the World
Julia Back ’07 has been nose-to-nose with curious sea lions, beak-clacking albatross and ancient giant tortoises. Now she’s back in Oregon helping protect the wildlife she grew up around
Bent Nose Row
A young man joins a boxing club and learns some hard lessons about the world.
Articles, stories, and other compositions in this archive were written by participants in the Mighty Pen Project. The program, developed by author David L. Robbins, and in partnership with Virginia Commonwealth University and the Virginia War Memorial in Richmond, Virginia, offers veterans and their family members a customized twelve-week writing class, free of charge. The program encourages, supports, and assists participants in sharing their stories and experiences of military experience so both writer and audience may benefit
Recommended from our members
Nose-flute Player
A black and white photograph of a man playing a
nose flute in front of some recording equipment
- …