منابع مشابه
Rolling Tachyons from Liouville theory
In this work we propose an exact solution of the c = 1 Liouville model, i.e. of the world-sheet theory that describes the homogeneous decay of a closed string tachyon. Our expressions are obtained through careful extrapolation from the correlators of Liouville theory with c ≥ 25. In the c = 1 limit, we find two different theories which differ by the signature of Liouville field. The Euclidean l...
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The texture of a rolling circle depicts the translational and rotational components of its motion. In the case of a homogeneous circle, however, visual cues to the rotational component of motion are absent. To examine how the visual system resolves undetermined motion cues, optically neutral circles were displaced so that changes in their orientation were invisible. Contextual cues systematical...
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The rolling motion of a rigid cylinder on an inclined flat viscous surface is investigated and the nonlinear resistance force against rolling, FR(v), is derived. For small velocities FR(v) increases with velocity due to increasing deformation rate of the surface material. For larger velocity it decreases with velocity due to decreasing contact area between the rolling cylinder and the deformed ...
متن کاملCylinder Rolling on Another Rolling Cylinder
This problem was suggested by Bradley Klee. For the related case of one cylinder rolling inside another, see [1]. When one cylinder is directly above the other, we define the line of contact of the lower cylinder, 1, with the horizontal plane to be the z-axis, at x = y = 0. Then, the condition of rolling without slipping for the lower cylinder is that when it has rolled (positive) distance x1, ...
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We find exact rolling tachyon solutions in DBI type noncommutative field theory with constant open string metric and noncommutative parameter on an unstable Dp-brane. Their functional shapes span all possible homogeneous rolling tachyon solutions, i.e., they are hyperbolic-cosine, hyperbolic-sine, and exponential under 1/ cosh runaway NC tachyon potential. Even if general DBI type NC electric f...
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ژورنال
عنوان ژورنال: Journal of Japan Institute of Light Metals
سال: 2007
ISSN: 0451-5994,1880-8018
DOI: 10.2464/jilm.57.256