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FOCUS
My current research interests are in nonlinear dynamics and nonequilibrium
statistical physics.
SELECTED
PROJECTS
- Solitons in particulate media and applications of nonlinear acoustics
in the detection of buried objects, such as antipersonnel land mines
and buried structures and in achaeology
- Nonlinear dynamical methods for extracting selected particles from
colloidal systems and their applications in novel ink-jet printing technology
- Power laws, slow relaxation, and slow evolution in classical and quantum
many- and few-particle systems
- Physics education and research with young children and high schoolers
PUBLICATIONS
- S. Sen and M. Manciu. Discrete Hertzian systems and solitons. Physica
A 268:644 (1999).
- R. S. Sinkovits, S. Sen, J. C. Phillips, and S. Chakravarti. Slow
relaxation in quartic potentials and related results. Phys. Rev.
E 60:6497 (1999).
- S. Sen, M. Manciu, and F. S. Manciu. Election of ferrofluid grains
using nonlinear acoustic impulses. Appl. Phys. Lett. (in press,
1999).
- S. Sen, M. Manciu, and J. D. Wright. Soliton-like pulses in perturbed
and driven Hertzian chains and their possible applications in detecting
buried impurities. Phys. Rev. E 57:2386 (1998).
- S. Sen and T. D. Blersch. Stretched exponential-like relaxation of
a magnetic impurity in the s=1/2 XY chain. Physica A 253:178
(1998).
- D. P. Visco Jr. and S. Sen. A study of the dynamics of a nonlinear
oscillator that is coupled to various model heat baths. Phys. Rev.
E 58:1419 (1998).
- S. Sen, R. S. Sinkovits, and S. Chakravarti. Algebraic relaxation
laws for classical particles in anharmonic potentials. Phys. Rev.
Lett. 77:4855 (1996).
- R. S. Sinkovits and S. Sen. Nonlinear dynamics in granular columns.
Phys. Rev. Lett. 74:2686 (1995).
- Z. X. Cai, S. Sen, and S. D. Mahanti. Long time dynamics via direct
summation of infinite continued fractions. Phys. Rev. Lett. 68:1637
(1992).
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Fig. 1 W measures the roughness
of a slope in a grain pile. The figure shows a minimization of W at the
instant at which an avalanche commences on the slope. Theta refers to
the tilt angle of the slope.
Fig. 2 The simulated pictures
represent snapshots of a layer as it gets distorted due to increasing
substrate roughness. The white patches represent regions of high distortion.
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