Restrictive dermatopathy: a lethal congenital dermatosis and review of literature.
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Biopsy↗
Biomedical subjects
V K Chandrasekar
Publications and source records attributed to V K Chandrasekar.
Unusual Liénard-type nonlinear oscillator.
A Liénard type nonlinear oscillator of the form x+kxx+(k2/9)x3+lambda1x=0, which may also be considered as a generalized Emden-type equation, is shown to possess unusual nonlinear dynamical properties. It is shown to admit explicit nonisolated periodic orbits of conservative Hamiltonian type for lambda1>0. These periodic orbits exhibit the unexpected property that the frequency of oscillations is completely independent of amplitude and continues to remain as that of the linear harmonic oscillator. This is completely contrary to the standard characteristic property of nonlinear oscillators. Interestingly, the system though appears deceptively a dissipative type for lambda1< or =0 does admit a conserved Hamiltonian description, where the characteristic decay time is also independent of the amplitude. The results also show that the criterion for conservative Hamiltonian system in terms of divergence of flow function needs to be generalized.
Journal Article↗
Kabuki make-up syndrome.
Kabuki make-up syndrome is a rare disorder characterized by mental retardation, postnatal dwarfism and peculiar facies. This condition is believed to be common in Japan, but has been reported from other parts of the world. The authors report a case of this syndrome in an eight-year-old girl, with the characteristic findings from India.
Abnormalities, Multiple↗