Výsledky vyhledávání - "B. R. SITARAM"

A model study on the decay of volcanic aerosol layer and verification with Pinatubo and El Chichon data

Autor: S. Ramachandran, Achuthan Jayaraman, B. R. Sitaram

Publikováno v: Scopus-Elsevier

The time evolution of stratospheric aerosol layer formed after a volcanic eruption is studied taking into account the aerosol microphysical processes of growth, coagulation and sedimentation. Using a simple model we could explain the observed evoluti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd28d832561919efc5c2a1bb264140e2
https://doi.org/10.1007/bf02839287

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Differentiability of invariants and Liapunov equations in Hamiltonian systems

Autor: B R Sitaram

Publikováno v: Pramana. 49:193-197

In this communication, we investigate the behavior of the derivatives of invariants for Hamiltonian systems, using information derived from an analysis of the Liapunov exponents of the system. We show that under certain conditions on the analyticity

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d75fadc3fd8640a4654b7c10a6c8569
https://doi.org/10.1007/bf02845854

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Time dependent canonical perturbation theory III: Application to a system with nonconstant unperturbed frequencies

Autor: B R Sitaram, Mitaxi Mehta

Publikováno v: Pramana. 46:323-329

In this communication, we report the results of the application of time dependent perturbation theory to a non-integrable Hamiltonian which is a perturbation on a Hamiltonian with nonconstant frequencies. The theory provides good time dependent local

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c39eb243d982cc5c584a99c707be74e2
https://doi.org/10.1007/bf02847006

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Time dependent canonical perturbation theory II: Application to the Henon-Heiles system

Autor: Mitaxi Mehta, B R Sitaram

Publikováno v: Pramana. 45:149-164

In this communication, we report the results of the application of time-dependent perturbation theory to the Henon-Heiles system. We show that the predictions of the perturbation theory hold good for short times, and try to explain the increase of er

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86796b338a2761e92778d401171d4b70
https://doi.org/10.1007/bf02848258

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Time dependent canonical perturbation theory I: General theory

Autor: B R Sitaram, Mitaxi Mehta

Publikováno v: Pramana. 45:141-148

In this communication, we reanalyze the causes of the singularities of canonical perturbation theory and show that some of these singularities can be removed by using time-dependent canonical perturbation theory. A study of the local and global prope

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::288fdb1f1fe98d6ab812c13c24224f8e
https://doi.org/10.1007/bf02848257

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Invariants of chaotic Hamiltonian systems

Autor: B R Sitaram

Publikováno v: Pramana. 44:295-302

The invariants of chaotic bounded Hamiltonian systems and their relation to the solutions of the first variational equations of the equations of motion are studied. We show that these invariants are characterized by the fact that they either lose the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5e0e94ef3b488f8329363be85a24ef19
https://doi.org/10.1007/bf02847606

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Lie supergroups and graded Lie groups

Autor: B. R. Sitaram

Publikováno v: Group Theoretical Methods in Physics ISBN: 9783540122913

We study in this communication, the basic differences in the properties of Lie supergroups and graded Lie groups with regard to uniqueness, representations and classification.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ae83e51d387fff21b6e88ce9d9540f58
https://doi.org/10.1007/3-540-12291-5_11

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DIURNAL RHYTHM AND TURNOVER OF TRYPTOPHAN HYDROXYLASE IN THE PINEAL GLAND OF THE RAT

Autor: G. J. Lees, B. R. Sitaram

Publikováno v: Journal of Neurochemistry. 31:1021-1026

Tryptophan hydroxylase in the pineal gland of the rat was found to undergo a diurnal rhythm in activity with an elevated activity at night. The rhythm was abolished in constant light. Cycloheximide (15 mg/kg, i.p.), administered both at night and dur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77af35571679972c6e7df042f8e5c139
https://doi.org/10.1111/j.1471-4159.1978.tb00142.x

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