1,781 research outputs found
Long wavelength ultraviolet photoproduction of amino acids on the primitive earth
Amino acids produced by long UV irradiation of gas mixtures using hydrogen sulfide as initial photon acceptor, simulating prebiological earth condition
Exobiology and the origin of life
Abstracts on planetary studies and the search for extraterrestrial life are presented. Studies of the Jovian atmosphere were conducted. An assessment of the prospects for life on Mars is presented. And, the the means of contacting extraterrestrial civilizations is discussed
On the temperature dependence of possible S8 infrared bands in planetary atmospheres
Measurements of the temperature dependence between 77 and 333 K of the infrared spectrum of cyclic octatomic sulfur are reported. It is suggested that the 23 micrometer Jovian feature is not due to 3 sub 8 and that the temperature dependence of the frequency of the 835/cm band of S sub 8 may be a useful temperature marker in planetary studies
Silver jubilee seminar on "Antarctic Science: Indian contributions in global perspectives" at Goa
Commemorating the silver jubilee year (2006) of India’s
Antarctic Programmes, the National Centre for Antarctic
and Ocean Research organized a two day seminar on
“Antarctic Science: Indian Contributions in Global
perspectives” at Goa during May 25-26, 2006. The Seminar
was inaugurated on May 25, 2006 by the Chief Minister of
Goa, Shri Pratap Singh Rane in the august presence of
Dr. S.Z. Qasim, Former Member of Planning Commission
and the Leader of the first Indian Antarctic
First 'OCEANIBSA' meeting during 14-16 September, 2005 at Angra-dos-Reis, Brazil
India, Brazil and South Africa (IBSA) have entered into
science and technology cooperation especially to promote
applications of science and technology for the benefit of
common man. Oceanographic and Antarctic research have
been identified as one of the areas under the Science and
Technology cooperation. It is well known that India,
Brazil and South Africa have been coming closer on several
fronts with a collective benefit perspective. The India-Brazil- South Africa (IBSA) initiative includes strengthening and coordinating oceanographic and Antarctic activities as decided at the first meeting of IBSA Science and Technology Ministers (New Delhi, 2004), and further
endorsed at the meeting of the IBSA Working Group on
S&T (Cape Town, February, 2005)
Anti-isospectral Transformations, Orthogonal Polynomials and Quasi-Exactly Solvable Problems
We consider the double sinh-Gordon potential which is a quasi-exactly
solvable problem and show that in this case one has two sets of Bender-Dunne
orthogonal polynomials . We study in some detail the various properties of
these polynomials and the corresponding quotient polynomials. In particular, we
show that the weight functions for these polynomials are not always positive.
We also study the orthogonal polynomials of the double sine-Gordon potential
which is related to the double sinh-Gordon case by an anti-isospectral
transformation. Finally we discover a new quasi-exactly solvable problem by
making use of the anti-isospectral transformation.Comment: Revtex, 19 pages, No figur
Soliton Lattice and Single Soliton Solutions of the Associated Lam\'e and Lam\'e Potentials
We obtain the exact nontopological soliton lattice solutions of the
Associated Lam\'e equation in different parameter regimes and compute the
corresponding energy for each of these solutions. We show that in specific
limits these solutions give rise to nontopological (pulse-like) single
solitons, as well as to different types of topological (kink-like) single
soliton solutions of the Associated Lam\'e equation. Following Manton, we also
compute, as an illustration, the asymptotic interaction energy between these
soliton solutions in one particular case. Finally, in specific limits, we
deduce the soliton lattices, as well as the topological single soliton
solutions of the Lam\'e equation, and also the sine-Gordon soliton solution.Comment: 23 pages, 5 figures. Submitted to J. Math. Phy
The Copper Smelter at Ghatsila
The layout of the plant descriptions and operations of the different equipment at the works of Mcssrs Indian Copper Corporation Ltd., Ghatsila,have been briefly described. The smelter treats froth-floated chalcopyrite concentrate containing 24-26 per cent Cu to produce a matte containing
40-42 per cent Cu. The conversion of the matte to blister copper in converters has been described.The refined copper contains 025 per cent Ni. The refining practice has been detailed
Truncated Harmonic Osillator and Parasupersymmetric Quantum Mechanics
We discuss in detail the parasupersymmetric quantum mechanics of arbitrary
order where the parasupersymmetry is between the normal bosons and those
corresponding to the truncated harmonic oscillator. We show that even though
the parasusy algebra is different from that of the usual parasusy quantum
mechanics, still the consequences of the two are identical. We further show
that the parasupersymmetric quantum mechanics of arbitrary order p can also be
rewritten in terms of p supercharges (i.e. all of which obey ).
However, the Hamiltonian cannot be expressed in a simple form in terms of the p
supercharges except in a special case. A model of conformal parasupersymmetry
is also discussed and it is shown that in this case, the p supercharges, the p
conformal supercharges along with Hamiltonian H, conformal generator K and
dilatation generator D form a closed algebra.Comment: 9 page
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