Solutions to Cosmological Problems with Energy Conservation and Varying c, G and Lambda

The flatness and cosmological constant problems are solved with varying speed of light c, gravitational coupling strength G and cosmological parameter Lambda, by explicitly assuming energy conservation of observed matter. The present solution to the flatness problem is the same as the previous solution in which energy conservation was absent.Comment: 5 pages, Replaced with LaTex file with minor change

Utilisation of clam meat as feed in the shrimp farms of Kerala

Of late there has been an upsurge in shrimp culture practices in many parts of the country. Kerala with an estimated brackish water area of 65000 ha suitable for shrimp culture has witnessed a slow but steady change from the traditional system of farming to the more profitable scientific type of farming with different fast growing species like Penaeus indicus and P. monodon

From effective actions to the background geometry

We discuss how the background geometry can be traced from the one-loop effective actions in nonsupersymmetric theories in the external abelian fields. It is shown that upon the proper identification of the Schwinger parameter the Heisenberg-Euler abelian effective action involves the integration over the $AdS_3$, $S_3$ and $T^{*}S^3$ geometries, depending on the type of the external field. The interpretation of the effective action in the sefdual field in terms of the topological strings is found and the corresponding matrix model description is suggested. It is shown that the low energy abelian MHV one-loop amplitudes are expressed in terms of the type B topological string amplitudes in mirror to $T^{*}S^3$ manifold. We also make some comments on the relation between the imaginary part of the effective action and the branes in SU(2) as well as on the geometry of the contours relevant for the path integral.Comment: Latex. 40 pages, typos corrected, references adde

Brane World Dynamics and Adiabatic Matter creation

We have treated the adiabatic matter creation process in various three-brane models by applying thermodynamics of open systems. The matter creation rate is found to affect the evolution of scale factor and energy density of the universe. We find modification at early stages of cosmic dynamics. In GB and RS brane worlds, by chosing appropriate parameters we obtain standard scenario, while the warped DGP model has different Friedmann equations. During later stages, since the matter creation is negligible the evolution reduces to FRW expansion, in RS and GB models.Comment: Replaced with TEX file,No figures, Corrected References and typos. Accepted in IJMP

Rotifer as live feed for larviculture of marine fishes - a research review

The most critical factor in the commercial farming offish and shellfish is the dependable availability of healthy fry produced in hatcheries. Most of the fishes having aquaculture potential have larvae with very limited yolk reserves and the transition stage from endogenous to exogenous feeding is very critical, often resulting in mass mortalities. The recent success in the consistent supply of many marine and brackish water fish seeds can be attributed to the mass production technologies of high quality live feeds

Calibrations of hydro-acoustic instruments onboard FORV Sagar Sampada

Calibration is carried out to keep up the precision of the instruments by determining their calibre. CaUbration of hydro acoustic equipments onboard FORV Sagar Sampada was carried out periodically and the performance records were maintained. Deviation and the deficiencies were noted down for applying the correction while interpreting the output of the instruments

Tuna live-bait fishes - their exploitation, conservation and management in Lakshadweep

The total annual catch of baitfishes form pole and line fishing areas of Lakshadweep is estimated to be 1251. At Minicoy, the average annual catch is estimated at 9.11 and at Agatti it is estimated to be 51 t. Data from other baitfish fishing areas such as Suheli, Valiapani and Cheriyapani are virtually non-existent. Management options suggested earlier include the collection of fishery data from more areas, studying the biology and understanding the stock of exploited species, culture of suitable species and maintaining the health of the coral reefs of the islands. Future thrust areas for research to elucidate the factors that determine the baitfish fishery include a full review of the existing fishery and development of a baitfish statistics collection system

An AdS_3 Dual for Minimal Model CFTs

We propose a duality between the 2d W_N minimal models in the large N 't Hooft limit, and a family of higher spin theories on AdS_3. The 2d CFTs can be described as WZW coset models, and include, for N=2, the usual Virasoro unitary series. The dual bulk theory contains, in addition to the massless higher spin fields, two complex scalars (of equal mass). The mass is directly related to the 't Hooft coupling constant of the dual CFT. We give convincing evidence that the spectra of the two theories match precisely for all values of the 't Hooft coupling. We also show that the RG flows in the 2d CFT agree exactly with the usual AdS/CFT prediction of the gravity theory. Our proposal is in many ways analogous to the Klebanov-Polyakov conjecture for an AdS_4 dual for the singlet sector of large N vector models.Comment: 33 pages LaTe

Marine Ornamental Fishes

Ornamental fishes are fascinating for their brilliant and attractive colouration/pattern, tiny size and their ability to adapt in confined aquarium tanks. These fishes are a fancy for the people all over the world and aquarium fish keeping has been developed as a hobby by many. The world ornamental fish industry has been growing rapidly over the years. The total turnover, has been estimated over 5 billion US $, of which India's contribution is less than 1%

Problems and prospects of marine fisheries at Lakshadweep

The live-bait fishes play a pivotal role in the development and success of the pole-and-line fishery in Lakshadweep. The total live-bait fish catch from this insular area is estimated to be 125 t in recent years. The major groups exploited at Minicoy are clupeids, caesionids and apogonids. The clupeid, Spratelloides delicatulus is the only species caught as bait in the northern islands. The major fishing areas for live-baits are Minicoy, Agatti, Suheli, Perumal Par, Bitra, Valiapani and Cheriyapani. Both meteorological and hydrographical factors influence the recruitment of migratory groups to the lagoon, while resident forms depend on the recruitment success.The Lakshadweep sea is estimated to have an annual fisher