മത്സ്യപോഷണവും തീററയുല്പാദനവും (Fish nutrition and feed production)

Man began to think of fish culture when he realised that the oceans and other waterbodies could not provide sufficient fish to meet the demand of increasing population. This led to the beginning of studies on the reproduction and nutritional requirements of different species of fish. Fish that grow in natural waters get their food from their environment. They move in the sea, lake or river in search of food and favourable conditions for growth and reproduction. When fish are stocked in ponds and farms they have to get additional supply of nutrients fi*om external sources

Hydrodynamic coupling between two fluid membranes

The coupled in-plane diffusion dynamics between point-particles embedded in stacked fluid membranes are investigated. We calculate the contributions to the coupling longitudinal and transverse diffusion coefficients due to particle motion within the different as well as the same membranes. The stacked geometry leads to a hydrodynamic coupling between the two membranes.Comment: 9 Pages, 5 figures. Accepted for publication in J. Phys.: Condens. Matte

Empirical Determination of Threshold Partial Wave Amplitudes in pp→ppωp p \to p p \omega

Using the model independent irreducible tensor approach to $\omega$ production in $pp$ collisions, we show theoretically that, it is advantageous to measure experimentally the polarization of $\omega$, in addition to the proposed experimental study employing a polarized beam and a polarized target.Comment: 6 pages, 1 Table, Latex-2

Effects of an embedding bulk fluid on phase separation dynamics in a thin liquid film

Using dissipative particle dynamics simulations, we study the effects of an embedding bulk fluid on the phase separation dynamics in a thin planar liquid film. The domain growth exponent is altered from 2D to 3D behavior upon the addition of a bulk fluid, even though the phase separation occurs in 2D geometry. Correlated diffusion measurements in the film show that the presence of bulk fluid changes the nature of the longitudinal coupling diffusion coefficient from logarithmic to algebraic dependence of 1/s, where s is the distance between the two particles. This result, along with the scaling exponents, suggests that the phase separation takes place through the Brownian coagulation process.Comment: 6 pages, 5 figures. Accepted for publication in Europhys. Let

Quality Improvement in Higher Education Through Normalization of Student Feedback Data Using Evolutionary Algorithm

Student Feedback is a vital information that helps not only to evaluate the existing academic practices but also to rectify the discrepancies if any, enabling continuous quality improvement. Often the educational institutions make decisions on the teaching and delivery strategies and requirements of the students based on the students’ Feedback. Due to various factors like the composition of the class in terms of student background, personal relationship with the teacher and other factors, the Feedback generally remains so scattered that at times it may not be possible to arrive at a conclusion based on the feedback. Any decision, based on this already obscure feedback, can only be flawed. This underscores the necessity of normalizing the Feedback data so that one can elicit a clear numerical value for each item in questionnaire rather than quantifying the same in terms of number of responses ‘for’ and ‘against’ the item. Employing an artificial intelligence method, this paper aims at developing an efficient scheme for the analysis of students’ Feedback taking into account the above mentioned factors. Because of its ease of use, the proposed feedback evaluation mechanism can be used on monthly basis in a given academic year, thus achieving continuous improvement of quality. It is hoped that this can serve as an effective tool in improving the learning and teaching methods, standards of education and ultimately the quality of higher education

Marine Fisheries Policy Brief-1 സമുദ്ര മത്സ്യമേഖലാ നയ പരിപ്രേക്‌ഷ്യം - 1 കേരളം (Marine Fisheries Policy Brief-1 Kerala Malayalam version)

Marine Fisheries Policy Brief-1 സമുദ്ര മത്സ്യമേഖലാ നയ പരിപ്രേക്‌ഷ്യം - 1 കേരളം (Marine Fisheries Policy Brief-1 Kerala Malayalam version

Marine Fisheries Policy Brief-1 Kerala

Kerala which has a coastline of 590 km ranks first in marine fish production of India, contributing nearly 25% (5.81 lakh tonnes on average) to the total annual production. The export of marine products from the State earns valuable foreign exchange besides affording innumerable job opportunities in the industry. The population depending on fisheries has steadily increased over the years and stood at 6,02,234 in 2005 (Anon., 2005). Kerala has been in the forefront of absorbing innovative and new technologies in fishing practices, which have led the marine fisheries sector to take a complex structure. The 1980s was an important period in the development of marine fisheries in Kerala. In the first half of the period the motorized sector grew rapidly and became the most important sector yielding the maximum catch in 1988. By that time, ringseine became very popular in exploiting the pelagic resources and replaced the boatseines to a very great extent. Huge size of the new net (450 to 1000 m long) and large number of crew (30 to 50) needed for its operation necessitated larger boats with high capacity outboard engines (3 outboard engines of 40 hp each). This facilitated extension of fishing grounds for the motorized sector. The fishing grounds covered by the mechanised sector also extended by increasing the boat size and fishing effort and efficiency through multi-day fishing during the late 90s