Study of the hydrological features of the shelf water along the west coast of India with an attempt to explain their influence upon the living resources of the region

The objective of the present study is to elucidate the hydrological conditions of the shelf waters along the southern half or the west coast of India and their relation to the sooplankton bionase and pelagic fish resources. Data from six hydrography-plankton sections worked during the 1972-75 period of cape camerin. Quilon. cochin. Kasaragod. Karwar and kotnagiri formed the basis of the present study.Stations were fixed along the transects 10 nautical miles apart. Starting with the first station at around 15 metre depth and were usually occupied 5 to 8 times in an year at an interval of about 6 weeks. Data relating to oil sardines and macherel fisheries were availed from published information relating to the period mainly of the Central Marine fisheries Research Institute. The range of different parameters namely temperature. salinity. density and dissolved oxygen at different depths and their sloping features against the coast are discussed. Three seasons. namely south-west monsoon (summer monsoon). north-east monsoon (winter monsoon) and hot weather season are designated and data of the core months of each of these seasons considered in the study

A stepping-stone in developing marine fish gene bank

The science of cryogenic preservation of fertile semen is not only meant for understanding the basic life secret, but also propagating living resources in long run. Efforts are being continuously made world over to evolve suitable methods of obtaining sperms through creation of gamete banks so that through artificial fertilization one will be able to produce the seeds at any time of the year. The central marine fisheries research institute engaged actively for the past 3 years in cryopreservation studies. Through the extensive Research efforts a breakthrough was made in evolving a viable technique for short term and long term preservation of sperm motility of fish liza parsia at —10°c and —196°c temperature respectivel

Impact of diesel spill on Acanthus ilicifolius at Mangalavanam

This paper explains the death and drying up of Acanthus ilicifolius population at mud flats of Managalavanam due to the impact of diesel spill

Novel Scheme for Minimal Iterative PSO Algorithm for Extending Network Lifetime of Wireless Sensor Network

Clustering is one of the operations in the wireless sensor network that offers both streamlined data routing services as well as energy efficiency. In this viewpoint, Particle Swarm Optimization (PSO) has already proved its effectiveness in enhancing clustering operation, energy efficiency, etc. However, PSO also suffers from a higher degree of iteration and computational complexity when it comes to solving complex problems, e.g., allocating transmittance energy to the cluster head in a dynamic network. Therefore, we present a novel, simple, and yet a cost-effective method that performs enhancement of the conventional PSO approach for minimizing the iterative steps and maximizing the probability of selecting a better clustered. A significant research contribution of the proposed system is its assurance towards minimizing the transmittance energy as well as receiving energy of a cluster head. The study outcome proved proposed a system to be better than conventional system in the form of energy efficiency

GFRP - FAILURE CHARACTERISTICS ANALYSIS

The objective of this paper is to predict the ultimate failure load and also is to characterize the failure modes in GFRP composite coupons using Multi linear regression. IBM SSPS20 version is used to predict the ultimate failure load using Multi linear regression with failure loads as dependent variable and the load range of 10kg each and its corresponding hits as independent variable. The three point bending test was conducted on the GFRP composite coupons till failure of the GFRP composite coupons. Based on the effect of various failure modes the ultimate failures of the specimen were also predicted by means of multi linear regression method. Â

Combining technologies to create bioactive hybrid scaffolds for bone tissue engineering

Combining technologies to engineer scaffolds that can offer physical and chemical cues to cells is an attractive approach in tissue engineering and regenerative medicine. In this study, we have fabricated polymer-ceramic hybrid scaffolds for bone regeneration by combining rapid prototyping (RP), electrospinning (ESP) and a biomimetic coating method in order to provide mechanical support and a physico-chemical environment mimicking both the organic and inorganic phases of bone extracellular matrix (ECM). Poly(ethylene oxide terephthalate)-poly(buthylene terephthalate) (PEOT/PBT) block copolymer was used to produce three dimensional scaffolds by combining 3D fiber (3DF) deposition, and ESP, and these constructs were then coated with a Ca-P layer in a simulated physiological solution. Scaffold morphology and composition were studied using scanning electron microscopy (SEM) coupled to energy dispersive X-ray analyzer (EDX) and Fourier Tranform Infrared Spectroscopy (FTIR). Bone marrow derived human mesenchymal stromal cells (hMSCs) were cultured on coated and uncoated 3DF and 3DF + ESP scaffolds for up to 21 d in basic and mineralization medium and cell attachment, proliferation, and expression of genes related to osteogenesis were assessed. Cells attached, proliferated and secreted ECM on all the scaffolds. There were no significant differences in metabolic activity among the different groups on days 7 and 21. Coated 3DF scaffolds showed a significantly higher DNA amount in basic medium at 21 d compared with the coated 3DF + ESP scaffolds, whereas in mineralization medium, the presence of coating in 3DF+ESP scaffolds led to a significant decrease in the amount of DNA. An effect of combining different scaffolding technologies and material types on expression of a number of osteogenic markers (cbfa1, BMP-2, OP, OC and ON) was observed, suggesting the potential use of this approach in bone tissue engineerin

Novel Bacteria Foraging Optimization for Energy-efficient Communication in Wireless Sensor Network

Optimization techniques based on Swarm-intelligence has been reported to have significant benefits towards addressing communication issues in Wireless Sensor Network (WSN). We reviewed the most dominant swarm intelligence technique called as Bacteria Foraging Optimization (BFO) to find that there are very less significant model towards addressing the problems in WSN. Therefore, the proposed paper introduced a novel BFO algorithm which maintains a very good balance between the computational and communication demands of a sensor node unlike the conventional BFO algorithms. The significant contribution of the proposed study is to minimize the iterative steps and inclusion of minimization of both receiving / transmittance power in entire data aggregation process. The study outcome when compared with standard energy-efficient algorithm was found to offer superior network lifetime in terms of higher residual energy as well as data transmission performance

Cryobanking potentials of marine shrimp gametes

For developing marine shrimp industry through aquaculture technology, one of the major constraints is non-availability of sufficient seed and spawners to produce seed at the desired time. Cryopreservation of gametes of aquatic animals in contrast to the situation in other vertebrates particularly mammals has met with a very limited success. Very few attempts have been made on cryopreservation of sperms in decapod crustaceans in general and marine shrimps in particular. Efforts are now being made continuously on cryopreservation and cryobanking of penaeid gametes. The viable spermatozoa of P. indicus and P. monodon havebeen successfully preserved in CMFRI

Agricultural wastes as a supplementary source of energy: An economic assessment of a briquette making facility

For commercialization of crop based biomass briquetting technology and alternate source of energy model, is essential to know whether the technology is economically viable or not. In view of this, an attempt was made to analyze the economics of the biomass briquettes prepared by utilizing unused agricultural byproducts and other selected biomass produced from different crop residues. Biomass briquetting is one among the processes of converting low bulk density biomass into high density and energy concentrated fuel referred as briquette and has scope to use as fuel energy for food preparation by the rural households. India continued to roll its economy with agriculture whose energy requirement is increasing day by day with the progress made in agricultural sector. Under the existing situation, day to day’s demand for fuel energy for food preparation at rural households observed to be very high and women folk struggle hard to gather fuel for food preparation. On the other hand, in India plenty of biomass is available due to vast agricultural based crop production systems. The per annum current availability of biomass in India is estimated at 1,249 million tons. With this advantage, to minimize the drudgery of rural women folk and to fulfill rural house hold demand for fuel energy required for food preparation, could only be addressed by the means production of biomass briquettes which provides cost effective and good fuel energy source for rural households for cooking food every day. The economics of biomass briquettes production indicated per month average net return ofINR80,000to the briquette machine owner. The project appraisal with other financial indicators for biomass briquettes production had indicated desired, theNet Present Value, Internal Rate of Return, Benefit-Cost Ratio and Payback Period were observed to be INR3931, 245, >30 per cent, 2.21 and 3.00 years respectively