UNDERGROUND WIRELESS COMMUNICATION CHANNEL MODELING AND SIMULATION USING 0.3GMSK MODULATION CONSIDERING PENETRATION AND SCATTERING LOSS

Wireless communication inside mines and tunnels is very different from that in terrestrial environment because of the strong attenuation of signals. Here, we are developing an empirical model for the underground wireless communication channel based on experimental data which help in predicting the average received signal strength at a given distance from transmitter. The model aims at adding correction factors to the available outdoor and indoor propagation models such as Okumara-hata model, cost231 model, ITU indoor propagation models etc. Modeling is done by choosing the most appropriate model among the available ones and performing regression methods to the model based on experimental data. Correction factors are then added based on two parameters which we are considering namely- Penetration and Scattering loss for 0.3GMSK

കൂടുമത്സ്യ കൃഷിയ്ക്ക് ഒരു നൂതന സാങ്കേതിക വിദ്യ : അഴിച്ചു മാറ്റി വീണ്ടും യോജിപ്പിക്കാവുന്ന ചെലവു കുറഞ്ഞ കൂടുകൾ Modern Technology for Cage Culture: Dismantling and Re-Assembling Type Low Cost Cages

The Galvanized iron (GI) cage frames have been designed and fabricated by CMFRI as a cost-effective alternative for high density polyethylene (HDPE) cage frames. By this the cost has been reduced to one third or even less with high durability and life span with regular maintenance. Dismantling and reassembling type cages have been proved successful in open water aquaculture at Cochin

Viral diseases of cardamom (Elettaria cardamomum Maton) and their management

Small cardamom (Elettaria cardamomum Maton) is affected by many diseases which have been identified as a major production constraint. Among the viral diseases 'katte' or mosaic is the major viral disease causing severe yield losses to an extent of 68 per cent. In addition, Nilgiri necrosis, infectious variegation virus and 'kokke kandu' diseases are gaining importance in recent years. The present paper reviews the information available on distribution of viral diseases, symptomatology, crop loss, transmission, etiology, host range and disease management. The future plan of work on aspects such as breeding for disease resistance through genetic engineering, virus characterization and early detection methods are indicated. &nbsp

Natural disease escapes as sources of resistance against cardamom mosaic virus causing katte disease of cardamom (Elettaria cardamomum Maton)

Resistant sources to cardamom mosaic virus causing katte disease of cardamom (Elettaria cardamomum) were identified by collecting 134 disease escapes from hot spots of virus infection in South India and screening them in greenhouse, sick plot and hot spots. Testing of promising collections in four hot spots and also against natural infection confirmed the resistant nature of the collections. &nbsp

Natural disease escapes as sources of resistance against cardamom mosaic virus causing katte disease of cardamom (Elettaria cardamomum Maton)

Resistant sources to cardamom mosaic virus causing katte disease of cardamom (Elettaria cardamomum) were identified by collecting 134 disease escapes from hot spots of virus infection in South India and screening them in greenhouse, sick plot and hot spots. Testing of promising collections in four hot spots and also against natural infection confirmed the resistant nature of the collections. &nbsp

Paradidymis – Fact/Fiction and its Significance

AbstractA 30-year old infertile male was admitted for microsurgical sub inguinal varicocelectomy. Intraoperatively, two tubular structures of the caliber of neighboring veins were noted. They were distinct from the vas, which was carefully preserved. Histopathology revealed varicose veins along with two convoluted tubular structures lined by ciliated pseudo-stratified epithelium. There was an incomplete thin muscle coat. The lumina were irregular and contained no spermatozoa (Fig. 1). These structures were identified as paradidymis based on the location in the cord and microscopic morphology. We have tried to analyze the medico-legal significance of these benign lesions in our every day practice

Bidirectional Growth based Mining and Cyclic Behaviour Analysis of Web Sequential Patterns

Web sequential patterns are important for analyzing and understanding users behaviour to improve the quality of service offered by the World Wide Web. Web Prefetching is one such technique that utilizes prefetching rules derived through Cyclic Model Analysis of the mined Web sequential patterns. The more accurate the prediction and more satisfying the results of prefetching if we use a highly efficient and scalable mining technique such as the Bidirectional Growth based Directed Acyclic Graph. In this paper, we propose a novel algorithm called Bidirectional Growth based mining Cyclic behavior Analysis of web sequential Patterns (BGCAP) that effectively combines these strategies to generate prefetching rules in the form of 2-sequence patterns with Periodicity and threshold of Cyclic Behaviour that can be utilized to effectively prefetch Web pages, thus reducing the users perceived latency. As BGCAP is based on Bidirectional pattern growth, it performs only (log n+1) levels of recursion for mining n Web sequential patterns. Our experimental results show that prefetching rules generated using BGCAP is 5-10 percent faster for different data sizes and 10-15% faster for a fixed data size than TD-Mine. In addition, BGCAP generates about 5-15 percent more prefetching rules than TD-Mine.Comment: 19 page

Phylogenetic Diversity of Bacterial Community Associated with the Marine Sponge Halichondira nigrocutis Collected off Southwest Indian Coast

This study aimed to evaluate the bacterial communities associated with the marine sponge Halichondria nigrocutis present in Indian waters by both cultivation and cultivation-independent techniques. Results using cultivation method showed that bacteria belonging to Bacillus, Acinetobacter and Vibrio spp. to be the predominant groups. Metagenomic study of sponge-associated bacteria by cultivation independent approach, involving cloning and sequencing of the 16S rDNA gene generated sequences that were subjected to phylogenetic analysis. Results demonstrated the community structure to be represented by the phyla Proteobacteria (alpha-, gamma- and delta-classes), Cyanobacteria, Actinobacteria and Firmicutes, with isolates belonging to alpha-proteobacterial group to be predominating. To our knowledge this study appears to be the first to record cultivable and uncultivable bacterial groups associated with H.nigrocutis from Indian waters

IISR Avinash – a rhizome rot resistant and high yielding variety of cardamom (Elettaria cardamomum Maton)

The cardamom (Elettaria cardamomum)  variety, IISR Avinash (RR-1) was developed at theIndian Institute of Spices Research, Cardamom Research Centre, Appangala (Karnataka),through clonal selection and recommended for release for its resistance to rhizome rot dis-ease and high yield. The average yield of IISR Avinash was 643 kg ha-1 (dry) with a poten-tial yield of 979 kg ha-1 (dry) with good quality dark green capsules. &nbsp