Single and three way crosses for generating composite populations in rapeseed

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A viable short-term strategy for breeding composite populations

A viable short-term strategy has been outlined to breed productive composite populations. The major steps in the strategy are generating a base gene pool, reordering it into a productive gene pool by appropriate systems of mating and siphoning composite populations through effective selection. The strategy was field tested in Pennisetum typhoides and Brassica campestris and found efficient. The utility and implication of this strategy are discussed

An approach to population improvement in self compatible turnip-rape

A total of 233 single plant selection were made from diverse sources of self-incompatible brown-seeded turnip-rape [Brassica rapa (Linn.) The4ll, emend, Metzger var. napus Linn. Sensu stricto]. The progenies were tested for important attributes during 1978-79. Ten initial gene pools were constituted with the genotypes selected based on critical norm fixed for corresponding component character. An additional population was constituted with genotypes following beyond the critical mean for 5 out of 10 yield attributes. Intra-genepool selective mating in each resulted in high-yielding population, particularly in population where the number of primary branches, plant biomass and single-plant yield were considered for improvement. The study stressed the importance of method of (A) selection of genotypes and (B) selective mating within population in bringing about an overall improvement of seed yield in brown-seeded turnip-rape

Green Cellular Network Deployment To Reduce RF Pollution

As the mobile telecommunication systems are growing tremendously all over the world, the numbers of handheld and base stations are also rapidly growing and it became very popular to see these base stations distributed everywhere in the neighborhood and on roof tops which has caused a considerable amount of panic to the public in Palestine concerning wither the radiated electromagnetic fields from these base stations may cause any health effect or hazard. Recently UP High Court in India ordered for removal of BTS towers from residential area, it has created panic among cellular communication network designers too. Green cellular networks could be a solution for the above problem. This paper deals with green cellular networks with the help of multi-layer overlaid hierarchical structure (macro / micro / pico / femto cells). Macrocell for area coverage, micro for pedestrian and a slow moving traffic while pico for indoor use and femto for individual high capacity users. This could be the answer of the problem of energy conservation and enhancement of spectral density also.Comment: 6 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:1204.2101, arXiv:1110.2627, and with arXiv:0803.0952 and arXiv:0803.0952 by other author

Design optimization of Pixel Structure for α-Si based uncooled Infrared detector

In this paper authors present the design and simulation results achieved for pixel structure of amorphous Si (α-Si) based bolometer array. Most uncooled IR detectors in the world are based on VOx material. But this is not a standard material in IC technology and has many inherent disadvantages. The α-Si, an alternative material with high TCR is becoming as popular. However, large TCR values, in this material are achieved only in films of high resistivity. To achieve TCR value more than 2.5%/K, α-Si film resistivity is ~ 80 ohms-cm. This gives rise to very large pixel resistance of the order of 100 Mega ohms depending upon the design of the leg structure. This high pixel resistance causes very large noise and hence lower sensitivity. If leg width or membrane thickness is increased in order to reduce the pixel resistance, then this results in higher thermal conductance which also decreases sensitivity. To overcome this problem, pixel structure is so designed that within a pixel, only part of the electrical conduction is through α-Si and rest is through metal. Simulation using Coventorware software has been done to optimize pixel resistance as well as thermal conductance through legs so that maximum sensitivity could be obtained. Optimization is also carried out in order to reduce sensitivity of pixel resistance to variation in material resistivity.Defence Science Journal, 2013, 63(6), pp.581-588, DOI:http://dx.doi.org/10.14429/dsj.63.575

Current status and future prospects of rapeseed breeding in India

Basic results of applied value were obtained from studies on crosses between self-compatible and incompatible varieties of brown sarson, inter-varietal crosses among brown sarson, yellow sarson and toria, well defined single and three-way crosses and 'multiple cross-multiple pollen' hybrids. Some of the complex hybrids have been advanced to F2 and studies were conducted to test the efficiency of intra-population selective hybridization emphasizing choice of female parents in improving the yield of the populations. It was reported that these basic results are not utilized in the breeding programmes currently in vogue in India. It was pointed out that one of the short-term strategies to tone up the yield level of rapeseed in India is to advocate breeding of composite populations using the methods suggested by basic research. The future of rapeseed can be safeguard by propagating composite populations, advocating the concept of replacement in lieu of regeneration of composites when their yield levels deteriorate and strengthening the breeder-seed-producer-farmer link. Well-defined policies allotting the right priority to rapeseed breeding and advocating mono-and mixed cropping in appropriate areas are the need of the hour to ameliorate the low yield levels of rapeseed