Solid State Lighting: A Summarization of Advancements

Solid State Lighting is a rapidly growing new technology in the field of lighting. By utilizing the concepts of solid-state physics and electronics, it generates light. Light emitting diodes and organic light emitting diodes pose several advantages over the current lighting technology but they still require development and research for using them to their full potential. In this paper the characteristics, sources of uncertainty, and market status of light emitting diode are reviewed to provide more suitable research directions for advancement in the field of solid-state lighting. Challenges faced by Light emitting diodes for maintaining color and visual comfort are also illustrated. Failure modes and environmental impact of light emitting diodes are also analysed. Quantum dot based solid state lightening is also presented to study the chromatic characteristics.  Some critical factors of concern for broader application of light emitting diodes and additional enhancements in electrical, optical, temperature characteristic, high power output and color furnishing capabilities are also demonstrated in paper. Light emitting diodes wattage output and efficiency are also discussed for practical viability of solid state devices in emerging fields. The extension lead of current LED technology in evolving applications are considered as accumulation of numerous technologies such as wireless, communication, sensors and control engineering. Undoubtedly, LED engineering is contemporary and the price maybe unreasonable. Nevertheless, it will find its usage in very nearly all applications and the initiation of new techniques that might lessen the cost

Seismic Response of Y-Shape Multi-Storey Building with Optimum Location of Shear Walls

Shear walls have extremely high in-plane strength and stiffness and also can counter heavy lateral loads making them quite advantageous in high-rise buildings. It is suggested to incorporate them in structures built in the places where there are chances of large intensity earthquakes or high winds. Positioning of the shear wall plays a very critical task in an asymmetric and irregular building subjected to earthquake forces. In our study, the main aim is to locate the advantageous position of the shear wall in Y-shaped asymmetric and irregular G+14 building in zone IV. The study is done by using a software package, CSI ETABS ver. 18.0.2. We have carried out Response Spectrum Analysis and Time History Analysis for this study. In this study, fourteen test models with unique location of shear wall are considered and parameters such as Time Period, Storey Displacement, Static Eccentricity, Storey Drift, Joint Displacement, Base Shear, and Base Force, are compared with the bare model. Thus, the best location of shear wall is suggested based on models having least static eccentricity, minimum displacement, Minimum drift, Minimum time period, Minimum joint displacement and Maximum base shear

Seismic Response of Y-Shape Multi-Storey Building with Optimum Location of Shear Walls

615-621Shear walls have extremely high in-plane strength and stiffness and also can counter heavy lateral loads making them quite advantageous in high-rise buildings. It is suggested to incorporate them in structures built in the places where there are chances of large intensity earthquakes or high winds. Positioning of the shear wall plays a very critical task in an asymmetric and irregular building subjected to earthquake forces. In our study, the main aim is to locate the advantageous position of the shear wall in Y-shaped asymmetric and irregular G+14 building in zone IV. The study is done by using a software package, CSI ETABS ver. 18.0.2. We have carried out Response Spectrum Analysis and Time History Analysis for this study. In this study, fourteen test models with unique location of shear wall are considered and parameters such as Time Period, Storey Displacement, Static Eccentricity, Storey Drift, Joint Displacement, Base Shear, and Base Force, are compared with the bare model. Thus, the best location of shear wall is suggested based on models having least static eccentricity, minimum displacement, Minimum drift, Minimum time period, Minimum joint displacement and Maximum base shear

Not Available

Not AvailableThe current study was carried out to determine combining ability and association of yield and yield components in 7 × 7 half-diallel crosses of ridge gourd (Luffa acutangula Roxb.) at ICAR-IARI, New Delhi in the year 2016. Twenty one F1 hybrids along with seven parental lines were grown in randomized block design in three replications. The mean square due to GCA and SCA were highly significant for all the characters indicating the importance of additive and non-additive genetic components for the traits under study. Further, SCA variance was more than GCA variance for all the characters which suggested the importance of non-additive variance for the improvement of these characters. The parental lines Pusa Nutan, DRG-7, DRG-71 and Pusa Nasdar were good combiners for most characters under study including yield and mineral nutrients. The hybrid combination of Pusa Nutan × Arka Sujat, Pusa Nasdar × Co-1 and Pusa Nasdar × Swarna Uphar were found to be most promising combinations for earliness, yield, mineral content and other economic traits of interest. Significant positive correlations were observed between yield and fruit length, average fruit weight and number of fruits per plant. The results indicated the importance of heterosis breeding for effective utilization of non-additive genetic variance in ridge gourd.Not Availabl

Not Available

Not AvailableThe current study was carried out to determine combining ability and association of yield and yield components in 7 × 7 half-diallel crosses of ridge gourd (Luffa acutangula Roxb.) at ICAR-IARI, New Delhi in the year 2016. Twenty one F1 hybrids along with seven parental lines were grown in randomized block design in three replications. The mean square due to GCA and SCA were highly significant for all the characters indicating the importance of additive and non-additive genetic components for the traits under study. Further, SCA variance was more than GCA variance for all the characters which suggested the importance of non-additive variance for the improvement of these characters. The parental lines Pusa Nutan, DRG-7, DRG-71 and Pusa Nasdar were good combiners for most characters under study including yield and mineral nutrients. The hybrid combination of Pusa Nutan × Arka Sujat, Pusa Nasdar × Co-1 and Pusa Nasdar × Swarna Uphar were found to be most promising combinations for earliness, yield, mineral content and other economic traits of interest. Significant positive correlations were observed between yield and fruit length, average fruit weight and number of fruits per plant. The results indicated the importance of heterosis breeding for effective utilization of non-additive genetic variance in ridge gourd.Not Availabl