Seismic imaging of glaciomarine sediments of Antarctica: optimizing the acquistion parameters

412-418This paper presents some of the significant points on the designing and acquisition parameters for multi-channel seismic reflection survey in the Antarctic waters with an emphasis of imaging Glaciomarine sediments. Due to their importance in unravelling the paleoclimatic clues, we stress on the practical aspects of seismic data acquisition focussed on targeting glaciomarine sediments on the Antarctic margin. We carried out extensive forward modelling exercise assuming sub-surface model parameters from the published literature pertaining to the Eastern Antarctic Margin (EAM). The reason for choosing this area is that the Prydz Bay sector of EAM has been known to have undergone huge glacial sediment accumulation in the past due to its contiguity with the Amery Ice Shelf. In this article we suggest the best suited acquisition parameters for collecting high quality multi-channel seismic data in order to image the Glaciomarine sediments in this region

Effect of Firing Conditions & Release Height on Terminal Performance of Submunitions and Conditions for Optimum Height of Release

Submunitions should exhibit optimum terminal performance at target end when released from certain pre-determined height. Selection of an optimum height of release of the submunitions depends on the terminal parameters like forward throw, remaining velocity, impact angle and flight time. In this paper, the effects of initial firing conditions and height of release on terminal performance of submunitions discussed in detail. For different height of release, the relation between range and forward throw is also established & validated for a number of firing altitude and rocket configurations

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Not AvailableThis study reports income enhancement of rural women by their capacity building in Malihabad tehsil of Uttar Pradesh. The study is based on 60 farm women selected from small, marginal and landless households who were provided training for production of improved quality of dried mango slices, commonly known as khatai. The intervention included use of mango peeler, solar dehydrator, preservative and marketing of produce through an NGO. This led to enhancement of income to the tune of 51.0 per cent in small, 50.6 per cent in marginal and 47.6 per cent in landless farm families. The use of mango peeler enhanced slice recovery by 4.5 per cent and reduced time in peeling mango by 26.5 per cent over the traditional method. The use of solar dehydrator enhanced temperature by 8–10 ºC over ambient temperature which helped in fast and uniform drying of slices. The mango slices produced through improved method contains lower were of superior quality with moisture-content (8.4%) and non-enzymatic browning (0.4) and high titrable acidity (21.3%) and total phenol (0.2 g/100g) as compared to the traditional produce.Not Availabl

Dispersion sensitivity analysis & consistency improvement of APFSDS

The purpose of this study is to investigate and quantify some possible sources of dispersion of 120 mm APFSDS tank ammunition both experimentally and numerically. This paper aims to point out the most influential source during In-Bore Balloting Motion phase as well as in External Ballistics phase of the ammunition and quantifies its effect on dispersion. Data obtained from flight trials is critically analysed and parameters affecting dispersion such as initial yaw/pitch rates, yaw/pitch dampening, plane start angle, launch spin, clearance, centre of gravity shift, dynamic imbalance angle, cross wind, etc. are observed and, later on, studied in detail by extensive External Ballistics Monte Carlo (EBMC) simulation and Six Degree of Freedom (6-DOF) trajectory analysis. In Bore Balloting Motion simulation shows that reduction in residual spin by about 5% results in drastic 56% reduction in first maximum yaw. A correlation between first maximum yaw and residual spin is observed. Results of data analysis are used in design modification for existing ammunition. Number of designs are evaluated numerically before freezing five designs for further soundings. These designs are critically assessed in terms of their comparative performance during In-bore travel & external ballistics phase. Results are validated by free flight trials for the finalised design

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