Ecse

Soon after the south-west monsoon, mean surface meteorological parameters at the Kavaratti Island begin to change. Wind, which was south-west in direction during the monsoon period, turns to north-north and eventually to north-east direction with lesser intensity. Monthly mean wind speed in October was ~2 ms while in July it was~7 ms. Monthly mean surface air pressure in October was ~1008 hPa as against ~1007 hPa in July. Surface air-temperature and relative humidity also exhibited similar variability. Monthly mean air temperature and humidity in October were ~28C, and ~76% respectively, while in July ~26C, and ~87% respectively were recorded. In general, wind was predominantly in the north/north-westerly direction throughout the year, except June-July during which a west/south-westerly winds was observed. Minimum atmospheric pressure occurs during June-July (southwest monsoon period) and the maximum during December-January (northeast monsoon period). Air temperature demonstrates st...

In certain memory systems the most common error is a single error and the next most is double error type. Here we propose a methodology and implementation of CA (cellular automata) based error correcting codes (ECCs) those are widely applied in computer memory systems. These increase reliability and data integrity. In this paper, we have proposed a novel approach for designing four byte error detecting and correcting code, based on CA concept, and implemented in VHDL. The CA already accepted as an attractive structure for VLSI implementation because of its parallelism, modularity, high performance and reliability. In this correspondence, a modular architecture of CA based (32, 28) four byte error correcting encoder and decoder has been proposed. By using cellular automata (CA) based codes,we can perform four byte error detection and four byte error correction either in check byte or in information byte.