วันพุธที่ 3 ธันวาคม พ.ศ. 2551

Amateur radio in India



Amateur radio in India is practised by more than 16,000 licensed users. The first amateur radio operator was licensed in 1921, and by the mid-1930s, there were around 20 amateur radio operators in India. Amateur radio operators have played an important part in the Indian independence movement with the establishment of pro-independence radio stations in the 1940s, which were illegal. The three decades after India's independence saw only slow growth in the numbers of operators until the then Prime Minister of India, and ham operator Rajiv Gandhi waived the import duty on wireless equipment in 1984. Since then, numbers have picked up, and as of 2007[update], there were more than 16,000 operators in the country. Amateur radio operators have played a vital role during disasters and national emergencies such as earthquakes, tsunamis, cyclones, floods, and bomb blasts, by providing voluntary emergency communications in the affected areas. The Wireless and Planning and Coordination Wing (WPC)—a division of the Ministry of Communications and Information Technology—regulates amateur radio in India. The WPC assigns call signs, issues amateur radio licences, conducts exams, allots frequency spectrum, and monitors the radio waves. In India, the Amateur Radio Society of India (ARSI) represents amateur radio interests at various forums, and represents India at the International Amateur Radio Union.

วันอังคารที่ 2 ธันวาคม พ.ศ. 2551

St Kilda



St Kilda is an isolated archipelago 64 kilometres (40 mi) west-northwest of North Uist in the North Atlantic Ocean. It contains the westernmost islands of the Outer Hebrides of Scotland. The largest island is Hirta, whose sea cliffs are the highest in the United Kingdom. The Gaelic-speaking population probably never exceeded 180 and was never more than 100 after 1851. Although St Kilda was permanently inhabited for at least two millennia, and despite the inhabitants' unique way of life, the entire population was evacuated in 1930. The only residents are now military personnel. The islands are administratively a part of the Comhairle nan Eilean Siar local authority area. The islands' human heritage includes numerous unique architectural features from the historic and prehistoric periods, although the earliest written records of island life date from the Late Middle Ages. The medieval village on Hirta was rebuilt in the 19th century, but the influences of religion, tourism and the First World War contributed to the island's evacuation in 1930. The story of St Kilda has attracted artistic interpretations, including a recent opera. The entire archipelago is owned by the National Trust for Scotland. It became one of Scotland's four World Heritage Sites in 1986 and is one of the few in the world to hold joint status for its natural, marine and cultural qualities.