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- 28 years of Earth’s surface changes on Google
- International Day for Biological Diversity
- Gujarat pollution board gets a makeover in efficiency 33
- Health ministry sets timeframe for keeping animals treated with antibiotics out of food chain
- Li's visit yields little on Brahmaputra
- Chaos in the iron age 4
- Monsoon arrives over Andaman Sea
- In celebration of biodiversity 5
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- India bans use of dolphins for commercial entertainment
- Environment ministry wants to restore night traffic through Bandipur tiger reserve 52
- A green facade 44
- Diesel: when bad policy makes for toxic hell 38
- Gujarat pollution board gets a makeover in efficiency 33
- What’s good insulation? 30
- How vulnerable are India's nuclear power plants to disaster 28
- Grand distraction called river interlinking 28
- Eat at your own risk 27
- Green energy takes toll on green cover 26
- Temporary solution, permanent jam 25
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Science & Technology
For music freaks
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Issue Date: Dec 15, 1999
That voltage fluctuations and frequency variations spoil the fun of hi-fi digital sound systems is the complaint of many a music fan. PS Audio, a company based in Avon, Colorado, USA, has developed a device worth US $1,000 that delivers a pure waveform when plugged into the electricity mains. The device takes power from the mains and converts it from AC to DC and back again. The systems relies on a digital signal processor.
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Dear Saxena ji,
Thank you for inquiry.
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