Wednesday November 20, 2019
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U.S. Researchers Develop A Vacuum-Assisted Toilet for Flight Passengers

They added additional pipe to increase the distance between the toilet bowl and the flush valve and made the pipe attachment at the bowl more of a gradual bend as opposed to a sharp 90-degree angle. 

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The new vacuum-assisted technology can also be used for toilets on cruise ships, trains and even in new green building projects where people are looking at ways to reduce water usage. Pixabay

Airplane toilets are loud. For kids, they could be downright terrifying. Now, a team of US researchers has invented a vacuum-assisted toilet that is about half as loud as the regular airplane commode.

“People have told us they don’t want their kids to be scared to use the bathroom on a flight,” said lead researcher Kent Gee, Professor at the Brigham Young University. “We’ve used good physics to solve the problem.”

It’s been a really hard problem to solve because getting airplane toilets to flush with very little water requires a partial vacuum, which at 38,000 feet, pulls air at nearly half the speed of sound.

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Now that airplanes come with much quieter interiors, toilet flushes reverberate more throughout the cabin. Pixabay

According to the research, conducted in a lab, an air-water mix in vacuum-assisted toilets travels more than 300 miles per hour.

When things move at that speed, any disturbance at all to the flow — like the bend of a pipe or a valve — generates significant noise.

Now that airplanes come with much quieter interiors, toilet flushes reverberate more throughout the cabin.

However, tests of the new contraption show aeroacoustically-generated noise declined 16 decibels during the flush valve opening and about 5-10 decibels when the valve is fully opened, the researchers reported in the Proceedings of Meetings on Acoustics journal.

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When things move at that speed, any disturbance at all to the flow — like the bend of a pipe or a valve — generates significant noise. VOA

To solve the problem, the team focused on three valve conditions during the flush cycle: the initial noise level peak associated with the flush valve opening, an intermediate noise level plateau associated with the valve being fully opened and the final noise level peak associated with the flush valve closing.

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They added additional pipe to increase the distance between the toilet bowl and the flush valve and made the pipe attachment at the bowl more of a gradual bend as opposed to a sharp 90-degree angle.

The new vacuum-assisted technology can also be used for toilets on cruise ships, trains and even in new green building projects where people are looking at ways to reduce water usage. (IANS)

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Xiaomi Smartphones Sold in India are Made in The Country Itself

Xiaomi phones in India are manufactured mainly by Taiwanese giant Foxconn, also known as Hon Hai Precision Industry Co. Ltd

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Xiaomi said it has also started exporting phones made in India to Bangladesh and Nepal. Wikimedia Commons

Almost all of the phones that Chinese smartphone maker Xiaomi sells in India are made in the country, a top company executive said here on Monday, stressing that ‘make in India’ Xiaomi smartphones are now being exported to other countries too, though at a small scale.

“About 99 per cent of the phones sold in India are made in the country. We make three phones per second,” Muralikrishnan B, Chief Operating Officer, Xiaomi India, told reporters here.

Xiaomi phones in India are manufactured mainly by Taiwanese giant Foxconn, also known as Hon Hai Precision Industry Co. Ltd.

The manufacturing is being done at Xiaomi’s two facilities — one at the Sri City special economic zone in Andhra Pradesh and the other at Sriperumbudur in Tamil Nadu.

Xiaomi said it has also started exporting phones made in India to Bangladesh and Nepal.

“We have started exporting to these two countries at a small scale. With more government incentives, we plan to scale up the export of ‘make in India’ phones,” Muralikrishnan noted.

“We will have to see if we can manage the entire logistics. Ultimately, we will have to realise that cost efficiency also matters,” he added.

The COO of India’s biggest smartphone seller said that there are various issues hindering export of its ‘make in India’ products to other countries including certification issues and low rate of duty drawbacks.

“BIS certification is not accepted in many parts of the world. If the government can make BIS certification accepted in countries in Europe, it would help us scale,” he said, adding that India has a lot to learn from Vietnam in terms of incentivising domestic manufacturing.

Xiaomi
Almost all of the phones that Chinese smartphone maker Xiaomi sells in India are made in the country, a top company executive said here on Monday, stressing that ‘make in India’ Xiaomi smartphones are now being exported to other countries too, though at a small scale. Pixabay

About 65 per cent of Xiaomi phone components are also sourced from within the country.

“In terms of manufacturing, the progress that India has made in the past 5 years is phenomenal,” said Foxconn India Country Manager Josh Foulger.

Besides initiatives under ‘Make in India’, the corporate tax relief and improvement in ease of doing business have helped a lot, he added.

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Significantly, all the operators at Foxconn’s Sri City facility for Xiaomi are women. The facility employs over 15,000 people. (IANS)