Singapore Scientists Seek Power from Darkness through Shadow Energy

Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)
Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)
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Singapore Scientists Seek Power from Darkness through Shadow Energy

Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)
Dr. Swee Ching Tan holds a cardboard panel to cast a shadow over the shadow effect generator device next to an electrometer at a lab in the National University of Singapore June 26, 2020. (Reuters)

Scientists in Singapore are hoping to perfect a new method of power generation driven largely by shadows, with the hope that it could one day help highly urbanized cities power themselves.

The shadow-effect energy generator (SEG) being developed by the National University of Singapore has the potential to harness power like solar cells, but without needing open spaces with uninterrupted light.

To work effectively, the SEG requires both light and dark and, like solar panels, relies on light to shine on silicon to energize electrons.

However, using panels that feature a thin layer of either gold, silver, platinum or tungsten, the difference in light intensity drives electrons from lit areas towards the shade, creating electricity in the shaded areas.

“Our shadow effect generator comes in handy. It can be placed in those areas to harvest obstructed light,” said research team leader Dr. Swee Ching Tan.

The research is still in its early stages yet Tan’s team is already thinking about the potential of establishing a company to make SEG available for home use.

The panels the team have been testing are about 6 sq cm in size and capable of producing just 0.25 volts, meaning about 20 are needed to power a light bulb, or charge a cellphone.

The ideal environment for use would be cities, Tan said, with constantly shifting levels of light and shade throughout the day from clusters of tall buildings and the sun’s changing position in the sky.

“It’s not practical to place solar cells in such cities. So the device might come in handy in places like very densely populated cities, where skyscrapers are everywhere, where shadows are always persistent,” Tan said.



DeepSeek Available to Download Again in South Korea After Suspension 

The DeepSeek logo is seen on January 29, 2025. (Reuters)
The DeepSeek logo is seen on January 29, 2025. (Reuters)
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DeepSeek Available to Download Again in South Korea After Suspension 

The DeepSeek logo is seen on January 29, 2025. (Reuters)
The DeepSeek logo is seen on January 29, 2025. (Reuters)

Chinese artificial intelligence service DeepSeek became available again on South Korean app markets on Monday for the first time in about two months, when downloads were suspended after authorities cited breaches in data protection rules.

South Korea's Personal Information Protection Commission said on Thursday that DeepSeek transferred user data and prompts without permission when the service first launched in South Korea in January.

Downloading the app was suspended in February after the questions over personal data protection surfaced, but the service was available for download again on South Korea's app market including via Apple's App Store and Google Play Store.

"We process your personal information in compliance with the Personal Information Protection Act of Korea," DeepSeek said in a revised privacy policy note applied to the app.

DeepSeek said users had the option to refuse to allow the transfer of personal information to a number of companies in China and the United States.

DeepSeek did not immediately respond to a request for comment on Monday.

South Korea's data protection agency said DeepSeek had voluntarily decided to make the app available for download, which it is free to do after at least partially reflecting its recommendations.