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Saturday, July 06, 2019

NUTSVOLTS.COM (FEB 2019): WAITING FOR 5G WIRELESS

NUTSVOLTS.COM (FEB 2019): WAITING FOR 5G WIRELESS


WHAT PART OF THE RADIO SPECTRUM DOES 5G USE?
"...5G will use a wide range of spectrum.
  • Standard cellular bands below 6 GHz, plus 2.5, 3.5, 3.7-4.2, 4.9, 5.9 GHz.
  • 24 GHz and 26 GHz.
  • 27.5 to 28.35 GHz.
  • 37, 39, 42, and 47 GHz.  " 

CNET (July 8, 2018):  New report highlights 5G's early improvements over 4G

Saturday, March 02, 2019

IRSN: Understanding the accident of Fukushima Daiichi

[Video] IRSN: Understanding the accident of Fukushima Daiichi
  • One of the comments: "The best part of this story is that all of the older people in Japan stepped up to work on cleanup so the younger people would not have to suffer . Cancer from radiation poisoning takes many years to kill you and they figured they were already old so why not save the young from this fate . Faith in humanity still stands tall !"
  • Fukushima nuclear accident: 11 March 2011

Wednesday, November 21, 2018

Sunday, November 18, 2018

All Things Nuclear (Sep 27, 2018): Nuclear Reactor Fuel Safety: The Waiting Gain

All Things Nuclear (Sep 27, 2018): Nuclear Reactor Fuel Safety: The Waiting Gain

  • Báo Trẻ (Nov 17, 2018): Nhà máy nguyên tử San Onofre ["...Một bản tin của hệ thống truyền hình Russia Today cho biết: Hàng trăm tấn chất thải của nhà máy năng lượng nguyên tử San Onofret tại California được chôn ở nơi thiếu an toàn, tiềm ẩn nguy cơ nguy hiểm."]

Wednesday, November 07, 2018

Friday, October 05, 2018

ARS Technica (Oct 04, 2018): Company that sucks CO2 from air announces a new methane-producing plant

ARS Technica (Oct 04, 2018): Company that sucks CO2 from air announces a new methane-producing plant

  • "The plant consists of three air collectors that are more energy-efficient than Climeworks' first ambient air collector. "The plant will filter up to 150 tons of CO2 from ambient air per year," Climeworks said in a press statement. "Simultaneously, an alkaline electrolyser (1.2 MW) locally generates 240 cubic meters of renewable hydrogen per hour by making use of excess on-site photovoltaic energy." A catalyst then combines the CO2 and the hydrogen into methane gas in a reactor built by a French company called Atmostat. The methane "is then liquified and used to fuel natural gas lorries," Climeworks says."

Wednesday, October 03, 2018

Asia Sentinel (Oct 1, 2018): China Dams the World

Asia Sentinel (Oct 1, 2018): China Dams the World

  • " With virtually all of China’s rivers dammed numerous times and little work left to do in China itself, these companies seem to have a mandate to spread out across the world and dam every wild river that remains. It’s disturbing to think that the corporate executives of Chinese hydroelectric companies—with the likely backing of Beijing—pore over maps of the great rivers of the world, and then set in motion plans to contact governments, grease palms if necessary, and then set about destroying the planet’s wild rivers—and always in the name of “progress” and “development,” as if a dam alone ever lifted a country out of poverty. "

Wednesday, September 12, 2018

3ders.org (Sept 12, 2018): Volkswagen plan to use 3D metal printing for mass production

3ders.org (Sept 12, 2018): Volkswagen plan to use 3D metal printing for mass production


  • [Hewlett Packard (HP) said its new metal printing service won't be limited to car parts. " The implications are huge — the auto, industrial, and medical sectors alone produce billions of metal parts each year," HP CEO Dion Weisler said in a statement.]

Monday, September 03, 2018

The Economic Times (March 5, 2018): View: China's big data advantage isn't enough

The Economic Times (March 5, 2018): View: China's big data advantage isn't enough
  • " Data is the lifeblood of the digital world. But learning how to use it requires human talent, insight and creativity. In that race, China's tech giants still have a ways to go."
  • MIT Technology Review  (August 22, 2018): China’s use of big data might actually make it less Big Brother-ish ["Yet as social interactions have evolved in China, so have Chinese values. The rise of big-data technology in China has contributed to a far more acute awareness of privacy than other—momentous—socioeconomic developments such as GDP growth, globalization, and urbanization."]

Friday, August 31, 2018

Trẻ (Aug 20, 2018): Thế trận từ không gian

Trẻ (Aug 20, 2018): Thế trận từ không gian

  • [Năm ngoái, Diệp Bồi Kiến (Ye Peijian), nhân vật số một của chương trình thám hiểm mặt trăng của Trung Quốc, đã ngang nhiên đưa ra một so sánh khi trả lời phỏng vấn tại một cuộc họp thường niên của Ðảng Cộng Sản Trung Quốc cho thấy dã tâm của họ: “Vũ trụ giống như là biển vậy, mặt trăng là đảo Ðiếu Ngư, hoả tinh là đảo Hoàng Nham. Nếu chúng ta không chịu tới đó mặc dù có dư khả năng để làm việc này, thì chính chúng ta sẽ bị thế hệ hậu bối trách cứ. Nếu những nước khác tới đó trước rồi họ chiếm cứ, và ta sẽ không thể nào tới đó sau dù có muốn hay không. Ðiều này đã nói lên đủ lý do rồi.”]