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    Articles

    S. Korean researchers develop method of powering trains wirelessly

    December 10, 2019


    South Korean researchers have recently
    developed a way to run train so more or less electricity now this method would
    use only 30% of the energy trains need currently and could be applied to
    Korea’s high-speed trains as soon as in 2022 our joseon reports wireless
    charging technology has changed the way we use our electronic gadgets now it’s
    found its way into transportation thanks to researchers at the Korea railroad
    Research Institute who succeeded in applying the technology to trains the
    developers have built wire free electromagnetic rails and trains that
    run on them have devices that automatically collect and harness the
    energy the devices use batteries that deliver the electricity needed to propel
    the train forward and they store any power left over using this method the
    developers were able to operate the Train at a maximum speed of 50
    kilometers per hour plus it only uses 30 percent of the energy needed by existing
    trains the train takes energy from the rails when leaving a station saving its
    battery power in those intervals so there’s no power leakages when the train
    stops the power doesn’t run out even though it makes the whole trip it also
    costs less to install the technology since it doesn’t need wires or other
    infrastructure developers say if applied to Subway’s it could reduce tunnel costs
    by 5% we could drastically cut down the cost of building tunnels for the subway
    since we wouldn’t need any wires this technology will take the railroad
    business to another level researchers will continue polishing the technology
    before applying it to high-speed trains including the KTX starting in 2022 total
    mean Arirang news

    The Longest Underwater Tunnel | China’s Future MEGAPROJECTS: Part 5
    Articles, Blog

    The Longest Underwater Tunnel | China’s Future MEGAPROJECTS: Part 5

    December 7, 2019


    Now for the most dangerous project on the
    agenda. The world’s longest underwater tunnel will connect the cities of Dalian and Yantai
    across the Bohai Sea, passing through two deadly earthquake fault zones. At 76 miles
    long it will be longer than the current first and second-ranked underwater tunnels combined,
    and at a cost of $42 billion, it will be extremely expensive. But the Chinese calculate that
    it will be worth it. For one, it will slash the eight hour drive
    between the two cities to under two hours. It will also connect China’s isolated northern
    rustbelt with its wealthy east coast, adding an additional $3.7 billion to the economy
    each year. The experience could also establish the Chinese
    as the preeminent submarine diggers in the world, and would be a serious practice run
    for far more ambitious potential future Mega-MEGA-projects like connecting China to South Korea, or even
    Russia to the United States across the Bering Strait–yes, that has actually been proposed. This isn’t the first underwater tunnel project
    for Chinese engineers, either, who already gained some experience by completing the 3.8
    mile-long Jiaozhou Bay Tunnel in 2011. But while the Bohai Sea is roughly the same depth
    as Jiaozhou Bay, the tunnel underneath it will be 20 times longer. When it comes to construction, if they’re
    lucky, the Chinese will encounter only soft seabed, allowing them to use Tunnel-Boring
    Machines the whole way. But if they run into harder rock, they’re going to have to use
    the “drill-and-blast” method embraced by the Japanese during construction of the
    Seikhan Tunnel. Using tons of dynamite hundreds of feet underwater is dangerous business,
    and it resulted in the unfortunate deaths of four workers over the course of that project,
    and maaaany accidental leaks. Reporter: “In 1976 the project hit its biggest
    crisis when 80 tons of seawater a minute began leaking in. 1.5 km of tunnel flooded. It took
    five months to get back on track.” Bryce: The Bohai Tunnel will also have to
    withstand magnitude 8.0 earthquakes. In 1976, the deadliest earthquake in modern history
    — a 7.8 — killed a record 650,000 people in Tangshan and surrounding areas. In 1969
    a quake measuring 7.4 on the Richter scale shook the Bohai Bay itself. And there doesn’t
    seem to be much the engineers can even do about that threat besides simply reinforcing
    the strength of the tunnel walls. Of course, they could simply not bore a long hole under
    a deep bay through two fault zones, but that doesn’t really seem to be an option at this
    point. Because officials throughout China are under
    enormous pressure to hit GDP economic growth targets, and there aren’t many other options
    that could provide anywhere near as much economic benefit as the Bohai Tunnel, which should
    break ground sometime in 2016. For TDC, I’m Bryce Plank. Thanks for watching.

    Articles

    France paralyzed as thousands of workers launch general strike against pension reforms

    December 6, 2019


    thousands of workers in France took to
    the streets to protest against President Emmanuel macron
    proposed pension reforms the eiffel tower was shut down and most of the rail
    lines in Paris were disrupted on ji-yong tells us more Frances largest general strike in
    decades has shut down large parts of the country in the latest protests against
    president Emmanuel macron pension reform plans according to French police more
    than 800,000 workers nationwide launched a general strike on Thursday calling for
    macron to abandon the reforms there were even violent clashes between protesters
    and police in some cities more than 10 metro lines were closed in Paris and
    only 10% of trains operated as railway workers joined the walkout many schools
    were also closed and about 20% of all flights going into and out of Paris and
    other large cities have been canceled workers and friends are angry about a
    proposed pension reform which would see them get reduced payouts or have to
    retire later currently france’s pension plan has 42 separate systems with
    variations in retirement age and benefits the official retirement age is
    currently 62 but some special schemes allow certain public sector workers to
    retire as early as 50 however for the sake of equality France president
    Emmanuel macron wants to create a unified system where everyone’s pension
    would be calculated the same way he aims to implement a points-based system where
    the employees are awarded points for each day worked which would be
    transferred into future pension benefits today I demonstrate for the next
    generation because when you see that we have worked all our lives I have worked
    43 years I have a 1200 year pension I doubt that younger people will have a
    pension like we currently have if they want it they will have to work until
    they are 70 years old it is untenable the protesters claim they would be
    shortchanged as a proposed reforms would removes many of the pension benefits for
    certain jobs like lawyers and railway workers on ji-yong arirang news