P5091694

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  1. DannyDic より:

    How Nigeria’s biggest city became the world’s hottest winter party destination
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    It’s a world of endless parties and sleepless nights. A relentless celebration that turns West Africa – and especially Nigeria’s largest city, Lagos – into one of the hottest destinations on the continent, if not the planet, right in the middle of winter.

    Detty December is a magical time between December and early January when diaspora communities and tourists flock to Ghana, Nigeria and South Africa for an unforgettable experience filled with flavourful food, soulful African music and sunshine.

    Beach parties, festivals and top-tier performances fuel the energy, while fashion takes center stage, with everyone dressing to impress.

    Nearly two-thirds of Nigeria’s population is under 25, according to the United Nations Population Fund, making this one of the world’s youngest countries.

    Internationally renowned Afrobeats performers and foreign artists make surprise appearances. DJs take to the streets, blasting powerful beats from consoles mounted atop bright yellow minibuses.

    At times it’s all-consuming. Good luck getting hair salon appointments, affordable air tickets or navigating Lagos’ already notorious traffic when the party crowds are in town.

    Detty December (“detty” is a playful corruption of “dirty”) is a triumphant celebration of culture, music and good vibes that has evolved in recent years during the traditional holidays influx of diaspora returnees, which heightened in 2018 when Ghana ran a launched a successful “Year of Return” campaign actively encouraging people to visit their ancestral homelands.

    It’s gathered pace over the past five years, gaining an international reputation, as IJGBs (“I Just Got Backs”) and their friends arrive in batches, eager to unwind and blow off steam after the fast-paced, hard-working year they’ve had overseas.

    For many in the vast Nigerian diaspora, it is a deeply personal homecoming, a chance to reconnect with their heritage, traditions and families while immersing themselves in the lively energy of Nigerian life.

  2. Jeremytib より:

    What’s on board this flight
    Blue Origin had planned to launch a pair of Mars-bound satellites on behalf of NASA for the first flight of New Glenn.

    But delays with the rocket’s development prompted the space agency to change course, moving that flight to this spring at the earliest. So for this inaugural flight, Blue Origin opted to instead fly a “demonstrator” that will test technology needed for the company’s proposed Blue Ring spacecraft — which will aim to serve as a sort of in-space rideshare vehicle, dragging satellites deeper into space when needed.
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    The demonstrator on this New Glenn flight will remain aboard the rocket for the entire six-hour flight, Blue Origin said, and it will validate “communications capabilities from orbit to ground” as well as “test its in-space telemetry, tracking and command hardware, and ground-based radiometric tracking.”

    The Blue Ring Pathfinder demonstrator is part of a deal Blue Origin inked with the US Department of Defense’s Defense Innovation Unit.
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    Why Blue Origin wants to reuse rockets
    Similar to SpaceX, Blue Origin is aiming to recover and refly its first-stage rocket boosters in a bid to make launches less expensive.

    “Reusability is integral to radically reducing cost-per-launch,” the company said in a recent news release, using the same oft-repeated sentiment that SpaceX has touted since it began landing rocket boosters in 2015.
    Bezos, however, has acknowledged the importance of reusing rocket parts since he founded the company in 2000 — two years before Musk established SpaceX. And the company has already developed its suborbital New Shepard tourism rocket to be reusable.
    “It’s not a copy cat game,” Henry said. “Blue Origin has been pursuing reusable vehicles since before reusable vehicles were cool. Now it’s much more of a mainstream idea (because of SpaceX). The difference is that it’s taken Blue Origin so much longer to get to orbit.”

    If successful, returning the New Glenn rocket booster for a safe landing will be a stunning feat. After expending most of its fuel to propel the rocket’s upper stage to space, the first-stage booster will need to make a clean separation. The booster must then maneuver with pinpoint guidance and reignite its engines with precision timing to avoid crashing into the ocean or the Jacklyn recovery platform.

  3. Harryraw より:

    Most plane crashes are ‘survivable’
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    First, the good news. “The vast majority of aircraft accidents are survivable, and the majority of people in accidents survive,” says Galea. Since 1988, aircraft — and the seats inside them — must be built to withstand an impact of up to 16G, or g-force up to 16 times the force of gravity. That means, he says, that in most incidents, “it’s possible to survive the trauma of the impact of the crash.”

    For instance, he classes the initial Jeju Air incident as survivable — an assumed bird strike, engine loss and belly landing on the runway, without functioning landing gear. “Had it not smashed into the concrete reinforced obstacle at the end of the runway, it’s quite possible the majority, if not everyone, could have survived,” he says.

    The Azerbaijan Airlines crash, on the other hand, he classes as a non-survivable accident, and calls it a “miracle” that anyone made it out alive.
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    Most aircraft involved in accidents, however, are not — as suspicion is growing over the Azerbaijan crash — shot out of the sky.

    And with modern planes built to withstand impacts and slow the spread of fire, Galea puts the chances of surviving a “survivable” accident at at least 90%.

    Instead, he says, what makes the difference between life and death in most modern accidents is how fast passengers can evacuate.

    Aircraft today must show that they can be evacuated in 90 seconds in order to gain certification. But a theoretical evacuation — practiced with volunteers at the manufacturers’ premises — is very different from the reality of a panicked public onboard a jet that has just crash-landed.
    Galea, an evacuation expert, has conducted research for the UK’s Civil Aviation Authority (CAA) looking at the most “survivable” seats on a plane. His landmark research, conducted over several years in the early 2000s, looked at how passengers and crew behaved during a post-crash evacuation, rather than looking at the crashes themselves. By compiling data from 1,917 passengers and 155 crew involved in 105 accidents from 1977 to 1999, his team created a database of human behavior around plane crashes.

    His analysis of which exits passengers actually used “shattered many myths about aircraft evacuation,” he says. “Prior to my study, it was believed that passengers tend to use their boarding exit because it was the most familiar, and that passengers tend to go forward. My analysis of the data demonstrated that none of these myths were supported by the evidence.”

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