投稿時間:2023-04-24 00:13:13 RSSフィード2023-04-24 00:00 分まとめ(13件)

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TECH	Techable（テッカブル）	マイナビ、大学生向けの無料オンラインキャリア学習サイト「My CareerStudy」提供	https://techable.jp/archives/203635	mycareerstudy	2023-04-23 14:00:20
js	JavaScriptタグが付けられた新着投稿 - Qiita	JavaScriptにおけるオブジェクト指向の特徴について	https://qiita.com/arihori13/items/27b93050aac069600f3a	javasc	2023-04-23 23:23:28
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Ruby でブラックジャックゲーム作ってみた[リファクタリング中]	https://qiita.com/n_69/items/dda72ec92ac8c7a5d7ce	作ってみた	2023-04-23 23:48:18
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Rubyのアクセス修飾子	https://qiita.com/sotanaka/items/4271007753146ed871fc	qiita	2023-04-23 23:47:48
Linux	Ubuntuタグが付けられた新着投稿 - Qiita	Xubuntu 23.04 Minimal のインストールメディアで「452: out of range pointer: 0x100010」と表示され起動しない問題への対応	https://qiita.com/Mitz-TADA/items/d01afa61af808db8ad8d	cpuatomn	2023-04-23 23:24:39
技術ブログ	Developers.IO	S3 へユーザー認証付きでファイルをアップロードする Amplify のサンプルアプリを試してみた	https://dev.classmethod.jp/articles/upload-files-to-s3-with-user-authentication/	amplify	2023-04-23 14:53:30
海外TECH	MakeUseOf	How to Fix Windows Security’s “Unexpected Error” in Windows 10 & 11	https://www.makeuseof.com/windows-security-unexpected-error/	error	2023-04-23 14:15:15
Apple	AppleInsider - Frontpage News	When Apple's headset launches, it will do more than Oculus does	https://appleinsider.com/articles/23/04/23/when-apples-headset-launches-it-will-do-more-than-oculus-does?utm_medium=rss	When Apple x s headset launches it will do more than Oculus doesApple will be including many different features in its inbound mixed reality headset with it expected to offer many elements in its first incarnation that other headsets don t provide AppleInsider render of the forthcoming Apple VR headsetThe Apple VR and AR headset is expected to land at WWDC in June and become the center of attention While speculation has largely centered around its hardware capabilities it seems that its list of features and functions could be just as expansive Read more	2023-04-23 14:43:08
Apple	AppleInsider - Frontpage News	Apple's MR headset to use magnetically-attached tethered battery	https://appleinsider.com/articles/23/04/23/apples-mr-headset-to-use-magnetically-attached-tethered-battery?utm_medium=rss	Apple x s MR headset to use magnetically attached tethered batteryApple s mixed reality headset will feature a magnetic port for attaching a battery pack to the device it is claimed but it will just offer two hours of battery life A render of a potential Apple headset AppleInsider The often rumored AR and VR headset is still set to make a splash at the upcoming WWDC keynote but it seems Apple is still sticking to the idea of a tethered battery pack In new details in a Sunday leak it appears Apple is taking a fairly unique route with the concept Read more	2023-04-23 14:12:24
Apple	AppleInsider - Frontpage News	Harber London MacBook Sleeve Review: Handcrafted and pricey protection	https://appleinsider.com/articles/23/04/23/harber-london-macbook-sleeve-review-handcrafted-and-pricey-protection?utm_medium=rss	Harber London MacBook Sleeve Review Handcrafted and pricey protectionThe Harber London Zippered Sleeve is a secure and comfortable MacBook sleeve for those with a taste for handcrafted goods Founded in Harber London was inspired to address the difficulty of finding quality laptop sleeves They have found their niche in using full grain leather and handcrafting their many products making bags and wallets and specializing in accessories for the Apple ecosystem The zippered sleeve is a pleasant return to their original idea Coming in Mocha Black and Olive the sleeve has nine different size options fitting inch to inch MacBooks across many generations Read more	2023-04-23 14:00:38
海外TECH	Engadget	Hitting the Books: We'd likely have to liquidate Jupiter to build a Dyson Sphere around the Sun	https://www.engadget.com/hitting-the-books-the-possibility-of-life-jaime-greene-hanover-square-press-113047089.html?src=rss	Hitting the Books We x d likely have to liquidate Jupiter to build a Dyson Sphere around the SunThe gargantuan artificial construct enveloping your local star is going to be rather difficult to miss even from a few light years away And given the literally astronomical costs of resources needed to construct such a device ーthe still theoretical for humans Dyson Sphere ーhaving one in your solar system will also serve as a stark warning of your technological capacity to ETs that comes sniffing around nbsp Or at least that s how th century astronomers like Nikolai Kardashev and Carl Sagan envisioned our potential Sol spanning distant future going Turns out a whole lot of how we predict intelligences from outside our planet will behave is heavily influenced by humanity s own cultural and historical biases In The Possibility of Life science journalist Jaime Green examines humanity s intriguing history of looking to the stars and finding ourselves reflected in them Harper Collins PublishingExcerpted from The Possibility of Life by Jaime Green Copyright by Jaime Green Published by Hanover Square Press On a Scale of One to ThreeThe way we imagine human progress ーtechnology advancement ーseems inextricable from human culture Superiority is marked by fast ships colonial spread or the acquisition of knowledge that fuels mastery of the physical world Even in Star Trek the post poverty post conflict Earth is rarely the setting Instead we spend our time on a ship speeding faster than light sometimes solving philosophical quandaries but often enough defeating foes The future is bigger faster stronger ーand in space Astronomer Nikolai Kardashev led the USSR s first SETI initiatives in the early s and he believed that the galaxy might be home to civilizations billions of years more advanced than ours Imagining these civilizations was part of the project of searching for them So in Kardashev came up with a system for classifying a civilization s level of technological advancement The Kardashev scale as it s called is pretty simple a Type I civilization makes use of all the energy available on or from its planet A Type II civilization uses all the energy from its star A Type III civilization harnesses the energy of its entire galaxy What s less simple is how a civilization gets to any of those milestones These leaps in case it s not clear are massive On Earth we re currently grappling with how dangerous it is to try to use all the energy sources on our planet especially those that burn So we re not even a Type I civilization more like a Type Three quarters A careful journey toward Type I would involve taking advantage of all the sunlight falling on a planet from its star but that s just one billionth or so of a star s total energy output A Type II civilization would be harnessing all of it It s not just that a Type II civilization would have to be massive enough to make use of all that energy they d also have to figure out how to capture it The most common imagining for this is called a Dyson sphere a massive shell or swarm of satellites surrounding the star to capture and convert all its energy If you wanted enough material to build such a thing you d essentially have to disassemble a planet and not just a small one ーmore like Jupiter And then a Type III civilization would be doing that too but for all the stars in its galaxy and maybe doing some fancy stuff to suck energy off the black hole at the galaxy s core On the one hand these imaginings are about as close to culturally agnostic as we can get they require no alien personalities no sociology just the consumption of progressively more power to be put to use however the aliens might like But the Kardashev scale still rests on assumptions that are baked into so many of our visions of advanced aliens and Earth s own future as well This view conflates advancement not only with technology but with growth with always needing more power and more space just the churning and churning of engines Astrophysicist Adam Frank identifies the Kardashev scale as a product of the midcentury “techno utopian vision of the future At the point when Kardashev was writing humanity hadn t yet been forced to face the sensitive feedback systems our energy consumption triggers “Planets stars and galaxies Frank writes “would all simply be brought to heel Even in the Western scientific tradition alternatives to Kardashev s scale have been offered Aerospace engineer Robert Zubrin proposed one scale that measures planetary mastery and another that measured colonizing spread Carl Sagan offered one that accounts for the information available to a civilization Cosmologist John D Barrow proposed microscopic manipulation going from Type I minus where people can manipulate objects of their own scale down through the parts of living things molecules atoms atomic nuclei subatomic particles to the very fabric of space and time Frank proposed looking not at energy consumption but transformation noting that a sophisticated civilization does more than bring a planet to heel it must learn to find balance between resource use and long term survival Of these ーagain all white American or European men ーonly Sagan offers a measure of advancement that isn t necessarily acquisitive Even the manipulation of atoms which may seem so small and delicate requires massive amounts of energy in the form of particle accelerators not to mention that this kind of tinkering has also unleashed humanity s greatest destructive force But Sagan s super advanced civilization could be nothing more than a massive massive library filled with scholars and philosophers expanding and exploring mentally but with no dominion over their planet or star Yet one has to ask What is powering those libraries The internet is ephemeral but it is not free Implicit in any vision of vast progress is not just longevity but continuity The assumption of the ever upward sloping line is bold to say the least In the novella A Man of the People Ursula K Le Guin writes of one world Hain where civilization has existed for three million years But just as the last few thousand years on Earth have seen empires rise and fall and cultures collapse and displace one another so it is on Hain at larger scale Le Guin writes “There had been…billions of lives lived in millions of countries…infinite wars and times of peace incessant discoveries and forgettings…an endless repetition of unceasing novelty To hope for more than that is perhaps more optimistic than to imagine we might domesticate a star Perhaps it s also shortsighted extrapolating out eons of future from just the last few centuries of life on two continents rather than a wider view of many millennia on our whole world All of these scales of progress are built on human assumptions specifically the colonizing dominating fossil fuel burning history of Europe and the United States But scientists don t see much use in thinking about the super advanced alien philosophers and artists and dolphins brilliant as they might be because it would be basically impossible for us to find them The scientific quest for advanced aliens is about trying to imagine not just who might be out there but how we might find them Which is how we end up at Dyson spheres Dyson spheres are named for Freeman Dyson the physicist mathematician and general polymath While most SETI scientists in the early s were looking for extraterrestrial beacons Dyson thought “one ought to be looking at the uncooperative society Not obstinate just not actively trying to help us “The idea of searching for radio signals was a fine idea he said in a interview “but it only works if you have some cooperation at the other end So I was always thinking about what to do if you were looking just for evidence of intelligent activities without anything in the nature of a message And you might as well start with the easiest technology to detect ーthe biggest or brightest So the massive spheres Dyson popularized in his paper were the result of him asking What is the largest feasible technology In the Star Trek The Next Generation episode “Relics the Enterprise finds itself caught in a massive gravitational field even though there are no stars nearby The source on the view screen is a matte dark gray sphere Riker says its diameter is almost as wide as the Earth s orbit Picard asks with hushed wonder “Mr Data could this be a Dyson sphere Data replies “The object does fit the parameters of Dyson s theory Commander Riker isn t familiar with the concept but Picard doesn t give him any trouble for that “It s a very old theory Number One I m not surprised that you haven t heard of it He tells him that a twentieth century physicist Freeman Dyson had proposed that a massive hollow sphere built around a star could capture all the star s radiating energy for use “A population living on the interior surface would have virtually inexhaustible sources of power Riker asks with some skepticism if Picard thinks there are people living in the sphere “Possibly a great number of people Commander Data says “The interior surface area of a sphere this size is the equivalent of more than two hundred and fifty million Class M Earthlike planets In Dyson s thinking the goal wasn t living space but energy ーhow would a civilization reach Type II And Dyson s writing was clearly speculative In the paper he wrote “I do not argue that this is what will happen in our system I only say that this is what may have happened in other systems Decades later astrophysicist Jason Wright took up the search One of the great benefits to this approach Wright told me is that “nature doesn t make Dyson spheres Wright is a professor of astronomy and astrophysics at Penn State where he is director of the Penn State Extraterrestrial Intelligence Center But while the best known version of SETI is listening for radio signals more on that in the next chapter Wright focuses on looking for technosignatures ーevidence of technology out among the stars Technosignatures allow you to find those uncooperative aliens Dyson thought would make the best targets We don t even need to find the aliens in this case just proof they once existed That could be a stargate or a distant planet covered in elemental silicon geologically unlikely but technologically great for solar panels or it could be a Dyson sphere Wright s first big search for Dyson spheres was called Glimpsing Heat from Alien Technologies or G HAT Or even better Gˆ because that s a G with a little hat on it The premise was simple Dyson spheres don t just absorb energy they transform it inevitably radiating some waste as heat which we can see as infrared radiation So from to Wright and his team looked at about a million galaxies searching for a Type II civilization on its way to Type III having ensconced enough of a galaxy s stars in Dyson spheres that the galaxy might glow unusually bright in infrared They surveyed galaxies rather than individual stars because as Wright writes “A technological species that could build a Dyson sphere could also presumably spread to nearby star systems so it s fair to think a galaxy with one Dyson sphere may have several and several would be easier to find than just one Might as well start there None were found but you know that because you would ve surely heard about it if Wright s search had succeeded Wright prides himself on the agnosticism of this approach He doesn t need aliens to be looking for us or to have any certain sociological impulses They just need technology “Technology uses energy he told me “That s kind of what makes it technology Just like life uses energy That view makes demolishing a Jupiter sized planet to build a star encompassing megastructure seem almost comically simple but Wright doesn t even see the existence of a Dyson sphere as requiring massive coordination or forethought on the aliens part It is truly in his view a low intensity ask He compared it to Manhattan a fair example of a human “megastructure a massive interconnected artificial system “It was planned to some degree but no one was ever like Hey let s build a huge city here It s just every generation made it a little bigger He thinks a Dyson sphere or swarm could accumulate in a similar manner “If the energy is out there to take and it s just gonna fly away to space anyway then why wouldn t someone take it Wright knows the objections that this imagines a capitalist orientation a drive to “dominate nature that is by no means universal not even among human societies But for his research to work this drive doesn t need to be universal among the stars It just has to have happened sometimes enough for us to see the results As he put it “There s nothing that drives all life on Earth to be large In fact most life is small But some life is large And if an alien were to come to Earth they wouldn t need to see all the small life to know the planet was inhabited A single elephant would do the trick Some hypothetical alien technosignatures might be less definitive In astronomers detected a roughly quarter mile long rocky object slingshotting through the solar system They realized that this object called Oumuamua came from outside the system ーbecause of its speed and the path it took It was the first interstellar object ever detected in our system While hopes or fears that it was an alien probe were not realized it was a reminder that alien technology could be found closer to home lurking around our own sun “We don t know that there s not technology here because we ve never really checked Wright said “I mean I guess if they had cities on Mars we would noticeーif they were on the surface anyway But he pointed out much of the Earth s surface doesn t have active visible technology The same could go for the solar system beyond Earth too There could be alien probes or debris like Oumuamua but constructed moving so fast or so dark that we don t see them Maybe there s an alien base on the dwarf planet Ceres or buried under the surface of Mars The lunar monolith in A Space Odyssey Wright reminded me was buried just under the surface of the moon All those ancient interstellar gates sci fi is fond of have to be found before they can be used Don t forget until our best image of Pluto was a blurry blob So much of what we know about even our own solar system is inference and assumption Skeptics love to ask Okay so where is everyone But we don t know for sure that they aren t ーor haven t been ーhere This article originally appeared on Engadget at	2023-04-23 14:30:47
ニュース	BBC News - Home	Sudan violence: UK diplomats evacuated from Khartoum	https://www.bbc.co.uk/news/uk-65367019?at_medium=RSS&at_campaign=KARANGA	khartoumhundreds	2023-04-23 14:32:04
ニュース	BBC News - Home	CBI rape allegations 'shocking' says Labour shadow minister	https://www.bbc.co.uk/news/business-65364950?at_medium=RSS&at_campaign=KARANGA	ashworth	2023-04-23 14:19:50