投稿時間:2022-04-27 12:27:55 RSSフィード2022-04-27 12:00 分まとめ(31件)

カテゴリー等	サイト名等	記事タイトル・トレンドワード等	リンクURL	頻出ワード・要約等/検索ボリューム	登録日
IT	ITmedia 総合記事一覧	[ITmedia PC USER] Samsung、防水防塵設計のUSB 3.2外付けポータブルSSD	https://www.itmedia.co.jp/pcuser/articles/2204/27/news097.html	itmediapcusersamsung	2022-04-27 11:42:00
IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] 22年の昇給率は10年間で最高の3.74％、業種別では？　米国の日系企業	https://www.itmedia.co.jp/business/articles/2204/27/news086.html	itmedia	2022-04-27 11:25:00
TECH	Techable（テッカブル）	世界で最多ダウンロードはTikTok、ガソリン価格トラッキングアプリの需要も増加	https://techable.jp/archives/177810	instagram	2022-04-27 02:10:44
python	Pythonタグが付けられた新着投稿 - Qiita	APIでコンフルエンスのグループを取得してExcelに書き出す	https://qiita.com/ranmatsu/items/c38dc3065a703986726b	excel	2022-04-27 11:26:53
js	JavaScriptタグが付けられた新着投稿 - Qiita	名所と名言、動的に変化させ表示させる(JavaScript)	https://qiita.com/yoshi_yast/items/a0da2f8a4bca2fc63294	javascript	2022-04-27 11:17:57
AWS	AWSタグが付けられた新着投稿 - Qiita	Genvidクラスタのクラウドデプロイに必要なインスタンスの種類（AWS / Azure）	https://qiita.com/Takaaki_Ichijo/items/7029e39b0644d9ab49ac	awsazuregenvid	2022-04-27 11:26:36
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure IoT Hubを久しぶりに触ってみたので個人的な備忘録 3	https://qiita.com/mstakaha1113/items/bf312e34f0ee53fde239	azure	2022-04-27 11:30:34
Azure	Azureタグが付けられた新着投稿 - Qiita	Genvidクラスタのクラウドデプロイに必要なインスタンスの種類（AWS / Azure）	https://qiita.com/Takaaki_Ichijo/items/7029e39b0644d9ab49ac	awsazuregenvid	2022-04-27 11:26:36
技術ブログ	Developers.IO	[AWS Step Functions] ステートマシンが無限ループして148ドルも課金が発生した話	https://dev.classmethod.jp/articles/aws-stepfunctions-state-machine-looped-endlessly-causing-148-dollars-billing/	eventbridg	2022-04-27 02:48:31
技術ブログ	Developers.IO	Storj DCSのS3互換のサービスを使用してデータを扱ってみる – AWS SDK –	https://dev.classmethod.jp/articles/using-s3-gateway-with-awssdk-at-storj-dcs/	awscli	2022-04-27 02:29:48
海外TECH	DEV Community	Lifecycle Of A Blockchain Transaction	https://dev.to/marlonaesparza/lifecycle-of-a-blockchain-transaction-2h3p	Lifecycle Of A Blockchain TransactionFirst I want to thank Patrick McCorry for making all of this knowledge available to myself and others Second I d like to assert that I m writing from a Bitcoin and Ethereum paradigm but these principles apply to most blockchains OverviewWe ll be looking at the lifecycle of a transaction that can be broken down into three simple steps a user sends a transaction to the peer to peer network pending transactions eventually reach block producers and the fee market entices block producers miners to pick transactions for the next block In order to expand on each of these points we ll cover what peers nodes and block producers miners are in detail In a following blog we ll go over exactly what users are and how they interact with the blockchain network Peers Of A Peer To Peer NetworkThe peers of a peer to peer PP network are essentially us the people represented as nodes computers Being a peer on the PP network boils down to stabilizing a network where financial incentives lie or altruistically As a peer node on the network you offer connection slots propagate messages and serve history Connection slots are connections to a small group of peers nodes to help form a mesh network where nodes connect directly dynamically and non hierarchically to as many other nodes as possible to cooperate with one another The propagation of messages acts as a filter where nodes check the validity of transactions and blocks before passing them onto their peers Serving history helps new peers catch up on the network by providing historical blocks Peers are able to connect with other peers through two approaches trusted DNS seeds hard coded and advertisements on the network DNS seeds are servers which return trusted IP addresses peers that when connected to can be sent requests for a list of active peers IP addresses up to on the network that are ranked by the DNS seed s reputation algorithm Advertising on the network is done by sharing your nodes connection details to its closest peers or initial connections who will then advertise the details to their closest peers There are two types of connections peers are able to have incoming and outgoing Incoming connections happens when a peer wants to connect their node with your node An outgoing connection happens when you want to connect your node with a peer s node It s important to have both incoming and outgoing connections because this increases the availability of connection slots and prevents one from a solar eclipse attack where a peer s point of view is controlled by malicious agents who choose to feed the peer incorrect information Connecting to at least one honest peer guarantees that you ll always be able to discern the truth and follow the correct longest heaviest blockchain In order for a transaction to be propagated throughout the entire network a user must advertise a transaction to a single peer on the network The peer in turn makes an announcement to all of its connected peers sending a hash of the transaction fixed byte value rather than the full transaction payload and the connected peers receiving the announcement will determine whether or not they have the transaction payload already by querying their local replicated database with the transaction hash If the connected peer doesn t already have the transaction payload then they ll request it from the initial peer that made the announcement to begin with then the connected peer makes an announcement just like the initial peer until finally every peer on the network has the transaction payload data in their local replicated database The reason peers propagate a transaction hash first rather than the transaction payload is to save on bandwidth consumption used by the network If a connected peer already has the transaction payload then there s no reason to send it over Each peer node has a memory pool which is a pending list of transactions that have been propagated but not confirmed within a newly produced block Memory pools are a local policy implemented by nodes and have nothing to do with consensus agreement of the network and they help mitigate flood protection on the network by relatively synchronizing transaction lists across all peers Flood attacks are costly to perform as every transaction included in the blockchain will be charged a fee In Bitcoin duplicate transactions pay the minimum transaction fee but in Ethereum they pay a fee bump There are different types of nodes that support the network full archival pruned and light client Every node validates blocks and transactions in real time except light clients Full nodes keep a copy of all historical blocks and makes a copy of the database publicly available Archival nodes a k a indexed nodes keep a snapshot of the state of the database for every block produced Light client nodes keep a collection of it s own data user activity and a very shallow copy of the blockchain block headers The ultimate goal of a peer to peer network is data availability and message propagation which guarantees that new blocks are publicly available and that anyone without bounds can send a message to all peers on the network Block Producers Of A BlockchainThe block producers miners of a blockchain are essentially entities with financial incentive to produce the next block They provide a simple service and don t run the network They re incentivized to be honest but should not be trusted Block producers are able to produce a block that doesn t follow protocol but the PP network will reject it and it ll cost the block producer money Their activity can be broken down to this order transactions within a block and extend the longest chain with the block In order for a block producer to be chosen to produce the next block for the blockchain he she it must win the leader election There is a tricky question which comes into play here how do we create a list candidates when there s no strong notion of identity There s isn t a trusted identity to create such a list either The answer to this question is Proof Of X work stake where one proves ownership over a scarce resource that should be limited and expensive to acquire In the Nakamoto Consensus algorithm there are two ways to win the leader election self selection and proportional selection Self selection is where participants block producers purchase resources and register Proportional selection is where participants are elected to become the leader proportional to their ownership of resources The leader election is not a free game to play and only works if the miner block producer can cover costs of producing a new block and return a profit still There are two types of cost associated with being a block producer upfront costs to purchase hardware or tokens and on going costs to participate which includes electricity and computation bandwidth There are two revenue streams that come from being a block producer network fees and the issuance of new coins tokens Network fees are collected from user transactions included the block produced and issuance fees are a protocol reward which subsidizes the block producer with newly minted coins The long term plan for Bitcoin is to rely solely on network fees to reward the miners because eventually all million Bitcoins will have been minted and issued Producing blocks of transactions is a knapsack problem the space of a block is limited and the block producer miner wants to fill the bag with transactions that ll return the most profit Every user transaction carries with it a weight byte size gas limit and value fee paid to the miner so the block producer can determine which transactions they d like to include in a newly produced block This is why transactions are confirmed eventually and why some transactions take a lot longer to confirm than others	2022-04-27 02:28:07
Apple	AppleInsider - Frontpage News	Facebook doesn't know what most of its user data is used for	https://appleinsider.com/articles/22/04/27/facebook-doesnt-know-what-most-of-its-user-data-is-used-for?utm_medium=rss	Facebook doesn x t know what most of its user data is used forFacebook privacy engineers warn that the company would have a hard time committing to privacy laws as it largely has no idea how its system uses the data it collects As global regulators begin to crack down on how companies collect and handle user data many are now figuring out how to operate under more restrictive policies Facebook however will have a much harder time than most As it turns out the company can t actually tell where its user data comes from or where the data is stored A leaked internal document seen by Engadget sheds some light on the situation Read more	2022-04-27 02:38:07
Apple	AppleInsider - Frontpage News	Studio Display update 15.5 with webcam fix now available for beta testers	https://appleinsider.com/articles/22/04/26/studio-display-update-155-with-webcam-fix-now-available-for-beta-testers?utm_medium=rss	Studio Display update with webcam fix now available for beta testersApple confirms that the third developer beta of macOS Monterey also contains an update for the Studio Display that it says fixes the monitor s poor webcam quality ーbut so far the results are lacking Studio Display Firmware Update available to macOS beta testersApple calls the update Studio Display Firmware Update but previous sleuthing revealed the Studio Display runs a version of iOS The new update aims to provide a fix for the webcam quality issues reported by users Read more	2022-04-27 02:25:16
海外TECH	Engadget	After Musk's Twitter takeover, an open-source alternative is 'exploding'	https://www.engadget.com/twitter-alternative-mastodon-open-source-021001965.html?src=rss	After Musk x s Twitter takeover an open source alternative is x exploding x We may not yet know exactly what Elon Musk s takeover of Twitter means for the platform but one Twitter alternative is already booming as a result of the news Mastodon the open source social media service which bills itself as the “largest decentralized social network on the internet has been quot exploding quot since Musk s acquisition according to its founder News of Twitter s buyout has rattled Twitter employees and users as Musk has indicated he plans to take a much more hands off approach to content moderation As is often the case when Twitter makes a controversial change some users have threatened to leave the platform while critics have pushed RIPTWITTER to trend In this case at least some disgruntled users are apparently turning to Mastodon as a potential alternative Hours after the Twitter acquisition was announced Mastodon said it saw “an influx of approx users Of those about were new users Mastodon founder Eugen Rochko wrote in a blog post “Funnily enough one of the reasons I started looking into the decentralized social media space in which ultimately led me to go on to create Mastodon were rumours that Twitter the platform I d been a daily user of for years at that point might get sold to another controversial billionaire he wrote “Among of course other reasons such as all the terrible product decisions Twitter had been making at that time And now it has finally come to pass and for the same reasons masses of people are coming to Mastodon We re observing an influx of approx users to the Mastodon network todayーMastodon joinmastodon April Mastodon s official iOS and Android apps are also seeing an uptick in users according to data provided by analytics firm Sensor Tower The apps have been downloaded roughly times “or nearly of its lifetime total downloads since Monday according to the firm The app is currently ranked No on the App Store charts for social media apps It s not the first time Mastodon has benefited from issues at Twitter The company was briefly popular in following outrage over Twitter s decision to remove user handles from the character limit for replies back when Twitter changed its product so infrequently even mundane changes were fodder for mass outrage Mastodon saw another uptick in when users in India were angry over moderation policies nbsp While Mastodon has been in the spotlight as a potentially viable Twitter alternative in the past it has yet to reach the mainstream But its current popularity comes at a moment when Twitter is also exploring how it could become an open sourced protocol ーmuch like Mastodon Unlike Twitter Mastodon is not a single centralized service Though the interface looks similar to Twitter ーit has a character limit but otherwise will be mostly recognizable to Twitter users ーit runs on an open source protocol Groups of users are free to create and maintain their own “instances with their own rules around membership moderation and other key policies Users are also able to take their followers with them between instances Mastodon operates its own instances mastodon social and mastodon online but those are apparently overloaded according to Rochko who suggests that new users sign up via the official apps and join other communities on the service And because it s open source Mastodon makes its code available on GitHub an idea Musk has also endorsed with regards to Twitter s algorithms But all that also comes with extra complexity for new users who may not easily understand Mastodon s unique structure or how it works But those who stick around long enough may see some significant new features Rochko said that end to end encrypted messaging is in the works as well as “an exciting groups functionality	2022-04-27 02:10:01
金融	ニッセイ基礎研究所	デイサービス車両は高齢者の移動を支える「第三の交通網」を形成できるか（中）～群馬県発「福祉ムーバー」の取組から～	https://www.nli-research.co.jp/topics_detail1/id=70990?site=nli	nbsp坊たくさんの話題を提供して頂きましたが、高齢化によって、これまでの交通サービスとはマッチしない、移動に他人の付き添いや介助が必要な需要層が出現し、地域に染み出てきているのではないかというご指摘は、とても大きい話だと思いました。	2022-04-27 11:51:45
ニュース	ジェトロ ビジネスニュース（通商弘報）	日本とチリ、運転免許協定に署名	https://www.jetro.go.jp/biznews/2022/04/8454a2d23fa76c66.html	運転免許	2022-04-27 02:10:00
海外ニュース	Japan Times latest articles	Online army deploys to save Ukraine’s art and heritage	https://www.japantimes.co.jp/news/2022/04/27/world/ukraine-art-online-army/	Online army deploys to save Ukraine s art and heritageHistorians librarians and IT specialists from around the world have joined forces since the invasion began to form an online army to backup everything from	2022-04-27 11:32:14
海外ニュース	Japan Times latest articles	Anger erupts at Xi’s ‘Big White’ army of lockdown enforcers	https://www.japantimes.co.jp/news/2022/04/27/asia-pacific/china-covid-enforcers/	Anger erupts at Xi s Big White army of lockdown enforcersSince Shanghai went into lockdown the brigade of workers and volunteers in white hazmat suits have become the focus of public anger for their role	2022-04-27 11:23:37
海外ニュース	Japan Times latest articles	Can Twitter become more profitable under Elon Musk?	https://www.japantimes.co.jp/news/2022/04/27/business/tech/twitter-profit-elon-musk/	world	2022-04-27 11:13:23
ニュース	BBC News - Home	Mail on Sunday rejects Sir Lindsay Hoyle's invite over Angela Rayner story	https://www.bbc.co.uk/news/uk-61239321?at_medium=RSS&at_campaign=KARANGA	deputy	2022-04-27 02:49:44
ニュース	BBC News - Home	Fear over high rates of diabetes foot amputations	https://www.bbc.co.uk/news/health-61235793?at_medium=RSS&at_campaign=KARANGA	government	2022-04-27 02:03:25
ニュース	BBC News - Home	Asthma: Women at higher risk of attacks than men, charity says	https://www.bbc.co.uk/news/health-61234443?at_medium=RSS&at_campaign=KARANGA	asthma	2022-04-27 02:06:34
北海道	北海道新聞	米への輸出支援枠組み発足　農林水産物の販路開拓	https://www.hokkaido-np.co.jp/article/674665/	販路開拓	2022-04-27 11:21:00
北海道	北海道新聞	発見は子どもの骨か、山梨　不明女児との関連慎重捜査	https://www.hokkaido-np.co.jp/article/674664/	山梨県道志村	2022-04-27 11:19:00
北海道	北海道新聞	中国艦、鹿児島で領海侵入　昨年１１月以来、懸念伝える	https://www.hokkaido-np.co.jp/article/674658/	中国海軍	2022-04-27 11:16:00
北海道	北海道新聞	親ロ派「大統領」が批判　モルドバで緊張高まる	https://www.hokkaido-np.co.jp/article/674656/	隣接	2022-04-27 11:13:00
北海道	北海道新聞	日本海側中心に２８日にかけ暴風　北海道内	https://www.hokkaido-np.co.jp/article/674622/	北海道内	2022-04-27 11:10:12
北海道	北海道新聞	森外務次官がコロナ感染　軽症、省内に濃厚接触者なし	https://www.hokkaido-np.co.jp/article/674655/	外務事務次官	2022-04-27 11:05:00
北海道	北海道新聞	首相、社会起業家と対話　新資本主義計画に反映	https://www.hokkaido-np.co.jp/article/674654/	人工知能	2022-04-27 11:03:00
IT	週刊アスキー	外側がお肉！ ローソン「肉バーガー」新発売	https://weekly.ascii.jp/elem/000/004/090/4090314/	肉バーガー	2022-04-27 11:30:00
IT	週刊アスキー	IPA、国家試験「基本情報技術者試験（FE）」「情報セキュリティマネジメント試験（SG）」を2023年4月から通年試験化	https://weekly.ascii.jp/elem/000/004/090/4090328/	国家試験	2022-04-27 11:30:00