【解説】新500円貨幣の特徴

By: Sexy

On: September 3, 2025

Tagged: Art, Bank, Brand, Business, Collection, Company, Design, Development, Finance, Government, Industry, Material, Memori, Model, Money, Movie, Reference, Sample, Service, SNS, Special, System, Technology, Trend

With: 0 Comments

令和3年11月1日より新しい500円貨幣の発行が開始されました。
この動画では、これまでの500円貨幣との違いや、新500円貨幣に搭載されている偽造防止技術などをご紹介します。
お手元に新500円貨幣が届きましたら、是非手に取って確認してみてください！

財務省ホームページ「解説！新しい500円貨」でも解説していますので、よろしければご覧ください。
https://www.mof.go.jp/policy/currency…

#造幣局
#新500円貨幣

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Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web and that is typically operated by search engines for the purpose of Web indexing (web spidering).

Web search engines and some other websites use Web crawling or spidering software to update their web content or indices of other sites' web content. Web crawlers copy pages for processing by a search engine, which indexes the downloaded pages so that users can search more efficiently.

Crawlers consume resources on visited systems and often visit sites unprompted. Issues of schedule, load, and "politeness" come into play when large collections of pages are accessed. Mechanisms exist for public sites not wishing to be crawled to make this known to the crawling agent. For example, including a robots.txt file can request bots to index only parts of a website, or nothing at all.

The number of Internet pages is extremely large; even the largest crawlers fall short of making a complete index. For this reason, search engines struggled to give relevant search results in the early years of the World Wide Web, before 2000. Today, relevant results are given almost instantly.

Crawlers can validate hyperlinks and HTML code. They can also be used for web scraping and data-driven programming.