JANOG51発表資料 https://www.janog.gr.jp/meeting/janog51/dns/ 2017年のJANOG39にて弊社から「DNS権威サーバ向けのDDoS攻撃対策をした話～さくらインターネット編～」というプログラムを行い、実際に発生した障害やその後の取り組みを共有し…
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DNS権威サーバのクラウドサービス向けに行われた攻撃および対策 / DNS Pseudo-Random Subdomain Attack and mitigations
JANOG51発表資料 https://www.janog.gr.jp/meeting/janog51/dns/ 2017年のJANOG39にて弊社から「DNS権威サーバ向けのDDoS攻撃対策をした話～さくらインターネット編～」というプログラムを行い、実際に発生した障害やその後の取り組みを共有し…
1 はじめに 最近、我々+数名でスパースモデリングという分野を勉強しています。詳細はまた別の記事にて紹介するにして、今回はスパースモデリングの前段階に当たる リッジ回帰(ridge regresion) に脚光を当てます1。 読者には釈迦に説法かもしれませんが、リッジ回帰は L2 正則化とも呼ばれ機械学習の中でも非常にスタンダードな概念の一つになっています。しかし専門的に正則化法を扱ってみて、案外知らなかったことを知れたのでまとめました。 まず、リッジ回帰での損失関数は以下のような式で記述されます。 \begin{align} E = (y - X \vec{w})^2 + \alpha \vec{w}^T \vec{w} \end{align} 上記の損失を最小化するように係数の重みベクトル \(\vec{w}\) を推定します。解析的には \(\vec{w}\) について微分をしたもの
権威DNSサービスへのDDoSと
ハイパフォーマンスなベンチマーカ / DNS Pseudo random subdomain attack and High performance Benchmarker
権威DNSサービスへのDDoSと ハイパフォーマンスなベンチマーカ YAPC::Kyoto 2023 at Kyoto Research Park 2023/03/19
【シングルセル】Single Cell RNA-seqデータを用いた疑似バルクRNA-seq解析を行う方法【pseudo bulk analysis】 - LabCode
擬似バルク RNA-seq 解析（pseudo bulk RNA-seq analysis）とは？ 疑似バルク解析（pseudo bulk analysis）とは、シングルセルRNA-seqデータを用いて、bulk RNA-seqの解析手法を適用できるようにすることです。以下でもう少し詳しく説明します。 バルクRNA-seqとは バルクRNA-seqは、多数の細胞から抽出されたRNAをまとめて解析します。比較的安価で、広く利用されています。scRNA-seqと違って全体のRNA発現プロファイルを提供しますが、個々の細胞の違いは反映されません。そのため大規模な発現変動の解析、遺伝子発現のパターンの特定、疾患関連遺伝子の発見などに適しています。 疑似バルク解析とは 疑似バルク解析（pseudo-bulk analysis）は、シングルセルRNA-seq（scRNA-seq）データを用いて、バル
GitHub - good-lly/lowstorage: 💾 Simple, lightning fast, object pseudo-database for S3-compatible storages using Avro schema
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Pseudo-elements are in use for a long time. However, there are some uses cases that I feel they are not entirely known across developers. I wrote down this article to shed light on them so they can be used more. Parent-child Hover Effect Since the pseudo-element belongs to its parent element, there are some unusual use cases for that. For now, let’s explore a straightforward example to demonstrate
Meet :is() and :where() These are functional pseudo-class selectors, notice the () at the end and the way they start with :. Think of these as runtime dynamic function calls that match elements. When writing CSS, they give you a way to group elements together in the middle, beginning or end of a selector. They also can change specificity, giving you power to nullify or increase specificity. Select
This can arise when you have different threads. But it’s of prime importance in a lazy language like Haskell, since it makes it possible to generate deterministic random numbers lazily. For instance, split is used in QuickCheck’s Gen monad. An easy implementation of split is to duplicate the current state. But, the two parallel sequences will not be independent: indeed they will be identical. A sl
The “focus indicator”, as its name suggests, visually indicates (often with a kind of an outline) that an element has focus. That sounds simple enough, and it perfectly describes what the old :focus selector makes possible. However, for decades now, whether a browser will actually display a focus indicator natively has been a considerably more complex affair. Focus indicator on different elements
GA4（Googleアナリティクス4）のuser_id、user_pseudo_id、ga_session_idの違い おおまかな違い user_id user_pseudo_id ga_session_id
A Guide To Newly Supported, Modern CSS Pseudo-Class Selectors — Smashing Magazine
The CSS Working Group Editor’s Draft for Selectors Level 4 includes several pseudo-class selectors that already have proposal candidates in most modern browsers. This guide will cover ones that currently have the best support along with examples to demonstrate how you can start using them today! Pseudo-class selectors are the ones that begin with the colon character “:” and match based on a state
Web Component Pseudo-Classes and Pseudo-Elements are Easier Than You Think | CSS-Tricks
Web Component Pseudo-Classes and Pseudo-Elements are Easier Than You Think We’ve discussed a lot about the internals of using CSS in this ongoing series on web components, but there are a few special pseudo-elements and pseudo-classes that, like good friends, willingly smell your possibly halitotic breath before you go talk to that potential love interest. You know, they help you out when you need
How to make reusable components with pseudo-selectorsAn Introduction To Control Components Pseudo-selectors like :hover can make a huge impact on user experience, but they haven't composed well with React – until now! So you’ve built yourself a <Button> component, and it’s a darn good button at that. It’s got props to configure everything you’d ever need - the label, icon, colors, and even a loadi
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わしの思うリッジ回帰(L2正則化)と正則化法。 - Pseudo Theory of Everything
Uncommon Use Cases For Pseudo Elements
New CSS functional pseudo-class selectors :is() and :where() | Articles | web.dev
Splittable pseudo-random number generators in Haskell: random v1.1 and v1.2
The Focus-Indicated Pseudo-class :focus-visible
GA4のuser_id、user_pseudo_id、ga_session_idの違いについて
How to make reusable components with pseudo-selectors
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