Category Archives: Social

用人力就可以達到離心機的效果...

看到「This Human-Powered Paper Centrifuge Is Pure Genius」這個設計真的很巧妙... 全文刊登在 nature biomedical engineering 上:「Hand-powered ultralow-cost paper centrifuge」。 起源來自於小時候的玩具 (我也有印象,但忘記中文叫什麼了...): Here, we report an ultralow-cost (20 cents), lightweight (2 g), human-powered paper centrifuge (which we name ‘paperfuge’) designed on the basis of a theoretical model … Continue reading

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伊朗透過 BGP 管制網路的手段影響其他國家網路...

Dyn (之前被 DDoS 打爆,過一陣子被 Oracle 買去的那個 Dyn) 的這篇「Iran Leaks Censorship via BGP Hijacks」講到他們偵測到伊朗透過 BGP hijack 管制網站的問題。 前陣子伊朗透過 private ASN 放了 99.192.226.0/24 出來,影響到其他國家: Last week, Iranian state telecom announced a BGP hijack of address space (99.192.226.0/24) hosting numerous pornographic websites. 由於這段 … Continue reading

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線上測試 SQL Injection 喔喔喔

在「An SQL Injection Attack Is a Legal Company Name in the UK」這邊看到英國的這家公司:「; DROP TABLE "COMPANIES";-- LTD」,根本就是在幫大家測試 XDDD 當然,大家也都馬上聯想到這則 xkcd 漫畫:「Exploits of a Mom」。 來招喚 QQ 姊翻譯這則 xkcd 漫畫?

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電信商對 Zero Rating 與網路中立性的問題

在「AT&T users will be able to stream DirecTV Now without using their data」這邊才看到 FCC 在這個月月初針對電信商對特定服務的 zero rating 發出警告:「The FCC tells AT&T it may be violating net neutrality with its DirecTV plans」: AT&T is far from the only US carrier to … Continue reading

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英國通過法案要求 ISP 記錄使用者觀看過的網站

英國前幾天通過了最激烈的隱私侵犯法案,要求 ISP 必須記錄使用者觀看過的網站:「Britain has passed the 'most extreme surveillance law ever passed in a democracy'」: The law forces UK internet providers to store browsing histories -- including domains visited -- for one year, in case of police investigations. 不愧是 George … Continue reading

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Tumber 的 PHP 7

Tumblr 發表了一篇在導入 PHP 7 後的感想:「PHP 7 at Tumblr」。從這兩張圖就可以看得很明白了,Yahoo! 的工程師很滿意結果: 又多了一個推薦的評價...

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Facebook 備份 MySQL 資料並且確認正確性的方法

Facebook 再多花了一些篇幅數對於 MySQL 資料備份以及確認正確性的方法:「Continuous MySQL backup validation: Restoring backups」。 首先是 Continuous Restore Tier (CRT) 這塊,可以看到他們在這塊很仰賴 HDFS 當作備份的第一層基地,包括了 Full logical backups (用 mysqldump)、Differential (diff) backups 以及 Binary log (binlog) backups (stream 進 HDFS)。 另外上了 GTID,對於後續的處理會比較方便: All of our database servers also … Continue reading

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玩 Python 下的 ggplot

在「A Dramatic Tour through Python’s Data Visualization Landscape (including ggplot and Altair)」這邊又再次看到 Python 下的 ggplot,以為還算好裝,但實際上好像有點難裝 XD 我平常用的環境是 pyenv 跑 Python 3.5.2。而跑 ggplot 需要用到 _tkinter,這個模組,而這個模組在 Python 3 應該是內建的... 只要你有先裝 tk-dev @_@ 所以在弄了半天發現這個問題後,先把 tk-dev 補裝上,再重新安裝 Python 3.5.2: $ sudo apt-get install tk-dev … Continue reading

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服務當掉後的偵測

CNN 這篇「Netflix goes down. Twitter blows up」提到了昨天 Netflix 當了好幾個小時的情況。裡面提到了 Down Detector 這個服務: Downdetector -- which monitors outage complaints online -- reported more than 13,000 posts from users all over the world Saturday afternoon. 到 Down Detector 網站上看,這個服務有一部份是從 social network 上挖資料: … Continue reading

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華盛頓郵報的歷史創舉:呼籲對告密者的求刑

在英國衛報與華盛頓郵報因報導 Snowden 事件而拿到 2014 年的普立茲獎後,華盛頓郵報正式公開立場,表達應該將 Snowden 弄回美國受審,而非現在大家在呼籲的特赦:「WashPost Makes History: First Paper to Call for Prosecution of Its Own Source (After Accepting Pulitzer)」。 In doing so, the Washington Post has achieved an ignominious feat in U.S. media history: the first-ever paper … Continue reading

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