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各種道路設計對於流量的影響?

在「The rates of traffic flow on different kinds of 4-way intersections」這邊看到有趣的東西,利用遊戲 Cities: Skylines 模擬各種道路設計對流量的影響:

This is an animation of traffic flows simulated on 30 different kinds of four-way junctions, from two roads intersecting with no traffic lights or signs to complex stacked interchanges that feature very few interactions between individual cars. It was recorded in a game called Cities: Skylines, a more realistic take on SimCity.

影片在這:

記得這是模擬,實際情況會有其他考量,所以裡面的結果參考就好...

然後裡面有看到很多常見的設計,還有一些沒看過的神奇設計 XD 另外有些設計超級複雜,第一次開的人真的會知道怎麼開嗎 XDDD

Facebook 自己找人研究,Social Media 是否對人類有害 XDDD

之前看到「Hard Questions: Is Spending Time on Social Media Bad for Us?」這篇,一直不知道要怎麼吐槽... 然後看到 Twitter 上的這則 tweet XDDD

既視感太重了,找了一下其他行業對應的資料:

真的不知道怎麼吐槽 XDDD

Twitter 放出來的 Vireo,一套 Open Source 授權的 Video Processing Library

Twitter 放出 Vireo,一套以 MIT License 釋出的 Video Processing Library:「Introducing Vireo: A Lightweight and Versatile Video Processing Library」。專案庫在 GitHubtwitter/vireo 可以取得。

C++ 寫的,另外也已經提供 Scala 的接口,這應該是讓 Twitter 的人可以方便使用:

Vireo is a lightweight and versatile video processing library that powers our video transcoding service, deep learning recognition systems and more. It is written in C++11 and built with functional programming principles. It also optionally comes with Scala wrappers that enable us to build scalable video processing applications within our backend services.

在 Tools 的部份也可以看到很多功能,像是:

thumbnails: extracts keyframes from the input video and saves them as JPG images

viddiff: checks if two video files are functionally identical or not (does not compare data that does not affect the playback behavior)

另外要注意的是,預設不會將 GPL 的套件納入編譯,需要指定 --enable-gpl 才會編進去:

The following libraries are disabled by default. To enable GPL licensed components, they have to be present in your system and --enable-gpl flag have to be explicitly passed to configure

看起來主要就是最常見的那包... (libavformat / libavcodec / libavutil / libswscale / libx264)

俄羅斯在英國脫歐的議題上,也利用 Social Network 的廣告影響民意

TechCrunch 上看到的,俄羅斯政府不只在美國選舉時這樣做,同時也在英國脫歐公投的議題上進行操作:「Twitter says Russians spent ~$1k on six Brexit-related ads」。

不過金額比美國選舉時小了很多:

In response to the Commission’s request for information concerning Russian-funded campaign activity conducted during the regulated period for the June 2016 EU Referendum (15 April to 23 June 2016), Twitter reviewed referendum-related advertising on our platform during the relevant time period.

Among the accounts that we have previously identified as likely funded from Russian sources, we have thus far identified one account—@RT_com— which promoted referendum-related content during the regulated period. $1,031.99 was spent on six referendum-related ads during the regulated period.

With regard to future activity by Russian-funded accounts, on 26 October 2017, Twitter announced that it would no longer accept advertisements from RT and Sputnik and will donate the $1.9 million that RT had spent globally on advertising on Twitter to academic research into elections and civil engagement. That decision was based on a retrospective review that we initiated in the aftermath of the 2016 U.S. Presidential Elections and following the U.S. intelligence community’s conclusion that both RT and Sputnik have attempted to interfere with the election on behalf of the Russian government. Accordingly, @RT_com will not be eligible to use Twitter’s promoted products in the future.

Twitter 的 280 字帶來的差異

在「140 Vs. 280: Users Engage With Longer Tweets Data Shows」這邊分析了在 Twitter 上 0~140 與 141~280 字的 tweet 所帶來的互動差異:

可以看到較長的 tweet 會有比較多的 retweet 與 like,不過更細一步的分析就沒有了... 文章內也有提到資料的分析是怎麼來的:

The data parameters: 30,000 publisher tweets that included links between November 29 – December 6.
The results: The click-through rate was roughly equal for both tweet length types but overall engagement nearly doubled for longer tweets. On tweets containing 141-280 characters, the average retweet was a staggering 26.52% – compared the 13.71% for tweets with 0-140 characters. For likes, tweets containing 141-280 characters had an average of a whopping 50.28%, compared to 0-140’s 26.96%.

成田機場第二航廈需要過兩個閘門的問題將在 2019 被解決

從 JR 進入成田機場第二航廈,需要過兩個閘門的情況 (先過一次進到京成線,再過一次進到第二航廈),一直是個讓人不太能理解的問題... 這個問題因為 2020 年的東京奧運而被拿出來討論,決定在 2019 年要改善:

本來進入第二航廈有檢查站,這是為了防止當地居民抗議而設置的 (參考日文版維基百科「成田国際空港」裡的「警備・検問・入場制限」這段說明),而這項限制在 2015 年三月底取消後,本來 JR 會需要先進到京成線的設計就變得多餘了:

成田空港第2ターミナルの最寄り駅・空港第2ビル駅では1992年の駅の開業当初から2015年3月下旬までの間、駅の出口で手荷物検査が行われていました。このため、JR線を利用して駅に訪れた人は、京成線の改札を経由してターミナルに向かう必要があったため、この状態は現在も解消されずに続いています。

不過新聞雖然這樣講,其實我還是沒搞懂... 都先進到檢查站不就好了嗎,當初是有什麼因素造成先進到京成線這個 workaround 嗎 XDDD

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