Random #5: Make YouTube great again!

My YouTube Home feed has more than 50% of the videos from channels I'm not even subscribed to, while many subscribed channels simply do not appear on my feed.

The shift in recent years in social media from "telling the system what you like" to "system telling you what you like" is troublesome. The fact is we know what we want, and not watching a certain channel for a few weeks doesn't mean we will never want to watch it (that's what the Unlike or Unsubscribe button is for!).

I argue that there are two types of content that one watches: funny, quick, one-off content, and actually interesting, lengthy, in-depth content. Examples of the former includes (and these are directly from my YouTube feed right now) Microsoft Sam Beatbox Duet, 1996 Pontiac Grand Pix Recall: interesting for when you are relaxing, but I basically don't want to see anything like it anymore after watching it. Examples of the latter would be: The Impact of 6GHz on Network Design, PS5 Slim First Look and TEARDOWN!!, or I Visited the Most Depressing Town in Singapore.

Suggesting new content is great to help discover new channels and give visibility to new creators, but there is a limit to it: there is a reason a user decide to subscribe to a channel instead of just watching it and leave, and since the algorithm does not know how the user liked it or not (who cares about the like button anymore??), it is idiotic to suggest this much new content to a user just because the user fell for two clickbaity videos two times in a row.

Going back to the two types of content. Please, only ever suggest a few of the first type, and never the same topic over and over. For the second type, please, prioritize what we literally said we liked, instead of filling my entire feed with train videos (yes I like trains, but I also like many other things that I literally told the algorithm by subscribing).

Thanks for listening. After seeing the 20th Burger King Pokeball recall advertisement parody being suggested just because a few weeks ago I felt bored and watched a few in a row, I decided that I have to write something about this.

Transferring file over high-bandwidth, high-latency link - bbcp

As you might know, I live in Canada while my home server is located in Macau. Both sides have decent internet connection: 150Mbps symmetrical in Macau, 350/100Mbps in Canada. While not crazy fast, this is fast enough for most cases, even for transferring large files. But there is a problem: I can never get this speed...

Speed test from my computer in Canada to my server in Macau via LibreSpeed. Look at that juicy ping and revolutionary upload speed...

The problem

The problem is simple: I can download from my home server somehow close to the limit (150Mbps) but I can only upload at less than 10% of theoretical upload speed, seemingly for no reason.

The investigation

I tried running speedtest from Canada to different hosts in Macau: different ISPs, my server with LibreSpeed, my server with iperf. I found that I only get good speeds when I use multiple connections: multi connection feature on Speedtest.net, iperf with LOTS of parallel streams.

Continue reading "Transferring file over high-bandwidth, high-latency link - bbcp"


跳出原有的安排,寫個短篇。最近發現了 Radio Mobile 的軟件,原為業餘無線電愛好者的工具,但其電腦版本亦可用作電視發射站的覆蓋範圍分析。由於軟件已經極度過時,操作極為不方便,也不見得是最好的選擇,故不詳細介紹。

在此向 Radio Mobile 開發者 Roger Coude (VE2DBE)、全球地形圖 ALOS World 3D-30m (AW3D30) 提供者日本宇宙航空研究開發機構 (JAXA) 及 OpenStreetMap 貢獻者致謝。


Continue reading "澳門公共天線的前世今生(三):香港慈雲山的覆蓋範圍"




Continue reading "澳門公共天線的前世今生(二):曾經使用的頻道來源"


小時候一直記得兩件事情:大家都説翡翠台是1台,亞視是2台,但家中的電視的1台卻不是翡翠台;比起香港人,澳門人很幸福,有那麼多的電視台可看,而香港卻只有四台。即使是後來出現了數碼電視,也是澳門人因為公天公司比香港更快人人看到數碼電視,不用等待安裝發射站,甚至不用買機頂盒,因為公天公司早已準備好將數碼頻道轉為模擬相關資訊。這也導致當時我們一直不解81和85台分途廣播時的81, 85是什麼意思。

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翡翠台與高清翡翠台分途廣播的提示。第一次看到這個畫面的時候我是感到非常疑惑的,電視機既沒有顯示81, 85台,高清翡翠台也沒有顯得比較高清,後來才知道我們在看的是公天公司轉換的模擬信號。連結: https://www.youtube.com/watch?v=ykCAsTsplKw



Continue reading "澳門公共天線的前世今生(一):引言、現有頻道來源"

This is why I prefer Linux

If you do not know yet, the Japanese standard computer keyboard has quite a few more keys than US/other European keyboards that we are used to. Whether there is a point doing so or not is a topic for another time (assuming I am knowledgeable enough to have a proper discussion), but one thing I know for sure[1] is that on Linux you can remap any keys on your keyboard to any other key supported by the system, meaning you could change those keys on the right side of the spacebar that you never use to something you might use! So I did what every reasonable person would do and spent 5 hours last night, from midnight to 5am figuring it out.

And then I can't use the Enter key anymore.

I mistyped 66 (Caps Lock) as 36 (Enter),,,
Continue reading "This is why I prefer Linux"