2012/09/28

Blooper: Futuristic Watch Syncing/未來對錶

Blooper: Futuristic Watch Syncing/未來對錶

In the beginning of Appleseed Ex Machina, before an assault by the ESWAT team, the team leader asks the members to synchronize their watches on his mark. I wonder when, how, and what the heck do they need to sync their watches manually.

More than a century before the era of Appleseed, my watch synchronizes with atomic clocks over radio waves,

Wikipedia: Watch

Radio time signal watches are a type of electronic quartz watch which synchronizes (time transfer) its time with an external time source such as in atomic clocks, time signals from GPS navigation satellites, the German DCF77 signal in Europe, WWVB in the US, and others.


my cell phone network, and computers NTP servers.

Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.


Since all of my time pieces synchronizes with atomic clocks automatically, today, I have no need to sync any of them at all. I wonder why the heck ESWAT needs to manually sync their watches a century later.

在電影蘋果核戰:機械人的背叛開頭,在ESWAT攻堅前,隊長要求隊員在他的指示下對錶。零北很好奇:現在的同步科技死哪兒去啦?

在蘋果核戰一百多年前的今天,零北的手錶經由無線電波跟原子鐘同步,

電波時計, 電波時計的生命在於內藏一個具有極端精確的電波接收器(天線),能每天自動接收由日本基地台發射出的「標準時刻」電波,自動校正時刻及日曆。由於基地台的 時計是用稀有的銫(Cesium)原子所製,所以能幾乎永久都保持在標準時刻。一般手錶每個月都會有 ± 15秒的誤差,但是電波時計卻擁有10萬年只誤差1秒的驚人效能。起初,為了發揮功能,電波時計有很多奇異的設計,例如外接天線、後底蓋陶瓷材質等……


手機跟手機網路同步,電腦跟網路上的NTP伺服器同步。

網路時間協議英語Network Time ProtocolNTP)是以封包交換把兩台電腦的時鐘同步化的網路協議。NTP使用UDP123作為傳輸層。它是用作抵銷可變延遲的影響。


既然零北所有的時計都自動與原子鐘同步,零北就沒有對時的必要。零北很好奇:為蝦米一百多年後的ESWAT還要手動對錶?

延伸閱讀/Related Article:

free counters

No comments:

Post a Comment

Related Posts with Thumbnails

Popular Posts (All Time)/滿堂紅

Popular Posts (7 Days)/七日紅