關於它的起源，要回溯到第二次世界大戰時期。那時的工程師和科學家們需要用二進制來標記獨立的電源按鈕、開關和旋轉切換開關，而他們通常用二進制中的“1” 代表“開啟”，用“0”代表“關閉”。1973年，國際電氣工程委員會(IEC)模糊地設定了一個在兩者之間的內循環，並命名為“備用電源狀態(standby power state)”。不過，美國電器和電子工程師學會(IEEE)的工程師們覺得這個定義太含糊不清，就將其修改並重新定義為“電源”，並設計了這個標誌。
Standby power, also called vampire power, vampire draw, phantom load, or leaking electricity ("phantom load" and "leaking electricity" are defined technical terms with other meanings, adopted for this different purpose), refers to the electric power consumed by electronic and electrical appliances while they are switched off (but are designed to draw some power) or in a standby mode. This only occurs because some devices claimed to be "switched off" on the electronic interface, but are in a different state from switching off from the plug, or disconnecting from the plug, which can solve the problem of standby power completely. In fact, switching off at the plug is effective enough, there is no need to disconnect all devices from the plug. Some such devices offer remote controls and digital clock features to the user, while other devices, such as power adapters for disconnected electronic devices, consume power without offering any features (sometimes called no-load power). All of the above examples, such as the remote control, digital clock functions and, in the case of adapters, no-load power, are switched off just by switching off at the plug. However, for some devices with built-in internal battery, such as the phone, the standby functions can be stopped by removing the battery instead.
In the past standby power was largely a non-issue for users, electricity providers, manufacturers, and government regulators. In the first decade of the twenty-first century awareness of the issue grew and it became an important consideration for all parties. Up to the middle of the decade, standby power was often several watts or even tens of watts per appliance, and amounted typically to 10% of the electrical energy usage of the average household. By 2010 regulations were in place in most developed countries restricting standby power of devices sold to one watt (and half that from 2013). Harald Bluetooth - Wiki Article
Harald "Bluetooth" Gormsson (Old Norse: Haraldr blátǫnn Gormsson, Danish: Harald Blåtand Gormsen) (probably born c. 935) was the son of King Gorm the Old and of Thyra Dannebod. He died in 985 or 986 having ruled as King of Denmark from c. 958 and King of Norway for a few years probably around 970. Some sources state that his son Sweyn forcibly deposed him as King.
"Bluetooth" now commonly refers to the Bluetooth wireless specification designed by Ericsson, the major Swedish telecommunications organization, to enable cable-free connections between computers, mobile phones, PDAs, printers, etc. The Bluetooth communications protocol in these devices is named after this king, ostensibly due to his abilities to make diverse factions communicate with each other. The Bluetooth logo consists of the Nordic runes for his initials, H and B (Long-branch runes version).
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發表於 2012-11-24 15:44:00
廣播
置頂
推舊帖
收嗲鳥
油顏色
U NON STOP....
發表於 2012-11-24 16:10:52
同乃有得比
兩樣刀巧奈矛做
