2010年8月23日星期一

(轉)全球氦存量 30年內用光-Yahoo!奇摩新聞

全球氦存量 30年內用光

更新日期:2010/08/24 04:11

〔編譯魏國金／綜合外電報導〕諾貝爾物理學獎得主、康乃爾大學物理學教授羅伯．李察森警告，全球氦存量以無可抵擋的速度耗竭，並可能在二十五至三十年內用罄。

批美低價售氦應提高價格回收再利用

他要求美國當局重新考慮其一九九六年通過的相關法案，根據該法，位於德州阿馬里洛的美國國家氦儲存局必須在二十年內，也就是二○一五年前售盡其持有的氦資源，以償還存氦的耗費。這項法律導致氦以越趨低廉的價格售出，並使循環再利用不符經濟效益。

美國是全球最大的氦儲藏國，全球約八十％的氦儲藏於美國西南部，而上述措施使氦以令人震驚的速度減少。氦是無法再生的惰性氣體，更是全球使用量最大的惰性氣體，它是核磁共振造影掃描器的重要冷卻劑，美國航空暨太空總署（ＮＡＳＡ）以氦氣清洗火箭的燃料槽，而液態氦則被用來冷卻核子反應爐與太空望遠鏡，甚至反恐也少不了氦，因為氦可用於輻射偵測器上。

一旦沒了也無法用化學方式製造

李察森指出，氦一旦用罄，將沒有辦法予以取代，因為氦無法用化學方式製造，地球上的氦來自岩石的放射性α衰變。他說︰「從空氣取得氦目前經濟上不可行，因此須仰賴從岩石中抽取出氦，但若這完全用光，我們必須從空氣中取得氦，相關成本將是現今的一萬倍。」氦氣是所有氣體中最難液化的，也是宇宙第二輕的元素。

美國主要從天然氣析取出氦，而獲取更多氦的唯一方式則是從超重氫「氚」的衰變中取得，但一九八八年美國禁止使用該法。

李察森抨擊美國低價出售氦的政策，他認為氦價應提高二十至五十倍，以讓氦的回收再利用有其價值。而終極解決之道就是讓氦的自由市場普遍化，若是如此，兒童派對常見的充氦氣球將價格不菲，一顆氣球恐要價一百美元（台幣約三千兩百元）。

(轉)PYTHON+RS232基礎篇 - 水瓶天賞自動化科技BLOG - Yahoo!奇摩部落格

PYTHON+RS232基礎篇 - 水瓶天賞自動化科技BLOG - Yahoo!奇摩部落格:

PYTHON控制rs232必須引用第三方的庫,我們使用Pyserial,當然還有其他的第三方庫,我有機會再慢慢研究

首先要下載Python for Windows extensions 選擇適合你Python的版本吧 Python2.5就選2.5的,安裝檔點下去自動安裝

http://sourceforge.net/project/showfiles.php?group_id=78018&package_id=79063&release_id=449591

再來是Python Serial Port Extension 選擇Pyserial串列埠rs232 另一個Pyparallel是並列埠就是以前列表機的...這箇解壓縮後,點setup.py,會幫你裝好

http://sourceforge.net/project/showfiles.php?group_id=46487

然後安裝.....這樣就能控制rs232,Pyserial只要是利用windows本身的東西在控制,所以你沒裝第一個東西就會抓不到某些模組,我也是看了好多文章,總算讓我找到一個討論區有說該怎麼做

硬體最簡單的就是把rs232 2-3腳短路,看過我網站上的rs232通訊資料應該更清楚

import serial ...當然要引用模組

ser = serial.Serial(3) #設定通訊口
print ser.portstr #check which port was realy used 確認通訊口是否ok
ser.write("hello") #write a stringser.close() 送出一個hello
self.textCtrl1.Value = ser.read(5) #收5各字元
ser.close() #關通訊口

ser = serial.Serial(3) #設定通訊口,這各部份要注意,通訊口是從0開始計算的,所以通訊1的位置要變成0

本人電腦怪怪的,雖然我的nb有com1,但實際上是com4,我用vb6可以直接控制com1,但是其他軟體,則必須轉到com4...傷腦筋

目前遇到的問題:在vb的情況下,會有兩種傳輸格式,一種是TXT一種是BIN,TXT基本上上面的方式就ok,但是在modbus的狀況下,必須使用Bin的方式,目前還在研究

(轉)于美人預知2012年人類大滅絕？　「藍色星球小孩」救地球-Yahoo!奇摩新聞

于美人預知2012年人類大滅絕？　「藍色星球小孩」救地球-Yahoo!奇摩新聞:

更新日期:2010/08/23 15:06 WEnews公民記者糖果小俠／台北報導

今年以來，全球災難頻傳，氣候、生態、不明光點、不明巨響…等等的極端的異象不斷，並造成眾多傷亡，2012年的世界末日之說，因而讓許多人更加深信不疑，8月20日超視新聞挖挖哇節目中，于美人透露，「藍色星球小孩」將拯救地球。
于美人指出，他所認識的高人表示，從2010年往前推18年（即1992年），地球誕生了一批「藍色星球小孩」，這些小孩是第一次來到地球，特性是聰明、不太會以人類方式溝通、沉膩於高科技產品，他們來地球的目的是為拯救人類。
根據高人的說法，上帝雖然派了「藍色星球小孩」到地球，讓人類免於在2012年毀滅，但由於地球超載，正常狀況只能容納35-40億人口，因此2012年時，地球仍舊要「少一半」人，也就是每2人，就有1人會被淘汰，中箭率極高。
萬一地球真的有「2012」，並有50%人口死亡，想必到時候會是「死人一了百了」、「活人收拾殘局並承受悲慟」的局面，死的一半與活的一半，那一半的人才算真正的幸運兒呢？也許一了百了的那一半還比較幸運吧！［來和公民記者交流討論：http://wenews.nownews.com/news/22 /news_22197.htm］
由於貧富差距過大、生活壓力讓人喘不過氣、心理影響生理、環境污染….等因素，造成許多國家都有「生育率」過低的現象，許多人想生又生不出來。是否人類的基因已經嗅到「災難」氣味，而自動降低生育能力？或2012年後的地球重整工作太困難，影響「藍色星球小孩」來地球的意願，進而使很多人不孕？這都是值得更深入探討的議題。

2010年8月18日星期三

(cite)Firefox keeps sending me to api.mybrowserbar.com, and there is now a white square underneath my pointer

Firefox keeps sending me to api.mybrowserbar.com, and there is now a white square underneath my pointer:

Firefox keeps sending me to api.mybrowserbar.com, and there is now a white square underneath my pointer

Firefox version: 3.6 Operating system: Windows XP

作者

訊息

Ryan
Firefox user

Issue

Firefox is having problems with certain web sites

Description

How can I correct this? And is this a sign of malware on my computer?

URL of affected sites

http://

Firefox version

3.6

Operating system

Windows XP

User Agent

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 GTBDFff GTB7.0

Plugins installed

[+]

四 18 of Feb, 2010 19:54 PST #

CrankyBeach
Firefox user

I got rid of it... the culprit was something called "Search Settings 1.2.3". And I'm not sure where and when I picked THAT up... but going to control panel and add/remove programs, and removing "Search settings 1.2.3" has made the mybrowserbar hijack go away.

日 23 of 五月, 2010 20:49 PST #

This answer solved the problem.

Anonymous

How do I remove this default search provider in Firefox!?

使用網址列輸入中文收尋的時候，出現的是百度網

小無：Firefox 網址列被綁架成百度，移除Plug-in:Search Settings 1.2.3，就OK。

(轉)在網址列上打中文會跑到百度搜尋去要怎麼移除？

在網址列上打中文會跑到百度搜尋去要怎麼移除？:

小歐ouMVP, 版主

登入以投票

Hi!

我試著安裝您提供的 http://bar.baidu.com/banlv/index.html

在新增/移除中沒有辦法找到百度與移除

我測試過後，比較快的解決方式請參考下圖作重設，之後就會變成之前說的以搜尋提供者

2010年8月12日星期四

(Cite)In pictures: Luntik, the amazing 4-eared cat | Mail Online

In pictures: Luntik, the amazing 4-eared cat | Mail Online:

Let's hear it for Luntik: The amazing cat with FOUR ears

By Mail Online Reporter
Last updated at 12:14 PM on 11th August 2010

The brief Seventies craze for quadraphonic sound might have lasted a little longer if there were more cats like Luntik around.

The three-month-old kitten who lives in a garage in Vladivostok, Russia, has a 'spare' pair of vestigial ears just in front of his real ones.

It's not a completely unique condition. There's a cat called Yoda living in Chicago with an even bigger pair of spare lugholes.

Raspberry: Luntik gives his reply to anyone who says he looks a bit odd.

Two? Hah! I've got four... Luntik gives his reply to anyone who says he looks a bit odd

Well that takes the biscuit: A stunned dog catches sight of Luntik, the kitten born with an extra pair of ears

I'll be dog-gone: A stunned dog catches sight of the kitten, who lives in a garage in Vladivostok, Russia

Unlike the widespread reports of 'winged cats' - which are usually just the result of wishful thinking and extremely matted fur - Luntik really does have a fully formed extra pair of ears.

However, they don't have any of the internal 'plumbing' that would actually make them workable.

Best leave those old Pink Floyd LPs up in the loft then.

Luntik's second pair of ears are purely 'decorative' as they have no ear canals

Two too much: Luntik's second pair of ears are purely 'decorative' as they have no ear canals

20th August, 2008

Meet Yoda the four-eared cat

As hearing aids go, they don't come better than this. Meet Yoda, the two-year-old moggie who was born with four ears.

2010年8月3日星期二

超新手的Python 3.1筆記

Python 3.1

1. print為一個function，要用print()，基本的數值處理，example

a = 2

b = 3

a*b

print(a+b)

2. string index是從0開始，且不能修改(重新assign)example:

word = 'Help' + 'A'

則

word[0:2]

'He'

word[0:]

'HelpA'

word[:3]

'Hel'

string index可以是負值，此時從右方算起，例如:

word[-1]

'A'

word[-2]

'p'

word[:-2]

'Hel'

3. List index也是從0開始，且可被修改，example:

a = ['spam', 'eggs', 100, 1234]

['spam', 'eggs', 100, 1234]

a[0]

'spam'

a[-2]

100

a[0] = 'cool'

['cool', 'eggs', 100, 1234]

List中的元素也可以是List，例如

q = [2, 3]

p = [1, q, 27]

[1, [2, 3], 27]

p[1]

[2, 3]

詳參：

http://docs.python.org/py3k/tutorial/introduction.html(英文)

2010年8月2日星期一

(cite)Linux Update: Full OpenGL 3D Acceleration for Xen/Vmware/Kvm

Linux Update: Full OpenGL 3D Acceleration for Xen/Vmware/Kvm

Monday, July 9, 2007

Full OpenGL 3D Acceleration for Xen/Vmware/Kvm

Source: Thoughts on the Virtualization area.

With all the news about Vmware Fusion and Parallels upcoming 3D acceleration capabilities there hasn't been much about the free software projects work in this area.

Introducing VMGL, which provides OpenGL Hardware 3D Acceleration for Virtual Machines. It is a program that you install in both the host and guest and allows for virtualizing the OpenGL functions. When tested in xen with Quake 3 & Unreal Tournament 2004 it provides for up to 87% of the performance of the native implementation. It has been tested under vmware and xen but it should work under any of the other virtualization solutions out there. (kvm, qemu, virtual box)

This is major news for the virtualization field as 3D acceleration has been the one area where there has not been much progress. As this is a generic solution released under a BSD licence it can be incorporated into any of the current virtualization solutions. Also it is gpu independent and will work with any OpenGL accelerator.

Related:
VMGL Homepage
Xen summit Slides

2010年8月1日星期日

(cite)How to Create a Transparent Background in Photoshop

How to Create a Transparent Background in Photoshop:

Making the Transparent Area

Using the magic wand or lasso tool, select the area of the image you want to be transparent.

You may want to experiment a few times with the tolerance and anti-aliasing settings to get the best selection. In the example shown here, the following Magic Wand settings were used:

Hit the Delete button. The selected area is removed and the checkered (transparent) background becomes visible.

Now that you have a transparent background you can save the file in a variety of formats, including GIF, TIFF, PNG and of course PSD.

Notes:

JPG format does not support transparency.
If you find ugly edges around the image when you place it against a different background colour, see this solution.
If you have any questions please ask in our Graphics Forum.

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