Monday, December 31, 2012

Cover Disappeared When Converting Epub to Mobi

When I convert ePub book to mobi format using Calibre and view in Kindle for PC, the cover does not show up. I found this thread  which mentioned about the workaround. Tried it and worked. In the Conversion dialog box, select MOBI Output and enable sharing like the figure below.

Sunday, December 30, 2012

Delete Multiple Personal Documents from Kindle Library

Amazon let you delete Personal Documents one by one. And it takes a lot of time waiting for refresh. I found a workaround from this thread :

Basically what you have to do is :

1. From Manage Your Kindle page, select Personal Documents (important : you have to select this for the script below to work)
2. Search or filter until you get the result list you want to delete
3. Use the following Javascript. In my case, I used Chrome and went to Menu --> Tools --> Javascript Console

javascript:(function(){ var v = new RegExp("PersonalDocuments"); if (!v.test(document.URL)) { return false; } {a=document.getElementsByClassName('rowBodyCollapsed');for(var i = 0; ietAttribute('asin'));};return; }})();
4. Enter and wait until the page refreshed. And all the 15 entries deleted.

Though not completely what I wanted but this is better than doing it one-by-one

Tuesday, December 25, 2012

Turning Off Apple Wireless Keyboard

To turn off your keyboard:
Press and hold the On/Off switch located on the right side of the battery compartment for at least three seconds. The LED indicator turns on when you press the button and turns off when the keyboard has turned off.

Monday, August 13, 2012

1and1 & Google App Verification

1and1 does not support adding of TXT record. Workaround by set your name server to and then add TXT record there. Once verify you can change the name server back. Instruction here ->

Thursday, June 28, 2012

Femto Cell

Femtocell กระจายสัญญาณมือถือให้บริเวณระยะหลัก 10 เมตร แล้วใช้ Broadband internet ส่ง Voice และ Data ที่ใช้ผ่านมือถือกลับไปยัง HNB Gateway (Home Node B) เพื่อคุยกับ Network ของ Operator มือถือต่อไป

Pico หลัก 200 เมตร

Micro น้อยกว่า 2 กิโลเมตร

ที่ AT&T เคยมีปัญหาพูดกันว่าใช้ได้ดีกับบริเวณที่มีสัญญาณอ่อน แต่ถ้าไปใช้กับบริเวณที่มีสัญญาณแรงจะมีการกวนกัน
Sprint มี Deploy เยอะเหมือนกันใช้ชื่อว่า AirRave

Thursday, May 24, 2012

Gaining back space with DISM

I follow this
by doing the following in cmd windows (run as admin)
dism /online /cleanup-image /spsuperseded /hidesp
and gain back about 4GB. I don't need to uninstall windows 7 sp1 so had not problem doing this.

Sunday, May 13, 2012

Colorless, Directionless, Contentionless and Gridless ROADM

Colorless, Directionless, Contentionless ROADM หรือบางทีเรียกว่า CDC เป็นคุณลักษณะของ ROADM รุ่นใหม่ๆที่มีความสามารถในเรื่องของการ Add Drop Wavelength ที่มีความ flexible มากขึ้น โดย Colorless หมายความว่า Wavelength ที่ drop ออกมาแต่ละ slot นั้นสามารถเป็นสีอะไรก็ได้ ไม่ fixed wavelength ตาม slot แบบในสมัยก่อน ทำให้สามารถใช้ software เลือก wavelength ที่จะ drop ไปที่แต่ละ slot ได้ ทำให้ใช้ประโยชน์จาก tunable transponder ได้อย่างเต็มที่ อันต่อมาคือ Directionless คือแต่ละ slot ที่ drop wavelength ออกมาสามารถ drop ออกจากทิศทางไหนก็ได้ และสุดท้ายคือ Contentionless หมายความว่า แต่ละกลุ่มของ slots ที่ drop สามารถเป็น wavelength อันเดียวกันได้ (add/drop ออกไปคนละทิศทาง) ไม่ถูกจำกัดด้วยข้อจำกัดของ architecture ของ WSS ที่ห้ามมี wavelength เดียวกันเข้าไป ซึ่งอุปกรณ์หลังๆนี้ก็จะใช้ OXC มาช่วยในการ drop ทำให้ add/drop wavelength เดียวกันได้ ตราบใดที่ไปคนละทิศทาง
ส่วน Gridless คือสามารถใช้ bandwidth ได้อย่าง flexible ไม่ถูกตีกรอบด้วย ITU Grid เช่นที่ speed สูงมากๆ เช่น 40Gbit/s, 100Gbit/s อาจจะต้องใช้หลาย channel มารวมกัน

มีบางคนแนะนำว่าแทนที่จะเรียกลักษณะต่างๆเหล่านี้ด้วย -less ควรจะเป็น Colorful, Multi Direction, Nonblocking และ Adaptive Channel อะไรประมาณนี้มากกว่า ซึ่งผมก็ค่อนข้างคล้อยตาม

Carrier Ethernet Certification 2.0

MEF9, MEF14, MEF18 เดิมจะเปลี่ยนเป็น Carrier Ethernet Certification 1.0 (CE 1.0) ส่วน CE 2.0 จะเน้นสามเรื่องคือ MultiCOS, Interconnect และ Service Management และจะประกอบไปด้วย Service หลักๆคือ E Line, ELAN, E-Tree และ E-Access โดยแต่ละอันมีสองส่วนคือ Physical Channel และ VLAN based ทำให้มีทั้งหมด 8 Services

Study more at

Thursday, April 26, 2012

Good Summary of Electricity Utility Control Systems

Two major, complex real-time control systems monitor and control the power system at this Utility: the transmission Energy Management System (EMS) and the Distribution Management System (DMS). There are many applications within EMS; however one of the main functions is Supervisory Control and Data Acquisition (SCADA), which scans data from (or sends control to) the field devices via the Remote Terminal Units (RTUs) through the master station equipment or Front-End Processors. The EMS and DMS systems are primarily used for real-time operational purposes and are not intended for long-term data storage.

Monday, April 9, 2012


To convert UIF image to ISO image which can be mount by Alcohol, you can use uif2iso tool developed by Luigi Auriemma. Download the tool here There are also a lot of other useful tools there.

Thursday, March 29, 2012

Use Gmail to get POP3 and enable IMAP

I now use Gmail to get my work mail from POP3 server and serve to my Thunderbird via IMAP. I labeled mail from POP3 as "Work". I can now view gmail and work mail together. IMAP is also convenient as it doesn't matter how many clients you have, they are all synced to GMAIL. You have all your mail in the cloud. When you have to change the PC/Notebook, just install the client and sync. No need to copy .pst file or things like that.
One thing I need to get used to is the concept of "Label" which is not the same as "Folders". But I think it has its advantages. Here's how I structured my "label"

You can drag and drop mail to different labels but when you drag mail out from the list, the label used to show that list also get removed, but not other labels. Just have to be aware of this.

Friday, March 23, 2012

Create RSS Feeds from any Web Site

Feed43 is the most flexible and let you control where and how to extract contents and turn into RSS feeds when compared to others. Highly recommended.

Saturday, March 17, 2012

Diagram Showing News Delivery to my Kindle and iPad

Making use of feedstitch,, Readability, Instapaper and SENDtoREADER. Byline on iPad is highly recommended due to its caching capability. I used to draw this. Very convenient.[Updated:April 17,2012] feedstitch is down. I now add tasks into to send new feeds to Readability directly. You can add multiple feeds, so no need to combine using feedstitch first.

Wednesday, March 14, 2012

Google Reader to Kindle

1. is almost the perfect choice. You can set schedule, specify which folder in Google Reader, how many post to send. But it does not support images and does not fetch the full content.
2. SENDtoREADER. I found that it does not fetch the correct content. For example some content on sidebar not related to main article got fetched and mixed in with the main articles. I compared this to the way Readability fetched this correctly. Unacceptable.
3. Kindlefeeder does not get the whole content and does not send images or sometime send wrong images

So far I got perfect contents with images on Kindle from Readability. Just need to find a way to send feeds automatically to Readability so that I can set schedule to send the list update to Kindle from Readability. I think I'm going to use to do this. I can create multiple tasks in with each one correspond to one rss feed and send its update to Readability. Another way is to combine all rss feeds first using which is pretty easy to use or using Yahoo pipes which is amazingly flexible. So here is the services I'll be using:

Monday, March 12, 2012

Kindle It versus Send to Kindle

I feel that "Kindle It" from sends better format than "Send to Kindle" from Both are very useful.

Sunday, March 11, 2012

Google Reader and Readability

I was looking for a beautiful news reader that I can use on PC, something similar to flipboard on iPad. I also want to be able to send the lengthy news to another app like the Instapaper or Readability so I can read it easily with a clean layout. Another feature I wanted was "Send to Kindle". Below are News Reader that I like. All of them support browsing for news/feeds to be added to your channel.

Supported Apps 
for Read Later
Read It Later
Beautiful, Magazine-like
No Web-based
Read It Later
No Web-based


Similar to Flipboard
No Web-based
None Row at the bottom
Clean Content Layout
Support both Mobile and

Only Layers/Persona has the corresponding web-based for PC. But it does not support sending to Instapaper and Readability. I should also mention that Instapaper can only send the whole updated list to your Kindle, not selectively per article. Readability can do that with a more modern interface. Instapaper can send upto 10 articles for free version. If you subscribe for 1$ a month you can get upto 50 articles to be sent to Kindle. Readability does not seem to have this limitation. The 1$ is not an issue for me. But when I send list of articles to Kindle from Instapaper, the images were not included while Readability did not have this problem. Another service "ReadItLater" does not support "Send to Kindle".


So I have to go back to Google Reader as my news aggregator and reader. I added in Google Reader a custom "Send To" services to Readability following the instruction here
Icon URL:

Icon URL:
I also make the style of Google Reader cleaner using the Chrome extension called "Stylish" and download the "Minimal Readable Expanded" style to apply to the Google Reader.

The Google Reader then looked like this with hidden navigation pane on the left (it appears only when you move your mouse there)

That's it. So Plain old Google Reader on PC and Pulse on iPad/iPhone. With Readability to read with a clean layout and send update to Kindle every morning.

Forgot to mention that Feedly does not have Readability built-in yet. That's the only one reason why I have to still use Google Reader. Feedly is very good looking wrap around Google Reader. I'll use it once it has Readability connection.

[Updated : Mar 18, 2012] I used "Super Full Feeds" extension for Chrome to get the full articles for truncated rss feeds. But later I found that it does not get articles correctly from some sites such as Gizmodo. Send to -> Readability worked find. Then I found "Reader Plus" extension which support the same thing but use Readability engine. It also support themes and many other things. I can now remove both "Stylish" and  "Super Full Feeds" and only use "Reader Plus" now. Working perfectly so far.

Wednesday, January 18, 2012

When Autonegotiation Fail

Autonegotiation เป็น protocol ซึ่งจะ work ก็เมื่อทั้งสองฝั่ง set เหมือนกัน ถ้าไม่เหมือนกัน ฝั่งที่ set เป็น auto ก็จะ fall back ไปสู่ parallel detection mode คือจะส่ง frame ที่ได้ทาง Rx ให้กับ driver ของทั้ง 10Mbps, 100Mbps และ 1000Mbps แล้วเลือกอันที่ดีที่สุด แต่ parallel detection ไม่สามารถ check duplex mode ได้ จึงมักจะ set duplex mode เป็น default ที่ safe ที่สุด ซึ่ง default ของ 100Mbps ก็ยังคงเป็น half อยู่ จึงทำให้เกิดปัญหา network ช้าขึ้น ดังรูปด้านล่าง

Friday, January 13, 2012

Cannot Run eFilmLt.exe from CD

Found the solutions from this blog

Reading CT scans with eFilmLT.exe on Vista
A bit off-topic but I thought I’d share. A friend of mine had this CT scan on CD and was having trouble reading it on his PC (sometimes it worked, sometimes not). And simply copying it to his hard disk enabled it unreadable. So I offered to debug why, and lo and behold, a quick Google search shows that lots of other people have reported similar problems (e.g., see here).
It seems that this proprietary reader (eFilmLT.exe), made by Merge Software, looks for a valid binary “DICOMDIR” file that points to the metadata for the particular scan images on the CD (e.g., the patient name, date taken, image filenames, etc.). Why this isn’t a human-readable format like XML, I have no idea.
Anyway, if you have a set of images that you can’t read:
  1. copy them to your hard disk
  1. download the attached zipfile, which contains all the relevant reader files (e.g. ,eFilmLT.exe, associated DLLs, “Profiles” directory, and configuration files). All these are (I think) independent of the particular CT scan on a given CD. I have *not* included “DICOMDIR” here by design.
  1. Overwrite your files with the contents of this zipfile.
Then try to launch the new eFilmLT.exe. It should pick up your DICOMDIR and now you can read your CT scans. This has been tested on Vista, probably XP works as well. Good luck.
And I copy the zip file here just in case.