Bộ môn Giải tích


Sư tử và thỏ – from Blog Khoa học máy tính

Filed under: Không toán học, Toán học, Trao đổi, Vui chơi — doanchi @ 23:43


Câu chuyện sau đây, không biết từ đâu ra, rất phổ biến trong đám sinh viên sau đại học. Hay và có nhiều ý nghĩa.



Tiếng Việt và Tiếng Anh – Mỹ

Filed under: Không toán học, Trao đổi — doanchi @ 04:08

Hôm qua tôi nhận được một bài viết rất thú vị về tiếng Việt Nam ta so sánh với tiếng Anh. Mọi người cùng đọc nhé.


Three Security Council members elected but two more seats still up for grabs

Filed under: Toán học — Ngô Quốc Anh @ 01:06

16 October 2007 The General Assembly today elected Burkina Faso, Viet Nam and Libya to serve as non-permanent members of the Security Council for two-year terms starting 1 January 2008.But two other non-permanent seats, awarded to one Eastern European country and one member of the Latin American and Caribbean States grouping, remain in contention after no nations were able to obtain the necessary two-thirds majority during the first round of voting this morning.

Announcing the results of the first round in the African and Asian category, where three seats were available, General Assembly President Srgjan Kerim said Burkina Faso had received 185 votes out of a possible 190, while Viet Nam picked up 183 and Libya received 178.

The three countries – which replace Congo, Ghana and Qatar when their terms expire at the end of this year – were the only declared candidates for the region. Mauritania picked up two votes, Senegal received one and there were no abstentions.

In the Eastern European category, where 124 votes were needed for victory, Croatia received 95 and Czech Republic picked up 91. There were four abstentions.

In the Latin American and Caribbean grouping, where 126 votes were needed to win, Costa Rica obtained 116 and the Dominican Republic received 72.

Balloting for both groupings will continue until the required majority is achieved, with the next three rounds restricted to the two highest-scoring candidates in the opening round. The winners will replace Slovakia and Peru when their terms expire at the end of this year.

The members were elected according to an agreed geographic allocation, which awards three seats to African and Asian countries, one to Eastern European States, and one to the Latin American and Caribbean region during this year’s round of elections.

Council elections are held by secret ballot in the General Assembly, and a winning candidate requires a two-thirds majority of ballots of members present and voting. Formal balloting takes place even in those regions where there is only one candidate per available seat.

The Council’s five other non-permanent members, whose terms end on 31 December 2008, are Belgium, Indonesia, Italy, Panama and South Africa. The five permanent members are China, France, Russian Federation, United Kingdom and United States.



Filed under: Không toán học, Toán học, Trao đổi — doanchi @ 16:55

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Symbian Series 60 FAQ

Filed under: Toán học — Ngô Quốc Anh @ 16:54

This is a little Series 60 FAQ.
Series 60 is an User Interface (UI) for Symbian OS.

It is based on my experience with Symbian OS phone with Series 60 I had (Nokia 3650/6600/6630/N-Gage QD, Siemens SX1) and of what I’ve learned through research on the net. Most common S60 phones are considered.

This tips & tricks should work on all phone models with this UI.


Q: Can Nokia Series 40 Games be played on Series 60 phones?
A: Yes, but they won’t be in fullscreen. The game will remain in their original programed size.

Q: I’ve bought a cable for my Nokia 3650/7650/6600 but it won’t work. Why?
A: There are no data-cables. These cables are only for service needs and are not capable to transfer data to your phone. The 7610 is the first Symbian OS phone of Nokia which can use a cable (besides of the Communicator – but they are a different story)

Q: Where are my messages saved?
A: If your phone saves them within the phones memory they are in c:\system\mail. If they are saved on the MMC (not on all S60 phones possible) they are in e:\system\mail

Q: I’ve formatted my MMC with a card reader, now I can’t access the card with my phone. What now?
A: You’ve formatted it with the wrong file system. If you want to reformat it with the card reader, choose FAT16 (or only FAT – depends on how you OS calls it) as files system, not FAT32! Or reformat the MMC with your phone, this way all standard folders will be created too.

Q: How can I copy & paste text?
A: Press and hold down the pencil key (on Siemens SX1 it’s the big arrow up button). Now you can mark the text by using the direction key. To copy, just press “copy”. To insert the text press and hold down the pencil key and press “paste”

Q: Where to put my ringtones?
A: Ringtones should be stored in the “Sounds” folder on your MMC or within the phones memory. You can, if you want, sort them into the two subfolders “Simple” and “Digital”.

Q: How do I install an app/ a game?
A: There are many ways.
Nokia PC Suite bounds sis-files to its installer. You should be able to install them easily by double clicking on the sis-file (a connection should be made already!).
Same does the Siemens Data Suite
Or you can send it over to the phone (IrDA or Bluetooth) and open it and it will install automatically. Or you can upload it with a card reader to the MMC and install it from there by open the file. For this method you need FExplorer or SeleQ to gain full access to the MMC.
The rest will be prompted and is easy to understand.

Q: Which Symbian OS version does my phone use?
A: Nokia3600/3620/3650/3660/7650/N-Gage/N-Gage QD, Sendo X/X2 and Siemens SX1 are using v6.1
Nokia 3230/6260/6600/6620/6670/7610 are using v7.0s
Nokia 6630/6680/6681/N70/N90 use Symbian OS 8.0
Nokia N91 uses Symbian OS 9

Q: How can I upgrade my Symbian OS to a newer version?
A: You can’t.

Q: How do I format my phone?
A: The following should work on all Series 60 phones
– Normal Reset (*#7780#) : Restores ini files from rom but preserves user data (photos, 3rd party apps etc)
– Deep Reset (*#7370#) : This reformats completely the C: drive. All applications and files stored on this drive will be lost and clean default files will be rewritten.

In both case, the phone will ask you a confirmation and you will have to enter a security code (12345 by default).

Files and applications stored on E: drive are not be affected by these sequences.

On the Siemens SX1 there is also another there is also another method available. Hold down the * and the # key and turn it on.
The phone will start the formatting process without confirmation!
Files and applications stored on E: drive are not be affected by this.

There is a third method for Symbian OS 7 (or higher):
Turn phone off, press and hold the green (talk) key on the left + number 3 on the keypad + the * key and then turn the phone back on.

The phone will start the formatting process without confirmation!
Files and applications stored on E: drive are not be affected by this.

Q: How do I get the MAC adress of the bluetooth device of my phone?
A: *#2820#

Q: My phone reacts quite slow when opening the menu or starting apps, how can I speed it up?
A: You can speed up the phone by setting the time of the “Recent calls register” to one day (30 days by default). It depends on you how important the “Recent calls register” is for you.

Một tháng xa nhà

Filed under: Không toán học, Trao đổi — doanchi @ 14:37

Một tháng đã trôi qua kể từ khi tôi rời Việt Nam. Biết bao chuyện đã xảy ra, ở Khoa, ở Bộ môn, ở Trường, và ở nhiều nơi. Bộ môn Giải tích sẽ phát triển như thế nào nhỉ? Năm nay sẽ nhận hai em Huy và Tùng, vậy là mảng PDEs được bổ sung thêm một người, và mảng GTH thì chú Mạnh sẽ không còn độc hành nữa. Các seminar sẽ hoạt động thế nào nhỉ?

Mấy ngày nữa Đặng Anh Tuấn sẽ bảo vệ Tiến sĩ, vậy là Bộ môn lại sắp có một Tiến sĩ mới. Sang năm chắc là Thu. Và thêm nữa???

Chúc cho bộ môn ngày càng phát triển.

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