PTU NOTES

what is name of my pc ???

2011-09-05T06:55:00.000-07:00

You can easily get the name of your pc:

Step 1-open cmd or MS-DOS.
Step2-Type command ipconfig/all and press Enter Key.

You will get whole information about your PC.

When face recognisation does not work!

2011-08-05T09:38:00.000-07:00

Not to worry ; it some time happens the simple solution is you have to choose both login screens such as face detection and also username/password screen.Some this will happen because of light detection in the screen ,if you have save your settings at morning the detection may fails in the evening so the better solution is that use both screen.As envioronment changes affects the light also ,so straight your face infront of webcam.

For more solution follow these steps :-
1)Press window button and r (window+r).

2)Run window open.

3)Add cmd in the text box to open command prompt.

4)Cmd prompt window open.

5)Type explorer as command and press enter.

6)The Window Explorer open.

How to make symbols by letters and numbers ?

2011-08-04T22:37:00.000-07:00

You can use various symbols in word processor ,text editor,browser or in your email.

The steps are here below :
1)Make sure your keyboard Num Lock should be ON.
2)Hold Altr key and press number for your desired symbol.
For☺ press 1
For ☻ press 2
For ♥ press 3
For ♦ press 4
For ♣ press 5
For ♠ press 6
For • press 7
For ◘ press 8
For ○ press 9
For ◙ press 10
For ♂ press 11
For ♀ press 12
For ♪ press 13
For ♫ press 14
For ☼ press 15
For ► press 16
For ◄ press 17
For ↕ press 18
For ‼ press 19
For ¶ press 20
For § press 21
For ▬ press 22
For ↨ press 23
For ↑ press 24
For ↓ press 25
For → press 26
For ← press 27
For ∟ press 28
For ↔ press 29
For ▲ press 30
For ▼ press 31

Artice on internet become important!

2011-08-03T09:56:00.000-07:00

Using internet is now a need may because of increasing speed of technology so when i was so young i use internet and i remember the opening new tab increase difficulty for me.but with increase in time and increase in competion with others increase the use of internet which become very important. Now days internet is very important mostly available in every electronical technology such as smart phones.

From news surveys it has been concluded that the use
of internet become 17% more as compare to last year
due to use of smart phones and tablets.

ATT or Direct TV ...which is better?

2011-08-03T09:18:00.000-07:00

The both technology providing great entertainment from many years under the television services.Both providing services attractive prices and great features.but inspite of it some differences exists that may help to make decision.
Technology:

ATT :Coaxial cable connected to node.
Direct TV :Smart dish installed to your home.

Pricing and Programming:
ATT:Delivers more than 390 channels and 6 programming languages.
Direct TV:Delivers 285 channels and 4 basic programming languages.
*but Direct TV is better in pricing.

So Direct TV is popular because they offer sattelite internet with less cost.

When computers does not starts.

2011-08-03T02:59:00.000-07:00

When computer does not starts normally or in safe mode you need to reboot it using the sae operating system .This may repair your existing OS known as Recovery Console.

Follow the solution:

Insert the OS (XP) into CD-ROM drive.
Press the Ctrl+Altr+Delete to reboot.
The screen display as :


Recovery Console Screen

Press R to start recovery console.
The recovery console screen displayed above.
Now just press the menu number on the keyboard, and you will be prompted to enter the Administrator's password. You'll then find yourself at the main Recovery Console prompt.

Don't use power saver mode.

2011-08-03T00:54:00.000-07:00

Don't use power saver mode it reduces the battery life..and while heating use cool pads for laptop.
How to cool your lappy !

Take a look at your laptop ,the elements that heat up are processor and power supply unit ; may they are placed at different locations so different placement of cooling fans are required.

Follow various steps to make your own cooling pad.

1) Start by cutting acrylic sheet as same the size of your laptop as base of it.

2) Cut out circular pieces to allow air to flow.

Its a demo you have to cut only circles through which air blow and use full acrylic sheet as same as laptop size.

3) After cutting pieces , fix fans and wire them using USB .

4) For balancing sheet add wooden pieces at corners .

Some precautions:-

Do not remove protected sheet to avoid cracks and scratches.
Two 5V fans are sufficient for basic laptop.
Use male connector USB wire and shield its one end.
Connect the fan between shielded wire and pin 1 at the same end.
Now cooling pad is ready to use.

Normalisation in rdbms

2011-08-02T11:57:00.000-07:00

In relational database management system , normalisation is a concept in which database is managed in a way to reduce duplicay(redundancy).Normalisation involves dividing of larger tables into smaller tables mainly to reduce redundacy.
So five NF(normal forms) were developed for solution.

Edgar F Codd developed 1 NF ,and he was the first inventor of relational database .With need other NF developed.But before to study NF some terms may you know are as follow:-

Functional dependency: In relation R ,X is an attribute which is functionally dependent on Y.
That is X→Y .

Example:

Student Id	Student Sem	Lecture Time
101	6	1:00A.M.
101	4	3:00P.M.
101	6	2:00P.M.

In this Student Id → Student Sem ; means every value of column 1 is associated with precisely one value of column 2