Create Own Fonts Without Any Software

1. Click "Start"

2. Click "Run"

3. Type in "eudcedit"

4. The program that pops up is a hidden font editor that lets you create your own fonts and characters to use in other programs like MS Word. 

Block Or Unblock A Website Without Software

To Block Any Of Website on Your Pc.

Do The Following : 
For eg. you want to block www.xyz.com ! 


* Open the folder C:\WINDOWS\system32\drivers\etc 
* There you will find a file named HOSTS 

* Click on the file and press SHIFT and now right click on it . 
* From the right click menu select Open with . 

* Now, select Notepad to open the file from the list ! 
* Now, in the file under the line 127.0.0.1 localhost add another line as 127.0.0.2 www.xyz.com. 

* Now, File>>Save ! 


Now, open your web browser and try openning www.xyz.com , it will not load !

Processor or Virtual Storage

· 1 Bit = Binary Digit
· 8 Bits = 1 Byte
· 1024 Bytes = 1 Kilobyte
· 1024 Kilobytes = 1 Megabyte
· 1024 Megabytes = 1 Gigabyte
· 1024 Gigabytes = 1 Terabyte
· 1024 Terabytes = 1 Petabyte
· 1024 Petabytes = 1 Exabyte
· 1024 Exabytes = 1 Zettabyte
· 1024 Zettabytes = 1 Yottabyte
· 1024 Yottabytes = 1 Brontobyte
· 1024 Brontobytes = 1 Geopbyte

TV Technologies

TV's basically come in six different flavours – Plasma, LCD, LED, OLED, CRT, and Rear Projection. While the differing technologies may sound complex, they don't need to be.

Plasma
Capsules of xenon, neon, or argon gas sandwiched between two planes of glass are chemically excited by an electrical current. When excited enough, the gas changes to a plasma, releasing light. The light strikes a phosphorescent layer which produces the required coloured light in each pixel making up the image.

The key features of plasma's are:

• They're economical to manufacture in large sizes, so really big TV's tend to be plasmas
• The have a bright image relative to other TV technologies
• Fast moving images don't blur (unlike on LCD and LED TV's)
• Their glass screens make them prone to picking up reflections in brightly lit rooms
• They are not very efficient – consuming relatively large amounts of electricity
• They are prone to image burn-in

LCD

White light from a series of cold cathode fluorescent lamps (CCFL's) at the back of the TV panel is blocked or allowed through LCD shutters (liquid crystal display – basically the same technology you find on a digital watch face) into red, blue, or green filtered sub-pixels. Switching the light on or off into the sub-pixels creates the appropriate coloured light in each pixel making up the image.

The key features of LCD's are:

• Reduced electricity consumption compared to Plasma TV's
• They are immune to image burn–in
• While the gap is closing, they tend to be expensive in the largest sizes
• LCD's struggle with fast moving images (e.g. sports) causing blurring
• Their viewing angle generally isn't as good as Plasma TV's

LED

This is a marketing term for a type of LCD TV that uses LED's (light emitting diodes) to supply the white light coming from the back of the TV panel. Despite some recent hype about this being a breakthrough technology, it's been around on some TV's since 2004. LED TV's come in two flavours, edge lit (where the LED's are arranged around the outer rim of the TV panel facing inwards) or back-lit (where the rear of the TV panel is made up of LED's).

The key features of LED's are:

• Reduced electricity consumption compared to CCFL LCD and Plasma TV's
• Edge lit TV's tend to be extremely thin and lightweight
• Depending on the technology used (more about that here) LED TV's may display better contrast ratio's (i.e. a deeper blacks) than CCFL LCD TV's
• They are more expensive to produce than CCFL LCD TV's

OLED

Unlike so called LED TV's, OLED TV's are based on a 'true' LED TV technology. Each pixel on the screen is made up of either a red blue or green organic light emitting diode ('organic' is chemistry speak for saying a material contains carbon), which when stimulated by electricity the pixel fluoresce, producing coloured light. The key difference between is that unlike LCD and LED technology, OLED TV's require no backlight, making them extremely energy efficient.

The key features of OLED's are:

• Being made up of just a single layer the panel can be extremely thin, just a few millimetres in some cases
• The most energy efficient of all the TV technologies
• A very new technology that is only available in a few products
• Very expensive to produce, in the short term you are more likely to see these used in laptop displays rather than TV's.

CRT

This is the old-fashioned tube TV that's been around for sixty years or more. A beam of electrons is steered to hit a phosphorescent layer at the front of the screen, forming an image.

The key features of CRT's are:

• Though you can't buy one new, second-hand models are very cheap
• Heavy, and relatively energy inefficient
• A dated technology that is no longer manufactured

Rear Projection

These project a video image from a LCD, CRT, or DLP projector at the rear of the cabinet onto the screen using a system of mirrors

The key features of rear projection TV's are:

• Cheap to produce for large screen sizes
• The arrangement of mirrors means that the TV cabinet can be shallower than CRT TV's – though still much deeper than flat panel plasma, LCD, LED, and OLED TV's
• Rear projection TV's lack brightness, and can look washed out in well lit rooms
• A dated technology that is rapidly dying out

Ethernet Cable - Color Coding Diagram

The information listed here is to assist Network Administrators in the color coding of Ethernet cables. Please be aware that modifying Ethernet cables improperly may cause loss of network connectivity. Use this information at your own risk, and insure all connectors and cables are modified in accordance with standards. The Internet Centre and its affiliates cannot be held liable for the use of this information in whole or in part.

The TIA/EIA 568-A standard which was ratified in 1995, was replaced by the TIA/EIA 568-B standard in 2002 and has been updated since. Both standards define the T-568A and T-568B pin-outs for using Unshielded Twisted Pair cable and RJ-45 connectors for Ethernet connectivity.

The standards and pin-out specification appear to be related and interchangeable, but are not the same and should not be used interchangeably.

Both the T-568A and the T-568B standard Straight-Through cables are used most often as patch cords for your Ethernet connections. If you require a cable to connect two Ethernet devices directly together without a hub or when you connect two hubs together, you will need to use a Crossover cable instead.

A good way of remembering how to wire a Crossover Ethernet cable is to wire one end using the T-568A standard and the other end using the T-568B standard. Another way of remembering the color coding is to simply switch the Green set of wires in place with the Orange set of wires. Specifically, switch the solid Green (G) with the solid Orange, and switch the green/white with the orange/white.

Ethernet Cable Instructions:

1. Pull the cable off the reel to the desired length and cut. If you are pulling cables through holes, its easier to attach the RJ-45 plugs after the cable is pulled. The total length of wire segments between a PC and a hub or between two PC's cannot exceed 100 Meters (328 feet) for 100BASE-TX and 300 Meters for 10BASE-T.

2. Start on one end and strip the cable jacket off (about 1") using a stripper or a knife. Be extra careful not to nick the wires, otherwise you will need to start over.

3. Spread, untwist the pairs, and arrange the wires in the order of the desired cable end. Flatten the end between your thumb and forefinger. Trim the ends of the wires so they are even with one another, leaving only 1/2" in wire length. If it is longer than 1/2" it will be out-of-spec and susceptible to crosstalk. Flatten and insure there are no spaces between wires.

4. Hold the RJ-45 plug with the clip facing down or away from you. Push the wires firmly into the plug. Inspect each wire is flat even at the front of the plug. Check the order of the wires. Double check again. Check that the jacket is fitted right against the stop of the plug. Carefully hold the wire and firmly crimp the RJ-45 with the crimper.

5. Check the color orientation, check that the crimped connection is not about to come apart, and check to see if the wires are flat against the front of the plug. If even one of these are incorrect, you will have to start over. Test the Ethernet cable.

Ethernet Cable Tips:

A straight-thru cable has identical ends.

A crossover cable has different ends.

A straight-thru is used as a patch cord in Ethernet connections.

A crossover is used to connect two Ethernet devices without a hub or for connecting

two hubs.

A crossover has one end with the Orange set of wires switched with the Green set.

Odd numbered pins are always striped, even numbered pins are always solid colored.

Looking at the RJ-45 with the clip facing away from you, Brown is always on the right, and pin 1 is on the left.

No more than 1/2" of the Ethernet cable should be untwisted otherwise it will be susceptible to crosstalk.

Do not deform, do not bend, do not stretch, do not staple, do not run parallel with power cables, and do not run Ethernet cables near noise inducing components.

By looking at a T-568A UTP Ethernet straight-thru cable and an Ethernet crossover cable with a T-568B end, we see that the TX (transmitter) pins are connected to the corresponding RX (receiver) pins, plus to plus and minus to minus. You can also see that both the blue and brown wire pairs on pins 4, 5, 7, and 8 are not used in either standard. What you may not realize is that, these same pins 4, 5, 7, and 8 are not used or required in 100BASE-TX as well. So why bother using these wires, well for one thing its simply easier to make a connection with all the wires grouped together. Otherwise you'll be spending time trying to fit those tiny little wires into each of the corresponding holes in the RJ-45 connector.

Difference Between 1G, 2G, 2.5G, 3G, Pre-4G And 4G

1G is the first generation cellular network that existed in 1980s. It transfer data (only voice) in analog wave, it has limitation because there are no encryption, the sound quality is poor and the speed of transfer is only at 9.6kbps.

2G is the second one, improved by introducing the concept of digital modulation, which means converting the voice(only) into digital code(in your phone) and then into analog signals(imagine that it flys in the air). Being digital, they overcame some of the limitations of 1G, such as it omits the radio power from handsets making life more healthier, and it has enhanced privacy.

2.5G is a transition of 2G and 3G. In 2.5G, the most popular services like SMS (short messaging service), GPRS, EDGE, High Speed Circuit switched data, and more had been introduced.

3G is the current generation of mobile telecommunication standards. It allows simultaneous use of speech and data services and offers data rates of up to 2 Mbps, which provide servcies like video calls, mobile TV, mobile Internet and downloading.   There are a bunch of technologies that fall under 3G, like WCDMA, EV-DO, and HSPA and others.

In Telecommunications, 4G is the fourth generation of cellular wireless standards. It is a successor to the 3G and 2G families of standards. In 2008, the ITU-R organization specified the IMT-Advanced (International Mobile Telecommunications Advanced) requirements for 4G standards, setting peak speed requirements for 4G service at 100 Mbit/s for high mobility communication (such as from trains and cars) and 1 Gbit/s for low mobility communication (such as pedestrians and stationary users)

A 4G system is expected to provide a comprehensive and secure all-IP based mobile broadband solution to laptop computer wireless modems, smartphones, and other mobile devices. Facilities such as ultra-broadband Internet access, IP telephony, gaming services, and streamed multimedia may be provided to users.

PRE-4G technologies such as mobile WiMAX and Long term evolution (LTE) have been on the market since 2006 and 2009 respectively, and are often branded as 4G. The current versions of these technologies did not fulfill the original ITU-R requirements of data rates approximately up to 1 Gbit/s for 4G systems. Marketing materials use 4G as a description for LTE and Mobile-WiMAX in their current forms.

Blue Ray Disk (BRD)

Blue Ray Disc
Blue ray disk will look like a normal DVD. But it contains more space. It contains 25 GB for a single layer and 50 GB for a dual layer. Recently many companies have experimented with blue ray disks.Some of the new disks have a space of 100 GB which contains 4 layers and 500 GB which contains 20 layers.


Blu-ray Disc have a storage upto 500 GB in one single disc. Blu-ray Disc is an optical disc storage medium designed to compensate the DVD format. This standard physical medium is a 12 cm plastic optical disc, the same size of DVDs and CDs.

Blu-ray Discs contain 25 GB per layer, with dual layer discs (50 GB) the norm for feature-length video discs and additional layers possible in the future.

We can store huge number of movies in one single disc. It mainly used for Full HD Movie(1080p, 1080i)

Comparison Of Blue Ray With Other Optical Devices

The optical device that we use regularly are

1. Compact disc (CD)

2. Digital Versatile Disc (DVD)

3. Blue Ray disc (BRD)

Compact disc

Compact disc has storage capacity of 700 MB. The use of this is to store music files and small storage of data.

Digital Versatile Disc

Digital Versatile Disc has storage capacity of 4.7 GB (Single Layer) & 8.5 GB (Double Layer). The use of this is to store movies and medium storage of data.

Blue Ray disc

Blue ray disc have maximum storage capacity than the above two. It uses special disc drives called blue ray drives to read the disc. Whereas DVD and CD requires normal disc drives to read the disc. The Blue ray uses blue laser to read the disc. The cost of Blue ray is pretty higher than CD and DVD. The cost of Blu-ray disc varies from Rs.100 to RS.250 with respect to storage capacity and company.