Welcome to Infoguyz

How Streaming Video and Audio Work

noreply@blogger.com (Infoguyz) — Mon, 10 May 2010 14:32:00 +0000

In the early days of streaming media -- the mid-to-late 1990s --
watching videos and listening to music online wasn't always fun. It was a little like driving in stop-and-go traffic during a heavy rain. If you had a slow computer or a dial-up Internet connection, you could spend more time staring at the word "buffering" on a status bar than watching videos or listening to songs. On top of that,everything was choppy, pixilated and hard to see.

Streaming video and audio have come a long way since then. According to Bridge Ratings, 57 million people listen to Internet radio every week. In 2006, people watched more than a million streaming videos a day on YouTube . The same year, television network ABC started streaming its most popular TV shows over the Web. People who missed an episode of shows like "Lost" or "Grey's Anatomy" could catch up on the entire thing online -- legally and for free.

Streaming videos directly to computer

The success of streaming media is pretty recent, but the idea behind it has been around as long as people have. When someone talks to you, information travels toward you in the form of a sound wave. Your ears and brain decode this information, allowing you to understand it. This is also what happens when you watch TV or listen to the radio. Information travels to an electronic device in the form of a cable signal, a satellite signal or radio waves. The device decodes and displays the signal.

In streaming video and audio, the traveling information is a stream of data from a server. The decoder is a stand-alone player or a plugin that works as part of a Web browser. The server, information stream and decoder work together to let people watch live or prerecorded broadcasts.

The basic preview of streaming video [windows 7 first look review]

Click here for "Finding and Playing Streaming Video and Audio"

How Touch pad works ?

noreply@blogger.com (Infoguyz) — Mon, 23 Nov 2009 02:04:00 +0000

A touchpad (also trackpad) is a pointing device consisting of specialized surface that can translate the motion and position of a user's fingers to a relative position on screen. They are a common feature of laptop computers and also used as a substitute for a computer mouse where desk space is scarce. Touchpads vary in size but are rarely made larger than 40 square centimeters (about 6 square inches). They can also be found on personal digital assistants (PDAs) and some portable media players, such as the Zune using the Zune Pad.

working and operation click here >>

Optimus keyboard

noreply@blogger.com (Infoguyz) — Sun, 20 Sep 2009 01:49:00 +0000

The Optimus Maximus keyboard, previously just "Optimus keyboard", is a keyboard developed by the Art. Lebedev Studio, a Russian design studio headed by Artemy Lebedev. Each of its keys is a display which can dynamically change to adapt to the keyboard layout in use or to show the function of the key. Pre-orders began on 20 May 2007 for a limited production run from December 2007 to January 2008, with a second batch expected to arrive in February 2008. It first started shipping the week of February 21, 2008.

Overview

The design featured on the studio's website received attention on the web when it was featured on Slashdot on 14 July 2005, and afterwards for a few weeks on other technology websites. The original release date was "end of 2006", however production issues caused the Optimus mini three to be developed first, with the full keyboard delayed until the end of 2007. The keyboard was number 10 in the Wired Magazine 2006 Vaporware Awards and number 4 on the list in 2007 due to its numerous delays and feature reductions.

The Optimus allows for greater user interaction, by dynamically displaying the current function of the keys. For example, when the user presses the shift key, the pictures would change to upper-case versions. It would also make switching between different keyboard layouts (such as English and Cyrillic) rapid, and could make the switch to alternative layouts such as Dvorak easier for people who only have a QWERTY keyboard with no possibility of rearranging the keys. To demonstrate this concept, there are computer renderings showing example layouts for Quake III Arena and Adobe Photoshop.

A newly-revealed (as of January 3, 2008) patent application filed on March 13, 2007 suggests that Apple Inc. may be working on a similar dynamically changeable OLED keyboard

Optimus mini three

Art. Lebedev Studio has released a smaller three-key version of their keyboard, named Optimus mini three. Each of the keys is larger than a standard key. The mini three can be adjusted, through the configuration software, to either a horizontal or vertical orientation.

Initial reviews have been mixed. The keyboard functions as advertised, but it has been criticized for inordinately high CPU usage, slow response time, and buggy configuration software

Optimus Aux

On July 21, 2008, Engadget posted about a new version of the keyboard, named Optimus Pultius. It features 15 OLED keys in a three-by-five arrangement and a USB port. It is expected to be released in late 2008 or early 2009.[6][7] On September 19, 2008, Engadget also reported that the Pultius had been renamed to the Aux[8] and included a new rendering of the rear side showing that there would be two USB ports instead of one.

Variations

Variations with fewer OLED keys will also be available, each upgradeable by replacing static keys with OLED keys after purchase. For keyboards with less than a full complement of OLED "active keys", additional keys can be purchased and installed.

Special Features

Art. Lebedev Studio is expecting to manufacture the keyboard with these features:[3]

* A plastic body (width: 537 mm, depth: 173 mm, height: 38 mm)
* Extra-durable polymer plastic keys (20.2×20.2 mm, visible area 10.1×10.1 mm)
* 48×48 pixel screens, Highcolor mode (65 536 colors, 10 FPS)
* OLED (Organic Light Emitting Diode) screen for keys
* USB 2.0 (or 1.1) connectivity
* 4-5 year lifetime
* A key-saver mode
* Support for animation on keys at 10 FPS minimum
* Ability to form a mosaic using a combination of key images
* Compatibility with Windows XP, Windows Vista and Mac OS X 10.5.1 (and higher).
* An SDK for complete display customization
* Swappable keys and support for keys without displays
* 32 MB SD card for storing basic layouts
* Non-stop glow time at nominal brightness of 20,000 hours, after which display quality will diminish
* An ambient light sensor which can be used to automatically adjust display brightness
* A viewing angle of 160°

More images and videos of "Optimus keyboard" >>>

What is phishing?

noreply@blogger.com (Infoguyz) — Wed, 09 Sep 2009 23:21:00 +0000

INTRODUCTION:

In the field of computer security, phishing is the criminally fraudulent process of attempting to acquire sensitive information such as usernames, passwords and credit card details by masquerading as a trustworthy entity in an electronic communication.

Phishing is a scam in which the attacker sends an email purporting to be from a valid financial or eCommerce provider. The email often uses fear tactics in an effort to entice the intended victim into visiting a fraudulent website. Once on the website, which generally looks and feels much like the valid eCommerce/banking site, the victim is instructed to login to their account and enter sensitive financial information such as their bank PIN number, their Social Security number, mother's maiden name, etc. This information is then surreptitiously sent to the attacker who then uses it to engage in credit card and bank fraud - or outright identity theft.

Many of these phishing email appear to be quite legitimate. Don't be a victim. Look over the following examples of phishing scams to familiarize yourself with the clever techniques used.

Click here to see the examples

How Photocopiers Work ..??

noreply@blogger.com (Infoguyz) — Sat, 08 Aug 2009 15:13:00 +0000

How Photocopiers Work

A typical business photocopier from Xerox

Walk into almost any business office, and you'll probably find a photocopier ("copier") with a line of people waiting to use it. For most businesses, small or large, the copier has become standard equipment, much like having a desk to work at and a chair to sit in.

What if you had to resort to making carbon copies of important documents, as many people did before copiers came along? Or worse, imagine how tedious it would be if you had to recopy everything by hand! Most of us don't think about what's going on inside a copier while we wait for copies to shoot neatly out into the paper tray, but it's pretty amazing to think that, in mere seconds, you can produce an exact replica of what's on a sheet of paper! In this article, we will explore what happens after you press "Start" on a photocopier.

A typical business photocopier from Xerox

Click Here To Read more >>>

What is Web hosting..?

noreply@blogger.com (Infoguyz) — Sat, 01 Aug 2009 06:55:00 +0000

A web hosting service is a type of Internet hosting service that allows individuals and organizations to provide their own website accessible via the World Wide Web. Web hosts are companies that provide space on a server they own or lease for use by their clients as well as providing Internet connectivity, typically in a data center. Web hosts can also provide data center space and connectivity to the Internet for servers they do not own to be located in their data center, called colocation.

Click here to read more >>>

Operating System (starring Linux)

noreply@blogger.com (Infoguyz) — Tue, 28 Jul 2009 15:03:00 +0000

Introduction:

Every desktop computer uses an operating system. The most popular operating systems in use today are:

Windows
Mac OS
UNIX

Linux is an operating system -- very much like UNIX -- that has become very popular over the last several years.

CLICK HERE TO READ MORE>>>

Get Familiar with these extensions .....

noreply@blogger.com (Infoguyz) — Tue, 21 Jul 2009 00:54:00 +0000

Sound :

MPEG-1/2 Audio Layer 3 (.mp3)
Ogg Vorbis (.ogg)
ASF Audio (.asf,.wma)
Wave form audio format (.wav)
RealAudio (.ra,.rm)
Free Lossless Audio codec(.flac)
Advanced Audio coding (.aac)
MPEG-4 advanced audio coding (.m4a,.mp4)
Musepack (.mpc)
TwinVQ(.vqf)
3GP Music (.3gp)
AC3 Audio File (.ac3)
Adaptive Multi-Rate (.amr)
Adaptive Multi-Rate WB (.awb)
Sun Mircrosystem's audio format (.au,.snd)
Audio Interchange File Format (.aiff)
Purevoice File (.qcp)
AMIGA 8bit sound file (.8svx)
PSION sound file (.prc)
IRCAM sound file (.sf)
soundTool (.sndt)
PSION 8bit sound file (.wve)
soundtracker module (.mod)
FastTracker II module (.xm)
ImpulseTracker module (.it)
ScreamTracker module (.s3m)

Ringtone (Monophonic/Polyphonic) :

MIDI-0 (.mid,.midi)
SP-MIDI (.mid,.midi)
Midi Karaoke (.kar)
MMF/SMAF-1 (.mmf,.smaf)
Qualcomm CMX 3.0 (.pmd)
Motorola Ringtone (.mot)
Sagem Ringtone (.sagem)
Sagem Ringtone (.sagem21)
Ericsson emelody (.emy)
iMelody Ringtone Format (.imv)
Ringtones text transfer language (.rttl,.rtx)
Nokia phone Ring Tone (.nokia,.ott)
Nokia Phone Ring Tone (.noktxt)

Image :

Joint photographic experts group (.jfif,.jif,.jpe,.jpeg,.jpg)
Windows bitmap (.bmp)
Graphics interchange format (.gif)
Truevision TGA (.tga)
Portable network graphics (.pgm)
AVS X image (.avs)
Kodak Cineon Image Format (.cin)
ZSoft IBM PC multi-page paintbrush (.dcx)
Windows device independent bitmap (.dib)
SMPTE digital moving picture exchange (.dpx)
Microsoft icon (.ico)
Magick image file format (.miff)
On-the-air-Bitmap (.otb)
Palm pixmap (.palm)
Portable bitmap format black/white (.pbm)
Xv's Visual Schnauzer thumbnail (.p7)
Photo CD (.pcd)
Zsoft IBM PC Paintbrush file (.pcx)
Apple Mcintosh QuickDraw (.pict)
Portable Pixmap format - color (.ppm)
Adobe Photoshop bitmap file (.psd)
Photo CD - sRGB color (.pcds)
Irix RGB image (.sgi)
SUN Raster Image (.ras,.sun)
X Windows system bitmap black/white (.xbm)
X Windows system pixmap (.xpm)
CCIR 601 4:1:1 (.yuv)

Vector Document :

Windows Metafile (.wmf)
Scalable Vector Graphics (.svg)
Magick Vector Graphics (.mvg)
AutoCAD Interchange Format (.dxf)
Enhanced Metafile (.emf)
Encapsulated Postscript (.eps)
Computer Graphics Metafile (.cgm)
OS/w Metafile (.met)
OpenOffice 2.0 Draw Document (.odg)
OpenOffice 2.0 Draw Template (.otg)
OpenOffice 1.0 Draw Document (.sxd)
OpenOffice 1.0 Draw Template (.std)

Document :

Text files (.txt)
Url address (web) (.url)
HyperTextMarkup Language (.htm,.html)
XHTML (.xhtml)
Rich Text Format/MS Word (.rtf)
Portable Document Format (.pdf)
Adobe Postscript (.ps)
Microsoft Word (.doc)
MS Word template (.dot)
OpenOffice 2.0 Text Document (.odt)
OpenOffice 2.0 Text Template (.ott)
OpenOffice 1.0 Text Document (.sxw)
OpenOffice 1.0 Text Template (.stw)
AportisDoc Palm DB (.pdb)
Starwriter vorlage/Template (.vor)
PocketWord (.psw)
Wordperfect 6 (.wpd)
MS Word 2003 XML (.xml)

Data :

Data Interchange Format (.dif)
dBASE (.dbf)
Microsoft Excel (.xls)
MS Excel Vorlage/Template (.xlt)
Pocket Excel (.pxl)
SYLK (.slk)
Lotus 1-2-3 (.123,.wk1)
StarCalc (.sdc)
StarCalc Template (.vor)
OpenOffice 2.0 Spreadsheet (.ods)
OpenOffice 2.0 Calc template (.ots)
OpenOffice 1.0 spreadsheet (.sxc)
OpenOffice 1.0 calc template (.stc)

Mathematics :

MathML (.mml)
StarMath (.smf)
OpenOffice 2.0 Math (.odf)
OpenOffice 1.0 Math (.sxm)

Presentation :

Microsoft Powerpoint (.ppt)
Microsoft Powerpoint Template (.pot)
StarImpress 5.0 (.sdd)
StarImpress 5.0 Template (.vor)
StarImpress 4.0 (.sdd)
StarImpress 4.0 Template (.vor)
OpenOffice 2.0 Impress (.odp)
OpenOffice 2.0 Impress Template (.otp)
OpenOffice 1.0 Impress (.sxi)
OpenOffice 1.0 Impress Template (.sti)

Compressed archives:

Data compression (.zip)
7Z Archive (.7z)
LHA Archive (.lha,.lzh)
Roshal ArchiveArchive (.rar)
Tape ARchive (.tar)
TAR Gzip Compressed archive (.gz)
BZ2 compressed archive (.bza)
Deepfreezer YZ1 archive (.yz1)

Movie:

Windows Media Video (.wmv)
3GP/3G2 Video (.3gp)
Audio Video Interleave (.avi)
Matroska (.mkv)
Apple Quicktime (.mov)
Motion Picture Expert Group (.pg)
Ogg vorbis Compressed video (.ogm)
MPEG-4 (.mp4)
Flash Video (.flv)
DVD Video Object (.vob)
FLIC Animation (.fli)
Digital Video (.dv)
ASF Video (.asf)
Google Video File (.gvi)

Browse your friend computer from ur home

noreply@blogger.com (Infoguyz) — Thu, 16 Jul 2009 15:12:00 +0000

Hello guyz .. this is the software which u can browse your friends computer through your PC and even u can do every thing. Its very easy and useful for us to help our friends with their computer problems.This software allows you to access your friend's computer and then solve the problem by sitting at your home no matter if u r on other OTHER end of the world. Just go to this link download and install that software and have fun...

click here for link

and even your friend should install it .......

click here "How to install"

Free Vista ShutdownTimer

noreply@blogger.com (Infoguyz) — Sat, 11 Jul 2009 16:43:00 +0000

Vista Shutdown timer is a free software...

Screen shot:

MORE SCREEN SHOTS

click here to Download Vista-Shutdown Timer 1.6.5

Info on speech recognition

noreply@blogger.com (Infoguyz) — Fri, 10 Jul 2009 13:07:00 +0000

INTRODUCTION:

Today, when we call most large companies, a person doesn't usually answer the phone. Instead, an automated voice recording answers and instructs you to press buttons to move through option menus. Many companies have moved beyond requiring you to press buttons, though. Often you can just speak certain words (again, as instructed by a recording) to get what you need. The system that makes this possible is a type of speech recognition program -- an automated phone system.

You an also use speech recognition software in homes and businesses. A range of software products allows users to dictate to their computer and have their words converted to text in a word processing or e-mail document. You can access function commands, such as opening files and accessing menus, with voice instructions. Some programs are for specific business settings, such as medical or legal transcription.

People with disabilities that prevent them from typing have also adopted speech-recognition systems. If a user has lost the use of his hands, or for visually impaired users when it is not possible or convenient to use a Braille keyboard, the systems allow personal expression through dictation as well as control of many computer tasks. Some programs save users' speech data after every session, allowing people with progressive speech deterioriation to continue to dictate to their computers.

For more info click here

Working Of CRT..

noreply@blogger.com (Infoguyz) — Fri, 26 Jun 2009 07:30:00 +0000

CRT Monitors

A CRT [Cathode Ray Tube]monitor contains millions of tiny red, green, and blue phosphor dots that glow when struck by an electron beam that travels across the screen to create a visible image. The illustration below shows how this works inside a CRT.

The terms anode and cathode are used in electronics as synonyms for positive and negative terminals. For example, you could refer to the positive terminal of a battery as the anode and the negative terminal as the cathode.

In a cathode ray tube, the "cathode" is a heated filament. The heated filament is in a vacuum created inside a glass "tube." The "ray" is a stream of electrons generated by an electron gun that naturally pour off a heated cathode into the vacuum. Electrons are negative. The anode is positive, so it attracts the electrons pouring off the cathode. This screen is coated with phosphor, an organic material that glows when struck by the electron beam.

There are three ways to filter the electron beam in order to obtain the correct image on the monitor screen: shadow mask, aperture grill and slot mask. These technologies also impact the sharpness of the monitor's display. Let's take a closer look at these now.

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INTEL 8085 Microprocessor

noreply@blogger.com (Infoguyz) — Wed, 24 Jun 2009 15:45:00 +0000

INTEL 8085:

The Intel 8085 is an 8-bit microprocessor introduced by Intel in 1977. It was binary-compatible with the more-famous Intel 8080 but required less supporting hardware, thus allowing simpler and less expensive microcomputer systems to be built.

The "5" in the model number came from the fact that the 8085 required only a +5-volt (V) power supply rather than the +5V, -5V and +12V supplies the 8080 needed. Both processors were sometimes used in computers running the CP/M operating system, and the 8085 later saw use as a microcontroller (much by virtue of its component count reducing feature). Both designs were eclipsed for desktop computers by the compatible but more capable Zilog Z80, which took over most of the CP/M computer market as well as taking a large share of the booming home computer market in the early-to-mid-1980s.

INTEL 8085 Mp

The 8085 had a very long life as a controller. Once designed into such products as the DECtape controller and the VT100 video terminal in the late 1970s, it continued to serve for new production throughout the life span of those products (generally many times longer than the new manufacture lifespan of desktop computers).

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What is a Microprocessor ? [Deep Explanation]

noreply@blogger.com (Infoguyz) — Wed, 24 Jun 2009 14:40:00 +0000

Intel 4004 first Microprocessor

A microprocessor incorporates most or all of the functions of a central processing unit (CPU) on a single integrated circuit (IC). The first microprocessors emerged in the early 1970s and were used for electronic calculators, using binary-coded decimal (BCD) arithmetic on 4-bit words. Other embedded uses of 4- and 8-bit microprocessors, such as terminals, printers, various kinds of automation etc, followed rather quickly. Affordable 8-bit microprocessors with 16-bit addressing also led to the first general purpose microcomputers in the mid-1970s. The recent development of fast microprocessors is also linked to the growing popularity of fourth generation programming languages.

Computer processors were for a long period constructed out of small and medium-scale ICs containing the equivalent of a few to a few hundred transistors. The integration of the whole CPU onto a single VLSI chip therefore greatly reduced the cost of processing capacity. From their humble beginnings, continued increases in microprocessor capacity have rendered other forms of computers almost completely obsolete ( history of computing hardware), with one or more microprocessor as processing element in everything from the smallest embedded systems and handheld devices to the largest mainframes and supercomputers.

Since the early 1970s, the increase in capacity of microprocessors has been known to generally follow Moore's Law, which suggests that the complexity of an integrated circuit, with respect to minimum component cost, doubles every two years. In the late 1990s, and in the high-performance microprocessor segment, heat generation (TDP), due to switching losses, static current leakage, and other factors, emerged as a leading

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515 Tutorials in one pack. U Never Wanna Miss That

noreply@blogger.com (Infoguyz) — Sat, 20 Jun 2009 12:36:00 +0000

Here is the 515 tutorials of my collection i think this may help you ...all material is in text format only....

Click here for the list of Tutorials

How to solve basic Dual Boot Issues

noreply@blogger.com (Infoguyz) — Fri, 19 Jun 2009 14:55:00 +0000

These are the collection for having Dual Booting problems...I think this may solve that

Case 1:
You have Dual Boot Win7 and XP/Vista and you lost the XP/Vista boot option at startup, but Win7 boots fine.

Solution:
1.) Start Win7.

2.) If you can see your XP/Vista partition in Computer, write down the drive letter (e.g. D)

3.) If you can't see the XP partition and you see all others but this one, open Control Panel - Administrative Tools - Computer Management -> Disk Management(left pane) and right-click the partition without a drive letter, choose "Change drive letters and paths" and assign a drive letter for the partition, e.g. D:

4.) Open an elevated command prompt and type the following lines followed by Enter for each line, changing the drive letter D: (in blue) with the one on your XP/Vista partition:

FOR RESTORING XP:

bcdedit /create {ntldr} /d "Windows XP"

bcdedit /set {ntldr} device partition=D:

bcdedit /set {ntldr} path \ntldr

bcdedit /displayorder {ntldr} /addlast

FOR RESTORING VISTA:

bcdedit /copy {current} /d "Windows Vista"

(You will get a response saying that a new {UUID} was created successfully. Write down or copy the new UUID.)

bcdedit /set {place_new_UUID_here} device partition=D:
bcdedit /set {place_new_UUID_here} osdevice partition=D:

5.) Done

Case 2:
You have Dual Boot Win7 and XP/Vista and you lost the Win7 boot option at startup, but XP/Vista boots fine.

Solution:

1. Insert the Win7 Installation DVD and boot your computer with it (as if you were making an installation).

2. At the first screen , select your language etc and press enter.

3. At the second screen, click "Repair Computer" at the bottom left.

4. Wait until startup repair is finished and reboot.

5. Done. You can now boot Win7.

Case 3: You have restored booting Win7 using the Case 2 method or other way, but now you've lost XP/VISTA .

Solution: Follow Case 1 Solution.

Case 4: You want Win7/Mac Dual Boot.

Solution: Follow these instructions: OSX and Windows 7 Dual Boot Hope it helps

Download this via E book

Overclocking

noreply@blogger.com (Infoguyz) — Tue, 16 Jun 2009 01:13:00 +0000

Info on overclocking:

Introduction:

Many people probably don't know what overclocking is but have possibly heard the term used before. To put it in its simplest terms, overclocking is taking a computer component such as a processor and running at a specification higher than rated by the manufacturer. Every part produced by companies such as Intel and AMD are rated for a specific speeds. They have tested the capabilities of the part and certified it for that given speed. Of course, most parts are underrated for increased reliability. Overclocking a part simply takes advantage of the remaining potential out of a computer part that the manufacturer is unwilling to certify the part for but it is capable of.

click here to read more

Info on top 10 viruses in this world

noreply@blogger.com (Infoguyz) — Mon, 15 Jun 2009 11:32:00 +0000

Introduction:

Computer viruses can be a nightmare. Some can wipe out the information on a hard drive, tie up traffic on a computer network for hours, turn an innocent machine into a zombie and replicate and send themselves to other computers. If you've never had a machine fall victim to a computer virus, you may wonder what the fuss is about. But the concern is understandable

-- according to Consumer Reports, computer viruses helped contribute to $8.5 billion in consumer losses in 2008. Computer viruses are just one kind of online threat, but they're arguably the best known of the bunch.

Click Here to see Description on Top 10 Viruses

Video tutorials for Java

noreply@blogger.com (Infoguyz) — Tue, 09 Jun 2009 15:38:00 +0000

Video tutorials from VTC.com

Click Here for More Details and Downloads

Easy Torrent Explained

noreply@blogger.com (Infoguyz) — Tue, 09 Jun 2009 15:30:00 +0000

Torrents Explained...

Torrent is a very small file whose file name ends with " .torrent " extension. It (A torrent file) contains all the information about the file to be downloaded like file name, file size, date of creation and some other information. A torrent file also contains a list of trackers. You can download very large files like games, movies, videos etc very easily using torrents. You can also use torrents to share files with your friends instead of sharing files through messengers.

What is a tracker ?
A tracker is a computer on the internet. It comes into action as soon as you open the .torrent file using a torrent client. Tracker manages the torrent file on the internet. Tracker also allows the parts of the file to be downloaded from more than one server.

What is a seeder ?
A seeder is a person who has more than 0% of the file associated with the torrent file.

What is a leecher ?
A leecher is a person who is attempting to download the files through torrent.

The downloading time will depend on the number of seeders and leechers. More the seeders, lesser the time and more the leechers, more the time.

How to download files using torrent ?

It is very easy to download through torrents. First of all download and install a torrent client software. You need this software to open torrent files. uTorrent is one of the best torrent client software. Now find a file that you want to download from a torrent search engine.

After you find the desired file, the torrent search engine will allow you to download a .torrent file. Download that torrent file. Now open this torrent file using uTorrent (Or any other client software) and it will start download the file for you.

CCNA Tutorial in simple PowerPoint Presentations [New]

noreply@blogger.com (Infoguyz) — Tue, 09 Jun 2009 14:58:00 +0000

CCNA Tutorial in just 5.5MB with Power Point presentation download and enjoy

Click Here to Download

How To Install Windows Server 2008

noreply@blogger.com (Infoguyz) — Mon, 08 Jun 2009 15:50:00 +0000

Server 2008 E-book Explained by step by step process hope you liked this description

here's the download link from Mediafire server only

[500 Kilobytes file size ] [ .pdf Format]

http://www.mediafire.com/download.php?jztz3ng0tmm

CCNA Exam Prep (Exam 640-802)

noreply@blogger.com (Infoguyz) — Mon, 08 Jun 2009 14:59:00 +0000

Book Description :::::::::

The CCNA Exam Prep, Second Edition, is an in-depth training guide for the new CCNA (Cisco Certified Network Associate) certification from Cisco. Published in the popular Exam Prep series, the book incorporates all the topics tested in this newly-revised exam, including new security, VPN, wireless, IPv6, and troubleshooting coverage. The authors emphasize sub-netting concepts because this is historically a difficult roadblock for Cisco certification candidates. This Exam Prep covers all the exam objectives and will give you a thorough understanding of each testable concept in addition to real-world configuration examples for configuring a wide range of Cisco devices. The Prep begins with an objectives quick reference and includes chapter summaries with a list of key terms, exercises, review questions, and an exam on chapter content with detailed answers. Exam Preps include notes, tips, cautions, and exam alerts to help you focus on important issues. If you are preparing for this exam you will find the Exam Prep series to be the complete certification solution for the CCNA exam.

# 1008 pages
# Publisher: Que; 2 edition (December 28, 2007)
# Language: English
# ISBN-10: 0789737132
# ISBN-13: 978-0789737137

http://rapidshare.com/files/85404805/02.2tion.De32.pdf

HowStuffWorks-Flash collection-365 flash files

noreply@blogger.com (Infoguyz) — Mon, 08 Jun 2009 14:34:00 +0000

Click Here to Download

How Speakers Work??

noreply@blogger.com (Infoguyz) — Tue, 26 May 2009 14:35:00 +0000

In any sound system, ultimate quality depends on the speakers. The best recording, encoded on the most advanced storage device and played by a top-of-the-line deck and amplifier, will sound awful if the system is hooked up to poor speakers.

A system's speaker is the component that takes the electronic signal stored on things like CDs, tapes and DVDs and turns it back into actual sound that we can hear.

In this article, we'll find out exactly how speakers do this. We'll also look at how speaker designs differ, and see how these differences affect sound quality. Speakers are amazing pieces of technology that have had a profound impact on our culture. But at their heart, they are remarkably simple devices.

Sound Basics

To understand how speakers work, you first need to understand how sound works.

Inside your ear is a very thin piece of skin called the eardrum. When your eardrum vibrates, your brain interprets the vibrations as sound -- that's how you hear. Rapid changes in air pressure are the most common thing to vibrate your eardrum.

An object produces sound when it vibrates in air (sound can also travel through liquids and solids, but air is the transmission medium when we listen to speakers). When something vibrates, it moves the air particles around it. Those air particles in turn move the air particles around them, carrying the pulse of the vibration through the air as a traveling disturbance.

To see how this works, let's look at a simple vibrating object -- a bell. When you ring a bell, the metal vibrates -- flexes in and out -- rapidly. When it flexes out on one side, it pushes out on the surrounding air particles on that side. These air particles then collide with the particles in front of them, which collide with the particles in front of them and so on. When the bell flexes away, it pulls in on these surrounding air particles, creating a drop in pressure that pulls in on more surrounding air particles, which creates another drop in pressure that pulls in particles that are even farther out and so on. This decreasing of pressure is called rarefaction.

In this way, a vibrating object sends a wave of pressure fluctuation through the atmosphere. When the fluctuation wave reaches your ear, it vibrates the eardrum back and forth. Our brain interprets this motion as sound.

Differentiating Sound

We hear different sounds from different vibrating objects because of variations in:

* Sound-wave frequency - A higher wave frequency simply means that the air pressure fluctuates faster. We hear this as a higher pitch. When there are fewer fluctuations in a period of time, the pitch is lower.

* Air-pressure level - This is the wave's amplitude, which determines how loud the sound is. Sound waves with greater amplitudes move our ear drums more, and we register this sensation as a higher volume.

A microphone works something like our ears. It has a diaphragm that is vibrated by sound waves in an area. The signal from a microphone gets encoded on a tape or CD as an electrical signal. When you play this signal back on your stereo, the amplifier sends it to the speaker, which re-interprets it into physical vibrations. Good speakers are optimized to produce extremely accurate fluctuations in air pressure, just like the ones originally picked up by the microphone. In the next section, we'll see how the speaker accomplishes this.

Making Sound

In the last section, we saw that sound travels in waves of air pressure fluctuation, and that we hear sounds differently depending on the frequency and amplitude of these waves. We also learned that microphones translate sound waves into electrical signals, which can be encoded onto CDs, tapes, LPs, etc. Players convert this stored information back into an electric current for use in the stereo system.

Making Sound: Diaphragm

A driver produces sound waves by rapidly vibrating a flexible cone, or diaphragm.

* The cone, usually made of paper, plastic or metal, is attached on the wide end to the suspension.
* The suspension, or surround, is a rim of flexible material that allows the cone to move, and is attached to the driver's metal frame, called the basket.
* The narrow end of the cone is connected to the voice coil.
* The coil is attached to the basket by the spider, a ring of flexible material. The spider holds the coil in position, but allows it to move freely back and forth.

Some drivers have a dome instead of a cone. A dome is just a diaphragm that extends out instead of tapering in.

A speaker is essentially the final translation machine -- the reverse of the microphone. It takes the electrical signal and translates it back into physical vibrations to create sound waves. When everything is working as it should, the speaker produces nearly the same vibrations that the microphone originally recorded and encoded on a tape, CD, LP, etc.

A typical speaker driver, with a metal basket, heavy permanent magnet and paper diaphragm

Making Sound: Voice Coil

The voice coil is a basic electromagnet.

If you've read How Electromagnets Work, then you know that an electromagnet is a coil of wire, usually wrapped around a piece of magnetic metal, such as iron. Running electrical current through the wire creates a magnetic field around the coil, magnetizing the metal it is wrapped around. The field acts just like the magnetic field around a permanent magnet: It has a polar orientation -- a "north" end and and a "south" end -- and it is attracted to iron objects. But unlike a permanent magnet, in an electromagnet you can alter the orientation of the poles. If you reverse the flow of the current, the north and south ends of the electromagnet switch.

This is exactly what a stereo signal does -- it constantly reverses the flow of electricity. If you've ever hooked up a stereo system, then you know that there are two output wires for each speaker -- typically a black one and a red one

The wire that runs through the speaker system connects to two hook-up jacks on the driver.

Essentially, the amplifier is constantly switching the electrical signal, fluctuating between a positive charge and a negative charge on the red wire. Since electrons always flow in the same direction between positively charged particles and negatively charged particles, the current going through the speaker moves one way and then reverses and flows the other way. This alternating current causes the polar orientation of the electromagnet to reverse itself many times a second.

Driver Types

In the last section, we saw that traditional speakers produce sound by pushing and pulling an electromagnet attached to a flexible cone. Although drivers are all based on the same concept, there is a wide range in driver size and power. The basic driver types are:

* Woofers
* Tweeters
* Midrange

WOOFER

Tweeters

midrange

Woofers are the biggest drivers, and are designed to produce low frequency sounds. Tweeters are much smaller units, designed to produce the highest frequencies. Midrange speakers produce a range of frequencies in the middle of the sound spectrum.

And if you think about it, this makes perfect sense. To create higher frequency waves -- waves in which the points of high pressure and low pressure are closer together -- the driver diaphragm must vibrate more quickly. This is harder to do with a large cone because of the mass of the cone. Conversely, it's harder to get a small driver to vibrate slowly enough to produce very low frequency sounds. It's more suited to rapid movement.