Pc World

سلام دوستان .. بعد یک غیبت طولانی ..زین  پس لینوکس و مدارک مرتبط با این سیستم عامل را موشکافی می کنیم .. سیستم عامل جالبیه ..

http://www.news.com/Designer-of-laptop-for-poor-kids-starts-company/2100-1005_3-6225563.html?tag=cd.top

what is RFID
 

RFID is in use all around us. If you have ever chipped your pet with an ID tag, used EZPass through a toll booth, or paid for gas using SpeedPass, you've used RFID. In addition, RFID is increasingly used with biometric technologies for securityUnlike ubiquitous UPC bar-code technology, RFID technology does not require contact or line of sight for communication. RFID data can be read through the human body, clothing and non-metallic materials
Components
basic RFID system consists of three components

An antenna or coil
A transceiver with decoder

A transponder (RF tag) electronically programmed with unique information

The antenna emits radio signals to activate the tag and to read and write data to it. Antennas are the conduits between the tag and the transceiver, which controls the system's data acquisition and communication. Antennas are available in a variety of shapes and sizes; they can be built into a door frame to receive tag data from persons or things passing through the door, or mounted on an interstate toll booth to monitor traffic passing by on a freeway. The electromagnetic field produced by an antenna can be constantly present when multiple tags are expected continually. If constant interrogation is not required, the field can be activated by a sensor device
Often the antenna is packaged with the transceiver and decoder to become a reader (a.k.a. interrogator), which can be configured either as a handheld or a fixed-mount device. The reader emits radio waves in ranges of anywhere from one inch to 100 feet or more, depending upon its power output and the radio frequency used. When an RFID tag passes through the electromagnetic zone, it detects the reader's activation signal. The reader decodes the data encoded in the tag's integrated circuit (silicon chip) and the data is passed to the host computer for processing

RFID tags come in a wide variety of shapes and sizes. Animal tracking tags, inserted beneath the skin, can be as small as a pencil lead in diameter and one-half inch in length. Tags can be screw-shaped to identify trees or wooden items, or credit-card shaped for use in access applications. The anti-theft hard plastic tags attached to merchandise in stores are RFID tags. In addition, heavy-duty 5- by 4- by 2-inch rectangular transponders used to track intermodal containers or heavy machinery, trucks, and railroad cars for maintenance and tracking applications are RFID tags

... to be continued

• Features

Enjoy a Better Web Experience

Improved Tabbed Browsing

We love tabs as much as you do, so Firefox 2 will open new web pages in tabs by default. Each of those tabs has its own close button, but don’t worry - if you accidentally close a tab, just go to the History menu to bring it back from the list of “Recently Closed Tabs.” You’ll never be crunched for space anymore, either. When you have too many tabs open to comfortably fit in a single window, scroll arrows will appear on either side, and a button on the right side will always show you an easy-to-read list of all your open tabs.

Spell Checking

Sometimes you’re in a rush, and can’t remember if it’s “i” before “e” or the other way around. Firefox 2 has built-in spell checking to keep you from making any mistakes in your blog posts and Web-based email, so you can worry about more important things.

Search Suggestions

Some of the search engines in Firefox 2 can read your mind, and actually suggest search terms for what you’re looking for. Just start typing into the Search bar, and a drop down list of suggestions will appear. (Works for Google, Yahoo! and Answers.com.)

Session Restore

Web Feeds (RSS)

What do news headlines, indie rock podcasts, and pictures of kittens have in common? They’re all things that you can subscribe to with Web feeds. Firefox 2 gives you full control over Web feeds, showing you a preview and letting you choose how you want to subscribe. You can use a Firefox Live Bookmark, or a feed reader that you’ve installed on your computer, or through a Web service such as My Yahoo!, Bloglines or Google Reader.

Live Titles

Keep an eye on that auction or the status of a delivery using the new Live Titles feature in Firefox 2. Compact enough to fit as a bookmark label, Live Titles are regularly updated summaries of the most important information on a Web page. As the information on the page gets updated, so does your Live Title. Try one out in Firefox 2 by bookmarking www.woot.com.

Integrated Search

Firefox helps you find whatever it is that you’re looking for. The Search bar comes pre-loaded with search engines for Google, Yahoo!, Amazon, eBay, Answers.com, and Creative Commons. Wherever you are on the Web, you can enter a search term in the Search bar and receive immediate answers from the search engine you’ve chosen. You can select a new search engine from the Search bar menu at any time, and add search engines from hundreds of your favorite Web sites.

Live Bookmarks

Firefox Live Bookmarks let you view Web feeds such as news and blog headlines in the bookmarks toolbar or menu. With one glance, quickly review the latest headlines from your favorite sites and click to go directly to the articles that interest you.

Pop-up Blocker

Firefox keeps you in control of the Web pages you’re viewing, blocking annoying pop-ups. Firefox’s pop-up blocker notifies you when pop-ups are blocked via the information bar or icon on the lower right of the screen.

Streamlined Interface

Accessibility

• Stay Secure on the Web

The Web is a great place, but sometimes you’ll encounter bad people. Firefox keeps you safe from spyware, hackers, scammers and spammers, using the power of a vigilant and passionate community to protect you 24/7.

Phishing Protection

Phishing Protection takes Firefox’s security to a new level, helping to safeguard your financial information and protect you from identity theft. When you encounter a Web site that is a suspected forgery (known as a “phishing” site) Firefox will warn you and offer to take you to a search page so you can find the real Web site you were looking for.

Open Source, More Secure

At the heart of Firefox is an open source development process driven by thousands of passionate, experienced developers and security experts spread all over the world. Our openness and active community of experts helps to ensure our products are more secure and updated quickly, while also enabling us to take advantage of the best third party security scanning and evaluation tools to further bolster overall security.

Automated Update

Firefox’s update system always checks to see if you’re running the latest version, and notifies you when a security update is available. These security updates are small (usually 200KB - 700KB), giving you only what you need and making the security update quick to download and install. The automated update system provides updates for Firefox on Windows, Mac OS X, and Linux in over 40 different languages.

Protection from Spyware

Firefox will not allow a Web site to download, install, or run programs on your computer without your explicit agreement. Period. You will be notified whenever downloading or installing software, and Firefox will always tell you what’s happening so that you can stay in control of your computer.

Clear Private Data

Firefox offers the ability to clear all your private Web browsing data with just one click with the “Clear Private Data” tool. You can be confident that when you clear your private data in Firefox it’s gone - whether you are using your own computer or one at the library.

• Personalize Your Browser

Choose from thousands of useful Add-ons that enhance Firefox. It’s easy to personalize Firefox 2 to make it your own.

An Add-on for Everyone

You can choose from over 1,000 add-ons at the Firefox Add-ons Web site. A Firefox add-on can help you comparison shop, share bookmarks with your friends, see the weather in a corner of your browser, write to your weblog, get news, listen to music - all from inside the browser you already love. You can even change the appearance of your browser - from buttons to colors and fonts - so that it matches your own personal style.

Add-ons Manager for Extensions and Themes

The new Add-ons Manager improves the user interface for managing extensions and themes, making it even easier for you to customize Firefox 2. Install, uninstall, enable and disable your add-ons in a single place.

Search Engine Manager

You can now quickly add, remove and re-order your search engines in the Search bar. Firefox 2 will also detect when a Web site has a search engine that can be installed, and will install it for you with a single click in the drop-down menu.

http://www.mozilla.com/en-US/firefox/features.html#experience

http://www.WinBeta.Net

اخیرآ طی گزارشی بنیاد موزیلا اعلام کرد پس از گذشت 24 ساعت از انتشار نسخه جدید فایرفاکس، نزدیک به 2 میلیون نفر علاقه مند از سراسر دنیا این مرورگر صفحات وب را دانلود کردند. بدین ترتیب در هر ثانیه 30 فایرفاکس 2 دانلود شده است.

در مقایسه ی این آمار با ارقام ارائه شده برای کاوشگر اینترنت اکسپلورر نسخه 7 ، مرورگر شرکت مایکروسافت طی 24 ساعت تنها نیم میلیون مرتبه دانلود شده بود. این امر می تواند بیانگر فعال تر شدن رقیب مایکروسافت و افزایش علاقه مندان به مرورگر فایرفاکس باشد.

در زیر نگاهی خواهیم داشت به آمارهای مربوط به نگارشهای قدیمی تر فایرفاکس:

فایرفاکس 1.0: 1 میلیون دانلود در 24 ساعت نخست
فایرفاکس 1.5: 1.5 میلیون دانلود در 24 ساعت نخست
فایرفاکس 2: 2 میلیون دانلود در 24 ساعت نخست

شاید بتوان پیش بینی کرد که زمانی فایرفاکس 10 در 24 ساعت نخست به میزان 10 میلیون مرتبه دانلود شود!

http://www.mozilla.com/en-US/firefox

شرکت موزیلا در حال حاضر firefox 2 را عرضه کرده ... این نرم افزار سدی شده در برابر IE ...

فقط اینو داشته باشین که firefox3 هم تا چند ماه دیگه جاشو به ورژن قبلی خواهد داد ..

بزودی اطلاعاتی در مورد این explorer هم ارائه خواهم داد .

به نظر می آید مرورگر جدید شرکت مایکروسافت اینترنت اکسپلورر Internet Explorer 7 که در تاریخ 18 اکتبر برای استفاده در ویندوز XP ارائه شد در نخستین آزمایش امنیتی خود ناموفق عمل کرده است.

در گزارشی که موئسسه امنیتی "Secunia" در روز 19 اکتبر منتشر ساخت خاطر نشان شده است، نسخه ی طلائی مرورگر مایکروسافت در حالی به کاربران ارائه شده است که بدلیل وجود نواقص امنیتی می تواند منجر به حملات از نوع (spoofing attacks) شود.

پیش از این وجود چنین آسیب پذیری در ماه آپریل نیز گزارش شده بود اما مایکروسافت آنرا هرگز برای اینترنت اکسپلورر 6 برطرف نساخت و اکنون نسخه جدید اینترنت اکسپلورر 7 را منتشر نموده است.

هرچند که امکان نوشتن کد مخربی که بتواند از این آسیب پذیری برای مقاصدی همچون حملات spoofing و یا phishing استفاده نماید تقریبآ ناممکن خوانده می شود اما افراد سوء استفاده کننده می توانند هنگامی که کاربر قصد مشاهده یک سایت را دارد سایتی مشابه با آنرا به او نشان دهند و سپس از این طریق به فریب وی بپردازند