Sometimes referred to as earphones, headphones are a hardware device that either plugs into your computer (line out) or your speakers and allow you to privately listen to audio without disturbing anyone else. In the picture to the right, is a visual example of a USB headset from Logitech with a microphone. A popular solution for computer gaming.
- Welcome to Daffodil Computers Ltd..
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#22
Web Cameras / What is Webcam
March 29, 2013, 10:09:55 PM
A webcam is a hardware camera connected to a computer that allows anyone connected to the Internet to view either still pictures or motion video of a user or other object. In the picture to the right, is a Logitech QuickCam Express and an example of what a webcam may look like. Today, most webcams are either embedded into the display with laptop computers or connected to the USB or Firewire port on the computer.
#23
Projectors / What is Projector?
March 29, 2013, 10:08:20 PM
An output device that can take the display of a computer screen and project a large version of it onto a flat surface. Projectors are often used in meetings and presentations to help make sure everyone in the room can view the presentation. In the picture to the right, is a ViewSonic projector and an example of what a projector may look like. Projectors used with computers are small devices that are rarely much larger than a toaster and typically weigh a few pounds.
#24
Scanners / Plustek OpticSlim 2600 A4 1200dpi Flatbed Scanner Plustek OpticSlim 2600 A4 1200
March 29, 2013, 10:06:06 PM
Price : 3,600
Businesslink Computers Ltd.
BS Bhaban (2nd Floor), 75 Science Laboratory Road, Dhaka-1205.
ElephantRoad, Dhaka, Bangladesh
: Md. Shohel Chowdhury
Tel : 02-9673979-80, 01711818783, 01730731006
Email : [email protected]
#25
E-mail / Return your mail-Some time send mistake mail, no problem solution here
March 27, 2013, 09:00:20 AM
অনেক সময় মেইল পাঠানোর পড় মনে হয়, মেইলটা সঠিক জায়গায় যায় নাই। তবে আপনি ইচ্ছা করলে নিচের পদ্ধতিটি করতে পারেন। মেইল পাঠানোর পর ও ফিরিয়ে আনতে পারবেন।
ছবি দেখতে প্রবলেম হলে: ctrl + your mouse scroll bar up & down
ছবি দেখতে প্রবলেম হলে: ctrl + your mouse scroll bar up & down
#26
Computer Tips & Tricks / পিসির ড্রাইভগুলো ওপেন হচ্ছে না ?? সমাধান নিন
March 25, 2013, 07:46:03 AM
অনেক সময় ভাইরাসের জন্য আমাদের পিসির ড্রাইভগুলো ওপেন হয় না । ওপেন করতে গেলেই দেখায় open with । এটা আসলেই একটা বিরক্তিকর অবস্থা । এটা হয় সাধারণত autorun ভাইরাসের জন্য । তাই আমাদের পিসির c,d,f বা এই জাতীয় ড্রাইভগুলো যখনই ওপেন করতে চাই আমরা ব্যর্থ হয়ে থাকি । তাই আজকে দেখব কিভাবে এটার একদম সহজ সমাধান করতে পারবেন ।
নিচে সহজ সমাধানগুলো দেয়া হল :
ক ) Run এ গিয়ে টাইপ করুন cmd ( দেখবেন কমান্ড প্রমোট ওপেন হয়েছে ) ।
খ ) এবার টাইপ করুন cd\ তার পরে ইন্টার চাপুন । ( কোটেশন দিবেন না ) ।
গ ) এবার আপনার ভাইরাস আক্রান্ত ড্রাইভ এর নাম দিন , যদি সি ড্রাইভ হয় তাহলে C: লিখে ইন্টার দিন ।
ঘ ) এবার টাইপ করুন attrib -r -h -s autorun.inf.
ঙ ) এবার টাইপ করুন del autorun.inf.
ব্যস আপনার কাজ শেষ । আপনি এখন নিচিন্তে আপনার সব ড্রাইভগুলো ওপেন করুন ।
নিচে সহজ সমাধানগুলো দেয়া হল :
ক ) Run এ গিয়ে টাইপ করুন cmd ( দেখবেন কমান্ড প্রমোট ওপেন হয়েছে ) ।
খ ) এবার টাইপ করুন cd\ তার পরে ইন্টার চাপুন । ( কোটেশন দিবেন না ) ।
গ ) এবার আপনার ভাইরাস আক্রান্ত ড্রাইভ এর নাম দিন , যদি সি ড্রাইভ হয় তাহলে C: লিখে ইন্টার দিন ।
ঘ ) এবার টাইপ করুন attrib -r -h -s autorun.inf.
ঙ ) এবার টাইপ করুন del autorun.inf.
ব্যস আপনার কাজ শেষ । আপনি এখন নিচিন্তে আপনার সব ড্রাইভগুলো ওপেন করুন ।
#27
Computer Tips & Tricks / Font তৈরী করুন নিজেই
March 25, 2013, 07:45:31 AM
আমরা যারা বাংলা কম্পিউটিং করতে আগ্রহী তাদের কাছে ফ্রন্ট মুল বিষয় ।বাংলায় অনেক ফ্রন্ট বিনামূল্যে পাওয়া যায় তবে তা কি নিজের মতো কিংবা নিজে হাতের লেখার মতো হবে ? আমার মতো দেখতে যেমন কেউ নাই পৃথিবীতে তেমনি আমার হাতের লেখাও কারো সাথে মিলবে না ।যদি এমন হয় আমার হাতের লেখা অক্ষর গুলো কীবোর্ডের মাধ্যমে লেখা যায় তো মন্দ হতোনা।ফ্রন্ট তৈরী করার সফট টি আপনাকে সে সুযোগ করে দিবে ।http://www.ziddu.com/download/11008146/FontCreatorProv6.0build106GiovanniMoretti.rar.html কিলি্ক করে সফটি নামানো যাবে।আপনাকে প্রথমে কীবোর্ড লে-আউট তৈরী করতে হবে তারপর আপনার অক্ষর গুলো ডিজাইন করে সফটে ইনপুট করুন এবং মার্জিত ভাবে আপনার ডিজাইন করা অক্ষর গুলো আপনার কীবো্র্ড এর লে-আউট অনুসারে বসান আর যদি ইচ্ছে করেন আপনার হাতের লেখাগুলো scanner সাহায্য scan করে ইনপুট করতে পারেন কিংবা বিভিন্ন ছবি তৈরী করা সফট ও ব্যবহার করে আপনার অক্ষর গুলো ডিজাইন করতে পারেন।আপনার তৈরী ফ্রণ্ট বাংলা অক্ষর গুলো কে আরো সহজ ও সুন্দর করবে ।সফটটি কী জন্য এখানে কিল্কি করুন।
#28
Computer Tips & Tricks / কম্পিউটার রিস্টার্ট কেন হয় ?
March 25, 2013, 07:44:50 AM
অনেক সময় কাজ করতে করতে পার্সোনাল কম্পিউটার (পিসি) আচমকা রিস্টার্ট (বন্ধ হয়ে পুনরায় চালু হওয়া) হয়ে যায়। এতে অনেকেই ঘাবড়ে যান। কিছু বিষয় খেয়াল করলেই রিস্টার্টের কারণ বুঝতে পারবেন। যেমন—
* যদি উইন্ডোজ চালুর পর বারবার রিস্টার্ট হতে থাকে তবে প্রসেসরের কুলিং ফ্যান ঠিকমতো ঘুরছে কি না দেখুন। কুলিং ফ্যান ঘুরতে সমস্যা হলে সিপিইউ পর্যাপ্ত তাপ বের করে দিতে পারে না, ফলে অনেক সময় পিসি রিস্টার্ট হয়। ফ্যানটিতে ময়লা জমেছে কি না সেটাও খেয়াল করুন।
*RAM সমস্যার কারণে এটি হতে পারে।
* ভাইরাসের কারণেও অনেক সময় পিসি আচমকা রিস্টার্ট হয়। এই আশঙ্কা এড়াতে কম্পিউটার নিয়মিত হালনাগাদ অ্যান্টিভাইরাস সফটওয়্যার দিয়ে পরীক্ষা (স্ক্যান) করুন।
* উইন্ডোজের সিস্টেম ফাইলে ত্রুটি দেখা দিলে এই সমস্যা হতে পারে। এ রকম হলে নতুন করে উইন্ডোজ সেটআপ দিতে হবে।
* পিসিতে নতুন কোনো যন্ত্রাংশ যোগ করার কারণেও এ সমস্যা হতে হতে পারে। এ রকম মনে হলে যন্ত্রাংশটি ওই ড্রাইভার আনইনস্টল করতে হবে।
* বিদ্যুতের ভোল্টেজ ওঠানামার কারণে টা হতে পারে।
* সিপিইউর যন্ত্রাংশে প্রচুর ধুলাবালি জমার কারণেও অনেক সময় এ সমস্যা হতে পারে।
* যদি উইন্ডোজ চালুর পর বারবার রিস্টার্ট হতে থাকে তবে প্রসেসরের কুলিং ফ্যান ঠিকমতো ঘুরছে কি না দেখুন। কুলিং ফ্যান ঘুরতে সমস্যা হলে সিপিইউ পর্যাপ্ত তাপ বের করে দিতে পারে না, ফলে অনেক সময় পিসি রিস্টার্ট হয়। ফ্যানটিতে ময়লা জমেছে কি না সেটাও খেয়াল করুন।
*RAM সমস্যার কারণে এটি হতে পারে।
* ভাইরাসের কারণেও অনেক সময় পিসি আচমকা রিস্টার্ট হয়। এই আশঙ্কা এড়াতে কম্পিউটার নিয়মিত হালনাগাদ অ্যান্টিভাইরাস সফটওয়্যার দিয়ে পরীক্ষা (স্ক্যান) করুন।
* উইন্ডোজের সিস্টেম ফাইলে ত্রুটি দেখা দিলে এই সমস্যা হতে পারে। এ রকম হলে নতুন করে উইন্ডোজ সেটআপ দিতে হবে।
* পিসিতে নতুন কোনো যন্ত্রাংশ যোগ করার কারণেও এ সমস্যা হতে হতে পারে। এ রকম মনে হলে যন্ত্রাংশটি ওই ড্রাইভার আনইনস্টল করতে হবে।
* বিদ্যুতের ভোল্টেজ ওঠানামার কারণে টা হতে পারে।
* সিপিইউর যন্ত্রাংশে প্রচুর ধুলাবালি জমার কারণেও অনেক সময় এ সমস্যা হতে পারে।
#29
Computer Tips & Tricks / How to disable restrict USB/Flash Drive
March 25, 2013, 07:43:26 AM
Click Start, and then click RunType regedit, then click OK. (Or simply open registry)
Navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor
In the right pane, double-click Start.
In the Value data box, change its value to 4, which was 3 and then click OK.
basujon.wordpress.com/
Navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor
In the right pane, double-click Start.
In the Value data box, change its value to 4, which was 3 and then click OK.
basujon.wordpress.com/
#30
Computer Tips & Tricks / Increase your PC performance
March 25, 2013, 07:42:27 AM
ডিস্ক ডিফ্রাগমেন্ট করুন নিয়মিত
পিসিতে প্রচুর পরিমাণে ফাইল থাকে, যা কাজের কারণে পিসিকে প্রচুর পরিমাণ ফাইল প্রসেস করতে হয়। প্রসেসের মাঝে ফাইলগুলো অনেক ভাগে বিভক্ত হয়ে যায়। এর ভগ্নাংশ ফাইলগুলো অগোছালো হয়ে যায়। এই অগোছালো ফাইলগুলো পিসির গতি রোধ করে দেয়। ভগ্নাংশ ফাইলগুলো খুঁজে বের করার জন্য আবার জোড়া লাগিয়ে দেয়ার জন্য উইন্ডোজে আছে উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার। আপনার উইন্ডোজে উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার খুঁজে পাওয়ার জন্য যান start>All Program>Accessories>System Tools এই প্যাথে।
উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার থাকার পরও ডিস্ক ডিফ্রাগমেন্টার হিসেবে Defraggler নামক সফটওয়্যারটি ব্যবহার করা ভালো। Defraggler ডাউনলোড করার জন্য এই লিঙ্কে যান : http://www.filehippo.com/download_defraggler
আপনি কখন কখন পিসি ডিফ্রাগমেন্ট করবেন?
—যখন আপনি অনেক বড় কোনো ফাইল সেইভ করেন আপনার পিসিতে।
—ডিস্কে ১৫ শতাংশের বেশি ফ্রি স্পেস থাকবে।
—যখন কোনো সফটওয়্যারের নতুন ভারসন ইন্সটল করবেন অথবা নতুন উইন্ডোজ ইন্সটল করবেন।
পিসিতে প্রচুর পরিমাণে ফাইল থাকে, যা কাজের কারণে পিসিকে প্রচুর পরিমাণ ফাইল প্রসেস করতে হয়। প্রসেসের মাঝে ফাইলগুলো অনেক ভাগে বিভক্ত হয়ে যায়। এর ভগ্নাংশ ফাইলগুলো অগোছালো হয়ে যায়। এই অগোছালো ফাইলগুলো পিসির গতি রোধ করে দেয়। ভগ্নাংশ ফাইলগুলো খুঁজে বের করার জন্য আবার জোড়া লাগিয়ে দেয়ার জন্য উইন্ডোজে আছে উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার। আপনার উইন্ডোজে উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার খুঁজে পাওয়ার জন্য যান start>All Program>Accessories>System Tools এই প্যাথে।
উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার থাকার পরও ডিস্ক ডিফ্রাগমেন্টার হিসেবে Defraggler নামক সফটওয়্যারটি ব্যবহার করা ভালো। Defraggler ডাউনলোড করার জন্য এই লিঙ্কে যান : http://www.filehippo.com/download_defraggler
আপনি কখন কখন পিসি ডিফ্রাগমেন্ট করবেন?
—যখন আপনি অনেক বড় কোনো ফাইল সেইভ করেন আপনার পিসিতে।
—ডিস্কে ১৫ শতাংশের বেশি ফ্রি স্পেস থাকবে।
—যখন কোনো সফটওয়্যারের নতুন ভারসন ইন্সটল করবেন অথবা নতুন উইন্ডোজ ইন্সটল করবেন।
#31
Computer Tips & Tricks / ডিস্ক ডিফ্রাগমেন্ট করুন নিয়মিত
March 25, 2013, 07:41:49 AM
পিসিতে প্রচুর পরিমাণে ফাইল থাকে, যা কাজের কারণে পিসিকে প্রচুর পরিমাণ ফাইল প্রসেস করতে হয়। প্রসেসের মাঝে ফাইলগুলো অনেক ভাগে বিভক্ত হয়ে যায়। এর ভগ্নাংশ ফাইলগুলো অগোছালো হয়ে যায়। এই অগোছালো ফাইলগুলো পিসির গতি রোধ করে দেয়। ভগ্নাংশ ফাইলগুলো খুঁজে বের করার জন্য আবার জোড়া লাগিয়ে দেয়ার জন্য উইন্ডোজে আছে উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার। আপনার উইন্ডোজে উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার খুঁজে পাওয়ার জন্য যান start>All Program>Accessories>System Tools এই প্যাথে।
উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার থাকার পরও ডিস্ক ডিফ্রাগমেন্টার হিসেবে Defraggler নামক সফটওয়্যারটি ব্যবহার করা ভালো। Defraggler ডাউনলোড করার জন্য এই লিঙ্কে যান : http://www.filehippo.com/download_defraggler
উইন্ডোজ ডিস্ক ডিফ্রাগমেন্টার থাকার পরও ডিস্ক ডিফ্রাগমেন্টার হিসেবে Defraggler নামক সফটওয়্যারটি ব্যবহার করা ভালো। Defraggler ডাউনলোড করার জন্য এই লিঙ্কে যান : http://www.filehippo.com/download_defraggler
#32
Computer Tips & Tricks / Find out disc error-ডিস্ক এরর খুঁজে বের করুন
March 25, 2013, 07:40:43 AM
ডিস্ক ক্লিনআপ ও ডিফ্রাগমেন্ট ছাড়াও ডিস্কের এরর বের করে সেগুলো ফিক্স করাও জরুরি পিসির গতি বাড়ানোর জন্য ও পিসি ঠিক রাখার জন্য। পিসি ব্যবহারের মাধ্যমে ডিস্কের মাঝে অনেক ব্যাড সেক্টর তৈরি হয়। ব্যাড সেক্টরগুলোর কারণে পিসি অনেক ধীরগতির হয়ে যায় ও ঠিকমত কাজ করতে পারে না। ব্যাড সেক্টরগুলো ঠিক করার জন্য উইন্ডোজে আছে উইন্ডোজ এরর চেকিং ইউটিলিটি। এটি দিয়ে ব্যাড সেক্টরগুলো ঠিক করতে পারবেন। যদি আপনি প্রতিদিন পিসি ব্যবহার করেন তাহলে সপ্তাহে কমপক্ষে একবার উইন্ডোজ এররর চেকিং ইউটিলিটি ব্যবহার করা উচিত। উইন্ডোজ এররর চেকিং ইউটিলিটি চালু করার জন্য ড্রাইভের ওপর মাউসের ডান পাসের বাটনে প্রেস করে Properties-এ ক্লিক করুন। তারপর Tools ট্যাবে প্রবেশ করে Check Now-এ ক্লিক করুন। এখানে দেখেন Automatically Fix file system error। যদি মনে করেন, আপনার ব্যাড সেক্টর থাকতে পারে কেবল তাহলেই অপশন টি টিক দিবেন।
যদি কোনো ব্যাড সেক্টর পায় তবে সফটওয়্যারটি জানিয়ে দিয়ে যদি Automatically Fix file system error-এ টিক না দেয়া থাকে। আর মনে রাখবেন, এই প্রসেস করার আগে পিসির সব কাজ বন্ধ করে নিবেন। না হলে ঠিকমত কাজ করতে পারে না।
উইন্ডোজ ৭-এ আপগ্রেড করুন
পিসিতে যদি উইন্ডোজ ৭-এর নিচের ভারসন ইন্সটল করা থাকে তাহলে বেটার পারফরমেন্স পাওয়ার জন্য উইন্ডোজ ৭-এ পিসিকে উপগ্রেড করা ভালো।
যদি কোনো ব্যাড সেক্টর পায় তবে সফটওয়্যারটি জানিয়ে দিয়ে যদি Automatically Fix file system error-এ টিক না দেয়া থাকে। আর মনে রাখবেন, এই প্রসেস করার আগে পিসির সব কাজ বন্ধ করে নিবেন। না হলে ঠিকমত কাজ করতে পারে না।
উইন্ডোজ ৭-এ আপগ্রেড করুন
পিসিতে যদি উইন্ডোজ ৭-এর নিচের ভারসন ইন্সটল করা থাকে তাহলে বেটার পারফরমেন্স পাওয়ার জন্য উইন্ডোজ ৭-এ পিসিকে উপগ্রেড করা ভালো।
#33
Computer Tips & Tricks / Burn Disk any software-কোন প্রকার সফটওয়্যার ছাড়া রাইট করুন আপ&#
March 19, 2013, 09:35:03 AM
কোন প্রকার সফটওয়্যার ছাড়া রাইট করুন আপনার ফাইল। একেবারেই সত্যি। আমি এটি করেছি অপারেটিং সিস্টেম 7 এর মাধ্যমে। কারন অনেক সময় দেখা যায়, হাতের কাছে রাইট করার কোন সফট থাকে না। এটি এক্সপিতেও করতে পারবেন। তাহলে দেখা যাক কি ভাবে করবেন।
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কষ্ট করে পড়ার জন্য ধন্যবাদ। প্রবলেম হলে বলবেন।
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কষ্ট করে পড়ার জন্য ধন্যবাদ। প্রবলেম হলে বলবেন।
#34
Basic Knowledge of Computer / Computer Parts
March 12, 2013, 09:34:53 AM| SN Item Name Description Quantity Price 01 Processor 02 Mother Board 03 HDD 04 RAM 05 Casing 06 Keyboard 07 Mouse 08 Power Supply 09 UPS 10 Scanner 11 Monitor 12 Webcam 13 Modem 14 Lane Card 15 Sound Card 16 Pen drive 17 Hub 18 Switch 19 Router 20 Headphone 21 Capture Card 22 Bluetooth 23 DVD Writer 24 TV Card 25 Speaker 26 Graphics Card 27 Printer 28 Card reader 29 Cable 30 |
#35
Internet Problem/solutions and Guide / Quickly open your webpage
March 04, 2013, 08:50:54 AM
আমরা যখন কোনো ওয়েবসাইটে প্রথমবার যাই (ভিজিট) তখন সেটির সবকিছু আসতে (লোড হতে) সময় বেশি নেয়। ওয়েবসাইট দেখার সফটওয়্যার (ব্রাউজার) ওই সাইটসম্পর্কিত তথ্য (ডেটা) হার্ডড্রাইভে সংরক্ষণ করে রাখলে পরেরবার সাইটটি খোলার সময় পাতাগুলো দ্রুত চলে আসে। ব্রাউজার ক্যাশিংয়ের কারণে এটি হয়ে থাকে। ক্যাশিংয়ের জন্য হার্ডডিস্ক ড্রাইভের পরিবর্তে যদি র্যাম নির্বাচন করে দেওয়া যায় তবে ক্যাশিংয়ের গতি নিশ্চিতভাবে বেড়ে যায়। এতে করে ওয়েবসাইট দেখার কাজটা দ্রুত করা যায়।
মজিলা ফায়ারফক্স ব্রাউজারের ক্ষেত্রে এ কাজটা করতে অ্যাড্রেসবারে about:config লিখে এন্টার করুন। এখানে "I'll be careful, I promise!" বোতামে ক্লিক করুন। search ঘরে browser.cache লিখে এন্টার করুন। browser.cache.disk.enable খুঁজে বের করে তাতে দুবার ক্লিক করে এর মান false করে দিন। browser.cache.memory.enable-এর মান true করে দিন। এবার যেকোনো জায়গায় ডান ক্লিক করে New থেকে Integer-এ নির্বাচন করুন। এখানে browser.cache.memory.capacity লিখে OK চাপুন। পরের ঘরের ১০০০০ (১০০ মেগাবাইট) লিখে OK চাপুন। আবারও Search-এর ঘরে Pipelining লিখে এন্টার দিন। এবার network.http.pipelining খুঁজে বের করে তাতে দুবার ক্লিক করে এর মান false থেকে true করে দিন। network.http.pipelining.maxrequests-এর মান ৪ থেকে ১০-এর মধ্যে যেকোনো সংখ্যা নির্ধারণ করে দিন। কাজ শেষ হলে ফায়ারফক্স বন্ধ করে আবার চালু করুন। এখন থেকে ওয়েবসাইটের পাতাগুলো আগের চেয়ে আরও দ্রুত আসবে।
—মো. রাকিবুল হাসান -
See more at: http://www.prothom-alo.com/detail/date/2013-03-04/news/333665#sthash.TkawBYot.dpuf
মজিলা ফায়ারফক্স ব্রাউজারের ক্ষেত্রে এ কাজটা করতে অ্যাড্রেসবারে about:config লিখে এন্টার করুন। এখানে "I'll be careful, I promise!" বোতামে ক্লিক করুন। search ঘরে browser.cache লিখে এন্টার করুন। browser.cache.disk.enable খুঁজে বের করে তাতে দুবার ক্লিক করে এর মান false করে দিন। browser.cache.memory.enable-এর মান true করে দিন। এবার যেকোনো জায়গায় ডান ক্লিক করে New থেকে Integer-এ নির্বাচন করুন। এখানে browser.cache.memory.capacity লিখে OK চাপুন। পরের ঘরের ১০০০০ (১০০ মেগাবাইট) লিখে OK চাপুন। আবারও Search-এর ঘরে Pipelining লিখে এন্টার দিন। এবার network.http.pipelining খুঁজে বের করে তাতে দুবার ক্লিক করে এর মান false থেকে true করে দিন। network.http.pipelining.maxrequests-এর মান ৪ থেকে ১০-এর মধ্যে যেকোনো সংখ্যা নির্ধারণ করে দিন। কাজ শেষ হলে ফায়ারফক্স বন্ধ করে আবার চালু করুন। এখন থেকে ওয়েবসাইটের পাতাগুলো আগের চেয়ে আরও দ্রুত আসবে।
—মো. রাকিবুল হাসান -
See more at: http://www.prothom-alo.com/detail/date/2013-03-04/news/333665#sthash.TkawBYot.dpuf
#36
Basic Knowledge of Computer / Online GIF annimation
February 22, 2013, 08:28:04 PM #37
Online Education / Fundamentals of Online Education: Planning and Application
February 15, 2013, 08:14:39 AM #38
Hardware Problem/Solutions / Hard Drive Data Recovery - What Is It?
February 15, 2013, 08:12:16 AM
Hard drive data recovery is a method used to get back data and information from a corrupt or faulty hard drive. Under normal circumstances, the drive cannot be accessed by the computer and needs specialist tools. The problem with the disk could be physical damage or faults, logical or data corruption or device misconfiguration due to user error that has cause the data to be lost.
Most modern hard disks have moving parts inside (apart from SSD drives). Common physical issues include motors stopping working or jamming of the components. Any physical damage to the hard drive could lead to data loss or corruption. Losses that are caused by logical faults are more common and include issues caused by power outage, computers crashing and continued problems with computer hardware. Any of these things can cause bad data to be written to the hard disk, increasing the possibility of data loss.
An average Joe computer user will not be able to recover information from a hard drive with a physical fault. The internal components of a disc can be degraded by dust if the cover is taken off the drive for any reason. If the issue is a physical fault, the only option you have is to send the disk to a specialist data recovery company who will be able to help. Companies that specialise in this field will have dedicated "clean rooms" where the hard disk can be disassembled and repaired whist maintaining it's integrity.
If the problem is logical, such as a attempting to recover a deleted file, the end user can use many different software tools available to them at little cost (or free). This data recovery software will also help you recover from virus infections, system crashes and accidental configuration changes that end up losing data.
These are most commonly used to un-format a hard disk where someone has accidentally deleted the main system partitions, get back a deleted file, access a non-bootable or unresponsive hard disk or USB memory drive or gain access to files that were created on different operating systems.
The software is also designed to be very non-technical and can be used by the average computer user without any problems. Some of this kind of software also creates automatic backups of your data as you go along, so it's use is invaluable for most people.
Many people do not take data loss seriously. Think about how many digital photos you have on your computer. The components, including the hard drive are not meant to last for ever. Make sure you back up as often as possible to help prevent against data loss.
Article Source: http://ezinearticles.com/5302391
Most modern hard disks have moving parts inside (apart from SSD drives). Common physical issues include motors stopping working or jamming of the components. Any physical damage to the hard drive could lead to data loss or corruption. Losses that are caused by logical faults are more common and include issues caused by power outage, computers crashing and continued problems with computer hardware. Any of these things can cause bad data to be written to the hard disk, increasing the possibility of data loss.
An average Joe computer user will not be able to recover information from a hard drive with a physical fault. The internal components of a disc can be degraded by dust if the cover is taken off the drive for any reason. If the issue is a physical fault, the only option you have is to send the disk to a specialist data recovery company who will be able to help. Companies that specialise in this field will have dedicated "clean rooms" where the hard disk can be disassembled and repaired whist maintaining it's integrity.
If the problem is logical, such as a attempting to recover a deleted file, the end user can use many different software tools available to them at little cost (or free). This data recovery software will also help you recover from virus infections, system crashes and accidental configuration changes that end up losing data.
These are most commonly used to un-format a hard disk where someone has accidentally deleted the main system partitions, get back a deleted file, access a non-bootable or unresponsive hard disk or USB memory drive or gain access to files that were created on different operating systems.
The software is also designed to be very non-technical and can be used by the average computer user without any problems. Some of this kind of software also creates automatic backups of your data as you go along, so it's use is invaluable for most people.
Many people do not take data loss seriously. Think about how many digital photos you have on your computer. The components, including the hard drive are not meant to last for ever. Make sure you back up as often as possible to help prevent against data loss.
Article Source: http://ezinearticles.com/5302391
#39
Hardware Problem/Solutions / Hard Drive Crash? The Essential Data Recovery Report
February 15, 2013, 08:11:18 AM
Your worst nightmare just became a horrifying reality. You keep hearing that little voice in your head mockingly shout "you should have backed that stuff up" The voice keeps echoing throughout your head as you perform a quick inventory all of the important information that you just lost.....your client database, a years worth of e-mail, your entire inventory database, even your family photos.
Even worse, you've got a deposition in two-weeks and key information needed to help win the case were also lost. You quickly call a service technician and have them come over to check the computer out, only to hear the worst news of all....your data has been lost. When a hard drive crashes, it's too late to worry about what you "should have done."
Today data recovery is a multi-million dollar industry. The number of data recovery firms out there seems to exceed the number of fast food restaurants for the entire planet. These companies specialize in helping their clients retrieve data on anything from hard drives to flash-roms. In the following report, we will discuss what data recovery really is; the different types, the costs, and what you can realistically expect when it comes to getting your data recovered.
What To Do In The Event Of Data Loss?
Around 44% of all data loss is caused by hardware failure. It's important to make sure that you immediately shut your system down if you suspect that hard drive has crashed. Don't even try to go through the shutdown procedure, just pull the plug from the wall. Do not try to run off the shelf data recovery software or drive utilities. Many times these applications will assume the drive is functioning properly and will increase the risk of permanent data loss.
Types Of Hard Drive Failure
When we discuss data recovery in this report, we will primarily focus on issues surrounding hard drive failures; since these types of failures are most common. There are really two primary forms of failure in a hard drive, logical and physical. Logical failures are usually a result of file-system corruption. This can occur due to a virus, accidental deletion of key files or registry components, and in some cases even electro-static discharge. In most cases where a logical failure has occurred, the drive is still recognized by the system BIOS, but it will not boot. In most cases, your data should still be intact on the drive, even though it may appear to be inaccessible.
If the system BIOS does not detect the presence of the hard drive, then chances are a physical failure has occurred. Physical failures can result from a wide variety of causes. There are really two sub-categories for physical hard drive failures; mechanical and electronic. Mechanical failures usually result from a failure of the spindle motor. Spindle motor failure can result from excessive heat due to a bearing failure. The increased heat resulting from the bearing failure will expand the drive shaft and therefore seize the spindle motor. Suddenly, your drive will become inoperative. Occasionally, you will get a warning that something bad is about to happen. You may hear a loud whining, a grinding noise, even high-pitched screeches. If anything like this starts to occur, BACK UP YOUR DATA IMMEDIATELY.
Another physical issue that sometimes rears its ugly head is an electronic failure. If you look at a hard drive you will notice a circuit board on the bottom. This board is basically the brains of the drive, and it is where the computer interfaces to the hard drive. An electrical failure can occur unexpectedly at any time. Even brand new hard drives are not totally immune to having electrical failures. Sometimes it's just a faulty component, sometimes it's improper installation (i.e. electro-static discharge, grounding out the board, damaging circuitry during installation). It's important to also keep your system clean and well ventilated, since excessive heat can damage the electrical components on the drive. If you have a system that is in a somewhat contained area, you may look at adding an additional 80mm fan to cool the internal components of the system, especially the hard drive. No other component of a computer works as much as the hard drive, and therefore it is vitally important not to overlook it when cooling issues arise.
How Is My Data Recovered?
One of the most often asked questions that customers ask is, "how do you get my data back?" Well, it's really not black magic or rocket science. It's just a matter of having the right tools and the knowledge necessary to know what to do, much like a surgeon performing heart by-pass surgery. Many prominent data recovery facilities have a large array of hardware, software and tools for recovering data.
Generally speaking when a hard drive is received by a data recovery firm, the first thing they do is evaluate it, and determine what recovery solution will be necessary. If the drive failure is a logical issue as mentioned earlier, then a scan of the drive will be performed to try and repair the file system corruption. Sometimes a partition can be repaired and the drive restored to the status that it was before the failure. If this is not possible, then a very low-level scan will be performed that essentially searches every sector of the hard drive for files. Once the files are located, they can then be copied to the media of choice, i.e. a CD-ROM, DVD-ROM or another hard drive. Logical recoveries can take up an enormous amount of time, especially if the drive is on the verge of physical failure. It's not uncommon to
allow for one day of scanning and a day for recovering the found files.
If the drive has suffered a physical failure, then the recovery procedure is quite a bit more challenging. As mentioned above, there are really two sub-categories of physical failure; mechanical and electronic. An important element in recovering data from a physical failure is having the necessary parts to get the drive functioning again. Unfortunately with hard drives if you have a 20GB Maxtor Hard Drive for example, then you will need another identical 20GB Maxtor Hard Drive for salvaging parts. In cases where the electronic circuit board has failed on the hard drive, then you have to have the exact same circuit board on hand in order to retrieve the necessary circuit components for replacement. Many times you cannot even exchange circuit board for circuit board. These repairs generally require soldering skills and a thorough knowledge of electronics to be successfully completed. You will most likely hear "Class100 Clean Room" thrown around a lot when talking to data recovery professionals. Simply stated, a Class100 Clean Room maintains exceptional air purity, and contains less than 100 airborne particles larger than 0.5 microns in each cubic foot of air. This is vital in protecting sensitive internal components of hard drives. Anytime a hard drive is having an invasive procedure performed on it, a Class100 clean room or better is needed.
The time frame for recovery is generally 5-10 business days for physical issues and 2-4 days for logical issues. Sometimes if components are not readily available, then it may take weeks to complete the recovery. Some firms offer expedite service and you definitely pay for this added attention.
What About Data Recovery Software
This is one area where you really do get what you pay for. Try to stay away from software in the $20-$60 range, since these utilities are generally very limited in what they can do. Also make sure that you NEVER and just to emphasize, NEVER EVER get data recovery software that writes anything at all to the damaged disk. You run the risk of overwriting data that may otherwise have been recoverable, but will be lost forever. If you are fairly computer savvy, then there are a few good data recovery software solutions available.
What To Look For When Shopping For Data Recovery
There's an old saying, "you get what you pay for." In most cases this is true. However, just because a company with a fancy website quotes you $3,500 for data recovery, does not mean that they are any better than a company that quotes you $1,500. Also, try to stay away from companies that want to charge $50-$300 for evaluating your drive. There has been a movement in the data recovery industry over the last couple of years to offer a number of free services. Most reputable data recovery companies will evaluate standard IDE drives free of charge; so don't let the word "free" this or "free" that stop you. The data recovery market is quickly becoming saturated, and a company does not necessarily cheapen itself or lack expertise by offering free evaluations.
You will find as you shop around for data recovery that prices vary greatly. You will get quotes that range from $300 to $5,000 for standard hard drive recoveries. It's not uncommon to literally get quotes that have at least a $1,500 high/low spread. We shopped one prominent data recovery company where we gave them specific indicators of a physical hard drive failure. We were eventually quoted a price range of $600 to $2,900 for the recovery. Many times this is a bait and switch type tactic. They get you to send in the drive with the low-end $600 price, then they let you know it's going to cost $2,100 for the recovery. You end up being well under the $2,900 high-end price, but well over what other reputable companies would charge. Since most customers won't go through the pain of having the drive sent back, only to have to send it out to another company, these bait and switch companies end up making huge profits off of unsuspecting customers.
Try to find a company that will give you an up front cost for either a logical or physical recovery. Most companies will be able to tell you within a couple hundred dollars the cost of a recovery. However, don't misunderstand a company that gives you a price for two different procedures. For example, some companies will give you a price if the failure is logical and a price if the problem ends up being physical. We called one firm and were told that if the drive had a logical failure the price would be $400 and if it ended up being a physical issue the price would be $1,600. This is not a high/low spread as mentioned in the earlier example, this is simply quoting a price for two different types of recoveries.
On average you can expect to pay anywhere from $400 to $600 for logical recoveries, and $1,200 to $2,000 for physical recoveries on standard IDE hard drives. If you have RAID drives, SCSI, etc. depending on the configuration prices can be as high as $15,000. Remember, backup backup backup backup backup!!
Can My Data Be Recovered?
In most cases the answer to this question is yes. On average, the success rate for data recovery professionals is about 75-85%. However, there are times when the data is just lost, either due to extensive damage to the platter or unavailability of replacement parts.
How Do I Get Started?
If you have a hard drive that has crashed, the most important thing you can do is contact a data recovery professional immediately. Make sure you aren't being charged an evaluation fee if you have a standard IDE hard drive. Most companies only charge evaluation fees for complex RAID and network server drives.
It is important to do your homework, call and talk with the companies. When you find one that you feel comfortable with, give them a chance. Your hardest job, may be finding data recovery firms that actually have someone available to answer the phones. Ask questions and be sure to have the following information available:
Size of the drive
Operating system (i.e. Windows 98, Windows XP, etc.)
Situation of failure (what happened just before the drive stopped working)
Is the drive recognized by the computer or not
Article Source: http://ezinearticles.com/7377
Even worse, you've got a deposition in two-weeks and key information needed to help win the case were also lost. You quickly call a service technician and have them come over to check the computer out, only to hear the worst news of all....your data has been lost. When a hard drive crashes, it's too late to worry about what you "should have done."
Today data recovery is a multi-million dollar industry. The number of data recovery firms out there seems to exceed the number of fast food restaurants for the entire planet. These companies specialize in helping their clients retrieve data on anything from hard drives to flash-roms. In the following report, we will discuss what data recovery really is; the different types, the costs, and what you can realistically expect when it comes to getting your data recovered.
What To Do In The Event Of Data Loss?
Around 44% of all data loss is caused by hardware failure. It's important to make sure that you immediately shut your system down if you suspect that hard drive has crashed. Don't even try to go through the shutdown procedure, just pull the plug from the wall. Do not try to run off the shelf data recovery software or drive utilities. Many times these applications will assume the drive is functioning properly and will increase the risk of permanent data loss.
Types Of Hard Drive Failure
When we discuss data recovery in this report, we will primarily focus on issues surrounding hard drive failures; since these types of failures are most common. There are really two primary forms of failure in a hard drive, logical and physical. Logical failures are usually a result of file-system corruption. This can occur due to a virus, accidental deletion of key files or registry components, and in some cases even electro-static discharge. In most cases where a logical failure has occurred, the drive is still recognized by the system BIOS, but it will not boot. In most cases, your data should still be intact on the drive, even though it may appear to be inaccessible.
If the system BIOS does not detect the presence of the hard drive, then chances are a physical failure has occurred. Physical failures can result from a wide variety of causes. There are really two sub-categories for physical hard drive failures; mechanical and electronic. Mechanical failures usually result from a failure of the spindle motor. Spindle motor failure can result from excessive heat due to a bearing failure. The increased heat resulting from the bearing failure will expand the drive shaft and therefore seize the spindle motor. Suddenly, your drive will become inoperative. Occasionally, you will get a warning that something bad is about to happen. You may hear a loud whining, a grinding noise, even high-pitched screeches. If anything like this starts to occur, BACK UP YOUR DATA IMMEDIATELY.
Another physical issue that sometimes rears its ugly head is an electronic failure. If you look at a hard drive you will notice a circuit board on the bottom. This board is basically the brains of the drive, and it is where the computer interfaces to the hard drive. An electrical failure can occur unexpectedly at any time. Even brand new hard drives are not totally immune to having electrical failures. Sometimes it's just a faulty component, sometimes it's improper installation (i.e. electro-static discharge, grounding out the board, damaging circuitry during installation). It's important to also keep your system clean and well ventilated, since excessive heat can damage the electrical components on the drive. If you have a system that is in a somewhat contained area, you may look at adding an additional 80mm fan to cool the internal components of the system, especially the hard drive. No other component of a computer works as much as the hard drive, and therefore it is vitally important not to overlook it when cooling issues arise.
How Is My Data Recovered?
One of the most often asked questions that customers ask is, "how do you get my data back?" Well, it's really not black magic or rocket science. It's just a matter of having the right tools and the knowledge necessary to know what to do, much like a surgeon performing heart by-pass surgery. Many prominent data recovery facilities have a large array of hardware, software and tools for recovering data.
Generally speaking when a hard drive is received by a data recovery firm, the first thing they do is evaluate it, and determine what recovery solution will be necessary. If the drive failure is a logical issue as mentioned earlier, then a scan of the drive will be performed to try and repair the file system corruption. Sometimes a partition can be repaired and the drive restored to the status that it was before the failure. If this is not possible, then a very low-level scan will be performed that essentially searches every sector of the hard drive for files. Once the files are located, they can then be copied to the media of choice, i.e. a CD-ROM, DVD-ROM or another hard drive. Logical recoveries can take up an enormous amount of time, especially if the drive is on the verge of physical failure. It's not uncommon to
allow for one day of scanning and a day for recovering the found files.
If the drive has suffered a physical failure, then the recovery procedure is quite a bit more challenging. As mentioned above, there are really two sub-categories of physical failure; mechanical and electronic. An important element in recovering data from a physical failure is having the necessary parts to get the drive functioning again. Unfortunately with hard drives if you have a 20GB Maxtor Hard Drive for example, then you will need another identical 20GB Maxtor Hard Drive for salvaging parts. In cases where the electronic circuit board has failed on the hard drive, then you have to have the exact same circuit board on hand in order to retrieve the necessary circuit components for replacement. Many times you cannot even exchange circuit board for circuit board. These repairs generally require soldering skills and a thorough knowledge of electronics to be successfully completed. You will most likely hear "Class100 Clean Room" thrown around a lot when talking to data recovery professionals. Simply stated, a Class100 Clean Room maintains exceptional air purity, and contains less than 100 airborne particles larger than 0.5 microns in each cubic foot of air. This is vital in protecting sensitive internal components of hard drives. Anytime a hard drive is having an invasive procedure performed on it, a Class100 clean room or better is needed.
The time frame for recovery is generally 5-10 business days for physical issues and 2-4 days for logical issues. Sometimes if components are not readily available, then it may take weeks to complete the recovery. Some firms offer expedite service and you definitely pay for this added attention.
What About Data Recovery Software
This is one area where you really do get what you pay for. Try to stay away from software in the $20-$60 range, since these utilities are generally very limited in what they can do. Also make sure that you NEVER and just to emphasize, NEVER EVER get data recovery software that writes anything at all to the damaged disk. You run the risk of overwriting data that may otherwise have been recoverable, but will be lost forever. If you are fairly computer savvy, then there are a few good data recovery software solutions available.
What To Look For When Shopping For Data Recovery
There's an old saying, "you get what you pay for." In most cases this is true. However, just because a company with a fancy website quotes you $3,500 for data recovery, does not mean that they are any better than a company that quotes you $1,500. Also, try to stay away from companies that want to charge $50-$300 for evaluating your drive. There has been a movement in the data recovery industry over the last couple of years to offer a number of free services. Most reputable data recovery companies will evaluate standard IDE drives free of charge; so don't let the word "free" this or "free" that stop you. The data recovery market is quickly becoming saturated, and a company does not necessarily cheapen itself or lack expertise by offering free evaluations.
You will find as you shop around for data recovery that prices vary greatly. You will get quotes that range from $300 to $5,000 for standard hard drive recoveries. It's not uncommon to literally get quotes that have at least a $1,500 high/low spread. We shopped one prominent data recovery company where we gave them specific indicators of a physical hard drive failure. We were eventually quoted a price range of $600 to $2,900 for the recovery. Many times this is a bait and switch type tactic. They get you to send in the drive with the low-end $600 price, then they let you know it's going to cost $2,100 for the recovery. You end up being well under the $2,900 high-end price, but well over what other reputable companies would charge. Since most customers won't go through the pain of having the drive sent back, only to have to send it out to another company, these bait and switch companies end up making huge profits off of unsuspecting customers.
Try to find a company that will give you an up front cost for either a logical or physical recovery. Most companies will be able to tell you within a couple hundred dollars the cost of a recovery. However, don't misunderstand a company that gives you a price for two different procedures. For example, some companies will give you a price if the failure is logical and a price if the problem ends up being physical. We called one firm and were told that if the drive had a logical failure the price would be $400 and if it ended up being a physical issue the price would be $1,600. This is not a high/low spread as mentioned in the earlier example, this is simply quoting a price for two different types of recoveries.
On average you can expect to pay anywhere from $400 to $600 for logical recoveries, and $1,200 to $2,000 for physical recoveries on standard IDE hard drives. If you have RAID drives, SCSI, etc. depending on the configuration prices can be as high as $15,000. Remember, backup backup backup backup backup!!
Can My Data Be Recovered?
In most cases the answer to this question is yes. On average, the success rate for data recovery professionals is about 75-85%. However, there are times when the data is just lost, either due to extensive damage to the platter or unavailability of replacement parts.
How Do I Get Started?
If you have a hard drive that has crashed, the most important thing you can do is contact a data recovery professional immediately. Make sure you aren't being charged an evaluation fee if you have a standard IDE hard drive. Most companies only charge evaluation fees for complex RAID and network server drives.
It is important to do your homework, call and talk with the companies. When you find one that you feel comfortable with, give them a chance. Your hardest job, may be finding data recovery firms that actually have someone available to answer the phones. Ask questions and be sure to have the following information available:
Size of the drive
Operating system (i.e. Windows 98, Windows XP, etc.)
Situation of failure (what happened just before the drive stopped working)
Is the drive recognized by the computer or not
Article Source: http://ezinearticles.com/7377
#40
Hardware Problem/Solutions / Top Problems That Could Crash Your Computer
February 15, 2013, 08:10:10 AM
There are several problems that could crash your computer. Most of these problems are caused by application incompatibility or incorrect system settings. In some cases, the crashes are caused by physical defects in your computer. Understanding the common reasons of a computer crash will help you to prevent it from happening in the future.
Conflicting Hardware
Hardware conflicts could instantly send your computer into tumble mode. If there are lots of devices connected to your CPU, then some may conflict when you activate them simultaneously. Remember that your hardware shares the resources of your machine and the operating system. If there is a conflict, your operating system may not be able to handle them thus forcing your computer to crash in order to recover.
Defective RAM and Hard Disk
Bad RAM and faulty hard drive are two of the most common causes of computer crashes. The RAM or memory card enables your computer to read and process data. If it suffers from hiccups or if there are physical defects on your RAM, then your system will be severely handicapped which could crash your computer. Ideally, the RAM has an optimum lifespan of two years. You need to replace it regularly with a new one to avoid system crashes.
Disk drive malfunction is a very dangerous problem. A faulty hard drive will not only cause computer crashes but you can also lose data if your system will not be able to recover. The common cause of hard drive problem is corrupted file system. You can reformat the hard drive to fix the problem. A physical damage is more difficult to solve. You may have to replace your hard disk just to prevent crashes and data loss.
Other Common Causes of Computer Crashes
If your computer is infected with malware, then there is good chance that you will experience frequent crashes. There are flavors of malware that can consume 100 percent of your computer's resources. This will result to system hang, freezes, and eventual crashes. A crash can also happen due to overheating CPU. You can prevent this by installing additional system fans to keep your CPU cooler.
Article Source: http://ezinearticles.com/3708006
Conflicting Hardware
Hardware conflicts could instantly send your computer into tumble mode. If there are lots of devices connected to your CPU, then some may conflict when you activate them simultaneously. Remember that your hardware shares the resources of your machine and the operating system. If there is a conflict, your operating system may not be able to handle them thus forcing your computer to crash in order to recover.
Defective RAM and Hard Disk
Bad RAM and faulty hard drive are two of the most common causes of computer crashes. The RAM or memory card enables your computer to read and process data. If it suffers from hiccups or if there are physical defects on your RAM, then your system will be severely handicapped which could crash your computer. Ideally, the RAM has an optimum lifespan of two years. You need to replace it regularly with a new one to avoid system crashes.
Disk drive malfunction is a very dangerous problem. A faulty hard drive will not only cause computer crashes but you can also lose data if your system will not be able to recover. The common cause of hard drive problem is corrupted file system. You can reformat the hard drive to fix the problem. A physical damage is more difficult to solve. You may have to replace your hard disk just to prevent crashes and data loss.
Other Common Causes of Computer Crashes
If your computer is infected with malware, then there is good chance that you will experience frequent crashes. There are flavors of malware that can consume 100 percent of your computer's resources. This will result to system hang, freezes, and eventual crashes. A crash can also happen due to overheating CPU. You can prevent this by installing additional system fans to keep your CPU cooler.
Article Source: http://ezinearticles.com/3708006