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Showing posts from January, 2014

What is energy and where does it come from?

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To recognize sources of energy effectually, we need to understand what energy is and how it works. Energy is important and very much essential in our daily life, without energy we are paralyzed totally. We can say it is embodied in everything we use everyday.
Actually energy comes from countless sources and in many forms. Many sources of energy are still being under researched and tested. Technologies are developing frequently to improve energy sources. All energies are not ready yet for commercial usages. Generally the forms of energy are categorized as:
Potential Energy:Potential energy is energy which stored in an object, like Chemical, mechanical, nuclear, gravitational, and electrical energy.
Kinetic Energy:Kinetic energy which does the work, like heat, Light, motion, and sound energy.
Here is an example for clear the idea. Pulling a concrete block in height gives it a potential to fall down again. When you pull a concrete block in a certain height then it stored gravitational poten…

Most Viewed 10 Beautiful Images

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Most viewed and beautiful images are available in various wave, here are 10 most viewed images are collected for you from Google.
I think these photos will inspire you to be start photography. So, don't wait, let click on your pretty DSLR. 
It’s easy to find yourself going round in circles when it comes to photographic equipment, and all too easy to believe that the camera gear you own is holding you back. But really, it isn’t: any camera is capable of producing a stunning picture.
The best part of having a hobby like photography is never running out of things to learn. Inspiration is all around you.












































Maya Gift

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Maya Time Period:During the Middle Preclassic Period, which lasted until about 300 B.C., Maya farmers began to expand their presence both in the highland and lowland regions. The Middle Preclassic Period also saw the rise of the first major Mesoamerican civilization, the Olmecs.
A stelle from Yaxchilan showing tribute being paid by three wise men (or one lieutenant and two prisoners, actually) to Itzamnaaj B’alam III (literally: Shield of the Sky Diety Jaguar the third).

The Maya civilization was one of the most dominant indigenous societies of Mesoamerica (a term used to describe Mexico and Central America before the 16th century Spanish conquest). Unlike other scattered indigenous populations of Mesoamerica, the Maya were centered in one geographical block covering all of the Yucatan Peninsula and modern-day Guatemala; Belize and parts of the Mexican states of Tabasco and Chiapas; and the western part of Honduras and El Salvador. This concentration showed that the Maya remained relat…

গুরুত্বপূর্ণ জব ইন্টার্ভিউ টিপস

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“আপনার নিজের সম্পর্কে কিছু বলুন” এটা খুবই কমন ও ভয়ের একটা প্রশ্ন যা প্রায় সব ইন্টার্ভিউতেই জিজ্ঞাসা করা হয় এবং এসময় প্রায় শতকরা ৪০ জনই মনে করে সুযোগটা এই বুঝি জানালা দিয়ে বের হয়ে গেল।

অভিজ্ঞ ইন্টার্ভিউ গ্রহণকারীরা বলেন এ প্রশ্ন শুনে প্রায় অর্ধেকেই অপ্রস্তুত হয়ে যায় আসলে কি বলতে হবে।

আবার শতকরা প্রায় ৩৫ জনই এটাকে একটা গুরুত্বহীন প্রশ্ন মনে করে। এমনকি অধিকাংশ অভিজ্ঞ-লোকও তাদের কর্মক্ষমতা ও অর্জন সম্পর্কে সুন্দর করে গুছিয়ে বলতে ঘাবড়ে যায় বা সামর্থ্য হয় না।

আসলে ইন্টার্ভিউ গ্রহণকারীরা প্রথম ৪/৫ মিনিট  ক্যান্ডিডেটের মানসিকতা যাচাই করার জন্য এধরনের প্রশ্ন করে থাকেন। ক্যান্ডিডেট এর মাইন্ড-আপ সংক্রান্ত জটিলতা কাটানোর উপায় সংক্রান্ত ইদানীং অনেক মোবাইল অবশ্য বের হয়েছে।

ইন্টার্ভিউ দিতে আসা অধিকাংশ-জনেরই ধারনা, ইন্টার্ভিউ গ্রহণকারীরা তার বায়ো-ডাটা ও কভার লেটার পড়ে ইতিমধ্যে তার সম্পর্কে অনেক জেনেছেন। কিন্তু তারা বায়ো-ডাটা থেকে শুধু বিষয়ভিত্তিক জেনেছেন, সাক্ষাতকার থেকে তারা জানতে চাচ্ছেন উক্ত পদের জন্য ক্যান্ডিডেট কিভাবে ও কতটা উপযোগী। তারা ক্যান্ডিডেটকে কর্মক্ষেত্রের একটি কাল্পনিক পরিবেশ প্রদর্শন করে…

Difference Between Lightning and Surge Arrester

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Difference between lightning arrester and surge arrester:If you ask a question ''what is the difference between lightning arrester and surge arrester," answer will be vary  from man to man depending on his field of work or his experienced field. We can go some answer:

Lightning arrestor is to provide some degree of protection from Lightning induced problems. Surge arrestor is used to try to limit damaging surges, they can be against current surge, but more usually Voltage surges. . . Could be used on 5V supplies, 12V supplies, Mains 120V or other supply lines. . . Even used on Telephone lines. . . . It all depends on what you want to protect and from what ?
Lightning Arrestors are located at highest elevations of the protected premises and are aimed to direct the discharged currents of lightning strikes through intended circuit to the ground (rather than for instance through the steel structures of a building). Surge Arrestors are voltage limiting devices that are installe…

INSPECTION TESTING AND PACKING OF 33KV CABLES

Cable and Cable Accessories Packing and Post Landing Inspection Procedure for Underground Cable Project
PackingThe Cable Drum shall be covered by steel sheet to protect from external thrust. All goods are to be export-packed and properly protected for shipment, rough transportation and storage.
Each set of jointing kits shall be sealed in waterproof polyethylene bag having a silica gel packet placed inside the unit and then packed in polystyrene foam gasket closed by self adhesive tape.  Rating of the unit shall be marked by marker pen or label on the foam for easy identification.
Maximum 10 (ten) sets of Jointing kits are allowed to pack into separate wooden packaging box lined with heavy gauge polyethylene.
Between the cartoons, a suitable packing material for protection and preventing their movement should be used. Each box shall have an individual waterproof, transparent and heavy gauge polyphone wrapper and bitumen paper and then packed into a five-ply paper carton for Boxes. Sili…

TECHNICAL SPECIFICATION FOR 33 KV, XLPE COPPER CABLE

Required Technical Specification for 33 KV, XLPE, ICX800 sq.mm Copper Core Underground Cable
General Requirements
Where a Manufacturer's Standard or a national Standard equal to or better than the appropriate specified standard has been issued and is acceptable to the Purchaser, any material or goods supplied shall be manufactured. Installed and tested in accordance with the latest revision of the relevant standard unless otherwise specified.
Where any Standard referred to in this Specification has been superseded by a new standard prior to date letter or invitation to tender, the reference shall be deemed to be to such superseding standard.
Deviations from this Specification or standards referred to above shall be given in the bid shall be accepted by the Purchaser before contract placement.
The goods shall be designed to ensure continuity of service under all working condition at the site as the first consideration and to facilitate inspection, maintenance and repairs. All electrica…

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