What is DSLR (Digital Single-Lens Reflex)?

             Digital Single-Lens Reflex

DSLR is a digital camera that uses mirrors to direct light from the lens to the viewfinder, which is a hole on the back of the camera that you look through to see what you are taking a picture of.

• With an SLR camera, you see exactly what the lens sees
• You can change the lens on a digital SLR
• Digital SLRs have large image sensors that produce high-quality photos
• An SLR has a near-zero lag time, and is ideal for action photography

The light we see when we look through the viewfinder on our SLR camera and the light that hits the image sensor when we make an exposure comes through a single lens. This might seem obvious until you consider that not all cameras work this way.Some cameras have two lenses – one through which the exposure is made and another, either above or to one side, that enables you to see through and compose the photograph.Essentially, since there is only a single lens, “what you see is what you get.”

         Reflex gives us a clue as to how using the same lens to see through and also make the exposures is possible – reflection.     

         SLR camera mirror------- there is a mirror placed at a 45 degree angle directly in the path of the light through the lens. This reflects the light upwards where it enters another reflective assembly above the mirror which corrects the image (remember, it’s been reflected!) and then directs it out of the viewfinder and into your eye.

 Normal light path (red line, simplified) through a DSLR camera.

1. Think of it like a periscope in reverse – in principle it’s not really that different. But what happens when we want to make an exposure? Well, quite simply, the mirror moves out of the way when you press the shutter button and lets the light hit the sensor behind it.
2. Light path (blue line) to the sensor when the shutter button is pressed. Imagine that the mirror is moved up and out of the way.

When SLR cameras first appeared one of the main advantages was that they were significantly less bulky than some of their twin-lens alternatives. Today, with the advent of small mirror-less cameras, this is no longer true and SLR cameras are among the largest a typical consumer would consider buying.

They are, however, still a popular choice and indeed the preferred choice among professionals. There are numerous reasons for this – but the main reason specifically related to the SLR design is that when you look through the viewfinder, what you see is very close to what you get in the exposure. This is a very important advantage for working photographers and for those who simply do not wish to deal with any potential margin for error.

MEDITATION

The rest in meditation is deeper than the deepest sleep that you can ever have. When the mind becomes free from agitation, is calm and serene and at peace, meditation happens.

Meditation is seen by a number of researchers as potentially one of the most effective forms of stress reduction.while stress reduction techniques will use to control the mind.

Meditation helps to reduce so many growing emphasis:

1. Quality of life outcomes.
2. Concepts such as psychonueroimmunilogy & Mind-Bodymedicine.
3. Reduce healthcare costs.
4. Suggest the stress reduction and improving  mental health are become increasingly relevant to healthcare.

In today's world where stress catches on faster than the eye can see or the mind can perceive, meditation is no more a luxury. It is a necessity. To be unconditionally happy and to have peace of mind, we need to tap into the power of meditation.

10 places to See Before You Die.

10 places you See Before You Die.


1.Venice( ITALY)

If there were a more romantic place on earth than the canals of Venice, surely we’d see that destination replicated in every casino the world over. But since there are arguably more faux canals and Roman statues in global casinos than anything else, it’s safe to say that the real Venice is the romantic winner. And why wouldn’t it be? Who doesn’t want to transport themselves into a gondola for a lazy ride around the “floating city” past its famed Gothic and Byzantine palazzos, bohemian shops and alluring cafes? This city is an engineering marvel, a marble masterpiece, and a sight that won’t be around forever.

2.TAJ MAHAL(INDIA)

If ever there was a more beautiful monument to love than India’s Taj Mahal, it has long since faded to dust. Mughal emperor Shah Jahan commissioned this immense marble-white mausoleum in memory of his beloved third wife, Mumtaz Mahal, in 1632. The resulting structure, designed by Afghan Ustad-Ahmad Lahori, has been called the jewel of Muslim art in India, an architectural masterpiece and one of the most romantic buildings in the world.

3.FRANCE(paris)

When Gustave Eiffel announced that he would build the tallest tower in the world for the 1889 World’s Fair, he expected a euphoric response. What he got instead was skepticism, virulent criticism and even protests “on artistic grounds.”  History, however, would prove his critics to be a pack of fools. The Eiffel Tower is now not only the world’s most-visited paid monument, but also its most valuable at $561.9 billion, according to a 2012 report, making it a crucial cog in the French economy and one of the most beloved sites in Europe.

4.Athens(Greece)

Athens is a city reformed thanks to fortunes brought by the 2004 Summer Olympics. Spotless parks and streets, an ultra-modern metro, new motorways, an accessible airport and all signs in perfect English make the city easily negotiable. Meriting more than a stopover en route to the islands, sophisticated Athens sites include many pillars of Western history, from the Acropolis to the Temple of Olympian Zeus, as well as treasures in the National Archaeological Museum.

The heritage of the classical era is still evident in the city, represented by ancient monuments and works of art, the most famous of all being the Parthenon, considered a key landmark of early Western civilization. The city also retains Roman and Byzantine monuments, as well as a smaller number of Ottoman monuments.

5.Machu Picchu(peru)

Machu Picchu is so well-known and so certain to fill travellers with high expectations that you might think it's doomed to disappoint. No other South American archaeological site comes close when it comes to visitor numbers and broad appeal (coach tourists mingle with backpackers and hardcore hikers at the ruin every day of the year). Only Sacsayhuamán in Cuzco - which is usually part of a Machu Picchu itinerary - is comparable for sheer scale and architectural audacity. "But with a bit of careful planning and the right approach, you will find the site as enchanting and engaging as any on the planet."

6.GERMANY

World-famous Museumsinsel, or Museum Island, lies between the River Spree and the Kupfergraben - a 400-meter-long canal off the river - and includes many of Berlin's oldest and most important museums. The heart of this pedestrian-friendly district is the Old Museum, constructed in 1830 as a place to exhibit the royal treasures. Soon after, the land behind the museum was set aside for art and the "knowledge of antiquity."





The Rhine is Europe's most important waterway, and its most beautiful. With a total length of 1,320 kilometers, this magnificent river stretches from Switzerland through Germany all the way to the Netherlands.








7.Switzerland

Tired of the hustle and bustle of urban living? Tired of hour-long commutes into work? Want to just get away from it all? Wengen, Switzerland is the place for you.

Firstly, cars of any kind have been banned for more than 100 years. The town is tucked away between alpine mountains and lush, grassy hills in every direction, while the air is crisp and clean, un-polluted by the diesel and muck of a city. Perched in the heart of the Alps, the popular tourist spot also has some of the world’s finest ski slopes.

8.EGYPT

Prepare to be truly struck by awe if you make the trip to Cairo, Egypt. As the 18th largest city in the world, Cairo is both a standing artifact of a past world, while still embracing a modern aura. Cairo’s main attraction is – of course – the Great Pyramids of Giza and Sphinx, the lone survivor of the original Seven Wonders of the World. Book a hotel on the bed of the Nile River – the same place where the earliest civilizations first settled. Also, travelers are welcome to take a tour of Cairo’s surroundings by way of camel; the same means of travel used thousands of years ago.

While Cairo is a must-see location, you may want to wait a while before booking that flight. The U.S. State Department has issued a travel alert for several regions in Egypt due to high conflict in the area.



9.Rio De Janeiro, Brazil

Quite possibly the most beautiful metropolis in the world, Rio De Janeiro intertwines the beauty of the natural world with the tempo of an urban metropolis, housing more than 6.3 million people. Here, you take in one of South America’s finest beauties on the crest of Guanabara Bay and the South Atlantic Ocean, while still embracing the festive and vibrant nightlife of Brazil’s second-largest city. If you plan on visiting this beautiful location, make sure to time your stay with Rio’s annual Carnival, the world famous festival that drapes the city with lights, music, dancing and joy. Also, don’t miss the “Christ the Redeemer” statue perched 700 meters atop Corcovado Mountain looking out over the city. If you’re planning a trip to Rio in June this year, you’ll also want to check out a soccer match in one of the 2014 World Cup’s host cities.


10.NORTHERN TERRITORY, AUSTRALIA

A World Heritage Site, Uluru is an awe-inspiring sandstone rock formation rising out of the desolate outback of Australia's Northern Territory. The name derives from the aboriginal tribes that settled in the area 10,000 years ago. The landmark is also known as Ayers Rock, named in honor of Sir Henry Ayers, who served as Chief Secretary of South Australia in the late 19th century. Jutting nearly 1,150 feet in the air, the natural monolith is taller than the Eiffel Tower, and stands in stark contrast to the miles of flat desert that surround it. Visitors can climb to the top of Uluru (the hike takes anywhere from 30 minutes to two hours) and explore the base, which is about six miles around. The view atop the rock is remarkable during sunrise and sunset.

These are my Bucket List Tooo........................... 

ANSYS (Mechanical)

                              ANSYS

ANSYS Mechanical software is a comprehensive FEA analysis (finite element) tool for structural analysis, including linear, nonlinear and dynamic studies. The engineering simulation product provides a complete set of elements behavior, material models and equation solvers for a wide range of mechanical design problems. In addition, ANSYS Mechanical offers thermal analysis and coupled-physics capabilities involving acoustic, piezoelectric, thermal–structural and thermo-electric analysis.

Superior CAD Interface & Robust Meshing Superior CAD Interface & Robust Meshing 

Existing native CAD geometry can be used directly with ANSYS structural analysis software — with no translation, no IGES and no intermediate geometry formats. ANSYS has provided native bidirectional integration with the most popular CAD systems for more than a decade. Integration directly into the CAD menu bar makes it very simple to launch world-class simulation directly from a CAD system.Since the ANSYS geometry import mechanism is common to all CAD systems, the user has the flexibility to work within a single common simulation environment while using multiple CAD packages.

The ANSYS structural analysis software suite enables you to solve complex structural engineering problems and make better, faster design decisions. With finite element analysis (FEA) tools, you can customize and automate your simulations, and parameterize them to analyze multiple design scenarios. ANSYS Structural Mechanics software easily connects to other physics analysis tools, providing even greater realism in predicting the behavior and performance of complex products.

ANSYS software with its modular structure as seen in the table below gives an opportunity for taking only needed features. ANSYS can work integrated with other used engineering software on desktop by adding CAD and FEA connection modules.

So ANSYS, which enables to simulate tests or working conditions, enables to test in virtual environment before manufacturing prototypes of products. Furthermore, determining and improving weak points, computing life and foreseeing probable problems are possible by 3D simulations in virtual environment.

What is Encryption?

                                                         ENCRYPTION

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. Using complex algorithms, the message is transformed into an illegible string of characters without the uniquely generated key. This unique key allows for the message to be  transformed back into it’s original format.

•  Encryption capabilities to help you safeguard structured and unstructured data and comply with industry and regulatory requirements. This software performs encryption and decryption operations with minimal performance impact and requires no changes to databases, applications or networks.. Encryption uses an encryption algorithm and one or more encryption keys. 

The reversible transformaphertext) as a mechanism for protecting its confidentiality, integrity and sometimes its authenticitytin of data from the original (plaintext) to a difficult-to-interpret format .

• A formula used to turn ordinary data, or "plaintext," into a secret code known as "ciphertext." Each algorithm uses a string of bits known as a "key" to perform the calculations. The larger the key (the more bits), the greater the number of potential patterns can be created, thus making it harder to break the code and descramble the contents.

• Most encryption algorithms use the block cipher method, which codes fixed blocks of input that are typically from 64 to 128 bits in length. Some use the stream method, which works with the continuous stream of input.

Using Wi-Fi to connect to the Internet is convenient, but in terms of security, there’s always a trade-off as it won't be difficult for an intruder to intercept any connection, which could result in stolen user credentials and other sensitive data. This is why many websites use a protocol called HTTPS for encrypting data that's being sent between sites. While this doesn’t necessarily guarantee absolute security, the risks are reduced as information being transmitted can only be decrypted by the site it was sent to.

When it comes to your data, the main purpose for encrypting the data stored in your computer and devices—even if you have created back-ups or secure passwords—is to ensure your privacy, protect your data, and secure intellectual property. This is also known as endpoint encryption, which basically adds an extra layer of protection for the confidential information residing on your PC and devices, data stored in removable media such as USB, CD, DVD, or specific files and folders. 

 

While encryption doesn’t magically convey security, it can still be used to protect a user's identity and privacy. If we are ever being watched, inadvertently or not, we can hide our data by using properly implemented crypto systems. According to cryptographer and security and privacy specialist Bruce Schneier, “Encryption works best if it is ubiquitous and automatic. It should be enabled for everything by default, not a feature you only turn on when you’re doing something you consider worth protecting.”

Fuel Cells

                                                              Fuel Cells

A fuel cell is basically a battery and it works in the same way as illustrated in the below flash

animation.It uses a fuel, most often hydrogen, as the electrolyte. An advantage they have over

batteries is that they do not run down.They also produce no pollutants, but will produce

water as a by-product, as well as heat.

In order to produce power, the fuel in a fuel cell has to be supplied continually. Two fuels are

needed, and the most common are hydrogen and oxygen, or air may be used. There are also

two electrodes and two screens. An electrolyte such as potassium hydroxide will fill in the gap

between the screens. The different gases are put into the fuel cell at each electrode, one

positive and one negative. This causes a chemical reaction and a direct-current voltage

is produced.

At the anode in the fuel cell, the hydrogen atoms are stripped of their electrons, leaving

only the protons. A polymer membrane separates the two electrodes, and the electrons

are then forced to ride an external circuit before they can reach the cathode. This flow of

electrons creates the electricity. In order to generate a sufficient amount of energy, a stack

of fuel cells is required. A strong reason to continue to develop fuel cell

technology is because a fuel cell is able to convert the fuel directly into electrical energy,

whereas an internal combustion engine must first convert the fuel into mechanical energy,

which can then convert it into electrical energy.

In order to make it even more efficient, various types of fuel cells are being developed.

Other types of fuel cells can also produce electricity. They use a wide variety of fuels,

such as a phosphoric acid fuel cells (PAFCs); a molten carbonate fuel cells (MCFCs) - which

operates at temperatures around 650 °C; a solid oxide fuel cells (SOFCs) - which operates at

temperatures between 800 and 1,000 °C: and more. In each fuel cell, there is a definite need

to be able to control and remove excess heat. The most practical way, which also increases

the efficiency, is to convert the heat into electricity as well. Some of these electrolytes

are liquid, but some are solids.

A powerful advantage of a fuel cell over conventional sources of power, such as coal or

gas power generation stations, is that they convert energy much more efficiently.

Naturally, when oxygen and hydrogen recombine inside, large amounts of heat and

pressure will be produced. This requires strong containers that can withstand both.

7 Joker Dialogues in Batman Movie change your Relationship.....

1. "If you are good at something, never do it for free."


When your girl is out of balance, recharge her talk plan. You're good at that and you got to do it. For FREE! This dialogue has a very deep hidden message that we all need to understand.



2. "I'm a dog chasing cars. I wouldn't know what to do with one if I caught it."

This will raise questions, many questions, as your partner might think that your relationship stability is zero as you might go out again for somebody else. Nobody likes one night sit-downs.



3. "Introduce a little anarchy . Upset the established order and everything becomes chaos."


No girl would like a guy who would be anarchist and talk about anarchy instead of Anarkali. You establish love in a relationship which should not be chaotic. This might blow up your lovely Taj Mahal.


4. "All right. So, listen. Why don’t you give me a call when you wanna take things a little more seriously? Here’s my card."


This defines your level of stupidity. LEVEL - PRO. It's your love and not your company's investor that you would throw around a card. Give your love a credit card instead. See how she would take everything seriously from there on.

5. "Madness, as you know, is a lot like gravity, all it takes is a little push."

Okay so here you are not even getting friend zoned once you guys are done. Just don't if you can't be clear. What MADNESS? What GRAVITY and BLACK HOLE? What PUSH? Talk about the BIG BANG theory before it's time, and you'll be a creep.

These one is different from the above five.........

. "You complete me."bring out these emotions

"Why so serious? Let's put a smile on that face." Learn them by Heart...$@%$$