Wednesday, 24 June 2015

INSIDE THE ZUMWALT DESTROYER

INSIDE THE ZUMWALT DESTROYER.         
THE U.S. NAVY'S MOST FUTURISTIC WARSHIP FINALLY HITS THE WATER.


Zumwalt In Maine
 The U.S. Navy's Zumwalt destroyer, the most technologically advanced warship ever built and the first of its eponymous class, was set to be christened October 19, but then politics intervened. Late last month, the U.S. Navy finally launched the Zumwalt from a shipyard in Maine (though without a baptismal spray of champagne). Popular Science reported on the Zumwalt's incredible strength and stealth last year; check out the details, including how the warship might have changed the course of a historic Korean War battle, in our October 2012 cover story.

I went to Raytheon's Seapower Capability Center in Portsmouth, RI, to get a look inside the futuristic destroyer. The Zumwalt isn't there; it's waiting at Bath Iron Works in Maine. Instead, I'm here to see a mock-up of the bridge, the command center where sailors send and receive communications, plot courses, direct weapons, and generally see to the operations of the ship.

Zumwalt In Maine

 The U.S. Navy's Zumwalt destroyer, the most technologically advanced warship ever built and the first of its eponymous class, was set to be christened October 19, but then politics intervened. Late last month, the U.S. Navy finally launched the Zumwalt from a shipyard in Maine (though without a baptismal spray of champagne). Popular Science reported on the Zumwalt's incredible strength and stealth last year; check out the details, including how the warship might have changed the course of a historic Korean War battle, in our October 2012 cover story.
I went to Raytheon's Seapower Capability Center in Portsmouth, RI, to get a look inside the futuristic destroyer. The Zumwalt isn't there; it's waiting at Bath Iron Works in Maine. Instead, I'm here to see a mock-up of the bridge, the command center where sailors send and receive communications, plot courses, direct weapons, and generally see to the operations of the ship.

Mock-up Of Zumwalt Bridge
Apart from the metal staircase on the left side, at first glance the bridge could be mistaken for a modern office of a graphic design firm. Rows of computer stations, each with three monitors, all face toward three large projections of the Zumwalt's location—in this demonstration, the ship is parked off the coast of South Carolina, vigilantly guarding Fort Sumter.

My guides frowned upon Star Trek comparisons.

Besides the usual keyboard, trackball, and touchscreen, each computer station has a joystick. A Raytheon employee told me the joysticks aren't yet mapped to any function, but they could be configured to pilot drones. Poking around the central screen at one of the stations configured for weapons, I found a display map, flight paths, and a series of concentric circles representing incoming vehicles: gray for initiating contact, yellow for warning, and red for opening fire. More information about specific systems (the weapons used, sensors, engines) appears on the side monitors.
And that's the bridge. Nineteen sailors per shift will control the ship from here, and computers will do the rest. The Zumwalt is expected to have a crew of only 154, about half that of the Arleigh Burke-class destroyers currently in service. What makes this possible is a tremendous degree of automation. Everything, from the valves leading to the showers to the turrets for the guns, is hooked into what's called the Total Ship Computing Environment. (My guides frowned upon Star Trek comparisons.) Rather than feeding the raw data from a pressure sensor in a pipe back to an engineer, the relevant computer responds accordingly, and then informs the crew member watching the pipes that the change happened.
Crew members will live relatively well. At the lowest rank, there will be four sailors per stateroom (and bathroom). The ship design calls for libraries and lounges, and there's additional sleeping space and room for other military personnel the Zumwalt might want to take aboard for special purposes. More on that later.

The Brains Of The Zumwalt

All this computing power comes from large boxes (see image above) called Electronic Modular Enclosures. Each of the 16 on board the Zumwalt contains 235 electronics cabinets, consolidating a lot of computer systems into a larger module that's protected from the rigors of life at sea. Inside the enclosures are many parts available to commercial businesses, like IBM Blade servers, which are much cheaper and easier to replace than rugged equipment specially made for naval use. Navy vessels are expected to serve for decades, but computer technology moves much much faster than that. To upgrade the electronics on the Zumwalt, individual modular enclosures can be pulled out, replaced by more modern parts, and reinstalled with much less fuss than renovation usually entails.
The ship's electricity comes from gas-powered turbines, which together generate up to 78 megawatts of power. Under normal conditions, the operating systems of the ship and the engines use only 20 of those megawatts, so the ship has 58 left over for weapons. Especially future weapons: Railguns and lasers, both long in development for the Navy, could find a home on board the Zumwalt, which has more than enough electricity to meet these weapons' intense energy demands.
Zumwalt Missile Ports
Of course, future weapons alone do not a warship make. The Zumwalt will enter service armed with two long-range guns that fire guided artillery shells up to 72 miles away, two smaller guns to protect the Zumwalt from ships that get too close, and 80 different missile launch points, grouped in 20 sets of four. You can read more about the Zumwalt's weapon systems in our October 2012 feature.

It shows up on radar as nothing larger than a small fishing vessel.
Having the weapons to hit something is, at most, half the battle. Stealth is just as important. The Zumwalt's weird construction—sharp edges and sloping surfaces—mean that, according to Raytheon, it shows up on radar as nothing larger than a "small fishing vessel," despite being 610 feet long and displacing 15,000 tons of water. It has both the medium-frequency sonar typical of surface ships and the high-frequency sonar common in submarines. The onboard radar can simultaneously perform broad sweeps and narrow scanning. There's also a system of electronic eyes that catch both visual and infrared light and then analyze the images to determine if anything seen is a threat and warrants notifying a sailor on watch.
Besides the tools for naval battle, the Zumwalt has a helipad big enough for either two helicopters or a helicopter and a vertical-takeoff drone. There's enough room on the Zumwalt to house two helicopter or drone crews, as well as room for two helicopters' worth of special forces, if need be. The V-22 Osprey, while a staple of vertical takeoff and tricky deployments, is too large and heavy for the Zumwalt's landing pad, but for most purposes, helicopters will be fine. Thanks to the ship's sensors, defenses, and stealth, it might very well get special forces into otherwise difficult-to-reach places.

Zumwalt Undergoing Construction

Star Trek Into Darkness, released this summer, features a warship called the Dreadnought that's heavily automated and designed to run on a very minimal crew. When, toward the end of my visit, I asked my hosts at Raytheon what they thought of this comparison, I was met with a hearty chorus of "no comment."
The U.S. Navy, on the other hand, seems ready for the science fiction comparisons. It looks like the first commander of the Zumwalt will be Captain James Kirk.

Tuesday, 9 June 2015

BLACK SOLAR CELLS REACH INCREDIBLE NEW EFFICIENCY RECORD.

BLACK SOLAR CELLS REACH INCREDIBLE NEW EFFICIENCY RECORD.

Solar Panels
Renewable energy is the future. All over the world cities and countries are vowing to go quit fossil fuels and commit to getting their energy fix from 100 percent renewable sources.

One of the most popular renewable options is solar—especially in areas that are, well, sunny. But in order to capture sunlight and turn it into electricity, you need solar cells, also known as photovoltaic cells.
With solar cells of particular interest to researchers, businesses, environmental groups, and just about everybody else, it always seems like there are new advances in research. Just last week, researchers at Aalto University published a paper in Nature Nanotechnology announcing that they created a black silicon solar cell with an efficiency of 22.1 percent. What does that mean, exactly? It sounds good, and Black Silicon would be a great name for a rock band, but how does it compare with everything else in the wide world of solar power?
Here are three of the most common types of solar cells that you might hear about, and what they do:

Crystalline Silicon: These are the solar cells dominating the MARKET right now. In 2011, 90 percent of all solar cells were made from crystalline silicon. They can convert sunlight into electricity at a rate of 25 percent in ideal conditions. This is what other types of solar cells are measuring themselves against. The downside is these versions tend to be bulky.

Thin Film: Thin-film solar cells are less expensive to produce than crystalline silicon solar cells. Made from cadmium compounds, these cells are around 75 times thinner and can absorb sunlight better than silicon. Their flexibility and low weight makes them ideal as unobtrusive energy collectors. So why aren’t they at the top of the heap? Because they aren’t as good at converting sunlight to electricity as their crystalline silicon competitors… yet. Last year in the lab, thin-film technology reached a high of 20.4 percent efficiency. Not bad.

Black Silicon: Black silicon solar cells are similar to crystalline silicon solar cells. Really similar. The difference is that black silicon solar cells are treated so that they appear to be black on the surface. Why is that a big deal? Think of wearing a black T-shirt on a hot summer day. The black color tends to absorb more sunlight, which translates to an uncomfortable summer afternoon for you, but more energy gathered for a solar cell. It’s an attractive option for areas that don’t get as much sunlight but still want to make good use of the light they do receive. Until now, turning silicon cells black tended to undercut their efficiency at turning sunlight into power, however. That’s why the new paper, showing an efficiency of 22.1 percent is promising.

Monday, 8 June 2015

Why Tesla Energy could be the biggest technology leap in 20 years

Why Tesla Energy could be the biggest technology leap in 20 years.

The PowerWall is a life changing product that can bring electricity supply to remote parts of the world.

A lot of people have ideas. However, rarely they are able to execute them and see them to fruition. That's what separates Elon Musk from most technology executives. Yes, we've had the likes of Steve Jobs, Bill Gates and Larry Page, but Elon is still different in an awesome way.

All of them have spoken about changing the world and perhaps all have done so in their own way. With Google, Larry Page has brought information to the masses with search; with Microsoft, Bill Gates brought computing to the masses and Steve Jobs reinvented how we listened to music, used the computer and the mobile phone.

But all these leaps were possible because of Intel co-founder Gordon Moore's prediction back in 1965. Now famously known as "Moore's Law", he predicted that the transistors in the microprocessor will double every year, hence doubling performance without increasing the cost. This spawned the age of the computer, the mobile phone and so forth, which enabled innovations at Microsoft, Apple and Google and many other tech companies.

What Musk is doing with Tesla Energy is not based on Moore's Law. Musk is reinventing the battery. With the solar powered PowerWall and PowerPack, he's decoupling you from the power grid. Yes, this is a massive leap in battery technology, which, by the way, does not follow Moore's Law as it is only restricted to semiconductors.

Musk spoke about the battery and one would not realise how revolutionary his announcement is. Frankly, a battery is not a glamorous product like an iPhone or an iWatch, but its impact will be lasting if Musk can live up to his promise.

So why do I believe this? The answer is simple. The PowerWall, which is a solution made for homes, is an elegant looking battery that stands vertically up against a wall offering 10 kWh in a weekly cycle and 7 kWh in a daily cycle. Tesla claims this solution should be enough to power most homes during peak evening hours. And both solutions cost $3,500 and $3,000 respectively.

As it is a 100 kg, 51.2 inch tall solution, it can fit in any home. It gets its energy from solar panels that will be installed on a terrace or roof so basically, yeah, it can fit anywhere. Also if you feel, 7 kWh or 10 kWh is less, you can daisy chain up to 9 PowerWalls together for up to 90 kWh.

The math is simple. Your fridge consumes the most power. On an average, it will consume 4.8 kWh per day according to Tesla. If you're in India, particularly in Delhi, you probably have an AC too, which will consume a similar amount of power if used all day long. Other things like your laptop, lights and TV can all be covered within 2 kWh and that's also an extreme number.

So we're talking about two PowerWalls costing $7,000 or around Rs 4.5 lakhs for a fully autonomous renewable energy solution for which Tesla will service the product for 10 years. Just do the math on your monthly electricity bill and figure out the ramifications of what Elon Musk is offering you.

This is an economic solution for an upper middle class family in New Delhi, and comes with massive environmental benefits. Leave redundancy, Tesla Energy is perhaps about self sufficiency.

Just imagine this product being in the remote parts of the country that are not connected to the grid - those remote parts of UP where Rahul Gandhi spent his time at homes that don't have electricity supply. The PowerWall will eliminate this. This is a life changing product, not for India, but for the world. The remote parts of Africa could be energised with this fully autonomous battery solution.

Musk's ambition for this project is boundless. With the Powerpack, Tesla is providing solution for industrial purposes that is infinitely scalable. It has 100 kWh battery blocks that can scale to 10 mWh or higher. This is potentially a micro grid, which can power a city or more. According to Musk, with 160 million PowerPacks, you could power the entire US and with 2 billion PowerPacks, the entire world could run on limitless renewable energy. Imagine that.

Have your say. You can comment here.Musk has already started the journey as he is building a GigaFactory, the first of many, in Nevada. This battery technology has the potential to change the world like no other product and you probably don't know about it because it is a battery - and it's not glamorous.

It is also ironic that Tesla, named after the legendary Nikolai Tesla, started off as a car company and is finally taking a leap towards energy, something that Tesla was known for. Nikolai would be smiling somewhere up there.

Saturday, 6 June 2015

10 Interesting Facts On India That You Had No Idea About.a

10 Interesting Facts On India That You Had No Idea About.

"India is, the cradle of the human race, the birthplace of human speech, the mother of history, the grandmother of legend, and the great grandmother of tradition. Our most valuable and most instructive materials in the history of man are treasured up in India only."
These are not our words. These are the words of the great Mark Twain. And here are 25 Indians facts to support his statement:

The human calculator:
Shakuntla Devi was given this title after she demonstrated the calculation of two 13 digit numbers: 7,686,369,774,870 × 2,465,099,745,779 which were picked at random. She answered correctly within 28 seconds. 
The human calculator

The father of India's missile programme had visited Switzerland back in 2006. Upon his arrival, Switzerland 
declared May 26th as Science Day.
Science day in Switzerland is dedicated to Ex-Indian President, APJ Abdul Kalam
In September 2009, India's ISRO Chandrayaan- 1 using its Moon Mineralogy Mapper detected water on the moon for the first time.
Water on the moon was discovered by India

Shampoo was invented in India, not the commercial liquid ones but the method by use of herbs. The word 'shampoo' itself has been derived from the Sanskrit word champu, which means to massage.
Shampooing is an Indian concept
At an altitude of 2,444 meters, the Chail Cricket Ground in Chail, Himachal Pradesh, is the highest in the world. It was built in 1893 and is a part of the Chail Military School.
The highest cricket ground in the world
It took a total of 2,57,00,000 man hours for completion and also weighs as much as 50,000 African elephants. A true engineering and architectural marvel.
Bandra Worli Sealink has steel wires equal to the earth's circumference
Mawsynram, a village on the Khasi Hills, Meghalaya, receives the highest recorded average rainfall in the world. Cherrapunji, also a part of Meghalaya, holds the record for the most rainfall in the calendar year of 1861.
The wettest inhabited place in the world

The 2011 Kumbh Mela was the largest gathering of people with over 75 million pilgrims. The gathering was so huge that the crowd was visible from space.
Kumbh Mela gathering visible from space
India has the largest postal network in the world with over 1, 55,015 post offices. A single post office on an average serves a population of 7,175 people. The floating post office in Dal Lake, Srinagar, was inaugurated in August 2011.


A floating post office