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Sabtu, 25 Juni 2011

Online tools for free

Online tools for free


Anyone looking for productivity-related Web appsshould visit www.sciweavers.org. The sheer variety of free online tools available on the website is mindboggling. No registration is required, you don't need to download any software components and there's no waiting or limits on the number of times you can use each tool.

The naming conventions behind the tools might be a bit silly (they're collectively known as Sci2ools) but you can't argue with honest functionality. So, do you need to convert any webpage into a printer-friendly, downloadable PDF file? iWeb2Print will do it for you in two quick steps.

How about converting a webpage into a high-resolution image (any format of your choice), splitting a PDF file into smaller files or merging multiple PDFs into one? iWeb2Shot, iPDF2Split and iPDF2Merge are the tools you need.

The optical character reader (i2OCR) reads text from an image and converts it into an editable text file. The i2Type tool has an on-screen keyboard that lets you type in over 50 languages (including Indian languages) and download the text as a Word document.

And some of the more basic tools allow you to convert images from one format to another, convert almost any file to a PDF and choose from hundreds of symbols to use in a text file, email or social networking site. The only thing left to do is bookmark the URL instantly for later use.

Accelerate Android With Tips and Tricks

Accelerate Android With Tips and Tricks

Mobile phones that run Google’s Android operating system come in various shapes, sizes and features, unlike Apple’s iPhones. And whileiPhone buyers are limited to AT&T and Verizon service, Android phones are also available from Sprint, T-Mobile and Boost Mobile, where a data plan can cost as little as $35 a month.

But despite the variety of Android phones, and of carriers, there are a lot of useful features common to all. Here are some tips on finding them:
THE LONG PRESS The key to many of these tips is the long press: Instead of tapping a button, word or icon on the screen, press and hold your finger on it for two seconds. Often, this will bring up a menu of options specific to the type of item, like one to bookmark a Web link. You can also long press the hardware keys on the phone, and the background of the home screen, to reveal various options.
In general, long-press functions are intended to save you from tapping through a series of menus to perform a common task. It’s the equivalent of right-clicking your mouse on a PC screen.
So, for example, you can long press the home key on your phone’s case — the one that looks like a little house — to bring up a menu of your eight most recently used apps. This lets you hop quickly between, say, an e-mail you are composing and your Web browser.
You can also long press the search key — it looks like a magnifying glass — to pop up a microphone icon labeled “Speak Now.” Android’s Voice Commands system understands at least 10 commands, like “Send text to Alison Wright, running late will see you at 6,” “Navigate to the nearest pizza place,” “Listen to Taylor Swift,” and of course, “Note to self.” If you don’t begin with a special command, Android will assume you are speaking a Web search.
Within the browser app, long press the back key — the one labeled with an arrow U-turning left — to snap open a screen with your bookmarks, most visited pages and browsing history displayed in tabs.
Long press on your home screen’s background to bring up a menu of options that includes Shortcuts. You can create a shortcut, which looks just like an app on your home screen, that links directly to a bookmarked Web page, a person in your contact list or a navigation destination. Android will label the shortcut with the Web site’s logo, the person’s face or an icon you choose for destinations.
Too many icons on your home screen? Long press on the screen to pop up a menu that includes a Folders option. You can create a folder icon and call it, say, Games, into which you can drag all your game apps.
Long press a link on a Web page to pop up a menu that lets you open the link in a new window. To switch windows, press the menu key — the one that’s a grid of four squares — and tap Windows in the options that appear onscreen.
And long press can also be used for accent marks. To insert, say, an e with an accent grave into a message, long press the “e” on your keyboard. That pops up a menu of “e” characters with various accent marks.
FAST ACCESS TO PHONE, TEXT AND E-MAIL In your address book, don’t tap the person’s name. Tap their photo. That pops up a menu of icons to call, text or e-mail. There are also options to send messages through Twitter and Facebook.
TAKE PHOTOS OF YOURSELF Android cameras without a second camera for self-portraits have a Self Portrait mode in the camera app. Tap it, and the camera will begin searching for faces in its viewfinder using facial-recognition software. The phone will shoot a new photo of you every few seconds, adding the pictures to your camera roll. It’s more hit or miss than taking your photo in a mirror, but it’s more fun, like mugging in an old-fashioned photo booth.
FASTER SENTENCES Android picked up a trick from old-school BlackBerry phones: When typing a text or e-mail message, you don’t need to fumble for the period key at the end of a sentence. Just press the spacebar twice. Android will insert one period and one space much faster than you could type them yourself.
E-MAIL SHORTCUTS If you use Gmail on your Android phone, you can create separate shortcut icons, as described above, to specific accounts, folders and Gmail labels. This lets you have separate icons for work e-mail and personal e-mail, rather than opening whatever you last read when you tap the Gmail icon. Once you’re in the e-mail app, you can also switch folders by tapping the name of the current folder at the top of the screen.
SILENCING A CALL Most users figure out they can get rid of a phone call by sliding the red arrow that appears onscreen when the phone is ringing. But not everyone realizes you can stop the phone from ringing by pressing the power button on top of the phone or either of the volume buttons on the right.
FIND ON PAGE To search for words within a Web page, press the menu key, tap More, and then tap “Find on page.” A search box and keyboard will appear to let you type in search terms.
SHARE A PAGE ON FACEBOOK Another option on the browser’s More menu is the Share page. One of the options to share is Facebook. Tapping it will open Facebook in the browser (rather than using Facebook’s Android app) and set up the link to be shared, complete with a thumbnail image and a space to type your comments.
SEE TODAY’S DATE Android shows the time but not the date on your home screen. If you drag down the notification tray at the top of the screen, today’s date appears in the upper left corner.
FOREIGN LANGUAGE KEYBOARDS Most domestic Android phones come with only English and Spanish keyboards installed for the touch screen. To add, say, a German keyboard, go to Android Market and search for “German keyboard.” Expect to pay around $3 for most keyboard apps.
GET RID OF PESKY CALLERS Do you have a frequent caller whom you never want to answer? Add them to your address book if they’re not already there. Then edit their entry, and scroll to the bottom for the option “Additional info.” It’s tricky to open the option; you have to tap the arrow key at the right, which will pop open more options, possibly out of sight below the bottom edge of your screen. But if you scroll all the way to the bottom of the extra options, you’ll find a welcome surprise: “Send straight to voice mail?” Click once for peace of mind.
Kamis, 23 Juni 2011

Flying To Paris On Biofuels

Flying To Paris On Biofuels



SOMEWHERE OVER THE ATLANTIC ­ – I’m more than half way to Paris on the first transatlantic flight powered by biofuels and the journey has been….utterly unremarkable.

Which is exactly the point.
No modifications to Honeywell’s Gulfstream G-450 were needed before the biofuel made from camelina seed – an inedible plant – by the company’s UOP subsidiary was pumped into one of the six-year-old jet’s Rolls-Royce engines.
“The only difference is that there’s no aviation fuel smell, which the ground crew appreciates,” Ron Weight, Honeywell’s chief pilot, said before take-off Friday evening from a municipal airport near the conglomerate’s headquarters in Morristown, New Jersey.
That and the word “Experimental” emblazoned on the G4’s fuselage. The designation reflects a U.S. Federal Aviation Administration waiver that allows us to make the world’s longest renewable energy-powered flight as Honeywell’s Green Jet Fuel has not yet been approved for commercial use.
Not for long, though: final regulatory approval for this type of biofuel is expected within weeks. That will officially kick off the age of green jet travel, though it will be some years before supply ramps up to make even a dent in the 60 billion-gallon annual global market for petroleum aviation fuel.
“It’s a great way for us to celebrate the approval of the fuel and kind of usher in the next generation,” Jim Rekoske, Honeywell UOP’s vice president for renewable energy and chemicals, said as we cruised at 41,000 feet. “We’re done with the last hurdle of certification and now we’re ready to go at commercial scale and ready to move into commercial use of these fuels.”
Just about every major airline, from Air New Zealand to Virgin, has signaled strong interest in aviation biofuels. And no wonder: petroleum-based aviation fuel prices are spiking, airline profits are in a nose-dive and European limits on jet emissions take effect in 2012. Not to mention those image-conscious airline executives who would like to green up the most carbon-intensive form of travel.
As we retrace Charles Lindberg’s 1927 pioneering flight across the Atlantic to Paris, the 50-50 blend of biofuel and petroleum aviation fuel in the right engine is burning 68 percent less carbon than the fossil fuel in the left engine, according to Rekoske.
That’s because the Green Jet Fuel is essentially recycling the carbon that had already been absorbed from the atmosphere by the camelina plants before they were harvested on farmland in Montana. A company called Sustainable Oils crushed and processed the seeds, which Honeywell then refined into jet fuel at a facility in Houston.
By the time the G4 lands at the Paris Air Show, it will have saved a net 5.5 million metric tons of carbon emissions.
That should alleviate some billionaires’ guilt about the environmental price of flying luxe. (My favorite G4 touch – the electric window shades.)
In fact, the corporate jet market could be a profitable niche for Green Jet Fuel if distribution challenges can be worked out.
As dawn breaks, I pop into the G4’s cockpit to see how the biofuel-powered engine has been performing.
“It appears to be burning a little less fuel than the other engine,” said copilot Rob Odgers. Which, of course, is a good thing.
Other than that, Captain Weight said, “We don’t notice a thing. All the performance is exactly the same.”
When we land in Paris in a couple of hours, we’ll beat by two days aBoeing 747-8 freighter flying from Seattle on a 15% biofuel mix powering all four engines.
But Honeywell wins any way you slice it: the company’s Green Jet Fuel is also powering Boeing’s jumbo jet.

Transphorm Launches First Power Diode

Transphorm Launches First Power Diode



Transphorm, the startup thatemerged from stealth last month with plans for building energy-efficient power conversion modules and with $38 million in backing from investors including Kleiner Perkins and Google Ventures, has unveiled its first product: power diodes made of gallium nitride that can be embedded in power converters. The four-year-old company is at the Applied Power Electronics Conferenced (APEC) in Forth Worth, Texas, showing off the product in a power converter (DC to DC conversion) that can run at 99 percent efficiency.
Power diodes are a necessary component of all electronics, and are made of a semiconductor material — in most cases silicon — that conduct electrons in one direction. Transphorm’s power diodes are made up of the semiconductor gallium nitride, which the company says can eliminate up to 90 percent of all electric conversion losses.
Update: In a call Monday morning, Mishra explained to me that a power conversion module is made up by a diode and a transistor. In a couple of weeks Transphorm will start selling the transistor separately, and eventually will also sell the entire module (which includes both its diode and transistor).
Transphorm CEO Umesh Mishra said during the company launch last month that silicon power conversion “has reached its limit in high voltage power conversion,” and, “The time is now to do something different and to impact the 10 percent of wasted energy that occurs in power conversion.”
Transphorm didn’t invent gallium nitride as a semiconductor; other companies have been tinkering with the material for years. But at the launch event, Mishra said most companies that use gallium nitride are working on low-voltage conversion, while Transphorm is cracking high-voltage conversion.
Transphorm intends to make small devices its customers can turn into converters, power supplies, PV, motor drives, and hybrid car components. “Our biggest competitors are companies that make power conversion devices using silicon,” said Mishra.
In particular, Transphorm’s power diodes could be a good fit for power supply equipment makers that sell their wares to data centers, and the company intends to target this customer. Data centers are notorious energy hogs, and a 2010 Pike Research reportestimated that investments into energy-efficiency software and hardware for “greening” data centers will grow annually to reach $41.4 billion by 2015.
In terms of how much more the technology will cost compared to the standard on the market today, Mishra said last month that, “No new technology is cheap.”
Transphorm is also working on a project for the Department of Energy’s ARPA-E program, which hosted its second annual summit last week. ARPA-E described the company’s project as “compact motor drives and grid-tied inverters operating at high power (3-10 kW) with efficiency greater than 96 percent.” For that project, Transphorm will build gallium nitride-based power switches for inverters and converters operating at high frequency.
 
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