Search Engine Optimization did by yourself

Search Engine Optimization is one of the most important thing when start blogging or start a new website. The experts call search engine optimization SEO. SEO is crucial to acquire new audience to your blog or website. In particular the Search Engine Optimization studies how the Serch Engines, like Google, work. Knowing how search engines work can help to structure the pages or posts of your blog in a way it is easier to be found them on Google and in general on the search engines.

Macbook pro tip for Windows user

Lot of people use a Mac book pro with Window as operating system installed on. I know that now all the Mac puritan funs are thinking: you bought a Ferrari to use it as a Fiat 500! I know but some times windows is necessary. If you are one of the windows user on a mac book pro maybe you realized that there is no way to use thre right button on the optical mouse. So if you don't have a mouse at you disposal you cannot do some fundamental operations on windows.

There is a tip to solve this problem and to achieve the full windows functionality. Touch, not push, the optical mouse with two fingers instead of one and click with another finger. On the screen will appear exactly the same menu as using the mouse right button.

iPhone tips - how to kill applications on iPhone 4

iPhone 4 is an incredible multitasking smartphone. Probably the best in commerce. The multitasking allows to work at the same time on lots of applications.

Anyway, as for all the smartphones in commerce, the battery suffers the multitasking and it needs to be frequently recharged. When you close an application on the iPhone using the home button the application still runs in background even if you don't need to use it. As a result your iPhone battery gets low very fast and you should to to recharge it frequently.

There is a simple tip that will help you to save your battery and use your iphone in a more efficient way. Press twice the home button. A pop up will show the applications running in background. If you keep pressing on one of them you will be able to kill the applications running in background.

With the help of this simple tip you will save lot of battery charge and will enjoy your iPhone without the stress to recharge it so frequently!

Windows 8. The new Microsoft OS

Here it is Windows 8,the new Microsoft Operating System. Windows 8 appears to be touch-oriented but it will be also possible to use mouse.

US lunar probes set to blast off

Nasa is set to launch two spacecraft to the Moon in preparation for a return to the lunar surface by US astronauts. LRO (Lunar Reconnaissance Orbiter) and a crater observation mission will lift off from Florida on an Atlas V rocket. Data gathered by LRO will help mission planners select future landing sites and scout locations for lunar outposts. The second mission will send a rocket stage crashing into the lunar surface to scour the resulting debris plume for evidence of water ice. The Atlas rocket, carrying both payloads, is scheduled to blast off from Florida's Cape Canaveral Air Force Station at 2212 BST (1712 local time) on Thursday.
LRO will enter a low polar orbit around the Moon at an altitude of around 50km (31 miles) - the closest any spacecraft has continually orbited Earth's natural satellite.
It will map the lunar surface in unprecedented detail and is expected to enhance our understanding of the Moon's topography, mineral composition and lighting conditions.
The mission will also seek to characterise the Moon's radiation environment, helping mission planners assess the risks posed to astronauts.
The second mission, the Lunar Crater Observation and Sensing Satellite (LCROSS), aims to answer whether there is water on the Moon - either in the form of ice or hydrated minerals. It consists of two elements: a shepherding spacecraft and a Centaur upper stage rocket.

After being guided to a permanently shadowed crater at the Moon's south pole by its shepherding spacecraft, the Centaur rocket separates.
Hitting the Moon at more than 9,000 km/h (5,600 mph), the 2,200kg Centaur will kick up a huge plume of debris which could rise some 50km (30 miles) above the surface.
It is expected to loft some 250 metric tonnes of material above the lunar surface.
Four minutes after impact, the shepherding spacecraft follows a very similar path to the rocket, descending through the plume.
It will use its instruments to analyse the material, searching for water ice and vapour, hydrocarbons and hydrated materials.
The spacecraft will collect data continuously until it too slams into the lunar surface, creating a second plume.
The impacts will be watched closely by astronomers using ground-based telescopes.
Any natural reserves of water will figure prominently in planning for future manned lunar bases. It can be split into hydrogen for rocket fuel and oxygen for breathing and makes an excellent shield against radiation.
The US space agency hopes to send astronauts back to the Moon by 2020 for the first manned visit since 1972.
However, the Obama administration has ordered a sweeping independent review of Nasa's manned spaceflight strategy, which could potentially set the agency on a different course.

Source: news.bbc.co.uk

Hubble probing mysteries of deep space

Alone once again in the sky, the space telescope Hubble is flying today 350 miles above the Earth preparing to send home fresh images of the stars and galaxies studding the fabric of our early Universe. Exploding stars, black holes, the puzzling cosmic "bulge" of stars inside our own Milky Way, and a clear look at the universe itself as it was 500 million years after its violent birth in the Big Bang - these are now targets for Hubble's cameras and instruments renewed and repaired by the seven astronauts of the shuttle Atlantis during a historic and risky mission last week. For 19 years, Hubble's work has amazed millions of admirers with images sent back to Earth of brilliantly colored cosmic clouds, whirling galaxies and blazing stars at the moment of their explosive deaths. At the same time, Hubble has had a profound impact on basic astrophysics, shedding much new light on the nature of the universe, its dark matter and dark energy. The newly repaired Hubble promises to have more to offer.

"It will now be the most powerful telescope that ever existed, and it's 10 times better than it was," said Mario Livio, an astrophysicist at Hubble's scientific home, the Space Telescope Science Institute in Baltimore, in a phone interview Wednesday after the fifth and final servicing mission ended.

"In our wildest dreams we never thought that the astronauts could actually repair instruments that were broken, besides replacing the old ones with new ones," he said. "It's fantastic."

Making delicate repairs

Throughout their mission, the spacewalkers from Atlantis - weightless and floating in their bulky space suits - skillfully accomplished extraordinary repairs on Hubble's worn-out innards.

Working two at a time, spacewalkers Michael J. Massimino, Michael T. Good, John Grunsfeld and Andrew Feustel labored tirelessly through five ventures into the large and weightless cargo bay of Atlantis. Their colleagues, comfortable in the artificial gravity of the shuttle's main cabin, guided, encouraged and applauded them as they worked.

The spacewalking repairmen replaced Hubble's 16-year-old Wide Field Camera with a brand-new one; swapped out the six worn-down gyroscopes that keep the telescope pointed in the right direction; installed three new vital batteries; and repaired the telescope's Advanced Camera for Surveys - a job never designed to be accomplished in space.

High-precision tools designed for the most delicate work helped them, but occasionally brute force had to be employed. Massimino, for instance, had to work especially hard to loosen a single stripped bolt whose removal was crucial to repair the power supply of Hubble's Imaging Spectrograph. After struggling with his high-tech tools, he finally gave the bolt one sharp yank with the touch of a tough old mechanic. The bolt loosened, and Massimino was home free - to the applause of his crewmates.

That was typical of the way things went for all the spacewalks: The astronauts followed the procedures they had rehearsed for three years on the ground, but when all else failed, they resorted to their innate smarts.

When all was finished Tuesday, with Hubble and Atlantis joined in space 350 miles high over northwestern Africa, Atlantis commander Scott Altman phoned home to Mission Control in Houston

"An incredible journey," he said.

Hubble then was turned loose - alone once more, newly refurbished and ready to explore the distant skies for at least the next five years.

Since the amazing telescope was sent into space in 1990, data have been received by more than 4,000 astronomers around the world - some of them young scientists yet to make their mark, and many veteran astrophysicists who have reported major new insights into the cosmos based on Hubble's images and data.

Astronomers pick targets

Around the world, 900 astronomers have already been approved as "observers" with authority to order specific targets for the versatile telescope, according to astronomer Neill Reid of the Space Telescope Institute. Nearly 9,000 other scientists worldwide are signed up as users of Hubble's data archive, and they will be waiting to use the new data as soon as it is released, Reid said.

So Hubble's future will be busy, for the cosmos is wide and filled with mysteries.

With the Wide Field Camera, astronomers will now be able to see galaxies and exploding stars billions of years older than ever seen before and speeding faster in the expanding universe than any galaxies ever observed, Livio said.

The refurbished Hubble, he said, will also examine a mysterious region within the Milky Way that bulges with millions of stars whose composition is yet to be understood.

"Hubble will tell us how the bulge was formed," Livio said, "and we will understand the metallicity of the stars there."

(Metallicity is a term astronomers use to define the composition of all the varied chemical elements within a star other than the hydrogen and helium of which they're primarily made. The term has nothing to do with metal as we know it.)

More distant supernovae

Certain types of exploding stars called supernovae are used by astronomers as "standard candles" to measure the distance of the galaxies in which they lie. Until now Hubble could observe them as far off as 9 billion light-years away, but now the space telescope will be able to measure their distance up to 11 billion light-years off.

"This was the early universe before acceleration and gravity had the upper hand," said Livio. "So we will begin to understand more about that great mystery, the properties of dark matter."

Then there is Hubble's renewed Cosmic Origins Spectrograph.

"It will let us examine the great cosmic webs we cannot see," Livio said.

Those webs are great regions of intergalactic space that are so thin and tenuous they can never be seen from Earth. Where they are backlit by the brilliance of hugely energetic quasars, however, Hubble will be able to change that.

It will "reveal the structure of the immense filaments inside the webs we cannot see," Livio said.

Another target, he said, will be the centers of "starburst galaxies." Those are poorly understood galaxies where new stars are "born at a furious rate," as he put it, and are believed to be created when two distant galaxies collide.

"We need to understand the complex processes that create the starbursts," he said.

Studying more atmospheres

"Exoplanets" are planets orbiting distant stars far beyond our solar system. Hubble has already analyzed one exoplanet's atmosphere and found oxygen, methane, carbon dioxide, sodium and even water vapor there.

Now the repaired Space Telescope Imaging Spectrograph that Massimino repaired with a yank will soon be peering at more exoplanetary atmospheres, and will also look at those massive objects called black holes whose immense gravity sucks up everything around them with enormous bursts of energy.

Hubble's final servicing mission has been an outstanding success; its future tasks will give the world's scientists and ordinary citizens a new understanding of our Milky Way galaxy, and the universe around it.

Its successor, the far larger and more powerful James Webb Space Telescope, with its 21-foot mirror and its sunshield the size of a tennis court, is being built right now. It is scheduled for launch in 2014. The stars and galaxies, black holes and supernovae will still be there, waiting.

source: sfgate.com

An airplane flying through solar energy

An airplane flying through solar energy. It seems incredible but it's all true!
Making the tour of the world with an airplane flying through solar energy.This is the new challenge set by the Swiss Bertrand Piccard who, after having flown in 1999 around the world non-stop, with the Breitling Orbiter balloon, along with British Brian Jones, now wants to repeat the company on board of an airplane energy powered only by solar energy.
The event 'was announced in Lausanne by the Bertrand Piccard, which in 46 years, want to stand out again the flight: the technological challenge will be' attempted in 2007 with the first flight at night and in 2009 with the entire trip around the world , as revealed on the same explorer in a press conference at the Polytechnic of Lausanne (EPFL). I am the expert of the Swiss Polytechnic which will assist in the company, realizing the revolutionary aircraft.
The objective 'to design a vehicle without fossil fuel emissions and pollutants that can remain in flight at night thanks to solar energy.
"The company said Piccard--also has a message: to demonstrate the crucial role that can 'carry out cutting-edge technology in promoting sustainable development and renewable energy feasibility study rinnovabili.Lo' and 'newly concluso.Il design of 'require air' still at least a 'year of work, then passera' phase of the first prototype and costruzione.Il 'in 2006 and the first flight test in June of that year.
The plane will have 'the silhouette of a giant glider with 150 square feet of wing surface, and this in order to capture and store all the energy possible during the 9-10 day and can remain in the air even at night. "
"If the company andra 'in port there will be closer to flight ever," concluded Piccard profession is that of the psychiatrist.
The EPFL plans to develop multifunctional materials and particularly leggeri.E' also provides for the development of an automatic pilot "smart", able to anticipate situations and to rouse the pilot if necessary. "

Renewables most useful of nuclear

"Nuclear? There is no prejudice in technology, but - as is planned - I feel more a mirror for birds. For at least three good reasons, if not removed, everything would be read as improvisation "said Giacomo Berni, national secretary of Filcem - the Federation of Workers of chemistry, energy and manufacturing of Cgil - at the opening of the congress' Energy constraints, choices, opportunities", held today in Rome at Palazzo Marini. The first. The claims that more than 20 years ago 'we brought to referendum (catastrophic risk, waste storage) are today - said Berni - still valid': Italy then instead maintain - as is required by law - a 'garrison Research has abandoned this technology and, if we exclude the activities of disposal sites conducted by Sogin (of which are being asked inexplicably - adds Berni - the dismemberment and the Commissioner), did not produce absolutely nothing.
The second. Through a lot of ease, in the "energy package" contained in the draft law 'development' linked to the financial maneuver "is expected - continued the Secretary - the creation of an Agency for Nuclear Safety too centralist, with powers as binding to represent a force against the involvement of local authorities, contradicting the need for neutrality and transparency of their authority should be required to provide guarantees to citizens on an issue which - needless to say - raises concern. "
The third. As to the thorny problem of costs, balances in hand, a third generation plant from 1600 Mw would cost 5 billion euros per section, including the cost of "decommissioning" which can no longer be called into account the state. The same length of the stage feasible of equipment (estimated at 8 years plus 2 procedures) determines - supports the Filcem-Cgil - uncertainty on the timing of return of bank finance, as well as the protracted time depreciation of equipment (at least 20 years) over time diluting any benefits for consumers.
The Filcem-Cgil instead launches a proposal: 'Why - Berni claims - do not concentrate in the short to medium term in the realization of photovoltaic and wind power plants that would benefit the country in the European targets, reducing the price of oil? " . The figures speak for the photovoltaic there are already 137 requests for parks, with a peak power for 2740 Mw; for wind power, for 1023 parks for a total power of 61,380 MW.
'And' realistic course - Berni suggests, borrowing an estimate made by a group of experts from the associations of consumers and producers of conventional - the creation within 3-5 years of 1.200-1.800 Mw photovoltaic and wind power 15.000-20.000 Mw (third the installed capacity).
These proposals useful for the country to break its dependence on "all oil" and "all gas", to achieve the objectives of Europe'20, 20, 20 'and the urgent need for a strategy of diversification of energy sources. "We have title to advance - continued Berni - precisely because we have strong support to the process of opening the energy market - still unfinished - and supported choices in support of" clean coal ", the gasification and the thermo ', so we facilitate reducing the cost of importing raw materials from which the country is known, does not have the energy bill is still very high: 46.6 billion euros a year (3% of GDP) with 57 % Of spending to buy oil!
"But today - questions the union leader - in the light of the financial tsunami, how can mitigate rising energy costs and impact on business and income of workers?". Two - the second-Cgil Filcem - the recipes are possible: 1) increasing efficiency and saving energy, both, are an essential instrument of government demand and stimulating investment in sectors such as solar, wind, the termoelettromeccanica, the chemical, construction, transport, and 2) to assess the possibility of cutting the tax on petroleum products, now well above 40% of their final cost. The objective of significant reduction of excise duty on fuel - concluded Berni - would be more effective suppression and healthy part of the purchasing power of wages for workers.