Showing posts with label Satellite. Show all posts
Showing posts with label Satellite. Show all posts

Friday, March 22, 2013

Planck satellite creates most detailed map ever of cosmic microwave background radiation

Planck reveals an almost perfect universe

21 March 2013 Acquired by ESA's Planck space telescope, the most detailed map ever created of the cosmic microwave background – the relic radiation from the Big Bang – was released today revealing the existence of features that challenge the foundations of our current understanding of the Universe.

The image is based on the initial 15.5 months of data from Planck and is the mission's first all-sky picture of the oldest light in our Universe, imprinted on the sky when it was just 380 000 years old.

At that time, the young Universe was filled with a hot dense soup of interacting protons, electrons and photons at about 2700ºC. When the protons and electrons joined to form hydrogen atoms, the light was set free. As the Universe has expanded, this light today has been stretched out to microwave wavelengths, equivalent to a temperature of just 2.7 degrees above absolute zero.

This 'cosmic microwave background' – CMB – shows tiny temperature fluctuations that correspond to regions of slightly different densities at very early times, representing the seeds of all future structure: the stars and galaxies of today.

According to the standard model of cosmology, the fluctuations arose immediately after the Big Bang and were stretched to cosmologically large scales during a brief period of accelerated expansion known as inflation.

Planck was designed to map these fluctuations across the whole sky with greater resolution and sensitivity than ever before. By analysing the nature and distribution of the seeds in Planck's CMB image, we can determine the composition and evolution of the Universe from its birth to the present day.


Planck's anomalous sky
Overall, the information extracted from Planck's new map provides an excellent confirmation of the standard model of cosmology at an unprecedented accuracy, setting a new benchmark in our manifest of the contents of the Universe.

But because precision of Planck's map is so high, it also made it possible to reveal some peculiar unexplained features that may well require new physics to be understood.

"The extraordinary quality of Planck's portrait of the infant Universe allows us to peel back its layers to the very foundations, revealing that our blueprint of the cosmos is far from complete. Such discoveries were made possible by the unique technologies developed for that purpose by European industry," says Jean-Jacques Dordain, ESA's Director General.

"Since the release of Planck's first all-sky image in 2010, we have been carefully extracting and analysing all of the foreground emissions that lie between us and the Universe's first light, revealing the cosmic microwave background in the greatest detail yet," adds George Efstathiou of the University of Cambridge, UK.

One of the most surprising findings is that the fluctuations in the CMB temperatures at large angular scales do not match those predicted by the standard model – their signals are not as strong as expected from the smaller scale structure revealed by Planck.

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Asymmetry and cold spot
Another is an asymmetry in the average temperatures on opposite hemispheres of the sky. This runs counter to the prediction made by the standard model that the Universe should be broadly similar in any direction we look.

Furthermore, a cold spot extends over a patch of sky that is much larger than expected.

The asymmetry and the cold spot had already been hinted at with Planck's predecessor, NASA's WMAP mission, but were largely ignored because of lingering doubts about their cosmic origin.

"The fact that Planck has made such a significant detection of these anomalies erases any doubts about their reality; it can no longer be said that they are artefacts of the measurements. They are real and we have to look for a credible explanation," says Paolo Natoli of the University of Ferrara, Italy.

"Imagine investigating the foundations of a house and finding that parts of them are weak. You might not know whether the weaknesses will eventually topple the house, but you'd probably start looking for ways to reinforce it pretty quickly all the same," adds François Bouchet of the Institut d'Astrophysique de Paris.

One way to explain the anomalies is to propose that the Universe is in fact not the same in all directions on a larger scale than we can observe. In this scenario, the light rays from the CMB may have taken a more complicated route through the Universe than previously understood, resulting in some of the unusual patterns observed today.

"Our ultimate goal would be to construct a new model that predicts the anomalies and links them together. But these are early days; so far, we don't know whether this is possible and what type of new physics might be needed. And that's exciting," says Professor Efstathiou.

New cosmic recipe

New cosmic recipe
Beyond the anomalies, however, the Planck data conform spectacularly well to the expectations of a rather simple model of the Universe, allowing scientists to extract the most refined values yet for its ingredients.

Normal matter that makes up stars and galaxies contributes just 4.9% of the mass/energy density of the Universe. Dark matter, which has thus far only been detected indirectly by its gravitational influence, makes up 26.8%, nearly a fifth more than the previous estimate.

Conversely, dark energy, a mysterious force thought to be responsible for accelerating the expansion of the Universe, accounts for less than previously thought.

Finally, the Planck data also set a new value for the rate at which the Universe is expanding today, known as the Hubble constant. At 67.15 kilometres per second per megaparsec, this is significantly less than the current standard value in astronomy. The data imply that the age of the Universe is 13.82 billion years.

"With the most accurate and detailed maps of the microwave sky ever made, Planck is painting a new picture of the Universe that is pushing us to the limits of understanding current cosmological theories," says Jan Tauber, ESA's Planck Project Scientist.

"We see an almost perfect fit to the standard model of cosmology, but with intriguing features that force us to rethink some of our basic assumptions.

"This is the beginning of a new journey and we expect that our continued analysis of Planck data will help shed light on this conundrum."


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Saturday, March 2, 2013

Lockheed Martin powers up its first GPS III satellite, stays on track for 2014

Lockheed Martin powers up its first GPS III satellite, brings accurate positioning that much closer


It's been awhile since we heard much about Lockheed Martin's GPS III satellite family beyond mention of an early prototype. The next-gen positioning system just took a big step forward with word that the company has successfully powered up the first production craft of the bunch, Space Vehicle One. Flicking the switch clears it for testing and keeps the GPS III program's 2014 launch window within view. More importantly, the activation takes us one step closer to improved GPS accuracy for civilians and soldiers alike.


Via: Phys.org


Source: Lockheed Martin

Friday, February 1, 2013

NASA launches TDRS-K satellite to 'replenish aging space network'

NASA launches TDRSK satellite to 'replenish aging space network'


There's nothing worse than an old space network, but thankfully NASA's working on getting some new technology into orbit. The organization just launched the first of three new satellites on the back of a United Launch Alliance Atlas V rocket, the first step in the "replenishment of our aging space network," according to project manager Jeffrey Gramling. The TDRS-K offers up tracking, telemetry and more, in order to improve communications for space exploration. The satellite is entering a three-month test period, before NASA actually puts it into action. Next year, it will be joined by the TDRS-L, followed by the TDRS-M, which is set to be fully built by 2015.

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Thursday, January 31, 2013

South Korea successfully launches native rocket and satellite into space

\South Korea launches first native rocket and satellite into space


The spacefaring club has been a small one: to date, just 10 countries have managed to build their own rocket and successfully deploy at least a satellite. Make that 11. South Korea has entered the fold by successfully launching its mostly self-developed, two-stage Naro rocket and putting the vehicle's Science and Technology Satellite-2C payload into orbit. The achievement comes after two prominent failures in 2009 and 2010, and is partly symbolic when there's no plans for a short-term follow-up. However, the success gets the ball rolling for the long run -- the Korea Aerospace Research Institute is working with contractors to build completely in-house rocket stages by 2016, and reach 300 tons of thrust as soon as 2018.

when.eng("eng.perm.init")

Wednesday, December 26, 2012

These Astounding Satellite Images Were the Best Bird's-Eye-Views of 2012

This story will display in ...Dec 25, 2012 3:00 PM  

These Astounding Satellite Images Were the Best Bird's-Eye-Views of 2012 Our daily does of satellite imagery through services like Google Maps have made looking down at Earth seem rather hum-drum at times. But there are still magical and majestic sites to be hold, as seen in this selection from 2012.

DigitalGlobe recently announced their Best of 2012 picks out of their vast archive of images. Phenomena both natural and man-made make appearances, and are equally striking. We happen to love the one of Mt. Fuji gushing steam.


These Astounding Satellite Images Were the Best Bird's-Eye-Views of 2012


These Astounding Satellite Images Were the Best Bird's-Eye-Views of 2012


These Astounding Satellite Images Were the Best Bird's-Eye-Views of 2012


These Astounding Satellite Images Were the Best Bird's-Eye-Views of 2012


These Astounding Satellite Images Were the Best Bird's-Eye-Views of 2012

A winner must be chosen, and if you venture over to DigitalGlobe's Facebook page, you can vote on your favorite with a Like! [DigitalGlobe via TwistedSifter]


View the original article here

Sunday, December 23, 2012

Review: Toshiba Satellite U920T

Long batteryNice laptop designDecent connectivityTrackpadChunkyHeavyDull screenLack of refinement

The hybrid laptop-tablet form factor has well and truly kicked off, and you'd be hard pressed to walk into your local electronics superstore and find a bog-standard laptop between the rows of flipping, sliding, swivelling, touchscreen, Windows 8 hybrids.

The Toshiba Satellite U920t is the Japanese company's interpretation of a single device that crosses the laptop and tablet divide.This convertible Ultrabook starts as a flat 12.5-inch tablet before the screen slides back and lifts up to transform it into a traditional laptop.

There's been no stand-out design or winning form factor in the hybrid's race to public acceptance, so manufacturers are still producing wildly different designs. Other such touchscreen Windows PCs are the Sony Vaio Duo 11, Dell XPS 12, Asus Taichi and Asus Vivobook S200, to name but a few.

Toshiba Satellite U920t review

At £899/AU$1,699/US$1,149, the Toshiba is well priced for a hybrid Ultrabook, undercutting the Dell XPS 12 and Sony Vaio Duo 11 significantly.

It's designed for anyone who wants the portability of a tablet and access to a range of apps. Windows 8 comes with its own marketplace for apps, which is filling up fast. There are over 20,000 available, with new titles being added all the time.

However, unlike Android tablets and iPads, hybrids such as the Toshiba Satellite U920t operate like a normal PC. This means you can run full apps such as Photoshop or Microsoft Office.

Toshiba Satellite U920t review

This offers a genuine option for people who don't want to carry two devices, and puts the hybrid form factor in a race for supremacy against the software ecosystems of ARM-based competition.

The Satellite U920t's 12.5-inch screen sits back flat when closed. It feels weighty, at 1.5kg (3.3lbs), but it's comparable to the likes of the Dell XPS 12. Frankly, it's too heavy to be used comfortably in the same way you'd use an iPad or Android tablet, and this will colour people's opinions immediately.

However, being a dubious tablet is somewhat remedied by its excellent transition to laptop mode. Slide the screen back and it looks like most other laptops - and you get all the benefits, too.

Toshiba Satellite U920t review

The full QWERTY keyboard is larger than the Sony Vaio Duo 11, and conveniently there's a full trackpad with two click buttons, which is extremely useful when the touchscreen won't suffice.

It's unrealistic to judge the Toshiba Satellite against Ultrabooks and the iPad, and you'll read many reviews which do just that. However, the question is whether the Toshiba Satellite U920t can be more portable, usable and convenient than its competitors and can it persuade anyone to leave their iPad at home.

Tuesday, December 18, 2012

Softbank will offer satellite phones for use during natural disasters

DNP Softbank will offer satellite phones for use during natural disasters

Japanese mobile service provider Softbank announced today that it will sell satellite phones that can be used during tsunamis, earthquakes, or other events during which traditional mobile phone service may be unavailable. The carrier has partnered with Dubai-based Thuraya, a satellite phone and service provider, to sell satellite-based phones to its home market. Softbank, which is in the midst of a $20.1 billion acquisition of US carrier Sprint, has been slower than other Japanese carriers to restore critical mobile services after natural disaster-caused outages. Satellite phone sales will primarily target essential services such as government officials, energy providers, and local media, though private citizens will be able to buy the phones through retail outlets in order to stay connected during critical events. No word yet on price, though Japanese consumers can expect these phones on the market by February.

Continue reading Softbank will offer satellite phones for use during natural disasters

Filed under: Cellphones, Mobile

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Via: Computerworld

Source: Zawya

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Wednesday, December 12, 2012

North Korea Says It Just Put a Satellite in Space (Updated)

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North Korea Says It Just Put a Satellite in Space (Updated)North Korea just tested another one of their ICBMs made out of twigs and rubber bands into the air, where it quickly disintegrated and fell into the Pacific Ocean. Again. Update: Maybe it worked this time?

The Japanese government, which doesn't appreciate rockets being flung around willy nilly, is pissed—despite the fact that North Korea typicall has no idea what the hell it's doing. They say the test launch—which North Korea says was meant for peaceful, satellite-deploying purposes—passed directly over Okinawa, but no attempt to shoot it down was made.

This will increase tensions in an already tense area, lead to international condemnations, stall the peace process that could someday unite North and South Korea, and take more money out of the mouths of starving North Koreans and into a rusty log flume with which Kim Jong-un wants to spook the globe. [Al Jazeera]

(Photo above from previous failed attempt at scaring world)

Update: Contrary to earlier reports of debris in the sea, there's now word floating around that the launch might have been a success—meaning the rocket didn't fall apart, and North Korea possibly put a satellite into space.

Update 2: ABC News says the missile flew along its "expected trajectory," according to anonymous US officials.

Update 3: North Korea says it successfully put its "Bright Star-3" weather satellite into space. Emphasis placed firmly on the "North Korea says" portion—there's no independent confirmation of any of this, yet. Until someone other than a state-run mouthpiece says the launch was a success, this rocket (and its satellite) could still be sitting at the bottom of the ocean.

Update 4:US intel official told CNN that North Korea's rocket "appears to have completed all phases." It's still early in its analysis but that's the official word at the moment.


View the original article here

Saturday, November 10, 2012

Toshiba Satellite U925t review: with its first Windows 8 convertible, Toshiba bets big on the slider

Toshiba Satellite U925t review

You can't see our New York City office right now, but it's something of a laptop menagerie. We just finished reviewing a laptop whose screen flips inside its hinge, and now we're testing an Ultrabook with a touchscreen, along with a notebook whose screen folds all the way back. The Toshiba Satellite U925t ($1,150) is yet another breed of Windows 8 hardware. It's a slider, to be exact, which is to say its 12.5-inch screen slides out and up to reveal a full-sized keyboard. It's nice, in theory, because you can use it as a tablet without having to worry about packing a separate keyboard. But unlike the Dell XPS 12 or Lenovo IdeaPad Yoga 13, which can also be used in tablet mode, the screen here is always exposed. As you can imagine, too, that propped-up display has a very real effect on the typing experience. Given all that, is there any reason to consider this over other, similarly priced Windows 8 convertibles? Could there perhaps be any performance benefits, or advantages in screen quality? Meet us after the break where we'll hash it out.

DNP Toshiba Satellite U925t review with its first Win 8 convertible, Toshiba bets big on the slider

It's as if Toshiba gave up midway through the design process.

Back in June, if you recall, Toshiba announced an Ultrabook called the Satellite U845W. You might remember it as that funky-looking notebook with a 14.4-inch, 21:9 display, but we think of it a bit differently. To us, it's simply the prettiest, most understated PC Toshiba has put out in a long, long time. It was the mix of materials that sealed the deal: a machined aluminum lid, soft-touch accents, a backlit keyboard and even a metal FCC plate. It was tactile, inviting and, most importantly, subtle.

The U925t isn't an exact copy (it doesn't even have a lid) but it does borrow some key design elements. This, too, has a textured, rubbery finish both on the underside and on the palm rest. As on the U845W, Toshiba went with an inoffensive shade of dark brown. These are also the same flat, chiclet-style keys, just shrunken down to fit a smaller deck. That said, this seems to be a clear step down in build quality. The whole thing is made of plastic, and while the soft-touch materials do a good job masking that, you can still feel it in the keyboard panel, which exhibits some noticeable flex. Also, Toshiba didn't give much thought to how the back of the device looks once you slide out the display and prop it up. That backside has a bare, almost unfinished look -- it's as if Toshiba gave up midway through the design process. On another machine it might pass for industrial; here, it just doesn't match the rest of the design.

As for that display, it's coated in scratch-resistant Gorilla Glass, which is a fortunate thing since the screen is constantly exposed (unless you buy a sleeve for it, of course). We didn't really consider this when we first got hands-on: at the time, we were more concerned with how sturdy the sliding mechanism was (pretty sturdy) or how comfortable the typing experience would be (just okay). It's once you find yourself in possession of an $1,150 machine that you start to feel a bit nervous about sticking it in a bag with other items. As we've found on phones, tablets and other devices, though, the Gorilla Glass does a good job of keeping the screen pristine. So after spending a little time with it, we were able to relax and trust the panel wouldn't get ruined.

One nice thing about this form factor is that you can set it in your lap with the display propped-up and not have to worry about the whole thing toppling backward. The hinge on the backside anchors the display in such a way that you needn't worry about the weight distribution, as you might with a dockable tablet. Of course, too, that slider form factor means you can use the U925t as a tablet when you want to. As we said with the XPS 12, though, you wouldn't want to use a 3.35-pound, 12-inch tablet for long periods of time. Your arms would get tired. If you're hanging out on the couch, however, and can rest the PC against your legs, it makes for a nice lean-back sort of device.

At 3.35 pounds, the U925t is naturally a bit heavier than 12-inch machines that don't have a touchscreen, but it's the exact same weight as the XPS 12, which can also be used as a tablet. Size-wise, the chassis measures 0.78 inch thick, which is just wide enough to accommodate an HDMI socket and two USB 3.0 ports, one of which supports Toshiba's Sleep and Charge technology. Poke around further and you'll find a volume rocker, a key for enabling screen auto-rotation, the power button, a volume rocker and two vents around back. There's even an SD card reader, something you won't find on the Dell XPS 12 Windows 8 convertible. Finally, being a PC you can use as a tablet, this has not one, but two cameras: an HD webcam up front, and a 3-megapixel, autofocusing shooter on the back. On the inside, it supports Intel Wireless Display, like so many Ultrabooks, but it also packs an NFC radio, which is still something of a novelty on laptops.

Toshiba Satellite U925t review

We're grading on a curve here. When we first got hands-on with the U925t, we said it had a roomier keyboard than most sliders we've seen. And that's true; an inherent problem with this form factor is that when the display is propped up, the hinge 'round back eats into the usable deck space, leaving the keyboard area unusually cramped. We still say the U925t has a better keyboard than the new MSI Slider S20, but that isn't saying much. The layout here still feels crowded compared to the XPS 12, or any other ultraportable with a fully usable keyboard deck.

All told, we were able to type the brunt of this review on it, but we did make plenty of typos along the way. It's a shame the propped-up display takes up so much space, because with a little more room this would have been a great typing experience. Though the keys are a bit shallow, they have a soft finish that feels nice under the fingertips, and we like how the keyboard makes relatively little sound, even when you're typing furiously. The gentle backlighting, too, is a nice touch. (You can turn it off at any time by pressing Fn-Z.)

If you thought the keyboard was crowded, imagine how squat the touchpad is. To its credit, it's wide; it's just not very tall. That's mainly an issue when you're trying to click the built-in touch button (which you might resort to if you're in File Explorer or some other desktop app where precision is needed). In that scenario, it's tough to fit both your thumb and index finger on the trackpad at the same time; your index finger might well brush up against the top of the touchpad, and hit the spacebar.

Fortunately, the touchpad is big enough so that you can comfortably do two-finger scrolling, which works smoothly on this device. You probably won't need the touchpad for pinch-to-zoom because, you know, you can just reach up and use the touchscreen for that.

Toshiba Satellite U925t review

In addition to Gorilla Glass protection, the 12.5-inch display offers some good viewing angles, thanks to in-plane switching (IPS) technology. Given that this isn't the sort of machine you're likely to crowd around with friends, you might appreciate the viewing angles most when using the PC in your lap. Using it that way, we had plenty of leeway when adjusting the screen. As for the 1,366 x 768 resolution, that's quite standard among Windows machines, especially models with small screens. It's perfectly adequate for watching movies and getting work done, but it's worth noting that there's a growing number of 1080p offerings out there, including the Dell XPS 12 and the Acer Aspire S7, a 13-inch Ultrabook with a touchscreen. Indeed, we happen to have both of these other machines lying around, and as you'd expect, their screens look crisper, and the difference is noticeable in both the desktop and in Microsoft's Modern UI.

The U925t's two speakers are located on the bottom side of the device, just underneath the palm rest. As you might expect, given the size of the laptop and also the location of the speakers, the sound never gets very loud, even at max settings. Like so many other laptops, too, the sound is decidedly tinny, with clipped bass notes. Those low tones sound especially distorted at top volume, so you might want to keep the volume at a more moderate setting, even if it means making do with a more subdued audio experience.



PCMark73DMark063DMark11ATTO (top disk speeds)Toshiba Satellite U925t (1.7GHz Core i5-3317U, Intel HD 4000)521 MB/s (reads); 265 MB/s (writes)Dell XPS 12 (1.7GHz Core i5-3317U, Intel HD 4000)516 MB/s (reads); 263 MB/s (writes)Lenovo IdeaPad Yoga 13 (1.7GHz Core i5-3317U, Intel HD 4000)278 MB/s (reads); 263 MB/s (writes)Acer Aspire S7 (2.4GHz Core i7-3517U, Intel HD 4000)934 MB/s (reads); 686 MB/s (writes)

This might be the most straightforward performance comparisons we've ever published. Each of the Ultrabooks listed in that table up there runs Windows 8, and three of them have the same Ivy Bridge Core i5 processor. All have Intel's latest integrated graphics solution, the HD 4000 chipset. Appropriately, then, benchmark scores in PCMark 7, 3DMark06 and 3DMark11 are all on par with one another. The one exception is the Acer Aspire S7, which we tested with a Core i7 CPU and RAID 0 SSD setup. So, there aren't many indications that the U925t is either faster or slower than its competitors. Its max disk speeds, as measured by ATTO, were very close to what we got with the XPS 12. Its read speeds are considerably faster than the Yoga 13's (521 MB/s versus 278 MB/s), but that seems to say more about the Yoga, since the XPS 12 also notched read speeds in the 500 MB/s range.

In real-world use, the U925t boots up quickly: eight seconds to the log-in screen, and then another two seconds to load the Start screen. That's even faster than the XPS 12, which took 12 seconds to boot. We did notice that certain Windows 8 apps such as the Windows Store were slow to load, but we didn't notice any lag as we toggled through open apps and browser tabs. If anything, the biggest red flag was fan noise: the machine gets awfully loud, particularly while running games. At one point, the sound coming from the fans was so loud that we worried we were annoying other people in the office. That's a subjective measure, of course. So here's a more practical question: will that fan noise annoy you while you're trying to concentrate?

Samsung Series 9 (15-inch, 2012)Samsung Series 9 (13-inch, 2012)Samsung Series 5 Ultrabook (14-inch, 2012)Samsung Series 9 (13-inch, 2011)

When it comes to testing battery life on Windos 8 laptops, we're in the middle of a disappointing streak: the U925t lasted little more than five hours in our standard rundown test, which involves looping video with WiFi on and the brightness fixed at 65 percent. As taxing as that test is, we've seen some non-touch-enabled Ivy Bridge Ultrabooks last upwards of six hours, if not seven. And yet, the best showing we've seen so far from a touchscreen Windows 8 Ultrabook is the Lenovo Yoga Ideapad 13, which lasted five hours and 32 minutes in the same test. (Full review coming soon, promise!) Likewise, the Dell XPS 12 lasted five hours and 30 minutes. By those standards, the U925t's battery life isn't surprising, per se, but it still isn't great.


Compared to some other PC makers, Toshiba included quite a bit of bloatware, including: Netflix, eBay, Amazon, Vimeo, Encyclopedia Brittanica, the Merriam-Webster dictionary, iHeartRadio, iCookbook, Origin (EA's game store) and a 30-day trial of Norton Internet Security 2013. Toshiba also threw in some items of its own, including Book Place, News Place and a support guide. Fortunately, at least, crapware in Windows 8 takes the form of an extra cluster of Live Tiles on the Start Menu; none of this will litter the desktop. Annoyingly, some of these programs come pinned to the Taskbar, but you can of course un-pin them if you so choose.

Like most consumer laptops, the U925t comes with a one-year parts-and-labor warranty. The battery also has one year of coverage.


Toshiba Satellite U925t review
With so many other Windows 8 convertibles available or arriving soon, we suspect your money would be better spent elsewhere.

The U925t is sold in one configuration on Toshiba's site: the same $1,150 model we tested with the Core i5-3317U processor, 128GB SSD and 4GB of RAM. Those are fairly typical specs, as far as Ultrabooks go, though some power users might lament that they can't configure it with a Core i7 CPU, 8GB of RAM or 256 gigs of storage.

We've already mentioned the U925t's most similar competitors: the Dell XPS 12 and the Lenovo IdeaPad Yoga 13. Why do we choose these? Well, we were looking for Ultrabooks that could be used as tablets -- specifically, Ultrabooks with 12- or 13-inch screens. Anything bigger would mean making some serious compromises in mobility. For the purposes of keeping things brief, we also won't dwell on regular old touchscreen notebooks, because you can't really use those as tablets, even if you are tapping the display with your finger. So, that leaves us with a fairly small group of machines, with the XPS 12 and Yoga 13 being the most prominent.

If you can get past the XPS 12's odd form factor (that's the one whose screen flips inside the hinge) it's actually a solid little touchscreen Ultrabook. At $1,200 and up, it costs about the same as the U925t, and comes with nearly the same specs, including 4GB of RAM, a 128GB SSD and that Core i5-3317U processor. The big difference is the display: the XPS 12 comes standard with a 1080p IPS panel and yes, it is as lovely as it sounds. The XPS 12 offers nearly identical battery life to the U925t and weighs the same. It can also be configured with 8GB of RAM and a 256GB SSD. Its design and build quality are excellent too, but there is one catch: it's missing an SD reader.

As for the Yoga 13, we need to tell you up front that we're still testing it, and aren't ready to weigh in decisively. That said, we're enjoying its comfortable keyboard and solid build quality. As you can see in the above performance tables, its battery life is slightly better than the U925t's, and on par with the XPS 12's. The performance across these three machines seems to be comparable. As for specs, it currently starts at $1,000 with a Core i3 processor, 4GB of RAM, a 128GB SSD and a 1,600 x 900 display. To get the same Core i5 CPU offered in the U925t and XPS 12 you'd have to pay $1,100, which is still slightly less expensive than the Toshiba model.


Toshiba Satellite U925t review

If Toshiba got one thing right with its first Windows 8 flagship, it's this: there is indeed a market for PCs that can be used as tablets. It's convenient to tuck your Ultrabook's keyboard away when the moment strikes, and turn it into a slate (a big, heavy slate, but a slate nonetheless). That's a nice option to have when you're hanging out on the couch, half-watching TV: you might want to glance at your email or look up actors on IMDB, but you probably aren't going to make much use of the keyboard. Not when you're acting like a couch potato, anyway.

The more we use the Satellite U925t, though, the more we're convinced Toshiba took a gamble on the wrong form factor. That propped-up display eats into the available deck space, making for a compromised typing experience. The trackpad, too, is unnecessarily small, which might bother folks who are trying to get work done on the desktop and can't really get by on finger input. Meanwhile, the Dell XPS 12 and Lenovo IdeaPad Yoga 13 cost about the same and weigh about the same, except they approach that tablet transformation in such a way that you never lose out on keyboard space.

There are other issues with the U925t, too. Battery life is shorter than on those two competing models we mentioned, and the build quality isn't as robust. What's more, the XPS 12 comes standard with a 1080p screen, while the Yoga 13 has a 1,600 x 900 panel. The display would have been one of the few saving graces for the U925t, but it has lower resolution (1,366 x 768). And while the viewing angles are good, they're no better than what other machines are offering. That's not to say the U925t has no redeeming qualities in its own right, but with so many other Windows 8 convertibles available or arriving soon, we suspect your money would be better spent elsewhere.


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