2011年3月24日星期四

Microsoft Reviews - First look at Microsoft Internet Explorer 9

It's no secret Microsoft's browser lost ground as savvy Internet users ditched Internet Explorer for the faster, more modern Google Chrome and Mozilla Firefox. But Microsoft has a real competitor once again with IE9, released at midnight Monday night on Windows 7 and Vista after several months of beta testing.
The focus is on speed, privacy and simplicity, with a stripped-down interface, tracking protection, pinned sites, jump lists and enhanced support for HTML5.

InPrivate browsing

While tracking protection prevents website operators from collecting information about you, InPrivate browsing prevents Internet Explorer itself from storing data about your web surfing habits, including browsing history, temporary Internet files, usernames, passwords and cookies. "InPrivate Browsing prevents Internet Explorer from storing data about your browsing session," Microsoft says. "This helps prevent anyone else who might be using your computer from seeing where you visited and what you looked at on the web." InPrivate browsing has been around since IE8 but remains a key privacy tool for users in IE9.

Improved interface

Taking a page from Google Chrome, Microsoft has ripped the clutter out of IE9's interface, leaving more room for browsing. To add space for web pages, Microsoft put the URL/search bar and the tabs in the same row. But users who prefer extra room for tabs can switch to a more Chrome-like interface in which the tabs and URL occupy separate levels. To make that change, or to add a menu bar and favorites bar, simply right click near the URL bar to bring up a menu.

Microsoft brags about HTML5...

Like all major browser vendors, Microsoft is boasting support for HTML5 video and other media, even though the HTML5 specification is still several years from final approval. Microsoft claims hardware acceleration puts it ahead of the competition, and has set up numerous demos, including this Bejeweled-like tile switch game, to show off IE9's HTML5 chops.

but falls short on HTML5 test

IE9 scored 135 out of 400 on a test to determine support for the HTML5 standard. On my Windows 7 computer, Firefox scored 159 and Chrome led the way with 301. Caveat: The test seems to indicate what percentage of HTML5 features each browser supports, but not the functionality of each supported feature. The test does not cover all HTML5 features, either.

JavaScript benchmarks

IE9 scored 477 on this JavaScript benchmark, well short of the 811 score posted by Chrome 10. The stable version of Firefox scored only 166. IE9 did better on the SunSpider JavaScript benchmark by WebKit, scoring a little better than Chrome and heads and shoulders above Firefox.

Privacy: Do not track

IE9's tracking protection is like a "do-not-call" list, letting users control whether third party site content can track them online. "Many webpages include content from other websites," Microsoft says. "When content is loaded from a third party site, standard information, including your IP address and the address of the webpage you're viewing is sent to each of the third parties that have content in the page you're viewing." This is an opt-in service letting users subscribe to tracking protection lists.

Developers developers developers!

As always, Microsoft is all about developers. If you're a web developer looking to build sites for IE9, make sure to check out Microsoft's Internet Explorer 9 Guide for Developers.

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How to prevent laptop battery weared down

What causes a battery to wear down — is it mechanical or chemical? The answer is “both”. A battery is a perishable product that starts deteriorating right from the time it leaves the factory. Similar to a spring under tension, a Toshiba pa3465u-1brs Battery seeks to revert back to its lowest denominator. The speed of aging is subject to depth of discharge, environmental conditions, charge methods and maintenance procedures, or the lack thereof. Aging and user-conditions affect each Asus a32-f3 battery chemistry differently.
Today’s HP laptop battery research focuses heavily on lithium systems, so much so that one could assume that all future applications will be lithium based. This lithium hype is especially apparent when attending battery conferences where battery manufacturers from all corners of the world meet to present their latest achievements. Just a few years ago, the argument was NiCd against NiMH; then the speakers argued on the benefit of Li-ion over NiMH and today the emphasis is on Li-ion Polymer. The Nickel Cadmium (NiCd) and Nickel Metal Hydride (NiMH) are hardly mentioned.
With the move from analog to digital devices, new demands are being placed on theDell studio 1737 battery. Unlike analog equipment that draws a predictable and steady current, digital devices load the battery with short, high current bursts.
One of the urgent requirements of a battery for digital applications is low internal resistance. Measured in milliohms (mW), the internal resistance is the gatekeeper that, to a large extent, determines the runtime. The lower the resistance, the less restriction the battery encounters in delivering the needed power bursts. A high mW reading can trigger an early ‘low battery’ indication on a seemingly good Dell latitude e6400 battery because the available energy cannot be fully delivered.
toshiba pa3399u-2brs laptop battery
When Nickel Metal Hydride (NiMH) was first introduced there was much publicity about its memory-free status. Today, it is known that this chemistry also suffers from memory but to a lesser extent than the NiCd. The positive nickel plate, a metal that is shared by both chemistries, is responsible for the crystalline formation.
Try To avoid over-charging, especially, do not let your laptop battery over discharged. It is normal for laptop battery to become warm when it's charged and used. The battery exhaust much faster under the high temperature, you should avoid using your laptop battery in shady and cool place. Hit the battery, and other acts will also accelerate depletion of battery. So, pay attention to your battery as much as possible.
If you don't use your Laptop batteries for 1 month or longer, you should remove the battery from your notebook, make sure leave your battery power about 40%, stored it in a shade, cool, and dry place away from heat, metal objects and direct sunlight, but not in the refrigerator. It's objected strongly store your laptop battery for over three months without any using. A charged laptop battery will eventually lose its charge if unused. It may therefore be necessary to recharge the battery after a storage period.
In addition to the crystal-forming activity on the positive plate, the NiCd also develops crystals on the negative cadmium plate. Because both plates are affected by crystalline formation, the NiCd requires more frequent discharge cycles than the NiMH. This is a non-scientific explanation of why the NiCd is more prone to memory than the NiMH.
The stages of crystalline formation of a Toshiba Pa3285u-3brs Battery are illustrated in Figure 1. The enlargements show the negative cadmium plate in normal crystal structure of a new cell, crystalline formation after use (or abuse) and restoration.
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2011年3月22日星期二

Apple’s true revolutionary change has been conceptual

The iPad 2 is a solid, highly-progressive update and it’s only going to disappoint one kind of consumer: someone who was hoping that Apple would somehow completely redefine the greatest new tech product of 2010 in its second incarnation.
Naw. All of the 2011 iPad’s improvements and new features are answers to the question “What would the first iPad have been like if its engineers had been given another year to work on it?” They’d certainly have tried to make it faster and sleeker, and they’d have figured out how to stick a camera or two in there. Done, done, and done.
(Their in-house case also wouldn’t have been a chintzy-looking plastic sleeve, either. Done.)
The iPad 2 is the same iPad. It’s just better in every conceivable way.
After a week with the iPad 2, I’ve come to realize that Apple’s true revolutionary change has been conceptual. The first iPad wasn’t just a new product ... it was a whole new category of computer. I think in 2010, Apple instinctively understood that with something this different on their hands, they couldn’t go for broke. They could only lay out their cards and imply the iPad’s many strengths and then they’d have to stand back and watch what happened. After all of their efforts, they could only hope that consumers and developers figured out what the iPad was on their own. Only then could Apple make their next move, based on those reactions.
It all could have gone very badly. If Apple had sold the iPad explicitly as an ebook reader, the first complaint would have been “Why does this cost twice as much as a Kindle?” If they had gone the other way and suggested that the iPad was a substitute for your notebook, then any sensible consumer would have pointed out that while the iPad 1 was far more affordable than the cheapest MacBook, $500-$875 could buy any of a number of powerful, name-brand Windows notebooks.
Selling 15,000,000 iPads in nine months must have filled Apple with a certain degree of confidence that the world had truly gotten the point.
The public got it: the iPad was no mere accessory to a desktop and while it certainly earned best-in-class honors as a reader, media player, and document-viewer, there was no need to limit one’s perceptions of the device. The iPad was, and is, truly an entire new class of computer. Many of you were around for the transition from text to graphical user interfaces. Some of you were even around when the world shifted from mainframes to personal computers. Well, congratulations: you’ve lived to see your third revolution in computing.
The original iPad was the lap that the race cars take around the track just to heat up the tires. The iPad 2 is where Apple starts driving aggressively. Last year, Apple implied that the iPad might be able to replace your notebook. This year, Apple seems to be saying that the iPad 2 could replace ... notebooks.
Well, maybe they’re not behaving quite that aggressively. Apple does make a lot of money off of those MacBooks, after all. But the power of the iPad 2 and Apple’s concurrent release of two new built-in-house iPad apps for desktop-grade music composition and movie editing — creative tasks that no previous mobile device has been capable of doing, even poorly — makes it quite clear to me that Apple wants you to ask yourself a rather profound question:
Did you really need a notebook in the first place? Or did you buy it just because at way back in the Pre-iPad Era, a notebook was the only mobile device available that could handle such a wide variety of tasks?
(If you happen to have read this next to an oak-paneled room where you can sink into a leather club chair with a brandy and a cigar and spend a few hours in thoughtful contemplation, I invite you to walk in there to do so right now. It’s that kind of question. I’ll wait here.)
One thing that’s immediately clear: such a question would never even occur to me if the subject were any of the other iPad-like tablets due to be released in 2011. If Apple’s message to consumers is “Consider an iPad as your next computer,” their message to the competition is “We think it’s so adorable that you believe you’ve got anything that can possibly compete with this.”
“Thinner. Lighter. Faster. FaceTime. Smart Covers. 10-hour battery.” That’s the tagline you’ll find on Apple’s site. Let’s run through ‘em one by one.
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Five strategies help get the most out of the rechargeable batteries in Your laptops

Five strategies help get the most out of the rechargeable batteries in Your laptops - http://www.bestlaptopbattery.co.uk

Batteries are made to be used, so use them.
Just like couch potatoes, batteries need exercise. The chemicals in Lithium-Ion batteries respond best to regular recharging. So if you have a laptop, don’t keep it plugged in all the time; go ahead and let it drain to about 40 or 50 percent of capacity, and then recharge your computer.
The life of a Lithium-Ion battery can be measured in charge cycles. A charge cycle occurs when 100% of a battery’s capacity is used. Let’s say you use 50% of your laptop’s battery one day, charge it overnight, and then you use 50% of the battery again the next day. Even after charging it back up again, you’ll have only had one charge cycle occur. Most Discount hp nc6400 battery are rated for a useful life of at least 300-500 charge cycles, but high-quality, properly maintained batteries can retain up to 80% of their original life, even after 300 cycles.
Periodically calibrate your battery.
Most batteries that have a “fuel gauge”, like those in laptops, should be periodically discharged to zero. This can be accomplished simply by letting your computer run until it reports a low-battery state and suspends itself. (Do not let your computer deep discharge, as I’ll explain in the next item.)
The gauge that measures the remaining power in your laptop is based on circuitry integrated into the battery that approximates the effectiveness of the battery’s chemical compounds. Over time, a discrepancy can develop between the capacity that the internal circuitry expects the battery to have and what the Hp hstnn-ib33 Laptop Battery can actually provide. Letting your computer run down to zero every month or so can recalibrate the battery’s circuitry, and keep your computer’s estimates of its remaining life accurate.
Don’t practice so-called deep discharges.
Most laptops will suspend operation if the battery drains too low. Even if your computer goes to sleep, though, most batteries that are in good working order will still have a reserve charge available. This reserve will hold the computer’s working memory in state for a little while. A deep discharge has occurred when even that percentage of reserve power is used up. The computer will have turned off completely, and sometimes you’ll notice that it will have lost track of the correct date and time. Deep discharges will strain your batteries, so try to charge them frequently.
Avoid exposing your battery to heat (when possible).
Heat can overexcite the chemicals in your battery, shortening its overall lifespan. In fact, it’s been speculated that the biggest cause of early battery expiration is the heat that batteries can be exposed to when they’re stored in computers that are running off AC power. Laptops — especially modern multi-core machines — can get very hot when they’re plugged in, easily over 100 degrees Fahrenheit. That’s hot enough that extended exposure will negatively affect your battery. If you want to be really protective, there’s nothing saying that you can’t pop the battery out of your laptop if you’re going to be within reach of a power outlet for a while.
There may be times that you can’t help but expose your laptop battery to heat; you may live in a warm climate, for instance. You can, however, try and avoid exacerbating the issue. Make sure your laptop is well ventilated and that you’re not operating it on a surface that retains heat, even when you’re not plugged into mains power.
Store your batteries properly.
If your laptop or portable device isn’t going to be used for a while, you should remove its Lithium-Ion battery, if possible. Even if the battery can’t be separated from the device, it should be stored in a cool environment at about one-half charge. Cool temperature is recommended by experts because that can slow the natural discharge that batteries will undergo even when they’re disconnected from their device.
I’ve seen some people go even further and recommend that spare Hp dv2000 Batteries be stored in the refrigerator. I don’t think this is a very good idea; I’m concerned about condensation that might build up. Don’t put your batteries on ice, but keep them out of the sun.
Ultimately, I believe that buying spare Li-Ion batteries is a losing game, because the batteries start degrading as soon as they’re manufactured. Usually those Hp dv6000 Batteries spend most of their time sitting in a charger, losing useful life. If you need to be really mobile, you’re better off purchasing an adapter cable you can use with the power sources available in planes, trains, or autos. And, of course, by taking good care of the battery you already have.
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2011年3月17日星期四

Japan's Internet remains essentially unimpaired for disasters

Japan's Internet remains essentially unimpaired for disasters

As Japan deals with the aftermath of its strongest earthquake ever, a devastating tsunami, and potential nuclear disasters, the nation's Internet has managed to survive and provide emergency communications for workers and displaced family members, according to networking monitoring firm Renesys.
Out of 6,000 network prefixes, only 100 have beenwithdrawn from routing tables, and traffic from Japan apparently remains essentially unchanged,according to Google. It could be considered just another Internet survival story, but considering the extreme conditions in Japan, it's remarkable that the nation's telecommunications networks have done so well, says James Cowie, CTO and co-founder of the firm.
"I hope that we (the U.S.) have done as good a job in engineering as the Japanese did," Cowie says. "This has come off, from an Internet perspective, with far less impact than I would have thought, and that is due to Japanese network engineering."
Traffic into and out of the Japan Internet Exchange fell by about 20Gbps to 30Gbps on the first day following the earthquake but quickly recovered. In fact, the breaks in the undersea telecommunications cables, thought to be Pacnet's EAC cable system, affected the Phillippines and Hong Kong more than Japan, although the overall impact was still small in both areas. Telecommunications firms have used a second set of cables to route around the damage Pacnet EAC cable system.
In 2006, the Hengchun earthquake, which struck just south of Taiwan, damaged the undersea cables provided that nation's communications, disconnecting the country from the global Internet,according to Renesys.
The earthquake is the worst on record for Japan. In 1923, the Kanto earthquake, which had been the strongest temblor at a magnitude of 7.9, caused widespread damage and fires in Tokyo, killing 143,000 people. In 1995, the 7.3-magnitude Hanshin quake near Kobe killed 6,400 people. The latest quake, which has a recently adjusted magnitude of 9.0, and the resultant tsunami has killed thousands of people.
For emergency workers and people trying to reach family members in hardest-hit prefectures of Miyagi, Iwate, and Fukushima, Internet communications have become a lifeline, says Cowie.
"There are people who said that I couldn't use my cell phone, I couldn't use my fixed line phone, but the Internet was still up, so I could get word out to my family that I'm OK," he says.
The longer chaotic conditions continue in Japan, however, the greater the likelihood that some outages will occur. Like the Northeast power outage during the ice storm of 2008, companies may find that fuel reserves that are powering telecommunication hubs' backup generators run out, potentially leading to more significant outages, Cowie says.
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Toshiba Satellite Laptop Reviews by bestlaptopbattery.co.uk

Toshiba Satellite Laptop Reviews by bestlaptopbattery.co.uk

If you are a current resident of England you will soon have two new Toshiba laptops available to you, April to be more precise. The Toshiba Satellite C670 and C670D are both 17.3″ laptops but the two are based around two different and competing processing technologies from Intel and AMD.
The C670 is the Intel based model with the C670D being (Toshiba Pa3356u-3bas Batteries
Toshiba pa3285u-3brs Batteries) the AMD based model. Inside the C670 is an Intel Core i3 processor and Intel HD Graphics on the base model. The C670D is going to feature one of the new AMD Brazos Fusion APU’s from the Zacate E-series to be exact.
Toshiba Satellite C670 and C670D back
As for other tech specs. for the two models you can expect 17.3″ displays with Toshiba TruBrite LED technology and HD resolutions. You can also exptect to have options for up to 8 GB of DDR3 RAM on both models and for the C670 you will be able to have Nvidia GeForce 315M graphics.
Some other things to expect for both notebooks are 2x USB ports, 2.0 ports, a multi card reader, 802.11 b/g/n WiFi, Bluetooth 3.0 + HS, a 10 digit numeric keypad with multi touch controls, a VGA web camera and a DVD Super Multi drive.
Toshiba hasn’t shown any indications at this time for launching these two notebooks in the US. Also pricing for the UK hasn’t been released yet but from the specs. we can take a guess the pricing will be affordable across both models.
MSI and their C-series of laptops has grown to have a dozen different models for you to choose from with the addition of two new models. Each of the two new C-series laptops offer you access to the latest and greatest processors from Intel’s new Sandy Bridge line-up of Core i3/i5/i7 CPU’s.
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