2011年2月28日星期一

How Much Internet Access Is Too Much for Kids?

A few nights ago my older son stood in the kitchen and read me this quote from the March issue of National Geographic."How big is 7 billion?" he asked.
I shrugged.
"In years it's half the universe's age," he said. "In text messages, it's the US total every 30 hours."
That means Americans text each other 7 billion times in a little over a day. Wow. But the truly shocking thing wasn't just the number. It's that my older son stood and read a magazine out loud to me—and didn't shout at me from his room to come look at something on his laptop that he had downloaded from the Internet.

When I was growing up, we had two TVs in the house. My good friend's older brothers had Atari video games but they were a novelty. No one I knew had a computer. My little brother and I weren't allowed to watch TV during the week. After we finished our homework, we read, maybe called a friend, then went to sleep. Bedtime was 11 p.m. If I tried to call a friend past 11 p.m., my mother would have heard me dialing and would have raced down the hall to stop me. Even if I had managed to get past her auditory sensors, I would have been too terrified to make the call because I knew my friends' parents would hear the phone ring, pick up and yell at me for calling too late.
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This was way before you could set your cell phone to "vibrate."
Technology was limited way back then and what was available was noisy and expensive, but then, as now, it was also a wonder. In college, I started using the computer to type papers; the library had a bunch of terminals and my close friend taught me how easy it was to save and revise your work. My grades went up, my writing improved, everything was better. I loved computers.

At my first and second jobs out of college, I sat in front of a computer all day long and typed. I still do. So how can I expect my kids to be any different?

The problem is the tremendous number of distractions available. A few nights ago I was trying to help my younger son create a survival guide for one of his characters in The Sign of the Beaver. His reading teacher had given the class an interesting assignment: The students were to supposed to create their own book, with pictures, that would give advice to one of the characters on how to survive in the forest alone. My son was going to "tell" this character how to make a bow and arrow, spear and cook a fish, stay warm, make a rain poncho, create a snare and treat himself for insect bites, among other things. My son had handwritten his survival notes and needed to sit down at the computer to type them up and write his "book." He called up a Word document on my husband's Mac, and while he was waiting for Word to open the document, he opened up his iChat account and called up a video game that let him "play" basketball.

I saw two little human faces pop upon the screen. Two of his friends were available to chat. "Shut that down," I screeched. More kids kept popping up, little words following their faces on the screen. "What is happening?" I yelled. "Get rid of them, you have work to do."

My younger son started typing. "I'm going to say my status is my Mom is yelling at me and I can't chat."
"That's right," I said.
"Some kids do their homework together on iChat," he said knowingly.
"They're not getting anything done," I snapped.
The iChat boxes kept popping up. The 10-year olds were multiplying. All these kids available to type hello. My older son came downstairs with his laptop. He wanted to show me the "talking crabs" he had put on an email to his stand-up comedy instructor. He saw me pointing at the iChat boxes and convulsing.
"Tell him to log off," he said matter-of-factly.

I should just admit that because I knew I had to write this piece, I had to restrain myself from running upstairs and typing up my notes for this story on on my Mac.

What is happening to us? Why are we all so hysterically addicted to what the Internet has to offer?

Last weekend, my husband and I and our 10-year old went to a bar mitzvah. (Our 14-year old had his own plans). The party was lovely. Great music, delicious food, funny and original decorations. The theme was Archie comics. There was a professional ping pong player to keep the kids busy and a man with a typewriter (!) who was available to type up your life story in 60 seconds. The kids were well behaved. We were having fun.
For a while, I stood with my friend, who had also brought her 10-year year old. Sometimes you love your friends as people, but not as parents. I love this friend as a person and as a parent. I normally agree with all the parenting decisions she makes, and our sons have spent a lot of time together. We were drinking Cosmopolitans and talking about the books we were reading. She was reading "Cleopatra" and had just finished "Racing in the Rain." I had just finished "Great House." We were feeling slightly drunk and well-read, a lovely feeling on a Saturday night.
Then my son came up to me. "I want a Droid, can I get a Droid?" he begged. My friend's husband had just gotten their son a Droid and he was playing games on it while my son watched him. This was what they were doing at a party? Eventually, my son became jealous and impatient and started to nag me for a Droid. The happy buzz I had going turned to rage. Finally, I begged my friend to ask her son to put the Droid away so I didn't lose my mind.

Later in the evening, the father of the bar mitzvah boy stood up to toast his wife, his sons, their relatives and all the guests. He held up a glass and said: "We're grateful for everyone who is here despite their intense school, athletic, artistic and video game/texting/iChatting commitments. Here they can see each other live, a novel concept these days."

Seeing each other live is a novel concept. Doing anything live is hard when what the computer offers is so available and entertaining. Things that were once off limits are completely accessible. We have three iPods in our house, two Macs, one Kindle and one iPad. My older son treats his laptop like his little lapdog (apologies to Chekhov). It pretty much goes everywhere with him. My younger son is a voracious reader and usually reads before he goes to sleep. But the other night I walked in and he quickly hid his iPod under his blanket. I wanted to cry.

I will pretty much let my kids read anything these days just so they don't play video games or surf the Net. My older son read all of James Frey (both his notorious memoirs "A Million Little Pieces" and "My Friend Leonard," as well as his lackluster novel "Bright Shiny Morning"). My younger son just finished Megan McAfferty's five-book series "Sloppy Firsts," "Second Helpings," etc. and is starting Suzanne Collins' "Hunger Games" series.

I know some people might wonder why I'm letting my kids read books with adult subject matter. I just want them to read and I want to make the experience as interesting and pleasant as possible. When my kids read books, they like to talk about what's in them. I love the discussions that ensue and I know there is a lovely, calm, restful feeling that settles over their brains when they snuggle into the couch and lose themselves in a book. You just don't get that in front of a computer or a hand-held device.

When my kids play video games, secretly download "Family Guy" or log onto Facebook or iChat, they don't talk. They just sit quietly in front of the computer, their eyes glazed, typing into the void. Though my older son recently finished "The Diary of Anne Frank" and is in the middle of reading "The Crucible" for school, he hasn't finished a book for pleasure in a while and I know it's because he's on the computer, entertaining himself electronically.

Over Presidents Day weekend, my in-laws took my younger son to their house outside Philadelphia. My mother-in-law wrote this email to my son before he went to see them: "I just put some brownies in the oven in celebration of your visit. And Grandpop went in the city and bought tickets for a new museum (American Museum of Jewish History). Of course, we will have to fit in some Monopoly and Ping Pong." It sounded so old-fashioned and so wonderful.

That said, I admit I'm waving the white flag here because most of the time I'm just as bad as my kids. I know how pleasurable it is to search for and find information right away. I know how time consuming it is to look words up in a dictionary, and how much easier it is to just type what you're looking for on dictionary.com. I know it's liberating to post whatever video catches your fancy up on your Facebook wall. It's fun to watch old episodes of "Saturday Night Live" and new episodes of "30 Rock" whenever you feel like it. I teach a two-hour writing class on Thursday afternoons and at the end of two hours I'm proud that I've managed to go that long without grasping for my Blackberry.

Before I sat down to write today, I read my email. There was a note from the Huffington Post announcing that the photos from Carine Roitfeld's last shoot for French Vogue were available. Oh, let's go see! I don't know Carine Roitfeld from a hill of beans and I rarely look at French Vogue, the magazine she edited for 10 years. But I had read about her resignation/firing in The New York Times last week and the article intrigued me. Was she pushed out or not? Apparently, her resignation had something to do with provocative pictures of young girls she ran in the March 2011 issue, which ended up being her final issue. I read one story online about Roitfeld, and then another. Then I remembered I had to get to my older son's wrestling match in by 3:45. Ten minutes had passed and I was no closer to finishing this essay about the addictive nature of the Internet and how to stop our children from becoming addicted than I was when I first sat down at the computer. In fact, I was further away because I had forgotten why I had sat down in front of the computer in the first place.

My husband doesn't think there's anything wrong with technology. He recently got an iPad for work. He loves it. For a while, he would bring it into bed and describe how easy it was to read and watch stuff on it. He started staying up later and later, pounding away on the iPad. "Please turn off the light," I'd say. Then I'd fall asleep while he continued working/playing on his iPad. "You know feng shui says you're not supposed to have electronics in bed," I said one night. My husband had given me a book about feng shui in the bedroom for our anniversary, and I had written an article about feng shuia few years ago so it wasn't like I was talking out of my butt. "Reading battery-(dell battery, toshiba battery hp laptop battery)operated toys in bed isn't romantic. According to feng shui, you're not even supposed to have a TV in the bedroom." He finally agreed to take the iPad into the bathroom.

Believe me, if it weren't for the Internet, I wouldn't be writing this column. After years of being a stay-at-home Mom, I started a blog in 2007. My blog was picked up by a New York Times blogger, which led to a teaching job, which led to an assignment writing for the Times, which led to another teaching job, which led to my having the confidence to pitch this column to the Patch. As you know, the Patch is only available online.

But we have to find limits. A story in the February Mensa Bulletin predicts within ten years we will be using "virtual retinal displays." The story was about Augmented Realty (AR) and speculated we could be walking around with bionic contact lenses in our eyes. We won't have to look at our smart phones. We might not have to ask each other for help at all.

A couple of days ago, my husband asked me if we subscribed to Sports Illustrated. I knew why he was asking; the new swimsuit issue was out. "Yes," I said. "The kids read it but it hasn't arrived yet." It came the next day. My kids were ecstatic; they fought over it. They compared it to Playboy, which they had seen at the barber shop and probably at sleep-away camp. I'm sure my 14-year old has found similar (and probably more explicit) pictures online without us knowing it. The SI photos of beautiful, young scantily clad women was a bit much for my 10-year old to absorb, but I was glad to overhear the conversations that followed between him and his older brother. "Don't touch it!" "My turn!" "You ripped it!" "You're a hog!" If they had been looking at the pictures online, the door would have been shut and I probably wouldn't have heard a word.

2011年2月27日星期日

RIM BlackBerry Bold 9780 smartphone

RIM's latest BlackBerry(BlackBerry battery) Bold offers an upgrade rather than a revolution. The BlackBerry Bold 9780 looks identical to its Bold 9700 predecessor, but features more memory and the new BlackBerry 6 OS. A refreshed home screen, various software improvements and a better Web browser are improvements.

Check out our guide to the best BlackBerry smartphones on the market, and read our comprehensive BlackBerry Bold 9700 review.

The BlackBerry Bold 9780 smartphone has an almost identical design to its Bold 9700 predecessor. A glossy black bezel surrounds the edges (rather than a chrome one) and the keyboard curves slightly upwards at the ends. The BlackBerry Bold 9780 is a very comfortable size to hold and feels well built; the battery cover is study and doesn't rattle or wiggle when pressed.

Despite a small, 2.4in display, the Bold 9780's screen is one of the best we've seen on a BlackBerry; it is bright and possesses good viewing angles. Like most BlackBerry smartphones, the Bold 9780 has a best-in-class physical keyboard that provides great tactility and is comfortable to type on for long periods.

The BlackBerry Bold 9780 is controlled mainly via an optical trackpad. It has no moving parts and you simply glide your finger across an almost flat surface. The speed of on-screen movement and scrolling using the trackpad takes a little getting used to, but it is responsive; its sensitivity can be changed in the settings menu.

The BlackBerry Bold 9780 runs BlackBerry 6 OS. The home screen looks attractive, and uses a very handy notifications bar that drops down when you select it. This shows all your notifications including e-mail, calendar, text messages, and social network updates. The BlackBerry OS 6 also integrates "Social Feeds," aggregating feeds from Facebook, Twitter, RSS and BlackBerry Messenger among others.

The BlackBery Bold 9780 uses what RIM calls a "drawer" to store applications. Swiping across the screen will access different draws; all of your applications (main menu), your favourite apps (user definable), media, downloads from BlackBerry App World, and frequently used applications. Unfortunately, these drawers can't be edited or modified, apart from choosing what to place in each one.

The BlackBerry Bold 9780 has an excellent universal search tool, and the handset offers a much better Web browsing experience than previous BlackBerry devices. Zooming in on a block of text automatically makes it fit to the width of the screen, and you can open new Web pages in tabs (then scroll through them using an excellent Cover Flow–like view). Panning around a page using the cursor and clicking links is still inferior compared to other handsets. There is also no Flash support.

Though many aspects of BlackBerry OS 6 have been improved we still feel it is best used with a touchscreen. For example, the BlackBerry Torch 9800 enables you to tap the notifications bar for notifications, the clock to set an alarm and the speaker to access sound profiles; all more intuitive than using the trackpad to scroll around the screen.

Being a BlackBerry device, e-mail support is as strong as ever. The BlackBerry Bold 9780 supports e-mail services through the BlackBerry Internet Service (BIS) and BlackBerry Enterprise Service (BES). Microsoft Word and Excel documents can be edited and viewed thanks to the on-board Word To Go and Sheet To Go applications. In addition to 3G connectivity, the BlackBerry Bold 9780 has Wi-Fi, GPS and Bluetooth capabilities.

The BlackBerry Bold 9780 provides access to BlackBerry App World, RIM's third-party app store. It doesn't boast the same number of apps as Apple's App Store or Google's Android Market, but paid apps can be purchased in Australia (using PayPal) and most of the popular apps (such as Facebook, Twitter, eBay and Windows Live Messenger) are available.

The Bold 9780 is also capable media player that features a refreshing interface, and the 5-megapixel camera also doubles as a video recorder. One real positive is the BlackBerry 9780's smart phone battery life — it often lasted almost three days during testing, placing it far ahead of most of its rivals and making it a handy device for road warriors.

2011年2月24日星期四

Ditch The Cords! Power Your Electronics On A High Tech Pad

Imagine a world with no cords; no figuring out where to plug your cell phone or your toaster oven or your television. It is exactly the kind of world Ran Poliakine, CEO of Powermat, is trying to create. The kitchen in his Israel home is cord-free. When he wants to wash his coffee maker, he puts the entire thing in the dish washer. There are no cords. His kitchen appliances receive power by simply being placed on the counter, thanks in part to the wireless charging technology his company develops.
The technology was initially used to charge cell phones and hand-held devices. The way it works is simple: first you place a case with a power receiver on the device. Then you place it on a Powermat mat, which transmits charge to the battery. When the battery is full, power stops flowing to the unit, fully charging your device and saving you money on your power bill.

FORBES first reported on the company last year when the technology was just starting to take off. Since its introduction in 2009, Powermat has sold more than 3.1 million of its units around the world at retailers such as Best Buy, Target, Wal-Mart, Amazon, Bed Bath and Beyond, Staples, and Brookstone.  It’s the market leader with about 90 percent share. But as it continues to try and maintain dominance in an industry expected to grow over $11 billion by 2020, Powermat must find a way to integrate into people’s everyday lives.

“We are trying to do to electricity what Wi-Fi did to data,” said Poliakine. “We are practically eliminating the need to drag with you many, many, many cords with power supplies, enabling users to power and charge their devices without the need of cords.”
So Powermat is expanding beyond hand-held devices and partnering with other device makers to install Powermat receivers in their products. For example, the company has a partnership with Haier with plans to put Powermat receivers in air conditioners, washing machines, and refrigerators.

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Poliakine’s strategy also involves implanting the charging technology into surface areas, such as furniture, counter tops, car dashboards, and even walls so you can hang a TV without cords. Powermat is even expected to appear in airports so travelers can easily charge their cell phones between flights.

And it’s just been announced that it’s implementing its technology into all 2012 GM Volt cars.

“Our vision in time is to make sure that there is an infrastructure; every table, every kitchen countertop, every hotel desk will have this infrastructure that will enable you to effortlessly just place your laptop or your cell phone or your lamp on the surface and get the right amount of power,” said Poliakine.

Take a look at the video below to see Mr. Poliakine’s own kitchen using the technology.

2011年2月23日星期三

Sony VAIO SB Series (VPCSB16FG) 2nd Generation Intel Core laptop

The Sony VAIO SB Series (VPCSB16FG) represents all that is good about mobile computing: it's a thin, light, well built and attractive 13in laptop, and thanks to 2nd Generation Intel Core CPU technology, it also possesses great battery life and fast performance. We're quite taken by it, and think it's an excellent buy for business users, and indeed anyone who wants a well featured 13in laptop. It may even convert some Mac users.
    Business users with an eye for style and a need for speed will love the Sony VAIO SB Series (VPCSB16FG). It's a 13.3in notebook that runs Intel's 2nd Generation Core i5 CPU (otherwise known as Sandy Bridge), so you know it's very fast, and it also has a slim and light (1.7kg) body that feels sturdily built. Best of all, it has a sony battery that will last almost for an entire workday. We like it a lot, especially since it also has a reasonably cheap price of $1499, and we also think it looks and feels much better than the Macbook Pro.

    VAIO SB Series: Look and feel

    The VAIO SB Series is the type of laptop you just don't get tired of using. It has good looks and a very comfortable keyboard with isolated keys that are backlit. The backlight has a slightly purple hue and it's a beautiful thing to look at while you type for long periods into the night. The other great thing of the SB Series is that its build quality is very sturdy, yet it's also a very light notebook. It won't be a chore to carry it to and from the office each day, and you won't get tired of using it on you lap for long periods of time either.
    When used for long periods of time, the base will get a little warm, but it won't be enough to make you feel uncomfortable, unless you are constantly running programs that require a lot of CPU or graphics power. There is a cooling fan installed in the rear of the chassis, and it kicks in when the CPU or graphics adapter is under a heavy load; it's a relatively loud fan and it can get annoying if you are using the laptop to crunch heavy workloads while you're in a quiet room.

    VAIO SB Series: Specifications and performance

    But the VAIO SB Series is more than just a good looking and well-built laptop. It's also very fast. It recorded times of 41sec and 50sec in our Blender 3D rendering and iTunes MP3 encoding tests, respectively, and it only took 57min to transcode a DVD file into a 1.5GB Xvid file. This performance can be attributed directly to the 2.5GHz 2nd Generation Intel Core i5-2520M CPU, which is one of Intel's latest and greatest. It runs more efficiently than the first generation Intel Core i5 CPUs, and it can even hold a candle to first generation Intel Core i7 CPUs (see how it compares to the Dell XPS L501x(dell xps m1530 battery), for example). The Core i5-2520M is a dual-core CPU with Hyper-Threading (so it essentially runs as a quad-core CPU) and it utilises Turbo Boost. When the thermal conditions are right for it, the CPU increases its speed automatically up to a maximum of 3.2GHz. We noticed that it ran at 3GHz for the majority of the time during our tests. The Dell Latitude E5520(dell latitude d630 battery), which runs a 2.6GHz 2nd generation Core i5 CPU (Core i5-2540M), also ran consistently at this speed.
    The rest of the VAIO SB Series configuration is 4GB of DDR3 SDRAM, a 320GB, 5400rpm hard drive and a dual-graphics setup. The VAIO SB can make use of either the integrated Intel HD 3000 graphics in the CPU, or it can run the AMD Radeon HD 6470M discrete graphics adapter. The two graphics cards are included so that you have a choice between boosting the 3D graphics performance when you need it, or prolonging longer battery life when you are travelling. The difference in dell battery life between them is huge!
    A physical switch is located just above the keyboard, which allows you to choose from 'Speed' or 'Stamina', and you don't need to restart the system any time you switch. The difference in performance between the AMD Radeon HD 6470M and the integrated Intel HD graphics is less than 1500 in 3DMark06 (5185 for Radeon graphics and 3760 for Intel graphics), which is not significant. Apart from a little more speed, the Radeon adapter gives you DirectX 11 support.

    VAIO SB Series: Battery life

    In terms of battery life, when you switch to Stamina mode, the power profile changes to 'balanced' and the integrated Intel HD graphics are used. In our toshiba laptop battery rundown test, in which we loop an Xvid-encoded video, Stamina mode gave the laptop a life of 6hr 5min away from an outlet, which is a brilliant result. If you weren't watching videos all day and wanted to get some work done, you could realistically get a whole work day out of the battery. A second battery can be added to the VAIO SB Series (even while it's running), which well and truly supply you all day battery life, but of course, add a little more bulk to the laptop.
    When we switched to Speed mode for our standard battery test, in which we disable power profiles, enable Wi-Fi, maximise screen brightness and loop the same Xvid-encoded video, the vostro 1510 battery lasted a more modest 3hr 19min, which is still a great result when compared to other 13in laptops we've seen, such as the Samsung Q330.

    VAIO SB Series: Other features

    Other features that make the VAIO SB Series notebook stand out include the beautiful backlit keyboard that we mentioned earlier, an ambient light sensor, which detects the amount of light in a room and adjust the brightness accordingly (it worked very well during our test period and at all times made the screen a pleasure to look at), a movement and vibration sensor for the hard drive, and a fingerprint reader.
    You can use the fingerprint reader for security when logging in to the system, and you can also use it as a way of quickly logging on to regularly used sites -- when you're about to enter your login details for a Web site, the credential management software will ask you if you want to store the details so that they can be accessed by a swipe of your finger next time around.
    The screen of the VAIO SB Series is very thin (around 6mm) and it's held by reasonably strong hinges. It has a matte finish that's not prone to reflecting room lights, so it's perfect for use in an office environment. It's easy on the eyes and it has decent viewing angles. Its native resolution of 1366x768 is standard for a 13in notebook.
    Around the edges of the Sony's base you will find a slew of useful connectivity and a built-in DVD burner (its eject button is just above the keyboard). However, all the ports (except for the headphone port) are located on the right side of the chassis. This can be a problem if you're a lefty and need to use a corded mouse, as you will have to run the cord around the back of the screen.
    The array of ports includes USB 2.0, VGA, HDMI, Gigabit Ethernet, and most impressively, a USB 3.0 port. You also get a webcam, separate SD and MemoryStick Duo slots, a physical Wi-Fi toggle, a combination headphone/microphone port, and 802.11n Wi-Fi.

    Conclusion

    With a weight of only 1.7kg, and a magnificent combination of good looks, useful features, super-long dell xps m1330 laptop battery life and fast performance, the Sony VAIO SB Series (VPCSB16FG) is sure to stand out from the crowd for a long time to come. It's one of our favourite notebooks to date and we think any user who is in the market for a light and powerful 13in laptop should put this right at the top of their consideration list. Executives, in particular, will be very pleased with it.

2011年2月21日星期一

Keeping control: Why Lithium ion batteries for automotive applications need sophisticated monitoring schemes

With the increasing price of oil and the growing pressure on countries to reduce their carbon emissions, the electric vehicle – or a hybrid such as the Toyota Prius – is becoming more attractive by the day.

Why Lithium ion batteries for automotive applications need sophisticated monitoring schemes
   
Seemingly a simple solution, the battery powered electric vehicle presents a range of challenges to vehicle designers and to the electronics engineer. Erik Soule, vice president of Linear Technology's signal conditioning products business, said: "There is a lot of power involved in an electric vehicle and bad things can happen if you don't manage it properly."

Linear has addressed the issues with the LTC6802, launched a couple of years ago. "But the electronics have proved to be tougher than people thought for a number of reasons," he noted. "For instance, there are high voltages and the process needs extreme precision, as well as noise immunity. It's a problem when inverters switch at 20kHz because they radiate emi with a large number of harmonics, so you also have to filter all that out."

Other requirements include reliability, fault tolerance and diagnostics. "All of this is being driven by the ISO26262 automotive safety standard," he continued. Lithium ion is now the preferred dell latitude d630 battery technology for electric and hybrid vehicles. It offers, amongst other things, the ability to support more charge cycles, higher energy density, a better self discharge rate and a higher cell voltage. But lithium ion comes with a 'health warning'.

"Lithium ion batteries must be treated with respect. Fires have occurred in notebook computers because overvoltage peaks were not monitored correctly," said Steve Sockolov, director of Analog Device's precision signal processing group. "Although the quality of battery fabrication has improved, guarding against higher temperature conditions in any energy, industrial or automotive application is critical." "There are a number of issues relating to the batteries in an electric car," Soule reflected. "When the battery is charged, for example, you want to know as a driver how much energy is left. But from the system point of view, you want to know whether all the cells are balanced. We're looking at 1mV precision over a range of temperatures."


Prius' power pack and drive train.

Linear product marketing engineer Greg Zimmer explained in more detail. "Li ion battery performance depends on battery temperature and age, battery charge and discharge rates and the state of charge (SOC). These factors are not independent. For example, Li-ion batteries generate heat when discharged, which can increase discharge current. This has the potential to create thermal runaway and catastrophic failure.

Meanwhile, charging a Li ion battery to 100% or discharging to 0% will degrade its capacity, so it needs a restricted SOC range, such as 20% to 80%. This means the usable capacity is only 60% of the specified capacity. Because a 1% change in SOC may only be indicated by a few mV, the battery system must monitor this cell voltage accurately." Accuracy, in Soule's opinion, starts with a voltage reference. "Less obvious, but equally important, factors include thermal hysteresis and long term drift. Remember, the electronics in an electric vehicle may be on '24/7' for 15 years."

The LTC6802, which can monitor and control 12 lithium ion cells, is more like an analogue front end, said Soule. "We're looking at dealing with 100V in the analogue domain, while using fine cmos technologies for the digital side." Analog's offering is the AD8280, a hardware only safety monitor for lithium ion battery stacks. While the part has inputs to monitor six dell m1530 battery cells and two temperature sensors, it can be daisychained with other AD8280 devices to monitor hundreds of cells.

Information about the status of the alarms on the entire daisychain, as well as input signals that enable the part and initiate self test, are communicated via a master device. Intersil is also interested in this area, recently launching the ISL78600 battery management system. Each ISL78600 features a 14bit temperature compensated data converter that scans 12 channels in less than 250µs, measuring cell voltage to within 2mV.

A high noise immunity and transient tolerant communication scheme is used to link devices. This fully differential daisychain architecture allows the use of low cost twisted pair wiring for multiple battery packs. The part can link with a microcontroller using spi or i2c interfaces.

Custom system for electric vehicles
Nuvation Engineering, a US based provider of electronic design services, has developed a custom dell vostro 1710 battery management system, fuel gauge and driver interface specifically for electric vehicles. The system is currently featured on the OptaMotive 'E Rex' – the electric equivalent of OptaMotive's T Rex.

"E Rex is a three wheeled electric car with six times the efficiency of a Prius, yet more torque per pound than a Porsche 911 Turbo," claimed Nuvation's ceo Michael Worry. "The E. Rex is capable of 0 to 60mph in 5s and has a top speed in excess of 100mph. The E. Rex proves going green can be fun and efficient." E Rex is powered by a battery pack featuring 106 lithium iron phosphate cells.



This 35kWhr pack is said to have a driving range of 200 miles and can be recharged in four hours from a 220V/40A supply. Power is supplied to the wheels using brushless dc motors. Working with Maxim, Nuvation engineers have designed the vostro 1510 battery management system around the MAX11068 to provide voltage monitoring, temperature monitoring and balancing. Fuel gauging has been implemented using Maxim's ModelGauge, which combines voltage measurement with coulomb counting to support continuous automatic calibration.

"The advanced battery management system monitors each cell's voltage and temperature to ensure safety, balanced cells for long range and long battery life and to optimise vehicle performance," said Worry. According to OptaMotive, the E Rex will have a range in excess of 100 miles and will return a fuel economy equivalent to 100mpg.

The MAX11068 is a programmable 12 channel battery monitoring data acquisition interface optimised for use with batteries used in a range of applications, including automotive systems. It integrates a simple state machine and a high speed i2c bus for laddered serial communication. The analogue front end combines a 12 channel voltage measurement and data acquisition system with a high voltage switch bank input.

All measurements are performed differentially across each cell. A high speed 12bit SAR a/d converter is used to digitise the cell voltages and all 12 cells can be measured in less than 107µs. A two scan approach is used to collect cell measurements and correct them for errors. Firstly, the voltages of all 12 cells are acquired, after which the a/d converter input is chopped to remove errors. Information is supplied to the driver of E Rex via a touchscreen panel, providing a high level view of what the car is doing, including how much charge is left in the dell xps m1330 laptop battery. The system controller is a single board computer running Linux.

2011年2月16日星期三

The greatest Information on Acquiring Cheap Laptop Computers

The greatest Information on Acquiring Cheap Laptop Computers
Ah sure, I wish a cheap laptop computers yet I am not going to spend several thousand dollars for one. Well guess what you don’t ought to. laptop costs have come down dramatically within the last year alone and also they may continue to do so as technology advances. Nevertheless the key right here is to look for great quality laptops that fit your needs at the most affordable costs on the market.

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I’d suggest that there most likely is a keep near you ideal now that has cheap laptop computers. In reality, lots of suppliers already have them. The reason being, such as any some other new item, laptops were once considered the ointment of the crop in the laptop or computer world that made them very high-priced. However, all that has transformed now. Laptops are a dime a dozen! The hand held digital assistants, Bluetooth cell phones and also tablet pads are new rage making laptop computers cheap.

Now, don’t obtain me wrong, this will not imply that they are cheaply made. Thanks to the wonders of the technological cycle, cheap laptop computers are decreasing in price as their capabilities rise. Naturally, there are the latest and also greatest monsters out there that are created for gaming or high powered multimedia applications and also these babies still cost a pretty penny.

Nevertheless for the average user, you can look for cheap laptop computers that give all the power you need and also in that case some. Each and every big manufacturer out there, such as Dell, HP, Compaq, Gateway, and also IBM have their reduced closing stages and also intermediate types that come with more compared to enough speed and also usability.

Now right here is the true secret to finding the right cheap laptop or computer laptop for you, and also which is to figure out exactly what you need it for.
Do you think you’re going to use it largely for surfing the web or word processing? Do you need it to work from residence or largely to save your MP3s and also digital pictures?

Ok, so now you’ve an idea of what you wish to use your laptop for. Now lets go out shopping and also compare. You can visit any of the top manufacturers websites or visit your local keep and also look for their low closing stages or intermediate types that could go well with your needs. The 3 top components of a laptop or computer you wish to seek out is the tough drive size, memory, and also processor speeds and also take notes of every model you look for on each component and also model.
The tough drive, you can think about this the brain of your laptop or computer, this is where all your files, applications and also folders are stored. If you plan on utilizing your laptop or computer for MP3s and also digital pictures your tough drive ought to be large since these files are normally very large. I personally would look at 80gb as minimum.

Next will be the memory, memory could be considered the thought processes of your laptop or computer. As a minimum I’d look at 512mb yet when you plan on utilizing your laptop for gaming naturally this ought to be considerably larger, in the area of 1 to 2gb. Now memory is made use of whenever a program or application is running. Hence the more memory you’ve the faster your laptop or computer can process the program.

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2011年2月15日星期二

Samsung Galaxy S 4G Is The Latest Big Phone To Have Android OS

The Samsung Galaxy S 4G is the same size and shape as the Vibrant; it’s a slim, slab-style Android phone with a bright Super AMOLED screen and a 1Ghz Samsung Hummingbird processor inside. But, well, for the first thing, the back is gray instead of black. I like the gray back better; the black one got a little greasy. The Galaxy S II is big on social and media hubs. Live Panel aggregates live Web and application contents to a customizable home screen. Customers can choose which online services and mobile apps appear on screen. SMS feeds, information and many more applications can all be embedded and accessed. The readers’ hub supports a massive digital library of 2.2 million books and novels. The games hub leverages the phone’s three-axis gyroscopic sensor, while the music hub provides access to over 12 million tracks from 7digital.

High-Speed Multitasking

The Galaxy S WiFi 4.0 has a 4 inch, 480 x 800 pixel Super Clear LCD display, a 1 GHz Samsung Hummingbird processor and runs google Android 2.2 Froyo. It has 802.11b/g/n WiFi, Bluetooth 3.0, GPS, FM Radio, and a has twin cameras: a VGA front-facing camera and a 3.2MP rear camera.There’s an accelerometer, digital compass, and 1200mAh battery. The star of the show is most definitely the Exynos 4210 dual-core processor with an integrated quad-core GPU though, which promises to enable high-speed multitasking, quick Web page loading, quick reaction speeds, a smoother UI, lightning fast image editing and high performance gaming. Samsung also claims that its encoding/decoding ability, which supports 1080p/30fps playback and shooting, outshines competing dual-core processors. The Galaxy S2 basically promises the kind of performance hardcore Apple fans want the iPhone 5 to provide, but it remains to be seen whether Apple will step up to the challenge.

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Netflix

The company announced that the future portable Android devices with the company’s Snapdragon CPUs will have native support for streaming movies and TV shows from Netflix. If that wasn’t good enough, it was also mentioned that the Netflix app will be easy on the battery life as well, since efficient dedicated hardware will be handling the video decoding, something that smartphone users will be happy to hear, since battery life in powerful devices has been an issue for a long time. The Netflix certification is also granted to the device, thanks to Snapdragon’s dynamic performance and media protection features.

2011年2月14日星期一

Putting productivity to the test: a real life story of a mobile worker

Three countries, 6 airplanes, 3 hotels, 4 offices, and 4 currencies in 6 days. That is a basic summary of this analysts European journey earlier this month. The question is, did technology and connectivity allow me to be productive despite my ever changing surroundings?
In Yankee Group’s 2010 Fastview CIO Priorities Survey, improving employee productive was named a top 3 strategic priorities among CIOs of large enterprises. It’s also a top priority of most managers today no matter what department they are in, and my boss is no different. So as a mobile worker, I thought this was the perfect experiment, with myself as the test subject, to see how the tools and technologies that we talk about all the time really hold up for a worker in constant motion.

As with any experiment, the first step is to make sure we have all of the supplies we will need. So as I headed to the airport for my transatlantic flight, I made sure I was armed with all the tools I would need – e-reader, laptop (the netbook stayed home on this trip in favor of the full laptop because I needed access to too many files and systems), blackberry (corporate liable device), iPhone (personal device on a carrier with global coverage, at least through roaming, and music player), assorted chargers and plug adapters, and a USB storage stick with the main presentation files I would need just in case. And for those wondering, yes my laptop bag with all of this stuff is heavier than my suitcase with my clothes for the week.

Now back to that transatlantic flight, its an overnight flight so while I am curious about inflight WiFi (not available) I don’t think too much about it as I should try and get some sleep to hit the ground running when I land. I do breakout the laptop till dinner service so I can peer review a colleague’s research report which I finish and now need to send back to him, okay so maybe in-flight WiFi would have been handy. For now sending emails has to wait so we turn to my E-reader and iPhone for the music as the devices of choice except for dinner when I watch a really bad movie. I did get a couple of hours sleep too so in terms of productivity that flight wasn’t so bad except for the lack of Internet connection.

Time to change planes and on the way to the next gate I grab a quick breakfast and look into airport WiFi. It’s pretty pricey in Europe and my mobile broadband card doesn’t work here so now its time for the cost benefit analysis. My blackberry shows me that with the US not awake yet I don’t have that much new email and nothing with attachments that I really need to work with. My next flight gets me to my destination just a few hours into Boston’s work day so its not worth the WiFi charges yet. I can wait till I get to the hotel. Flight number 2 boards and while I could use a nap, I need to work on a presentation for a session I am presenting at. So laptop it is for the 2.5 hour flight (okay I did get a 30 minute nap in too but really a tired Sandra is no fun for anyone and its only 11 AM CET).

Get through customs in record time and off to the hotel. The United States is awake and has had its coffee so by blackberry is buzzing with new emails all seemingly asking me to review something or for my opinion or insight. I answer the quick ones in the taxi and of course delete the junk – rule 1 of staying productive on the road is eliminate as much noise and junk mail as possible so you don’t lose important things in the mess.
Check into the hotel and get my handy little free WiFi access code, good for 24 hours, or so the card says. CONNECTIVITY TIME! Into the room and set up the laptop, charge the blackberry and iPhone and freshen up a bit before getting down to business. Hotel broadband isn’t the fastest but it will do and allows me to finally send out the work I did on the plane rides over. Also take the time to check my schedule for the rest of the day and a big employee productivity booster jumps out at me as I notice that most of my calls are scheduled for the afternoon, East Coast time, which means evening for the girl in northern Europe. All the calls are for some very cool upcoming research from Yankee Group so don’t really want to miss them so late night calls it is for me besides, working late will mean less work to catch up on later and that is a good thing.

After a quick dinner and a nice walk to clear my jet-lagged brain, time for some calls. Free Wifi means the most cost effective way of doing these is Skype or my softphone. First call is a Yankee Group bridgeline so softphone it is. Broadband quality leaves a bit to be desired in terms of the voice quality this is likely compounded by forgetting my really good headset so we make do. Calls go well and I get a lot done. Being productive on the road is a piece of cake with the right tools and resources. Although it is now midnight local time and I have to be up in 6 hours to present to a room full of communications sales executives.

Day 2 in Europe and blackberry, iPhone and I go off to have breakfast. Nothing major has happened in the last 6 hours and I check my voicemail but can’t return any calls due to the time difference. Good time to break out the e-reader and get a few minutes of down time in while my coffee kicks in. Have a great day of meetings and a really interactive presentation with a client at their offices and now two hours to kill till dinner so back to the hotel and my free WiFi. Except even though I still have time left on the WiFi clock it isn’t working because I sent and received to many files. Okay that’s a little bit of a hiccup but no worries, back down to the front desk for another WiFi access card and ready for the next round of work and conference calls. By the time I leave for my next stop, London, I have maxed out my hotel WiFi account 3 times. Not really meant for the high volume worker I guess.

Next stop, day 3, London. At least here I will be working out of the Yankee Group’s London offices which means real high quality Internet and phone service. Now is the time to buckle down then and take advantage of the resources to pump out as much work as possible, in between service provider meetings around London. All in all, London was a productive stop as a mobile worker. Only hiccup here was missing a complete BBM message from a colleague also in London who missed out on having a lovely Thai dinner with us. Sadly that is only to be blamed on user error (me) for multi-tasking and actually getting absorbed into my live conversation and not paying close enough attention to the BBM messages. I now owe my co-worker a pint or two at the local pub to make it up to him or will have to hear about it for days to come by all in all still a productive and good day.

End of day 4 means another trip to the airport for another flight to another country. Rome is the next stop and this stop is a whirlwind. Arrive at the hotel very late so back to just corresponding with people via mobile phone and blackberry. Having two different devices helps out now because two devices means double the battery life and after a full day of meetings and calls in London and then a late flight and taxi ride in Rome laptop battery life is the roadblock of the day. The batter life drama leads to the next discovery of my hotel, limited outlets. I always travel with plenty of plug adapters in Europe but don’t have that many outlets to choose from so do the best I can to get all devices charged up before my last full work day in Europe begins and maximizing the dell battery life of all devices – laptop, blackberry, iPhone – is going to be critical.
Day 5 is back to back to back meetings all over Rome but all goes well and thanks to good battery management make it back to my hotel at the end of the day with enough juice left in at least one mobile device to head out to dinner without being totally cut off from the world. Time to enjoy one last night in Europe before the trip home.

It’s that last trans-Atlantic flight that really has me longing for WiFi on this plane. After 3 movies, 2 magazines and a finishing up a book I still have 2.5 hours to go thanks to heavy headwinds and I am running out of things to entertain me. This would be the perfect time to really get some work done or at least be able to surf the Internet but alas no connectivity means access to limited resources. Guess I will see what others movies I can find to entertain me.

So after that European adventure, what are the big mobile worker discoveries for this analyst? Connectivity really is king. Good and productive days were those when I had access to the decent quality and bandwidth connectivity for all of my devices and the most frustrating days and times were when I had limited or none (plane rides). Battery life / power was also my best friend or worst enemy depending on the day and location. So while many people may long for a single device, having at least two devices (and in my case more than that) with me allowed for much more flexibility because when one device ran out of juice I still had options. As for overall productivity, I certainly managed to be very productive despite being away from my primary office location but I may have over done it by regularly working both European business hours and US business hours because I arrived back in the States exhausted and fighting a cold. So the real takeaway is with the right tools and resources and a desire to actually be productive, working from the road – even an ever changing location – can actually make for a very productive work week!

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2011年2月13日星期日

AzureWave to unveil lineup of high-performance 3G products and world-recognized Android software development for evolving mobile Internet market at 2011 MWC

AzureWave Technologies, a leading wireless module supplier, will make its appearance at the Mobile World Congress (MWC) this year, to debut its lineup of 3G products and sophisticated Android software development achievements for the promising mobile Internet.

AzureWave possesses strong relationship with major chip vendors in the world and has proven capability in integrating different chips and packaging multiple ICs into one single small module for mobile and embedded devices. The company's low power consumption design can also extend the mobile device's battery life without sacrificing performance.

The advantage of such a business model is that AzureWave is capable of providing a module IC with the strongest combination available on the market, offering the best possible, cost-effective, customizable, and time-to-market solutions to its clients.
Attending the MWC show for the third consecutive year, what is more noticeable is that AzureWave will be showcasing for the first time its fresh new 3G products designed for the mobile Internet device market.

Catering to the global booming mobile market where numerous smart devices such as tablets and smartphones are being introduced since late 2010, plus the inevitable rising demand for faster speed in data communication, AzureWave is taking the advantage of its strong expertise in wireless technologies integration, to build a brand-new 3G product line for enabling a true wireless mobility experience.

AzureWave is showcasing at the MWC its complete series of 3G products including a uniquely-designed, micro-sized 3.5G HSPA dongle router and the world's smallest 3.5G HSPA tri-band mobile router, enabling high speed wireless Internet access from virtually anywhere with any WiFi-enabled device. Aside from the innovative router products, AzureWave has utilized its core competence in wireless technologies integration as well as module manufacturing capability, to introduce at the same time the 3.5G mini-card module for embedded laptops and tablets. AzureWave has readied its 3G products for WCDMA and CDMA2000 networking systems, offering blazing fast download speed at up to 21Mbps peak rate.

At MWC 2011, the company will also showcase its latest four-in-one wireless module IC, which integrates Wi-Fi, Bluetooth, FM and GPS capabilities into one SiP (system-in-package) module. The highly integrated module IC, with low power consumption and complete software support, will allow users of any mobile and smart device to have an expandable and rich wireless experience.

In addition to designing and manufacturing module ICs, AzureWave has also been working on software development ever since it was founded. It has already been transformed into a DMSS (design, manufacturing and software supporting service) provider that provides its clients with complete and customized software services.
AzureWave has strong R&D resource devoted to software development that enables the company's module ICs to support all available operating systems on the market including Android, Windows Mobile, Linux and others. The company even sponsored an open platform development team "0xlab" which concentrates on bringing together the Android's open software and hardware industrial design.

The main objective for 0xlab is to assist Taiwanese design and manufacture industries to understand and efficiently utilize the open platform like Android, therefore reducing the period of research and development, and bring the best and competitive products to the market.

0xlab is excellent in hardware/software integration, and is dedicated to provide turn-key solution for mid/entry-level Android-based phones by adjusting related firmware, porting drivers and ensuring best performance turning. The team is also capable of designing value-added services such as customized user interfaces (UI) for clients as well as providing assistance concerning software. The impressive contribution from the team has been recognized in the open source world as "Top 10 contributors to Android" - ranking committed since Froyo (Android 2.2) release - making its sponsor AzureWave more competitive over its rivals on software development.

As for the wireless entertainment/computing sector, AzureWave also has several new products and technologies, such as wireless modules that support 802.11ac and 802.11ad standards. For the 802.11ac/ad wireless modules, AzureWave has recently teamed up with Israel company Wilocity to develop Pre-WiGig solution that supports 60GHz frequency band, which features data transmission rate of up to 7Gbit/s, over 10 times faster than the highest 802.11n Wi-Fi. The company believes such technologies will start taking off later this year or in 2012 as demand for wireless entertainment picks up.

AzureWave has also been working aggressively for wireless display (WiDi-like) technology, which allows HD media transmission from PC/NB or game consoles to HDTV wirelessly. The company is already in cooperation with several TV brand vendors for them to integrate AzureWave's wireless products into their latest TV products. AzureWave is also working on new technology to allow wireless media transmission between smartphones and TVs and the technology is expected to be a focus at the MWC 2011 show.

After several years of hard work, the company has successfully cut into the supply chain of Top-5 smartphone brand vendors and the company is currently shipping its wireless module IC products to most of Taiwan's DMS/EMS providers as well as ODM/OEM players that manufacture smartphones. AzureWave is one of the largest suppliers for the Taiwan market.

In addition to smartphones, AzureWave expects that strong tablet PC shipments from smartphone and PC vendors in 2011 will significantly boost their demand for wireless modules and the company has already started cooperating with several PC-based vendors for their tablet devices.

In the future, the company will continue to focus on its wireless module IC business since the overall wireless connectivity industry is still growing rapidly. And with most of the consumer electronics products set to be providing wireless connectivity, AzureWave believes the business will continue to contribute strong growth to the company in the next 3-5 years.