Laptop Repair Made Easy
In 2007, the Texas House passed House Bill 2714, the Electronic Waste Recycling Act, which requires computer manufacturers that sell in Texas to offer consumers free and convenient recycling of the computers sold in the state. The act defines computer equipment as desktop and laptop computers, monitors (display devices without a tuner), and the accompanying keyboard and mouse made by the same manufacturer.
Some processors use a lot more juice than others. Do you really need all that speed and power Probably not, although computers have now taken over the role that big muscle cars used to play for macho hard guys. Laptop computers use a lot less power than desktops, so if you can, opt for a laptop.
In early 2008, Johnson Controls opened what it claims is the world 's first factory dedicated exclusively to manufacturing lithium-ion batteries for electric and hybrid vehicles. Japanese electronics giants like Sanyo and Sony, which currently dominate the market for laptop and cell phone batteries, are gearing up for hybrids. And a slew of new American companies such as A123 Systems and Valence Technology are hoping to leapfrog established battery makers with superior technology. Right now the market is fluid, to put it mildly, since in early 2008 it was still not proven that any lithium-ion battery would work in plug-in hybrids. The story is the same (though a little less frenetic) with the other new energy storage solutions A range of companies are introducing products aimed at one or more of these markets, and buyers of storage tech are evaluating them.
When pupils write for us as a 'teacher-as-examiner' they will wonder if they 'have got it right'. It is therefore important to consider alternative audiences for their writing (Sutton 1992, chapter 10). For example, they could write for a newspaper, their younger brother, the class that follows or a web page, giving them confidence to write what they really understand and believe. This may, of course, contain misconceptions - so creative writing is a good elicitation technique too - but it is better that they expose their misconceptions early than produce writing that isn't theirs and that they don't understand. Pupils may need two notebooks, one for drafting and another for finished work. For those with a laptop the drafting can be done straight onto the computer, but it is worth asking them to save their first drafts for the teacher to see. This provides evidence that it is their work (and not plagiarised), and it is encouraging for the pupils to see the progress they made from...
There are practical hurdles to overcome as well. Be aware of faulty equipment that is set out for you (check it as the technician brings it in if you can), or of circuit boards with flat batteries (ask the technician to supply a box of replacements). There are many hiccups that are harder to solve but you can prepare for them if the projector isn't recognising your laptop or the wireless network is down, have a set of worksheets or books in reserve.
For instance, although reducing server power draws and minimizing PC power usage seem obvious, you might decide to implement a plan where lighting automatically turns off. You could get as small as directing laptop and cellular phone users to disconnect their chargers from the wall when they're not using them. Although there's no device plugged into the charger, the charger still sips at the electrical current.
There are a few other solid pure plays in the fuel cell sector, each with varying specialties. Medis Technologies (Nasdaq MDTL) makes microfuel cells for portable consumer electronics market. Its 24 7 Power Pack product is a disposable power source capable of providing direct power or multiple recharges to portable electronic devices such as mobile handsets, smart phones, MP3 players, and other handheld electronic devices. The company also develops fuel cells for laptop computers as well as stationary fuel cells for small-scale emergency backup power.
In recent years, oil markets have been among the most distorted and flawed in the world. Oil prices have little relationship to cost. Retail fuel prices are determined mostly by politics, with taxes guided by government budgets. Rising world oil prices take a long time to dampen oil consumption, inspiring only modest investment in oil production and motivating a lot of talk about alternative fuels but little investment. The market is so distorted and unpredictable that even the oil companies are befuddled. ExxonMobil CEO Rex Tillerson quips, If I knew what the price of oil would be , I'd be living on a Caribbean island with my flip-flops and a laptop, working just two hours a day. 45
Supplies that are more efficient and using components that require less power. Apple claims that it has reduced the off-mode power consumption of its portable computer power adapters by 82 when the computer is not in operation. Also, many Apple products have an automatic shut-off feature to conserve energy, and the Mac OS X operating system has an Energy Saver feature that allows consumers to manage the power consumption of their computers. All of Apple's products ship with power management measures enabled by default. Since 2001, Apple computers, laptops, and displays have earned the ENERGY STAR rating.
Tamsen Butler was living the busy life of a mother of two, a college student, and a freelance writer when her 15-month-old son could no longer breathe properly. She carried him into the ambulance, clutching my son in one arm while I used my other arm to balance my laptop bag. After a couple of nights in a Nebraska hospital tending to her son and staying up late trying to meet writing deadlines, she had an epiphany My son was in the hospital and I was a fool. Rather than working while her son slept, Butler realized she should have been resting. Rather than clutching my son with only one arm I should have had both arms wrapped around him. When her son recovered, Butler and herfamily began spending less time rushing from here to there and reorganized their lives around their health and their time together. They also gave to charity the many extra toys and clothes they had accumulated.1
The 100 laptop One Laptop per Child was set up by faculty members at the Massachusetts Institute of Technology (MIT) Media Lab to create the 100 laptop. Their goal was to provide personal computer access to children all over the world, particularly to children in developing countries with poor infrastructure or a lack of reliable electricity. The laptops are wireless, and were powered by a hand crank (the hand crank caused concerns about stresses on the casing and ease of use, so now they are powered by bicycle instead). The social impact of the laptop is substantial, as it has the potential to serve the nearly two billion children in the developing world who are inadequately educated or receive no education at all. The laptop is also available for children (or adults) in the developed world. But because the computer is manually powered, there is a direct correlation between the effort required to power it and the power it needs, optimizing efficiency. There are many other electronics...
There are rechargeable batteries with better energy storage capability than the lead acid battery used in automobiles. Nickel-cadmium batteries used in portable, rechargeable power tools store 2 or 3 times more energy than lead acid batteries on a weight basis, but are far more expensive. Like lead-acid batteries nickel-cadmium batteries present a disposal problem. Like lead, cadmium is toxic and must be recycled. Nickel-hydrogen batteries are used on some spacecraft. Recently Toyota introduced a hybrid automobile that uses a nickel-hydrogen battery. Nickel-hydrogen and a type of rechargeable lithium battery are finding use in powering laptop computers and cell phones.
The most intriguing new innovation being tested in this building, however, is the concept of shared working spaces. It is estimated that in any given day, about 50 percent of the space in a conventional office space goes unused (e.g., because of travel, illness, vacations, or pregnancy). The design of the Haarlem building begins from this premise and aims to reduce the space needed by 25 percent, through a shared workspace arrangement. About half of the employees of the government building agency housed in these offices operate under this shared workspace arrangement. Instead of having a permanent office assigned to them, employees arrive each morning and collect a rollable cart (which contains their personal belongings, files, and their laptop computer) and then simply select an open office, which they can use for the day. At the end of the day, they collect their belongings, roll their (locked) cart back to its stall for the evening, and leave. When employees begin in the morning,...
Alkaline batteries sandwich an alkaline electrolyte between electrodes of zinc and manganese oxide. They' re cheap but not especially powerful and can't be recharged. But they're adequate for toys and flashlights, which until recently accounted for the bulk of the mobile device market. With no reason to pack more power into a smaller space, little research was directed at small, powerful batteries. Then along came the laptop and cell phone, and suddenly the consumer products industry developed a burning, multibillion-dollar This brings us to a battery technology called lithium-ion (Li-ion), with electrodes of lightweight lithium and carbon. Currently the battery of choice for laptops and cell phones, its power-to-weight ratio is better than NiCd and five times that of a conventional lead acid battery. It holds a charge longer and can be recharged more often. As you ' ll recall from the previous chapter, next-generation plug-in hybrids and electric vehicle makers hope to use such...
Powerful desk- and laptop computers and computer network technology have made it possible for a significant and increasing fraction of the total white-collar workforce to work at home or in other locations outside conventional workplaces. Interest in telecommuting as a possible means of conserving energy and saving transportation costs was sparked by the oil crisis of the early 1970s (Nilles, Carlson, Gray, & Hanneman, 1976a, 1976b). Like teleconferencing, telecommuting has the advantage, from an environmental point of view, of significantly decreasing the need for travel. In theory, at least,
Finally, advancing technology is prompting another look at electric cars. Wind- and solar-generated power is becoming more efficient, while many are taking a second look at nuclear reactors as a possible source of cheap power. Pure electric vehicles are waiting for a breakthrough in battery technology to improve their viability, and even though we haven't got there yet, new developments in battery tech are promising, as long as this laptop doesn't catch on fire
It's easy to power something that just sits there. You plug it in and turn it on, without much regard for the size or weight of the energy source. But if the device you're powering moves around, like a cell phone, laptop, or car, it has to carry its energy along for the ride. Size and weight matter, and all else being equal, the best mobile energy storage technology is the one with the highest energy density (i.e., the ability to pack the most power into the smallest, lightest form). This concept explains the dominance of the internal
Radios consume power for both transmitting and receiving. Most laptop adapters use their radios, even if they're not connected to an access point (AP). Let's talk about how you can minimize excessive power output from these devices. In addition to the radio overhead, the downside of a lot of broadcast beacon packets is that with some wireless adapters, the computer must come out of power-saving idle states to process the packets. For laptops that are close to the AP, you may be able to save a little bit of power by going into the administrative page of the AP and increasing the beacon interval. The access point is constantly transmitting beacon packets so the laptops know it is available. Laptops Laptops
Although my office is usually pleasant, sometimes the accommodations are not very practical. In the summer the insects can be a nuisance, and often, quite literally, I get a bug in my laptop computer. In the winter it can be bitterly cold, and with the return of warmer weather, the melted snow and spring rains conspire to submerge my rock. Despite the difficulties of accessing my office in the spring, the raised water level does have its advantages. The sound of the rushing water at that time of year is sufficient to drown out the jarring noises from the trucks and cars on the nearby scenic highway. And I can view a different array of creatures and life stages that comprise the river's life system each spring. Even in the summer and fall, when I utilize the office the most, there is really no room for my files and books. Like many people, I need a lot of space for the tools of my trade, but at this office my needs must be met by what is in my laptop computer or in my head. Moreover,...
Fuel-cell technology has the potential to revolutionize electricity generation. First, they'll replace batteries, which are very expensive for the small amount of power they deliver. Methanol is likely to be the fuel of choice as a source of hydrogen. Toshiba plans to sell a laptop computer powered by a fuel cell soon. Within a few years, fuel cells will provide heat
Traditional batteries are limited by the finite amount of electrolyte they contain. That - okay for a laptop or even a plug-in hybrid because they're mobile and can only carry so much weight. But for a stationary application where weight and space are not so important, it' s possible to create a battery that, instead of enclosing electrodes and electrolytes in a self- contained unit, has external tanks filled with electrolytes that circulate through the system, flowing as needed (hence the name flow battery ). Because the external tanks make it possible to build flow batteries in pretty much any size, they- re a possible solution for large-scale stationary storage. The larger the tanks, the more electricity the battery can store, and recharging is as simple as refilling the tanks. Several types of flow battery will be on the market in 2008, and according to the early reviews, they're cheap to build and easy to manage. One company
An experiment conducted by content hosting provider Ecommerce demonstrates that you do not always need the biggest and most powerful systems to run your applications. Rick Gideon, Ecommerce's VP of Systems Operations, created a server out of laptop components and used it to host some of his customers' Web content. The test server uses a power efficient Intel Centrino chip as opposed to the Xeon chip that is used in his typical production server. Because of limitations inherent in the Apache Linux environment used, no more than approximately 700 users can be supported on a single server - no matter how powerful the server. While the test server maxed out at about 600 users, it used much less power than the standard server (2 3 to 1 amp at 110 volts vs. 2 1 2 to 3 amps) and was 1 3 the cost to operate considering power and cooling requirements ( 3 month vs. 10- 12 month).
I prefer to look at it as brains vs. brawn. The information about a piece of equipment eventually rivals the value of the equipment itself. Already, cell phone providers practically give phones away the money is made in the thousands of calls you make over that phone. Personal computers have gotten progressively less expensive. Today, you can buy an Internet appliance for only a few hundred dollars, and rent most of your applications on line. I know people who have personal digital assistants (combo phone, e-mail, minicomputer) that can carry your PowerPoint presentation to your next meeting and transmit the presentation wirelessly to a projector. You can bet that far fewer business people are going to carry laptop computers with them in the near future. (Forget about the hassles at the airport security line, too.)
Products that use tiny amounts of electrical power, supplied from energy stored in batteries, such as radios, hand-held phones, laptop computers, watches, toys, etc., are commonplace, but as consumers and users will know well, this is a very expensive way to energise electrical gadgets. In fact cost effectively harnessing and storing electrical power remains a major challenge to science, particularly when very large quantities of electrical energy are involved 1 . Current generation and transmission policy means that to all intents and purposes electricity has to be used while it is being generated. When the power station generators cease to spin, for any reason, the grid wires linking them to consumers become 'dead'. In an electricity system based entirely on renewable resources this could happen frequently unless back-up power from alternative sources or from massive storage systems are available. In general, as we have seen in Chap. 3, power or energy flow from a renewable resource...
Is the venerable internal-combustion engine on the way out It's entirely possible, and it' s long overdue. But replace it with what Is there such a thing as a truly green car (Consider, for example, the GM model shown in Fig. 7.6) Fuel cells are widely believed to hold the key to pollution-free motor vehicles and longer-running electric devices. Fuel cells can provide energy for devices as small as a laptop computer, or as large as utility power stations, and just about anything in between, inducing every type of motor vehicle. Just what is this sweeping development that holds promise of repowering our world
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