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April 28, 2017

Sony VGP-BPS5A laptop battery

Workstations are among the most powerful laptops, but as mentioned above, they are designed to run professional applications rather than games. The obvious ones to consider are the Lenovo ThinkPad W540 â€“ since you are already a ThinkPad owner â€“ and the Dell Precision M3800.The ThinkPad W540 looks like a T-range laptop but includes high-spec components. The standard model has a Core i7-4700MQ but there is a choice of five chips, up to the 3.9GHz i7-4930MX (for £1,069.86 extra). Memory starts at 4GB but can be expanded to 32GB for an extra £364.80. The graphics card is an Nvidia Quadro K1100M or K2100M. As with the T440, the hard drive options include a 1TB drive with a 16GB micro hard drive. However, you can combine a 1TB hard drive with a 256GB or 512GB SSD, which is probably ideal. You can also upgrade the 1920 x 1080-pixel FHD screen to a 3K (2880 x 1620) IPS screen for a very reasonable £90.18.The stated weight is 2.5kg, but your spec may weigh more.

Lenovo quotes a battery life of up to six hours for the standard 6-cell battery, so you might get up to nine hours from nine cells. W540 prices start at £1,353.99, but a 32GB system with a 3K screen, top spec HD/SSD combination and built-in 3G costs almost £2,500.The Dell Precision M3800 Workstation is an impressive attempt to pack workstation power into something that looks like an Ultrabook. It's only 18mm thick, and the starting weight is only 1.88kg â€“ very close to the T440's 1.8kg. The drawback is that once you have chosen the top model, that's it. You get a Core i7-4702HQ processor, 16GB of memory, Nvidia Quadro K1100M graphics with 2GB of memory, a 256GB SSD, a 15.6in 3200 x 1880-pixel touch screen and Windows 8.1 Pro for £1,962.48 including VAT and shipping. If you really want to downgrade to Windows 7, you'll have to do it yourself.According to the spec, you should be able to add a 500GB or 1TB hard drive to go with the 256GB SSD, but I can't see that option on the UK website.The M3800 looks like a good choice for people who need to edit photos or videos in Adobe Creative Suite or similar software, or do 3D graphics work, but want an ultraportable. However, you don't need workstation graphics for Microsoft Excel or the other tasks you mention.

Many of these children have never touched a computer of any kind before; most, indeed, have never seen one. But when these introductory classes are finished, the children will be allowed to take these laptops to their homes, many of which have no television or phone connections. Or even electricity.The class concludes. Freed from the requirement to sit , the children are all suddenly on their feet handling the computers in the way that seems most natural to them; standing and propping them on chests or stomachs. Prodding with a single hand. Not wanting to give them up.They laugh and film each other with the laptop cameras or gather in small groups in the dusty yard outside to watch each other playing games. Others crowd around the largely American instructors to bombard them with questions.I see the same scene in several schools. When I talk to them, the Rwandan children are as shy as children anywhere when addressed by a strange adult. When they do answer it is with a kind of quiet wonder. I love using it, says Oliver Niyomwungeri, aged 12. I never saw one of these before. I'm so excited to take it home when we're allowed. I want to do my homework on it. And I want to teach my younger sister how to use it.These laptops, the first of 100,000 that the government intends should be given to every Rwandan child between the ages of nine and 12, represent a kind of revolution.

One that envisages not only the transformation of an impoverished agrarian society into one of the most advanced in Africa, but also sees technology as a tool that will help exorcise the country's lingering ghosts. The genocide that took place in this country in 1994 deprived many of these children of uncles, aunts, grandparents. During 100 days of killing, 800,000 minority ethnic Tutsis and moderate Hutus were murdered in service of so-called Hutu Power.I examine the computer closely the next day. It is being turned over in the large hands of David Cavallo in a coffee shop in a modern mall in Kigali. Cavallo is project director and learning architect for One Laptop Per Child; the organisation that developed and supplies the computers. He is an enthusiastic and youthful 58, with a tangled mop of salt-and-pepper hair, a boxer's nose and grizzled beard.Rwanda is not the first country to have been supplied with the XO machines by One Laptop Per Child (1.4 million have been delivered to children in 35 countries including Haiti, Afghanistan, Brazil and Uruguay), but it does present one of the most challenging projects that the organisation has yet undertaken. For Cavallo, it is also one of the most exciting.The organisation's mission statement â€“ to create educational opportunities for the world's poorest children via a rugged low-cost, low-power laptop â€“ might have had Rwanda specifically in mind. Its shortages of electricity and lower internet connectivity are driving One Laptop Per Child to develop ever cheaper and tougher machines with ever lower power consumption. The next generation of computers will be usable even where there is no mains power at all. And at the heart of their programme is the idea of joyful, playful and innovatory learning.Over the past 10 years technology has helped other very poor societies â€“ via the wind-up light or through the widespread adoption in Africa, in particular, of mobile phones, even in the remotest communities â€“ but this project is of a different order.

One specific aim is to encourage social cohesion. The Rwandan government particularly wants to encourage rapid economic development by educating these children to be computer-literate â€“ but there is also a notion that these laptops might help to vaccinate a society still in painful recovery from its genocidal past by opening up the rest of the world to a new generation.Cavallo talks about Jean Piaget, the Swiss psychologist and philosopher who believed education to be capable of saving our societies from possible [violent] collapse. He also talks of the American philosopher John Dewey, one of his heroes, who believed that only science could reliably further human good. It is an ex-student of Piaget's, Seymour Papert (a brilliant mathematician and education and technology theorist) who is the inspiration for the XO. A political refugee from apartheid South Africa, Papert fled to England, France and finally America where he became one of the founders of the Artificial Intelligence Laboratory at the famous Massachusetts Institute of Technology in Boston (MIT).Later Cavallo emails me a photograph. It is a black and white image from 1967. A long-haired and bearded Papert is bending over a mechanical clear plastic turtle controlled by a computer language written for children of his own devising.

This turtle, which children could command to draw â€“ on paper at first and later on a video screen â€“ was the first of Papert's Children's Machines that four decades later would morph into the XO.What Papert has long argued is that children, in all societies, can master computing, not just their simple operation but also the writing of computer code as well. That learning process, he believed, equipped children not only for understanding computers but could transform entirely how individuals learn throughout their lives, inside and outside the classroom and, therefore, alter societies. He is a longstanding enemy of what he sees as the tyranny of formal education systems which he believes equip children only to master set syllabuses. Put simply, Papert believes that computers can enable children to learn how to learn for themselves through playful problem-solving and that this will lead to their becoming better-rounded human beings.One of those inspired by what Papert had to say was Nicholas Negroponte â€“ brother of John, George Bush's controversial director of national intelligence â€“ a student and later colleague of Papert at MIT, who would become the founder and driving force behind One Laptop Per Child.

Although he is a wealthy pioneer in the field of computer-aided design, an investor in technological start-ups and sometime predictor of the future through his writings on the benefits of technology to humankind, it has, however, been One Laptop Per Child that has become Negroponte's most ambitious project. He is taking Papert's ideas and making them reality, applying himself to his dream of what has been referred to as techno-utopianism â€“ the belief that science and technology can bring about profound beneficial social change.Indeed in a lecture by Negroponte from 2006, describing his vision for One Laptop Per Child, he declared that education, delivered in the context of the XO, is potentially the solution to [the problems of] poverty, peace and the environment.David Cavallo, a former student of Papert and a colleague of Negroponte, has taken a leave of absence from MIT to crisscross the globe with the XO, introducing it to the world's most impoverished children. The son of an Italian anarchist who fled his home in the second world war, his own journey to Rwanda from Ohio, where he grew up, has been guided by a similar radicalism to his father's, one that saw him drawn as a student to the University of California's Berkeley campus, attracted by its history of protest. But anger, says Cavallo, was not enough.

What he wanted were practical solutions that changed the world, not rhetoric that simply described how bad it was. It was a need that would lead him eventually to be part of One Laptop and to settle with his family in Kigali.He hands me one of the computers. A little larger than a box of chocolates, it is one of the first 100,000 XOs destined for distribution around the country by a government that has bought them at a cost of $181 each. The next generation will be a plastic-coated tablet. Indestructible, it is hoped. Costing less than $100.The keyboard is small for my fingers but it was never intended for an adult. The desktop appears as an unfamiliar cartwheel of programmes represented by child-friendly icons. Cavallo flips it over, converting it at once into a games console.In a landlocked and resource-poor country, you can appreciate why the laptop represents one of the most potent symbols of Rwanda's ambition to turn itself into a knowledge-based economy. The government hopes to train 50,000 computer programmers within the next decade, a scheme that is being developed in parallel with other large technology projects whose aim is not to catch up with neighbours such as Kenya, but to leapfrog them within a generation. A wireless broadband system is planned for Kigali â€“ a city-wide umbrella that would convert the capital into a huge hot spot.

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