Showing posts with label Science-Tech. Show all posts
Showing posts with label Science-Tech. Show all posts

Wednesday, October 27, 2010

What's greener: A refurbished laptop or a new one?

My last laptop lived till the ripe old age of six, but toward the end of its life, it went downhill fast. It took its sweet time to complete even the simplest of tasks. I developed a nervous tic of saving my blog posts every two or three minutes, since I never knew when my browser would freeze or suddenly quit. And since its battery was only good for about five minutes, my laptop was basically a desktop with a tiny screen. I considered replacing it with a refurbished model, but in the end I was seduced by a brand new laptop that I figured could probably do more tricks than a used one. Besides, I had heard that newer models were actually better for the environment, since they used energy more efficiently than older models.

I'm not the only one who prefers shinily new over gently used. According to a survey by Resource Recycling, a company that publishes industry news for recycling businesses, consumer sales of refurbished electronics have dropped in recent years, since retailers are "flooding the consumer electronics market with new devices that are comparable in price to used goods, but are packed with more features." So are newer computers really a better deal than refurbished models in the long run? And which kind is better for the planet?

Environmentally speaking, refurbished computers are the clear winners. "An astonishing amount of resources go into making these products," says Barbara Kyle, the national coordinator of the Electronics TakeBack Coalition. According to a 2003 UN study (pdf), the manufacture of one desktop computer requires 48 pounds of chemicals, 1.7 tons of water, and 529 pounds of fossil fuels—about 10 times the weight of the computer itself. (By comparison, new refrigerators and cars require roughly their own weight in fossil fuels.) "The more we can reuse old products, the fewer new resources need to be extracted," says Kyle. And the less we add to the world's pile of e-waste, which is giant and growing bigger every day.

What's more, even though newer computers use energy more efficiently than older models, it's not the energy use by the consumer that's the main problem. A 2004 UN study (pdf) found that about four-fifths of the total energy consumed over a desktop computer's lifetime is used during production of the computer—and only one-fifth was consumed during its use.

Buying a refurbished computer also makes financial sense. Though prices of professionally refurbished computers vary widely depending on hardware age, software packages, and warranties, you can often find deals for as little as half the price of a brand new machine, and in many cases refurbished models will last just as long as new ones, says Willie Cade, the CEO of PC Rebuilders and Recyclers, a computer refurbishing company. (For specifics on various brands and price comparisons, check out this excellent Gizmodo post on the topic.) Cade and his team recently outfitted desktop PCs from 2001 with the latest software, then had college students use both the refurbished computers and brand new ones in a blind test (the monitors were identical). Thirty-six percent of the students couldn't tell the difference between the old computers and the new.

If you do choose a new computer, you can extend its life by cleaning up its software when it starts to get slow. People keep their new computers for an average of 2.5 years, but the majority of them can last a whole lot longer if you upgrade the software. "People often think computers slow down after a year or two," says Cade. "But that's usually a problem with the software—either there's too much of it or it's not working efficiently. If you refresh or clean up the software, it will usually get quicker." According to Cade, as a general rule of thumb, if you refresh your computer's software after its second birthday (which will usually run you a few hundred bucks), you can extend its life for three years if it's a laptop, and five or six if it's a desktop.

What you should look for if you're buying a refurbished computer: Make sure the software is legally licensed and genuine—that way you'll be able to get the necessary updates. Ideally, your refurbished laptop should come with a three-year warranty and a tech help phone number. "Someone that says 30 days—run away," says Cade. Make sure your refurbisher is registered and/or authorized: In the Microsoft world, that means being a member of the Microsoft Refurbisher Program.

If you're getting rid of your old computer, make sure you do it responsibly. Chances are it can be fixed and sold or donated to someone else: The refurbishing company Gazelle.com pays cash for used computers and gadgets. PC Rebuilders and Recyclers will sell your spiffed-up computer to a needy school or organization for about a third of the cost of new. Most manufacturers will take back your used electronics; the recycling information group Earth911 has a good guide to those programs, plus a list of organizations that accept donations of old computers, here. The EPA has more resources here.

Special thanks to the folks at the Story of Stuff Project, who helped me research this post. Can't wait for the new Story of Electronics, out November 9!

This article was written by Kiera Butler.
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Monday, March 22, 2010

The Future Sounds Like This: 10 Magnificently Modern Musical Instruments

The study of musical instruments (‘organology’ – no, really) is the study of the human condition. Every culture is defined by its own distinctive set of trills, whistles, parps, honks and beats, and every corner of the world has evolved its own location-specific indigenous instrument to renew a sense of cultural identity through noisy self-expression. And instruments evolve – never more so than now, in the midst of a technological revolution that has opened up entirely new ways to make music. So settle back and compose yourself as we look at ten new instruments that look set to accompany us into the world of tomorrow.

1. Eigenharp


(Images via: Eigenlabs and engadget)

In development for 8 years with funding of over £10m / $16.5m, the Eigenharp is a slow-crafted technological marvel. 120 keys (each one tilting to give a flexible tone), percussion buttons, built-in sound management capabilities including recording, playback and looping, and a potentially limitless range of noises thanks to running on uploaded digitally sampled sounds. It is played via keyboard, tap-pad and mouthpiece – and the result is an instrument that sounds like a band. [youtube:http://www.youtube.com/watch?v=zcVqJh0qEMc 468 310]

2. Electric Violin


(Images via: Wired and Riverstring)

Similarly digitally enhanced are the electric violins, a family of new hybrid instruments that are sufficiently well-established to become a mainstay of the modern music scene. Thanks to electrical pickups inside or outside the instrument’s body, the violin’s vibrations are run through electronic processing and transformed into any sound under the sun – most effectively, the noise of an electric guitar. Witness the magic of Ed Alleyne-Johnson performing on the streets of Chester, England. [youtube:http://www.youtube.com/watch?v=vUO6kYLb6As 468 310]

3. Tenori-On


(Image via: Yamaha)

No, this isn’t the first good-to-go version of Minesweeper: this baby is for making beautiful music with. The 16 x 16 grid of LED lights on the Tenori-On responds to touch and to real-time looped programming, creating soaring, rippling compositions that mesmerise beginners and experts alike (Peter Gabriel is a fan). If you want a hands-on demonstration of its power, try Andre Michelle’s ToneMatrix, an online AudioTool-powered simulation. [youtube:http://www.youtube.com/watch?v=_SGwDhKTrwU 468 310]

4. Samchillian


(Images via: Eitan Shefer)

Musical instrument or chest expander? You’d be forgiven for asking – but the Samchillian is a new, ergonomic-minded take on the keyed instrument, with each key representing a relative, not fixed, note. As the musician plays, the function of each part of the instrument is constantly changing, allowing a full range of musical expression (provided the player has a really good memory, of course).

5. BeatBearing


(Images via: BeatBearing)

And moving further into the realm of instruments that look like anything but – we have the BeatBearing. Instead of generating noise itself, the BB triggers the timing of preselected types of percussion – simply drop a steel ball-bearing in the right slot to get the beat you want, when you want. The inventor isn’t interested in manufacturing his design: instead, he has published the plans on DIY-tech online magazine MakeZine to encourage people to build their own - and with more than 1 million views of the Youtube demo (below) at the start of this year, we reckon there will be plenty of takers. [youtube:http://www.youtube.com/watch?v=wreP8FMupyM 468 310]

6. Hapi Drum


(Images via: Wikimedia Commons/OrangeHat)

At least the Hapi looks like what it is (well, kinda) – a steel drum with a hole in the base that allows the player to control the amount of noise emerging, using their lap. Since each key (or “tongue”) is part of the main body of the instrument, each note is accompanied by a subtle resonant harmony from other musically compatible notes. Time for a demonstration, methinks…
[youtube:http://www.youtube.com/watch?v=PW-GZ05htLE 468 310]

7. Electroencephalophone


(Images via: Glogger/Wikimedia Commons)

At first sight, you’re looking at a lady trying to listen to her iPod underwater, and a collection of buff young people stood up in a hot-tub. In fact in both pictures depict music-making, via an electroencephalophone – a device that converts brainwaves into sound (and therefore a quintephone). The lady is psychotherapist Ariel Garten participating in a concert performance – and the “hot-tub” trio are an electroencephalophonist and two assistants accompanying on electrocardiophones.

8. Hydraulophone


(Images via: wearcam)

Now to the merry, messy world of the hydraulophones. Water flows out holes in the instrument, and the player uses his fingers to block or divert each stream, triggering internal mechanisms – discs, shafts or valves – that produce sound. In other words, it works like a woodwind instrument, except the wind is replaced by water (which doesn’t directly create the sound).
[youtube:http://www.youtube.com/watch?v=tnJb9WyhCUc 468 310]

9. Drawdio


(Images via: Jay Silver via Wired)

Daring you to not burst out laughing when it gets underway is the Drawdio, a homespun theramin. There are a number of ways to make one (cheaply and easily), but the working principle remains the same in all models – it runs a current through the graphite deposited from the end of your pencil (or any other appropriate medium, including yourself), and translates it through a synthesizer to create a noise like a kazoo in a gale. [youtube:http://www.youtube.com/watch?v=PV_w38ldZaE 468 310]

10. Ocarina


(Images via: Smule)

But for breadth of lateral thinking, hats off to Smule, the inventors of the Ocarina iPhone application. Using the phone’s built-in movement sensors and touch screen, your phone becomes either a wholly keyed instrument…or a kind of flute, by detecting the passage of your blown breath and translating it into intensity of sound. Via: weburbanist
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Thursday, March 18, 2010

Scientists create hydrogen fuel from sound waves



Scientists at the University of Wisconsin-Madison have succeeded in producing hydrogen from zinc oxide crystals and water. They immersed zinc oxide crystals in water and could harvest hydrogen from vibrations caused by passing traffic and waves. This mechanism is called the piezoelectrochemical effect.



When placed in water, the novel zinc oxide crystals react to sound-generated vibrations and develop areas with strong positive and negative charges. Later, the surrounding water molecules break up and produce hydrogen and oxygen. During this process, 18 percent of the energy from vibrations is converted into hydrogen gas. That’s really impressive when compared to 10 percent of the same coming from conventional piezoelectric materials. The research could someday enable scientists to generate green energy from sound waves at airports, oceans and from autos. Via Inhabitat | Greendiary
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Tuesday, February 16, 2010

France's Areva Buys 100% Stake in Solar Thermal Startup Ausra

Playing with the Big Boys

The solar thermal startup Ausra, which we've written about in the past, has just been bought by the French public mega-conglomerate Areva for an unknown amount. Ausra's solar technology is particularly desirable because they are storing part of the heat generated by the sun during the day so that they can keep producing electricity even when the sun doesn't shine.



I see this as a good sign for the capital-intensive solar thermal market. Projections have it growing at around 20% per year for the next decade, but depending on a few things (price of oil, carbon taxes, major climate events, new scientific discoveries, etc), solar could potentially expand even faster than that (or slower, if we're unlucky).



Areva is huge and has the muscle to make really big solar projects happen. This kind of concentrating solar thermal with storage needs to be proven reliable before other companies and governments will invest more in it. And if it doesn't work, the faster we know about it, the faster we can solve the problems or move on to something else. Now's the time to make it happen, Areva. Via: Ausra
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Sunday, February 14, 2010

16 of the World’s Wildest Wind Power Designs



When someone says ‘wind power’ most people probably think of giant high-cost three-bladed wind turbines generating massive amounts of power on a distant hilltop – but harnessing energy from the wind can be much more diverse and exciting in its forms and applications than simple wind turbine farms would lead one to believe. From sleek wind powered vehicles and clever home wind power generators to airborne floating turbines and nano-vent skins, wind power innovation is virtually limitless.

How about a smooth and silent wind turbine that could generate enough power for your entire house just by sitting quietly in the corner of your back yard? Or a land vehicle capable of outracing your conventionally powered car – all with wind energy? A way to charge your cellular phone without an outlet just using gusts and breezes? A skyscraper where the floors rotate independently at the whims of the wind? This gallery explores some of the most interesting cutting-edge applications of wind power in contemporary design.

















Source: webecoist
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