Eerste verkenning van het nummer Ain’t no sunshine van Bill Withers
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May 5, 2011 – 8:29 am
Why All Your Bulbs May Soon Be LEDs
March 11, 2011 – 8:40 am
Why All Your Bulbs May Soon Be LEDs: “
A breakthrough in producing light emitting diodes could bring LED production costs down as much as 75%.
A breakthrough in producing light emitting diodes could see LED production costs tumble as much as 75%. That’s thanks to research by a startup called Bridgelux, which has resulted
in a radical shift–Gallium-nitride LEDs can now be grown on
silicon substrates for the first time in a ‘commercial grade.’
The tech
leverages the huge, ultra precise and far cheaper silicon wafers that
are used in silicon chip manufacture instead of the smaller, more
expensive sapphire ones. The breakthrough has been to successfully grow white LEDs
on a silicon substrate to create devices that produce 135 lumens per
watt of electrical power–well above what typical CFL bulbs can offer,
and around 10 times better than old incandescent bulbs.
So how big a deal is this? Pretty darn big. After all, did you know that those tiny flickering LED lights that sprinkle the power buttons of pretty much every device you own often need sapphires as part of their production?
Sapphire is key to producing white LEDs. It’s artificially grown, rather than being dug up from the rock, but it’s pretty much the same as the precious gem material you’re probably thinking of–meaning it’s rather expensive. Slabs of crystalline sapphire about four inches in size act as a substrate during LED production: The complex layered recipe of semiconductor chemicals that actually make up the LED devices is ‘grown’ in various process on the precise surface of the sapphire, and then cleaved from it at the end before being chopped up and packed into the more familiar dome-shaped LED unit.
But sapphire is part of the main problem facing wider adoption of LED lighting–it makes the cost of high-brightness white LED light bulbs prohibitive compared to compact fluorescent bulbs, and many times more expensive than incandescent bulbs: $40 is a pretty common price bracket for LED bulbs that put out the equivalent light of a 60-cent 60W incandescent unit. Yet many people desire the LED tech very much because the bulbs can have an incredibly long life span, measured in tens of thousands of hours, and they consume much less electricity than their older equivalents.
Now Bridgelux thinks that after the two to three years needed to ramp its new tech up to production scale, the cost of producing LEDs will drop by three-fourths. Ten times greater electrical efficiency, ten times the lifespan of old bulbs and a much more affordable cost? Yup–soon every light you encounter may be an LED one.
To read more news like this, follow Fast Company on Twitter: Click here.
“
(Via Fast Company.)
I quit
May 28, 2010 – 7:54 pm
Last wednesday was my last day as lead singer from Zabatista. I’m no longer part of the band. It has nothing to do with the other guys in the band, they are all really nice guys which are all very talented. As Zabatista we have played together for 5 to 6 years which is a pretty long time. Before Zabatista we have played in the band Vurio for a couple of years.
We’ve had lots of fun rehearsing and performing on various occasions.
I had to quit because I wasn’t enjoying it anymore and it put a huge amount of stress on me.
This decision has taken me quite some time but now I decided to follow through.
So now the band will be on a search for a new lead vocalist. So if you’re into rock music and live in the Netherlands and want to rehearse in the Utrecht regio then please consider the band Zabatista and go check out their site. If you’re into songwriting and want to have a considerable amount of input into the songs then don’t hesitate.
For me I will focus on learning to play the guitar and sing along with acoustic sessions just for the fun of it. And hell no, I won’t stop singing. I wish the guys from Zabatista all the best and I will continue to see them because they’re all friends of mine. I just want them to get a real nice new singer.
And as far as the future goes, maybe we’ll perform again together sometime on a stage somewhere.
Kind regards,
Jöran
My music
April 27, 2010 – 10:22 am
I recorded some music on different occasions. You will find them here! More songs will be added later
The Problem with Passwords
February 10, 2010 – 8:37 am
The Problem with Passwords: “Abandoning password masking as Jakob Nielsen suggests could present serious problems, including undermining a user’s trust by failing to meet a basic expectation. But with design patterns gleaned from offline applications, plus a dash of JavaScript, we can provide feedback and reduce password errors without compromising the basic user experience or losing our visitors’ trust.”
(Via A List Apart.)
