Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
×

Comment Re:Solar panels made of sand (Score 1) 645

Article mention it is done clean.

Since you don't have the knowledge to know when you are out of your depth, I will help you along. The article (really more like a brochure) you cited only covers the p side (they call it "positive potential electrical charge") and doesn't cover the n side of the p-n junction.
http://www.pbs.org/wgbh/nova/solar/insi-nf.html This is a link where NOVA (the science guys) explain how solar cells work. Notice they mention boron and phosphorus. Phosphorus is typically deposited chemically, using CVD (chemical vapor disposition). I am not an expert in the field, but from what I have been told the phosphorus deposition is not clean.

Furthermore, your link doesn't seem to acknowledge that making a reasonably pure silicon wafer for the solar panels requires forming silicon crystals. Cheap methods for doing that involve some nasty processes.

Comment Re:Solar panels made of sand (Score 1) 645

Dopant is explained in the link. You should RTFA.

Since the other guy isn't explaining how you are wrong, I will let you know that silicon transistors need both a p-type and n-type to work. The p-type is typically boron, and the n-type can be phosphorous or arsenic. The compound used to deposit the phosphorous (phosphine gas) is toxic. Arsenic is toxic.

Comment Re:things that seem to help (Score 1) 208

It will be possible to enable NPAPI in Chrome for some time yet. The reason for disabling it by default is to push plugin vendors to port to better approaches that don't leave your system security at the mercy of whatever web page you happen to hit.

According to this https://www.chromium.org/developers/npapi-deprecation they plan to completely disable NPAPI by September 2015. Your workaround buys him about 4 months.

Comment Re:It's the OS, Stupid (Score 1) 252

When it comes to laptops though, you're never going to build one yourself. Apple is the only vendor that actually sells "non-sucking" laptops if you will. HP sells nothing but the cheapest trash for laptops, and just about everyone else has gone out of business. It's incredibly painful to see people have to replace their Taiwan-brand laptop every 2 years, or watch people buy Chromebooks and then return them a month later because the build quality is rock-bottom.

You know there are laptop manufacturers besides HP and Acer, right? Asus, Samsung, and Toshiba have traditionally had good reputations for quality.

Comment Network Coding (Score 1) 129

I remember working on a project where network coding was proposed for micro satellite cluster communications. If I remember correctly, network coding requires that all the nodes in the network have complete knowledge of the state of the network at any given transmission window. This requires transmission of the network state which used something like 7% overhead. The routing of a message from one end of the cluster to the other was difficult. I believe it might have been an np-complete problem. Have they solved the routing issues?

Slashdot Top Deals

God help those who do not help themselves. -- Wilson Mizner

Working...