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Comment: Re:Comment from a Chemist (Score 1) 432

by rwiggers (#47091773) Attached to: Has the Ethanol Threat Manifested In the US?

Ethanol, as produced in Brazil, doesn't need to (but most probably uses, since biodiesel here is more expensive than regular diesel).
Even using diesel, amounts are small compared to energy production, crops are near the distillery.
The distillery itself has a positive energy balance, not including the ethanol it delivers (co-generation, using heat to produce power). Heat comes from burning the biomass byproducts.
For example, one ethanol producer in Brazil states in it's page an capacity of 940MW to be sold. http://www.raizen.com/pt-br/se...
Some short info on Petrobras production of biodiesel: http://www.petrobras.com.br/en...

+ - Net Neutrality legislation approved.

Submitted by rwiggers
rwiggers (1206310) writes "Known as the Marco Civil — or Bill of Rights — it would enshrine freedom of expression, the right to privacy and the principle of web neutrality. This could be understood as a response from the president Dilma to the NSA spying on her and is expected to be sanctioned soon.
Some aspects are quite interesting, content can only be removed by judicial order, net neutrality is written in law ans ISPs must take action to ensure privacy of communications.
http://www.bbc.com/news/blogs-...
http://www.techweekeurope.co.u...
http://g1.globo.com/politica/n..."

Comment: Re:Side Show and a Game Changer (Score 1) 199

by rwiggers (#45659011) Attached to: Affordable 3D Metal Printer Developed Based on RepRap

I wouldn't count on it taking any job from a CNC machine. it's a MIG welding machine and it's resolution/accuracy should be well over 1mm. It won't deal with a lot of metal also.
No, it's not the one size fits all.
It's very useful and interesting, allowing complex geometries more easily and I think local shops will have one once the techs (his and other techs for metal 3D printing) are mature.

Comment: Re:Ubiquitous internet actually makes this worse (Score 1) 66

by rwiggers (#43544631) Attached to: Thousands of SCADA, ICS Devices Exposed Through Serial Ports

Those things are usually installed by engineers with very little knowledge/concern about security. In my field there's an urge for bluetooth connectivity for the industrial equipments, with all the security nightmares bluetooth poses on accessing a device. Wi-fi could be used with a much better security model, but it's considered too complicated...

Comment: Re:Dying gasps (Score 1) 535

by rwiggers (#42517279) Attached to: C Beats Java As Number One Language According To TIOBE Index

I've made embedded programming in C++, in a rather efficient way. It makes a lot of things easier, but it's much harder to find someone that knows what that thing is doing. If you handle a task to an experienced C++ programmer and say no use of new, delete and exception handling are allowed, probably the task won't get accomplished unless it's very simple.
I used to advocate the use o C++ on embedded, but gave up. In a larger environment with programmers of different experience levels, C is much easier to get running.

Comment: Re:Legacy Code is not the issue here (Score 1) 360

by rwiggers (#41750195) Attached to: Ask Slashdot: How To Avoid Working With Awful Legacy Code?

Hit the nail.
If you have at least a little experience, you've already at least once gone through the codebase and asked who's the idiot that wrote that, checked the answer on the version control system to find that the idiot is yourself.
On the other hand, sometimes the legacy code is so much patched that it's easier and faster to rewrite it. If this code is that much patched that you can't even follow the code flow anymore, bugs left are only the scary ones anyway. Rewriting that code is a high risk task, since many errors already solved will be done again, but may still be worth it.

Comment: Re:Willingness to pay (Score 1) 224

by rwiggers (#40443319) Attached to: Tech Manufacturing Is a Disaster Waiting To Happen

No, redundancy means excess capacity.
Diversity means spreading the capacity through various locations/processes/etc. In this case we're talking about geographical diversity and the difference is simply distribution of the fabs around the world. If TSMC had its 15 factories spread over various locations, a single event couldn't shut down 100% of it's capacity.
The last year's earthquake in Japan shot down 1/3 of the Renesas fabs. It was enough to make a huge problem, stop some auto manufacturers, but it kept running. Had Renesas all it's fabs on North Japan, it would be 100% down. The fabs were not redundant, as one could not cover for the lack of other.

Comment: Re:Willingness to pay (Score 1) 224

by rwiggers (#40437917) Attached to: Tech Manufacturing Is a Disaster Waiting To Happen

It's about diversity, no redundancy.
For semiconductor manufacturing, for example. There's quite a few plants around the world, not that much of small process nodes. If a major earthquake hits Taiwan, shutting down TSMC and UMC factories, you'll notice the effect all around the world pretty fast.
This http://eetimes.com/ContentEETimes/Images/120514_icInsights_micron_800.png should give an idea.

Comment: Re:Power? (Score 1) 202

by rwiggers (#38235714) Attached to: Ice Cream Sandwich Ported To X86

Having compiled the same code for ARM, x86 and x86-64, with the same compiler, I dare saying that the ARM code is much smaller.
Compiles using -Os and GCC for all cores.
Embedded has code size as a limiting factor for quite some time now...

P.S. before saying that a sample size of one isn't evidence, I develop firmware for ARM and some other arch e frequently compile it on the PC for testing purposes.

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