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Comment Wrong maths? (Score 1) 166

On the kickstarter page:

Power: 750 Watts continuous
Speed: 18mph without pedaling
Range: 12 miles with standard battery, 20 miles with extended battery
Battery: 240Wh / 400Wh

Well, it seems with the extended battery you can get about 32 minutes or 9.6 miles at 18mph, which is only half the range...

Comment It's over 9000... (Score 1) 717

Yeah, that's also my reaction. I regularly do between 50 and 60 hrs a week by working 11 - 12 hrs a day the whole week (and nothing the week end cause I would otherwise go insane), I've been doing occasonially 70 hrs (that is, add 10 hrs during the WE), and I think my max was around 80 hrs for some relly tough deadline near the end of my PhD. Right now, I finished a hard period, and I'll be calming things down to around 40 hrs a week in the few next month to regain some health. Seriously, 60 is hard, around 70 is just insane, and over that is ruining your health more quickly than anything else I've ever seen.

I've never met someone who was at work before me in the morning (8am) and still there when I quit (9pm) every day, and I'm "only" doing between 50 and 60. Of the friends that say they do big weeks, most of them try to call me before 8pm, so they're lying. So yeah, basically people count commute and lunch when they say over 60, and I am pretty sure not a lot of people have experienced a real 60 hrs week of work, without counting lunch, commute and pauses (which makes it around 14 hrs a day when you add these moments).

And anyone who has a kid and says he does over 50 is just lying...

Comment Proper vectorization (Score 1) 109

All I'm asking for in Java 8 is the integration of vectorization instructions in the jvm. Please, do something for that >10x time factor compared to C++ with a compiler using correctly SSE/AVX instructions. I know most of the business doesn't care, but for the few who are still doing some computationally intensive processing (unrelated to databases btw), it is a game changer.

Comment Re:Wide Dissemination vs LockBox (Score 5, Informative) 259

Researchers agree these terms because they have no other choice. Ok, seems nobody outside the academic gets the sense of publish or perish.
Let me tell you why I continue to send my works to Elsevier (or the others) journals, whatever they are asking in the terms and conditions.

In my country (France), to get a research position you first have to get a "qualification" which involves a threshold on the number of journal papers you have. The higher the impact factor of the journal, the better it counts. Once you have this "qualification", you can try to get a position - the system is competition based, and most of the time it is based on the number of high impact factor journal papers you have. So yeah, basically, if you try to play the cowboy before you have the position, you'll never get one.

Now, I do have such position and I could put all my stuff on arxiv. But I also have PhD students, and they want to work in the academic. if I tell them to go the open access way, they'll never get the "qualification" and the position. Thus, we chase these "important" journals (read significant impact factor), and send the articles there. As long as articles in these journals is mandatory to get a position, we have no other choice than publishing there for the students.

To my mind, the solution lies not in the hands of the researchers, by is rather a political one. If the government dictates specific recommendations that positions should be awarded to people with open bibliography, the stupid behavior of Elsevier will die. As long as no political action is taken, it will continue as it was.

Comment Re:Fixed-point arithmetic (Score 1) 226

If you are really having a precision problem, even in double precision, then it means you are facing an ill-conditioned problem. And if you are facing an ill-conditioned problem, then there is nothing a technological tool can do for you. Try to reformulate the problem to avoid bad conditioning, and FP will be fine.

Comment Propose projects on which newbies can start (Score 4, Insightful) 332

I'm actually managing an OS course for graduate students, and it's heavily based on linux (userspace and kernelspace). We do a few exercices (like writing a kernel module that computes averages), but nothing fancy. I've always been looking to propose them some projects related to kernel dev, but as I'm not a kernel hacker myself, I have clearly no idea of what seems reasonable.

So here's the deal: If you are involved on some subsystem of the linux kernel and you have something you want to get coded that can be a first experience with kernel dev, and that can be done under about 100 hours (the length of a typical project), you contact me. I'll do as much as possible as a first step filtering so that you won't get spamed. It's a win-win situation: I have great projects for my students, you get free work. For this year, it's a bit short, because projects are from September until January, but next year is ok.

Comment Re:Heh. (Score 5, Interesting) 256

It's funny to see people finally realize that the world we're headed to is very similar to that of East Germany, with the slight difference that you won't be assured to have a house, a job and food every day. Probably these points were not among the good things to retain from the Commies, whereas global surveillance was.

Comment Re:motivation (Score 2) 63

Exactly. My guess is that this publishing method is not the cause but the consequence of the current disfunction. Researcher are evaluated on prestige, exactly like businessmen are evaluated on money. That alone means that as a recognized researcher, you have absolutely no interest at seeing concurrent work get published, or perhaps only if they heavily cite your work. With such system, young researcher in small labs will never get any good publication (read in famous journals), whatever the quality of their work, except if they manage to attract a big name.

We have completely reproduced the capitalism system, albeit replacing money with citations. If you were "born" with a good initial capital because your advisors were rich, then you'll easily get more capital, creating dinasties of researchers. I'm not saying these dinasties are incompetent, I'm saying they are after some point barely correlated with competence, and that they mask really brilliant people, which in the end will lack proper funding and quit science.

You would have guess the world of science would have been more objective than that of business, but truth is humans are the same everywhere.

Comment Re:MathML is Retarding (Score 1) 84

There are many cases where the symbolic formula is much simpler than the equivalent program. Take any matrix factorization for example (QR, LU, SVD, etc), the programs to obtain them are rather complex (take a look at a good implementation of the divide and conquer algorithm for eigenvalue decomposition), while the equivalent formula is nothing more than 3 or 4 characters.

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