Forgot your password?
typodupeerror

Comment: Re:New Object (Score 1) 70

by rjh (#48206649) Attached to: Astronomers Find Brightest Pulsar Ever Observed

A neutron star is a gravitationally-bound sphere of neutrons, not plasma, and yet it's still a star.

I would respectfully suggest that a good definition of a star would be, "a gravitationally bound collection of energetic matter engaged in largely Brownian motion." That covers everything from brown dwarfs (D-D fusion requiring substantial energy to initiate) up to hypergiants and neutron stars. (Even a cold, dead neutron star possesses enough energy to dramatically warp spacetime -- there's a lot of energy there to be tapped.)

This definition would also exclude black holes, as a singularity isn't really "matter" per se -- matter requires volume, and a singularity has none of that.

It would also exclude galaxies and accretion discs, as those are not engaged in Brownian motion.

Comment: Re:Sound waves as quantum particles? (Score 2) 66

by rjh (#48132861) Attached to: Hawking Radiation Mimicked In the Lab

You can thank wave-particle duality. In the quantum world, if something has an existence as a wave, it must also have an existence as a particle. Sound waves have a particle analogue: phonons.

Also remember: in quantum mechanics there's no such thing as a vacuum. Virtual particles spring into existence constantly, making it possible to interact with vacuum in a number of really surprising ways.

Comment: Re:gtfo (Score 1) 724

by identity0 (#48060703) Attached to: Intel Drops Gamasutra Sponsorship Over Controversial Editorials

This Slashdot writeup is incredibly shit, because it's not linking to the actual article that caused Intel to pull out.

Ask yourself why Intel would continue advertising in a site whose chief editor wrote that.

I don't even think it had to do with gamergaters "pressure", other than that they brought attention to it.

Comment: My story with Epic (Score 1) 240

by rjh (#48041475) Attached to: Back To Faxes: Doctors Can't Exchange Digital Medical Records

Some years ago after being laid off from one programming job, my old CS prof from college suggested I stop by to interview with the Epic recruiter who was visiting the campus. I was told to block out about four hours time, and that it would be a very in-depth technical interview. It turned out to be nothing of the sort: it was maybe ten minutes of talk with a human being, and hours and hours of filling out a badly-written "technical exam". Allegedly it involved seeing how well the taker could think about programming languages and programming language concepts by giving us a toy language to write a parser and compiler for, but ... holy toledo, was it a stinker.

First, the language was defined in plain English. There was no BNF. When ambiguities of English occurred (as they always do), the Epic rep was unable to give any resolution as to what the language was supposed to do. My protest of, "Well, if you don't know what it's supposed to do, how can you expect me to write a parser or compiler for it?" fell on deaf ears.

Second, certain mathematical operations were supposed to be supported ... but the language was vague: they were supposed to have their "conventional" meanings. But some mathematical operators are defined sort of vaguely: for instance, it's not really well-defined mathematically what the modulo of two negative numbers are. As a result, different programming languages tend to implement it differently. (For instance, C++03 says it's implementation-dependent, while C++11 has a strict policy on it.) How did they want the modulus operator implemented? They had no idea.

Ultimately, when it came to writing a parser and compiler for their toy language I decided to do it the right way as opposed to their way. Instead of having an ad-hoc thing, I turned the exam over and started writing a formal BNF and lex/yacc rules on the back of the pages. I took the full four hours to do the technical exam, turned it in, told them that my work was on the *back* of the exam and not the front, and walked out.

Six weeks later, not having heard a thing from Epic, I sent them a politely-worded email saying, "If I'm going to spend four hours on a Saturday on an interview for Epic, I would appreciate the courtesy of being told whether I would be receiving a job offer or not."

A week after that I received a one-line email: "We regret to say that we're going with other candidates."

Anyway. That's my experience with Epic. Take it for whatever it's worth. I didn't think much of their interview process, and they sure didn't think much of me.

Comment: HTML5 is a language. (Score 1) 387

by rjh (#47868549) Attached to: Unpopular Programming Languages That Are Still Lucrative

HTML5 is, indeed, a programming language -- at least when paired with CSS3. You can implement Rule 110 in nothing but HTML5 + CSS3, and Rule 110 is known to be Turing-complete. Ergo, HTML5 + CSS3 is capable of any computable process, and is a full programming language.

It's a horrible programming language, but hey, when has that gotten in the way of widespread acceptance?

Comment: A story about Damian... (Score 4, Interesting) 132

by rjh (#47384857) Attached to: Damian Conway On Perl 6 and the Philosophy of Programming

At OSCON 2006 I was sitting in one of the green rooms (the spaces set aside for speakers before presentations). My laptop was open and I was happily hacking away on a project. As I killed a bug and checked the code back in, I muttered under my breath, "Python, I love you. You make the hard stuff so easy."

I noticed a few seconds later the room had gone utterly silent. I looked up, and sitting at the table across from me was Damian Conway, tapping away on his own laptop doing his own thing. I blinked a couple of times and suddenly noticed the entire room was expecting a Perl-vs-Python argument to erupt.

Damian looked up from his work, noticed everyone was looking nervous. He looked over at me, I gave a "I don't know what's up with them, uh, help?" look and a shrug.

Damian then looked back at the crowd and grinned. "Listen, the only thing I love more than Perl is well-written software, even if it's written in Python." He looked back over to me. "Kill a bug, didja?" I nodded. He gave me a smile and a thumbs-up, then returned to his code. I returned to mine, and after a few seconds the room let out his breath.

I love Python. But the only thing I love more than Python is well-written software, even if it's written in Perl. :)

Comment: Re:Communist revolution is needed (Score 2) 548

by rjh (#46907171) Attached to: Reason Suggests DoJ Closing Porn Stars' Bank Accounts

here on Slashdot we frequently have people (the "2nd amendments folks") allude to using their guns to overthrow the US government by force (which is obviously a totalitarian strategy) and also threatening to arbitrarily kill people for various perceived offences without a proper trial

Hi! As a card-carrying NRA member, I'm one of those "Second Amendment folks" you're talking about here. A couple of points:

  1. It's "the Second Amendment," not "the Second Amendments." There's only one Second Amendment.

  2. Overthrowing the government by force is the right of the people, yes. It's also unbelievably stupid in the overwhelming majority of cases. Civil war is horrific and something best avoided. The Framers did intend the armed populace to be a bulwark against governmental infringements on liberty, yes, but mostly by means of making the government afraid to violently oppress the people for fear of the armed resistance they would face.

    In this, the Framers have been overwhelmingly successful: where in past eras a government would've just bludgeoned people into believing the law was what they said it was, nowadays our politicians have learned to couch things in terms of "counterterrorism" and "protecting the children" and we'll quite amicably assent to whatever they say the law is.

    The Framers had the right idea, they just weren't quite clever enough: they thought the risk would be a government that used force against the people, whereas the real risk is from public relations and focus groups.

    Anyway -- short version: although I am one of those "Second Amendment folks," I, and all of the other "Second Amendment folks" I know, am absolutely against civil war. Horrible, terrible idea. I've seen enough gunshot wounds already in my life, thank you very much: I feel no need to be the cause of them.

  3. This would amount to "terroristic threats", and would be considered grossly illegal in all 50 states. I, and all of the other "Second Amendment folks" I know, think this behavior is reprehensible.

Comment: Re:You don't understand, yep! (Score 3) 149

by rjh (#46730045) Attached to: NSA Allegedly Exploited Heartbleed

I'm not weighing in on that one. I'm only correcting the original poster, who said the U.S. rarely waives sovereign immunity. In fact, the opposite is true: it rarely invokes it. Tens of thousands of tort claims against the U.S. government are underway even as we speak, all of them with waived sovereign immunity.

Comment: You don't understand, yep! (Score 5, Informative) 149

by rjh (#46729651) Attached to: NSA Allegedly Exploited Heartbleed

One cannot simply sue a branch of the government without asking permission from the government to allow it to be sued - guess how often THAT happens?

Glad you asked: it happens all the time, ever since the Tort Claims Act of 1948 substantially waived the sovereign immunity doctrine. You can read more about it at Wikipedia.

People sue the government all the time. It's literally an everyday occurrence.

Comment: Not in any way the same! (Score 1) 307

by rjh (#46668189) Attached to: Should NASA Send Astronauts On Voluntary One-Way Missions?

Patton told his troops they were strictly forbidden from dying gloriously for their country, but were instead expected to make the other poor bastard die gloriously for his.

When we send soldiers off to battle we expect them to win and come home alive. We accept that reality will not always permit this, but that's the nature of the beast. If we send people on a one-way trip to Mars, we are demanding that they die gloriously for us -- which is exactly what Patton forbade his soldiers to do.

Your comparison, not to put too fine a point on it, is crazy.

Comment: Great job in critiquing the models (Score 1) 560

by rjh (#46298313) Attached to: How Well Do Our Climate Models Match Our Observations?

Nowhere is it written that your critique can only be taken seriously if you fix the problem you discover, propose an alternate model, or solve the problem outright. By your logic, all the people from the 1800s on into the early 20th century who said, "You know, Newtonian mechanics has a serious problem: it cannot correctly describe the precession of Mercury" were doing a poor job of critiquing Newtonian physics.

Rubbish. They were doing a superb job of critiquing Newtonian physics by pointing to something in the Newtonian model that was clearly, unambiguously, wrong. They may not have been able to realize why it was wrong or able to construct a better model, but they pointed out an important anomaly. Later on, Einstein came along and proposed General Relativity, and one of GR's greatest initial successes was its ability to correctly model the precession of Mercury.

If John Christy's reading of the facts is in error, then that's ample grounds to say he's made a poor critique. But to say that he's made a poor critique just because he hasn't fixed the models, put forward a new model, or explained the differences between model and observation, betrays you as a very poor scientist.

The trouble with opportunity is that it always comes disguised as hard work. -- Herbert V. Prochnow

Working...