Oracle’s finally going to make good on their threat to stop allowing unsigned Java code to run from web browsers.
This may wreak great havoc in the world of lame web-launched java-based applications. Such as those infesting governments, hospitals and large corporations who aren’t savvy enough to use LAMP for their web development.
Good software will not be in any way impacted by this event.
If you’re running the Chrome web browser, you can load a plug-in that will change any occurrences of “cloud” or “the cloud” to “butt” or “my butt” respectively, but only in proper context (it knows about weather sites, for example).
And if that’s not enough hilarity for you, you can load a different one that implements the text substitutions from Randall Munroe’s XKCD #1288. There’s also a Firefox version of the latter.
RSS is baked into WordPress. I didn’t hack anything in there (for RSS, that is).
Use this link to visit the RSS page.
Sean Hollister shares the numbers:
$12.97 for a “warm white” 60-watt equivalent, providing 800 lumens of light for 9.5W of electricity, at a warm color temperature of 2,700K
$13.97 for a “day light” 60-watt equivalent, with 800 lumens of light at a cost of 9W of electricity, at a cooler color temperature of 5,000K
$9.97 for a “warm white” 40-watt equivalent, with 450 lumens of light for 6W of electricity, again at a warmer 2,700K.
You can buy direct from Cree if you prefer.
I often hear people say things like “the universe is made of math” or “faster than light travel has been mathematically proven to be impossible”. This sort of thing always annoys me, particularly when it comes from educated people.
Mathematics is a descriptive language, that attempts to model reality so closely that it can be used to calculate physical values accurately without direct measurement. It can also be used to make predictions that can be verified through experimentation.
Kurt Gödel’s work implies that this may be an inherently flawed approach to some enterprises; it’s possible that any language that can approach an accurate representation of reality must necessarily allow paradoxes (like Russell’s Antinomy, for instance). The answer to some questions may well be mu rather than true or false.
Math is wonderful. Despite its limitations, math is incredibly useful to humans, since it offers powerful “short cuts” in investigative and experimental procedures that can then be verified, if necessary, through physical experimentation and measurement. Most of us would have much poorer lives without math.
But math never “proves” anything. That’s not what math is for! Logic, reason, experimentation, observation, measurement – these are the sources of proof. Reason and logic can employ mathematics, just as a book can employ the English language – but when experimentation disproves a prediction made by a descriptive system like mathematics, we revise the math; reality does not magically reorganize itself to fit our incorrect description.
Some people believe that the Universe is comprised of a systematic computational architecture, that we perceive as physical reality. See Rechnender Raum, for example. Those people sometimes also believe that once we’ve got math really and truly figured out, our math will be equivalent to or congruent with reality. But nobody sane thinks we’re at that point yet, not even Wolfram, so the idea that something can be “mathematically proven” to be true in the real physical world is a conceit.
I find the variety of electric motors to be remarkable, and the textbook explanations of their operation nearly impossible to relate to any particular motor I’m trying to fix. Usually I don’t know why it works, even after I fix it, unless I take a week to study it, and I rarely have that kind of time. The diagrams in the references never look anything like the real motors!
Enter John Storey of the University of New South Wales Physics Department, and his brilliant How Real Electric Motors Work web pages.
Americans will have to remember that mains frequency in Oz is 50 Hz – hereabouts, line frequency is 60 CPS.
I find Keith Kholamon’s Giant Balls to be inexpressibly delightful. As Kholamon says in the video, “The process is the art”.
Tip of the old straw boater to Jake von Slatt for the link!
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