Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
×

Comment Re:21st century version of compulsive hoarding (Score 1) 172

[...] I have original application software for platforms like the Sinclair ZX 128, DOS, Windows version 1, NextSTEP, OS/2, Amiga and OS 9 - stuff that just will not work on any modern hardware. Every once in a while, I will track down an emulator and actually tinker with it till I can coax at least a load screen out of the software. And as I am doing it, I will stop myself and ask what possible use it is. I keep telling myself that this is the equivalent of people who have kept elegant cars from the 1910 era running - people who are preserving human history. [ ... ]

If you haven't already done so, please check to see if the Computer History Museum or other public collection would be interested in a copy of some of this old software. Or maybe bitsavers.

Comment Re:Tesla (Score 2) 215

You also have to consider the efficiency. Running a 1GW power plant just to light a 100W light bulb a few kilometers away does not seem a good idea.

Yes, it is possible to transfer power without wires - radio has been doing it for a long time (a simple crystal radio set does not need any power other than what it gets from the antenna, but you'd better have some sensitive headphones, a big antenna and a station that is relatively close). The problem is transferring a lot of power efficiently and without huge antennas.

Their claims are apparently that they can achieve better efficiency than had been thought possible.

Anyone who wants us to believe differently should have independently verified proof. If you suspect parlor tricks, it's helpful to have a magician involved in addition to the scientist or engineer. "Extraordinary claims" and all that...

Or maybe a bad summary? Almost 50% loss over a relatively short distance might match the claims of "majority of the power".

Comment Re:What could possibly go wrong? (Score 1) 500

And there is my next movie idea. A rogue non-union group of asteroid miners, sick of lousy pay, blue gruel, and malfunctioning sexbots, actually tries to get an asteroid into a weapon-like trajectory in order to hold to Earth ransom for one bazillion, no wait, one gazillion dollars..../p>

Instead of non-union miners, how about prisoners (and their descendants) in a conspiracy with the worlds first AI? http://wikipedia.org/wiki/The_Moon_Is_a_Harsh_Mistress

Submission + - Hubble Reveals a New Class of Extrasolar Planet

An anonymous reader writes: Observations by the NASA/ESA Hubble Space Telescope have come up with a new class of planet, a waterworld enshrouded by a thick, steamy atmosphere. It's smaller than Uranus but larger than Earth.

An international team of astronomers led by Zachory Berta of the Harvard-Smithsonian Center for Astrophysics (CfA) made the observations of the planet GJ 1214b.
Robotics

Submission + - Robotic Squirrels Battle it Out With Rattlesnakes

Hugh Pickens writes writes: "Alasdair Wilkins writes that when a squirrel encounters a rattlesnake in the wild, it does something very peculiar to survive its brush with the predator — something is so peculiar that scientists are building robotic squirrels just to try to understand the behavior. A live squirrel does two things when it sees a rattlesnake. It starts moving its tail in a flagging motion and actually heats up the temperature of its tail. Because rattlesnakes can see in the infrared wavelengths, they should be able to see both the tail move and heat up. The question is which of these two signals is important and just what message it's supposed to send to the rattlesnake. To that end, engineers at UC Davis have built robosquirrels, which allow the biologists to simulate the two squirrel behaviors one a time and the research so far suggests it's the heated tail, not the flagging motion, that the snake responds to, making it one of the first known examples of infrared communication between two distinct species. "Snakes will rarely strike at a flagging adult squirrel — and if they do they almost always miss," says Rulon Clark, assistant professor of biology at San Diego State University and an expert on snake behavior. "In some cases, it seems the rattlesnakes just decide it's best to cut their losses after dealing with these confusing critters," adds Wilkins, "as sometimes the snakes just leave the area completely after encountering these flagging, tail-heating squirrels.""
Medicine

Submission + - Programmable Nanoparticles Improve Chemotherapy's Aim (sciencemag.org)

sciencehabit writes: Chemotherapy drugs are like a shotgun. Even though doctors are just aiming for tumors, the compounds hit a variety of other places in the body, leading to side effects like bone marrow damage and hair loss. To improve their aim, researchers have tried to package these drugs inside tiny hollow nano-sized containers that can be directed toward tumors and bypass healthy tissues. But the size, shape, and makeup of these "nanoparticles" can drastically affect where and when they are taken up. Now, scientists have surveyed the landscape of some 100 different nanoparticle formulations and shown that when a conventional chemotherapeutic drug is packaged inside the best of these nanoparticles, it proves considerably more effective at fighting prostate cancer in animals than the drug alone.

Comment Re: Speed at the line (Score 1) 475

They don't need to count the axles every time you pass though every toll booth. Where I'm at, you're not allowed to move your toll tag from one vehicle to another. And of course, when you apply for a tag, you have to specify the license plate and number of axles for each vehicle you want a tag for.

Comment Re:patently obvious (Score 1) 223

The author of TFA and author of the patent didn't say the same thing at all.

Patent Author

Unfortunately the patent industry relies far too much on *patent* prior art and ignores the vast corpus of *open* material. The result is that many patents look stupid on their face to anybody 'skilled in the art.'

[ emphasis mine ]

Article Author

This is a good point and one we've raised many times before. So many patents that are issued are ridiculed by people actually skilled in the art, demonstrating how they never should have been issued. But because the USPTO focuses much more on "prior art" (i.e., "is this new?" rather than, "is this obvious?") all sorts of obvious stuff gets patented.

Comment Re:API? (Score 1) 166

No, an API isn't like a phone number. Save phone numbers for the IP address analogies...

Queue car analogy.

An API is like the power socket or lighter socket on a car. They're all the same diameter, all provide 12 volts DC, etc no matter whose car you buy. This means anyone can create or sell a device that "hooks" into the car's power.

The "I" in API is "interface" of course -- An API is a standard for how two separate things talk to each other.

Oracle seems to want to say feel free to build something that plugs into our power socket, but don't you dare build something with a power socket like ours. Hopefully, copyright can't be twisted to allow that.

Comment Re:dumb question but... (Score 1) 82

...doesn't using a multipurpose OS kernel [ ... ] waste resources?

Most OSes tend to use a very small fraction of the total CPU cycles. Re memory; sure a custom OS might be more efficient than a general purpose OS. But, this device has 128 MB of memory. The first desktop I used to run Dell UNIX SysVR4 and later Linux had only 8 MB. In other words, the Linux OS is only needs a small percentage of this device's memory. And the advantages of using a well known and "good enough" and flexible OS cannot be underestimated -- it's similar to how the availability of UNIX helped multiple different hardware companies come out with their own mini-computers in the 1980s.

Comment Re:Maybe a better candidate (Score 2) 594

Huh? Not allowing a "null" pointer or otherwise illegal pointer value makes no sense. Either the pointer represented by all zeros is a valid pointer or it's an illegal value. If it's not treated as somehow special or illegal, it's by definition valid. Which would not be nearly as useful as having it be illegal. At best, it would be treated like any other random bit pattern in a pointer -- maybe pointing to legal memory and maybe not. In most languages close to assembly, a valid all zeros pointer would probably point to the beginning of memory; in virtual memory systems, it would probably point to the beginning of the process's space. IIRC, Algol had "references" that were not pointers. Actually Algol is the language with pass-by-name and thunking where it's infamously impossible to write a swap(a,b) function that could handle something like swap(A[i], i).

The word reference doesn't always mean exactly the same thing as pointer (See C++). I imagine Hoare did not mean "null pointer" when he said "null reference".

Trivia: Multics had multiple illegal pointers. I think they were 0 for null, -1 for new-process, and -2 for disconnect process. (Terminal login sessions had a single process). The "new_process" command that threw away your (single) munged process and gave you a fresh clean one was implemented in maybe two lines of code looking vaguely like: declare pointer shiva = addr(-1); *shiva = 666;

Comment From TFA (Score 1) 191

...
He coined these terms — open surface and open core — to describe a continued commingling — or a blurring — of open source and closed source software that lies at the core of the enterprise and the cloud.
Open core, or open source, is the existing model in which core features are open source and value-added proprietary commercial software is built on top of it to monetize the technology.
The open surface model, Microsoft’s approach, can be done with APIs, protocols and standards, the Microsoft exec said. The two models are coming together nicely.

So... A tivo is "open core" and a MS SMTP gateway is "open surface". I don't think we needed phrases or sound bites to describe the different ways that platforms could use a combination of closed and open source.

Also from TFA:

“Am I saying that openness doesn’t matter in the cloud? No, openness is extremely important [but] I argue that in the cloud the source code is the Terms of Use and the SLA,” Rabellino said, referring to service-level agreements.”

Comment Re:Campaign Promises (Score 1) 1042

You question was rhetorical, but yeah, of course we can blame them. Representation != echoing. The Representatives and Senators need to represent their constituents. That includes both their needs and their wants, both the present and the future. So, if you believe a member of congress has a position that is irresponsible and will cause damage to the country and their constituents, yes, blame them for it. (Admittedly obvious -- we rarely call someone irresponsible w/o blaming them).

Of course, I imagine those Tea-Party Republicans don't think they're irresponsible and do think their current stances will allow them to accomplish more of their goals and improve the country. If you agree, cheer them on. If you disagree, blame 'em.

Slashdot Top Deals

The hardest part of climbing the ladder of success is getting through the crowd at the bottom.

Working...