Follow Slashdot stories on Twitter


Forgot your password?

Comment Re:3D maps... well, that's ambitious. (Score 1) 88

when things move as fast as satellites move, you never really know where they are. even a 0.01% uncertainty in velocity of a typical satellite going ~2000m/s... after about a minute the resulting position would have a bounding box of 12 meters. Now, after an hour, a day? It's not too difficult to lose track of where you need to point your radars to find your bird.

[Calculation is very general, I pulled that 0.01% velocity uncertainty from my ass]

Comment Re:Here we go again (SCO) (Score 1) 675

The CEO of VMWare Paul Martiz thinks that everyone is moving to Python/Ruby, specifically Django and Rails as replacements for the J2EE stack.

Think of it what you will, but unless you've tried to write a small-medium sized project in Python (as suggested by ESR: ) then you don't know what you're missing, especially if you're moving from Java.

Comment Re:How convenient... (Score 1) 107

Actually, I thought it deserved a comment because he reversed the usage on both:

Google has plans to scale they're broadband experiment up to 50,000-500,000 homes before their done.

Should be "Google has plans to scale thier..." and " before they're done."

Such improper usage leads me to believe that the original poster just does not understand proper grammar.

Comment Re:Only one real reason (Score 1) 329

You're wrong, please don't be defensive.

Nothing was ever designed in Alabama. Defense contractors in Southern California (mainly Los Angeles) used fabrication facilities to manufacture things in Alabama, but all of the science was done in LA. All of the scientific brainpower for those companies have never resided in Huntsville, it's a shithole.

And JPL? I thought that was a Caltech institution? You know, in eastern Los Angeles? And Los Alamos National Lab in Santa Fe, NM might have something to do with the design of the nuclear bomb.

Because a company or an institution has offices in a rural southern state for cheap menial jobs, does not mean that those laborers contribute science or engineering designs. They don't.

Social Networks

Submission + - Roughly 3 out of 4 Tweets ignored ( 2

alphadogg writes: Social media analytics company Sysomos studied 1.2 billion Twitter posts made over the past 2 months and found that 71% elicited neither a retweet nor reply.

"When a tweet generates a reply (aka @) or a retweet (aka RT), it suggests the tweet has resonated enough with someone that it sparks a conversation or encourages someone to share it with their followers," the company writes.

Of course this doesn't consider that lots of people read or view content — on Twitter and in other forms of media — and don't necessarily feel compelled to respond.

According to the Sysomos study, just 6% of Tweets measured got retweeted and 23% were apparently intriguing enough to warrant a reply.


Submission + - Facebook introduces one-time passwords ( 4

angry tapir writes: "Worried about logging into Facebook from a strange computer? There's now a way to get into the popular social network without entering your regular Facebook password. It's called a temporary password. To use it, users must list their mobile phone numbers with their Facebook accounts. They can then text a number from their phones and Facebook sends back a temporary password that is good for 20 minutes. The service will be available worldwide in the next few weeks."

Comment Re:Some more math-specific ideas (Score 1) 283

This is a good list. If for one, it shows that the original author might look beyond the boundaries of libraries written in C++. I personally would recommend numpy ( because I've been doing mostly python coding in the last few years. Also, to note, that some/most of the backend to numpy is written in C.

However, if the submitter really wants to start contributing to open source libraries, they really should start at writing test cases and documentation. Contributing code to them is not something that maintainers usually like to take from people that are not associated with the project. Joining the mailing list was a good idea, but they really should download the code and run the set of test cases. Then, knowing what he knows, look into his area of expertise and see if there is test coverage he could add.

In summary, look into an alternate programming language library, download and run the library's test cases and fill in the test case coverage and write it up in their documentation.

Comment Re:iOS is woefully behind on ease of use? (Score 1) 176

and all of them stays in alphabetical order in the menu, which makes finding an app much more easier

swipe to the left on the home iOS screen, type in the first letter of the application you want into the search box... and Spotlight will bring up a list of applications starting with that letter.

They all do the same stuff, albeit in slightly different ways.

Comment Re:Wrong, this is not a branding case. (Score 1) 341

the question then becomes, what is meant by a "complete implementation" of java?

I mean, why did they not sue projects like blackdown and other open JVMs that were not 100% implemented? I understand that the Android Dalvik is not a "JVM", but the question remains: what is a "complete implementation"?

Slashdot Top Deals

A computer scientist is someone who fixes things that aren't broken.