Beta
×

Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

We are sorry to see you leave - Beta is different and we value the time you took to try it out. Before you decide to go, please take a look at some value-adds for Beta and learn more about it. Thank you for reading Slashdot, and for making the site better!

Comments

top

Haier Plans To Embed Area Wireless Chargers In Home Appliances

friedmud Sounds wasteful and stupid ... (61 comments)

Maybe not in the home... but think about public spaces. Put a few of these in a hotel lobby and everyone traveling through there can get a charge.

What about at Airports? Put one in the middle of each waiting area and all the passengers get a charge.

How about meeting rooms at companies?

Not too mention restaurants (Starbucks?)...

There are tons of places where lots of people congregate and they would appreciate getting a "top up" on the their batteries.

This is not a question of "if" only of "when"... and these are the first steps toward that...

about three weeks ago
top

Avast Buys 20 Used Phones, Recovers 40,000 Deleted Photos

friedmud Re:Only Android? (231 comments)

If you don't wipe your phone this can happen with anything (including an iPhone)...

However, if you reset an iPhone there is NO way to recover anything. Everything written on an iPhone is encrypted... when you reset an iPhone it securely wipes the key and then nothing is retrievable.

about 4 months ago
top

Why Scientists Are Still Using FORTRAN in 2014

friedmud Re:We're Not (634 comments)

Interesting... I'm not sure what's unproductive about producing a freely available scientific engineering platform that is directly impacting the energy generation issues in this country.

But, ok :-)

about 6 months ago
top

Why Scientists Are Still Using FORTRAN in 2014

friedmud Re:Yes you are (634 comments)

You can install PETSc without a Fortran compiler at all. Change that --download-f-blas-lapack to --download-c-blas-lapack and you're good to go...

In fact... MOOSE works on platforms without a Fortran compiler at all... although we generally recommend that you have one (so that you can still link in any legacy routines you've written in Fortran).

I'm not specifically against Fortran... I was just trying to say that most new computational science development at the National Labs is NOT being done in it. We've moved on...

about 6 months ago
top

Why Scientists Are Still Using FORTRAN in 2014

friedmud Re:We're Not (634 comments)

Firstly... 10^-15 is WAY beyond what most scientific codes care about. Most nonlinear finite-element codes generally shoot for convergence tolerances between 1e-5 and 1e-8. Most of the problems are just too hard (read: incredibly nonlinear) to solve to anything beyond that. Further, 1e-8 is generally WAY beyond the physical engineering parameters for the problem. Beyond that level we either can't measure the inputs, have uncertainty about material properties, can't perfectly represent the geometry, have discretization error etc., etc. Who cares if you can reproduce the exact same numbers down to 1e-15 when your inputs have uncertainty above 1e-3??

Secondly... lots of the best computational scientists in the world would disagree:

http://www.openfoam.org/docs/u...
http://libmesh.sourceforge.net...
http://www.dealii.org/
http://eigen.tuxfamily.org/ind...
http://trilinos.sandia.gov/

I could go on... but you're just VERY wrong... and there's no reason to spend more time on you...

about 6 months ago
top

Why Scientists Are Still Using FORTRAN in 2014

friedmud Re:Why is anyone still using C++ in 2014? (634 comments)

Not everyone needs to know all of the quirks of C++ to use it. My project ( http://mooseframework.org/ ) does all of the nasty C++ stuff under the hood so that we can expose a very straightforward interface to non-computer-scientists.

It's working out well so far.

Object-oriented is still a good paradigm until the functional language people get everything figured out and there are enough computational science libraries written in functional languages. And if you want to do object-oriented and you still want to be fairly close to the metal for performance reasons then C++ is a good choice.

There are people that do object-oriented with C like the PETSc team ( http://www.mcs.anl.gov/petsc/ )... and they have good reasons for doing so... but the result isn't necessarily less imposing to the uninitiated than C++...

about 6 months ago
top

Why Scientists Are Still Using FORTRAN in 2014

friedmud We're Not (634 comments)

I saw this link bait the other day...

We're NOT using Fortran anymore...

Many of us at the National Labs do modern, object-oriented C/C++... Like the project I'm in charge of: http://www.mooseframework.org/

There are whole labs that have completely expunged Fortran in favor of C++... Like Sandia (http://trilinos.sandia.gov) who actually went through a period in the late 90s and early 2000s where they systematically replaced all of their largest Fortan computational science codes with C++.

Those places that don't use C++ use C like the awesome PETSc library from Argonne ( http://www.mcs.anl.gov/petsc/ ) which actually employs an object-oriented scheme in C.

The big name modern codes that are getting run on the biggest machines are generally done in C and C++.

I don't see that situation changing anytime soon as there is simply a massive amount of C and C++ libraries that will continue to provide the engine for tomorrows codes. The trend i see happening most often is utilizing C and C++ libraries with Python glue for everything doesn't need raw speed.... I think that trend will continue.

about 6 months ago
top

Programming Language Diversity On the Rise

friedmud Re:A good sign (177 comments)

Are you trying to say you don't find any value in GitHub?

I'm (semi) with you on knew languages... but new platforms like GitHub have totally changed how people develop open source projects...

If you haven't tried it... then you REALLY should.

about 6 months ago
top

GitHub Open Sources Atom, Their Text Editor Based On Chromium

friedmud Re:"web-based" (121 comments)

It does not run in the browser. It's a standalone application that is based on web technologies.

about 6 months ago
top

GitHub Open Sources Atom, Their Text Editor Based On Chromium

friedmud Re:Prime Example of Software Bloat (121 comments)

And my current Emacs: 150MB

What's your point?

You don't have 100MB of RAM to spare?

about 6 months ago
top

GitHub Open Sources Atom, Their Text Editor Based On Chromium

friedmud Re:mac only? (121 comments)

That's not it - I've been in the beta for a long time... they are just targeting Mac first.

In the web develop / startup world around San Francisco (where GitHub is) Apple computers are fairly popular... and that's apparently what GitHub primarily uses.

about 6 months ago
top

GitHub Open Sources Atom, Their Text Editor Based On Chromium

friedmud Re:mac only? (121 comments)

It will be on more platforms soon - they just chose Mac first because that's primarily what's used at GitHub.

about 6 months ago
top

GitHub Open Sources Atom, Their Text Editor Based On Chromium

friedmud Re:EMACS 2.0 (121 comments)

To be fair... Emacs 10.7 running on my Mac is currently consuming 150MB...

We've moved on past the days where we care how much memory this stuff takes up. If you're a developer you've probably got a pretty decent machine anyway.

I personally want more features... and more features means more memory and I'm happy to give it.

I did try Atom for a week and it wasn't quite ready for what I wanted to do with it and so I moved back to Emacs. I'm going to keep any eye on it though because the extensibility is CRAZY easy so there are going to be TONS of plugins built over time...

about 6 months ago
top

1.5 Meter Long Meteorite Fragment Recovered From Russian Lake

friedmud Re:Slashdot Officially Sucks (86 comments)

Hehe - please don't label me a conspiracy theorist! ;-)

This is why I wanted to see the discussion - because my own intuition (which I totally agree is not based on any real world experience of such an event) led me to think that the ice hole wasn't right. Unfortunately, everyone was too damn busy making Soviet Russia meme jokes to actually talk about the physics involved...

But - we've now been able to have a bit of good discourse here in this thread and my understanding has definitely increased from the posts of others...

about a year ago
top

1.5 Meter Long Meteorite Fragment Recovered From Russian Lake

friedmud Re:Slashdot Officially Sucks (86 comments)

Thanks for the link (and the "analogy") - that did help... and THIS is what I was hoping to find in the discussion ;-)

about a year ago
top

1.5 Meter Long Meteorite Fragment Recovered From Russian Lake

friedmud Re:Slashdot Officially Sucks (86 comments)

Cool - I'm ok with that - that's why I came here to see some discussion ;-)

Mind providing some insight on why it wouldn't have? The car "analogy" above does give a good "feel" for why that hole wouldn't have been larger (although the terminal velocity of a rock would be somewhat higher than a car).

A bit of math / physics here would be insightful....

about a year ago
top

1.5 Meter Long Meteorite Fragment Recovered From Russian Lake

friedmud Slashdot Officially Sucks (86 comments)

After reading the summary and scanning the article (in true Slashdot fasion!) I went to look at the comments... and they are all complete drivel. Tons of stupid jokes and no actual discussion of the event. What the hell has happened here??

Anyway - back on topic: Does anyone else feel like that rock is WAY too big to have only left a 6m hole in the ice? That rock impacting the ice/water would have been an enormous event... it would have vaporized a ton of water and blown the ice away for at least several hundred feet.

Something doesn't add up here.

about a year ago
top

Samsung Fudging Benchmarks Again On Galaxy Note 3

friedmud Re:Benchmarks are bad metrics (258 comments)

As an aside - we just bought a couple of OCZ Revodrive 3 x2 (1TB each) cards and have been using them and benchmarking them over the last couple of days for scientific data analysis... DAMN they are fast! We're getting about 1.2GB/s (yes Bytes with a big B!) consecutive reads (which is was our main purpose happens to be).

The only downside we've found is spotty Linux (which, along with OSX is all we use... no Windows here) driver support. We have to actually use the commercial drivers for the Vertex and ZDXL... which are only precompiled for specific Linux kernel versions. Other than that the cards have worked great!

A bit back on topic - if this "turbo" mode were something any app could invoke somehow (with an API call for instance) then this wouldn't be a problem... but since they've only made it work with explicitly named executables it feels a bit underhanded....

about a year ago
top

I use spinning-drive storage media ...

friedmud Re: Storage. (232 comments)

The only drives in my work machine are 3x512GB SSD's in a RAID0 array. This is to deal with datasets in the 300GB range that my code outputs as it runs on supercomputers (10,000+ cores).

When you're trying to make an animation that needs to read all 300GB serially through a file like that SSD's are a godsend.

Just last week I purchased a new workstation for tens of thousands of dollars (don't want to put the exact amount on here). It contains a 1TB "Revo" PCIE card (extremely fast SSD chips that plug into PCIE), 512GB of RAM and a Nvidia Quadro K6000 and a K5000.... all to accelerate this same workload...

Just because you can't think of workloads that would be useful with solid state drives doesn't mean they don't exist!

about a year ago

Submissions

top

Amazon Launches DRM Free Music Service

friedmud friedmud writes  |  more than 7 years ago

friedmud (512466) writes "As covered by Reuters, Amazon has launched their new DRM Free (all files are 256kbps MP3) music service called (imaginatively): AmazonMP3. They currently have over 2 million songs from both independent and major labels. Most songs are $0.89 with albums mostly falling in the $9 range (but as cheap as $5). The selection appears to be far superior to E-Music while being much less restrictive than most of the music on iTunes. Is this the holy grail of online music stores that we've all been waiting for?"

Journals

friedmud has no journal entries.

Slashdot Login

Need an Account?

Forgot your password?