×

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!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!

Comments

top

Most Expensive Aviation Search: $53 Million To Find Flight MH370

photonic Re:Tracking` (233 comments)

Data charges would be much less than that, $20 extra per ticket would be unacceptably high. Some spokesman for Inmarsat (who obviously has a big interest in making permanent data connections mandatory) said that data costs for such a flight would be on the order of 1$/hour for the whole aircraft. Data rates should also be pretty low, 1 GPS coordinate per minute would have helped enormously for both the AirFrance and MalaysiaAirlines crashes, the detailed high-bandwidth data you can always get from the black box if you can find it.

about two weeks ago
top

Your Car Will Tell You How To Hit the Next Green Light

photonic Re:Part of this is a late April fools joke. (364 comments)

True story: The lecturer that taught us general relativity at university was a fantastic guy that was also pretty good at drawing cartoons. For one of the questions on the final exam, he drew a scene of a guy being stopped by a policeman: "I am stopping you for crossing the red light." "I saw it as green, I swear officer." "Fine, then I will write you a ticket for speeding." The question was to calculate the speed of the car, given the wavelengths of green and red light and the velocity of light.

about two weeks ago
top

Adaptation From Flash Boys Offers Inside Look at High-Frequency Trading

photonic Re:Forbit all HFT (246 comments)

contribute to society except for profit for themselves

Your opinion, fortunately we aren't slaves to one person's opinion as to what is valuable "to society". I am sure all the employees, their families, children, dogs, etc. of the HFTs, producers of all the networking and computing gear they use, the buildings and home they inhabit, the doctors they visit, and so on, might disagree with you about the lack of contribution to society.

That is a bad argument: People making money with organized crime spend money on employees, family and goods too, but that does not make it a good thing. If the HFT people would not be skimming billions of dollars from the market, millions of people might have received 100$ more since their pension fund would have done slightly better, and they would have spent it the same. What did the HFT contribute to society to rip off all those people?

about three weeks ago
top

Adaptation From Flash Boys Offers Inside Look at High-Frequency Trading

photonic Re:Forbit all HFT (246 comments)

The question is if it is not too late to introduce regulations. These leeches probably made enough money to corrupt Congress for the next 100 years.

about three weeks ago
top

Adaptation From Flash Boys Offers Inside Look at High-Frequency Trading

photonic Forbit all HFT (246 comments)

HFT should be banned, there is nothing these robo-traders contribute to society except for profit for themselves. The argument that they provide for liquidity of the market, or whatever, would not change if everyone would be trading at second scale instead of microsecond scale. My proposal (as someone how knows nothing about stock markets): make it a level playing field and only allow trading at say exact 30 second intervals or so, which should be synced world-wide. In this way, the big firms would only have an advantage over the small guy when new information becomes available in the last half second before the deadline, instead of on every instance of new information. After everyone has placed their orders for the current round, the stock market then takes a few seconds to update all stock prizes, after which everyone has 'infinite time' to compute his action for the next round.

about three weeks ago
top

Last Week's Announcement About Gravitational Waves and Inflation May Be Wrong

photonic Re:Jumping the gun (194 comments)

Scientist are still analyzing the data of ESA's Planck satellite, with first results expected in October this year. This instrument is supposedly sensitive enough to confirm or reject BICEP's results. I guess Planck's team must feel pretty depressed that the potential big discovery of their 700 MEuro instrument is scooped by the relatively small-scale BICEP experiment.

about three weeks ago
top

Big Bang's Smoking Gun Found

photonic Indirect measurement of gravitational waves (269 comments)

Note that this the second indirect evidence for the existence of gravitational waves, the first one was the orbital decay of a binary system that included a pulsar, discovered by Hulse and Taylor (Nobel Prize 1993). Today's result, if confirmed, seems pretty spectacular, and might be rewarded with a second Nobel Prize. For a first direct detection of gravitational waves, we have to wait for first detections by LIGO, Virgo and eLISA.

about a month ago
top

The Earth As a Gravitational Wave Detector

photonic Re:Resonant Detector (70 comments)

The LISA project has a long history, with several iterations of down-sizing its costs, and at some point the Americans pulled out of the project completely. The latest version of the project is called ELISA, which was recently approved as ESA's L3 mission in 2034. A bit late, but better than nothing ...

about a month ago
top

Ubuntu 14.04 Brings Back Menus In Application Windows

photonic Re:Oh thank god (255 comments)

Exactly. I like the global menu in general, but almost once a day I close some underlaying window by accident, since it still has focus.

about 2 months ago
top

What Are the Weirdest Places You've Spotted Linux?

photonic Multimedia overlay on ruins in Rome (322 comments)

Last year, I visited the Palazzo Valentini in Rome, which is just a few steps away from Piazza Venezia and within falling distance of Trajan's column. They dug up some Roman remains of houses and temples in the basement of a more modern building. They did quite some effort to make it into a multimedia show, with beamers projecting accurately aligned overlays of all kind of things that had disappeared. One cool effect was for example to extend a mosaic, of which only a small piece was left, over an entire room. I was observing how the tour-guide started the shows, he was just launching a VLC player or so on a linux box sitting in a rack in the corner. From the looks of the icons, it was probably an older version of Ubuntu (8.04 or 10.04).

about 2 months ago
top

EU To Allow 3G and 4G Connections On Planes

photonic The point: hear safety announcements (106 comments)

There are two reasons you have to switch of your electronic devices during takeoff/landing: first, the electronic interference, which is not considered a problem anymore these days. The second, more unknown, reason is that they do not want you to listen to music so that you can hear the safety announcements. I am not talking about the usual 'live-vest is stored under your seat' story that everyone has heard 100 times, but instructions to evacuate in case of real emergencies. Since these emergencies happen mostly during the first and last few minutes of a flight, they want you to pay full attention. Source: close friend is instructor for flight crews.

about 5 months ago
top

SnapChat Turns Down $3 Billion Offer From Facebook

photonic Re:They're ALL on crack. (188 comments)

With $3B at stake, that would be pretty risky poker play for Facebook. If Facebook knows it is a boondoggle, it is likely that SnapChat's owners know it too, so their best action would be to take the money and run.

about 5 months ago
top

SpaceX Falcon 9 Blasts Off From California

photonic Reusable first stage? (97 comments)

I watched the webcast live. The qualification of the upgraded Falcon 9 seemed to have gone very well, with payloads deployed in nominal orbits. They were also supposed to do some first tests for recovering the first stage. The only thing that I could find was that the second of two burns after separation sent it into a spin, after which it crash-landed in the ocean. Anyone has some more news about that?

about 7 months ago
top

Matchstick-Sized Sensor Can Record Your Private Chats Outdoors

photonic This is pretty old technology (90 comments)

I remember seeing a presentation by these guys when they were probably still a recent startup company at Twente University, must have been around 15 years ago. Their sensor is build with MEMS technology and consists of 2 or 3 tiny wires (maybe 1x200 micron) that are suspended over a valley etched out of a silicon wafer. When these wires are heated up, a sideways airflow will cause tiny difference in temperature between the wires that can be read out by measuring the resistance. At the time, their target application was low-cost microphones for use in mobile telephones. IIRC, the sensitivity of this sensor had a sensitivity that rolls off as 1/f inherent to the involved physics and they were struggling with the noise at high frequencies in the reconstructed sound. Looking at their website, the sensor still looks exactly the same. Assuming no major breakthrough (I could imagine they lowered the noise by a factor 10 meanwhile, but not that they solved the 1/f problem), I guess the major change now is that they can do more fancy signal conditioning with a DSP in real time. Too bad they went for the military market, but I guess that is a way to slap a few 10-Euro sensors together and sell them as a 10kEuro package. Does anyone know what could be done with these direction sensitive flow-sensors that cannot be done with a phased-array of conventional microphones?

about 7 months ago
top

What the Insurance Industry Thinks About Climate Change

photonic Re:The insurance message is ... (385 comments)

Only when assuming a free and functioning economy with no collusion between insurance companies.

about 7 months ago
top

The Linux Foundation Releases Annual Linux Development Report

photonic Re:Nobody from Ubuntu (101 comments)

Maybe an even more important point they contributed is a large community. Cannonical took many years to build that up by marketing, providing infrastructure (forums, launchpad) and hand-picking the various pieces software that makes an distribution of things that work well together. This has several advantages: First, more users means more testing, more bug-reports and more people that can help you in a forum. Secondly, a large community means they created a critical mass to pressure hardware vendors to release drivers and companies like skype and adobe to release and maintain linux versions. No matter what they will do (go to slow, go to fast, screw up the odd sound drivers, try to make some money on the side), people will keep bitching about everything they do. I use Ubuntu because I like to bet on the winning horse: I know that my bugs will be fixed quicker if I stay with (one of the few) biggest distributions and I have a bigger chance that my hardware/software is supported. They might be the evil/non-ideal solution for now, but in the short turn it is more important to do make a strong block against Apple/Microsoft then to be as pure as possible. I can always switch to some better distribution later when linux as a whole has achieved world domination.

about 7 months ago
top

Cruise Ship "Costa Concordia" Salvage Attempt To Go Ahead

photonic Re:this has me wondering (151 comments)

The only problem in this case is that it will be impossible to tow the refloated ship to India or some other country where they have a liberal view on labour safety. As far as I know, it will be towed to one of the nearby big harbours (Genua, Livorno or Civitavecchia?). I don't know how they will do the actual dismantling there.

about 7 months ago
top

Android 4.4 Named 'KitKat'

photonic Re:Alphabet (247 comments)

Next versions: Lollypop, M&M/Mars, Nougat, , . Seems that Google's marketing department has already posted this question disguised as a mother.

about 7 months ago
top

How Patent Trolls Stalled a New Transit App

photonic wiki that documents all troll-victims? (85 comments)

This is the millionth time we see a post on Slashdot about people falling victim to a patent troll. If this is not yet done somewhere, someone should really make a wiki to meticulously document all these small cases, so that the next time you talk to a politician, you can show them the real damage of the current patent system.

about 8 months ago
top

Interviews: Guido van Rossum Answers Your Questions

photonic whitespace (169 comments)

I know about all the religious arguments pro or against whitespace as syntax. Personally, I am a happy user of python and I actually like the forced indentation, YMMV. But please slashdot, why do you screw up the indentation when the inventor of a whitespace-as-syntax-language gives a code example? This will be too easy for anyone arguing against the use whitespace of syntax.

about 8 months ago

Submissions

top

Possible collision between cube-satellite and old space junk

photonic photonic writes  |  about a year ago

photonic (584757) writes "The BBC is reporting about a possible collision between Ecuador's first satellite (a small cubesat) and debris from an upper stage of an old Russain rocket. If confirmed, this might be the 3rd case in recent years, after a high-speed collision of an Irridium satellite with a dead Russian satellite in 2009 and a collision earlier this year between a Russian laser reflector (which can be tracked very accurately) and a tiny piece of a debris of a Chinese weather satellite that was destroyed in a missile test."
top

Man extradited to the US after uploading child-pornography to MS SkyDrive

photonic photonic writes  |  about a year ago

photonic (584757) writes "The national Dutch broadcaster reports (Google translate fails due to cookie warning) that a man living in Amsterdam was extradited to the US for the production of child-pornography. The man is a US citizen and the offenses were allegedly committed in the US and other countries, so the extradition seems uncontroversial. The interesting detail is that the man was apparently caught after he uploaded some of the offending files to Microsoft SkyDrive. Are the authorities actively scanning all your files or do they simply give Microsoft (and Dropbox, Google, ...) a list of hashes of known illegal material?"
Link to Original Source
top

NIST releases report on WTC 7 collapse

photonic photonic writes  |  more than 5 years ago

photonic (584757) writes "After a 3 years of study, NIST finally released its report on the collapse of World Trade Center building 7. The main conclusion is that the building came down due to fire, not due to debris damage or some conspiracy demolition team. The fire started pretty small after the collapse of WTC 1, but was left to burn several floors out completely. The important finding is that the collapse was triggered by thermal expansion of beams, which could detach asymmetrically loaded girders from the main columns. Some limited pancaking of floors than caused lack of lateral support and buckling of a single column. This triggered the failure of the entire core of the building, which finally fell down as a single piece. Crackpot theories can be discussed in the Digg comments, so please limit the discussion to the science here. All documents can be found here, which read like a porn magazine for finite element junkies. Awesome movies are here. And yes, they used Beowulf clusters to do the simulations, some of which lasted for several months."
Link to Original Source

Journals

photonic has no journal entries.

Slashdot Account

Need an Account?

Forgot your password?

Don't worry, we never post anything without your permission.

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>
Sign up for Slashdot Newsletters
Create a Slashdot Account

Loading...