Forgot your password?
typodupeerror

Comment: Newer LED lights known to cause interference (Score 2) 158

by PassMark (#46208113) Attached to: L.A. Building's Lights Interfere With Cellular Network, FCC Says

After a bunch of anecdotal reports we did some measurements of radio interference caused by LED lighting (and the power supplies included in these globes).

Most were OK, but there are a bunch that spray out a large amount of broad band interference. Some spectrum graphs are here showing a few lights in their on and off states.
http://www.ledbenchmark.com/fa...

Interference was seen in the digital radio bands, FM radio, DAB bands, everywhere really. So the only thing surprising about this post is the lack of publicity the problem has been given to date.

Comment: Summary is wrong (Score 2) 218

by PassMark (#44838129) Attached to: It's Official: Voyager 1 Is an Interstellar Probe

Summary appears to be wrong.
"...were able to deduce that Voyager was traveling through a less dense medium — i.e. interstellar space."

Interstellar space is apparently 40 times more dense than space in the solar system. The solar wind pushes the particles back to the edge of the solar system, making the plasma more dense at the edge (not less dense).

To quote from NASA
http://www.jpl.nasa.gov/news/news.php?release=2013-277
"Voyager 1's plasma wave instrument detected the movement. The pitch of the oscillations helped scientists determine the density of the plasma. The particular oscillations meant the spacecraft was bathed in plasma more than 40 times denser than what they had encountered in the outer layer of the heliosphere. Density of this sort is to be expected in interstellar space."

+ - NASA: Voyager-1 has not yet left the solar system->

Submitted by skade88
skade88 (1750548) writes "From the JPL's Voyager's team blog: "The Voyager team is aware of reports today that NASA's Voyager 1 has left the solar system," said Edward Stone, Voyager project scientist based at the California Institute of Technology, Pasadena, Calif. "It is the consensus of the Voyager science team that Voyager 1 has not yet left the solar system or reached interstellar space. In December 2012, the Voyager science team reported that Voyager 1 is within a new region called 'the magnetic highway' where energetic particles changed dramatically. A change in the direction of the magnetic field is the last critical indicator of reaching interstellar space and that change of direction has not yet been observed."

To learn more about the current status of the Voyager mission, visit: http://www.jpl.nasa.gov/news/news.php?release=2012-381

The Voyager spacecraft were built and continue to be operated by NASA's Jet Propulsion Laboratory, in Pasadena, Calif. Caltech manages JPL for NASA. The Voyager missions are a part of NASA's Heliophysics System Observatory, sponsored by the Heliophysics Division of the Science Mission Directorate at NASA Headquarters in Washington."

Link to Original Source

Comment: Surprisingly poor quality images (Score 1) 42

by PassMark (#39448119) Attached to: Elementary School Kids Explore the Moon At Close Range

I don't get it.
Why spend $375 million sending a camera to the moon only to return such poor quality images?

I looked a dozens of them, they all seem small, grainy, out of focus and black and white. (of course the moon being mostly grey might explain this last point)

Couldn't they afford a better camera? My smartphone would have done a better job.

Apple Orders 10 Million Tablets? 221

Posted by ScuttleMonkey
from the pricepoint-better-be-right dept.
Arvisp writes "According to a blog post by former Google China president Kai-Fu Lee, Apple plans to produce nearly 10 million tablets in the still-unannounced product's first year. If Lee's blog post is to be believed, Apple plans to sell nearly twice as many tablets as it did iPhones in the product's first year."

Comment: Real numbers and graphs (Score 1) 752

by PassMark (#30508040) Attached to: The Environmental Impact of PHP Compared To C++ On Facebook

We have done the actual benchmarks, and the original post matches our experience.
PHP gives processing times of around 1 second (for a search function) and C++ code via a CGI gaves times of 0.1 sec. A ten times improvement.

Graphs and numbers are here,
http://www.wrensoft.com/zoom/benchmarks.html

Further when we switched to FastCGI we saw another 5 fold improvement, after optimising the code for FastCGI.

So I would believe a 50 folder improvement should be possible by going from PHP to FastCGI (and rewriting code to suit a FastCGI)

Image

Dad Delivers Baby Using Wiki 249

Posted by samzenpus
from the 9cm-edited dept.
sonamchauhan writes "A Londoner helped his wife deliver their baby by Googling 'how to deliver a baby' on his mobile phone. From the article: 'Today proud Mr Smith said: "The midwife had checked Emma earlier in the day but contractions started up again at about 8pm so we called the midwife to come back. But then everything happened so quickly I realized Emma was going to give birth. I wasn't sure what I was going to do so I just looked up the instructions on the internet using my BlackBerry."'"
Science

Aussie Scientists Find Coconut-Carrying Octopus 205

Posted by timothy
from the concealed-carry-in-australian-waters dept.
An anonymous reader writes with this excerpt from an AP report: "Australian scientists have discovered an octopus in Indonesia that collects coconut shells for shelter — unusually sophisticated behavior that the researchers believe is the first evidence of tool use in an invertebrate animal. The scientists filmed the veined octopus, Amphioctopus marginatus, selecting halved coconut shells from the sea floor, emptying them out, carrying them under their bodies up to 65 feet (20 meters), and assembling two shells together to make a spherical hiding spot. ... 'I was gobsmacked,' said Finn, a research biologist at the museum who specializes in cephalopods. 'I mean, I've seen a lot of octopuses hiding in shells, but I've never seen one that grabs it up and jogs across the sea floor. I was trying hard not to laugh.'"

Comment: Zoom Search is another option - But don't crawl (Score 1) 232

by PassMark (#29804787) Attached to: What Desktop Search Engine For a Shared Volume?

We are the developers of the Zoom search engine.
http://www.wrensoft.com/zoom/

We have spent some time recently looking at the problem if indexing large amounts of data, for see,
http://www.wrensoft.com/zoom/support/faq_large_sites.html

Many people above have recommended using external appliances, or external hardware. This doesn't make sense in our opinion. Using an external indexer that crawls your files means that 1) You are loading up your network, 2) You are limited to network bandwidth speeds (rather than SATA or SCSI data transfer speeds) 3) You have the overhead of the HTTP protocol.

What makes sense is to run the indexer on the server that is hosting the files and index them directly off the disk. Don't spider them, and don't do it across a network. This can save you many days of indexing time.

But with this much data, I don't think there is any really quick solution. Whatever you decide to do is going to take some setup effort.

Earth

+ - Periodic table gets a new, unnamed element-> 2

Submitted by koavf
koavf (1099649) writes "More than a decade after experiments first produced a single atom of "super-heavy" element 112, a team of German scientists has been credited with its discovery, but it has yet to be named. The International Union of Pure and Applied Chemistry has temporarily named the element ununbium, as "ununbi" means "one one two" in Latin; but the team now has the task of proposing its official name."
Link to Original Source

Comment: Firefox beat Chrome in real world Javascript app (Score 1) 807

by PassMark (#24869247) Attached to: Google Chrome, the Google Browser
As pointed out in this New benchmark Chrome doesn't perform so well when using an independent benchmark. One of the most popular and commonly used test suite is SunSpider. It is worth noting that this is developed by the WebKit team (WebKit being the rendering engine in Safari and now, Google Chrome). So the benchmark being used was created by the developers of the JS engine. So it is hardly surprising that they do well in their own benchmark.

Assembly language experience is [important] for the maturity and understanding of how computers work that it provides. -- D. Gries

Working...