Catch up on stories from the past week (and beyond) at the Slashdot story archive


Forgot your password?
Get HideMyAss! VPN, PC Mag's Top 10 VPNs of 2016 for 55% off for a Limited Time ×

Comment OK, so what do I do now (Score 2) 241

I have helped develop a low budget site using coldfusion, as an unpaid volunteer. There is a lot of M$SQL too. I'm neither a security expert or a Coldfusion expert. There are other developers who are more experienced, but there has never been a security audit. I would be interested in the tool(s) used in the study, to scan our site for security issues. Are those tools or similar tools easily available (remember - low budget).

Submission + - B-Mode CMB Polarization is Due to Cosmological Influences 1

lightperson writes: Previously, project BICEP2 announced CMB polarization as evidence of inflation at the beginning of the big bang. Later the BICEP2 team back-pedaled on that claim due to the possibility that the presence of dust in our galaxy skewed their results. Now the POLARBEAR team of measurements of B-Mode polarization of the CMB, concluding that the polarization is due to cosmological influences However, no mention of inflation as an influence was made.

From the article:

Cosmologists have made the most sensitive and precise measurements yet of the polarization of the cosmic microwave background... "It's a really important milestone," said Kam Arnold, the corresponding author of the report who has been working on the instrument for a decade. "We're in a new regime of more powerful, precision cosmology." Arnold is a research scientist at UC San Diego's Center for Astrophysics and Space Sciences and part of the cosmology group led by physics professor Brian Keating... Dust in our own galaxy also emits polarized radiation like the CMB and has influenced other measurements. But these patches are relatively clean, Arnold says. And variations in the CMB polarization due to dust occur on so broad a scale that they do not significantly influence the finer resolution B-modes in this report. "We are confident that these B-modes are cosmological rather than galactic in origin," Arnold said.

Comment In a monastery (Score 2) 310

Was working on some avionics software. Decided to take a sabbatical for spiritual growth. Finished the software remotely. Its flying on many commercial aircraft now. Part of the work involved a shared memory analysis program to ensure that the many tasks behaved - written in VAX DCL. Fixed bugs in website scripts on a "smart" mp3 player.

Comment Re:TCAS? (Score 1) 148

Currently TCAS is an active aircraft detection system - it has to send out signals and get replies from other aircraft's transponders (Mode C or Mode S). Then it figures out where they are. It can figure out avoidance maneuvers, for itself, and coordinate those maneuvers with other TCAS equipped aircraft. It's very expensive and heavy. At one time there was talk about having TCAS passively listening to ADSB replies, containing accurate location information, from Mode S transponders on other aircraft. The FAA is actively pursuing making all transponders use ADSB by 2020. When that happens it will be possible to build a small receiver with the TCAS logic that can help the drone avoid collisions with ADSB broadcasting aircraft. The same kind of receiver can be built inexpensively for small aircraft owners. Small aircraft owners may resist having to buy a new transponder (broadcasting ADSB) for their planes, though.

Comment Re:They need to stop this fast... (Score 1) 295

I don't believe that any tritium needs to migrate out of the glowsticks or anything else where the tritium (hydrogen)is bound into a stable compound. Perhaps Lithium Hydride is stable enough, or perhaps some other compound. Calcium Hydroxide? There are probably 100s of stable minerals, containing hydrogen, exposed to the air that don't decompose to let go of the hydrogen.

Comment Re:Question (Score 1) 759

You are forgetting that code ages overtime. I think it has something to do with the proteins and atoms. That is why they have to make new versions.

Actually, it's telomeres, strings of non-coding characters at the ends of programs or parts of programs. Each time a program is used, but mostly when it is copied some of the non-coding characters are lost. That's fine until it's used up. Then actual code is lost and the software starts to misbehave. This process guarantees that software ages and dies, ensuring profits for the designers of future iterations. This process works so well that the original designers of biological forms on this planet used the same process, adding strings of non-coding DNA to the ends of chromosomes. The even called them telomeres. Molecular biologists are trying to add telomers to the shortening ends with something called telomerase. Microsoft is bribing and suing them to stop their work.

Slashdot Top Deals

Never invest your money in anything that eats or needs repainting. -- Billy Rose