Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror

Comment: Re:KDBus - another systemd brick on the wall (Score 2) 232

by Drumhellar (#49562269) Attached to: Linux 4.1 Bringing Many Changes, But No KDBUS
Windows tracks USB devices by serial number, so you can have settings for a specific device persist. However, device serial numbers are an optional part of the USB spec, and in the absence of serial numbers, it tracks devices by connection. This allows you to have multiple identical devices with different configuration settings. If it didn't track devices without serial numbers by connection, it would create issues when, say, the devices aren't plugged in in the same order, and the wrong settings get applied to the wrong device, or when the computer boots, the devices aren't necessarily enumerated in the same order each time, so the wrong settings would be applied to the wrong devices. So, when you plug in a device that has been plugged into other ports, and Windows treats it as a new device, it is because it lacks a serial number. It is less than ideal, but the alternatives are worse.

Comment: Re:I'm a hypocrite (Score 2) 133

by Drumhellar (#49351349) Attached to: GAO Denied Access To Webb Telescope Workers By Northrop Grumman
These wouldn't be a very useful replacement for JWT. The JWT's 6.5m mirror is much larger than the NRO satellite's 2.4m mirror - giving it vastly superior light gathering capabilities and resolution. Even if interferometry were used with the pair, it only increases resolution, not light gathering capability. The NRO satellites are also wider angle, able to view an area 100x larger, making it good for survey work, but not planet hunting, and certainly not observing distant galaxies. They only view in the near infrared, as they lack hardware for cooling. JWT, on the other hand, can capture from long-visible to mid-infrared - that's what the cool looking sun shield is for, to have a mission length not limited by the amount of helium it can carry on board for cooling. So, no, we won't be looking anywhere near as far back in time as JWT with these - however, they will be eventually used, but just not before 2020, and for a mission with zero overlap of JWT.

Comment: Re:Are Brown Dwarfs Stars? (Score 1) 98

by Drumhellar (#49251805) Attached to: Proxima Centauri Might Not Be the Closest Star To Earth
In a star like the Sun, Hydrogen burns into Helium, with Deuterium being a step along the proton-proton chain. When All the Hydrogen in the core is used up, the core contracts, and gets extremely hot. The layers outside of the core also contract, and a shell of hydrogen around the non-burning helium core begins to burn. The helium produced here sinks to the core, adding heat and mass. The added mass causes further contraction, and eventually the helium core starts burning, turning into carbon via the triple-alpha process. Eventually, the helium runs out, the core contracts again, a hydrogen shell starts burning, helium sinks to a shell around the carbon core, the hydrogen shell stops burning, contracts, another hydrogen shell starts burning, producing helium, which sinks to the helium layer, which eventually gets hot enough to start burning, producing carbon, which sinks to the carbon core, heating it up and causing it to contract from the added mass, which heats it up more, eventually getting hot enough for the Carbon-Nitrogen-Oxygen cycle to begin. This is what happens to a main-sequence star after it leaves the main sequence. Large stars do this in repeated steps and repeated layers, all the way up to iron, though when iron forms, disaster happens. During this repeated process of shell burning, the star will repeatedly shrink and contract over the scale of a few million years, losing mass in the process. For a star the mass of our Sun, the process will stop at Oxygen (I think). At this point, (and, once the various shells stop burning), the last of the outer layers float off into space, the core contracts, and fusion stops. This is a white dwarf. No fusion goes on - it's just a hot ball of degenerate gas (In the case of our Sun, a hot ball of mostly Oxygen). At this point, there isn't much in the way of gravitational contraction, glowing only from black body radiation. Just for fun, there are certain masses where this recurring balancing act of shell-core-shell-core burning doesn't work, and the star blows up - for example, when helium burning begins but there isn't enough mass external to the core to exert an inward pressure on the core, the helium core can blow itself apart.

Comment: Eww.. (Score 2) 266

Here in Sacramento, I saw somebody from the county water district using dousing rods while on the job. I'm not sure if he was looking for a pipe or what, and I was sadly too preoccupied to inquire with the water district to see if it's standard procedure, but, shit. I felt bad for my county.

Comment: Re:Very genetically linked (Score 1) 267

by Drumhellar (#47620713) Attached to: My degree of colorblindness:
R-G colorblindness is inherited from the maternal grandfather. My dad and all four of his brothers were various levels of r-g colorblind (usually horribly), as was their maternal grandfather. Only one of my uncles has any daughters (5 daughters), but I don't know if any of their sons are colorblind or not.

Comment: Written Agreements not mandatory? (Score 1) 196

by Drumhellar (#42575729) Attached to: Warner Bros Secures Commercial Control of Superman
I thought contract law made written agreements mandatory for anything over a certain value. I seem to remember my high school teacher saying that (at least in California) that anything over $200 REQUIRED the contract be on paper. Am I mistaken? Of course, this particular suit was in Federal court, so that wouldn't apply.
Privacy

Biometric IDs For Every Indian Citizen 166

Posted by samzenpus
from the one-card-to-rule-them dept.
wiedzmin writes "This month, officials from the Unique Identification Authority of India (UIDAI), armed with fingerprinting machines, iris scanners and cameras hooked to laptops, will fan out across the towns and villages of southern Andhra Pradesh state in the first phase of the project whose aim is to give every Indian a lifelong Unique ID (UID) number for 'anytime, anywhere' biometric authentication. While enrolling with the UIDAI may be voluntary, other agencies and service providers might require a UID number in order to transact business. Usha Ramanathan, a prominent legal expert who is attached to the Center for the Study of Developing Societies in the national capital, said that, 'taken to its logical limit, the UID project will make it impossible, in a couple of years, for an ordinary citizen to undertake a simple task such as traveling within the country without a UID number.' Next step, tying that UID number and biometric information to to their RIM BlackBerry PIN number."

In order to dial out, it is necessary to broaden one's dimension.

Working...