Russian billionaire Yuri Milner plans to spend $100 million over the next few years to begin developing the technology needed to build a giant laser array to propel swarms of postage stamp-size spacecraft off on 20-year-long interstellar flights to Alpha Centauri, the nearest star to the sun, the internet investor announced Tuesday.
The tiny 1-gram nanocraft, or “StarChips,” would be equipped with small, ultra-thin light sails and accelerated, one at a time, to 20 percent the speed of light by a powerful half-mile-wide array of ground-based lasers, boosting them to a cruise velocity of some 37,200 miles per second in a few minutes.
From that point on, the tiny spacecraft would sail on their own across the immense 4.3-light-year — 25-trillion-mile — gulf, flying through the Alpha Centauri system about 20 years after launch. Each surviving “spacecraft on a chip” would snap pictures and beam the data back to Earth using tiny on-board lasers, the faint signals arriving four years later.
The G-forces are very high and that would make scaling it up to be a manned starship a huge challenge:
The collimated beam hitting the sail of a nanocraft would accelerate it to cruise velocity in about two minutes, he said, briefly subjecting the craft to 60,000 times the force of Earth’s gravity
When Neil Armstrong landed on the moon in 1969 I expected I would be alive to see colonies on the moon and perhaps even visit the moon myself. That seems very unlikely at this point. But it’s plausible that I will be alive to see the pictures taken from within a million miles from Alpha Centauri. That’s something I didn’t imagine and is a certain amount of consolation.
I think this is politicians, in some ways, using these terrible acts to advance their agendas. If the White House thinks that Twitter can solve their ISIS problem, they’ve got (a lot of problems).
Government back doors to communications violates The Jews in the Attic Test. WhatsApp intent is to keep communication private. This is no small task. I’m certain it is private from your local police force, snoopy neighbors, and most employers. But if a billion people use it that is a very juicy target for nation states. Such a high value target will justify an enormous expenditure of resources to break it. I expect it is only a matter of time before it is broken. But that doesn’t mean that it will stay broken or that gaining access to each conversation isn’t very expensive and cost prohibitive except in extremely important situations.
That said, I have WhatsApp installed on my phone.—Joe]
the only 3D printing systems in the world capable of automatically reinforcing engineering plastics to aluminum levels of performance and beyond, right on your desktop.
Aluminum levels of performance? That probably doesn’t include all parameters and all grades of aluminum but I could imagine it being good enough for a gun barrel accurately shooting hundreds of rounds of low speed, soft lead bullets before needing to be replaced. And if the gun was made correctly replacing the barrel could be quick and easy.
Powder: 3.9 grains of Bullseye
Primer: WSP
OAL: 1.132
10 shots over the chronograph from 10 feet away.
Minimum velocity: 814 fps
Maximum velocity: 864 fps
Mean velocity: 838.1 fps
Standard deviation: 15.5 fps
Power Factor: 150.86
The water filled milk jug test was to determine if the bullets would expand at this relatively low velocity. The 0.401 bullet expanded to just under 0.6 and retained nearly 99% of it’s mass:
This is very good.
Brother Doug was a little worried that with the lower velocity perhaps a non-expanding bullet would be better for self defense because of the better penetration. Would it penetrate deep enough to “do the job”? I didn’t have any ordinance gelatin but my guess is that it penetrates just fine. They fully traversed three one gallon milk jugs filled with water. This is just under 18 inches of water.
I didn’t expect it would penetrate that far and for my first shot I only used two jugs for depth and put one on each side of the rear jug in case the bullet didn’t go straight after hitting the first jug:
It fully penetrated the two jugs and I was unable to find the bullet in the berm.
The second time I changed the configuration to just three jugs lined up in a row:
Again the bullet penetrated all the jugs but I found the bullet just sitting on the ground behind the jugs.
You do not examine legislation in the light of the benefits it will convey if properly administered, but in the light of the wrongs it would do and the harms it would cause if improperly administered.
The problem being that it is difficult for many people to see the “unintended consequences” in foresight. If there is the possibility of a good outcome they will focus on that. In a lot of ways it’s like gun control. “People might be safer if guns are banned because the bad guys won’t have guns to commit crimes with.” Overlooking that the good guys won’t have guns to defend against the bad guys with.
The gun control analogy is an even a better fit when you remember that at one time the U.S. government insisted encryption was a “munition” and was mostly banned from export. It would seem to me that if the Second Amendment were well respected by Congress and the courts then a good lawyer could make the case government resistant encryption is protected by the Second Amendment as much or more so than it is by the First Amendment.—Joe]
As I mentioned a couple times before Speer makes a self-defense bullet intended for lower velocity loadings. They call it “Gold Dot® Short Barrel®”. I needed these for handgun students with difficulty handling factory loads. I loaded 301 rounds (I purchased three 100 round boxes and ended up with 301 bullets) over 3.9 grains of Bullseye and delivered 100 rounds to one of my students last Saturday.
Here is what the 180 grain bullets look like in .40 S&W:
I’m expecting a velocity of about 850 fps at the muzzle with my STI DVC (5 inch barrel). This compares to about 1025 fps with 180 grain Winchester Rangers out of the same gun. The difference in recoil is significant.
I’ll run them over a chronograph and do some water jug testing (only valid for simple expansion testing) the first chance I get.
The U.S. government has asked us for something we simply do not have, and something we consider too dangerous to create. They have asked us to build a backdoor to the iPhone.
Specifically, the FBI wants us to make a new version of the iPhone operating system, circumventing several important security features, and install it on an iPhone recovered during the investigation. In the wrong hands, this software — which does not exist today — would have the potential to unlock any iPhone in someone’s physical possession.
The FBI may use different words to describe this tool, but make no mistake: Building a version of iOS that bypasses security in this way would undeniably create a backdoor. And while the government may argue that its use would be limited to this case, there is no way to guarantee such control.
The battery is new and that is all it took to make it functional. It’s a code practice oscillator that Brother Doug and/or I built back in the late 60’s or early 70’s. Once upon a time we put in a half-hearted effort to learn Morse Code but neither of us succeeded at learning the skill.
Scientists announced Thursday that, after decades of effort, they have succeeded in detecting gravitational waves from the violent merging of two black holes in deep space. The detection was hailed as a triumph for a controversial, exquisitely crafted, billion-dollar physics experiment and as confirmation of a key prediction of Albert Einstein’s General Theory of Relativity.
It will also inaugurate a new era of astronomy in which gravitational waves are tools for studying the most mysterious and exotic objects in the universe, scientists declared at a euphoric news briefing at the National Press Club in Washington.
…
“Ladies and gentlemen, we have detected gravitational waves. We did it!” declared David Reitze, the executive director of the Laser Interferometer Gravitational-wave Observatory (LIGO), drawing applause from an audience that included many of the luminaries of the physics world. The briefing was watched around the world by physicists who have long waited for such a detection.
I’m hoping this will lead to the development of “warp drive”.
Presidential involvement in small arms has been strategic and game-changing in our history. Obama comes along and tells the Army that, in this administration, money is going into small arms to build — not a deadly weapon, not an effective weapon, not a dominant weapon, not a lifesaving weapon, not a technological cutting-edge weapon — but a weapon that prevents accidental discharge. Give me a break.
NSA tiger teams follow a six-stage process when attempting to crack a target, he explained. These are reconnaissance, initial exploitation, establish persistence, install tools, move laterally, and then collect, exfiltrate and exploit the data.
During the reconnaissance phase agents examine a network electronically and, in some cases, physically. They work out who the key personnel are, what email accounts matter, how far the network extends, and maintain constant surveillance until they can find a way in.
Whenever someone tells me to “check my privilege”, I like to respond with “root access confirmed”.
Brian Garrett January 21, 2016 Comment to Indistinguishable from Reality [To understand this, and find it absolutely hilarious, it helps to be a computer geek.—Joe]
a number of other companies are also working on lasers that might be suitable for use on the AC-130. Lockheed Martin, the aircraft’s manufacturer, is developing a 60-kilowatt-class laser for the Army, for example, and Northrop has advertised its interest in developing airborne lasers as well. AFSOC has studies under way to determine the best solution.
And they are getting small enough to put on a small truck:
General Atomics has developed another version that fits in a box 12 feet long, 4 feet wide and 2 feet tall.
60 kW is a lot of punch. A six inch diameter magnifying glass collects about 15 W (1/4000th of the power of the laser) and quickly fries an ant.
And these are going to get smaller too. A 1 kW laser rifle would seem to be plausible and useful for some tasks.
What if someone created a computer virus which illegally infected as many systems as it could via the Internet and made them more secure against attacks by unauthorized users?
The further we dug into Wifatch’s code the more we had the feeling that there was something unusual about this threat. For all intents and purposes, it appeared like the author was trying to secure infected devices instead of using them for malicious activities.
Wifatch’s code does not ship any payloads used for malicious activities, such as carrying out DDoS attacks, in fact all the hardcoded routines seem to have been implemented in order to harden compromised devices. We’ve been monitoring Wifatch’s peer-to-peer network for a number of months and have yet to observe any malicious actions being carried out through it.
In addition, there are some other things that seem to hint that the threat’s intentions may differ from traditional malware.
Interesting.
But what you have to wonder is, why didn’t the software writers for these devices (these are embedded systems for the “Internet of Things”) include the capability for automatic updates and eliminate the need for some “vigilante” to do it for them?
What people can do with what they buy at the gun store doesn’t bother me much. It’s what the brilliant molecular biologist who has gone sideways can do in his basement in mayonnaise jars that absolutely terrifies me.
Brett Peppe
December 22, 2015
[I have nothing to add.—Joe]
A rocket with landing gear. We saw that in books and SciFi movies all our lives. Never thought it would take this long, but apparently it’s difficult.
Better book yourself a flight. You get four minutes of free-fall, and the best “roller coaster” ride yet. Once they can go orbital it’ll cost more for a ticket I bet.
I have recently come to the conclusion that e-mail is fundamentally unsecurable. The things we want out of e-mail, and an e-mail system, are not readily compatible with encryption.
Bruce Schneier November 12, 2015 Testing the Usability of PGP Encryption Tools [Interesting observation. I tried to do encrypted email with some other people for a while and it didn’t last long. Things like searching for an old email was impossible. And the subject of the email was never encrypted so you would either leak a lot of information with the subject or you could decrypt just the one email you wanted to look at again.—Joe]