jloughry

9 ms·

1.
by jloughry 7y ago
That exists: look for 'trusted path'. It was a feature of compartmented mode workstation (CMW) operating systems like Trusted Solaris and lives on in the requirement to use Ctrl-Alt-Del to call up the Windows login prompt. In Trus
2.
by jloughry 7y ago
Also, you don't want to breathe it; xenon is an anesthetic gas and will put you to sleep.
3.
by jloughry 7y ago
This is one global-scale geoengineering project I can rally get behind. It has the smallest chance of catastrophic second-order effects of any of the several methods I've heard of.
4.
by jloughry 7y ago
Mother's maiden name is documented to have been in use for authentication at least as far back as 1882, and even then it was known to be a weakness [1, §3]. [1] Stephen M. Bellovin. 'Frank Miller: Inventor of the One-Time Pad&#x27
5.
by jloughry 8y ago
It could be a 12V AC adapter. Not too common, but they do exist. Four of the myriad diodes would be connected in a bridge rectifier to convert the AC to DC. (I don't see any smoothing capacitors though....) Depending on how creative
6.
by jloughry 8y ago
Build one near the Equator.
7.
by jloughry 8y ago
Yes: Interestingly, the audio chipsets in modern motherboards and sound cards include an option to change the function of an audio port at the software level, a type of audio port programming sometimes referred to as ’jack retasking’. This
8.
by jloughry 8y ago
Lightsail. You carry a laser and a lightsail. You shoot the laser at the black hole and the laser light gravitationally slingshots around the black hole, returning to you with more energy than you gave the laser. The returning laser light p
9.
by jloughry 8y ago
https://en.wikipedia.org/wiki/STS-36 It was an experiment to test radiation effects; the In-flight Radiation Dose Distribution (IDRD) experiment: This joint NASA/DoD experiment was designed to examine the penetra
10.
by jloughry 8y ago
Here's the most recent article I've seen: https://www.designworldonline.com/energy-efficient-lighting-... Near the end of the article is a diagram of the new SDL (Dr. Shuji Nakamura's new company) laser diode
11.
by jloughry 8y ago
From The Martian by Andy Weir: "They say once you grow crops somewhere, you have officially 'colonized' it. So technically, I colonized Mars."
12.
by jloughry 8y ago
The laser doesn't illuminate the road directly; it excites a phosphor puck that lights up white and is then focused and aimed like a regular incandescent filament or gas discharge arc. Just like white LEDs, only much more efficient.
13.
by jloughry 8y ago
TIL tetrode has a special meaning in biology: a four-conductor microelectrode for probing neurons that gives essentially a direction reading along with amplitudes from each of the four electrode components.
14.
by jloughry 8y ago
This seems to be relevant: https://fas.org/man/dod-101/sys/ship/docs/DDG51_04-97.htm
15.
by jloughry 8y ago
That hardware capability is exploited in the following paper, if you want to know the details: Mordechai Guri et al. (2016) 'SPEAKE(a)R: Turn Speakers to Microphones for Fun and Profit'. http://cyber.bgu.ac.il/adva
16.
by jloughry 8y ago
You're right. Those people weren't working on a software project; they were in a fight for their lives—literally—with an enemy they just barely won against. It's not the same thing at all. But it is worth watching for the dep
17.
by jloughry 8y ago
Twelve O'Clock High is a masterclass on running a software project. The higher-ups can see that something is wrong with the team; it's not performing as well as it ought to. The outsider comes in, figures out what the problems a
18.
by jloughry 8y ago
George O. Smith's Venus Equilateral stories from 1942–1945 are wonderful—if you like the idea of vacuum tube technology taken to extreme lengths. Lots of fun in those stories for engineers and hackers: spaceships that can accelerate
19.
by jloughry 8y ago
This company sells new S-100 boards! http://www.s100computers.com/Cards%20For%20Sale.htm They have a Z-80 board. Lots of information about it here: http://www.s100computers.com/My%20System%20Pages/Z80%2
20.
by jloughry 8y ago
From chaper 3 of Marketing That Works: How Entrepreneurial Marketing Can Add Sustainable Value to Any Sized Company by Lodish et al. (Upper Saddle River, New Jersey: Pearson Education, 2007) Many colleges and some upper socioeconomic h
21.
by jloughry 8y ago
The paper is open-access at ACM: https://dl.acm.org/citation.cfm?id=3192369 That's really appreciated; thanks.
22.
by jloughry 8y ago
Computer science. I worked for Lockheed for fifteen years---long enough to see some programming projects succeed and others fail. I wondered why the difference. I had access to all the project records, and Lockheed was cool with it, so I to
23.
by jloughry 8y ago
I was doing a full-time PhD and working. One day my advisor asked, `Are you working for me or Lockheed?' I chose the PhD.
24.
Towards Inferring Mechanical Lock Combinations Using Wrist-Wearables(arxiv.org)
36 points by jloughry 8y ago|7 comments
25.
by jloughry 8y ago
See https://en.wikipedia.org/wiki/1-Wire "One distinctive feature of the bus is the possibility of using only two wires: data and ground. To accomplish this, 1-Wire devices include an 800 pF capacitor to store cha
26.
by jloughry 8y ago
Look at old battleship rangefinders. Some of them had 8 or 9 metre baselines. See https://en.wikipedia.org/wiki/Coincidence_rangefinder#Stereo...
27.
by jloughry 8y ago
Found it: it was called an ectascope and there are diagrams here: https://www.minnpost.com/stroll/2015/09/seven-stories-down-u... Not a very good photo of what it looked like: http://blogimg.goo.
28.
by jloughry 8y ago
I recall reading something about periscope windows years ago in a book about the University of Minnesota's centre for underground buildings. It was said that looking through the periscope window from underground resembled watching a li
29.
by jloughry 8y ago
* e.g. scaling symbols based on their context and nesting level, just like we do in math equations* That's a great idea. I can see it working in other languages as well, e.g., what Guy Steele and others were trying to do in Fortress.
30.
by jloughry 8y ago
Sure. Any incidental effect related to the actual physics used to encode information potentially could leak information. Fluid has mass, and accelerations require forces, so acoustic, acceleration, and thermal side channels are all a possib

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