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Mystery Intergalactic Radio Bursts Detected

Gil-galad55 Re:Gravitational lensing (259 comments)

Gravitational lensing produces small (arcsecond) deviations. These things are only localized to arcminute scale, so graviational lensing is negligible.

about a year and a half ago

Ask Slashdot: How To Stay Fit In the Office?

Gil-galad55 Re:Simple exercises (372 comments)

I can't agree with this enough, especially the pushups. I've been doing ~10 high-rep pushups sets as part of workout I do a few times a week. (I started with the program at hundredpushups.com, but now I roll my own based on the terminal workout.) I alternate sets of pushups with sets of (weightless) squats, roughly 30.

Especially at higher reps, these are *plenty* to get your heart rate up, so you get in your cardio. High-rep pushups sets are essentially a plank position held fr >30s, so you get some core. Pushups & squats hit nearly as many muscles as possible for the time spent, so this will also give you a good base if you decide to hit up a gym at some point.

about 2 years ago

Astronomers Discover a Group of Quasars 4 Billion Light Years Across

Gil-galad55 Re:The Cosmological principle will still hold. (106 comments)

Thanks for your armchair dismissal of many life works. Fwiw, I'm an astrophysicist and I'll take the time to correct one point. Supermassive black holes weigh in around 10^9 solar masses. Galaxy masses are >10^12 solar masses. Furthermore, when accreting at the maximum (Eddington) rate, black holes grow exponentially. It's not difficult to grow a 10^9 solar mass black hole in 10^9 years. Really the only hard part is getting the gas close enough to the BH to accrete; this problem and the hierarchical merger of black holes are active research areas.

about 2 years ago

Chromebook Takes Top Place In Laptop Sales On Amazon

Gil-galad55 Re:Great system for parents (372 comments)

I have CAPSLOCK mapped to ESC, which makes switching modes in vim/pentadactyl much easier on the fingers. (Especially on my ThinkPad, where the ESC is up in Ultima Thule.)

about 2 years ago

After Android Trial, Google Demands $4M From Oracle

Gil-galad55 Re:WTF (119 comments)

It's more correct to say it's an indeterminate form, and what it evaluates to depends on what's under your infinity's hood. Two examples:

lim x--> inf of x/x is "infinity/infinity" and evaluates to 1.

lim x--> inf of e^x/x is also "infinity/infinity" but evaluates to infinity.

more than 2 years ago

Leap Second Bug Causes Crashes

Gil-galad55 Re:All of my servers were fine (230 comments)

They lost commercial power due the big storm system that went through the DC area.

more than 2 years ago

New Class of Pulsars Discovered

Gil-galad55 Re:So, does this imply anything special? (93 comments)

Well, there is clearly enough circumstellar (circumpulsar?) material to generate the pulsar wind nebula detected in X-rays, but as with all collisionless shocks, this material must be tenuous.

more than 6 years ago


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