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Bill Broadley
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Just got the dreaded ban email. My best guess is that it has something to do with Google FI (maybe multiple carrier towers confuses things), a Pixel XL, or maybe the GPS Status utility I was running.

I was using https://play.google.com/store/apps/details?id=com.eclipsim.gpsstatus2

Said app doesn't spoof, just allows you to monitor the health/status of the GPS.

My phone isn't even rooted, let alone trying to spoof.

I appealed, here's hoping.


I noticed chromebooks going rapidly up market. Intel Core i5, and i7's. Aluminum unibody construction, larger screens, and over $1k price tags. The screens are getting larger (14 and 15" becoming more common), as well as much higher resolution like the HP Chromebook 13 (3200x1800) and Chromebook pixel (2560x1700).

Adding more ram and CPU makes sense with the coming flood of android apps to make good use of the resources. After all top of the range phones now often have 4GB ram, quad core CPUs, 128GB of storage, and 2560x1440 resolution. Certainly if you want to run 1 or more android apps you'll need a fair bit of resources.

My question is, where are the GPUs? Best I could find even in the $1300 (Google pixel) to $2000 ( HP Chromebook 13 with i7 + 16GB ram) range is a rather poor performance (especially with 4.3M to 5.7M pixel screens)? The HD5500 (broadwell) and HD515 or HD520 are rather poor for that price range and number of pixels.

Anyone seen a chromebook with the Intel Iris HD540 or better?

With chromebooks going from web only to the wide range of android apps certainly seems like at least a mid range embedded GPU would be justified.


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A doctor recommended Denali tried a new inhaler sample and handed her a small box.  Turns out the cardboard box included the inhaler and a computer with a nice display that played a several minute video giving detailed instructions on it's use.  Screen and audio quality was actually quite good.  I found it pretty suprising that packaging + instructions can now include incidental computers.
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2015-05-30
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E5-2630v3 (haswell) latency for 1-8 cores.

Was thinking about the uncanny valley discussed at http://bad-concurrency.blogspot.com/2014/12/the-uncanny-valley-of-l3-cache.html.
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Memory bandwidth and parallelism for a dual socket E5-2630 v3 + DDR4 memory
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I've often wondered if things past the event horizon of a black hole could be recovered.... by 1 or more larger black holes.  Seemed plausible since the gravitational forces of two bodies (even black holes) cancels out at the L1 Lagrange point.

However after writing a small simulation I now understand why it doesn't work.  

The shades of gray represent the escape velocity required.  It's black past the event horizon where the escape velocity is faster than than light.   

Click on the photo for a much better animation.

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Bill Broadley commented on a post on Blogger.
Having commuted from Penn Hills to the Oakland area daily for over 5 years I hear ya.  A few tips:
* tire traction in rain is all about how soft the tire is and has nothing to do with treads.  I used to regularly race at the Pittsburgh Zoo every Wednesday night on complete slicks and the wetter it was the better my chances of winning a race.  At 60-100 psi (which a good commuter tire should be) your contact patch is smaller than the one on your car tires.  Bikes in general can't hydroplane.  Even completely bald tires in heavy rain do fine at commuting speeds (10-25mph).
* Assuming motorist can't see you is a good policy.   Cars, especially in the PIttsburgh area, are bike oblivious to downright aggressive.
* Even heavy snow isn't particularly dangerous on bikes, I would of course recommend treads.  I even biked on the few days that UPitt was closed because the snow was so bad the city asked the campus so shut down and save power.  Even had the amusing experience of a person in a car yelling at me that I was insane... from a car stuck in the snow.  I of course asked who was stuck.... they laughed.
* Don't skimp on clothes, bike, and in particular tires and brakes.  Not that your clothes have to be expensive gore-tex.  When it's wet and cold even cheap rain gear works fine, even if it doesn't breath well.  Layers and zippers are key.  If it's cold out and you aren't cold to start with you are over dressed.
* Ice, especially black is tricky.  Mountain bikes help, wider tires help, but the only thing that really gets any traction on ice is studded tires, which are available.  I did without, I did occasionally low side on glare ice, but fortunately I was dressed pretty heavy and it was just embarrassing.  I did avoid mixing it up with cars in such conditions though and would use side streets, sidewalks, or whatever to avoid falling under a car.
* Pittsburgh does get dangerously cold at times, one night I was biking late and it was -23F!  The grease in my cables froze and when I tried to shift the cable casing split and the cable popped out.  So much for hurrying to get home.  
* Maybe I am insane, but with the right gear I love biking in the snow/rain.  It's a bummer as you are getting wetter, but once at maximum it's fun.  Of course people think you are insane when you are specifically targeting the largest puddles.
* When slippery I'd often drag your rear brake until it skids, it's nice to know exactly how much traction you have to work with.  Do it often, you need to not be surprised when it happens and realize you can just ride it out.  It's HUGELY preferable to slide the rear wheel then the front.  So if you are every worried about traction scrub off some speed with the rear.

Best of luck, I still commute daily, but aren't in Pittsburgh anymore. 

My daughter is in 4th grade.  One of her problems tonight was how many ways can you add coins up to $0.55 with 1 quarter, 3 dimes, 6 nickels, and 10 pennies.  Any takers?  

Not particularly hard, but I did end up writing a brute force search to double check.

She has an entire worksheet on combinations and permutations, but the related materials didn't cover factorials.  Seems kinda silly to ask kids about 6 legged bugs wearing 3 kinds of shoes and 3 kinds of socks to enumerate all possibilities.  Also a fair number of enumerate the ways you can pick 2 of 6 items.  Granted it keeps them busy for awhile.

None of this would be an issue if I had time to cover the missing basics, but the level of homework is such that there isn't time.  We spent 5 hours on homework tonight and didn't even make any progress on a larger assignment due Thursday.  Homework due in the near future includes reading 2 chapters, several vocabulary pages, drawing a detailed map (required in color), drawing various landscapes from a characters description, writing 6 paragraphs, drawing numerous serial and parallel electrical circuits, and correcting some rather poorly taught ideas on current flow vs electron flow.  

It does make me worry that kids don't have much time to be kids.
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