garphunkle

12 miesięcy temudiscuss

I thrive in high-stress situations (for short periods of time). Examples include hardware validation before a large production run, putting out literal fires in manufacturing sites, and working in foreign countries to troubleshoot/rework bad hardware. I do fine in live coding interviews, they don't feel much different than being alone at an editor for me.

I was interested by the author's statement: "Working memory is the most reliable proxy (I know of) for fluid intelligence, your ability to reason, solve novel problems, and think abstractly." and the linked study (https://pubmed.ncbi.nlm.nih.gov/21037165/). My working memory is not so great, but it degrades less under stress.

Question worth considering for hiring managers: do you prefer stress-capable employees, or greater working-memory employees? Is my model a false dichotomy?

garphunkle

2 lata temudiscuss

Shout-out to Violet Crown, PHENOM, Breakfast Club, UNITED, Night Owls, and all the other great cycling clubs in Austin! Wonderful community that I still miss.

Have you tried swapping bikes with your buddy? Are you two the same height/weight? Who has the more flexible spine? It would be fascinating to measure aerodynamic efficiency for two riders on the same bike. Is the more variation within populations, or between populations?

garphunkle

2 lata temudiscuss

Try using the Silca Tire Pressure calculator set to "Gravel Roads". This will give a safe PSI recommendation with a nod to comfort. I would ride 28mm GP4000s around 75 psi on a training ride with lots of chip seal

garphunkle

2 lata temudiscuss

I'm not sure if steel frames make a significant difference in comfort. If we measure comfort as deflection or vibration, then tire choice will have orders of magnitude more importance. When you have two springs in series, the combined spring constant is dominated by the weaker spring.

I race on a carbon frame with 30mm tires, and commute on a steel frame with 38mm tires for what it's worth.

Bike weight is irrelevant on flat roads. We should be obsessing over Watts/gram of drag, not Watts/kg if you're not a climber

garphunkle

3 lata temudiscuss

Someday vendors will provide L2CAP support and we can all stop using GATT for bi-directional data transfer

garphunkle

3 lata temudiscuss

Android allows you to initiate scanning and receive advertisements without user interaction (assuming the app has the permissions to run in the background and use Bluetooth). Advertisements are "broadcasts" or "beacons"

garphunkle

3 lata temudiscuss

"Pairing" in BLE-speak is a key exchange procedure so devices can establish a secure connection without performing authentication again.

BLE communication can happen inside of a "connection", or outside of a connection.

A typical device "advertises" it's presence with beacons which are broadcast on 3 channels. These beacons are user-defined, so you can use them like UDP packets. Sensor wakes up and broadcasts the current temperature.

Your smartphone can receive advertisements while scanning. Check out the insane number of beacons present in an American apartment complex.

Note: BLE connections may be encrypted, or not. That's up to you. You do not need to "pair" (exchange keys) to communicate with a connection. There are 4 "modes" to authenticate. Without an out-of-band communication mode, all are vulnerable to MITM.

The latest BLE standard improves range with a half-data rate PHY. Range is determined by transmit power and attenuation. Most BLE radios are designed for short-range communication. I've never seen one consuming more than mW, but that does not mean you couldn't make an amplifier that transmits BLE much further

garphunkle

3 lata temudiscuss

Lutron Electronics is a good counter example

garphunkle

7 lat temudiscuss

  Location: Philadelphia, PA or Austin, TX
  Remote: Yes
  Willing to relocate: Yes, to Austin or Philly
  Technologies: C++, Embedded, Python, Jenkins, ARM, Bluetooth, OpenThread
  Résumé/CV: https://tinyurl.com/y3vl7o9a
  Email: [email protected]

Two years of new product development and working with the high quality internet of things platforms. I'm relocating to a city my significant other has job offers in.

Feel free to drop me an email for a phone or technical screen.

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