HNHacker News
TopNewBestAskShowJobs

dave333

514 karma · joined January 29, 2014

submissionscomments
dave333··on TCAS Avoided Collision with Army Helicopter over Potomac River [video]
If they were at the same height on a collision course then to each other their lights would appear stationary on or near the horizon. Its possible there were some other lights that the helicopter pilot mistook as the plane. From the crash video it appears there was another plane taking off and it's possible the helicopter pilot thought this was the traffic they had to avoid. Strobe would be the only clue the lights belong to air traffic but would be hard for the helicopter pilot to see drowned out by the planes landing lights. Maybe they will fly a reenactment to find out what each pilot could see.

PS reportedly the helicopter crew were wearing night vision goggles that might restrict their peripheral vision or make it harder to distinguish really bright landing lights on the plane from normal bright lights.

dave333··on 100 years of Bell Labs [pdf]
As a newly landed immigrant to the US I worked at Bell Labs in Naperville IL for most of the decade of the 1980s and I have a few fun memories mostly of extra-curricular stuff.

There was a Unix version of the popular Aliens video game built with curses and played on 9600 baud terminals and when the Pacman video game came out I hacked the Aliens code to play it. Initially I had the monsters represented by 'M' until the player hit the appropriate button that made them run away instead when I changed the character for the monsters to 'W' for wimp. This ran afoul of the affirmative action police as it suggested superiority of 'M'en over 'W'omen so I hastily changed 'W' to 'S'.

Another time there was a paper airplane contest where the planes were launched from the 4th floor walkway into the atrium of the Indian Hill West building. There were prizes for the longest distance flight, longest time flight, fastest plane and most beautiful flight. I won the latter with a helicopter-like plane that just spun its way slowly to the floor.

The best talk I remember giving was one explaining the game of cricket that took a full hour, and as for work contributions I can only remember coming up with the idea to use the geometric mean to summarize benchmark results.

PS one more - my first US code review I spent about 30 mins explaining how my code worked with few if any questions from the other participants. Finally I asked if there were any other questions when someone hesitantly said - "Yes, what is this variable "zed" that you keep talking about?"

dave333··on Show HN: I built a DIY plane spotting system at home
Was thinking of some recent videos where a small drone closes right up to an individual soldier and explodes - assuming those aren't AI generated. But I expect there will be drone hunting drones and drone dogfights will be a thing.
dave333··on How far can you get in 40 minutes from each subway station in NYC?
Assuming multi-modal travel is allowed of course.
dave333··on How far can you get in 40 minutes from each subway station in NYC?
But how long does it take to get to Mornington Crescent?
dave333··on Show HN: I built a DIY plane spotting system at home
Given that drone warfare is now a thing this seems like it could be useful as the basis of a personal drone detection and warning kit that soldiers could wear over their helmet to spot drones and give say an audible warning in the soldiers ears that lets the soldier locate the drone direction and maybe azimuth with pitch - lower frequency for a low drone and high for one more overhead. Not sure if such a thing already exists. That and a shotgun would be a reasonable defense.
dave333··on Show HN: I made a mini golf in my lunch time
Interesting that there's no need to have greens around the hole. In real golf, construction and maintenance of the greens is a primary cost. I play a simplified form of golf in public parks (or any semi-open space) using one club and foam practice balls that won't hurt anyone and only go about 40 yards max. I use lightpoles and trees as targets and chip the ball to hit the pole or tree as holing out. Most parks you can arrange various holes through and around the vegetation and structures.
dave333··on Show HN: A submarine combat game in the browser
Seems like a good strategy is to circle slowly until you pick up a sonar trace and then try to follow it and get in the opponent's baffles. Converting the sonar trace into a map of the opponent's position over time is the essential skill and is something that I'm sure is automated in real submarines.
dave333··on Framework Fatigue: The Real Reason Developers Get Angry About New Tech
A new framework every 18 months or so is fine until you get too old to learn the new tricks. In my case that happened with React at age 60 when having used callbacks for a decade or more this new f%$^&led thing called a promise came about that just threw me for a loop. AI would have been useful to write that code for me but it was still 5 years away. There used to be legacy codebases still running like business applications written in Cobol that ensured employability for old dogs but not the case for javascript.
dave333··on Show HN: I made a mini golf in my lunch time
This is fun. Strategy is to get in line with the hole so there's a chance to hole out next shot. Would be more realistic if you could hit any number of spaces up to the die roll. Maybe have different clubs - driver = die roll +3, iron = die roll, putter that can hole out at any distance up to 6 not necessarily in a straight line if you roll that distance or more. So e.g. putter can hole out with knights move if you roll 3 or higher.
dave333··on The Trouble with Elon
Seems like Elon decided to use his platform for political power, and is learning politics as he goes at the Trump school. He's achieved star pupil/teacher's pet status helped by his ability to buy his way in. Despite all the propaganda he spouts on X are his long term goals still the same, i.e. combat climate change? Plus he is finding new things to optimize, like government efficiency.
dave333··on The Trouble with Elon
Incorrect - the fatality rate of covid pre vaccines was 1 to 3% worldwide, and about 15% in older more vulnerable people. Flu fatality rates are around 0.1%.
dave333··on The Typical Man Disgusts the Typical Woman
In civilization yes. But these were not the conditions under which human evolution happened. It's about having the judgement and balls to take a risk like bluffing in poker. Also it's not the size of the dog in the fight its the size of the fight in the dog.
dave333··on The Typical Man Disgusts the Typical Woman
Attractiveness may be the wrong question. Women tend to prefer "bad boys" who may protect them better from other males. Some women also respond sexually to stressful or painful situations that they wouldn't normally seek.
dave333··on Be Aware of the Makefile Effect
The traditional Unix man page or list of options output with --help is often a firehose of details that most devs will never use. Sometimes there are a few examples shown of common use cases which is a good place to start learning the tool.
dave333··on Ask HN: How to approach first days on a new job as a senior engineer?
Building a reputation is important. Can you make a contribution immediately? I was pulled into a firefight where the biz folks were micromanaging the tech folks with twice-daily meetings, with little progress being made. Two or three obvious and immediate fixes later I was able to cut the meetings back to daily and after a few more to weekly.
dave333··on Ireland has lost almost all its native forests
Imagine if 1% of Ireland were covered in Permaculture Food Forest

https://www.youtube.com/watch?v=52o0gCnur7Q

Above video is much more hands on than a typical food forest that would be much more plant and forget until various foods can be seasonally harvested. Started as a small holding of boggy ground about 20 years ago.

dave333··on Magnus Carlsen quits chess championship after being told to change jeans
Compare to Lewis Hamilton being forced to remove jewelry and Max Verstappen being penalized for swearing. Petty officialdom loves to flex their puny muscles.
dave333··on Berlin-Paris high-speed rail route symbolizes Europe's thirst for train travel
That's further north than the direct line - I know I have fond memories of hitchhiking Brussels->Aachen with my girlfriend in the 1970s. Direct Paris/Berlin train needs to go along the Sedan/Bastogne axis that is not very flat.
dave333··on Berlin-Paris high-speed rail route symbolizes Europe's thirst for train travel
The route is surprisingly Z-shaped mostly due to geography, since the Ardennes lie on the direct line. Also the development of the rail network in either country took no account of the other country.
dave333··on Crystal Ball Trading Game
The fed follows the market rates - their control is an illusion.

https://www.elliottwave.com/articles/fed-rate-cut-interest-r...

dave333··on Crystal Ball Trading Game
Elliott Wave Theory one of the most used/followed technical market tools posits that price movements are determined by social mood and not by news. So it should be hard to win based on front page fundamentals. That said I came through the game with a 50% profit overall by mostly going long stocks and long bonds with consistent 5x leverage. If you have a winning edge then you can use Kelly betting to size bets and maximize gains, but it's easy to overbet and go bust. One approach is to increase leverage after a win and reduce it after a loss, and you end up near the optimum leverage.

https://www.elliottwave.com/education/

dave333··on GCHQ Christmas Challenge Puzzles
Link is to BBC article. Direct link to puzzle PDF is https://www.gchq.gov.uk/files/GCHQ%20Christmas%20Challenge%2...
dave333··on AI company that made robots for children went bust and now the robots are dying
Let your kids do a hardware autopsy/reverse engineer/disassembly on it. Can play medics or just see how it looks/works inside. Not $800 worth but better than tossing it.
dave333··on Just Say No to JavaScript
Most code doesn't last long enough to need maintenance.
dave333··on Self-eating rocket could help UK take a big bite of space industry
Possibly useful on missions that don't come back.
dave333··on Contradictions in photography advice
Rather than contradictions think of photography patterns like design patterns.
dave333··on Assassination is a leaky abstraction
Maybe when Musk is done with the govmint he can fix healthcare.
dave333··on The "Bird and Baby" grows up: inside the new Eagle and Child
The other idiosyncratic pub in Oxford is the Turf Tavern to be found down some twisty passages off Holywell Street. But my 1970s Oxford undergrad experience was daily pie, beans, and chips in the much more normal Kings Arms opposite the Bodleian.
dave333··on The story of Rogue
Hated the Rust Monsters on level 8 that would destroy any decent armor you had managed to enhance and rarely survived the Umber Hulks on level 18 with their ability to confuse you and the huge damage they did. Never found the amulet. Got fantastic keyboards skills for vi directional commands at least for a non-touch typist.
← PreviousPage 4 of 25Next →