SERVING THE QUANTITATIVE FINANCE COMMUNITY

Search found 13031 matches

by farmer
March 11th, 2020, 1:29 am
Forum: Off Topic
Topic: the dark matter of politics
Replies: 0
Views: 3865

the dark matter of politics

I have long observed that nihilists play a significant role in democratic elections. Here is an example. Suppose you point out to supporters of Bernie Sanders for US President, that his policies would result in poverty and correlated suffering and death. Without admitting to it, many of his supporte...
by farmer
March 11th, 2020, 1:15 am
Forum: Off Topic
Topic: coronavirus kill rate
Replies: 10
Views: 2072

coronavirus kill rate

I got the novel coronavirus back in January. It is totally a lung infection. It's mortality is totally dependent on how irritated, unhealthy, or inflamed your lungs already are. For that reason, because of the low smoking rate in the USA, and the clean indoor air, I estimate kill rate in the USA to ...
by farmer
October 4th, 2019, 11:35 pm
Forum: Off Topic
Topic: Robot Kills Alligator
Replies: 1
Views: 2213

Robot Kills Alligator

by farmer
January 2nd, 2019, 1:09 pm
Forum: Off Topic
Topic: where did this bullet come from?
Replies: 0
Views: 486

where did this bullet come from?

Someone found a bullet, I am trying to figure out where it came from. There is like a cylindrical dent repeated all over it. Like it bounced off many identical things. http://confederaterobot.com/repeatedgrooves.png This could be from the inside of a Savage Range Systems high-capacity bullet catcher...
by farmer
November 16th, 2018, 12:30 pm
Forum: Off Topic
Topic: hog hunting
Replies: 2
Views: 407

hog hunting

by farmer
August 25th, 2018, 12:16 pm
Forum: Off Topic
Topic: AR-10 Assault Robot
Replies: 0
Views: 474

AR-10 Assault Robot

I have to rethink the posture before I can put a reaching tool on there. So I just put an AR-10 which maintains an effectively constant center of gravity with a greater than 1000-foot reach
.
by farmer
July 3rd, 2018, 1:12 am
Forum: Off Topic
Topic: funny robot videos
Replies: 4
Views: 430

Re: funny robot videos

Grade 8 bolts and got them all...
by farmer
June 30th, 2018, 7:05 pm
Forum: Off Topic
Topic: funny robot videos
Replies: 4
Views: 430

funny robot videos

Some sort of funny videos of my robot...
by farmer
February 22nd, 2018, 12:37 am
Forum: Off Topic
Topic: understanding screw torque
Replies: 2
Views: 380

Re: understanding screw torque

I think I figured it out. A gearhead with a low ratio will not burn a lot of energy just spinning. But the worm has a bad angle on the gear, so it is not very efficient at low speed. So a 10:1 gearhead might have a stall torque that is no greater than the full speed torque. But as the ratio goes up....
by farmer
February 22nd, 2018, 12:03 am
Forum: Off Topic
Topic: understanding screw torque
Replies: 2
Views: 380

understanding screw torque

Looking at different worm gearheads, I notice that "full load" spinning torque does not double when the gear ratio doubles. I assume this is because when the screw turns twice as far to spin the gear the same distance, it generates twice as much friction and heat. I have two questions: 1) Assuming t...
by farmer
September 1st, 2017, 9:11 pm
Forum: Off Topic
Topic: gas powered robot?
Replies: 2
Views: 702

Re: gas powered robot?

You have any thoughts on this?
by farmer
August 23rd, 2017, 1:22 am
Forum: Off Topic
Topic: gas powered robot?
Replies: 2
Views: 702

gas powered robot?

My neighbor stopped mowing lawns so I decided to build a robot. For many tasks including cleaning and painting. My requirements included 1) be sturdy enough to carry and guide a weed whacker 2) be able to move quickly on smooth terrain 3) be able to go up the various types of stairs and uneven land ...
by farmer
August 5th, 2017, 7:48 pm
Forum: Off Topic
Topic: thanks, curiosity satisified
Replies: 17
Views: 1829

.

.
by farmer
August 5th, 2017, 7:47 pm
Forum: Off Topic
Topic: thanks, curiosity satisified
Replies: 17
Views: 1829

.

.
by farmer
August 5th, 2017, 6:50 pm
Forum: Off Topic
Topic: thanks, curiosity satisified
Replies: 17
Views: 1829

tx

.
GZIP: On