tim This error was pretty hard to solve. I emailed heroku support and they recommended: “https://github.com/ddollar/heroku-accounts”:https://github.com/ddollar/heroku-accounts bq. For git commands to work git needs to use the ssh key associated with that account. It’s probably choosing a key associated with a different account which is causing these permissions errors. You can use a ~/.ssh/config file to … Read more
First I read the docs at: rubydoc.info to understand how FasterCSV is now in the ruby standard library. Then, I set up the following code: https://gist.github.com/tbbooher/1700200 This gives me a pretty flexible solution to render csv, but I’m really interested to see if this is a good way to go. Your comments are appreciated.
Here we tackle what a Radar needs to accurately measure a target’s position, size and motion. (This is nothing new, just a placeholder for some of my notes.) First of all, everything depends on $SNR$, and the parameter estimation happens in the main computer of a Radar. The theoretical rms error of a measurement is … Read more
I want to know the impact of wind on endurance. So we have something like this: This gives us 8 cases of wind direction: From this we can infer that going to the center from one of the 8 directions. So an overall flight path would look like this: If each grid cell is a … Read more
h2. Should I even buy the years? what if we use the 13K for something really special? the cashflow is way out there. 1 36 7836.4409 2 37 8692.4214 3 38 9592.7079 4 39 10539.1884 5 40 11533.8243 6 41 12578.6531 7 42 13675.7911 8 43 14827.4367 9 44 16035.8728 10 45 17303.4704 11 46 … Read more
[ E = frac{eta}{c}left( frac{C_L^{3/2}}{C_D} right) sqrt{2 rho S} left( frac{1}{W_f} – frac{1}{W_i} right) ] Where (eta) is the propeller efficiency, (c) is the minimum power specific fuel consumption rate, maximum density of air, ( rho ).
Goal: characterize the winds available around the world. First we need to construct our grid: The horizontal, latitude-longitude grid ranges from +70 to -70 deg in latitude and from 0 to 357.5E deg in longitude, producing a grid that has dimensions of 57 x 144 points. In matlab, this is: [cells/degree northern_latitude_limit western_longitude_limit] zerom( These … Read more
In one of my applications, I have the following config files that are excluded from git: * config/mongoid.yml * config/application.yml * config/mailserver_setting.rb * config/omniauth_settings.rb For deploying to a regular server, I just add tasks to my capistrano deployment file to create sym-links to a shared directory. In this case I have to modify my application … Read more
If you walk up our attic steps, you will be surrounded by this: The problem is that it takes forever to find and store things, so we don’t store them there or we buy duplicates of things we already have. I am often prevented from getting things done because I want them done perfectly. However, … Read more
If I have two Mongoid models joined by a has_and_belongs_to_many relationship, Users and Groups. I need to quickly and efficiently sort by the most popular groups which really should be done with a counter_cache. However, counter_caches are implemented in rails by setting a callback to update the counter cache every time a child model is … Read more