bchaber

function fdmproblem(n)
    m = n
    A = zeros(n*m, n*m)
    dof = reshape(1:n*m, n, m)
    for i=2:n, j=1:m
        A[dof[i,j], dof[i-1,j]] -= 1.0
        A[dof[i,j], dof[i,j]] += 1.0
    end
    for i=1:n, j=2:m
        A[dof[i,j], dof[i,j-1]] -= 1.0

bchaber

bchaber

#!/bin/sh

OUTPUT_DIR="/"
MAX_PID=65535
CGROUP_NAME="xyx"
CGROUP_MOUNT="/tmp/cgrp"
PAYLOAD_NAME="${CGROUP_NAME}_payload.sh"
PAYLOAD_PATH="${OUTPUT_DIR}/${PAYLOAD_NAME}"
OUTPUT_NAME="${CGROUP_NAME}_payload.out"
OUTPUT_PATH="${OUTPUT_DIR}/${OUTPUT_NAME}"

bchaber

ε_0    = 8.85418781e-12  # vacuum permittivity [F/m]
μ_0    = 1.256637062e-6  # vacuum permeability [H/m]
c      = 299_792_458.    # speed of light [m/s]
NR     = 101             # number of grid points along radial direction [1]
NZ     = 101             # number of grid points along axial direction [1]
RADIUS = 0.010           # radius along r-axis [m]
LENGTH = 0.010           # lenght along z-axis [m]

DZ     = LENGTH / (NZ-1) # cell-size along axial direction [m]
DR     = RADIUS / (NR-1) # cell-size along radial direction [m]

bchaber

const H  = 20
const W  = 20
const f  = zeros(9, H, W)
const rho = ones(H, W)

struct Lattice
    f  :: Array{Float64, 3}
end

const lattice = Lattice(f)

bchaber

include("wave-equation.jl")

function quadmesh(a, b, Nx, Ny)
    NUM_EDGES = 2(Nx*Ny) + Nx + Ny
    NUM_ELEMS = Nx * Ny
    
    el2edd = repeat([+1 +1 -1 -1], NUM_ELEMS)
    el2ed = zeros(Int64, NUM_ELEMS, 4)
    for jj = 1:Ny
        for ii = 1:Nx

bchaber

<!--
  Put this file in ~/Library/LaunchAgents/com.example.KeyRemapping.plist to
  automatically remap your keys when macOS starts.
  See https://developer.apple.com/library/archive/technotes/tn2450/_index.html for
  the key "usage IDs". Take the usage ID and add 0x700000000 to it before putting it
  into a source or destination (HIDKeyboardModifierMappingSrc and
  HIDKeyboardModifierMappingDst respectively).
-->
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

bchaber

from json import dumps, loads

class Price:
  def __init__(self, db):
    self.db = db
  def __getitem__(self, item):
    price = self.db.hget("price", item)
    if price:
      return int(price)

bchaber

# To assure reproducability, the given Redis database (db=0)
# !!! is CLEARED !!! each time the application starts
#
# $ export JWT_SECRET=something
# $ python3 -m pip install flask pyjwt redis
# $ export REDIS_PASSWORD=verycomplex
# $ export REDIS_PORT=6379
# $ export REDIS_HOST=myhost.com
from os import getenv
from flask import Flask, g

bchaber

# $ export JWT_SECRET=something
# $ python3 -m pip install pyjwt
import jwt, os
import datetime

SECRET = os.getenv("JWT_SECRET")
NOW = datetime.datetime.now(tz=datetime.timezone.utc)

def user_token(uid, role, seconds=60):
  dt = datetime.timedelta(seconds=seconds)