private void checkCharges() {
		coulombicIsOn = false;
		for (int i = 0; i < iAtom; i++) {
			if (Math.abs(atom[i].charge) > ZERO) {
				coulombicIsOn = true;
				break;
			}
		}
		if (coulombicIsOn) {
			minimumJobCycleTime = 2 * DEFAULT_MINIMUM_JOB_CYCLE_TIME;
		} else {
			minimumJobCycleTime = DEFAULT_MINIMUM_JOB_CYCLE_TIME;
		}
		if (System.getProperty("os.name").startsWith("Mac"))
			minimumJobCycleTime *= 2;
	}