1 Next add your ingredients: the compost and kelp or molasses. 2  Let the tea brew for about 24 hours. 3  Make sure the opening to the air pump is distributed evenly (cheapest is an air stone) and secured to the bottom, so it does not get pushed to the top overnight. 4  This will keep the tea sufficiently aerobic.
One example of a technical control is data encryption. Other examples are network intrusion detection systems, passwords, firewalls and access control lists. Continue Reading. Technical controls secure computing system and information access through strategically designed software and hardware.
Statistical process control (SPC) A leader in SPC software For over 30 years, PQ Systems has been a leader in providing statistical process control (SPC) software to a variety of industries. Since 1982, when we released our first generation SPC software, SQCpack, for an Apple II computer, we have been dedicated to continuously improving our statistical process control software solutions.