According to Leonard Cohen's song "Anthem",
Ring the bells that still can ring
Forget your perfect offering
There is a crack, a crack in everything
That's how the light gets in.
Obviously, to detect the crack, you look for the light shining in.
(Or on a plumber, you wait for him to bend over, and then you take a look.)
ADVANTAGES OF IDS
Detection theory allows one to quantify the ability to discern between information bearing patterns and random patterns that causes confusion in the patterns. In electronics, detection theory is often called signal recovery.
If the crack has enlarged as a result of the freezing water, it is an example of a type of physical weathering known as ice wedging.
Ultrasonic sound is of a frequency that is above our hearing (>20kHz). +++ The question asks for applications. They are numerous but include cleaning (by cavitation in a liquid in which the work-piece is suspended), certain types of welding / soldering, crack detection in welds, encouraging certain chemical or physical reactions... Medically, ultrasound is used for diagnostic imaging such as of the foetus, and the destruction of "stones".
Heroin and methamphetamine are both much more addictive than crack.
1PPM
The best method for repairing a cement crack using a cement crack sealer is to clean the crack thoroughly, apply the sealer according to the manufacturer's instructions, and allow it to dry completely for a strong and durable repair.
The best method for repairing a cement crack using cement crack filler is to clean the crack thoroughly, apply the filler according to the manufacturer's instructions, and allow it to dry completely before smoothing it out for a seamless finish.
The best method for repairing a concrete crack using a concrete crack sealer is to clean the crack thoroughly, apply the sealer according to the manufacturer's instructions, and allow it to cure completely before using the repaired area.
The best method for repairing a bathtub crack using bathtub crack sealant is to clean the crack thoroughly, apply the sealant according to the manufacturer's instructions, and allow it to dry completely before using the bathtub again.
The best method for repairing a stucco crack using a stucco crack sealer is to clean the crack thoroughly, apply the sealer according to the manufacturer's instructions, and allow it to dry completely before painting or finishing the surface.
a pee test.
A bioautography is a form of chromatography employing a biological detection method.
A bioautography is a form of chromatography employing a biological detection method.
To crack walnuts effectively using the method of "how to crack walnuts," place the walnut in a nutcracker and apply gentle pressure until it cracks open. Be careful not to apply too much force to avoid crushing the walnut.
The best method for repairing a concrete slab crack using concrete slab crack filler is to clean the crack thoroughly, apply the filler according to the manufacturer's instructions, and allow it to cure completely before sealing the surface.
Reconnaissance