Depression and addiction, for example, have several things in common, including: 1  Loss of interest in once-enjoyable activities. 2  Fatigue. 3  Feelings of hopelessness. 4  Reckless behavior. 5  Irritability.
Deflection Temperature Testing of Plastics. The deflection temperature is a measure of a polymer's ability to bear a given load at elevated temperatures. The deflection temperature is also known as the 'deflection temperature under load' (DTUL), 'heat deflection temperature', or 'heat distortion temperature' (HDT).
How Insulation Prevents Heat Transfer. Learn how insulation works to slow the movement of hot air. Discover how insulation can help stop three different types of heat transfer: conduction, convection and radiation.onvection is the transfer of heat through liquids or gases. 1  Example: When cold air enters your home, it mixes with warm air. 2  Heat energy is transferred to the cooler air, and the overall temperature of the room is lowered. 3  Result: More energy is required to replace the heat transferred to the cooler air.