Cleveland TS23 4YS. Guiding principles for the proof testing of safety instrumented systems (SIS) in the chemical industry. have been developed through research into the practices of proof testing. The proof testing of SIS is an. integral component of the management of functional safety. Its purpose is to confirm the continued.
Psychology of obsession. The definition of obsession is: the inability of a person to stop thinking about a particular topic or feeling a certain emotion without a high amount of anxiety. When obsessed, an individual continues the obsession in order to avoid the consequent anxiety.
Obsession symptoms. OCD obsessions are repeated, persistent and unwanted thoughts, urges or images that are intrusive and cause distress or anxiety. You might try to ignore them or get rid of them by performing a compulsive behavior or ritual. These obsessions typically intrude when you're trying to think of or do other things.