Using light to change the makeup of plastics

A FAMU-FSU College of Engineering professor is using rays of light to control the shape of a special type of plastic, a project that could have long-term implications for manufacturing, solar energy harvesting, aerospace ...

Plants respond to leaf vibrations caused by insects' chewing

Previous studies have suggested that plant growth can be influenced by sound and that plants respond to wind and touch. Now, researchers at the University of Missouri, in a collaboration that brings together audio and chemical ...

Pentagon scientists show off life-size Atlas robot

US Defense Secretary Chuck Hagel got a first-hand look at a life-size robot that resembles Hollywood's "Terminator," the latest experiment by the Pentagon's hi-tech researchers.

Plant defenses: Maize knows how to identify its target

Insect or microbe: plants recognize their attackers and respond by producing specific internal signals that induce the appropriate chemical defenses. That is the main conclusion of a study at the Center for Medical, Agricultural ...

Screening technique uncovers five new plant activator compounds

A new high-throughput screening technique developed by researchers at the RIKEN Plant Science Center (PSC) has been used to uncover five novel immune-priming compounds in Arabidopsis plants. Discovery of the compounds, which ...

Defence mechanism

In Freudian psychoanalytic theory, defence mechanisms or defense mechanisms (see -ce/-se) are psychological strategies brought into play by various entities to cope with reality and to maintain self-image. Healthy persons normally use different defences throughout life. An ego defence mechanism becomes pathological only when its persistent use leads to maladaptive behavior such that the physical and/or mental health of the individual is adversely affected. The purpose of the Ego Defence Mechanisms is to protect the mind/self/ego from anxiety, social sanctions or to provide a refuge from a situation with which one cannot currently cope.

They are more accurately referred to as ego defence mechanisms, and can thus be categorized as occurring when the id impulses are in conflict with each other, when the id impulses conflict with super-ego values and beliefs, and when an external threat is posed to the ego.

The term "defence mechanism" is often thought to refer to a definitive singular term for personality traits which arise due to loss or traumatic experiences, but more accurately refers to several types of reactions which were identified during and after daughter Anna Freud's time.

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