Definition: This category differs from others in that it includes disorders identifiable on the basis of not only symptoms and course but also the existence of one or other of two causative influences: an exceptionally stressful life event producing an acute stress reaction, or a significant life change leading to continued unpleasant circumstances that result in an adjustment disorder. Although less severe psychosocial stress ( life events ) may precipitate the onset or contribute to the presentation of a very wide range of disorders classified elsewhere in this chapter, its etiological importance is not always clear and in each case will be found to depend on individual, often idiosyncratic, vulnerability, i.e. the life events are neither ...[+++] necessary nor sufficient to explain the occurrence and form of the disorder. In contrast, the disorders brought together here are thought to arise always as a direct consequence of acute severe stress or continued trauma. The stressful events or the continuing unpleasant circumstances are the primary and overriding causal factor and the disorder would not have occurred without their impact. The disorders in this section can thus be regarded as maladaptive responses to severe or continued stress, in that they interfere with successful coping mechanisms and therefore lead to problems of social functioning.

spindles

diffusion stack | sigma pile

factor VIII:C | factor VIII | antihemophilic factor | antihemophilic factor A

F agent | F element | F episome | Fertility factor | F factor | F plasmid

Resistance plasmid | R factor | R plasmid

Some that relied heavily on the expertise of external consultants (such as through twinning arrangements and SIGMA) appear to have progressed more rapidly, but there may have been other factors influencing their progress.

The imperative of sustaining global competitiveness is a major factor in the high levels of aerospace R and D investment; the continuous drive for improved processes; quality initiatives such as six sigma; and wholesale changes to the way in which we design, develop, build, and support aircraft and other aerospace products.

Some that relied heavily on the expertise of external consultants (such as through twinning arrangements and SIGMA) appear to have progressed more rapidly, but there may have been other factors influencing their progress.