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Passenger Numbers Have Grown From 12,000 In Its First Year To 1.1m In 2006. ...

Passenger numbers have grown from 12,000 in its first year to 1.1m in 2006.
As can be seen, Aer Arann characterises a growing company taking advantages of shifting market and social forces to maximise their potential in a competitive market. In particular, the expansion of services, following considerable investment, means an expansion in all areas of the business, requiring growing managerial and other systems for effective strategic management in line with its continuing vision. A significant expansion is in the amount of personnel and the need for a forward-thinking, proactive approach to employee management and support is evident.
Circadian Rhythm
A 'circadian rhythm'is a roughly-24-hour cycle in the physiological processes of living beings, which are endogenously generated, although they can be modulated by external cues such as sunlight and temperature (Dunlap et al, 2003). Circadian rhythms are also definitely related to light-dark cycles (Dunlap et al, 2003), which demonstrates their significance in relation to 24 hour shift working. Circadian rhythms seem to have some significance in defining the sleeping and feeding patterns of all animals, including human beings (Dunlap et al, 2003). The biological literature also shows that there are distinct patterns of brain wave activity, hormone production and regulation, cell regeneration and other biological activities and functions that are linked to and affected by this daily cycle (Dunlap et al, 2003).
In the era of air travel, travellers encounter challenges to established circadian rythms when crossing time zones or when changing lifestyles outside of an established pattern (Panda et al, 2003). The body 'remembers' the previous time zone or circadian rhythm, such that sleepwake patterns, mental alertness, eating habits and many other physiological processes temporarily suffer the consequences of time displacement until the body adjusts to the new time zone or shift pattern (Panda et al, 2002). It follows that if time zones or shift patterns were to be constantly changing, there may be issues in adjusting circadian rhythms to suit.

Discussion
There is a degree of literature which suggests that shift work has a negative impact upon the health and wellbeing of shift workers (Costa, 1996; Knutsson, 2003). The effects of 24 hour shift patterns can include disturbances of the normal circadian rhythms of the psycho-physiological functions of a person, beginning with the sleep/wake cycle (Costa, 1996).

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