Development of novel gas sensors
Duffy, Brendan (2002) Development of novel gas sensors. PhD thesis, Dublin City University.
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Of all human senses our ability to detect odours may be the least appreciated and certainly the least understood , and yet is one o f the most powerful. Humans can only see a narrow region o f the light spectrum (300-700 ran), hear a small range in the frequency spectrum (20-20KHz), touch objects that are close. The smell and taste o f substances however can give us much more information about an objects nature. However quantifying these senses is difficult. The taste o f substances has been provisionally classed as being Sour, Bitter, Sweet or Salty. Smells have been classed as being camphoraceous, ethereal, floral, minty, musky, pungent or putrid , but this has been described as being over simplistic , Therefore to mimic the nose it is necessary to understand how the nose functions
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