Whereas a signijcant attzount of empirical work has been carried out in the area of logical neural networks, the fundamental theoretical basis is underdeveloped. This paper provides an analysis of recurrent nets of a$ne Boolean functions and defines the relation between their behaviour and that of linear Boolean nets. It is shown that the only effect on the unlabelled state structure of adding any number of inverters to a linear Boolean net is a restricted modification of cycle lengths.

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A method for scanning und displa,ving c h i radiogruphs (i-rajo) is presented. The new method irents scanning indeyendeni of display, Lillowing,for niasirniini informulion con lent to be captured during /he scanning process. und then ,for this inforrnaiion io be optiniullv displuyd irsing new fiuiction j o r tna.~iniizing the contrasi vuriotion thrvirghour the inluge. The qirulity of the digirized x-ray images were compared ugainsr the original s-rcrj~.filnis and were jbiind io be vf coniparuble visimlization qirality. The rib purenchvnial is then segniented by un uclive skupe nion'el.

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