valdis laan in [5] introduced an extension of strong flatness which is called weak pullback flatness. in this paper we introduce a new property of acts over monoids, called u-wpf which is an extension of weak pullback flatness and give a classification of monoids by this property of their acts and also a classification of monoids when this property of acts implies others. we also show that regu...

Chronic atelectasis and pneumonia of the middle lobe have been described as a clinical syndrome, of which the essential pathological feature is an obstruction of the middle lobe bronchus. The cause of obstruction may be intraluminal or extraluminal, specific causes such as tumour or active tuberculosis not included. Graham, Burford, and Mayer (1948) reported 12 cases in which the syndrome resul...

UNLABELLED When thyroid tissues exhibited concentrations of therapeutic (131)I that appeared to be less than that predicted by data from the preceding diagnostic (131)I, the phenomenon was called stunning. We hypothesized that stunning arose from the early effects of the therapeutic dose of (131)I and that the initial uptake of (131)I, observed within the first day, was not impaired by the diag...