in al-ta‘liqat–which is most likely a collection of avicenna’s lectures– it is intended to answer to a paradox concerning the knowledge of the substance. this paradox can be reconstructed this way: if, by knowing something, its quiddity comes to mind, then with knowing a substance its quiddity–which is a substance–comes to mind. conversely, according to peripatetic philosophy, knowledge is a qu...

Russian neurology was virtually nonexistent in the middle of the 19th century which made a traineeship abroad an absolute necessity. Charcot and his school did not just offer professional training, but created the best minds, which would determine the direction of neurology and psychiatry in Russia for many decades. After returning home, young Russian doctors not only implemented everything the...

As the elderly population of the United States grows in absolute number and as a proportion of total population, accurate projections of that population become increasingly important for sound policy decisions. Cohort component techniques are typically used for state and local projections of the elderly population, but are often outdated or even nonexistent for many local areas. This paper sugg...

Qualified residue difference sets of power n are known to exist for n = 2, 4, 6, as do similar sets that include the zero element, while both classes of set are known to be nonexistent for n = 8 and n = 10. Both classes of set are proved nonexistent for n = 12.