Let $Q$ be an inverse semigroup. A subsemigroup $S$ of $Q$ is a left I-order in $Q$ and $Q$ is a semigroup of left I-quotients of $S$ if every element $qin Q$ can be written as $q=a^{-1}b$ for some $a,bin S$. If we insist on $a$ and $b$ being $er$-related in $Q$, then we say that $S$ is straight in $Q$. We characterize semigroups which are left I-quotients of left regular bands of right cancell...

one hundr od pa t i e nt s hospitalized at t h medical war d o f 2mam khome nyni . hospi tal were psyc hia t r i cally i nterviewe d and examined regardless of the i r phys i ca l diag nos i s . psychiatric diag nosis were so suggested. it was f ound that only 36 rercent o f the s ample were psychologic a l ly normal t he r emaining 64 per cent were found t o have neurotic pers onality o r su~f...

we determined the concentrations of lead and cadmium in edible parts of colocasiaesculenta,amaranthusspp. and ipomoea batata cultivated on farms in industrially polluted sections of nyabugogomarsh (kigali, rwanda) and quantified metal intake by consumers of these crops. we report that metalconcentrations in crops were within eu limits. the highest metal concentrations were found in amaranthussp...

We define the (n, i, f)-tube orders, which include interval orders, trapezoid orders, triangle orders, weak orders, order dimension n, and interval-orderdimension n as special cases. We investigate some basic properties of (n, i, f)-tube orders, and begin classifying them by containment.