751 March 2013 T anesthesia machine is the most integral piece of equipment used by anesthesia providers. When semiclosed circle systems are used, unidirectional valves become integral components that direct carbon dioxide containing gas across the absorbent and along the inspiratory limb, mixing with fresh gas as it flows into the patient. Unfortunately, human error is known to be the most com...

Atmospheric halothane was sampled from three selected operating theatres and anaesthetic rooms during the middle of operating sessions. Two of the operating theatres studied were ventilated with total air exchange once every six minutes; the third operating theatre had no ventilation. End-tidal samples were obtained from anaesthetists. Halothane vapour concentrations were analysed by gas-liquid...

ABSTRACT Giant star-forming regions (clumps) are widespread features of galaxies at z ? 1?4. Theory predicts that they can play a crucial role in galaxy evolution, if survive to stellar feedback for >50 Myr. Numerical simulations show clumps’ survival depends on the recipes adopted. Up date, observational constraints both outflows strength and gas removal time-scale still uncertain. In t...

module over a ring is a general mathematical concept for many examples of mathematicalobjects that can be added to each other and multiplied by scalar numbers.in this paper, we consider a module over a ring as a universe and by using the notion of reference points, we provide local approximations for  subsets of the universe.

the concept of an $l$-bornology is introduced and the theory of $l$-bornological spacesis being developed. in particular the lattice of all $l$-bornologies on a given set is studied and basic properties ofthe category of $l$-bornological spaces and bounded mappings are investigated.

a novel method to compute the stability region in power system transient stability analysis is presented. this method is based on the set analysis. the key to this method is to construct the hamilton-jacobi-isaacs (hji) partial differential equation (pde) of a nonlinear system, using which we can compute the backward reachable set by applying the level set methods. the backward reachable set of...

many textbooks include semantically related words and sometimes teachers add synonyms, antonyms, etc. to the words in order to present new vocabulary items without questioning the possible effects. this study sought to investigate the effect of teaching vocabulary through synonym, semantically unrelated, and hyponym sets based on higa’s (1963) proposed continuum. a total of 120 iranian intermed...