an air filter is a significant element of any mechanical ventilation system. however, the importance and performance evaluation of air filters have not been well publicized and related scientific reports are scarce. in this study, a transportable, off-line, air filter-testing unit (the unit) was designed and utilized to simulate the filter housing of a mechanical ventilation system. the unit wa...

This paper is concerned with the semantics of so-called plurals extension, a class lexical such as mountains, cliffs, skies, Hebrides, and Pyrenees. While similar on surface to regular plural nouns, they behave differently in certain regards, including their compatibility determiners, interpretation half N partitives possibility occur weak definites. We will argue that extension denote predicat...

BACKGROUND Placebos play an important role in clinical trials and several surveys have shown that they are also common in daily practice. Previous research focused primarily on the frequency of placebo use in outpatient care. Our aim was to explore physicians' views on the use of placebos in daily practice, whereby distinction was made between pure placebos (substances with no pharmacological e...

This paper describes a purely functional dialect of the algorithmic programming language Scheme. Mutable variables, assignment operations and impure control operations (call-with-current-continuation) have been omitted, while side effecting input and output operations are incorporated into the purely functional language using monads, similar to the approach taken in the lazy programming languag...