introduction: clinical application of radiography in endodontic practice is affected by reproducibility in the orientation of the x-ray source, image receptor and object. the inability of dentists to locate intra oral films or sensors in appropriate positions in different cases can cause complications in the performance of endodontic therapy. commercially available film holder (endoray) and con...

A number of bacteriological and serological procedures require the use of a series of test tubes. The size of the tubes, as well as the racks used to hold the tubes, may vary. Tubes 12 to 15 mm in diameter and 75 to 100 mm in length are most commonly used. observed at one time. Ambidextrous people can become quite adept at this, while others constantly appear to have five thumbs. With the prove...

|We present a deception analysis for HH older functions. Our approach uses a decomposition on the Haar basis , which reeects in a natural way the HH older structure of the function. It allows to relate the deception, the HH older exponent, and some parameters of the genetic algorithms (GAs). These results prove that deception is connected to the irregularity of the tness function, and shed a ne...

In this paper we extend some aspects of the theory of 'supersolvable lattices' [3] to a more general class of finite lattices which includes the upper-semimodular lattices. In particular, all conjectures made in [33 concerning upper-semimodular lattices will be proved. For instance, we will prove that if L is finite upper-semimodular and if L' denotes L with any set of 'levels' removed, then th...