We theoretically consider the problem of doping induced insulator to metal transition in bulk semiconductors by obtaining density as a function compensation, assuming that is an Anderson localization controlled Ioffe-Regel-Mott (IRM) criterion. calculate mean free path, on highly doped metallic side, arising from carrier scattering ionized dopants, which we model quenched random charged impurit...

INTRODUCTION The purpose of this in vitro study was to compare the coronal seal of four temporary filling materials, Coltosol, Zonalin, Zamherir, and Intermediate Restorative Material (IRM) by the India ink dye penetration test. MATERIALS AND METHODS Endodontic access preparations were prepared in 120 extracted intact human premolars. The teeth were randomly divided into six groups including ...

Le glioblastome correspond à une tumeur cérébrale qui touche les astrocytes. C'est le cancer cérébral le plus fréquent (mais restant malgré cela rare) chez l'adulte, mais aussi le plus agressif. Le diagnostic repose sur l'interrogatoire qui cherche des signes neurologique et visuels évocateurs de la maladie. En cas de suspicion de pathologie cérébrale, un scanner et une Imagerie à Résonance Mag...

This paper investigates an iterative approach to solve the general rank-constrained optimization problems (RCOPs) defined to optimize a convex objective function subject to a set of convex constraints and rank constraints on unknown rectangular matrices. In addition, rank minimization problems (RMPs) are introduced and equivalently transformed into RCOPs by introducing a quadratic matrix equali...

Most Information Resource Management (IRM) groups do not have any quantitative basis for planning, prioritising or measuring the results of their activities. As a result, the practice of IRM tends to be based on anecdotal evidence and conjecture about organisational information needs rather than hard facts. This paper describes a survey instrument, called the Information Health Survey, which wa...

The aim of this study is to evaluate the microleakage of repair materials MTA, IRM, and Biodentine applied on furcal perforations with different diameters. One hundred and forty extracted human teeth were used in this study. The teeth were divided into 2 main groups (60 teeth in each) which were then divided into 3 subgroups (n = 20). The remaining 20 teeth were divided into 2 groups (10 in eac...

OBJECTIVES This study investigated cellular attachment to 6 root-end filling materials as a measure of the biocompatibility of the materials. MATERIAL AND METHODS Class I retrograde cavities were prepared in root slices and these cavities were filled with the test materials, and incubated with Balb/C 3T3 fibroblasts for 24 h. Root slices with the cavities left empty served as the controls. Th...

This in vivo study compared the effect of mineral trioxide aggregate (MTA), IRM, Super EBA and ZOE in a puttylike consistency, used as retrofilling materials, in the healing process of periapical tissue of pulpless dogs' teeth submitted to a conventional retrofilling technique. Twenty-four premolars obtained from three dogs were used. At the first intervention, the animals were anesthetized, co...