introduction: root canal obturation seals the root canal system to prevent re-entry and/or growth of microorganisms. the provision of an appropriate restoration to coronally seal the access cavity affects the success of endodontic treatment. the purpose of this study was to evaluate the coronal microbial leakage in root canals that were either filled by lateral compaction, guttaflow or warm ver...

Dynamic compaction (DC) is a widely used soil improvement method in dry and/or saturated soils. The design of DC treatment is usually carried out based on the past experiences and empirical relations. In order to clarify the ambiguities in DC processes, numerical modeling of DC in dry granular soils has been considered using a dynamic finite element code. Using the developed model, two design c...

For helpful comments and suggestions, we wish to thank Alan Garber, Dana Goldman, Geoffrey Joyce, Tomas Philipson, participants in the 2005 NBER Summer Institute Health Economics Workshop, and participants in the Fall 2006 NBER Health Care Program Meetings. We are grateful to the National Institute on Aging for funding. The views expressed herein are those of the author(s) and do not necessaril...

Partitioning and Reordering Techniques for Static Test Sequence Compaction of Sequential Circuits Michael S. Hsiaoy and Srimat T. Chakradharyy yDepartment of Electrical and Computer Engineering, Rutgers University, Piscataway, NJ yyComputer & Communications Research Lab. NEC USA, Princeton, NJ Abstract We propose a new static test set compaction method based on a careful examination of attribut...

OBJECTIVES The goal of this study was to compare the density of gutta-percha root fillings obturated with the following techniques: cold lateral (CL) compaction, ultrasonic lateral (UL) compaction, and warm vertical (WV) compaction. MATERIALS AND METHODS Thirty-three extracted mandibular first molars, with two separate mesial canals in each, were selected. After instrumentation, the canals we...

INTRODUCTION Root canal obturation seals the root canal system to prevent re-entry and/or growth of microorganisms. The provision of an appropriate restoration to coronally seal the access cavity affects the success of endodontic treatment. The purpose of this study was to evaluate the coronal microbial leakage in root canals that were either filled by lateral compaction, GuttaFlow or warm vert...

Intergranular pressure solution creep is an important deformation mechanism in the Earth's crust. The phenomenon has been frequently studied and several analytical models have been proposed that describe its constitutive behavior. These models require assumptions regarding the geometry of the aggregate and the grain size distribution in order to solve for the contact stresses and often neglect ...

We present an experimental study of the compaction dynamics for two-dimensional anisotropic granular systems. The compaction dynamics of rods is measured at three different scales: (i) the macroscopic scale through the packing fraction rho, (ii) the mesoscopic scale through both fractions of aligned grains phi(a) and ideally ordered grains phi(io), and (iii) the microscopic scale through both r...