CONTEXT AND AIMS The purpose of this study was to compare and evaluate the shaping ability of ProTaper (PT) and Self-Adjusting File (SAF) system using cone-beam computed tomography (CBCT) to assess their performance in oval-shaped root canals. MATERIALS AND METHODS Sixty-two mandibular premolars with single oval canals were divided into two experimental groups (n = 31) according to the system...

1 Overview To provide context for the discussions of centering that appear in this volume, we review our previous research on global focusing and centering and discuss central unsolved problems in the theory of centering. This paper does not provide a comprehensive review of work on centering, as this volume in its entirety serves that purpose. Rather we present our view of the history of cente...

The better the seismic performance of building joints, more lives and property can be preserved in earthquake disasters. This paper briefly introduced the basic structure self-centering reinforced concrete (RC) column-steel beam joints then prepared three types joint specimens. Specimen 1 was a self-centering RC column-steel joint, specimen 2 obtained by removing dampin...

I propose that tense and mood paradigms are grammatical centering systems. Specifically, English tenses form a temporal centering system, which monitors and updates topic times, whereas Kalaallisut moods form a modal centering system, which monitors and updates modal discourse referents. Nevertheless, English and Kalaallisut translation equivalents converge on the same truth conditions, due to ...

abstract this paper presents a robust approach using artificial neural networks in the form of a self organizing map (som) as a semi-automatic method for analysis and identification of morphometric features in two completely different environments, the man and biosphere reserve “eastern carpathians” (central europe) in a complex mountainous humid area and yardangs in lut desert, iran, a hyper a...

We investigate the relation between interior-point algorithms applied to two homogeneous self-dual approaches to linear programming, one of which was proposed by Ye, Todd, and Mizuno and the other by Nesterov, Todd, and Ye. We obtain only a partial equivalence of path-following methods (the centering parameter for the first approach needs to be equal to zero or larger than one half), whereas co...

Received: date / Revised version: date Abstract. We investigate the relation between interior-point algorithms applied to two homogeneous self-dual approaches to linear programming, one of which was proposed by Ye, Todd, and Mizuno and the other by Nesterov, Todd, and Ye. We obtain only a partial equivalence of path-following methods (the centering parameter for the first approach needs to be e...