BACKGROUND/AIM The Periotest method is a technique for the objective assessment of tooth mobility. The aims of this study were to determine normal Periotest values in the vertical and horizontal dimensions of periodontally healthy teeth in individuals aged 20-35 years and investigate the reliability of Periotest in terms of intra-series and inter-series reproducibility before and after applying...

Delta finite-type invariants are defined analogously to finite-type invariants, using delta moves instead of crossing changes. We show that they are closely related to the lower central series of the commutator subgroup of the pure braid group. 0. INTRODUCTION We consider in this paper delta finite-type invariants of knots and links (∆FT invari-ants). In the case of links, these are the same in...

In this paper we present a scalable protocol for conducting periodic probes of network performance in a way that minimizes collisions between separate probes. The goal of the protocol is to enable active performance monitoring of large-scale distributed computational systems and networks. We use the protocol to generate time series of measurement data that are then exposed to numerical forecast...