PURPOSE The purpose of this study was to evaluate the effects of implant shape and bone preparation on the primary stability of the implants using resonance frequency analysis. METHODS Sixty bovine rib blocks were used for soft and hard bone models. Each rib block received two types of dental implant fixtures; a straight-screw type and tapered-screw type. Final drilling was done at three diff...

The choice of implant shape and size is an important part the treatment plan procedure in order to obtain that sta-ble masticatory function aesthetic function. use implants with a tapered design surface modification would improve ultimate stability low density bone. A comprehensiveand accurate radiographic examination also import-ant aspect dental planning. This article aimed present things abo...

A light cone efficiently transports, distributes, and concentrates the incoming radiation. I derive a formula for the spatial irradiance (or illuminance) distribution at the exit aperture of a tapered light pipe. The theory is demonstrated by Monte Carlo ray-tracing for lightpipes with light-emitting diodes at the input face. The analysis is based on the addition of the radiation patterns of th...

in this work, improved heat generation models are developed for straight and tapered shoulder geometries with different tool pin profiles in friction stir welding. the models are developed considering the welding process as a combination of the pure sliding and the pure sticking conditions. from the results, the amount of heat generation is directly proportional to the number of edges in the pi...

purpose: this article presents the results of study aimed at devising comprehensive, standard and objective criteria for measuring faculty members' workload. material & method: the indicators for measuring faculty members' workload were collected through a comprehensive review of the literature, a survey of the available documents and methods for measuring workload in the country, and faculty m...

Covariance matrix tapers have a long history in signal processing and related fields. Examples of applications include autoregressive models (promoting banded structure) or beamforming (widening the spectral null width associated with an interferer). In this paper, focus is on high-dimensional setting where dimension <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="ht...

INTRODUCTION The Thulium fiber laser has recently been tested as a potential alternative to the Holmium:YAG laser for lithotripsy. This study explores use of a short taper for expanding the Thulium fiber laser beam at the distal tip of a small-core fiber. METHODS Thulium fiber laser radiation with a wavelength of 1,908 nm, 10 Hz pulse rate, 70 mJ pulse energy, and 1-millisecond pulse duration...