نتایج جستجو برای: lathe
تعداد نتایج: 669 فیلتر نتایج به سال:
The main goal of this paper is to compensate the elastic deformations of the technological system in order to achieve maximum cross sectional accuracy and productivity of turning operation with minimum cost. This study was based on developing of mechanical adaptive system (MAS) for accuracy control by dynamic adjustment of the tool position during processing. The dynamic characteristic of compo...
Polyamide denture base materials are more flexible than the commonly used poly (methyl methacrylate) (PMMA). However polishability of polyamides has not been examined adequately. This study investigated the surface roughness (Ra) and clinical acceptability of samples of a polyamide denture base material and PMMA fabricated by injection moulding and traditional heat processing systems, respectiv...
The precise mechanism underlying the common 'physiological' jaundice of the newborn remains uncertain (Goldbloom and Gottlieb, 1929; Billing and Lathe, 1956; Lathe and Walker, 1957; Nelson, 1964). This study was based upon a previous suggestion that increased haemolytic activity operates in some cases, and that an increased urinary potassium concentration is one expression of this, continuing a...
Polishing of dental prostheses can cause a dangerous cycle of cross-contamination involving dentists, laboratory technicians, patients and auxiliary personnel. The aim of this study was to show the microbial contamination in the dental laboratory during the polishing procedure of complete dentures. For this purpose, 4 experiments were conducted. Experiment I -- Determination of the total colony...
Background and purpose: Eye injury is one of the main reasons for blindness and disability especially in working population. Every year, a lot of metal lathe operators bear severe occupational eye injures due to foreign bodies. Self-treatment in such cases results in many irreparable conditions. The goal of this study was to determine the frequency of cases who experienced foreign body in thei...
Relational Keyword Search (R-KwS) systems enable naive/informal users to explore and retrieve information from relational databases without knowing schema details or query languages. They take a keyword query, locate their corresponding elements in the target database, connect them using on PK/FK constraints. Although there are many such literature, most of only support queries with keywords re...
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