نتایج جستجو برای: forward extrusion

تعداد نتایج: 130252  

2000
S.S.P. Shum W. S. Lau M.M.F. Yuen K. M. Yu

In this paper, a method called 2-stage extrusion is proposed to reconstruct a solid by modifying the incremental extrusion [Shum SSP. Solid reconstruction from orthographic opaque views using incremental extrusion. Computers & Graphics 1997;21(6):787±800; Shum SSP et al. A low-cost wireframe-to-solid implementation for reverse engineering. AUTOFACT'97 Conference, 3±6 November 1997, MS98(159), 1...

Journal: :Journal of visualized experiments : JoVE 2011
George T Eisenhoffer Jody Rosenblatt

Homeostatic maintenance of epithelial tissues requires the continual removal of damaged cells without disrupting barrier function. Our studies have found that dying cells send signals to their live neighbors to form and contract a ring of actin and myosin that ejects it out from the epithelial sheet while closing any gaps that might have resulted from its exit, a process termed cell extrusion¹....

2007
H. W. Müllner

In this contribution the influence of an extrusion process on the viscosity function of rubber blends is identified. This knowledge is required for performance of realistic numerical simulations of injection heads and extrusion tools for rubber profile production. The experimental basis of this investigation are tests with both, capillary and extrusion rheometer. The latter is a combination of ...

Journal: :The journal of contemporary dental practice 2017
Bhagyashree Thakur Ajinkya M Pawar Anda Kfir Prasanna Neelakantan

INTRODUCTION To assess the amount of debris extruded apically during instrumentation of distal canals of extracted primary molars by three instrument systems [ProTaper Universal (PTU), ProTaper NEXT (PTN), and self-adjusting file (SAF)] compared with conventional stainless steel hand K-files (HF, control). MATERIALS AND METHODS Primary mandibular molars (n = 120) with a single distal canal we...

2014
Hongxia Feng Xiaonan Sui Yunhe Chang Baokun Qi Yan Zhang Yang Li Lianzhou Jiang

To evaluate the effects of extrusion process on the trans fatty acids (TFAs) formation in soybean crude oils, three different extrusion parameters, namely, extrusion temperature (80-160 °C), feed moisture (10-26%), and screw speed (100-500 rpm), were carried out. It was found that only five different types of TFAs were detected out using gas chromatography-mass spectrometry. Before the extrusio...

2005
Han-Xiong Huang Song Lu HAN-XIONG HUANG SONG LU

Back-propagation (BP) neural network is used to develop process models for the parison extrusion in extrusion blow molding based on experimental data. In applying the BP network, some modifications, such as using a self-adaptive learning rate coefficient, determining the number of hidden neurons through experimentation, and so on, to the original BP algorithm are carried out to speed up learnin...

Journal: :iranian endodontic journal 0
hossein labbaf leilla shakeri reza orduei farshid bastami

i ntroduction: apical debris extrusion (de) subsequent to root canal instrumentation, is one of the most important causes of endodontic flare-ups. the aim of this study was to compare the amount of de after root canal instrumentation using nickel-titanium (niti) hand files with step-back manual technique or installed on reciprocating handpiece. methods and materials: this study was conducted on...

Journal: :journal of dentistry, tehran university of medical sciences 0
maryam ehsani babol university of medical sciences, robab farhang babol university of medical sciences, azadeh harandi babol university of medical sciences, saeid tavanafar general practitioner maryam raoof kerman university of medical sciences saeedeh galledar

objectives: during root canal preparation, apical extrusion of debris can cause inflammation, flare-ups, and delayed healing. therefore, instrumentation techniques that cause the least extrusion of debris are desirable. this study aimed to compare apical extrusion of debris by five single-file, full-sequence rotary and reciprocating systems. materials and methods: one hundred twenty human mandi...

Journal: :Journal of cataract and refractive surgery 2010
Leonardo Torquetti Paulo Ferrara

Reasons for intrastromal corneal ring segment explantation In their recent article, Ferrer et al. report that 57 of 250 implanted intrastromal corneal ring segments (ICRS) had to be explantedda rate of 22.8%. The main cause of this very high explantation rate was extrusion (48.3%). There are 2 major causes of ICRS extrusion: (1) superficial implantation of a segment and (2) a segment that is pl...

Journal: :Mycotoxins 2017

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