نتایج جستجو برای: casting post and core

تعداد نتایج: 16917517  

Ebrahimi, Maziyar, Hosseini, Peymaneh, Khosravi, Kazem, Malekipoor, Mohammad reza, Savabi Isfahani, Omid,

Effects of core preparation time on the retention of cemented cast post Dr. O. Savabi Isfahani*-Dr. K. Khosravi**- Dr. M. Ebrahimi***- Dr. P. Hosseini***- Dr.MR. Malekipoor**** *- Associate Professor of Prosthodontics Dept.-Faculty of Dentistry – Isfahan University of Medical Sciences. **- Associate Professor of Operative Dentistry Dept.-Faculty of Dentistry – Isfahan University of Medical Scie...

2008
A. Pereira J. A. Pérez J. L. Diéguez G. Peláez J. E. Ares

The primary target of this project consists of combining the technique of rapid prototyping and casting to produce aluminum parts in a sand mold being made the corresponding models and core boxes by means of the technology of rapid tooling, FDM (fused deposition modeling) of ABS. The followed process to obtain the pieces is casting, that consists of the fused metal spill in a mold pattern previ...

2003
J. Wang A. G. Evans K. Dharmasena

The performance characteristics of a truss core sandwich panel design based on the 3D Kagom e has been measured and compared with earlier simulations. Panels have been fabricated by investment casting and tested in compression, shear and bending. The isotropic nature of this core design has been confirmed. The superior performance relative to truss designs based on the tetrahedron has been demo...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - دانشکده علوم انسانی 1390

this study was an attempt to investigate the effect of subtitling on vocabulary learning among iranian intermediate students. to find the homogeneity of the groups, tofel test was administered to student in kish mehr institute in garmsar. after analyzing the data, 60 participants (female students) who scored within the range of one standard deviation above and below the mean, were selected as h...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

abstract in first part of this project, the use of a new and biguanid-like catalyst supported on silica as a recyclable catalyst provides a new route for the synthesis of a variety of arylalkylidene rhodanine derivatives through knoevenagle reaction in at present of solvent at room temperature. rhodanine derivatives and especially arylalkylidene rhodanines have proven to be attractive compound...

پایان نامه :موسسه آموزش عالی غیردولتی رودکی تنکابن - دانشکده ادبیات و زبانهای خارجی 1383

abstract this study examined the relationship between noticing pronunciation and the improvement pronunciation by administering a 50 item story, as proficiency- test in order to investigate the effectiveness of noticing pronunciation on the improvement of pronunciation. accordingly 60 qualified students were selected and assigned to the two groups of experimental and control randomly, each gr...

Journal: :iranian endodontic journal 0
fariborz vafaee department of prosthodontics, dental school/dental research center, hamadan university of medical sciences, hamadan, iran masoumeh khoshhal department of periodontics, dental school, hamadan university of medical sciences, hamadan, iran. aliakbar rezaei department of prosthodontics, dental school, shahid beheshti university of medical sciences, tehran, iran. fereidon sooltani department of prosthodontics, dental school, shahid beheshti university of medical sciences, tehran, iran. mohsen jalal zadeh department of endodontics, dental school, hamadan university of medical sciences, hamadan, iran. ali yalpaniyan mechanical engineer msc, tehran, iran.

introduction: the resistance to fracture of endodontically treated teeth restored with esthetic post systems has not been extensively researched. this in vitro study compared the fracture patterns of endodontically treated teeth with esthetic post systems with different analysis methods. materials and methods: a total of 26 recently extracted human maxillary central incisors were decoronated an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیخ بهایی - دانشکده زبانهای خارجی 1399

this study aimed to investigate the effects of listening strategy training on iranian efl learners listening comprehension and use of such strategies. this work, employing an experimental methodology, was conducted among 60 adult efl learners from a language institute in isfahan, iran, as participants. the participants, who were selected based on the results of a placement test, were assigned t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

based on the latest records of typhlops vermicularis merrem, 1820 from iran, this species is distributed in the northern and southern regions of the country. in this study, new records of typhlops vermicularis are presented and it is shown that distribution range of this species is extended towards the eastern and western iran, and according to the new distribution map, it can be assumed that t...

Journal: :China Foundry 2021

Additive manufacturing is expected to transform and upgrade the traditional foundry industry realize integrated rapid low-cost development of high-performance components with complex shapes. The additive technology commonly applied in casting mold preparation (fusible molds, sand molds/cores ceramic cores) mainly includes selective laser sintering (SLS) binder injection three-dimensional printi...

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