نتایج جستجو برای: diamond

تعداد نتایج: 20974  

2016
Victor I. Kleshch Stephen T. Purcell Alexander N. Obraztsov

Diamond has been considered to be one of the most attractive materials for cold-cathode applications during past two decades. However, its real application is hampered by the necessity to provide appropriate amount and transport of electrons to emitter surface which is usually achieved by using nanometer size or highly defective crystallites having much lower physical characteristics than the i...

2017
P A Nistor P W May

Progress made in the last two decades in chemical vapour deposition technology has enabled the production of inexpensive, high-quality coatings made from diamond to become a scientific and commercial reality. Two properties of diamond make it a highly desirable candidate material for biomedical applications: first, it is bioinert, meaning that there is minimal immune response when diamond is im...

2003
M. A. Davies C. J. Evans R. Vohra B. C. Bergner

The use of diamonds to generate precision patterns and precision surfaces on a micrometer or nanometer scale has a history that dates back centuries. Uses of diamond in semi-automated machinery can be traced to ruling machines, pantographs, and ornamental turning with “diamond turning” dating back about a century. Poor behavior in machining more common materials (e.g. ferrous alloys) has limite...

2015
Russell J Swan Julia M Byrd Daniel I Bettis Randall J Olson

PURPOSE To compare the consistency of incision architecture utilizing a traditional diamond keratome and a newly designed diamond keratome. METHODS We used a traditional diamond keratome and newly designed diamond keratome to create clear corneal incisions in human cadaveric donor eyes. Three surgeons with varying levels of experience made 30 incisions with each keratome; and the wound archit...

رئوفی, سعید, سبزقبائی, مهرنوش, عمید, رضا,

  Objective: Peri-implantitis is an irreversible inflammatory reaction in the soft and hard tissues around a functional implant . One of the treatment approaches of this disease include smoothing and polishing the rough surface and removing threads on the implants using rotary instruments, which is called implantoplasy. Clinicians should perform implantoplasty with caution because it may raise ...

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
سعید رئوفی saeed raoofi dental school, shiraz university of medical sciences, shiraz-iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شیراز. مهرنوش سبزقبائی mehrnoosh sabzeghabaie dental school, shiraz university of medical sciences, shiraz-iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شیراز. رضا عمید reza amid dental school, shahid beheshti university of medical sciences, tehran-iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید بهشتی.

objective: peri-implantitis is an irreversible inflammatory reaction in the soft and hard tissues around a functional implant . one of the treatment approaches of this disease include smoothing and polishing the rough surface and removing threads on the implants using rotary instruments, which is called implantoplasy. clinicians should perform implantoplasty with caution because it may raise th...

Alizadeh Oskuee, Parnian, Hoseini, Ali, Mohammadi, Narmin, Savadi Oskuee, Siavash,

The effect of mechanical surface conditioning methods on the shear bond strength of repaired composites Dr. P. Alizadeh Oskuee* - Dr. N. Mohammadi* - Dr. S. Savadi Oskuee* - Dr. A. Hoseini** *- Assistant Professor of Operative Dentistry Dept. - Faculty of Dentistry – Tabriz University of Medical Sciences. **- Dentist. Background and Aim: Considering the cost and quantity of tooth loss in the pr...

2003
Teruyuki MARUOKA Christian KOEBERL Jun-ichi MATSUDA Yasuhiko SYONO

available online at http://meteoritics.org 1255 © Meteoritical Society, 2003. Printed in USA. Carbon isotope fractionation between graphite and diamond during shock experiments Teruyuki MARUOKA,1†* Christian KOEBERL,1 Jun-ichi MATSUDA,2 and Yasuhiko SYONO3 1Department of Geological Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria 2Department of Earth and Science, Gradua...

2013
B. Kasi Viswanatha Sukadev Meher

Based on the study of motion vector distribution from several commonly used test image sequences,a three step diamond search [TSDS]algorithm for fast block matching motion estimation is proposed in this paper .The performance of this algorithm is compared with other existing algorithms by means of error metrics and no of search points in this the simulation results shows that the proposed three...

2015
Mohamed Ismaeel Maricar Ata Khalid D S R Cumming C H Oxley

A novel method of introducing a notch at a point of high magnetic field in a coplanar waveguide (cpw) radial and diamond stub resonator to increase the quality factor (Q) was analysed. For comparison both radial and diamond shaped cpw resonators with and without notches were fabricated on gallium arsenide (GaAs) semi-insulating substrate at the James Watt Nanofabrication Centre and tested in th...

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