نتایج جستجو برای: دندان metal structure
تعداد نتایج: 1743061 فیلتر نتایج به سال:
The optical propagation properties and magnetic polariton behaviors in perforated metal/dielectric layered structures are numerically investigated at near-IR region. A developed three-metal-layer (TML) structure is specially inspected as a simple case. Strong coupling effect of magnetic polariton is discovered in this system, which explains why TML structure reveals better negative-refraction p...
The structure of water on metal electrodes is addressed based on first-principles calculations. Special emphasis is paid on the competition between water-metal and water-water interaction as the structure determining factors. Thus the question will be discussed whether water at metal surfaces is iceor rather liquid-like. The proper description of liquid phases requires to perform thermal averag...
In many cases it may be thought, corrosion products cover the unique characteristics of ancient metal objects that are desirable to display. While the scientific point of view, the corrosion products as well as metal substrates are important and maintain the original topography of metal that have been replaced. In technical studies of the historical metal objects, the dense layers of corrosion ...
An ultra-thin nanostructured plasmonic light absorber with an insulator-metal-insulator-metal (IMIM) architecture is designed and numerically studied. The IMIM structure is capable to absorb up to about 82.5% of visible light in a broad wavelength range of 300-750 nm. The absorption by the bottom metal is only 6% of that of the top metal. The results show that the IMIM architecture has weak dep...
Metal ions play a functional role in numerous biochemical processes and cellular pathways. Indeed, about 40% of all enzymes of known 3D structure require a metal ion to be able to perform catalysis. The interactions of the metals with the macromolecular framework determine their chemical properties and reactivity. The relevant interactions involve both the coordination sphere of the metal ion a...
We study tunneling conductance of a graphene based normal metal-insulator-superconductor (NIS) junction with Corbino disk structure. Solving Dirac-Bogolioubov- De Gennes (DBdG) equation in different regions of the junction and employing scattering approach we obtain normal and Andreev reflection coefficients of the junction. Using Blonder-Tinkham-Klapwijk (BTK) formula we calculate tunneling co...
مقدمه و هدف حرارت تولید شده طی درمان های دندانپزشکی(مواد دندانی، تهیه حفره، اینسترومنت های چرخشی، لیزرهای با توان بالا و دستگاههای لایت کیور) امکان آسیب حرارتی به بافت های سخت و نرم دندان(مینا، عاج و پالپ) را مطرح می سازد. انتقال حرارت در دندان می تواند تحت تأثیر عواملی چون خصوصیات هندسی دندان ، ضخامت مینا وعاج، نوع ماده ترمیمی وجریان خون پالپی قرار گیرد. با توجه به تفاوت خصوصیات هندسی دندان ن...
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