نتایج جستجو برای: metallic pollution

تعداد نتایج: 108784  

Journal: :Nano letters 2010
Peter B Catrysse Shanhui Fan

We investigate the use of nanopatterned metallic films as transparent conductive electrodes in optoelectronic devices. We find that the physics of nanopatterned electrodes, which are often optically thin metallic films, differs from that of optically thick metallic films. We analyze the optical properties when performing a geometrical transformation that maintains the electrical properties. For...

Journal: :Nanotechnology 2008
Chun Lan Pornsak Srisungsitthisunti Placidus B Amama Timothy S Fisher Xianfan Xu Ronald G Reifenberger

A technique of measuring contact resistance between an individual nanotube and a deposited metallic film is described. Using laser ablation to sequentially shorten the contact length between a nanotube and the evaporated metallic film, the linear resistivity of the nanotube as well as the specific contact resistivity between the nanotube and metallic film can be determined. This technique can b...

Journal: :International Journal of Geometric Methods in Modern Physics 2021

In this paper, we construct metallic Kähler and nearly structures on Riemannian manifolds. For such manifolds with these structures, study curvature properties. Also, describe linear connections the manifold which preserve associated fundamental [Formula: see text]-form satisfy some additional conditions present results concerning them.

1997
H. Choi-Yim W. L. Johnson

Composites with a bulk metallic glass matrix were synthesized and characterized. This was made possible by the recent development of bulk metallic glasses that exhibit high resistance to crystallization in the undercooled liquid state. In this letter, experimental methods for processing metallic glass composites are introduced. Three different bulk metallic glass forming alloys were used as the...

Journal: :Medicina oral, patologia oral y cirugia bucal 2009
Andre L F Costa Simone Appenzeller Clarissa-Lin Yasuda Fabrício R Pereira Verônica A Zanardi Fernando Cendes

OBJECTIVE Artifacts caused by metallic objects, such as dental crowns, dental implants and metallic orthodontic appliances, are a common problem in head and neck MRI. The aim of this retrospective study was to identify the main metal dental objects that produce artifacts on brain MRIs. STUDY DESIGN Imaged metallic artifacts and their sources were identified. Artifact image plane was rated on ...

2011
Ju-Young Kim Dongchan Jang Julia R. Greer

Homogeneous plasticity in metallic glasses is generally only observed at high temperatures or in very small structures (less than ≈ 100 nm), so their applications for structural performance have been very limited. Here, nanolaminates with alternating layers of Cu 50 Zr 50 metallic glass and nanocrystalline Cu are synthesized and it is found that samples with an optimal composition of 112-nm-thi...

2015
Joana Cotrim Susana Corujeira Joana Jardim Hélder Cardoso Eunice Trindade Jorge Amil Dias

INTRODUCTION Aspiration or ingestion of foreign bodies may occur during dental procedures. Diagnosis and management of these accidents is sometimes challenging. The authors present a small series of clinical cases. CASE 1 Adolescent observed due to suspected accidental bracket ingestion, not visible on x-ray, removed by upper digestive endoscopy. CASE 2 Adolescent observed after accidental ...

Journal: :Journal of the American Chemical Society 2012
Nathan T Jui Jeffrey A O Garber Fernanda Gadini Finelli David W C MacMillan

A new method to rapidly generate pyrrolidines via a SOMO-activated enantioselective (3 + 2) coupling of aldehydes and conjugated olefins has been accomplished. A radical-polar crossover mechanism is proposed wherein olefin addition to a transient enamine radical cation and oxidation of the resulting radical furnish a cationic intermediate which is vulnerable to nucleophilic addition of a tether...

2007
Marcia J. Carlson Frank F. Furstenberg Marcia Carlson Frank Furstenberg Laura Argys Kathie Harris Sigal Alon Christina Gibson Sarah Meadows

At the nexus of changing marital and fertility behavior is a new reality of contemporary family life—the fact that a significant fraction of adults today (will) have biological children by more than one partner, sometimes called ‘multi-partnered fertility.’ In this paper, we use data from the Fragile Families and Child Wellbeing Study to explore the consequences of multipartnered fertility for ...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2015
Eric Kirchner Ivo van der Lans Esther Perales Francisco Martínez-Verdú Joaquín Campos Alejandro Ferrero

For suitable illumination and observation conditions, sparkles may be observed in metallic coatings. The visibility of these sparkles depends critically on their intensity, and on the paint medium surrounding the metallic flakes. Based on previous perception studies from other disciplines, we derive equations for the threshold for sparkles to be visible. The resulting equations show how the vis...

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