نتایج جستجو برای: spherical cap or a hemisphere

تعداد نتایج: 13796117  

Journal: :Physical chemistry chemical physics : PCCP 2015
Maki Nakamura Ayako Oyane Ikuko Sakamaki Yoshie Ishikawa Yoshiki Shimizu Kenji Kawaguchi

In this paper, we have further developed our simple (one-pot) and rapid (short irradiation time) laser fabrication process of submicrometer spheres composed of amorphous calcium iron phosphate. In our previous process, laser irradiation was applied to a calcium phosphate (CaP) reaction mixture supplemented with ferric ions (Fe(3+)) as a light-absorbing agent. Because the intention of the presen...

2018
Teimuraz V. Zaqarashvili Eka Gurgenashvili

Eleven-year Schwabe cycle in solar activity is not yet fully understood despite of its almost two century discovery. It is generally interpreted as owing to some sort of magnetic dynamo operating below or inside the convection zone. The magnetic field strength in the dynamo layer may determine the importance of the tachocline in the model which is responsible for the cyclic magnetic field, but ...

Journal: :International Journal of Modern Physics D 2005

Journal: :Transactions of the American Mathematical Society 2021

In this paper we investigate the rigidity of ancient solutions mean curvature flow with arbitrary codimension in space forms. We first prove that under certain sharp asymptotic pointwise pinching condition solution a sphere is either shrinking spherical cap or totally geodesic sphere. Then show hyperbolic family spheres. also obtain result for nonnegatively curved form an integral condition.

1998
Vincent JOLIVET Dimitri PLEMENOS

The hemisphere subdivision technique is an importancedriven technique using a triangular adaptive subdivision of a hemisphere in order to guide the rays shot from a patch [17]. The purpose of this technique is to take advantage of the knowledge of an environment in order to optimise the space distribution of rays shot in radiosity algorithms. In this paper, we present a new approach of the hemi...

Journal: :Acta biomaterialia 2007
K C Baker J Drelich I Miskioglu R Israel H N Herkowitz

The effect of ultraviolet irradiation and glow discharge (GD) processing of the polyethylene (PE) substrates on deposition of calcium phosphate (CaP) films from supersaturated aqueous calcium phosphate solutions was investigated in this study. CaP coatings deposited on the PE substrates were comprised of elongated clusters of spherical particles and 100% of the free surface area of nearly all o...

2004
H. Haggrén H. Hyyppä O. Jokinen A. Kukko T. Pitkänen P. Pöntinen P. Rönnholm

Spherical imaging is a technical approach of collecting scenery by viewing it through a single perspective. A typical realization of spherical imaging is a panoramic mosaic covering a part of the hemisphere. According to a photogrammetric definition, we introduce here, spherical imaging is an exact central projection explicitly determined by its projection center. They are linear images without...

2017
Kyoung Dan Son Young-Jin Kim

BACKGROUND Calcium phosphate (CaP) based nanoparticles are considered to be ideal drug carriers for delivery of anticancer drugs because of their excellent biocompatibility and pH responsiveness. However, CaP nanoparticles have the problems of limited drug load capacity, initial burst release, and short-term release. Thus, we prepared the CaP nanocomposites containing anticancer drug such as ca...

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