Effective Medium Approximation
Mostrando 1-6 de 6 artigos, teses e dissertações.
-
1. Optical absorption enhancement in sensitized ZnO nanorods for solar cells
ABSTRACTThe Optical Properties of ZnO Nanorods (NR) sensitized with different semiconductors in Core-Shell nanostructures were studied, comparing them with those of bare ZnO NR. Experimental measurements of Transmittance and Diffuse Reflectance show an increased light absorption at the solar spectrum and the appearances of new absorption edges (AE). The meas
Matéria (Rio J.). Publicado em: 2015-09
-
2. ESTUDO DO PARÂMETRO DE ORDEM E DO MOMENTO MAGNÉTICO EM BOROCARBETOS PSEUDOQUATERNÁRIOS / STUDY OF ORDER PARAMETER AND MAGNETIC MOMENT IN PSEUDOQUATERNARY BOROCARBIDES
Experimental data show that the dissolved impurities of the Mn presents a magnetic moment when substitute the Ni atom in pseudoquaternary borocarbide Y (Ni(1−x)Mx)2B2C, this is not observed if the impurities are Fe and Co. In this work we do a theoretical study of the superconducting order parameter variation and a possible formation of impurities magn
Publicado em: 2007
-
3. Concepção e estudo de um biofiltro para tratamento de compostos orgânicos voláteis COVs
In the last decade, biological purification of gaseous waste has become an important alternative to many conventional methods of exhaust air treatment. More recently, biofiltration has proved to be an effective and inexpensive method for the treatment of air contaminated with volatile organic compounds (VOCs). A biofilter consists in a reactor packed with a
Publicado em: 2005
-
4. Modelo de Anderson para duas impurezas : Metodo dos campos efetivos / The two-impurity Anderson model : an effective medium approach
O Hamiltoniano do modelo de Anderson para duas impurezas é estudado via um desacoplamento das funções de Green. Neste caso resulta ser equivalente a aproximação de potencial coerente (CPA) que também, neste caso, coincide com a aproximação Hubbard-I. Consideram-se todos os termos de interação impureza-impureza, tanto os denominados termos de um cor
Publicado em: 2004
-
5. Spontaneous insertion of polypeptide chains into membranes: a Monte Carlo model.
The Monte Carlo dynamics method was used to examine the process of protein insertion into model cell membranes. The water and lipid environments were taken into account via an effective medium approximation based on coordinate-dependent hydrophobic and hydrogen bond potentials. The polypeptide chain was represented in a full-backbone atom representation as a
-
6. Filamentary microstructure and linear temperature dependence of normal state transport in optimized high temperature superconductors
A filamentary model of “metallic” conduction in layered high temperature superconductive cuprates explains the concurrence of normal state resistivities (Hall mobilities) linear in T (T−2) with optimized superconductivity. The model predicts the lowest temperature T0 for which linearity holds and it also predicts the maximum superconductive transition
The National Academy of Sciences of the USA.