Results 81 to 90 of about 2,607 (224)

Angle-dependent SIBC model of metamaterial in FDTD method

, 2022
To control the diffraction of a target illuminated by a RADAR wave, one technique is to consider metamaterials. Simulating their behaviour can be complex especially when they are applied as thin heterogeneous layers on the surface of the target. This can be achieved, by first determining an angle-dependent surface impedance model, that is after ...
Gaucher, Samuel, Guiffaut, Christophe, Reineix, Alain, Cessenat, Olivier   +3 more
openaire   +1 more source

New approximation method for high order impedance boundary condition with surface integral equations for the scattering problem

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 37, Issue 3, May/June 2024.
Abstract In this paper, we propose a new method to approximate operators resulted from solving the scattering Problem in electromagnetism by dielectrically coated conducting bodies, using integral equations and high order impedance boundary condition. We introduce the variational Problem and we prove its well‐posedness.
Christian Daveau, Soumaya Oueslati, Molka Kacem   +2 more
wiley   +1 more source

Genesis and Classification of Nitisols from Volcano-Sedimentary Lithology in Northeastern Brazil

Revista Brasileira de Ciência do Solo, 2019
On the southern coast of Pernambuco State (PE), Brazil, lithotypes of the Cabo Basin (volcanic and sedimentary rocks), in association with the relief, allow the determination of the dynamics of the formation of Nitossolos Háplicos (Nitisols), including ...
Edivan Uchôa Cavalcanti da Costa, Jane Kelly Silva Araujo, Laércio Vieira de Melo Wanderley Neves, José Coelho de Araújo Filho, Juliet Emília Santos de Sousa, Marcelo Metri Corrêa, Mateus Rosas Ribeiro Filho, Valdomiro Severino de Souza Júnior   +7 more
doaj   +1 more source

Multiple logistic regressions: controlling factors in applications to soil class prediction. [PDF]

, 2014
Métodos mais eficazes para determinação do padrão de distribuição de classes de solo na paisagem precisam ser avaliados visando suprir a demanda por mapas de solo em escalas regional e global.
CATEN, A. Ten, DALMOLIN, R. S. D., MENDONÇA-SANTOS, M. de L., PEDRON, F. A.   +3 more
core  

Um sistema para organização de informações de solos brasileiros. [PDF]

, 2020
Com o objetivo de possibilitar o armazenamento e a disponibilização das informações sobre os solos brasileiros, a Embrapa Informática Agropecuária e a Embrapa Solos investem no desenvolvimento de um Sistema de Informações de Solos.
KUNINARI, F., OLIVEIRA, S. R. M., SILVA, F. O.   +2 more
core  

Multistage converter with reduced switch voltage stress and diode current stress

IET Power Electronics, Volume 17, Issue 5, Page 618-639, 8 April 2024.
In this research work, a new power circuit is proposed by modifying the circuitry of C‐MSI converter. The proposed power circuit is developed to achieve low switch voltage stress, low diode current stress, low cost, and high efficiency compared to C‐MSI converter.
M. S. Bhaskar, Umashankar Subramaniam, Dhafer Almakhles, Sivakumar Selvam, M. Muhibbullah   +4 more
wiley   +1 more source

Caracterização de um solo salinizado em área irrigada da região Semiárida

Revista Verde de Agroecologia e Desenvolvimento Sustentável, 2015
A expansão das áreas irrigadas no semiárido acarreta sérios problemas de degradação dos solos, principalmente de salinização, reduzindo a capacidade produtiva das culturas. A compreensão de aspectos pedológicos é fundamental durante o manejo dessas áreas.
A. F. M. Vital, R. V. Santos, J. A. Lopes, T. Muraoka   +3 more
doaj   +1 more source

ALTERAÇÕES NOS ATRIBUTOS QUÍMICOS DO SOLO PELO USO E MANEJO EM LATOSSOLO NA AMAZÔNIA

, 2017
The proper soil use and management are essential for a sustainable production, thus the pursuit for systems that minimize damages to the environment and improve soil fertility is continuous.
Marcos Rodrigues, F. H. Rabêlo, H. Castro, Delmonte Roborero, M. Carvalho, C. Roque   +5 more
semanticscholar   +1 more source

Caracterização morfológica de solos sódicos em diferentes paleodiques no pantanal norte. [PDF]

, 2014
O Pantanal é considerado a maior planície continental inundável do mundo, englobando diferentes habitats, sustentando grande diversidade vegetal e de solos, se destacando os solos sódicos (Planossolos e Luvissolos).
BEIRIGO, R. M., CHIAPIN, M., FURQUIM, S. A. C., NASCIMENTO, A. F. do, OLIVEIRA JUNIOR, J. C. de O., VIDAL-TORRADO, P.   +5 more
core  

Breaking Boundaries with Ceramic Matrix Composites: A Comprehensive Overview of Materials, Manufacturing Techniques, Transformative Applications, Recent Advancements, and Future Prospects

Advances in Materials Science and Engineering, Volume 2024, Issue 1, 2024.
Ceramic matrix composites (CMCs) are a category of advanced materials which have gained significant interest recently due to their remarkable mechanical and thermal characteristics. These composites are composed of ceramic fibers, particles, or other types of ceramics incorporated in a ceramic matrix and have shown the capability to be implemented in ...
Adib Bin Rashid, Mahima Haque, S. M. Mohaimenul Islam, K. M. Rafi Uddin Labib, Pavel Chowdhury, Rajesh Kannan A   +5 more
wiley   +1 more source