Institution
Instituto Tecnológico de Aeronáutica
Education•São José dos Campos, Brazil•
About: Instituto Tecnológico de Aeronáutica is a education organization based out in São José dos Campos, Brazil. It is known for research contribution in the topics: Turbulence & Finite element method. The organization has 2062 authors who have published 3808 publications receiving 45532 citations. The organization is also known as: ITA & Instituto Tecnologico de Aeronautica.
Papers published on a yearly basis
Papers
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TL;DR: The demonstrated unidirectional phenomenon at the corresponding parity-time exceptional point on-a-chip confirms the feasibility of creating complicated on-chip parity- time metamaterials and optical devices based on their properties.
Abstract: Invisibility by metamaterials is of great interest, where
optical properties are manipulated in the real permittivity–
permeability plane. However, the most effective approach
to achieving invisibility in various military applications is
to absorb the electromagnetic waves emitted from radar to
minimize the corresponding reflection and scattering, such that
no signal gets bounced back. Here, we show the experimental
realization of chip-scale unidirectional reflectionless optical
metamaterials near the spontaneous parity-time symmetry
phase transition point where reflection from one side is
significantly suppressed. This is enabled by engineering the
corresponding optical properties of the designed paritytime
metamaterial in the complex dielectric permittivity
plane. Numerical simulations and experimental verification
consistently exhibit asymmetric reflection with high contrast
ratios around a wavelength of of 1,550 nm. The demonstrated
unidirectional phenomenon at the corresponding parity-time
exceptional point on-a-chip confirms the feasibility of creating
complicated on-chip parity-time metamaterials and optical
devices based on their properties.
1,253 citations
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TL;DR: The kinetic model for change of phases developed by M. Avrami at the end of the thirties has been used to describe the temporal behavior of phase changes as discussed by the authors.
Abstract: The kinetic model for change of phases developed by M. Avrami at the end of the thirties has been used to describe the temporal behavior of phase changes. Until today this model is studied and adapted to include broader hypotheses. However, the mathematical format presented by M. Avrami is difficult to be understood by beginners. The purpose of this work is to clarify the mathematical treatment of Avrami's work, going straightforward to the arguments that led to his main results.
1,208 citations
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TL;DR: A new method to divide a pool of samples into calibration and validation subsets for multivariate modelling is proposed, and the results of F-tests at 95% confidence level reveal that the proposed technique may be an advantageous alternative to the other three strategies.
666 citations
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TL;DR: EMPIRE as discussed by the authors is a modular system of nuclear reaction codes, comprising various nuclear models, and designed for calculations over a broad range of energies and incident particles, including direct, pre-equilibrium and compound nucleus ones.
636 citations
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Federal University of Ceará1, University of Minnesota2, King Abdulaziz City for Science and Technology3, Spanish National Research Council4, Instituto Tecnológico de Aeronáutica5, Sookmyung Women's University6, Kyung Hee University7, Nanjing University8, University of California, Los Angeles9, Nanyang Technological University10, University of Antwerp11, University of Notre Dame12, Purdue University13, Sungkyunkwan University14, IBM15
TL;DR: In this paper, a review of the basic physical principles of these various techniques on the engineering of quasi-particle and optical bandgaps, their bandgap tunability, potentials and limitations in practical 2D device technologies are provided.
Abstract: Semiconductors are the basis of many vital technologies such as electronics, computing, communications, optoelectronics, and sensing. Modern semiconductor technology can trace its origins to the invention of the point contact transistor in 1947. This demonstration paved the way for the development of discrete and integrated semiconductor devices and circuits that has helped to build a modern society where semiconductors are ubiquitous components of everyday life. A key property that determines the semiconductor electrical and optical properties is the bandgap. Beyond graphene, recently discovered two-dimensional (2D) materials possess semiconducting bandgaps ranging from the terahertz and mid-infrared in bilayer graphene and black phosphorus, visible in transition metal dichalcogenides, to the ultraviolet in hexagonal boron nitride. In particular, these 2D materials were demonstrated to exhibit highly tunable bandgaps, achieved via the control of layers number, heterostructuring, strain engineering, chemical doping, alloying, intercalation, substrate engineering, as well as an external electric field. We provide a review of the basic physical principles of these various techniques on the engineering of quasi-particle and optical bandgaps, their bandgap tunability, potentials and limitations in practical realization in future 2D device technologies.
434 citations
Authors
Showing all 2081 results
Name | H-index | Papers | Citations |
---|---|---|---|
Dan S. Henningson | 66 | 369 | 19038 |
M. A. Abdu | 58 | 322 | 11006 |
Philipp Schlatter | 48 | 368 | 11089 |
Tobias Frederico | 43 | 334 | 5278 |
Mário César Ugulino de Araújo | 39 | 209 | 6172 |
Shan-Gui Zhou | 38 | 180 | 5324 |
Jose A. Puppim de Oliveira | 35 | 228 | 6000 |
Mirabel Cerqueira Rezende | 35 | 242 | 4810 |
Evaldo José Corat | 33 | 229 | 4463 |
Renato M. Cotta | 33 | 273 | 4810 |
Roberto Kawakami Harrop Galvão | 31 | 184 | 3897 |
Lauro Tomio | 31 | 228 | 3120 |
C. de Conti | 31 | 67 | 3229 |
André V. G. Cavalieri | 30 | 192 | 2947 |
Vladimir Jesus Trava-Airoldi | 30 | 208 | 3701 |