A Terminologia aplicada ao projeto INTAGRO nas perspectivas da organização e difusão da informação e da representação do conhecimento.

No contexto da agropecuária brasileira, o projeto Intagro (Intensificação Agropecuária em Pólos de Produção de Soja e Cana de Açúcar: Territorialidade, Sustentabilidade e Competitividade), desenvolvido pela Embrapa Informática Agropecuária, trata de questões referentes ao processo de intensificação agropecuária e suas relações com territorialidade, sustentabilidade e competitividade. Para esse fim, o projeto inclui estudos de diferentes abordagens que englobam aspectos agroambientais e socioeconômicos, bem como aqueles relacionados à disseminação e organização da informação, e à representação do conhecimento desse domínio. Nesse último aspecto, vêm sendo desenvolvidas atividades de cunho terminológico para subsidiar o processo de integração e apropriação dos conhecimentos gerados, variando desde a extração semiautomática até a definição do repertório de termos. Este trabalho apresenta a tarefa de descrição terminológica do conjunto dos termos, coletados no escopo desse projeto para servir de recurso terminológico complementar em diferentes iniciativas do setor agropecuário brasileiro

A terminologia aplicada ao projeto INTAGRO na perspectiva da organização e difusão da informação e da representação do conhecimento.

Este trabalho apresenta a fase final do processo de mapeamento e representação do conhecimento com viés terminológico sobre o domínio da intensificação agropecuária no Brasil. Usando o Ambiente e-Termos e a partir da compilação de um corpus textual e da extração automática de termos efetuada, foi criada uma taxonomia com 639 entradas que representa os conceitos e termos deste domínio que juntos serviram de base para a tarefa definitória deste processo. Os resultados finais contam com 93 fichas terminológicas preenchidas e 470 trechos definitórios que representam o início do mapeamento deste domínio do conhecimento com motivação terminológica.CIIC 2012. No 12617

Wideband tuning of four-wave mixing in solid-core liquid-filled photonic crystal fibers

We present an experimental study of parametric four-wave mixing generation in photonic crystal fibers that have been infiltrated with ethanol. A silica photonic crystal fiber was designed to have the proper dispersion properties after ethanol infiltration for the generation of widely spaced four-wave mixing (FWM) bands under 1064 nm pumping. We demonstrate that the FWM bands can be tuned in a wide wavelength range through the thermo-optic effect. Band shifts of 175 and over 500 nm for the signal and idler bands, respectively, are reported. The reported results can be of interest in many applications, such as CARS microscopy

Fiber Bragg Grating Sensor to Monitor Stress Kinetics in Drying Process of Commercial Latex Paints

In this paper, we report a study about the application of packaged fiber Bragg gratings used as strain sensors to monitor the stress kinetics during the drying process of commercial latex paints. Three stages of drying with distinct mechanical deformation and temporal behaviors were identified for the samples, with mechanical deformation from 15 μm to 21 μm in the longitudinal film dimension on time intervals from 370 to 600 minutes. Drying time tests based on human sense technique described by the Brazilian Technical Standards NBR 9558 were also done. The results obtained shows that human sense technique has a limited perception of the drying process and that the optical measurement system proposed can be used to characterize correctly the dry-through stage of paint. The influence of solvent (water) addition in the drying process was also investigated. The paint was diluted with four parts paint and one part water (80% paint), and one part paint and one part water (50% paint). It was observed that the increase of the water ratio mixed into the paint decreases both the mechanical deformation magnitude and the paint dry-through time. Contraction of 5.2 μm and 10.4 μm were measured for concentrations of 50% and 80% of paint in the mixture, respectively. For both diluted paints the dry-through time was approximately 170 minutes less than undiluted paint. The optical technique proposed in this work can contribute to the development of new standards to specify the drying time of paint coatings

Whispering Gallery Modes in Standard Optical Fibres for Fibre Profiling Measurements and Sensing of Unlabelled Chemical Species

Whispering gallery mode resonances in liquid droplets and microspheres have attracted considerable attention due to their potential uses in a range of sensing and technological applications. We describe a whispering gallery mode sensor in which standard optical fibre is used as the whispering gallery mode resonator. The sensor is characterised in terms of the response of the whispering gallery mode spectrum to changes in resonator size, refractive index of the surrounding medium, and temperature, and its measurement capabilities are demonstrated through application to high-precision fibre geometry profiling and the detection of unlabelled biochemical species. The prototype sensor is capable of detecting unlabelled biomolecular species in attomole quantities

Advances and new applications using the acousto-optic effect in optical fibers

This work presents a short review of the current research on the acousto-optic mechanism applied to optical fibers. The role of the piezoelectric element and the acousto-optic modulator in the excitation of flexural and longitudinal acoustic modes in the frequency range up to 1.2 MHz is highlighted. A combination of the finite elements and the transfer matrix methods is used to simulate the interaction of the waves with Bragg and long period gratings. Results show a very good agreement with experimental data. Recent applications such as the writing of gratings under the acoustic excitation and a novel viscometer sensor based on the acousto-optic mechanism are discussed

Aspectos semânticos da definição terminológica (DT): descrição linguística e proposta de sistematização

The making of the definitions is the most complex step in terminological research which aims to compile specialized dictionaries, for the good ones are evaluated mainly as to the quality of their definitions. As there are differences between terms and words, there are also differences between defining them. While the lexicographic definition specifies and describes the meanings of words as language units, giving all their possible senses, the terminological definition (TD) identifies and describes terms only in reference to the specific conceptual system to which they belong. Therefore, the TD is the object of this Master s study. Our undergraduate experience in terminological research in the Group of Studies and Research in Terminology (GETerm), revealed several difficulties associated with the TD process. The defining method was changed, adapted, extended, and revised to handle the challenges of the research. From that experience, we came to a set of methodological procedures to aid the TD routines in any domain knowledge. Accordingly, this Master s dissertation research aims to systematize those procedures to be implemented into a Web-based, computational environment (E-Termos) to aid research groups in their terminological endeavor.Universidade Federal de Minas GeraisA elaboração da definição é a etapa mais complexa e custosa numa pesquisa terminológica que objetiva a elaboração de dicionários especializados, já que um bom dicionário se avalia, principalmente, pela qualidade das suas definições. Assim como há diferença entre termo e palavra, também há diferenças entre os modos de definir termos e palavras. Enquanto a definição lexicográfica descreve e delimita os sentidos das palavras enquanto unidades do sistema, oferecendo todas as acepções possíveis, a definição terminológica (DT) oferece a identificação do termo somente com referência ao sistema conceitual do qual faz parte. É esse segundo tipo de definição, portanto, que é objeto desta pesquisa de mestrado. Na experiência adquirida durante nossa pesquisa terminológica realizada durante a Iniciação Científica, junto ao Grupo de Estudos e Pesquisas em Terminologia (GETerm), deparamo-nos com diversas dificuldades para a elaboração da DT. O método de trabalho foi por diversas vezes alterado, adaptado, ampliado, revisto, de forma a dar conta dos desafios que iam surgindo. A partir dessa experiência, chegamos a um conjunto de procedimentos metodológicos úteis para a redação da definição, em qualquer domínio de conhecimento. Pretendeu-se, pois, nesta pesquisa de mestrado, sistematizar esses procedimentos, de modo a proporcionar conhecimento linguístico que será implementado num ambiente computacional baseado na Web, de maneira a auxiliar demais grupos que desenvolvem pesquisas terminológicas em língua portuguesa a elaborar a DT de forma mais sistemática

Combined temperature and RI sensor for exploring the phase transitions of ethanol solutions

A fiber optic interferometer based on core diameter mismatch is used in reflection mode to study the behavior of ethanol solutions with regards to concentration dependent thermal properties and phase transitions. A method to simultaneously measure both temperature and ethanol concentration in systems with non-linear sensitivities has been developed and characterized. © OSA 2018 © 2018 The Author(s