242 research outputs found
Psychological correlates of exercise behavior among university students : a study at a major academic transition
Considerable research evidence for the psychological benefits of regular
exercise has been documented in the literature. Affective changes in the
mood and emotional states of individuals have also been reported and
related with healthy exercise behaviors. Looking for a closer examination of
the processes implicated in the behavioral intentions and involvement in
regular exercise, a major goal of this investigation was to study the
psychological correlates of exercise behavior among university students in
the transition from high school to university studies
Review of fiber-optic pressure sensors for biomedical and biomechanical applications
As optical fibers revolutionize the way data is carried in telecommunications, the same is happening in the world of sensing. Fiber-optic sensors (FOS) rely on the principle of changing the properties of light that propagate in the fiber due to the effect of a specific physical or chemical parameter. We demonstrate the potentialities of this sensing concept to assess pressure in biomedical and biomechanical applications. FOSs are introduced after an overview of conventional sensors that are being used in the field. Pointing out their limitations, particularly as minimally invasive sensors, is also the starting point to argue FOSs are an alternative or a substitution technology. Even so, this technology will be more or less effective depending on the efforts to present more affordable turnkey solutions and peer-reviewed papers reporting in vivo experiments and clinical trials.info:eu-repo/semantics/publishedVersio
Estabelecimento de colônias de Anastrepha obliqua (Diptera: Tephritidae) baseada em características morfológicas externas.
O gênero Anastrepha é um amplo táxon que apresenta distribuição tropical e subtropical, onde as espécies inseridas, nesse gênero, causam grandes prejuízos à fruticultura nacional. Dentre essas, as de maior importância econômica são A. obliqua Macquart e A. fraterculus (Wiedemann). A colonização de A. obliqua em laboratório pode servir a vários propósitos que vão desde pesquisa básica até extensos programas de controle, como por exemplo: a técnica do inseto estéril (TIE)
Análise das propostas de revisão do zoneamento bioclimático brasileiro: estudo de caso de Colatina, ES
Floral parts of Gomphrena globosa L. as a novel alternative source of betacyanins: Optimization of the extraction using response surface methodology
The present study describes a novel mechanical process for the pigmented parts of Gomphrena globosa
L. The effects of the variables of the maceration extraction of betacyanins have not been properly described.
Therefore, this study also aims to optimize the conditions that maximize betacyanins extraction from
G. globosa as an alternative source. Assisted by response surface methodology, an experimental design
was developed for testing the extraction variables (time, temperature, ethanol-water proportion and
solid-liquid ratio). The responses used were betacyanins quantification (by HPLC-PDA-MS/ESI and
spectrophotometric analysis), the extraction-yield and the colour intensity of the produced powder. The
betacyanins identified were gomphrenin and isogomphrenin II and III. The highest betacyanins content
( 45 mg/g) was obtained by 165 min, 25 C, 0% of ethanol and 5 g/L of solid-liquid ratio. The betacyanins
content from the floral parts of G. globosa is higher than those normally found in other sources highlighting
its industrial application.The authors thank the Foundation for Science and Technology
(FCT, Portugal) and FEDER under Programme PT2020 for financial
support to CIMO (UID/AGR/00690/2013) and L. Barros (SFRH/
BPD/107855/2015) grant. To POCI-01-0145-FEDER-006984 (LA
LSRE-LCM) funded by ERDF through POCI-COMPETE2020 and
FCT. To Xunta de Galicia for financial support for the postdoctoral
researcher of M.A. Prieto. The authors also thank Ana
Maria Carvalho for the plant donation and Celestino Santos-
Buelga for the preparative LC system utilisation
Registro de Tamarixia radiata (Hymenoptera: Eulophidae), parasitoide de Diaphorina citri (Hemiptera: Psyllidae), no estado da Bahia.
Tamarixia radiata (Waterston, 1922) (Hymenoptera: Eulophidae) é um inimigo natural de Diaphorina citri Kuwayama (Hemiptera: Psyllidae), o agente transmissor da devastadora doença dos citros: Huanglongbing (HLB).Anais web. Documentos eletrônicos
Fast computational processing for mobile robots' self-localization
This paper intends to present a different approach
to solve the Self-Localization problem regarding a RoboCup’s
Middle Size League game, developed by MINHO team
researchers. The method uses white field markings as key points,
to compute the position with least error, creating an error-based
graphic where the minimum corresponds to the real position,
that are computed by comparing the key (line) points with a
precomputed set of values for each position. This approach
allows a very fast local and global localization calculation,
allowing the global localization to be used more often, while
driving the estimate to its real value. Differently from the
majority of other teams in this league, it was important to come
up with a new and improved method to solve the traditional slow
Self-Localization problem.This work was developed at the Laboratório de Automação e Robótica by MINHO team´s researching and developing team, at University of Minho, under the supervision of Professor A. Fernando Ribeiro and A. Gil Lopes. The knowledge exchanging between the RoboCup’s MSL teams and community contributed greatly for the development of this work. This work has been supported by COMPETE: POCI-01- 0145-FEDER-007043 and FCT – Fundação para a Ciência e Tecnologia within the Project Scope: UID/CEC/00319/2013.info:eu-repo/semantics/publishedVersio
Motion control of mobile autonomous robots using non-linear dynamical systems approach
This paper presents a solution to the problem of motion control of an
autonomous robot, moving in a dynamical and unstable environment. It is based
on non-linear dynamical systems, modelling the state variables that define the
motion of a robot under an omnidirectional platform, like its direction of navigation
and velocity. The approach used, is based on a set of non-linear differential
equations that model the evolution of state variables along time, based on
the concept of attractors and repellers. In the official RoboCup Middle Size
League field, a target is used to attract the robot to a certain position (could be
the ball or a desired position to receive the ball), while a repeller could move
the robot away from its original path (given by obstacles in the surrounding environment).
The research was firstly carried out in a computational simulation
environment and later on with robots in a real environmentThis work was developed at the Automation and Robotics Laboratory by MINHO R&D TEAM, University of Minho, under the supervision of Professor A. Fernando Ribeiro and A. Gil Lopes. The knowledge exchanging between the RoboCup’s MSL teams and community contributed greatly for the development of this work. This work has been supported by COMPETE: POCI-01-0145-FEDER-007043 and FCT – Fundação para a Ciência e Tecnologia within the Project Scope: UID/CEC/00319/2013.info:eu-repo/semantics/publishedVersio
Pragas quarentenárias A1 e A2 da citricultura baiana.
As barreiras fitossanitárias impactam o setor produtivo e comercial de diversos países que pretendem exportar seus produtos agrícolas, em face das exigências que impõem a trânsito internacional de vegetais. Entretanto, essas normativas visam a proteger os importadores do ingresso e disseminação de pragas em seu território. A certificação fitossanitária de origem (CFO) e a permissão de trânsito de vegetais (PTV), documentos que atestam a sanidade e garantem a rastreabilidade das partidas, são exemplos das exigências fitossanitárias interestaduais. A Bahia, segundo lugar no ranking nacional de produção de citros, foi reconhecida pelo Ministério da Agricultura, Pecuária e Abastecimento (MAPA) como área de não ocorrência de várias pragas da citricultura, das quais muitas já foram introduzidas no Estado e estão restritas a microrregiões produtoras. Faz-se necessário avaliar o risco de disseminação e estabelecimento dessas pragas na Bahia, bem como estratégia de prevenção do ingresso daquelas que ainda não ocorrem no Estado.bitstream/item/103892/1/ComunicadoTecnico-156-cristiane-definitivo.pd
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