Seasonality modulates the direct and indirect influences of forest cover on larval anopheline assemblages in western Amazônia

Serious concerns have arisen regarding urbanization processes in western Amazônia, which result in the creation of artificial habitats, promoting the colonization of malaria vectors. We used structural equation modelling to investigate direct and indirect effects of forest cover on larval habitats and anopheline assemblages in different seasons. We found 3474 larvae in the dry season and 6603 in the rainy season, totalling ten species and confirming the presence of malaria vectors across all sites. Forest cover had direct and indirect (through limnological variables) effects on the composition of larval anopheline assemblages in the rainy season. However, during the dry season, forest cover directly affected larval distribution and habitat variables (with no indirect affects). Additionally, artificial larval habitats promote ideal conditions for malaria vectors in Amazonia, mainly during the rainy season, with positive consequences for anopheline assemblages. Therefore, the application of integrated management can be carried out during both seasons. However, we suggest that the dry season is the optimal time because larval habitats are more limited, smaller in volume and more accessible for applying vector control techniques

EXTRAÇÃO DE SEMENTES DE RODOVIAS A PARTIR DE IMAGENS AÉREAS DIGITAIS

Este artigo apresenta uma metodologia para extração de sementes (segmentos) de rodovia a partir de imagens aéreas digitais, essas imagens geralmente possuem variações, o que envolve uma análise complexa e caracteriza um problema desafiador nessa área. A implementação do trabalho consistiu na aplicação técnicas para a detecção de possíveis sementes de rodovias. Este trabalho apresenta uma metodologia na eliminação de pontos inválidos da rodovia utilizando a aplicação do Algoritmo de Canny Modificado. Na segmentação dos pontos válidos para construção de sementes, foi aplicado o algoritmo de Douglas-Peucker. Na extração das rodovias, foram encontrados problemas em relação aos pontos válidos e inválidos das sementes e imagens que possuem estradas rurais. Foram realizados experimentos com imagens aéreas de rodovias para comprovar a metodologia proposta

COMPARAÇÃO DE MÉTODOS DE ANÁLISE MODAL EXPERIMENTAL APLICADO A UM PÓRTICO PLANO EM ESCALA REDUZIDA

Este trabalho tem como objetivo a comparação entre quatro métodos de análise modal experimental e a simulação numérica em elementos finitos. Os métodos Rational Fractional Polynomial (RFP), Ibrahim Time Domain (ITD), Circle-Fit e Line-Fit foram aplicados em um pórtico plano, de quatro pavimentos, em escala reduzida. A estrutura foi excitada por um martelo de impacto e a resposta de vibração foi medida por um acelerômetro piezoelétrico. A análise foi realizada em uma faixa de frequência de 0 a 400Hz. Os autovalores, autovetores e fator de amortecimento foram estimados e posteriormente comparados. Constatou-se que os resultados obtidos pelos métodos são compatíveis com o método dos elementos finitos (MEF) apesar. No geral entende-se que os quatro métodos apresentados podem ser aplicados para a identificação dos parâmetros modais da estrutura desde que se entenda as características e particularidades de cada método

Improvement of physical capacity and quality of life after liver transplantation: a longitudinal study

Sem informação198CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQSem informaçã

Academic development in technical high school courses in the north region of Brazil: overcoming obstacles and promoting engagement

Continuous development in academic learning can be hindered by rigid rules, resulting in a disconnection between students and the learning process. Promoting socialization and a sense of belonging in the academic environment contributes to student satisfaction. The ability to manage emotions is crucial when facing social challenges, preventing the emergence of emotional instabilities. This article presents a literature review that addresses the teaching and learning process. Based on this review, a structured questionnaire was developed and administered to 108 students from the integrated technical courses at the Tarauacá campus of IFAC, with the purpose of collecting relevant data on their perceptions, opinions, and experiences. Through this process, the psychological consequences of these aspects and their impact on academic performance and learning were aimed to be understood. Upon analyzing the selected studies and the questionnaire results, it is evident that there are practical, cognitive, and emotional challenges that affect students' learning process. To overcome these obstacles, it is important to address issues such as social pressure, differences in learning pace, and inappropriate practices, creating a positive learning environment and adapting pedagogical approaches to students' needs. The constructive approaches proposed in the reviewed studies positively influence students' academic performance, stimulating essential skills and promoting a holistic education. However, it is necessary to rethink the structure of education to keep students motivated, considering issues such as school dropout caused by challenges like remote campus location and financial limitations.Continuous development in academic learning can be hindered by rigid rules, resulting in a disconnection between students and the learning process. Promoting socialization and a sense of belonging in the academic environment contributes to student satisfaction. The ability to manage emotions is crucial when facing social challenges, preventing the emergence of emotional instabilities. This article presents a literature review that addresses the teaching and learning process. Based on this review, a structured questionnaire was developed and administered to 108 students from the integrated technical courses at the Tarauacá campus of IFAC, with the purpose of collecting relevant data on their perceptions, opinions, and experiences. Through this process, the psychological consequences of these aspects and their impact on academic performance and learning were aimed to be understood. Upon analyzing the selected studies and the questionnaire results, it is evident that there are practical, cognitive, and emotional challenges that affect students' learning process. To overcome these obstacles, it is important to address issues such as social pressure, differences in learning pace, and inappropriate practices, creating a positive learning environment and adapting pedagogical approaches to students' needs. The constructive approaches proposed in the reviewed studies positively influence students' academic performance, stimulating essential skills and promoting a holistic education. However, it is necessary to rethink the structure of education to keep students motivated, considering issues such as school dropout caused by challenges like remote campus location and financial limitations

INITIAL GROWTH AND NUTRIENT CONCENTRATION IN Eucalyptus urophylla x Eucalyptus grandis CLONES UNDER WEED INTERFERENCE

A presen\ue7a de plantas daninhas em plantios de eucalipto, especialmente nos dois primeiros anos, pode acarretar grandes preju\uedzos \ue0 produtividade, pois reduz a efici\ueancia de aproveitamento dos recursos de crescimento pela cultura. Assim, objetivou-se com este trabalho avaliar os efeitos da interfer\ueancia de plantas daninhas sobre o crescimento inicial de dois clones de Eucalyptus urophylla x Eucalyptus grandis e a concentra\ue7\ue3o foliar de nutrientes na cultura e nas plantas daninhas. O experimento foi instalado em esquema fatorial 2 x 5 + 7, sendo dois clones de h\uedbridos de Eucalyptus urophylla x Eucalyptus grandis, identificados como CNB001 e CNB016, em competi\ue7\ue3o com cinco plantas daninhas Urochloa decumbens (capim-braqui\ue1ria), Ipomoea nil (corda-de-viola), Commelina diffusa (trapoeraba), Spermacoce latifolia (erva-quente) e Panicum maximum (capim-coloni\ue3o). Adicionalmente, foram cultivados os dois clones de eucalipto e as cinco plantas daninhas em monocultivo como padr\ue3o de compara\ue7\ue3o, no delineamento inteiramente casualizado, com quatro repeti\ue7\uf5es. Foram avaliados eucalipto atrav\ue9s da altura de plantas, o di\ue2metro do coleto, o n\ufamero de ramos, a \ue1rea foliar, a mat\ue9ria seca e, o teor foliar de nutrientes do eucalipto, bem como o teor de nutrientes nas folhas das plantas daninhas. O clone CNB001 apresentou crescimento inicial superior ao clone CNB016, no entanto, livre da interfer\ueancia de plantas daninhas, verificaram-se teores foliares semelhantes para a maioria dos nutrientes em ambos os gen\uf3tipos. O clone CNB016 mostrou maior sensibilidade \ue0 interfer\ueancia negativa das plantas daninhas que o clone CNB001, sendo seu crescimento inicial mais afetado por Ipomoea nil e a concentra\ue7\ue3o de nutrientes reduzida pelas esp\ue9cies Panicum maximum, Urochloa decumbens e Commelina diffusa. Panicum maximum apresentou maior interfer\ueancia com o clone CNB001, enquanto Ipomoea nil pouco influenciou o crescimento e o teor de nutrientes deste h\uedbrido. As plantas daninhas apresentaram elevada capacidade de extrair nutrientes do solo, mesmo em conviv\ueancia com os clones de Eucalyptus urophylla x Eucalyptus grandis. A interfer\ueancia imposta \ue0 cultura \ue9 dependente da esp\ue9cie infestante e do gen\uf3tipo de eucalipto.The presence of weeds in eucalypt plantations, especially in the first two years, can result in losses of productivity because it reduces the efficiency of growth resource use by the crop. The objective of this study was to evaluate the effects of weed interference in two Eucalyptus urophylla x Eucalyptus grandis clones on initial growth and nutrient foliar concentration in the crop and weeds. The experiment was conducted in a factorial 2 x 5 +7 in which it used two clones of Eucalyptus urophylla x Eucalyptus grandis, identified as CNB001 and CNB016, competing with five weeds Urochloa decumbens , Ipomoea nil , Commelina diffusa , Spermacoce latifolia and Panicum maximum . Also the two eucalypt clones and the five weeds were grown in monoculture as a standard for comparison. It was used a completely randomized design with four replications. The eucalypt initial growth was evaluated by plant height, stem diameter, branches number, leaf area, dry matter and nutrient content in the leaves of eucalyptus. Nutrient concentration in leaves weed also was evaluated. The CNB001 clone showed initial growth upper at the clone CNB016. Free of weed interference both clones presented similar foliar contents for most nutrients. Clone CNB016 was more sensitive to competition with weeds than clone CNB001, being its initial growth most harmed by Ipomoea nil and concentration of nutrients reduced by Panicum maximum, Urochloa decumbens and Commelina diffusa. Panicum maximum showed greater interference with clone CNB001 while Ipomoea nil showed low negative influence in growth and nutrient concentration of crop. The weeds have high ability to extract nutrients from the soil in competition with Eucalyptus urophylla x Eucalyptus grandis clones. The interference imposed on the culture is dependent on weed species and eucalypt genotype

CRESCIMENTO INICIAL E CONCENTRAÇÃO DE NUTRIENTES EM CLONES DE Eucalyptus urophylla x Eucalyptus grandis SOB INTERFERÊNCIA DE PLANTAS DANINHAS

http://dx.doi.org/10.5902/1980509821099The presence of weeds in eucalypt plantations, especially in the first two years, can result in losses of productivity because it reduces the efficiency of growth resource use by the crop. The objective of this study was to evaluate the effects of weed interference in two Eucalyptus urophylla x Eucalyptus grandis clones on initial growth and nutrient foliar concentration in the crop and weeds. The experiment was conducted in a factorial 2 x 5 +7 in which it used two clones of Eucalyptus urophylla x Eucalyptus grandis, identified as CNB001 and CNB016, competing with five weed species Urochloa decumbens, Ipomoea nil, Commelina diffusa, Spermacoce latifolia and Panicum maximum. Also the two eucalypt clones and the five weeds were grown in monoculture as a standard for comparison. It was used a completely randomized design with four replications. The eucalypt initial growth was evaluated by plant height, stem diameter, branches number, leaf area, dry matter and nutrient content in the leaves of eucalyptus. Nutrient concentration in leaves weed also was evaluated. The CNB001 clone showed initial growth upper at the clone CNB016. Free of weed interference both clones presented similar foliar contents for most nutrients. Clone CNB016 was more sensitive to competition with weeds than clone CNB001, being its initial growth most harmed by Ipomoea nil and concentration of nutrients reduced by Panicum maximum, Urochloa decumbens and Commelina diffusa. Panicum maximum showed greater interference with clone CNB001 while Ipomoea nil showed low negative influence in growth and nutrient concentration of crop. The weeds have high ability to extract nutrients from the soil in competition with Eucalyptus urophylla x Eucalyptus grandis clones. The interference imposed on the culture is dependent on weed species and eucalypt genotype.http://dx.doi.org/10.5902/1980509821099A presença de plantas daninhas em plantios de eucalipto, especialmente nos dois primeiros anos, pode acarretar grandes prejuízos à produtividade, pois reduz a eficiência de aproveitamento dos recursos de crescimento pela cultura. Assim, objetivou-se com este trabalho avaliar os efeitos da interferência de plantas daninhas sobre o crescimento inicial de dois clones de Eucalyptus urophylla x Eucalyptus grandis e sobre a concentração foliar de nutrientes na cultura e nas plantas daninhas. O experimento foi instalado em esquema fatorial 2 x 5 + 7, sendo dois clones de híbridos de Eucalyptus urophylla x Eucalyptus grandis, identificados como CNB001 e CNB016, em competição com cinco espécies de plantas daninhas Urochloa decumbens (capim-braquiária), Ipomoea nil (corda-de-viola), Commelina diffusa (trapoeraba), Spermacoce latifolia (erva-quente) e Panicum maximum (capim-colonião). Adicionalmente foram cultivados os dois clones de eucalipto e as cinco plantas daninhas em monocultivo como padrão de comparação, no delineamento inteiramente casualizado, com quatro repetições. Foram avaliados o crescimento inicial de mudas de eucalipto através da altura de plantas, o diâmetro do coleto, o número de ramos, a área foliar e matéria seca, o teor foliar de nutrientes do eucalipto, bem como o teor de nutrientes nas folhas das plantas daninhas. O clone CNB001 apresentou crescimento inicial superior ao clone CNB016, no entanto, livre da interferência de plantas daninhas, verificaram-se teores foliares semelhantes para a maioria dos nutrientes em ambos os genótipos. O clone CNB016 mostrou maior sensibilidade à interferência negativa das plantas daninhas que o clone CNB001, sendo seu crescimento inicial mais afetado por Ipomoea nil e a concentração de nutrientes reduzida pelas espécies Panicum maximum, Urochloa decumbens e Commelina diffusa. Panicum maximum apresentou maior interferência com o clone CNB001, enquanto Ipomoea nil pouco influenciou o crescimento e o teor de nutrientes deste híbrido. As plantas daninhas apresentaram elevada capacidade de extrair nutrientes do solo, mesmo em convivência com os clones de Eucalyptus urophylla x Eucalyptus grandis. A interferência imposta à cultura é dependente da espécie infestante e do genótipo de eucalipto