144 research outputs found

    Root system of ‘BRS Platina’ banana under irrigation levels and planting densities

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    Banana production stands out in Brazilian semiarid agriculture; however, due to little availability of water resources, associating water-saving technologies with knowledge on parameters involved in the interplay between plants and soil is critical to improving banana production systems. The objectives of this study were to evaluate the effect of planting densities and irrigation levels on root length density of ‘BRS Platina’ banana and to correlate root parameters to crop yield and leaf area. A randomized block design was used, with factors arranged in split plots and treatments replicated three times: four irrigation levels (55%, 70%, 85% and 100% ETc) were assigned to plots and four planting densities (1,600; 2,000; 2,666; and 3,333 plants ha-1) to subplots. Root length density (RLD) was measured at five distances from the pseudostem, longitudinally to a row of plants: 0.10, 0.25, 0.50, 0.75 and 1.10 m; and at three depths for each distance: 0 to 0.20 m, 0.20 to 0.40 m and 0.40 to 0.60 m from surface level. Root length densities were highest at 100% ETc irrigation level and at 2,666 plants ha-1 and 3,333 plants ha-1, within 0.31 m deep and within 0.78 m of the pseudostem. Irrigation interacts with root system, and coupled with higher planting densities, contributes to increasing crop yields of ‘BRS Platina’ banana plants.A bananicultura se destaca no setor agrícola do semiárido brasileiro, no entanto, com a baixa disponibilidade de água, torna-se necessário a associação de tecnologias que proporcionem alta eficiência de uso da água, e o conhecimento de parâmetros que inter-relacionam o sistema planta-solo é relevante para indicação de um sistema de produção. Assim, objetivou-se com este trabalho avaliar a densidade de comprimento de raízes de bananeira ‘BRS Platina’ sob diferentes densidades de plantio e lâminas de irrigação e as correlações com produtividade e área foliar. O delineamento experimental foi em blocos casualizados, em esquema de parcelas subdivididas, com três repetições, sendo quatro lâminas de irrigação (55%, 70%, 85% e 100% da ETc) na parcela e quatro densidades de plantio diferentes (1.600, 2.000, 2.666 e 3.333 plantas por hectare) na subparcela. A densidade de comprimento de raízes (DCR) foi analisada em cinco distâncias do pseudocaule, longitudinalmente à linha de plantas: 0,10 m, 0,25 m, 0,50 m, 0,75 m e 1,10 m e em três profundidades para cada distância: de 0 a 0,20 m, de 0,20 a 0,40 m e de 0,40 a 0,60 m da superfície do solo. Os maiores valores de DCR foram encontrados sob lâmina de irrigação de 100% da ETc, nas densidade de plantio de 2.666 plantas ha-1 e 3.333 plantas ha-1, em até 0,31 m de profundidade e até 0,78 m de distância do pseudocaule. A irrigação apresenta interação com sistema radicular que juntamente com a densidade de plantio contribuem para aumento da produtividade da ‘BRS Platina’

    A PERCEPÇÃO DE MORADORES ACERCA DO SISTEMA DE COLETA DE RESÍDUOS SÓLIDOS NO MUNICÍPIO DE MACAPÁ-AP

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     O sistema de coleta de resíduos sólidos é um dos componentes do serviço de saneamento básico essencial para a qualidade de vida da população, mantendo a cidade limpa e protegida de agentes infecciosos. O estudo tem por objetivo investigar a percepção de moradores acerca do sistema de coleta de resíduos sólidos em quatro bairros do município de Macapá/AP. Os quatros bairros estudados foram o Beirol, Brasil Novo, Centro e Muca. Utilizou-se o método qualitativo, com entrevistas semiestruturadas para moradores e para instituição responsável pela coleta; e método quantitativo, com o cálculo da amostra de domicílios a serem entrevistados na área de estudo. A percepção dos moradores nos bairros Beirol e Centro quanto ao sistema de coleta foi positiva, enquanto que nos bairros Brasil Novo e Muca houve relatos de problemas relacionados com a questão do lixo nas ruas dos bairros, porém em todos os bairros houve relatos de problemas referentes à limpeza urbana na área. Nas entrevistas evidenciaram-se diferenças na coleta em ruas do mesmo bairro, além de contradições nas respostas dos moradores

    Innovation management and port governance: An approach to models and practices in the world

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    The main objective of the research was to prospect the state of the art in the management of innovation and port governance in order to identify models and practices in the different ports around the world, through the international scientific bases Web of Science and Scopus, which allowed the exploratory study. More specifically, we sought to raise the level of development in the field of scientific production in the areas of innovation management and port governance. Scientometric methods were applied to prepare graphs that reflect the treatment of data and information generated from selected publications, as well as the search in the patent database of the National Institute of Industrial Property – INPI. In general, a gap in scientific production related to the researched field of knowledge was evidenced, which may be associated with the low level of port innovations which, therefore, may also reverberate in the search for patent protection. Thus, it is recommended that scientific productions be encouraged to support innovations in the port sector, in addition to incremental innovations, playing a prominent role in the collaborative action of agents in the port cluster and scientific, technological and innovation institutions (ICTs)

    Comparação de desempenho dos Sistemas de Informação Geográfica TerrSet e TerraView por meio de processamento digital de imagem / Performance comparison of Geographic Information Systems TerrSet and TerraView through digital image processing

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    O presente estudo teve como objetivo avaliar o desempenho dos Sistemas de Informação Geográfica (SIG) TerrSet e TerraView, executando a Classificação Supervisionada por Máxima Verossimilhança, por meio do comportamento espectral de imagens do satélite Landsat 5, associadas à comparação do uso e ocupação do solo da bacia hidrográfica do rio Capivara, localizada no município de Botucatu, estado de São Paulo, Brasil. As amostras de treinamento da classificação supervisionada foram definidas por sete classes de uso e ocupação do solo, baseadas no Manual Técnico de Uso da Terra do Instituto Brasileiro de Geografia e Estatística (IBGE). Na região da bacia hidrográfica do rio Capivara, existem diversos tipo de manejo com relação ao uso da terra, como culturas anuais em escala de subsistência em fazendas de pequeno e médio porte, até extensas áreas de monuculturas e agroindústrias, dessa forma, gerando um panorama de grande complexidade para mapear e posteriormente padronizar as classes de uso e ocupação do solo presentes na área de estudo. Outro agravamento para a metodologia empregada foi a presença de plantas daninhas encontradas em pastagens e áreas cultivadas, devido a interferência causadas pelas mesmas no comportamento espectral dessas classes de uso e ocupação do solo, provocando ruídos nas imagens, que alteram a resposta espectral das classes de culturas e pastagens, induzindo a erros de classificação no processo de análise das imagens. Outro fator evidente foi à diferença dos produtos derivados a partir da Classificação Supervisionada por Máxima Verossimilhança gerados nos softwares e posteriormente pós-classificados com os Filtros Majoritários, eliminando pixels inapropriados e permitindo uma menor inclusão de áreas de diferentes classes, alcançando dessa maneira acurácia superior a 50 % e gerando uma melhor classificação com menores erros e suavização dos mapas obtidos

    Stafne's Defect with Buccal Cortical Expansion: A Case Report

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    A rare case of Stafne's bone cavity, type III-G, is reported in a 49-year-old male patient who had been referred to a private clinic for a routine evaluation. The final diagnosis was based on computed tomography. Scintigraphy played a fundamental role in determining the most likely etiology

    Anomaly Detection in Industrial Machinery using IoT Devices and Machine Learning: a Systematic Mapping

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    Anomaly detection is critical in the smart industry for preventing equipment failure, reducing downtime, and improving safety. Internet of Things (IoT) has enabled the collection of large volumes of data from industrial machinery, providing a rich source of information for Anomaly Detection. However, the volume and complexity of data generated by the Internet of Things ecosystems make it difficult for humans to detect anomalies manually. Machine learning (ML) algorithms can automate anomaly detection in industrial machinery by analyzing generated data. Besides, each technique has specific strengths and weaknesses based on the data nature and its corresponding systems. However, the current systematic mapping studies on Anomaly Detection primarily focus on addressing network and cybersecurity-related problems, with limited attention given to the industrial sector. Additionally, these studies do not cover the challenges involved in using ML for Anomaly Detection in industrial machinery within the context of the IoT ecosystems. This paper presents a systematic mapping study on Anomaly Detection for industrial machinery using IoT devices and ML algorithms to address this gap. The study comprehensively evaluates 84 relevant studies spanning from 2016 to 2023, providing an extensive review of Anomaly Detection research. Our findings identify the most commonly used algorithms, preprocessing techniques, and sensor types. Additionally, this review identifies application areas and points to future challenges and research opportunities

    The prognostic value of worsening renal function and its timing

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    Copyright © 2023 Sociedade Portuguesa de Cardiologia. Publicado por Elsevier España, S.L.U. All rights reserved.INTRODUCTION: Acute decompensated heart failure (ADHF) admissions are frequently complicated by different patterns of serum creatinine (SCr) elevation. We aimed to assess the prognostic impact of worsening renal function (WRF) based on the timing of its occurrence. METHODS: This was a retrospective cohort of patients admitted for ADHF. Standard WRF was defined as an increase in SCr of ≥0.3 mg/dl during hospitalization. WRF timing was classified as early (within 48 hours of admission) or late (>48 hours). Acute kidney injury (AKI) at admission was defined as a rise in SCr of ≥0.3 mg/dl from outpatient baseline measurement to first measurement at admission. The primary endpoint was a composite of all-cause mortality or hospitalization for cardiovascular events at one-year follow-up. RESULTS: Overall, 249 patients were included (mean age 77±11 years, 62% with preserved left ventricular ejection fraction). Early WRF occurred in 49 patients (19.7%) and was associated with a higher risk of the primary outcome (HR 2.49; 95% CI 1.66-3.73), whereas late WRF was not (p=0.411). After stratification for the presence of early WRF and/or AKI at admission, only patients with early WRF but no AKI at admission and patients with both AKI at admission and early WRF showed a higher risk of the primary outcome after multivariate Cox regression. CONCLUSION: Early WRF was associated with a higher risk of the primary outcome. The timing of WRF seems to be an important factor to take into account when considering the prognostic impact of creatinine variations during hospitalization for ADHF.proofepub_ahead_of_prin

    Current knowledge and future prospects of lima bean (Phaseolus lunatus)-rhizobia symbiosis

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    Lima bean (Phaseolus lunatus) is an important species of the genus Phaseolus for human consumption in tropical regions. The seeds are important source of protein for people from South America, Africa and Mexico. In addition, as a legume plant, lima bean presents the ability to perform the biological nitrogen fixation (BNF) through the symbiosis with nitrogen-fixing bacteria. The studies about diversity and efficiency of lima bean-rhizobia symbiosis have increased worldwide, mainly in Latin America. These studies have shown Bradyrhizobium and Rhizobium as the main symbionts, although Sinorhizobium, Mesorhizobium and Allorhizobium have been found associated with lima bean. Also, there is a large variation in the efficiency of N fixation by the current isolates of rhizobia and some rhizobia have presented high capability for fixing N. This review aims to explore the studies about diversity and efficiency of rhizobia in symbiosis with lima bean.Lima bean (Phaseolus lunatus) is an important species of the genus Phaseolus for human consumption in tropical regions. The seeds are important source of protein for people from South America, Africa and Mexico. In addition, as a legume plant, lima bean presents the ability to perform the biological nitrogen fixation (BNF) through the symbiosis with nitrogen-fixing bacteria. The studies about diversity and efficiency of lima bean-rhizobia symbiosis have increased worldwide, mainly in Latin America. These studies have shown Bradyrhizobium and Rhizobium as the main symbionts, although Sinorhizobium, Mesorhizobium and Allorhizobium have been found associated with lima bean. Also, there is a large variation in the efficiency of N fixation by the current isolates of rhizobia and some rhizobia have presented high capability for fixing N. This review aims to explore the studies about diversity and efficiency of rhizobia in symbiosis with lima bean

    Efeito do tratamento dentinário com hipoclorito de sódio pós condicionamento ácido na resistência adesiva de restaurações em resina composta

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    Introduction: The development of squamous cell carcinoma of oral cavity (SCC) is a multifactorial process, where the cellular mutagenesis is determined by co-carcinogenetic agents like the human papillomavirus (HPV). Objective: the objective of this study is to identify the HPV in the SCC by means of polymerase chain reaction (PCR). Methods: twenty cases of SCC have been analyzed where the material used was extracted from specimens included in paraffin blocks of the Pathology Laboratory file of the São Vicente de Paulo Hospital of Passo Fundo/RS in the period of 2003 to 2007. They were all male cases and the 6th decade of life was the most prevalent. The lower lip was the region that comprises most of the defects and the histological grade "well-differentiated" from the World Health Organization was predominant. It has been detected the presence of HPV's DNA in four of the 20 cases of the SCC (20%). Conclusions: it can be assured that, by the fact of the HPV has been identified in a considerable percentage of cases of SCC, it can have influence on the genesis of the referred malignant neoplasia. So, more studies are necessary to define what is the possible role of HPV in the oral carcinogenesis. Este trabalho teve como objetivo avaliar a resistência adesiva de restaurações de resina composta, mediante a remoção ou não do colágeno dentinário. Para tanto, foram utilizados 24 dentes bovinos, embutidos em resina acrílica e desgastados até se obter um remanescente de 2mm de dentina. Delimitou-se a área da adesão em 3mm de diâmetro. As amostras foram divididas em 2 grupos: G1 (controle): foi aplicado o sistema adesivo autocondicionante Adper Prompt L-Pop (3M ESPE), seguindo as recomendações do fabricante, e procedida a restauração com a resina Z100 (3M) pela técnica incremental, em matriz metálica e sobre a área preparada; G2 (teste): realização de condicionamento com ácido fosfórico 37% por 15s, lavagem, secagem, aplicação de hipoclorito de sódio (NaOCl) 10% por 60s, lavagem, secagem, aplicação do sistema adesivo autocondicionante e realização da restauração, como descrito anteriormente. Os espécimes foram imersos em água destilada e mantidos em estufa bacteriológica a 37ºC por 7 dias, e então submetidos ao teste de cisalhamento em uma máquina de ensaio universal EMIC (velocidade de 0,5mm/min). Após análise estatística (ANOVA e teste T), os valores médios encontrados foram: G1=8,32±2,28 MPa e G2=5,76±2,48MPa (p

    Bloodstream infection by candida in patients with hematologic neoplasia: polyphasic taxonomy and antifungal susceptibility / Infecção sanguínea por candida em pacientes com neoplasia hematológica: taxonomia polifásica e suscetibilidade antifúngica

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    Bloodstream infection (BSI) by species of Candida has been identified as an important cause of death in patients with neutropenia who undergo chemotherapy for the treatment of hematologic malignancies This study aimed to verify the occurrence of bloodstream infections by Candida species in patients admitted to the haematology-oncology service of a public hospital specialized in the treatment of cancer in Northeast Brazil.  A total of 105 clinical samples from 62 patients with haematological malignancies were analyzed at the Laboratory of Medical Mycology at the Federal University of Pernambuco. Only 7 of 105 individuals were in the ICU environment. The mycological diagnosis was performed through automation (BACTEC 9120 / PHOENIX™), proteomic identification (MALDI-TOF MS) and molecular analysis (PCR). The antifungal susceptibility test followed the bloodstream infection recommendations of Clinical & Laboratory Standards Institute. Among the samples studied, nine strains (8,57%) were of the genus Candida, being six C. tropicalis and three C. albicans. The isolates were completely susceptible to the antifungal agents tested. Deaths occurred in 66,6% of the cases. Patients with hematologic malignancies hospitalized in intensive care and the state of septic shock present a higher risk of occurrence of BSI by Candida and death by this opportunistic pathogen
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