Sistemas de manejo e atributos físico-hídricos de um Latossolo Vermelho cultivado com milho

The purpose of this experiment was to evaluate the hydro-physical attributes of the Red Oxisol cultivated with maize in Jaboticabal, São Paulo State, Brazil, under different systems of use and periods of adoption of managements. The experiment was arranged in a completely randomized design with split-plot arrangement, with six replications and the treatments were: six years of no-tillage system (SPD6), eight years of no-tillage system (SPD8), ten years of no-tillage system (SPD10), conventional tillage system (SPC) and an adjacent area of native forest (NF). The soil penetration resistance (PR), density, macroporosity, microporosity of the soil in layers of 0-0.05; 0.05-0.10 and 0.10-0.20 m, and the saturated hydraulic conductivity (Kθ) in 0.15 m depth were evaluated. It was found that the PR conditions were favorable for the cultivation to 0.20 m, indicating a structure preserved even after soil chiseling. Furthermore, the Kθ in the soil showed similar behavior between SPC and periods of SPD, although this was shown in a part of maize cycle, macroporosity values near 0.10 m3 m-3 and soil water tensions near 0.09 MPa.

Digital proficiency and digital inclusion: Comparison between students of computer science, public relations and engineering

New information and communication technologies may be useful for providing more in-depth knowledge to students in many ways, whether through online multimedia educational material, or through online debates with colleagues, teachers and other area professionals in a synchronous or asynchronous manner. This paper focuses on participation in online discussion in e-learning courses for promoting learning. Although an important theoretical aspect, an analysis of literature reveals there are few studies evaluating the personal and social aspects of online course users in a quantitative manner. This paper aims to introduce a method for diagnosing inclusion and digital proficiency and other personal aspects of the student through a case study comparing Information System, Public Relations and Engineering students at a public university in Brazil. Statistical analysis and analysis of variances (ANOVA) were used as the methodology for data analysis in order to understand existing relations between the components of the proposed method. The survey methodology was also used, in its online format, as a research instrument. The method is based on using online questionnaires that diagnose digital proficiency and time management, level of extroversion and social skills of the students. According to the sample studied, there is no strong correlation between digital proficiency and individual characteristics tied to the use of time, level of extroversion and social skills of students. The differences in course grades for some components are partly due to subject 'Introduction to Economics' being offered to freshmen in Public Relations, whereas subject 'Economics in Engineering' is offered in the final semesters of Engineering and Information Systems courses. Therefore, the difference could be more tied to the respondent's age than to the course. Information Systems students were observed to be older, with access to computers and Internet at the workplace, compared to the other students who access the Internet more often from home. This paper presents a pilot study aimed at conducting a diagnosis that permits proposing actions for information and communication technology to contribute towards student education. Three levels of digital inclusion are described as a scale to measure whether information technology increases personal performance and professional knowledge and skills. This study may be useful for other readers interested in themes related to education in engineering. © 2013 IEEE.

Antioxidant effects of quercetin and naringenin are associated with impaired neutrophil microbicidal activity

Naringenin and quercetin are considered antioxidant compounds with promising activity against oxidative damage in human cells. However, no reports have described their effects on reactive oxygen species (ROS) production by phagocytes during microbicidal activity. Thus, the present study evaluated the effects of naringenin and quercetin on ROS production, specifically hypochlorous acid (HOCl), and their involvement in the microbicidal activity of neutrophils. Naringenin and quercetin inhibited HOCl production through different systems, but this inhibition was more pronounced for quercetin, even in the cell-free systems. With regard to the microbicidal activity of neutrophils, both naringenin and quercetin completely inhibited the killing of Staphylococcus aureus. Altogether, these data indicate that the decrease in the oxidant activity of neutrophils induced by these compounds directly impaired the microbicidal activity of neutrophils. Naringenin and quercetin exerted their effects by controlling the effector mechanisms of ROS production, with both positive and negative effects of these antioxidant agents in oxidative stress conditions and on ROS in the microbicidal activity of phagocytes. The present results challenge the traditional view of antioxidants as improvers of pathological conditions. © 2013 Francielli de Cássia Yukari Nishimura et al.

Utilização de sinais adicionais estabilizantes para o amortecimento de oscilações de baixa frequência do sistema elétrico de potência multimáquinas

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Desenvolvimento de uma ferramenta computacional de apoio ao ensino de sistemas eletrônicos digitais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Uso do sistema de cultivo bidimensional e tridimensional para diferenciação de células-tronco espermatogoniais e indução da espermatogênese in vitro em murinos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A dimensão valorativa da educação ambiental na formação continuada de professores apresentada em teses e dissertações brasileiras

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Dinâmica caótica e sincronização de fase em mapas acoplados

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fatores críticos de sucesso da gestão ambiental com foco em eco-eficiência energética: estudo de múltiplos casos em unidades prestadoras de serivços hospitalares

Pós-graduação em Engenharia de Produção - FEB

ALBA-TCP: uma cultura de integração regional alternativa para a América Latina?

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Uso do sistema de posicionamento global na caracterização planialtimétrica para projetos de irrigação e drenagem

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Comparação quantitativa da retração de caninos superiores utilizando dois sistemas de ancoragem

Pós-graduação em Odontologia - FOA

Computerization of maritime ports, e-commerce platforms and logistics communities

In the past few years there has been a clear trend of attaching increasing importance to "inforstructures", or the capacity of ports to process the information that accompanies foreign trade flows, so that the processing becomes a facilitating factor for trade, rather than an obstacle.This led to development of the concept of a port community system, which is a computerized system that interconnects all the members of a logistics community, making the exchange of documentation as effective as possible, reducing the volume of data to be re-entered in different systems and ultimately improving the whole process of monitoring an operation until its completion. Computerization of communications between all the actors at the ports facilitates integration of the community, while it also assists interaction between ports, thus forming logistics corridors.

Controle do percevejo castanho (Scaptocoris castanea Perty, 1830 (Hemiptera: Cydnidae)) na cultura da soja (Glycine max (L.) Merrill)

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Efeito do sistema de acabamento e polimento na rugosidade superficial e formação in situ de biofilme dentário inicial em cerâmica feldspática micro-particulada

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)