1,726,285 research outputs found
Fluxos de nutrientes e agrotóxicos nos recursos hídricos sob diferentes usos de terra na bacia do rio Jardim, Distrito Federal.
No full textEditores técnicos Eduardo Cyrino de Oliveira-Filho, Fernando Antônio Macena da Silva, Maria Lucia Meirelles, Eduardo Alano Vieira, Geraldo Bueno Martha Junior, Arminda Moreira de Carvalho, José Carlos Sousa e Silva, CPAC
Understanding human immunology through the study of primary immune deficiency disorders
Get PDFHet afweersysteem heeft de bijna onmogelijke opdracht om schadelijke indringers aan te pakken zonder schade toe te brengen aan het lichaam zelf. João de Oliveira Filho richtte zich in zijn onderzoek op zeldzame ziekten waarbij een genetische afwijking een grotere gevoeligheid veroorzaakt voor infecties en auto-immuunziekten. Onderzoek naar dergelijke aandoeningen kan veel duidelijk maken over de werking van het afweersysteem. Oliveira Filho keek naar de afwijking ALPS of het Autoimmune Lymphoproliferatieve syndroom. ALPS-patiënten zijn in staat indringers op te sporen en te vernietigen, maar de cellen die deze taak voor hun rekening nemen, sterven daarna niet af. De Oliveira Filho ontdekte dat mutaties in specifieke genen ALPS-achtige verschijnselen kunnen veroorzaken. Ook ontdekte hij nieuwe stoffen die kunnen helpen bij de exacte diagnose van de ziekte
Relatório de pesquisa - demarcação e reafirmação étnica: uma visão do antropólogo sobre o processo de criação de áreas indígenas
Get PDFO relatório apresenta como anexo:
Almeida, Alfredo Wagner Berno de. GETAT: segurança nacional e o revigoramento do poder regional. Revista FIPES, n.1, v.2, p.37-58, jul./dez. 1980.
Oliveira Filho, João Pacheco de. Os índios e a questão fundiária. Tempo e Presença, n.182, p.17-19, maio 1983.
Oliveira Filho, João Pacheco de. Terras indígenas no Brasil: uma tentativa de abordagem sociológica. Boletim do Museu Nacional, n.44, out. 1983.
Oliveira Filho, João Pacheco de. Brasil: tierra de indio. Boletin IWGIA, v.4, n.112, p.25-33, ene./jul. 1984.
Oliveira Filho, João Pacheco de. Demarcação: os direitos indígenas à terra. Aconteceu Especial ´Povos Indígenas no Brasil, 1983.
Oliveira Filho, João Pacheco de. A demarcação de áreas indígenas: possibilidades e perspectivas. Comunicação apresentada ao Simpósio Índios e Estado, Brasília, nov. 1984.
Almeida, Alfredo Wagner Berno de. As áreas indígenas e o mercado de terras. Rio de Janeiro, 1985.Relatório de pesquisa dos antropólogos João Pacheco de Oliveira Filho e Alfredo Wagner Berno de Almeida, sobre as ações da Funai para identificação e demarcação de Terras Indígenas, as implicações do Estatuto na terra, a situação fundiária e os interesses econômicos financeiros envolvidos, anexo publicações, que dão subsídios dos temas.CEV - Comissão Estadual da VerdadeCom boa leitur
Multivariate statistical analysis for water quality assessment: a review of research published between 2001 and 2020.
Get PDFAbstract: Research on water quality is a fundamental step in supporting the maintenance of environmental and human health. The elements involved in water quality analysis are multidimensional, because numerous characteristics can be measured simultaneously. This multidimensional character encourages researchers to statistically examine the data generated through multivariate statistical analysis (MSA). The objective of this review was to explore the research on water quality through MSA between the years 2001 and 2020, present in the Web of Science (WoS) database. Annual results, WoS subject categories, conventional journals, most cited publications, keywords, water sample types analyzed, country or territory where the study was conducted and most used multivariate statistical analyses were topics covered. The results demonstrate a considerable increase in research using MSA in water quality studies in the last twenty years, especially in developing countries. River, groundwater and lake were the most studied water sample types. In descending order, principal component analysis (PCA), hierarchical cluster analysis (HCA), factor analysis (FA) and discriminant analysis (DA) were the most used techniques. This review presents relevant information for researchers in choosing the most appropriate methods to analyze water quality data.Na publicação: Daphne H. F. Muniz; Eduardo C. Oliveira-Filho
Peer review report for: Expectations, economic uncertainty, and sentiment
No full textPEER REVIEW REPORT FOR:
Franco, D. M. (2022). Expectations, economic uncertainty, and sentiment. Revista de Administração Contemporânea, 26(5), e210029. https://doi.org/10.1590/1982-7849rac2022210029.en
HOW TO CITE THIS PEER REVIEW REPORT:
Franco, D. M., & Oliveira Filho, B. G. (2022). Peer review report for: Expectations, economic uncertainty, and sentiment. RAC. Revista de Administração Contemporânea. Zenodo. https://doi.org/10.5281/zenodo.6399108
REVIEWERS:
Bolivar Godinho de Oliveira Filho (Universidade Federal de São Paulo, Brazil)
And three anonymous reviewers
Tropicoporus flabellatus V. R. T. Oliveira, J. R. C. Oliveira-Filho, Xavier de Lima & Gibertoni 2022, sp. nov.
No full textTropicoporus flabellatus V.R.T. Oliveira, J.R.C. Oliveira-Filho, Xavier de Lima & Gibertoni, sp. nov. This species is characterized by the thin flabelliform basidioma, presence of hymenial setae, pores 7-9/mm and basidiospores 4.5-5 Μm long. MYCOBANK NUMBER. — MB 837432. HOLOTYPE. — Brazil, Alagoas State, Quebrangulo City, REBIO de Pedra Talhada, on dead wood, 9°15’00.7”S, 36°25’38.3”W, 758m, 25.VII.2019 V. R. T. Oliveira, (URM [URM94338]). ADDITIONAL SPECIMENS EXAMINED. — Brazil, Pernambuco State, Recife, Recife’s Botanical Garden, on dead wood, 17. VI.2016, J. R. C. Oliveira-Filho, as Inonotus cf. pseudoradiatus (URM [JB 7]) ETYMOLOGY. — “ Flabellum ” (Latin) meaning “small fan”. Referring to shape of the basidioma. HABITAT AND DISTRIBUTION. — Tropical, ombrophilous broadleaf forest. DESCRIPTION Basidioma (Fig. 6A) perennial, pileate, sessile, dimidiate, solitary to imbricate, applanate to slightly convex in section (Fig. 6B), 2.9-3.5 cm wide, 2.1-2.8 cm long, 0.5-0.9 cm thick at the base, hard, twisting when dry. Pileus surface radially folded, often with projections; initially velutinate, but soon wearing in narrow black and brown concentric zones. Margin acute. Pore surface (Fig. 6C) dark brown to brownish-yellow near the margin, pores round, 7-9/mm; margin sterile, brownish-yellow. Context 0.3-0.5 cm thick at the base, golden-brown, duplex, with a thin black line near the pilear surface.Tubes golden-brown, slightly darker than the context, indistinctly stratified (up to three layers in the holotype), old tubes filled with concolorous mycelia. Context and tubes turning immediately purplish-black in contact with KOH 3%, drying out remaining as a dark spot. Hyphal system in the context monomitic, generative hyphae simple and mostly regularly septate, sparingly branched, hyaline, yellow, golden yellow in water and rusty brown in KOH, mostly thick-walled with wide to narrow lumen, rarely hyaline and thin-walled, 3-5.5 Μm in diameter, wall up to 1.5 Μm thick; black line is composed by dark reddish-brown, more densely agglutinated and intertwined hyphae (Fig. 6H); below the line, hyphae grow parallel to the pilear surface, near the tube they grow downwards to form the tube trama, and above the line, hyphae concolorous or slightly darker, growing upwards to compose the tomentum. Tomentum hyphae straight, thick-walled with a wide lumen, yellow to dark yellow in water, rusty brown in KOH 3%, 3-5.5 Μm diameter, richly septate, ends obtuse or clavate, mostly broken (Fig. 6I). Tube trama dimitic, hyphae growing straight, perpendicular to the pilear surface, generative hyphae hyaline to yellow, thin to slightly thick-walled, 2.5-4 Μm in diameter, skeletal hyphae (Fig. 6G) golden yellow in water, brownish-yellow in 3% KOH, thick-walled with a narrow lumen, wall up to 2 Μm thinning out towards the apex, unbranched, 3.5-4.5 Μm in diameter. Hymenial setae (Fig. 6D) rare in the holotype, 10-20 × 6-8.5 Μm brownish yellow in water, dark rusty-brown in KOH 3%, originating in the trama, near pore mouths, projecting inside the tube or immersed in the trama. Cystidiole not observed. Basidia tetrasterigmate, subglobose, 7-9 × 5-6 Μm. Basidiospores (Fig. 6E) ellipsoid with a flattened side, 4.5-5 × 3.5-4 Μm (Q = 1.12-1.42), thick-walled, smooth, pale yellow in water and golden yellow in 3% KOH, CB-, IKI-. REMARKS The thin and small basidiomata, and the small pores characterize this species. Although perennial, the formation of a dark crust was not observed in older parts of the pileus surface. The other known neotropical pileate Tropicoporus with small pores is T. guanacastensis (7-8/mm, Zhou et al. 2016). However, T. guanacastensis produce harder and thicker basidiomata, and a crust in the upper surface that cracks with age. Although pileate, T. flabellatus V.R.T. Oliveira, J.R.C. Oliveira-Filho, Xavier de Lima & Gibertoni, sp. nov. is placed within the T. tropicalis clade, which is composed by resupinate species, making it readily distinguishable from this speciesPublished as part of X, Vitor, Lima, avier de, T, Virton Rodrigo, Oliveira, argino de, C, Nelson, Lima-Júnior, orreia de, C., José Ribamar, Oliveira-Filho, Santos, Carla, Lima, Nelson & Gibertoni, Tatiana Baptista, 2022, Taxonomy and phylogenetic analysis reveal one new genus and three new species in Inonotus s. l. (Hymenochaetaceae) from Brazil, pp. 1-21 in Cryptogamie, Mycologie 20 (1) on pages 10-12, DOI: 10.5252/cryptogamie-mycologie2022v43a1, http://zenodo.org/record/782880
Instrumented open-source filament extruder for research and education
No full textExtruders are necessary equipment for 3D filament manufacturing, which is considered a clean technology, because it has less scrap and can reuse materials, increasing its life cycle. Open-source extruders are less expensive than industrial extruders. However, they have little instrumentation, which limits the analysis of the processing and, consequently, the development of new materials, screw design and process control. Therefore, this project aims to develop a low-cost extruder with a high degree of instrumentation. To achieve this, equipment with a circuit board was developed, with modularity, machine and peripherals control, process stability, and data acquisition. To validate the equipment, the processing was done at constant temperature and with flow variation. The data obtained were temperatures in different points of the barrel, the rotation speed of the extruder motor, current consumed by the motor and by the resistances, and the speed of the puller motor. Thermal images of the components were taken during processing, validating the type of material used in the parts manufactured by additive manufacturing. The ABS filament produced was analyzed by flow and surface analysis using a confocal microscope
Possibilidades didáticas motivadoras para o ensino da matemática
Get PDFArtigo AcadêmicoNão possuiste artigo propõe-se refletir sobre as possibilidades didáticas motivadoras
para o ensino da matemática. É relevante salientar que todo docente precisa
entender que na verdade a vida é uma caminhada de aprendizagens, cada dia
aprendemos um pouco uns com os outros, e em meio a esse contexto de
expansão de conhecimentos, ou seja, da ciência de uma forma geral, o docente
precisa está reavaliando continuamente sua prática em sala de aula. Assim,
nesta perspectiva, as ferramentas utilizadas como suporte aos processos de
ensino aprendizagem, alinhando-se com as tecnologias e a história para utilizálas
em benefício dos alunos, percebe-se que as possibilidades didáticas
motivadoras no ensino da matemática são imensas, e estão aí para nos
proporcionar interação, dinamismo no processo de ensino aprendizagem da
matemática.Trabalho não financiado por agência de fomento, ou autofinanciad
Data files and code related to the upper bound for Witsenhausen's parameter
No full textData files and programs to generate and check upper bounds for Witsenhausen's parameter using the completely positive hierarchy
Formal verification of upper bounds on translative packing densities
No full textPacking problems are concerned with filling the space with copies of a certain object, so that the least amount of space stays unoccupied. The famous Kepler conjecture asserts that the cannonball packing of spheres is the most efficient packing achievable, and was recently formally proven by Hales.Dostert, Guzman, Oliveira Filho and Vallentin investigated the packing problem for other shapes. They focused on translative packings, in which all objects are oriented in the same direction. They proved several new upper bounds on translative packing densities of various Platonic and Archimedean solids. However, their results rely heavily on complex computer calculations to ensure they satisfy the conditions of a theorem.In this thesis, proof assistant Coq is used to formally verify these conditions. An introduction to Coq is provided, aimed at the working mathematician. Then, the theorems required for the proof are developed. Several results from multivariate calculus and convexity were required for the proof, but not available in Coq. The proof also requires a large amount of floating point calculations. A method is developed to efficiently perform floating point calculations on a large scale in Coq.Using the developed techniques, the improved upper bound of Dostert et al. on the translative packing density of the truncated tetrahedron is formally verified. These techniques can be reused to formally verify the other improved upper bounds of Dostert et al
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