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au:Rosa, Roger S.

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Models for predicting the performance of fertilizer metering in seed cum fertilizer drill
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Spagnolo, Roger T.

; Rosa, David P. da

; Pinho, Marivan da S.

; Schiavon, Cheiner S.

; Schmechel, Diego

Revista Brasileira de Engenharia Agrícola e Ambiental

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jan 2021, Volume 25 N. 1 Pages 51 - 57

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Objetivou-se neste estudo estabelecer modelos matemáticos preditivos do desempenho de dosadores helicoidais de fertilizantes em função das inclinações longitudinal e transversal, velocidade angular e passo dos helicoides. Foram realizados testes em laboratório com dosadores helicoidais por transbordo lateral, longitudinal e com dois helicoides, trabalhando na velocidade angular de 16 e 46 rpm nos seguintes ângulos de inclinação longitudinal: -20, -15, -10, -5, 0, +5, +10, +15 e +20° e no eixo transversal: -15, -10, -5, 0, +5, +10 e +15°. Verificou-se que a variação da inclinação transversal pouco interfere na dosagem. Quando utilizados dosadores com um helicoide, quanto maior a inclinação longitudinal maior a dosagem de forma linear, enquanto o dosador com dois helicoides proporcionou menor oscilação das dosagens em função das inclinações testadas.

ABSTRACT This study aimed to establish mathematical models that predict the performance of helical fertilizer metering according to the longitudinal and transverse inclinations, angular speed, and helical pitch. Laboratory tests were carried out with helical meterings with lateral and longitudinal discharge through overflow and with two helicoids, working at an angular speed of 16 and 46 rpm at the following longitudinal inclination angles: -20, -15, -10, -5, 0, +5, +10, +15, and +20° and on the transverse axis: -15, -10, -5, 0, +5, +10, and +15°. It was found that the variation of the transverse inclination has little effect on the dosage. When using fertilizer metering with a helicoid, the higher the longitudinal inclination, the greater the dosage in a linear manner, while the meterings with two helicoids provided less oscillation of the dosages according to the inclinations.

https://doi.org/10.1590/1807-1929/agriambi.v25n1p51-57 470 downloads

PERFORMANCE OF HELICAL METERING MECHANISMS IN THE APPLICATION OF MICROGRANULAR FERTILIZER
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Spagnolo, Roger T.

; Rosa, David P. da

; Pinho, Marivan da S.

; Schiavon, Cheiner S.

; Schmechel, Diego K.

Engenharia Agrícola

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aug 2020, Volume 40 N. 4 Pages 481 - 488

Abstract: En | Text: En | PDF: En

ABSTRACT The use of microgranular fertilizers is currently increasing, with low application rates as an obstacle in the mechanization. This study aimed to verify the performance of helical metering mechanisms using microgranular fertilizer. Four different fertilizer-metering mechanisms were tested at two pre-established dose rates (35 and 50 kg ha−1) and seven longitudinal angles (−15°, −10°, −5°, 0°, +5°, +10°, and +15°). The experiment was carried out according to Brazilian standards. The results showed that the longitudinal inclination affects the actual fertilizer dose in all tested metering systems. Metering mechanisms with a helicoid with longitudinal and lateral overflow presented a similar dose, according to the variation of the longitudinal inclination. The metering mechanism with two helicoids showed the highest dose variation, while the metering mechanism with a helical thread and longitudinal overflow, filled between the shaft and the helicoid, had the best performance.

https://doi.org/10.1590/1809-4430-eng.agric.v40n4p481-488/2020 389 downloads

Estimated costs of hospitalization due to coronary artery disease attributable to familial hypercholesterolemia in the Brazilian public health system
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Bahia, Luciana R.

; Rosa, Roger S.

; Santos, Raul D.

; Araujo, Denizar V.

Archives of Endocrinology and Metabolism

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may 2018, Volume 62 N. 3 Pages 303 - 308

Abstract: En | Text: En | PDF: En

ABSTRACT Objective: Cardiovascular diseases are the leading cause of death in Brazil, imposing substantial economic burden on the health care system. Familial hypercholesterolemia (FH) is known to greatly increase the risk of premature coronary artery disease (CAD). This study aimed to estimate the economic impact of hospitalizations due to CAD attributable to FH in the Brazilian Unified Health Care System (SUS). Subjects and methods: Retrospective, cross-sectional study of data obtained from the Hospital Information System of the SUS (SIHSUS). We selected all adults (≥ 20 years of age) hospitalized from 2012-2014 with primary diagnoses related to CAD (ICD-10 I20 to I25). Attributable risk methodology estimated the contribution of FH in the outcomes of interest, using international data for prevalence (0.4% and 0.73%) and relative risk for events (RR = 8.56). Results: Assuming an international prevalence of FH of 0.4% and 0.73%, of the 245,981 CAD admissions/year in Brazil, approximately 7,249 and 12,915, respectively, would be attributable to an underlying diagnosis of FH. The total cost due to CAD per year, considering both sexes and all adults, was R$ 985,919,064, of which R$ 29,053,500 and R$ 51,764,175, respectively, were estimated to be attributable to FH. The average cost per FH-related CAD event was R$ 4,008. Conclusion: Based on estimated costs of hospitalization for CAD, we estimated that 2.9-5.3% are directed to FH patients. FH can require early specific therapies to lower risk in families. It is mandatory to determine the prevalence of FH and institute appropriate treatment to minimize the clinical and economic impact of this disease in Brazil.

https://doi.org/10.20945/2359-3997000000030 1170 downloads

Diversity of Brazilian Fungi
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Maia, Leonor C.

; Carvalho Júnior, Aníbal A. de

; Cavalcanti, Laise de H.

; Gugliotta, Adriana de M.

; Drechsler-Santos, Elisandro R.

; Santiago, André L.M. de A.

; Cáceres, Marcela E. da S.

; Gibertoni, Tatiana B.

; Aptroot, André

; Giachini, Admir J.

; Soares, Adriene M. da S.

; Silva, Allyne C.G.

; Magnago, Altielys C.

; Goto, Bruno T.

; Lira, Carla R.S. de

; Montoya, Carlos A.S.

; Pires-Zottarelli, Carmen L.A.

; Silva, Danielle K.A. da

; Soares, Dartanhã J.

; Rezende, Diogo H.C.

; Luz, Edna D.M.N.

; Gumboski, Emerson L.

; Wartchow, Felipe

; Karstedt, Fernanda

; Freire, Fernando M.

; Coutinho, Flávia P.

; Melo, Georgea S. N. de

; Sotão, Helen M. P.

; Baseia, Iuri G.

; Pereira, Jadergudson

; Oliveira, Jadson J.S. de

; Souza, João F.

; Bezerra, José L.

; Neta, Lídia S. Araujo

; Pfenning, Ludwig H.

; Gusmão, Luís F.P.

; Neves, Maria A.

; Capelari, Marina

; Jaeger, Melissa C.W.

; Pulgarín, Melissa P.

; Menolli Junior, Nelson

; Medeiros, Priscila S. de

; Friedrich, Raquel C.S.

; Chikowski, Renata dos S.

; Pires, Ricardo M.

; Melo, Roger F.

; Silveira, Rosa M.B. da

; Urrea-Valencia, Salomé

; Cortez, Vagner G.

; Silva, Valéria F. da

Rodriguésia

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2015, Volume 66 N. 4 Pages 1033 - 1045

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Até 2010, o conhecimento sobre a diversidade de fungos do Brasil estava registrado em publicações esparsas de taxonomia e ecologia e em algumas poucas listas de espécies. Com a publicação do Catálogo de Plantas e Fungos do Brasil, e a disponibilização da lista online, tem sido possível agregar o conhecimento disperso. A versão ora apresentada acrescenta 2.111 nomes de espécies aos 3.608 listados em 2010. São citadas 5.719 espécies de fungos distribuídas em 1.246 gêneros, 102 ordens e 13 divisões, consistindo em considerável aumento em relação a 2010, quando estavam registrados 924 gêneros e 78 ordens. Predominam os Basidiomycota (2.741 espécies, em 22 ordens) e Ascomycota (1.881 espécies, em 41 ordens). A Mata Atlântica possui a maior quantidade de registros, com 3.017 espécies, seguido pela Amazonia (1.050), Caatinga (999), Cerrado (638) e Pampa e Pantanal com 84 e 35 espécies, respectivamente. A região Nordeste tem a maior riqueza (2.617 especies), seguida pelo Sudeste (2.252), Sul (1.995), Norte (1.301) e Centro Oeste (488 espécies). Em relação aos Estados da Federação, São Paulo (1.846 espécies), Pernambuco (1.611) e Rio Grande do Sul (1.377) são os mais diversos.

Abstract Knowledge about the Brazilian fungal diversity was, until 2010, recorded in few taxonomy and ecology publications, as well as in a handful of species lists. With the publication of the Catálogo de Plantas e Fungos do Brasil and the continued availability of an online list, it has been possible to aggregate this dispersed knowledge. The version presented here adds 2,111 species names to the 3,608 listed in 2010. A total of 5,719 species of fungi distributed in 1,246 genera, 102 orders and 13 phyla represents a considerable increase over the last five years, when only 924 genera and 78 orders were registered. Basidiomycota (2,741 species in 22 orders) and Ascomycota (1,881 species in 41 orders) predominate over other groups. The Atlantic Rainforest has the largest number of records, with 3,017 species, followed by Amazon Rainforest (1,050), Caatinga (999), Cerrado (638) and Pampa and Pantanal with 84 and 35 species, respectively. The Northeast region has the greatest richness (2,617 species), followed by Southeast (2,252), South (1,995), North (1,301) and Central-West (488 species). Regarding the States of the Federation, São Paulo with 1,846 species, Pernambuco with 1,611 and Rio Grande do Sul with 1,377 species are the most diverse.

https://doi.org/10.1590/2175-7860201566407 9322 downloads

Design and FPGA prototyping of a H: 264/AVC main profile decoder for HDTV
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Agostini, Luciano V.

; Azevedo Filho, Arnaldo P.

; Staehler, Wagston T.

; Rosa, Vagner S.

; Zatt, Bruno

; Pinto, Ana Cristina M.

; Porto, Roger Endrigo

; Bampi, Sergio

; Susin, Altamiro A.

Journal of the Brazilian Computer Society

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mar 2007, Volume 12 N. 4 Pages 25 - 36

Abstract: En | Text: En | PDF: En

This paper presents the architecture, design, validation, and hardware prototyping of the main architectural blocks of main profile H.264/AVC decoder, namely the blocks: inverse transforms and quantization, intra prediction, motion compensation and deblocking filter, for a main profile H.264/AVC decoder. These architectures were designed to reach high throughputs and to be easily integrated with the other H.264/AVC modules. The architectures, all fully H.264/AVC compliant, were completely described in VHDL and further validated through simulations and FPGA prototyping. They were prototyped using a Digilent XUP V2P board, containing a Virtex-II Pro XC2VP30 Xilinx FPGA. The post place-and-route synthesis results indicate that the designed architectures are able to process 114 million samples per second and, in the worst case, they are able to process 64 HDTV frames (1080x1920) per second, allowing their use in H.264/AVC decoders targeting real time HDTV applications.

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Estudio de un brote intrahospitalario por Salmonella typhimurium productora de beta-lactamasa de espectro extendido SHV-5
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Del Pozo, Liliana

; Nazario, Silva

; Valencia, Augusto

; Soto, Javier

; Riveros, Juan C

; Sacsaquispe, Rosa

; Calderón, Róger

; Suarez, Víctor

Anales de la Facultad de Medicina

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oct 2006, Volume 67 N. 4 Pages 318 - 326

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Background: An ESBL Salmonella typhimurium outbreak occurred at San Bartolome hospital from February 17 through March 16, 2001. Objectives: To identify the mechanism involved in Salmonella typhimurium spread and genetic characterization of beta-lactamase resistance associated genes. Design: Clinical-bacteriologic retrospective study. Setting: San Bartolomé Mother Child Teaching National Hospital. Biologic materials: Bacterial isolations from lactating patients. Interventions: The genetic diversity was characterized from five bacterial isolates from infants admitted to the pediatric units, using REP-PCR and plasmid fingerprinting. We previously characterized the antimicrobial resistance, determining the presence of ESBL by the double disc diffusion method and the variant was identified by sequencing the gen bla shv . Main outcome measures: Salmonella typhimurium genotypes, plasmids and beta-lactamase presence. Results: We found two different genotypes among the Salmonella typhimurium isolates; the index case (susceptible) showed a different genotype and the other isolates coming from hospitalized children were resistant. One of the S. typhimurium plasmids had a heavier molecular weight than K. pneumoniae’s but as heavy as the hospital acquired E. coli isolates plasmids. We found the ESBL SHV-5 in both S. typhimurium y E. coli isolates. Conclusions: This report suggests that the bacteria spread among infants could be facilitated by many factors playing different roles in the genetic material transfer responsible of the microbial resistance.

Antecedentes: Presencia de un brote intrahospitalario de Salmonella typhimurium productora de beta-lactamasas de espectro extendido ocurrido en el Hospital San Bartolome, entre el 17 de febrero y el 6 de marzo del año 2001. Objetivo: Identificar los mecanismos implicados en la transmisión de Salmonella typhimurium y caracterización de los genes asociados a la resistencia en beta-lactámicos. Diseño: Estudio clínico-bacteriológico retrospectivo. Lugar: Hospital Nacional Docente Madre Niño (Honadomani) San Bartolomé. Materiales biológicos: Aislamientos bacterianos provenientes de pacientes lactantes. Intervenciones: Se determinó la diversidad genética de cinco aislamientos bacterianos provenientes de pacientes lactantes hospitalizados en la Unidad pediátrica del hospital, utilizando REP-PCR y fingerprint plasmídico. Previamente, se caracterizó la resistencia antimicrobiana, determinando la presencia de beta-lactamasa de espectro extendido mediante la prueba de sinergia de doble disco; la variante fue identificada por PCR-secuenciamiento del gen bla shv . Principales medidas de resultados: Presencia de genotipos, plásmidos y beta-lactamasa de Salmonella typhimurium. Resultados: Se determinó la presencia de dos genotipos en los aislamientos de Salmonella typhimurium; el caso índice (sensible) presentó un genotipo diferente al de otros aislamientos resistentes pertenecientes a pacientes hospitalizados. Se determinó la presencia en S. typhimurium de un plásmido de peso molecular elevado de tamaño distinto a los de K. pneumoniae, pero probablemente relacionado con una cepa de E. coli intrahospitalaria. Se encontró la beta-lactamasa de espectro extendido SHV-5 en los aislamientos de S. typhimurium y E. coli. Conclusiones: El estudio sugiere que la diseminación de estas bacterias en los lactantes puede haber sido favorecida por varios factores que habrían intervenido en la transferencia de elementos genéticos responsables de la resistencia antimicrobiana.

Fatores de risco para doenças não-transmissíveis em área metropolitana na região sul do Brasil: prevalência e simultaneidade
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Duncan, Bruce B.

; Schmidt, Maria I.

; Polanczyk, Carísi A.

; Homrich, Clécio S.

; Rosa, Roger S.

; Achutti, Aloyzio C.

Revista de Saúde Pública

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feb 1993, Volume 27 N. 1 Pages 43 - 48

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Três quartos da mortalidade no Estado do Rio Grande do Sul (Brasil) ocorrem por doenças não-transmissíveis. Dentre elas as doenças cardiovasculares, por si só, correspondem a 35% das causas de morte. Para avaliar a prevalência de fatores de risco para essas doenças, foi realizado inquérito domiciliar no período de 1986/87. Foram entrevistados 1.157 indivíduos entre 15-64 anos, residentes em setores censitários de 4 áreas docente-assistenciais do Município de Porto Alegre, RS. A prevalência padronizada de tabagismo foi de 40%, hipertensão 14%, obesidade 18%, sedentarismo geral 47% e consumo excessivo de álcool, 7%. Trinta e nove por cento da amostra acumulavam dois ou mais desses cinco fatores de risco, somente 22% de homens e 21% de mulheres não apresentaram esses fatores de risco. As elevadas freqüências e concomitâncias desses fatores de risco alertam para sua importância em programas que visam a prevenção das doenças não-transmissíveis.

Three-quarters of deaths in Rio Grande do Sul State, Brazil, are due to non-communicable diseases - cardiovascular diseases, alone, being responsible for 35% of them. To evaluate the prevalence of risk factors for these diseases, a household survey of 1,157 randomly sampled individuals between 15 and 64 years of age was undertaken in 1986 and 1987 in census tracts of 4 areas of the city of Porto Alegre. The age-and sex-adjusted prevalence of smoking was 40%, hypertension 14%, obesity 18%, overall sedentary lifestyle 47%, and excessive alcohol consumption 7%. Thirty-nine percent of the sample presented two or more of these five risk factors, and only 22% of men and 21% of women had none of them. The high frequencies and simultaneous presence of these risk factors indicate their importance for programs aimed at the prevention of non-communicable diseases and the promotion of adult health.

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Fatores de risco para doenças não-transmissíveis em área metropolitana na região sul do Brasil: prevalência e simultaneidade
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Duncan, Bruce B.

; Schmidt, Maria I.

; Polanczyk, Carísi A.

; Homrich, Clécio S.

; Rosa, Roger S.

; Achutti, Aloyzio C.

Revista de Saúde Pública

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feb 1993, Volume 27 N. 1 Pages 43 - 48

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

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Alterações cognitivas em trabalhadores de uma empresa de processamento de dados
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Hoefel, Maria da Graça

; Chaves, Marcia L.F.

; Rosa, Roger S.

; Nardi, Henrique C.

; Zago, Marilene

Revista de Saúde Pública

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feb 1992, Volume 26 N. 1 Pages 21 - 26

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Realizou-se estudo de 191 trabalhadores de uma empresa federal de processamento de dados em Porto Alegre, RS, Brasil, em 1989, objetivando estudar déficits cognitivos. São analisadas as relações entre queixas de alteração de memória e os respectivos desempenhos em testes de avaliação cognitiva segundo três grupos de trabalhadores, o primeiro com atividades automatizadas e repetitivas (digitadores) e dois outros com funções diversificadas. Utilizou-se um teste de rastreamento psiquiátrico para controlar esta possível variável de confusão. Existe uma alta prevalência de queixas de perda de memória (65,4%), apesar de não haver evidências significativas de problemas cognitivos. Observou-se uma associação estatisticamente significativa entre a presença ou não de queixas de memória e o desempenho no teste psiquiátrico. Sugere-se que futuros estudos enfatizem o aspecto de saúde mental e sofrimento psíquico para compreensão destas queixas, tendo em vista as características do processo de trabalho na informática.

A study of 191 data processing workers undertaken in Porto Alegre, Brazil, in 1989, is presented. The relationship between complaints of loss of memory and their respective scores on cognitive testing in three groups of workers, one with automatized repetitive activities and two others with diversified activities, is analysed. The scores and complaints are compared with the results of a screening test for psychiatric disorders in order to verify the influence of this confounding factor. No significant evidence of cognitive problems was found despite the high prevalence of complaints of memory loss in this population (65,4%). There is a significant statistical association between these complaints and the scores of the psychiatric testing. It is suggested that futures studies should emphasize psychiatric analysis with a view to clarifying the complaints of Data Processing workers.

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Alterações cognitivas em trabalhadores de uma empresa de processamento de dados
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Hoefel, Maria da Graça

; Chaves, Marcia L.F.

; Rosa, Roger S.

; Nardi, Henrique C.

; Zago, Marilene

Revista de Saúde Pública

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feb 1992, Volume 26 N. 1 Pages 21 - 26

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

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