Comparação de Métodos de Estimação em um Modelo Linear Simples com Erro nas Variáveis

Although the researcher is very careful errors experiment may bepresent, therefore, is appropriate to evaluate the reliability of data, mainlywhen different estimation methods are used. Considering this problem,the objective of this work is compare the performance of two methods ofestimation known as “Plug-in” and “Attenuation bias”. These methodsare used in the regression model with errors-in-variables techniques. TheMonte-Carlo simulations are used for generated a linear regression modelerrors-in-variables, different sample sizes, residuals distributions and lackof fit were considered. It was possible to conclude that, “Plug-in “ and “Attenuation bias” methods were accurate with R2=90%, however, thesemethods have better accuracy for symmetrical distributions.Por mais cauteloso que seja o pesquisador, os erros nas variáveis poderão estar presentes em um experimento, portanto, é coerente avaliar a confiabilidade das medidas, principalmente no que tange ao uso de diferentes métodos de estimação. Decorrente a este fato, este trabalho objetivou comparar o desempenho de dois métodos de estimação, denominados por Plug-in e atenuador de vício, utilizados para estimar parâmetros de um modelo de regressão com erro nas variáveis. Para isso, foi utilizada a técnica de simulação Monte-Carlo, da qual, foi gerado um modelo de regressão linear simples com erro nas variáveis, submetido a diferentes situações, representadas pelos tamanhos amostrais, distribuição dos resíduos e valores referentes a qualidade de ajuste. Concluiu-se que, em alta qualidade de ajuste (R2=90%) os métodos “Plug-in” e atenuador de vício foram precisos, porém acurados apenas para os modelos com distribuição simétrica

Three-dimensional misfit between Ti-Base abutments and implants evaluated by replica technique

An important factor affecting the biomechanical behavior of implant-supported reconstructions is the implant-abutment misfit. Objective: This study evaluated the misfit between Ti-Base abutments and implants by means of polyvinyl siloxane replica technique using microcomputed tomography (μCT). Methodology: Volumetric and linear (central and marginal) gaps of four Ti-base abutments (n=10/group): (i) Odontofix LTDA (OD), (ii) Singular Implants (SING), (iii) EFF Dental Components (EFF), and (iv) Control Group (S.I.N implants) compatible with an implant system (Strong SW, S.I.N Implants) were measured using μCT reconstructed polyvinyl siloxane replicas. Results: The results showed significantly lower volume gap for Control S.I.N (0.67±0.29 mm3) and SING (0.69±0.28 mm3) Ti-base abutments relative to OD (1.42±0.28 mm3) and EFF groups (1.04±0.28 mm3) (p<0.033), without significant difference between them (p=0.936). While gap values were homogenous in the central region, EFF presented a significantly higher marginal gap. Accordingly, the Control S.I.N and Singular Ti-base abutments showed improved volumetric and marginal fit relative to Odontofix and EFF. Conclusion: The method of manufacturing abutments influenced the misfit at the implant-abutment interface

Selection among and within half-sib families in "Dentado Composto" maize variety for resistance to S. frugiperda and H. zea. ll cycle.

Estudou-se a obtenção de parâmetros genéticos para alguns caracteres de planta e espiga de milho (Zea mays L.) cv. Composto Dentado. O material é do segundo ciclo de seleção entre e dentro de famílias de meios-irmãos. Avaliaram-se 400 progénies num delineamento de látice simples 10 x 10 com uma repetição por local: Caruaru e S. Bento do Una, PE. Os experimentos não receberam tratamentos fitossanitários, e foram isolados das áreas que receberam tratamentos com inseticidas, utilizando-se infestações naturais. Foram coletados os dados para: altura da planta (AP) e da espiga (AE), número de espigas por planta (NE) e de espigas mal empalhadas (NEME), danos causados por H. zea (HZ) e S. frugiperda (SF), e produção de grãos (PG). As estimativas de variância genética aditiva foram altas (P < 0,05) para AP, AE e PG, e baixas para os demais caracteres. Tendo em vista os baixos valores encontrados para a variabilidade genética concernentes aos caracteres HZ e SF, é necessário um controle ambiental mais eficiente nas avaliações das progénies.The obtention of genetic parameters was studied for some characters of plant and ear of maize (Zea mays L.) cv. Composto Dentado. The material came from the second cicle of selection inter and intra families of half-sibs. Four hundred progenies were evaluated in a 10 x 10 simple lattice design, with one replicate for each place: Caruaru and São Bento do Una, PE, Brazil. The experiments did not receive phytosanitary treatments. They were isolated from the areas that received insecticide applications and lhe natural infestation was used. Data were colected for: plant height (PH), ear height (EH), number of ears per plant (NE), number of ear with loosed husk (NELH), S.frugiperda damage (SFD), H. Zea damage (HZD) and grain yield (GY). The variance analysis showed significance (P < 0.01) for all characters studied except for SFD. The estimate values for the additive genetic variance were high for PH, EH and GY and low for Lhe other characters. Considering the low values found for genetic variability concerning the characters HZ and SF, an environmental control more efficient ia the progenie evaluations is needed

Desenvolvimento descentralizado por meio de End-User Development : avaliação tecnológica : relatório de pesquisa

Pesquisa realizada com financiamento do Ministério da Ciência, Tecnologia, Inovações e Comunicações, Projeto de Cooperação “Aprimoramento do Framework de Soluções de Tecnologia da Informação”. Ministério da Ciência, Tecnologia, Inovações e Comunicaçõe

End-User Development (EUD) : desenvolvimento pelo usuário final: conceitos, estratégias e casos de adoção : relatório de pesquisa

Pesquisa realizada com financiamento do Ministério da Ciência, Tecnologia, Inovações e Comunicações, Projeto de Cooperação “Aprimoramento do Framework de Soluções de Tecnologia da Informação”.Ministério da Ciência, Tecnologia, Inovações e Comunicaçõe

Health care on the radio: debate about sexuality and gender relations with school students / Cuidados de saúde na rádio: debate sobre sexualidade e relações de gênero com alunos escolares

This study aims at analyzing the speeches of young people about sexualities and gender relations while they participated in a radio program. It is a descriptive and exploratory study, with a qualitative approach. The participants were 49 young students from public schools, in the State of Ceará, in Brazil, who participated in the “Program in Tuning with Health through Web Radio AJIR”. Data analysis was carried out from this material and from the analysis of the speeches referenced by Michel Foucault. The study is in accordance with research ethics standards. The prior knowledge that the young students have about the topics discussed was formed within the society in which they live, in their families, in religious meetings, or in the school. Young people see Web Radio as a way to clarify doubts that often go unnoticed in their daily lives and in their family life. It is possible to reflect upon the importance of the methodology used by Web Radio to address issues such as Gender Relations and Sexualities. These results are expected to contribute to the promotion of young people's health through communication closer to the needs and reality of students.

PRÁTICAS DE GESTÃO AMBIENTAL EM UMA ORGANIZAÇÃO DE PRODUTORES DE SUÍNOS EM VERA MT

A suinicultura é uma atividade econômica relevante para a balança comercial agropecuária brasileira. Entretanto, estudos comprovam o grande número de resíduos perigosos descartados por este rebanho meio ambiente. Para tal, esta pesquisa tem por objetivo identificar as ações de gestão socioambiental implementadas pelos gestores de uma Organização Suinicultora do município de Vera em MT. Foi utilizado para esta pesquisa o método qualitativo-descritivo, com realização de entrevista e análise por meio da técnica de estudo de caso. Com base na pesquisa evidenciou-se que a organização trabalha no intuito de evitar a repetição do caminho histórico da industrialização, incorporando em seu processo produtivo o desenvolvimento de tecnologias eficientes de produção e consumo sustentável

Food insecurity in families with children under five years of age on the Brazil-Peru Amazon border

Food and nutrition security is the regular and permanent access to quality food in sufficient quantity. The aim of this study was to estimate the prevalence and factors associated with food insecurity in households with children under five in the Amazon frontier Brazil - Peru. The study was conducted in 352 households in Assis Brasil (Brazil) and 89 households Iñapari (Peru), finding a prevalence of food insecurity of 40.6 % and 38.2 % , respectively ( p = 0.856 ) . In Assis Brasil, having domicile with wood floors or land increased by 2.47 times the odds of food insecurity compared to cement fl oors, ceramic or quarry tiles . Belonging to the poorest tertile increased the chance of food insecurity in 6.04 times ( p &lt; 0.001 ), and the increment of each new resident increased by 37 % the chance of food insecurity in the household . In Iñapari, only living in house made of wood or with a wood floor was associated with food insecurity, showing that income is still the main factor associated with food insecurity in the Amazonian borders

Seroprevalence and Seroconversion of Dengue and Implications for Clinical Diagnosis in Amazonian Children

This study aimed to evaluate the prevalence of serum IgG dengue in children in an Amazonian population, to assess the seroconversion rate in 12 months, and to estimate how many seropositive children had a prior clinical diagnosis of dengue. We conducted a population-based study between 2010 and 2011, with children aged 6 months to 12 years that were living in the urban area of a small town in the Brazilian Amazon. The prevalence of IgG antibodies against dengue antigens was determined by indirect ELISA technique, and seronegative children were reexamined after 12 months to determine seroconversion rates. Results showed seroprevalence of IgG antibodies against dengue type of 2.9%, with no significant association between age, race, and sex. In seropositive children, only 8.4% had received a clinical diagnosis of dengue, and the ratio of clinically diagnosed cases and subclinical cases was 1 : 11. The seroconversion rate between 2010 and 2011 was 1.4% (CI 3.8% to 35.1%). The seroprevalence of dengue in this pediatric population was low, and the vast majority of cases were not clinically detected, suggesting a difficulty in making the clinical diagnosis in children and a high frequency of asymptomatic infections