Uso de Regressão Logística para Modelar e Avaliar a Credibilidade em Aplicações Web

A popularização das aplicações Web tem feito surgir novos serviços acada dia, demandado mecanismos que assegurem a credibilidade desses servi-ços. Neste trabalho utilizamos regressão logística para modelar e avaliar a cre-dibilidade de um serviço da Web, considerando diferentes critérios associadosao serviço e seus fornecedores. A fim de validar nossa metodologia, executamosexperimentos usando uma base de dados real, a partir da qual avaliamos essesmodelos de credibilidade. Os resultados obtidos são muito bons, apresentandoganhos representativos, quando comparados à linha-de-base, mostrando assimque a metodologia proposta é promissora e pode ser usada para fortalecer aconfiança dos usuários nos serviços providos na Web

ANÁLISE DO PERFIL METODOLÓGICO DAS DISSERTAÇÕES DE MESTRADO PROFISSIONAL EM ADMINISTRAÇÃO UNIVERSITÁRIA DA UNIVERSIDADE FEDERAL DE SANTA CATARINA APRESENTADAS NO PERÍODO DE 2012 A 2015

Este artigo teve por objetivo mapear o perfil metodológico das 89 dissertações apresentadas ao Programa de Pós-Graduação em Administração Universitária (PPGAU) da Universidade Federal de Santa Catarina (UFSC), no período de 2012 a 2015. Trata-se de uma pesquisa pura, descritiva e bibliográfica, com abordagem quantitativa que, a partir de levantamento bibliográfico, apresentou um breve histórico da criação e reconhecimento do PPGAU e sua importância para a área de administração universitária, bem como apresentou aspectos de métodos e técnicas de pesquisa. Por meio de análise bibliométrica e tendo por base as referências bibliográficas sobre metodologia, o artigo evidenciou detalhadamente os procedimentos metodológicos utilizados na elaboração de dissertações na área de administração universitária. Na análise das dissertações, em conformidade com o referencial teórico apresentado, utilizaram-se os dados relativos e absolutos, por intermédio de tabelas e gráficos

Volunteer soybean (Glycine max) interference in bean (Phaseolus vulgaris) crops: ethoxysulfuron and halosulfuron critical level of damage and selectivity

This study aimed to determine the negative impact of volunteer soybean plants on bean crop yield and the tolerance of bean genotypes to the herbicides ethoxysulfuron and halosulfuron. To determine the impact of volunteer soybean plants on bean crops, a field experiment was developed, with sub-sub-plots, and four replications. The main plots contained two bean cultivars, while the sub-plots received two soybean sowing times (0 and 7 days after the beans had been sown), while the sub-sub plots contained five soybean plant densities (0, 5, 10, 20, and 40 plants m-2). The tolerance of the bean genotypes was evaluated with two experiments in a completely randomized design with three replications. They were arranged in a 28 x 3 factorial design (bean genotypes x herbicide doses). Each soybean plant per m2 reduced bean crop yield by 4%. The recommended doses of ethoxysulfuorn and halosulfuorn resulted in tolerance levels above 70% for all the studied bean genotypes. Highlights: The herbicides ethoxysulfuron and halosulfuron, are registered in Brazil for the control of volunteer soybean plants in bean crops. To date, the impact generated by volunteer soybean plants competing with bean plants is unknown. The tolerance of 28 bean cultivars to herbicides ethoxysulfuron and halosulfuron was determined using dose label and double the dose. The impact of volunteer soybean plants on bean crops was determined using two bean cultivars and two soybean sowing times. The bean genotypes displayed a highly variable response to the herbicides ethoxysulfuron and halosulfuron; however, when the label recommended dose of the herbicides was used, the tolerance levels observed were over 70%. Each soybean plant is capable of causing a 4% reduction in bean plant grain yield, regardless of the establishment time of the soybean plants or the bean genotype.This study aimed to determine the negative impact of volunteer soybean plants on bean crop yield and the tolerance of bean genotypes to the herbicides ethoxysulfuron and halosulfuron. To determine the impact of volunteer soybean plants on bean crops, a field experiment was developed, with sub-sub-plots, and four replications. The main plots contained two bean cultivars, while the sub-plots received two soybean sowing times (0 and 7 days after the beans had been sown), while the sub-sub plots contained five soybean plant densities (0, 5, 10, 20, and 40 plants m-2). The tolerance of the bean genotypes was evaluated with two experiments in a completely randomized design with three replications. They were arranged in a 28 x 3 factorial design (bean genotypes x herbicide doses). Each soybean plant per m2 reduced bean crop yield by 4%. The recommended doses of ethoxysulfuorn and halosulfuorn resulted in tolerance levels above 70% for all the studied bean genotypes. Highlights: The herbicides ethoxysulfuron and halosulfuron, are registered in Brazil for the control of volunteer soybean plants in bean crops. To date, the impact generated by volunteer soybean plants competing with bean plants is unknown. The tolerance of 28 bean cultivars to herbicides ethoxysulfuron and halosulfuron was determined using dose label and double the dose. The impact of volunteer soybean plants on bean crops was determined using two bean cultivars and two soybean sowing times. The bean genotypes displayed a highly variable response to the herbicides ethoxysulfuron and halosulfuron; however, when the label recommended dose of the herbicides was used, the tolerance levels observed were over 70%. Each soybean plant is capable of causing a 4% reduction in bean plant grain yield, regardless of the establishment time of the soybean plants or the bean genotype

Iodine availability through iodized salt in Portugal: 2010-2021 sales evolution and distribution

Salt iodization programs are considered the most cost-effective measures to ensure adequate iodine intake in iodine-deficient populations. Portuguese women of childbearing age and pregnant women were reported to be iodine-deficient, which led the health authorities, in 2013, to issue a recommendation for iodine supplementation during preconception, pregnancy and lactation. In the same year, iodized salt became mandatory in school canteens. Of note, no regulation or specific programs targeting the general population, or the impact of iodized salt availability in retailers, are known. The present study analyzed iodized salt supermarket sales from 2010 to 2021 from a major retailer, identifying the proportion of iodized salt in total salt sales and its distribution in mainland Portugal. Data on iodine content were collected through the nutritional label information. Of a total of 33 salt products identified, 3 were iodized (9%). From 2010 to 2021, the weighted sales of iodized salt presented a growing tendency, reaching the maximum of 10.9% of total sales (coarse plus fine salt) in 2021. Iodized salt reached a maximum of 11.6% of total coarse salt in 2021, a maximum of 2.4% of the total fine salt in 2018. The overall sales of iodized salt and their contribution to iodine intake are extremely low, prompting additional studies to understand the consumer’s choice and awareness of the benefits of iodized salt.This work has been funded by national funds, through the Foundation for Science and Technology (FCT)—projects UIDB/50026/2020 and UIDP/50026/2020. The work of Sarai Isabel Machado was supported by FCT—doctoral fellowship 2022.12249.BD

A influência do tempo após o tratamento de sementes de soja sobre a sua geminação em Mineiros – Goiás / The influence of time after the treatment of soybean seeds on its twining in Mineiros – Goiás

A produção de soja tem aumentado a cada ano que se passa e ocupa um papel de destaque na economia brasileira. Porém, os produtores de soja possuem vários desafios para produzir de forma eficiente. Dentre estes desafios pode se destacar a questão do tratamento de semente que visa controlar pragas e patógenos que podem prejudicar a germinação e desenvolvimento da cultura no campo. Neste contexto, este trabalho teve por objetivo avaliar diferentes tempos após o tratamento de sementes de soja realizado com os produtos Power Seed New, Cruiser 350 FS e Apron RFC na dosagem de 100 ml de cada produto para cada 100 Kg de semente. Os tratamentos realizados consistiram na variação do tempo de plantio das sementes após receberem o tratamento com os produtos fitossanitários listados acima em 12, 24; 48, 72 horas e a testemunha que consistiu no plantio das sementes sem o tratamento com os produtos. Em cada tratamento avaliou se a altura de plantas, diâmetro de caule e comprimento de raízes após 15 dias do plantio. Com as variáveis avaliadas foi obtido a média, o erro padrão de cada uma e foram submetidas a Analise de Variância e posteriormente comparadas pelo teste Tukey a 5% pelo software SISVAR. Os dados obtidos revelaram que não existem efeitos negativos no desenvolvimento da cultura à medida que ocorre o aumento do tempo entre o tratamento de sementes e a realização do plantio das sementes tratadas. Dessa forma, esse trabalho permite desmitificar que à medida que o tempo passa após o tratamento de sementes o produtor perde a qualidade das suas sementes.