Ensino de geometria utilizando as paisagens de santarém

Novos métodos são empregados para dar significado ao aluno dos conteúdos apresentados em sala de aula. Segundo (Floriani, 2000) o professor, ao se afastar da visão utilitária da Matemática, afasta-se de seus alunos, portadores dos fatos; o aluno ao se afastar da visão especulativa da Matemática, afasta-se do professor, representante da teoria sistematizada. Logo, há um afastamento entre teoria e fatos. Propomos uma maneira de integrar o saber e o fazer, motivando o aluno a buscar uma nova visão dos conteúdos, trazendo-o da abstração da sala de aula, para a realidade em que vive. Nesse contexto, primeiramente trabalhamos os assuntos de maneira usual, teórica, em que são mostrados aos alunos os pré-requisitos para o desenvolvimento da disciplina. Num segundo momento aplicam-se os conceitos vistos em sala de aula, de maneira prática, sem a presença constante do professor e utilizando as paisagens de Santarém como referência para desenvolvimento da teoria aprendida. Assim o aluno tem suas próprias conclusões a cerca do tema desenvolvido. Ficou claro que quando o aluno realiza o experimento ele percebe a matemática, a geometria envolvida, há um aprendizado efetivo e é mais significativo do que a maneira tradicional que vem sendo utilizada nas escolas

People detection in nuclear plants by video processing for safety purpose

This work describes the development of a surveillance system for safety purposes in nuclear plants. The final objective is to track people online in videos, in order to estimate the dose received by personnel, during the execution of working tasks in nuclear plants. The estimation will be based on their tracked positions and on dose rate mapping in a real nuclear plant at Instituto de Engenharia Nuclear, Argonauta nuclear research reactor. Cameras have been installed within Argonauta’s room, supplying the data needed. Both video processing and statistical signal processing techniques may be used for detection, segmentation and tracking people in video. This first paper reports people segmentation in video using background subtraction, by two different approaches, namely frame differences, and blind signal separation based on the independent component analysis method. Results are commented, along with perspectives for further work

Yield losses in off-season corn crop due to stalk rot disease

O objetivo deste trabalho foi avaliar as perdas causadas pelas podridões da base do colmo em híbridos de milho (Zea mays), bem como identificar os principais patógenos causadores da doença, durante a safrinha, no Estado do Tocantins, Brasil. Foram realizados dois ensaios, um com cinco híbridos, em 2015, e outro com quatro, em 2016. Espigas de plantas sadias e doentes foram colhidas em cada parcela, por ocasião da colheita. Foram medidos tamanho de espigas, peso de grãos e espigas, e umidade dos grãos. De cada planta doente, foi retirado um fragmento do colmo com dois a três entrenós, utilizado para identificação e quantificação dos patógenos. Os patógenos mais comuns foram: Fusarium graminearum, Stenocarpella maydis e Macrophomina phaseolina. Todas as variáveis de produtividade foram significativamente menores nas plantas doentes, com perdas médias de 30,6%, em 2015, e de 34,3% em 2016. As maiores perdas são observadas em híbridos com maior relação entre pesos de grãos e espigas.The objective of this work was to assess yield losses due to stalk rot in corn (Zea mays) hybrids, as well as to identify the main pathogenic fungi responsible for the disease during the off-season, in the state of Tocantins, Brazil. Two field experiments were carried out, one with five hybrids, in 2015, and another with four, in 2016. Ears of healthy and stalk rot-infected plants were collected from each plot, at harvest. Ear size, grain and ear weights, and grain moisture content were measured. From each diseased plant, a stalk piece with two to three nodes was removed for pathogen identification and quantification. The most common pathogens were: Fusarium graminearum, Stenocarpella maydis, and Macrophomina phaseolina. All yield parameters were significantly lower in stalk rot-infected plants, with average losses of 30.6%, in 2015, and of 34.3% in 2016. The highest yield losses are observed in hybrids with the highest grain/ear weight ratio

Frequency of low adherence and related factors in older adults treated in Ponto dos Volantes, in the Jequitinhonha Valley

OBJECTIVE: To evaluate adherence to medication treatment and possible associated factors in elderly patients interviewed during medical appointments in primary care units. METHOD: This was a cross-sectional, population-based study of 57 older patients aged 60 to 99 years living in the municipality of Ponto dos Volantes, state of Minas Gerais, including rural and urban areas. Data were collected during medical appointments, using a structured electronic script. The association between the parameters and the level of adherence to treatment was assessed using the \u3c72 test, with a 95% confidence interval. RESULTS: Among the elderly patients interviewed, 45 (78.9%) responded about adherence to treatment. Of these, 11 (24.4%) were included in the low adherence group. None “ of the parameters evaluated showed a statistically significant association with the classification of drug adherence. CONCLUSION: The present study identified that 1 in every 4 patients had low adherence to drug treatment. Among the variables studied, notably sex, age, schooling, number of comorbidities, number of medications, and income, no statistically significant relationship was observed.</p