Modelling and Coordination of Building design:an experience of BIM learning/upskilling

The implementation of Building Information Modelling (BIM) in the Architecture, Engineering, Construction and Operations (AECO) industry requires multidisciplinary teams equipped with new technical and managerial skills. Professionals that are inexperienced or unfamiliar with the BIM design process face difficulties in transposing complex concepts into BIM modelling and coordination practices, despite governments, industry bodies, and academia's efforts. With this issue in mind, this article's objective is to present the teaching-learning strategies and tools adopted in a practical case of modelling an existing building on a BIM platform. In terms of method, a phenomenological approach has been taken to report on an exploratory didactic experience. The Cognitive Load Theory (CLT) was used to assess learning based on the authors’ perceptions. The research has been structured into the following five stages: Literature Review; Analysis of Brazilian and International BIM Standards and Guides; Didactic exercise; Experience Assessment; and Conclusions. The results reveal aspects of BIM processes that can be widely investigated in an academic environment, such as the BIM design and coordination process model, which can be explored as a tool in the BIM teaching-learning process. Also, difficulties related to teaching BIM management processes were identified, thus calling for different didactic approaches. The contributions made by the research come from reporting and analysing the process of learning complex BIM content from the perspective of inexperienced professionals. The work also contributes to the field through the BIM learning assessment proposal and the BIM process model resulted from the authors’ practical experience.</p

Modelling and Coordination of Building design:an experience of BIM learning/upskilling

The implementation of Building Information Modelling (BIM) in the Architecture, Engineering, Construction and Operations (AECO) industry requires multidisciplinary teams equipped with new technical and managerial skills. Professionals that are inexperienced or unfamiliar with the BIM design process face difficulties in transposing complex concepts into BIM modelling and coordination practices, despite governments, industry bodies, and academia's efforts. With this issue in mind, this article's objective is to present the teaching-learning strategies and tools adopted in a practical case of modelling an existing building on a BIM platform. In terms of method, a phenomenological approach has been taken to report on an exploratory didactic experience. The Cognitive Load Theory (CLT) was used to assess learning based on the authors’ perceptions. The research has been structured into the following five stages: Literature Review; Analysis of Brazilian and International BIM Standards and Guides; Didactic exercise; Experience Assessment; and Conclusions. The results reveal aspects of BIM processes that can be widely investigated in an academic environment, such as the BIM design and coordination process model, which can be explored as a tool in the BIM teaching-learning process. Also, difficulties related to teaching BIM management processes were identified, thus calling for different didactic approaches. The contributions made by the research come from reporting and analysing the process of learning complex BIM content from the perspective of inexperienced professionals. The work also contributes to the field through the BIM learning assessment proposal and the BIM process model resulted from the authors’ practical experience.</p

Analise da eficiência energética de usinas fotovoltaicas ao longo de um dia / Analysis of the energy efficiency of photovoltaic plants over a day

Esse estudo tem como objetivo analisar um dia de geração em duas usinas fotovoltaicas: UFV1 e UFV2. Neste trabalho será calculado as perdas de energia do dia 26/05/2020, com condições climáticas normais, sem nuvens. A energia que é gerada pelos painéis solares será comparada com a energia que incide sobre os mesmos, evidenciando as perdas. A partir do cálculo de eficiência de geração, foi possível constatar que alguns painéis possuem quedas de eficiência, que variam de acordo com o horário, ligadas a um problema crônico de posicionamento ou sombreamento intermitente

Interrelationship between potassium rates and the efficiency of Bt genes in the control of Spodoptera frugiperda

O objetivo deste trabalho foi identificar o efeito de doses de potássio sobre a resistência transgênica Bt e os danos causados por Spodoptera frugiperda em plantas de milho, em diferentes estádios de desenvolvimento. O delineamento experimental foi de blocos ao acaso, em arranjo fatorial 3x6, com três doses de potássio (0, 45 e 90 kg ha-1) e seis híbridos de milho (20A55Hx, 30A77PW, AG1051, MG652PW, NS90VTPro2 e NS92VTPro), com três repetições. Os híbridos foram avaliados por meio de análise de variáveis canônicas. Com doses baixas de potássio, a eficácia dos híbridos de milho no controle da lagarta S. frugiperda diminui nos diferentes estádios fenológicos. O uso da tecnologia Bt é mais eficiente quando sob dosagem adequada de potássio de 90 kg ha-1 KCl.The objective of this work was to identify the effect of potassium rates on Bt transgenic resistance and damage caused by Spodoptera frugiperda in corn plants at different developmental stages. The experimental design was a randomized complete block in a 3x6 factorial arrangement, with three potassium rates (0, 45, and 90 kg ha-1) and six corn hybrids (20A55Hx, 30A77PW, AG1051, MG652PW, NS90VTPro2, and NS92VTPro), with three replicates. The hybrids were evaluated through the analysis of canonical variables. With low potassium rates, the effectiveness of the corn hybrids in controlling the S. frugiperda caterpillar decreases in the different phenological stages. The use of the Bt technology is more efficient under an adequate potassium rate of 90 kg ha-1 KCl

Atributos físicos e microbiológicos de um latossolo vermelho-amarelo distrófico típico sob cerrado nativo e monocultivo de soja.

O uso conservacionista do solo tem-se instituído tema de crescentes discussões devido à remoção de biomas e seu posterior uso agrícola. Hipoteticamente, acredita-se que a avaliação da qualidade agronômica de um solo qualquer, por meio de indicadores conjugados, em vez de interpretações isoladas, é mais adequada para caracterização do efeito antrópico em sistemas agrícolas. Em função disso, objetivou-se diagnosticar alterações em um LATOSSOLO VERMELHO-AMARELO Distrófico típico sob monocultivo de soja e cerrado nativo com base em indicadores físicos e microbiológicos, amostrados de modo inteiramente casualizados na profundidade de 0 a 10 cm. Foi possível identificar degradações físico-microbiológicas significativas no ambiente antropizado, com reduções médias nos indicadores de 47,87%; 15,76%; 24,74%; 39,90% e 15,36% para umidade gravimétrica, porosidade total, carbono microbiano, respiração basal e quociente microbiano; e aumentos para a densidade do solo, resistência mecânica do solo à penetração, microporosidade, quociente metabólico de 19,47%; 128,71%; 56,55% e 163,44%, respectivamente. Conjugando esses resultados isolados por meio do método do Qualigrama obteve-se um índice quantitativo da qualidade edáfica no monocultivo de soja igual a 0,26, que qualitativamente corresponde ao estado de “nível crítico” em comparação ao ambiente nativo

Development of an indirect ELISA for serological diagnosis of bovine herpesvirus 5

Bovine herpesviruses 1 and 5 (BoHV-1 and BoHV-5) are economically important pathogens, associated with a variety of clinical syndromes, including respiratory and genital disease, reproductive failure and meningoencephalitis. The standard serological assay to diagnose BoHV-1 and BoHV-5 infections is the virus neutralization test (VNT), a time consuming procedure that requires manipulation of infectious virus. In the present study a highly sensitive and specific single dilution indirect ELISA was developed using recombinant glycoprotein D from BoHV-5 as antigen (rgD5ELISA). Bovine serum samples (n = 450) were screened by VNT against BoHV-5a and by rgD5ELISA. Compared with the VNT, the rgD5ELISA demonstrated accuracy of 99.8%, with 100% sensitivity, 96.7% specificity and coefficient of agreement between the tests of 0.954. The rgD5ELISA described here shows excellent agreement with the VNT and is shown to be a simple, convenient, specific and highly sensitive virus-free assay for detection of serum antibodies to BoHV-5

Atividade microbiológica do solo sob diferentes coberturas vegetais no Cerrado tocantinense

The microbial activity is very sensitive to changes in soil cover, making it an important indicator of soil quality. The study aimed to assess changes in soil microbiological activities under different vegetation coverings in the Cerrado biome of Tocantins state. The work was developed in areas of Eucalyptus sp., Pasture, agriculture and Cerrado sensu stricto in the experimental farm of the Federal University of Tocantins. The soil samples were collected in trenches of 70 x 70 cm at depths 0-10 and 10-20 cm, with six replications. The variables evaluated were: concentration and stock in the microbial biomass carbon, basal soil respiration, metabolic quotient and microbial quotient. The statistical analysis was performed using the normality test, analysis of variance and comparison of means by the Tukey test at 5% significance. The area with Eucalyptus sp. at 11 years of age, he had a stable soil microbiological activity, showing stocks in microbial biomass carbon 57.32% higher than that native forest vegetation, 84.29% that pasture and 290.91% that agriculture. The soil microbiological activities are affected by the variation of the soil vegetation cover, being efficient as an indicator of soil quality.A atividade microbiana se mostra bastante sensível a mudanças da cobertura, tornando-se um importante indicador de qualidade do solo. O estudo teve como objetivo avaliar as alterações nas atividades microbiológicas do solo sob as diferentes coberturas vegetais no cerrado do Tocantins. O trabalho foi desenvolvido em áreas de Eucalyptus sp., pastagem, agricultura e cerrado sensu stricto na fazenda experimental da Universidade Federal do Tocantins. As amostras de solo foram coletadas em trincheiras de 70 x 70 cm nas profundidades 0-10 e 10-20 cm, com seis repetições. As variáveis avaliadas foram: concentração e estoque de carbono na biomassa microbiana, respiração basal do solo, quociente metabólico e quociente microbiano. A análise estatística foi realizada por meio do teste de normalidade, análise de variância e comparação das médias pelo teste Tukey a 5% de significância. A área com Eucalyptus sp. com 11 anos apresentou uma atividade microbiológica do solo estável, apresentando estoques de carbono na biomassa microbiana superiores em 57,32 % aos da vegetação de mata nativa, 84,29 % ao da pastagem e 290,91 % ao da agricultura. As atividades microbiológicas do solo são afetadas pela variação da cobertura vegetal do solo, sendo eficiente como indicador de qualidade do solo

Evaluation of eleven immunochromatographic assays for SARS-CoV-2 detection: investigating the dengue cross-reaction

COVID-19 disease is spread worldwide and diagnostic techniques have been studied in order to contain the pandemic. Immunochromatographic (IC) assays are feasible and a low-cost alternative especially in low and middle-income countries, which lack structure to perform certain diagnostic techniques. Here we evaluate the sensitivity and specificity of eleven different IC tests in 145 serum samples from confirmed cases of COVID-19 using RT-PCR and 100 negative serum samples from blood donors collected in February 2019. We also evaluated the cross-reactivity with dengue using 20 serum samples from patients with confirmed diagnosis for dengue collected in early 2019 through four different tests. We found high sensitivity (92%), specificity (100%) and an almost perfect agreement (Kappa 0.92) of IC assay, especially when we evaluated IgG and IgM combined after 10 days from the onset of symptoms with RT-PCR. However, we detected cross-reactivity between dengue and COVID-19 mainly with IgM antibodies (5 to 20% of cross-reaction) and demonstrated the need for better studies about diagnostic techniques for these diseases