Tecnologias digitais e o desenvolvimento do conteúdo de cinética química : uma sequência de atividades

Orientador: Prof. Dr. Everton BedinDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Química em Rede Nacional - PROFQUI. Defesa : Curitiba, 13/05/2022Inclui referênciasResumo: Vive-se em uma época em que as Tecnologias Digitais da Informação e Comunicação (TDIC) evoluem rapidamente e continuamente e, por isso, estão sendo cada vez mais vistas como ferramentas indispensáveis para o ensino e a aprendizagem em todas as áreas do conhecimento. Neste sentido, este trabalho objetivou analisar as potencialidades de uma sequência de atividades no ensino de Cinética Química para o desenvolvimento dos Conteúdos Atitudinais, Procedimentais e Conceituais, considerando a utilização e a apropriação de diversas TDIC, dentre elas a utilização das plataformas: Whatsapp, Quizizz, Lucidchart, PhET e vídeos introdutórios. Neste trabalho, foram desenvolvidos pelo professor pesquisador dois aplicativos para smartphones Android através do software App Android II, onde os alunos podem interagir com vídeos curtos contendo pequenos experimentos e visualizar conceitos, gráficos e imagens que contribuem para auxiliar no processo de aprendizagem. Os conteúdos conceituais, procedimentais e atitudinais foram utilizados como embasamento teórico para a aplicação das atividades da pesquisa, que foi realizada em uma turma do 3º ano do curso de formação de docentes integrado ao ensino médio do Colégio Estadual Deputado Arnaldo Faivro Busato no município de Pinhais – PR. A pesquisa foi de caráter qualitativo indutivo e os métodos utilizados para a construção de dados foram: diário de bordo, observações e questionários pré e pós aplicação do produto educacional. Interpretando os dados presentes nos questionários e nas observações de sala de aula, pode-se aferir que as atividades desenvolvidas com as TDIC trouxeram maior interesse aos alunos, possibilitaram aulas mais dinâmicas e interativas, auxiliaram na contextualização do conteúdo de cinética química, criaram momentos de colaboratividade entre os sujeitos e, além de contribuírem significativamente para a aprendizagem dos mesmos, possibilitou a relação e o desenvolvimento dos conteúdos conceituais, procedimentais e atitudinais no ensino de cinética química.Abstract: We live in a time when Digital Information and Communication Technologies (DICT) evolve rapidly and continuously, and therefore are increasingly seen as indispensable tools for teaching and learning in all areas of knowledge. In this sense, this work aimed to analyze the potential of a sequence of activities in the teaching of chemical kinetics for the development of attitudinal, procedural and conceptual contents, considering the use of several DICTs, among them the use of platforms: WhatsApp, Quizizz, Lucidchart, PhET and introductory videos. In this work, two applications for Android smartphones were developed by the researcher teacher through the App Android II software, where students can interact with short videos containing small experiments and visualize concepts, graphics and images that contribute to assisting in the learning process. The conceptual, procedural and attitudinal contents were used as a theoretical basis for the application of the research activities, which was carried out in a class of the 3rd year of the teacher training course integrated to the high school of the Colégio Estadual Deputado Arnaldo Faivro Busato in the municipality of Pinhais – PR. The research was qualitative inductive and the methods used for the construction of data were: logbook, observations and questionnaires before and after application of the educational product. Interpreting the data present in the questionnaires and in the classroom observations, it can be seen that the activities developed with the DICT brought greater interest to the students, made possible more dynamic and interactive classes, helped in the contextualization of the chemical kinetics content, created moments of collaboration between the subjects and, in addition to contributing significantly to their learning, it enabled the relationship and development of conceptual, procedural and attitudinal contents in the teaching of chemical kinetics

An improved k-ε turbulence model for FENE-P fluids capable to reach high drag reduction regime

An improved k-ε turbulence model for viscoelastic fluids is developed to predict turbulent flows in complex geometries, with polymeric solutions described by the finitely extensible nonlinear elastic-Peterlin constitutive model. The k-ε model is tested against a wide range of direct numerical simulation data, with different rheological parameters combinations, and is capable to capture the drag reduction for all regimes of low, intermediate and high, with good performance. Two main contributions are proposed, one through the viscoelastic closures present in the turbulent kinetic energy and dissipation equations, and the other, by modifying eddy viscosity model damping function to incorporate the viscoelastic effect close to the wall, especially at the buffer layer. In addition, improvements have been made to the cross-correlations between the fluctuating components of the polymer conformation and rate of strain tensors present in the Reynolds-averaged transport equation for the conformation tensor. The main advantage is the capacity to predict all components of the tensor with good performance.indisponível

Tecnologias Digitais na Educação Básica

No âmbito deste estudo, derivado de uma dissertação, é abordada a significância da integração das Tecnologias Digitais de Informação e Comunicação (TDIC) no contexto do ensino de química, salientando-se que tais recursos tecnológicos conferem maior atratividade e dinamismo às atividades de ensino. O objetivo da pesquisa se concentra na análise das concepções e percepções discentes no que concerne à incorporação das TDIC nas aulas de química. Este estudo, de natureza básica e abordagem qualitativa, foi conduzido junto a 20 discentes do curso de formação de docentes de uma instituição de ensino pública, no Estado do Paraná. A construção de dados deu-se mediante a utilização de um questionário semiestruturado, cujas respostas foram submetidas a uma análise descritiva-analítica. Os resultados revelaram a aspiração dos alunos por uma abordagem pedagógica pautada na utilização de recursos tecnológicos nas aulas de química, uma vez que tais recursos são pouco explorados durante o ensino. Especificamente, 75% dos participantes indicaram preferência pela "Explicação no quadro e exercícios" como os recursos que consideram pertinente para otimizar a aprendizagem em sala de aula. Tal preferência, embora compreensível devido à prevalência desses métodos tradicionais nas aulas de química, evidencia a necessidade de transformação desse cenário. Apesar da escassa exposição dos alunos às TDIC no contexto escolar, é perceptível o anseio por uma abordagem didática mais dinâmica, que integre jogos tecnológicos, aplicativos e software

Boosting cultural heritage in rural communities through an ICT platform: the Viv@vó project

Rural regions concentrate on themselves a very rich set of ancestral traditions. The perpetuation of such traditions has been achieved through transmission between generations. Unfortunately, all this knowledge is typically elders-centered and it lacks effective processes of digitalization, storage and providing-systems for that all this heritage can effectively be perpetuated through future generations that are digital-born. From this base, it was created a project case study limited to the Portuguese Northeast region, named Viv@vó – living in the grandma's house. This paper presents the ICT platform that was created in this project and some main achievements during the project development process. Tourism and mainly experience and cultural heritage tourism are growing in tourist’s interests. Rural regions have an untapped potential for this slice of tourism industry. Rural regions have an enormous collection of ancestral knowledge that we are responsible to deliver to future generations as an inheritance to which they are entitled.The present work was developed under the Viv@vó Project: "Living in the Grandma's House", with the reference NORTE-01- 0145-FEDER-023637, financed by the Regional Operational Program of the North, Notice 02/SAICT/2016.info:eu-repo/semantics/publishedVersio

Concepts in Management of Advanced Craniomaxillofacial Injuries

The authors present a sequencing assessment of patients who were victims of traumatic deformities of the craniomaxillofacial complex. To that end, the authors highlight the eight steps worthy of particular attention, namely (1) clinical history and photographic documentation; (2) clinical assessment; (3) assessment through image and diagnostic exams; (4) planning of the treatment; (5) bases for the three-dimensional reconstruction of the face; (6) reconstruction sequence of multiple facial fractures; (7) support measures; and (8) complications. The proposed assessment sequence allows the oral and maxillofacial surgeon or craniomaxillofacial surgeon to assess the degree of impairment of traumatic deformity, which contributes in a significant way to the decision-making process of the treatment

Wild dogs at stake: deforestation threatens the only Amazon endemic canid, the short-eared dog (Atelocynus microtis)

The persistent high deforestation rate and fragmentation of the Amazon forests are the main threats to their biodiversity. To anticipate and mitigate these threats, it is important to understand and predict how species respond to the rapidly changing landscape. The short-eared dog Atelocynus microtis is the only Amazon-endemic canid and one of the most understudied wild dogs worldwide. We investigated short-eared dog habitat associations on two spatial scales. First, we used the largest record database ever compiled for short-eared dogs in combination with species distribution models to map species habitat suitability, estimate its distribution range and predict shifts in species distribution in response to predicted deforestation across the entire Amazon (regional scale). Second, we used systematic camera trap surveys and occupancy models to investigate how forest cover and forest fragmentation affect the space use of this species in the Southern Brazilian Amazon (local scale). Species distribution models suggested that the short-eared dog potentially occurs over an extensive and continuous area, through most of the Amazon region south of the Amazon River. However, approximately 30% of the short-eared dog's current distribution is expected to be lost or suffer sharp declines in habitat suitability by 2027 (within three generations) due to forest loss. This proportion might reach 40% of the species distribution in unprotected areas and exceed 60% in some interfluves (i.e. portions of land separated by large rivers) of the Amazon basin. Our local-scale analysis indicated that the presence of forest positively affected short-eared dog space use, while the density of forest edges had a negative effect. Beyond shedding light on the ecology of the short-eared dog and refining its distribution range, our results stress that forest loss poses a serious threat to the conservation of the species in a short time frame. Hence, we propose a re-assessment of the short-eared dog's current IUCN Red List status (Near Threatened) based on findings presented here. Our study exemplifies how data can be integrated across sources and modelling procedures to improve our knowledge of relatively understudied species

The use of dual-lumen balloon for embolization of peripheral arteriovenous malformations

PURPOSEWe aimed to evaluate the safety and feasibility of the embolization of peripheral arteriovenous malformation (AVM) with non-adhesive liquid agents (NALA) injected by dual-lumen balloons (DLB).METHODSWe conducted a multicenter retrospective study between January 2017 and June 2019, including patients with peripheral AVM embolized with NALA by DLB. Fourteen patients were included. The AVM classification, technical and clinical success were evaluated, as were nidus size, liquid agent used, volume and time of injection in DLB, complications, follow-up and need of surgical intervention.RESULTSThe mean age of the patients was 37±22.5 years (range, 6–82 years). The mean nidus size was 5.2±2.4 cm (range, 3.0–12.0 cm). By Schobinger classification, 11 AVMs were classified in stage 3 and 3 AVMs were classified in stage 2. By Cho’s classification, 2 AVMs were in stage II, 4 AVMs were in stage I, 4 AVMs were in stage IIIa and 4 AVMs were in stage IIIb. Onyx was used in 11 patients (78.6%), while Squid, PHIL, and both Onyx and Squid were used in one patient each (7.1%). Seven patients (50%) required one session of embolization, 4 patients (28.6%) required two, 2 patients (14.3%) required three and 1 patient (7.1%) required four sessions. Complete nidus exclusion was achieved in 11 patients (78.6%), optimal clinical response in 12 patients (85.7%). Four patients (28.6%) exhibited minor complications, all controlled. No major complications were seen. Four patients underwent surgical intervention (28.6%). CONCLUSIONThe embolization of peripheral AVM with NALA in DLB appears to be safe and feasible, achieving high rates of technical and clinical success

Validation Of The Ebmt Risk Score In Chronic Myeloid Leukemia In Brazil And Allogeneic Transplant Outcome.

The management of chronic myeloid leukemia (CML) has changed radically since the introduction of imatinib therapy. The decision of whether to offer a patient a hematopoietic stem cell transplant (HSCT) must be based on the probability of success of the procedure. The aim of this retrospective analysis of 1,084 CML patients who received an allogeneic HSCT in 10 Brazilian Centers between February 1983 and March 2003 was to validate the EBMT risk score. The study population comprised 647 (60%) males and 437 (40%) females, with a median age of 32 years old (range 1 - 59); 898 (83%) were in chronic phase, 146 (13%) were in accelerated phase and 40 (4%) were in blast crisis; 151 (14%) were younger than 20 years old, 620 (57%) were between 20 and 40 and 313 (29%) were older than 40; 1,025 (94%) received an HLA fully matched sibling transplant and only 59 (6%) received an unrelated transplant. In 283 cases (26%) a male recipient received a graft from a female donor. The interval from diagnosis to transplantation was less than 12 months in 223 (21%) cases and greater in 861 (79%). The overall survival, disease-free survival, transplant-related mortality and relapse incidence were 49%, 50%, 45% and 25%, respectively. Of the 1084 patients, 179 (17%) had a risk score of 0 or 1, 397 (37%) had a score of 2, 345 (32%) had a score of 3, 135 (12%) had a score of 4 and 28 (2%) a score of 5 or 6. The overall survival (OS) rate in patients with risk scores 0-1 and 2 was similar (58% and 55%, respectively) but significantly better than that in patients with scores 3 or more (score 3 - 44%, 4 - 36 % and 5-6 - 27%, respectively) pp<0.001). Disease-free survival (DFS) and transplant related mortality (TRM) in a patients with a score of 3 or more were 46% and 49%, respectively and the relapse rate beyond score 5-6 was 77%. Disease status had a negative impact on all outcomes (OS, DFS, TRM, and relapse). The OS rate for male recipients of a graft from a female donor was 40% compared to 52% among the other donor-recipient pairs (p=0.004). DFS and TRM were significant for disease phase and female donor-male recipient (p<0.001 and p<0.003, respectively). In our experience, age and interval between diagnosis and transplant did influence OS, DFS, TRM, and relapse rate. Our results validate the EBMT risk score in the context of a developing country and confirm its usefulness for making point decisions in the imatinib era.90232-

Seasonal precipitation in eastern Amazon during rainy season: regional observations and RegCM3 simulations

This paper presents a contribution on the climate modelling studies with emphasis on seasonal rainfall variability in eastern Amazonia, during the austral summer and autumn seasons (DJF and MAM). Based on RegCM3 regional climate simulations for a 26 years period (1982/83 to 2007/08) using high resolution domain scale (30 km) and two different convection schemes (Grell and MIT), it was investigated the model performance to simulate the regional pluviometric distribution in eastern Amazon, with reference to a new observational data base containing regional aspects extracted from a dense rain gauge station network. The quantitative analysis showed that RegCM3 presents systematic errors, especially those related to the dry bias in the Amapá and north/northeast of Pará using both schemes Grell and MIT, which indicate that the model does not reproduce ITCZ characteristics over equatorial Atlantic. The simulations using MIT also indicated wet bias in the southwest/south/southeast of Pará and north of Tocantins. Moreover, through composites technique, it was also investigated RegCM3 response to reproduce the anomalous spatial rainfall patterns in association with ENSO episodes and interhemispheric SSTa gradient phases across the intertropical Atlantic. The results showed that the model represented realistically well the spatial pattern related to the rainfall anomalies above (below) than normal in most of eastern Amazonia, during the known favourable scenarios, i.e., La Niña and south Atlantic SSTa gradient (unfavourable, i.e., El Niño and north Atlantic SSTa gradient).O presente trabalho apresenta uma contribuição aos estudos de modelagem climática com ênfase na variabilidade pluviométrica sazonal da Amazônia oriental, durante as estações de verão e outono (DJF e MAM). Baseado nos resultados das simulações regionais do RegCM3 para um período de 26 anos (1982/83 a 2007/08) e usando domínio em alta resolução espacial (30 Km) e dois diferentes esquemas de convecção (Grell e MIT), foi investigado o desempenho do modelo em simular a distribuição regional de precipitação sazonal na Amazônia oriental, com referência a um novo conjunto de dados observacional compilado com informações de uma ampla rede integrada de estações pluviométricas. As análises quantitativas evidenciaram que o RegCM3 apresenta erros sistemáticos, sobretudo aqueles relacionados com viés seco no Amapá e norte/nordeste do Pará usando ambos os esquemas Grell e MIT, os quais apontam que o modelo não reproduz as características da ZCIT sobre o Atlântico equatorial. As simulações usando MIT, também apresentaram viés úmido no sudoeste/sul/sudeste do Pará e norte do Tocantins. Além disso, através da técnica de composições, também foi investigado o desempenho do RegCM3 em reproduzir os padrões espaciais anômalos de precipitação sazonal em associação aos episódios ENOS, e as fases do gradiente térmico sobre o Atlântico intertropical. Os resultados demonstraram que o modelo conseguiu representar realisticamente bem o padrão espacial das anomalias pluviométricas acima (abaixo) do normal em grande parte da Amazônia oriental, durante os conhecidos cenários favoráveis, i.e., condições de La Niña e gradiente de aTSM para o Atlântico sul (desfavoráveis, i.e., El Niño e gradiente de aTSM para o Atlântico norte