Navegando por Data de Publicação, começando com "2022-07-07"

Filtrar resultados por ano ou mês

Agora exibindo 1 - 4 de 4

Estudo da reação de hidrogenação de CO2 em materiais à base de Cu via catálise heterogênea
(Universidade Federal de São Carlos, 2022-07-07) Caldeira, Ana Clara Rocha; Gomes, Janaina Fernandes; https://lattes.cnpq.br/6718634914051168; https://lattes.cnpq.br/5038796320700062
CO2 is a greenhouse gas whose production has intensified in recent decades, generating its accumulation in the Earth’s atmosphere. Thereby, numerous negative environmental changes, such as the aggravation of the greenhouse effect, have occurred all over the planet. Mitigating approaches have been adopted in several countries around the world, such as the capture and storage of CO2 and the use of renewable energy sources instead of fossil sources. Furthermore, the use of this gas as a carbonaceous input for the production of chemical compounds with high added value is a promising alternative. In this regard, the catalytic hydrogenation of CO2 is a carbon recycling technology that has been explored in recent years. This reaction can occur via electro-catalysis and heterogeneous catalysis at gas-phase. In the present work only the catalytic process at gas-phase will be focused. In this process H2 is used as a hydrogen source and the application of Cu-based catalysts promotes mainly the formation of C1 compounds, such as CO and methanol. These reactions typically occur at temperatures of 200 – 300 °C and under pressures of 2 – 7 MPa. Thus, the investigation of more favorable conditions for the hydrogenation of CO2 at gas-phase on non-noble metals-based materials, such as copper, for the efficient and selective production of high energy density compounds, such as ethanol, ethylene, propane and butanol, is necessary. Recently, in our research group, catalytic studies of CO2 hydrogenation on copper, conducted at gas-phase in the presence of water steam under atmospheric pressure, led to the formation of ethanol. There are evidences that water acts in the stabilization of adsorbed intermediates of the reaction, such as CO, favoring the formation of ethanol. However, the impact of the catalyst properties in this reaction has been poorly explored. In this context, the objective of this work is to study the influence of the copper oxidation state on the CO2 hydrogenation reaction at gas phase in the presence and absence of water steam on Cu materials, aiming at the production of alcohols with two or more carbon atoms (C2+OH). Results of this work showed that ethanol production is more pronounced when we used water steam as a hydrogen source and catalysts with a mixture of oxidized and metallic copper species. Furthermore, it was observed that the presence of oxidized copper species together with metallic copper species was important to improve the productivity of methanol, in addition to ethanol, when H2 was applied as a hydrogen source, indicating the importance of having different copper species to intensify the production of alcohols.
Trajetórias escolares descontínuas na visão de professores da EJA do interior de São Paulo
(Universidade Federal de São Carlos, 2022-07-07) Silva, Vitor Rodrigues Muzel da; Carnio, Michel Pisa; https://lattes.cnpq.br/0198207700485715; https://lattes.cnpq.br/7680972038900128
The present monograph research, of qualitative nature, had as general objective investigate the main phenomena, events or situations that originated discontinuous school trajectories from the conceptions of experienced teachers working in EJA. The data collection carried out in September 2021, coincided with the period that public schools in Brazil were in blended classes due to the COVID-19 pandemic. To obtain data, we used focus group interviews and questionnaires, both face-to-face, with 8 EJA teachers from two public schools located in two cities in the interior of the state of São Paulo. These data were worked and analyzed from the discursive textual analysis of Moraes (2003), providing the opportunity to build four categories of analysis: i) a first general approximation of the reports; ii) EJA as a reflection of the regular education system; iii) the intersections between school, family and work; iv) EJA in the COVID-19 pandemic. In the results, there are multiple correlated factors in the subjects' lives that are decisive in the course of their school trajectories: work, family, public policies, school, poverty, social inequality, among others. During the pandemic, a series of challenges were observed, so that the struggle for fundamental rights, including education, became even more necessary. Nevertheless, situations that generate discontinuous trajectories increased even more during the pandemic. However, situations that generate discontinuous trajectories increased even more during the pandemic. During this period of emergency remote teaching, the indispensability of reflecting on digital information and communication technologies (TDICs), rethinking curricular practices that make sense in the lives of EJA subjects and thinking about the continuing education of teachers was further reinforced.
Pessoas com Deficiência Intelectual em processo de envelhecimento: entendimentos de profissionais especializados
(Universidade Federal de São Carlos, 2022-07-07) Boniholi, Gabriela Ishikawa; Denari, Fátima Elisabeth; https://lattes.cnpq.br/5575213011914394; https://orcid.org/0000-0001-9248-6359; https://lattes.cnpq.br/6772247377063319; https://orcid.org/0000-0003-2978-9175
This research aimed to analyze the perspectives of professionals involved in the care of individuals with intellectual disabilities who are aging, focusing on their understanding of this life stage and established conceptions regarding disability, aging, and their own role in activities of daily living. The main objective was to investigate the understanding of professionals working with individuals with intellectual disabilities aged forty (40) and above, regarding functionality in this stage of life, as well as their perceptions of aging and disability. Specific objectives included: (a) analyzing the functioning of institutions catering to individuals with disabilities in this life stage; (b) exploring how independence in daily life tasks is perceived by these professionals; and (c) examining the role of these professionals in the care of this population. Nine professionals working in special education institutions - referred to as Institution A and B - where adults with intellectual disabilities aged forty (40) and above are located, participated in this research. The professionals included caregivers and healthcare professionals such as physiotherapists, occupational therapists, and gerontologists. Data collection involved semi-structured interviews, and the results were analyzed and categorized into four main themes: (a) Concept of Disability; (b) Aging and Disability; (c) Disability, Aging, and Independent Living; and (d) Professional Roles. These findings were then discussed in line with existing literature in the field. The data gathered indicated that professionals observed signs of premature aging among individuals with intellectual disabilities in both institutions. There were still stigmas regarding the understanding of the concept of "disability" among some interviewed professionals, which could hinder the development of activities aimed at promoting independence due to a perception of dependence. Additionally, the lack of specific training in working with individuals with intellectual disabilities among these professionals was evident, highlighting another factor contributing to the absence of quality care.
"My wild hair": a construção da identidade racial dentro (e através) do ensino de língua inglesa para crianças
(Universidade Federal de São Carlos, 2022-07-07) Santos, Caroline Viviane Silva Simões dos; Paula, Sandra Regina Buttros Gattolin de; https://lattes.cnpq.br/9228036521343293
The purpose of the present study is to promote English teaching as a second language for children from an anti-racist perspective. For that, we share a unit of the courseware "My Wild Hair", supported by a bibliographic-propositional research, of a qualitative nature, having as target audience students in the early years of Elementary School. With and through the proposal, it is intended to build together with the students a valued self-image, providing opportunities for them to recognize themselves as part of their ethnic-racial groups as well as to become aware of the institutional racism and how it dictates and organizes Brazilian society. The teaching strategies of the courseware cover the increment of games in the classroom, exploring the potential of different digital platforms and taking advantage of the motivational content they afford. Here, students are invited to explore the fictional world of Sangoma, from the game “My Wild Hair”, overcoming each linguistic obstacle and developing criticality as well as self-esteem regarding the raised themes. The material is, above all, a reminder about how beauty lies in diversity.