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Bibliometria e análise de conteúdo sobre o ensino por competências na educação em engenharia de materiais
(Universidade Federal de São Carlos, 2022-04-08)
Lopes, Mariana Salgado
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Leiva, Daniel Rodrigo
;
https://lattes.cnpq.br/6576844591900987
;
https://orcid.org/0000-0002-1970-6375
;
https://lattes.cnpq.br/9509308023100332
Engineering education is a field of great importance, due to its ability to graduate strategic professionals to support the socioeconomic growth of the countries. Materials Engineering, for instance, emerged in Brazil with the objective of improve a better use of materials and adding technological concepts that help the generation of wealth for the country. However, for these professionals to be able to perform their role properly, there is a need for holistic education, providing a solid technical base and the soft skills necessary to perform professionally. Thus, much has been debated in recent years about the need to update engineering education around the world. The goal of this work is to aid the teaching and implementation of soft skills in the Materials Engineering course program in the Federal University of São Carlos, through an analysis of bibliometric indicators in competency-based learning publications indexed in the Web of Science database from 2001 to 2020, and content analysis of the new National Curricular Guidelines, the pedagogical course project and the Institutional Modernization Project. The indicators showed a significant increase in the number of publications over the years, indicating a growing interest in this topic. The USA leads in the number of publications in the area, concentrating institutions and researchers with the highest number of publications. A significant portion of the analyzed publications resulted from events on Engineering Education, highlighting the importance of their realization and indexing of publications in databases. The content analysis indicates the need for a greater alignment between the objective of building competences and the pedagogical activities provided for in the course. It was possible to conclude that, the use of unconventional analytical methodologies in the field of Engineering Education, represents a big potential in the investigation of new improving sources in the modernizations of the graduation courses.
Redes neurais para grafos e suas aplicações aos sistemas complexos
(Universidade Federal de São Carlos, 2022-04-08)
Carvalho, Guilherme Michel Lima de
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Rodrigues, Francisco Aparecido
;
https://lattes.cnpq.br/2153014839354888
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https://lattes.cnpq.br/1288291441181363
Complex systems are composed of several components that interact with each other. A natural approach for these types of systems is to use mathematical graph abstraction. In different contexts in the real world, it is possible to use complex network techniques to model these systems. In these systems, dynamic processes such as the spread of information and the spread of disease can occur. In this work we consider the use of artificial neural network techniques for graph-structured data in order to study the propagation of rumor in complex networks and the detection of community structures. For the proposed case of rumor, a model was developed based on graph neural networks for the porpuse of detected the source of the a rumour in graphs with community structure and for community dectection was evaluate the potential of graph neural networks in comparison to traditional methods of the network science.
Qualidade físico-química e armazenamento pós-colheita de frutos de genótipos de lima ácida Tahiti
(Universidade Federal de São Carlos, 2022-04-08)
Guilmo, Leonardo da Silva
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Azevedo, Fernando Alves
;
https://lattes.cnpq.br/0574692206149746
;
Conceição, Patrícia Marluci da
;
https://lattes.cnpq.br/6623193710607120
The Brazilian citrus industry is among the largest in the world, with a consolidated and growing market, with this, the demand for quality fruits for the domestic market and, mainly, for export, has been increasing. In BAG Citros IAC there are 23 accessions of acid lime (Citrus latifolia), the species has been exploited internationally as an “in natura” fruit, exported in large quantities by Brazil, especially to the European continent, but other alternatives for use for domestic market are concentrated juices, the main use of acid lime in Brazil, presenting high added value and with high investments. The objective of this work was to select genotypes of Tahiti acid lime (Citrus latifolia) in terms of vegetative development and productivity, physicochemical characteristics and post-harvest storage of the fruits. Initially, 12 acid lime genotypes were evaluated (IAC 304/IAC 5, IAC 616/IAC 10, BRS Ponta Firme, IAC 302, IAC 1728, IAC 654, CNPMF 02 IAC 1491, IAC 303, Folha Murcha IAC, Quebra Galho Catanduva, Quebra Galho Mogi Mirim and Quebra Galho Paranapuã) regarding the vegetative and productive development, and physicochemical characteristics of the fruits (Experiment 1). Subsequently, three genotypes were selected for evaluation of productive development and post-harvest testing, where the fruits were divided into standards for commercialization in the domestic and foreign markets (Experiment 2). The evaluations started in the second half of 2019 and ended in the second half of 2021. The genotypes IAC 304/IAC 5, IAC 616/IAC 10 and BRS Ponta Firme showed greater vegetative and productive development in March (2020), in addition, presented good results, staying within established standards for mass, conformation index, juice yield, vitamin C, total soluble solids, titratable acidity, ratio and technological index. In experiment 2, the IAC 616/IAC 10 and BRS Ponta Firme genotypes showed higher productivity compared to the IAC 304/IAC 5 genotype, in March (2021); and in the post-harvest test were also highlights, for fruits with standards for domestic and foreign markets, with less loss of mass and less loss of dark green color. There were no significant differences between genotypes for juice yield, vitamin C, soluble solids, acidity and ratio. Of the genotypes studied, IAC 616/IAC 10 and BRS Ponta Firme showed higher productivity and good results for physical-chemical analysis and post-harvest testing, showing potential to be new commercial varieties for Brazilian citrus industry.
A percepção de moradores da região de Sorocaba sobre plantas frutíferas e a relação com o ensino de botânica
(Universidade Federal de São Carlos, 2022-04-08)
Cavallari, Bianca Lacerda
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Souto, Letícia Silva
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https://lattes.cnpq.br/9284280370140756
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https://lattes.cnpq.br/0558828152726805
Plants and humans have been connected since the start of our human evolution, since its first use in meals, which culminated in the domestication of many vegetable species until the present date, when plants are used by mankind in various ways. Even though they have such an important role in the life of humans, what makes them so uninteresting to students? Theory-dense classes with contents disconnected from the student reality and the absence of science labs are only some of the points observed in studies about the matter. To understand a bit better the relation between human beings and plants, a questionnaire was created, which was presented to the citizens of the Sorocaba metropolitan region with the goal to observe if it would be possible to identify plant species without the presence of their fruit. The questionnaire also contained questions about the environment the person lived in and how was their relationship with plants during their childhood. Those that had the least correct answers were also those who said to have no contact with plants in their day-to-day life and also remembered a low number of botany topics from their school years. The opposite was also true. These results can be explained by the growth of plant blindness in our society. The plant blind person cannot identify plants around them as nothing more than decoration instead of living organisms that provide so much to humans. To fight plant blindness, it is important to diversify botany classes utilizing more practical lessons and experiments and introducing botanical topics since the first years of schooling.
Formação de professores e educação de pessoas com deficiência: concepções de docentes formadores
(Universidade Federal de São Carlos, 2022-04-08)
Almeida, Luisa de Souza Leão
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Vilaronga, Carla Ariela Rios
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https://lattes.cnpq.br/6536774151778096
;
https://lattes.cnpq.br/7388884197089208
The development of human resources, specifically the training of secondary teachers, is considered one of the pillars of the inclusive education of disabled students. However, it has been suggested that the undergraduate training received by teachers has not been enough for them to co-create an equity environment for all students. Given this scenario, it is necessary to investigate from what conceptions instructors who train secondary teachers have conducted their training practices. Thus, this study aimed to analyze post-secondary instructors who teach courses on the theme of education of disabled people. Also, we wanted to understand their conceptions about the structuring of disciplines related to this theme and its relationship with the training of future professionals. The research was characterized as a case study conducted at the Universidade Federal do Pará, with the participation of seven instructors from undergraduate courses who teach subjects related to the education of disabled people. Data collection was carried out in two stages: 1) document analysis, referring to the mapping of subjects related to the education of disabled people taught in undergraduate courses on five university campuses; 2) field study, which consisted of conducting semi-structured interviews with university professors. Data analysis was based on the Method of Interpretation of Meanings, which includes three phases: understanding, exploration and interpretative synthesis. The results gave rise to five thematic axes. Axis A, referring to teachers' training and performance paths in the field of Special Education, indicated differences in the following dimensions: a) specific academic training in the area; b) personal, professional or institutional factors and motivations. Axis B, referred to concepts about curriculum and didactics for the education of disabled people. It was identified that, of the 21 undergraduate courses analyzed, 20 had a Libras subject and seven had general subjects in the area of Special Education. Still, in regards to this axis, teachers pointed out that such subjects impact training by sensitizing future teachers and offering initial instruments for their performance. Axis C dealt with institutional aspects and accessibility at the university, indicating a lack of human resources. Axis C results showed the existence of additional training spaces beyond regular training, such as research and extension, especially in Libras. Axis D referred to teachers' conceptions of disability. The results pointed to the perception of individual and institutional barriers present in different relationships with disabled people and the understanding of the need to produce attitudinal changes across disciplines. The organic, social and metaphysical concepts permeated the analyzed discourses. Axis E allowed the knowledge of conceptions about education for disabled people. The results pointed to dimensions such as affection and empathy regarding this process and the importance of legal aspects in the face of perceived resistance. The Specialized Educational Service appeared as the primary reference model for the education of disabled people. The dialogue with the training teachers proved to be decisive in elucidating conceptions and discourses about disabled people, who circulate in different social spaces and impact the training processes.
O empreendedor institucional e a inserção de pequenos agricultores familiares no mercado: o Projeto Agro Família
(Universidade Federal de São Carlos, 2022-04-08)
Arciprete, João Paulo Rodrigues
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Souza Filho, Hildo Meirelles de
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https://lattes.cnpq.br/3740950346967524
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https://lattes.cnpq.br/8946449681000920
There is a large number of public policies aimed at family farming in Brazil. Access to these policies could help farmers to better integrate into distribution channels such as supermarkets, bars, restaurants, street markets and city halls. However, a set of barriers continues to impede access to markets, such as the fierce competitive environment, greater demand for food quality and safety, increased production scale, among others. This thesis establishes two propositions. The first is that many barriers persist due to the absence of an intermediary institutionality capable of bridging the gap between the general rules of established policies and the needs of small producers. The second is that the creation of this institutionality can be carried out through institutional entrepreneurs. The New Institutional Economics was used as a theoretical framework. It is proposed that it is necessary to observe what Menard (2017) classified as meso-institutions, that is, a fundamental institutionality so that rules and rights established at a macro level, such as those established in government law programs, are interpreted and implemented in a micro level. The transformation or creation of this new institutionality can arise through the actions of entrepreneurs with the necessary resources to take advantage of the opportunities to make changes (Dimaggio;1988). To demonstrate these propositions, the case of the Agro Família Project was examined, in which the Brazilian Support Service for Micro and Small Enterprises (SEBRAE), the National Rural Learning Service (SENAR) and other organizations acted with the objective of creating an institutional framework that would allow family farmers in the region of Ribeirão Preto, SP, to be included in commercialization channels, such as direct sales to consumers at street markets, restaurants, bars and municipal governments. Data were collected through participant observation, documentary analysis and interviews with 49 producers, 3 leaders of producer organizations, the Sebrae consultant responsible for serving the farmers and 24 nutritionists and/or responsible for school meals in the municipalities in the region. The data allowed identifying the barriers faced by producers and confirming both propositions. The performance of institutional entrepreneurs, such as Sebrae and Senar, allowed the overcoming of barriers and, therefore, the commercialization of products within the scope of the PNAE, in the local retail trade, in street markets and home deliveries. The role of these organizations was to build the necessary bridges to overcome obstacles, assuming a governance role in the process of eliminating barriers, where they were accepted for having social legitimacy and ability to deal with the public and private sectors. This thesis corroborates with different studies that characterize the institutional entrepreneur and the creation of new institutionalities, considering the situation of organizational fields and the existence of institutional voids as a generator of opportunities for entrepreneurial action. The study also contributes to the advancement of studies on institutional entrepreneurship in promoting changes and/or creating meso-institutions.
Qualidade físico-química e tolerância à Phyllosticta citricarpa, Elsinoe fawcettii e “Candidatus Liberibacter spp.” em genótipos de limão (Citrus limon)
(Universidade Federal de São Carlos, 2022-04-08)
Ronquim, Júlio Cesar Sammarco
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Azevedo, Fernando Alves
;
https://lattes.cnpq.br/0574692206149746
;
Conceição, Patrícia Marluci da
;
https://lattes.cnpq.br/6623193710607120
Lemon genotypes are affected by several diseases that jeopardize their productive sustainability. This study aimed to evaluate the physicochemical quality of fruits and the incidence and severity of citrus black spot diseases (Phyllosticta citricarpa), Verrugose (Elsinoe fawcettii) and HLB (Candidatus Liberibacter spp.) in three lemon genotypes. . The work was carried out on plants and fruits harvested from the Citrus Working Collection of the Citriculture Center 'Sylvio Moreira', established in 2015/2016. In this work, the physicochemical quality of fruits (mass, height and width of the fruits, juice yield, Vitamin C content and essential oil yield) and the incidence and severity of diseases in three main lemon genotypes were evaluated: Eureka IAC 644, Feminello Sta T-2 IAC 272, Lisbon IAC 267. The evaluation data were submitted to analysis of variance and the means of the analyzes were compared by the Scott-Knott test at 5% probability. The mass and height of the fruits of the three genotypes with HLB symptoms were lower in relation to the asymptomatic fruits. In the evaluation of juice yield, the symptoms of black spot and HLB reduced the juice yield of some genotypes: Eureka IAC 644 (MPC), Femminello Sta T.-2 IAC 272 (MPC), Lisboa IAC 267 (HLB) and Femminello Sta T.-2 IAC 272 (HLB). Juice from fruits with HLB symptoms of the Eureka IAC 644 genotype had lower vitamin C content compared to this asymptomatic genotype. The essential oil yield was lower when the genotypes presented HLB symptoms, in relation to the asymptomatic genotypes. The Femminello Sta Tereza IAC 272 and Eureka IAC 644 genotypes had a higher incidence of MPC than the Lisboa IAC 267 genotype. The black spot severity in the Feminello Sta Tereza IAC 272 genotype was higher than the Eureka IAC 644 and Lisboa 267 genotypes. There was no difference. in the incidence and severity of warts among the three genotypes. Of the evaluated genotypes, Eureka IAC 644 and Femminello Sta Tereza IAC 272 showed higher HLB severity in relation to the Lisboa IAC 267 genotype. It is concluded that the fruits of the Eureka IAC 644, Lisboa IAC 267 and Femminello Sta Tereza IAC 272 genotypes with symptoms of HLB has lower mass, height, juice yield and oil yield compared to asymptomatic genotypes. The Lisboa IAC 267 genotype has higher tolerance to HLB compared to the other genotypes.
Aplicação de sensores eletroquímicos com (nano)materiais de carbono na área de Food Safety: uma revisão bibliográfica
(Universidade Federal de São Carlos, 2022-04-08)
Silva, Ingrid Aparecida Félix da
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Ferreira, Luís Marcos Cerdeira
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https://lattes.cnpq.br/6938778456306699
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Vicentini, Fernando Campanhã
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https://lattes.cnpq.br/2380414092419355
Food safety and food security are extremely relevant concepts worldwide, so they are covered in three of the seventeen sustainable development goals of the United Nations (UN) and such concepts start from the human right to have access to healthy food, sufficient for survival and safe. The UN estimates alarming numbers of people who fall ill or die from contaminated food. Among the contaminations are those from pesticides due to intoxication due to acute exposure, intentional adulterations of foods that are carried out in order to increase productivity or even prevent the product from being discarded due to inadequacy to the standards established by legislation and deadline validity; food contaminated by microorganisms such as fungi and bacteria, which can cause serious health consequences; and also the migration of components from packaging to food at undesirable levels. Having identified the health risks that these contaminants can generate, it is essential to have scientific techniques and methods as a means to guarantee the quality of what will be consumed. The use of electrochemical sensors modified with carbon (nano)materials has become a very promising approach in recent years due to their low cost, ease of handling and the possibility of performing on-site analysis. Carbon nanomaterials include carbon nanotubes, graphene, quantum dots, among others; are widely used in electrochemistry due to their excellent physicochemical properties such as chemical stability, mechanical strength and excellent electrical conductivity. In order to review the most recent electrochemical sensing techniques in the area of food safety using carbon (nano)materials, a review was carried out from academic works searched in databases using specific keywords and publication period so that it was possible to find articles that integrate the theme. It was noted that carbon nanomaterials have great potential in electrochemical sensing, in addition to showing compatibility with different types of inorganic materials such as metallic nanoparticles, phosphorene and zinc oxide, but also with organic materials and biomolecules such as polyaniline, aptamers and beeswax, highlighting the range of uses and possibilities of modification of working electrodes, leading to the development of increasingly sensitive methods that include the detection of a variety of contaminants found in the food production chain.
Custos no processo de refino do petróleo: um estudo de caso da refinaria Alberto Pasqualini (REFAP)
(Universidade Federal de São Carlos, 2022-04-11)
Oliveira, Matheus Raposo Gonçalves de
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Queiroz, João Paulo Silva
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https://lattes.cnpq.br/7316247674511327
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https://lattes.cnpq.br/0632465014958748
Even with the growing demand for sustainable energy sources in recent decades, oil products continue to be the main fuels used in the world, also having several applications in various areas of industry. The oil refining process is very extensive in costs, with several operations that have the purpose of adapting the product to the necessary specifications in the market and having its profits fluctuating in a very volatile way, according to several factors that influence oil prices and its derivatives. This work aims to perform a study of the main costs involved in the oil refining process, analyzing the production units of a refinery, its main energy demands and operational expenses, thus being able to evaluate the impact that each production unit has on the fixed and variable costs within a plant. The study was carried out from available data from refineries in operation and cost research associated with the unit operations involved. From these costs and the prices of the commodities involved, which vary constantly, being traded on the stock exchanges, it was defined the refining margin of a Brazilian refinery, chosen as a model, in certain historical periods and was verified which production units had the greatest impact on costs. With the methodology used, it was possible to observe that the atmospheric distillation and catalytic cracking were the most expensive units, also finding the high impact that raw material costs had in the historical period, being the main costs of the studied refinery.
Definição de estratégias de vendas na indústria química
(Universidade Federal de São Carlos, 2022-04-11)
Oliveira, Leonardo Silveira
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Bernardo, André
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https://lattes.cnpq.br/5705402824877708
n the chemical industry scenario, there is a high complexity in identifying competitive advantages for each company and, from that, defining the best sales strategy. This is due to the diversification of the sector, since there are subdivisions into smaller areas with specific characteristics. In view of this, it is important to analyze a set of definitions of these subdivisions and the practices used in the scenario that most collaborate with the development of an industry, thus understanding the entire sales strategy for each type of business, considering its particularities. and market trends. The objective of this work was to define the main sales strategies of the industry through a bibliographic review of materials related to the theme, with a critical, analytical and exploratory reading, under a qualitative approach of the selected materials. The starting point was the identification of different sectors within the chemical industry and their characteristics, making a survey of the main competitors of each one. From this, industry practices related to the implementation of improvements in the points highlighted as competitive advantages were raised and, finally, the main sales channels used by the chemical industry were raised.
Implementação de treinamento para padronização de normas de biossegurança no LaFaC, LaTecC e LaDABio
(Universidade Federal de São Carlos, 2022-04-11)
Piassi Filho, Marco Aurélio
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Horta, Antonio Carlos Luperni
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https://lattes.cnpq.br/5923938048634505
This work shows the current worldwide relationship with Biosafety protocols in Laboratories, presenting the main practices to guarantee a safer environment for handling living beings. The Department of Chemical Engineering at UFSCar currently has biotechnology laboratories that present microorganisms that require safe handling and, therefore, adequate training of users. Previous work by the group identified the main improvements that could be applied in the training offered to users of LaTecC, LaFaC and LaDABio, such as organization of access and standardization of training materials. In this context, Google applications were used to centralize training and control their execution for teachers and students who make use of these laboratories. For this, a policy was developed in which the recurrence of training, responsibilities, where to find the training and a menu to consolidate good practices for the use of laboratory space, which may even be used by other interested groups, are presented. The training consists of six modules and six assessments to assess user learning. The implementation in PoCA (Portal de Cursos Abertos - UFSCar) is a suggestion for future works related to the topic.
O direito de ingresso das pessoas com deficiências na Educação Superior: atos e agentes administrativos em tela
(Universidade Federal de São Carlos, 2022-04-11)
Machado, Jairo Maurano
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Cabral, Leonardo Santos Amâncio
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https://lattes.cnpq.br/5306031040506357
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https://lattes.cnpq.br/6839756025507159
The admission's right of people with disabilities to Higher Education was recently evidenced by the system of reservation of places, mandatory at the level of education. However, when two candidates with disabilities occur from the registration and will not be accepted, the question arises: what are the institutional ways to guarantee the income right to the population, when it is for? In this scenario, this research aimed to identify and analyze the institutional instruments available to guide the effectiveness of the income of people with disabilities in Higher Education outside a Public Institution in the State of São Paulo. Specifically, it is intended to: a) identify and portray the acts performed by the institution to legitimize the rights of people with disabilities; b) know and discredit the acts performed by the candidate with a disability to fulfill his right to income; c) analyze, based on the data identified, the process of legitimizing the right to income for people with disabilities in Higher Education from a biopsychosocial perspective. The study was determined in two dimensions of analysis: a) candidate students; b) institutional staffs. It is a case study and documental, analytical-critical-descriptive, which uses public and institutional archives, whose contents are treated with the use of specific registration protocols and analyzed from the perspective of Disability Studies. The research reveals materialities inherent to the right to income of people with disabilities in Higher Education and the institutional contributions to legitimize it. The results obtained indicate the need to review two documents guiding two selection processes. In public practice, they do not always reach all candidates and distortions sometimes occur when there is a fear of a conception of disability in the social model.
O ensino remoto durante a pandemia nas escolas da Educação Básica de São Carlos na visão dos professores
(Universidade Federal de São Carlos, 2022-04-11)
Oliveira, Karina Domingos de
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Carnio, Michel Pisa
;
https://lattes.cnpq.br/0198207700485715
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https://lattes.cnpq.br/5463430776928206
The outbreak of the Covid-19 virus reached billions of students around the world and ended up bringing traditional school classes to a halt in Brazil, as in many other places. This work proposes to understand the perception of teachers about the adoption of remote teaching during the pandemic. A qualitative research approach was used through semistructured interviews with three elementary school teachers in the city of São Carlos. The data generated from the interviews were analyzed according to the Discursive Textual Analysis of Moraes (2003), which resulted in four major categories of analysis: Technological Resources and Teacher Training, Proletarianization of Teaching Work, Teaching Autonomy and School Hierarchy and Communication and Support between Educational Agents. In this way, it was possible to identify that the adoption of remote teaching brought the perception of an increase in working hours, related to the adaptation and construction of the skills to operate new tools needed in this different environment. We also identified in the participant teachers who felt that they were not part of the remote teaching implementation decision taking, mostly because the relations of authority and hierarchy of the school environment significantly reduced the autonomy of the teachers during the pandemic, in addition to not taking into account the experiences lived by them. Finally, it was possible to conclude that collective work through the sharing of experiences among fellow teachers proved to be a factor of professional enrichment in this period. Through this research, we identified the need to investigate the relationship between teachers and students, an aspect that was not presented as the main focus of this work but which is extremely relevant for the teaching-learning process in the current times, as well as elements related to the possibilities expansion of dialogues between teachers and educational authorities, which were included in the analyzes but which must be deepened, given their complexity and importance for the development of education in Brazil.
Efeitos de defensivo agrícola em levedura para ração animal
(Universidade Federal de São Carlos, 2022-04-11)
Alvim, Maurício Vidal
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Batista Júnior, Ronydes
;
https://lattes.cnpq.br/5724682552766276
;
Horta, Antonio Carlos Luperni
;
https://lattes.cnpq.br/5923938048634505
Brazil is one of the largest ethanol producers in the world, within the production there is a facultative unicellular organism, the yeast, responsible for the bioreaction that transforms glucose and fructose, present in the sugar cane juice, into ethanol and more cells. As it is produced in large quantities, the yeast is used for the production of supplement for animal ration, Inactive Dry Yeast and Cell Wall. In Brazilian sugar cane fields the pesticide use, like herbicide, fungicide, insecticide etc, mostly is performed in an indiscriminate way and without supervision. The regulatory bodies does not do the right control and inspection on the use of these products. The leaflet of these products do not contains information of a potential danger after the decomposition of these products in soil or in the plants and how can these resulting products affects the food security and human or animal health. In these work the focus was on agricultural pesticides that contain the active ingredient MSMA (Monosodium Methyl Arsonate or Monosodium Acid Methanoarsenate), and how their by-products can affect animal health, and indirectly human health through animal feed. From the sugar-cane farming to the packed dry yeast, there are a large number of operations, but they do not include the removal of possible contaminants before reaching the final product. Finally, there are the recommendations for abolishing the use of this pesticide in Brazilian crops.
Impacto das propostas de alteração do mapa de ventos no projeto de edifícios em concreto armado no Brasil
(Universidade Federal de São Carlos, 2022-04-11)
Dias, Lucas Vitoretti
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Almeida Filho, Fernando Menezes de
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https://lattes.cnpq.br/0447825383222965
;
https://lattes.cnpq.br/2891424597188503
The wind action is one of the most relevant for the design of reinforced concrete buildings, especially in recent years with the growing demand for taller and slender buildings. Thus, it is essential that this action be determined accurately and in accordance with reality, to ensure both the safety of the building and its occupants as well as the economic feasibility of the project. In Brazil, the process of determining the wind action is established by ABNT NBR 6123 (1988), considering that it is already 34 years old and is based on a study of isoplet maps of Brazil of almost 50 years, it is currently under revision. Therefore, the objective of this work is to evaluate the impact that the proposed isoplet maps presented as suggestions for the revision of the wind standard will have on the design of reinforced concrete structures in several regions of the country for buildings of various heights. Structures of 4, 10 and 20 floors were evaluated using the commercial software TQS, in 8 cities with different basic wind speeds, and both the Ultimate Limit State and the Service Limit State of the structure were studied. The results indicate that for 4-story buildings there is no impact on the design with the change of the wind speed, whereas for 10 and 20-story buildings the results point to a more significant impact. Furthermore, the analysis of the results and the isoplet maps proposals make clear the need for revision in ABNT NBR 6123 (1988).
Avaliação molecular do fígado de girinos de rã-touro americana (Lithobates catesbeianus) por espectroscopia de infravermelho com transformada de Fourier (FTIR)
(Universidade Federal de São Carlos, 2022-04-11)
Souza, Eduardo Garcia
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Carvalho, Cleoni dos Santos
;
https://lattes.cnpq.br/7233550271936621
;
https://orcid.org/0000-0003-0755-5239
;
https://lattes.cnpq.br/6358077697283470
Fourier Transform Infrared Spectroscopy – FTIR – is an easy-to-perform technique that can be applied to different types of samples, such as: solids, liquids, gases, semi-solids, polymers, biological materials, among others. The present work used the FTIR technique to detect possible molecular alterations in the liver of American bullfrog tadpoles (Lithobates catesbeianus) exposed to water collected from the Itupararanga dam in Votorantim (BV) and its reservoir in Ibiúna (RI); both points belong to the Sorocaba river. In this study, molecular changes were observed in the range of 3200 – 2600 cm-1 of the infrared spectrum for the liver of tadpoles exposed to the collected water. The observed changes may be associated with the presence of metals (Al, Cd, Mn and Zn) in the water. Although alterations have been identified in the spectra of the samples that were exposed to the water collected in relation to the control, complementary analyses to this study need to be carried out so that the exposed is, in fact, confirmed. Therefore, in this work, it was endeavoured to understand the changes observed in the spectra and also to propose the use of this technique as an alternative tool for application in ecotoxicology.
Análise da influência de injeção de água sobre o escoamento de ar em um lavador Venturi utilizando Ansys Fluent
(Universidade Federal de São Carlos, 2022-04-11)
Sobral, Beatriz Moraes
;
Béttega, Vádila Giovana Guerra
;
https://lattes.cnpq.br/0752059622240208
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https://lattes.cnpq.br/9407939075077544
Computational Fluid Dynamics (CFD) is a tool that simulates internal and external flows by solving models through numerical methods until reaching a predetermined value for convergence, with the advantage of reducing costs and time in data collection. The equipment that was studied was a Venturi scrubber with circular section because it is traditionally used in industries due to its high efficiency in gas scrubbing. Due to the fact that the atomization of the water jet occurs due to the high velocity of the air in relation to that of the liquid and that the fluids flow perpendicularly, the scrubber performance is influenced by factors such as the liquidgas ratio, the pressure drop and the configuration of the water injection holes. The main goal of this work was to check the influence of the liquid inlet on the air flow in a vertical Venturi scrubber with circular section and, for that, simulations were performed using the Fluent software contained in the Ansys Student 2021 R1 package. In the simulations, the gas inlet velocity and the water inlet diameter were kept constant, while the number of holes were varied from 1 to 4 and the liquid inlet velocity values were 4.5; 6.5 and 8.5 m/s; in addition, results were obtained for cases in which there was no water injection, in order to compare the scenarios obtained. Considering the data collected for the same mesh, the greater the number of holes, the bigger the pressure drop obtained and, the higher the water inlet velocity, the greater the pressure drop and the longer the penetration of water. As for the quality of the meshes, their refinement resulted in more accurate results and smoother curves with lower computational cost; thus, better results were obtained in the same range of number of iterations. In view of the results obtained, the scenario indicated would be of 4 holes with water inlet at 6.5 m/s due to better distribution of liquid within the equipment, absence of vortices and higher velocity in the central region of the equipment.
Compactly-supported and relative integration in differential cohomology
(Universidade Federal de São Carlos, 2022-04-11)
Barbosa, Brenno Gustavo
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Ruffino, Fabio Ferrari
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https://lattes.cnpq.br/2512107188781159
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https://lattes.cnpq.br/4460266811084097
In this work, we have constructed more general versions of differential integration maps in differential cohomology theories. Among the obtained versions we can mention the integration with compact supports, the integration with vertically compact supports and their relative versions. To obtain these maps, it was necessary to construct a special product between parallel and relative differential classes and to extend differential cohomology theories to a category of sequences of manifolds.
Proteínas moonlighting e sua relação com a patogenicidade da bactéria Xanthomonas citri subsp. citri, causadora do cancro cítrico
(Universidade Federal de São Carlos, 2022-04-11)
Ferreira, Jéssica Camila
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Souza, Dulce Helena Ferreira de
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https://lattes.cnpq.br/3428955299526003
Citriculture has been present in Brazil since its colonization when orange seedlings were imported and commercialized. Due to the fertile soil and favorable climate, over the decades, Brazil has become the largest producer of oranges and exporter of orange juice worldwide, generating a lot of profit for the country. Nevertheless, over time, several diseases that bring significant losses to the citrus industry have also developed, and many of them still have no cure. Citrus canker is one of them and is caused by the bacterium Xanthomonas citri subsp. citri (Xac). Many investigations have been carried out to elucidate the infection mechanism of the bacteria in the host, how they defend themselves and why they are so virulent. After a proteomic analysis of the cell surface performed on Xac under two different conditions, host infection and non-infection, different amounts of some proteins on the surface were found, being many of them already reported and related to virulence in other bacteria and classified as moonlighting proteins, which are proteins that have a well-defined function usually in the cytosol, but were also found performing completely different functions in other cellular regions, mostly on the surface. Such proteins may be related to biofilm production, defense response against the host, adhesion of bacteria to surfaces, and various other functions. Studies in recent years have tried to unravel their possible recognition mechanisms inside the cell and how they are secreted out, as well as trying to understand what functions they have when they are on the surface. In this work, the topics mentioned above were addressed in detail and the possible relationship of surface moonlighting proteins with the virulence of the citrus canker-causing bacteria was discussed.
Sensores baseados em nanofios semicondutores de SnO2: fotodetector de luz UV e sensor de gás
(Universidade Federal de São Carlos, 2022-04-11)
Araujo, Estacio Paiva
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Chiquito, Adenilson José
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https://lattes.cnpq.br/7087360072774314
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https://lattes.cnpq.br/5669604578234007
In this work, sensors employing SnO2 semiconductor nanowires as active layer for gas and light detection were built. SnO2 nanowire samples were grown by VLS (VapourLiquid-Solid) method and morphological and structural properties were analyzed. XRD results exhibited SnO2 tetragonal rutile phase, within space group P42/mnm and lattice parameteres of a = b = 4.73 Å and c = 3.18 Å (JCPDS 41-1445). SEM images confirmed the desired morphology and TEM images revealed monocristaline character. Two different sensors’ architecture were chosen: a Metal-Semiconductor-Metal (MSM) with a nanowire network and a Field Effect Transistor with a single nanowire (NWFET). Current-voltage measurements of the SnO2 nanowire network devices with and without ultraviolet (UV) and visible (VIS) irradiation ranges were studied. Results indicated that a barrier is formed between the nanowire network and metallic contact when in absence of light, whereas under UV illumination there was an appreciable photoconductive gain and a small one under VIS illumination. NWFET’s values of charge density and mobility were estimate, of 1.6x1019 cm-3 and 3.7x10-4 cm2/Vs, respectively. Under UV illumination, the NWFET presented an ambipolar behavior, while under VIS illumination a unipolar response. SnO2 nanowire network’s photoresponse had a ION/IOFF ratio of 170 and 8.2 for UV and VIS light, respectively. In addition, response time was 2.8 s for UV light and 98s for VIS light, althought UV light measurements presented multiple decay times of 0.55 s and 145.84 s and for VIS light only one decay time of 153 s. NWFET photodetector response curves displayed a ION/IOFF ratio of 309 and 57 for VDS = + 1 V and VDS = - 1 V, respectively. For a positive voltage, VDS = + 1 V, the rise time was about 0.59 s and decay time was 0.63 s. Under a negative applied voltage, VDS = - 1 V, rise and decay times were 0.68 s and 0.75 s, respectively, were obtained. For the VIS light condition, no photocurrent variation in the NWFET was observed. The SnO2 nanowire network device was also used to study gas sensoring at room temperature. Sensor response, (), was found to be about 32 % and 9 % for acetone concentrations of 970 ppm and 50 ppm, respectively. In order to optimize and enhance the reponse, differentvii values of applied voltage were tested, resulting in a response of 32 % for V = + 9 V and 49 % for V = + 0.1 V. Given that, smaller values of applied voltage improved our sensor’s response.