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Validação distribuída do algoritmo paxos no modelo arbitrário não malicioso
(Universidade Federal de São Carlos, 2020-11-03) Santos, Enrique Sampaio dos; Vieira, Gustavo Maciel Dias; https://lattes.cnpq.br/9020007815886406; https://lattes.cnpq.br/3454276903084296
Distributed algorithms have been increasingly used because of commercial and technical factors, especially when the aim is to obtain scalability or high availability of data. Regarding high scalability, stands out the algorithms in which a set of processes interact through the exchange of messages in order to perform the same actions and remain in the same state, called replication algorithms. However, to meet this high demand, it is not enough for such algorithms to be functional, but they must also be fault tolerant, in order to avoid data corruption. Fault tolerance in distributed algorithms is not a trivial topic, and algorithms that tolerate arbitrary failure tend to be costly and complex to implement. In order to tolerate several fault types while keeping the complexity low, the model of arbitrary non-malicious faults was created, where only faults caused by intentional invasions to the environment are not tolerated. This dissertation proposes a distributed validation mechanism for the Paxos algorithm in order to guarantee the properties of the model, making it tolerant to non-malicious arbitrary faults.
Cerâmicas refratárias macroporosas derivadas de espumas ultraestáveis estabilizadas com partículas cerâmicas
(Universidade Federal de São Carlos, 2020-11-03) Santos Junior, Tiago dos; Pandolfelli, Victor Carlos; https://lattes.cnpq.br/7369376873984839; https://lattes.cnpq.br/7913769019155890
Innovation on materials for heat conservation in high-temperature industrial processes is seen as an important strategy for Energy Efficiency. Fundamental studies can support the development of these materials and the adoption of processing routes resulting in lower environmental impact should be considered to produce them. This thesis presents the development of Al2O3-based refractory macroporous ceramics prepared by direct foaming with the help of mechanoquantum simulations. Liquid foams stabilised with Al2O3 particles were developed after partial hydrophobisation of their surfaces with nontoxic amino acids. These foams attained extended lifetime and were stable for more than 100 hours. To produce solid samples derived from them, a binder based on calcium aluminate cement was developed based on mechano-quantum simulations. This binder is comprised of an aqueous suspension of calcium aluminate particles stabilised by gluconate, a non-toxic molecule. The hydration reactions of calcium aluminates were reactivated with a weak organic acid and allowed the production of solid samples with elevated porosity (≥ 70%) and cold crushing strength reaching 30 MPa after thermal treatment. Also, the in situ formation of a phase with lower volumetric density was studied to counteract the volumetric shrinkage of solid samples after firing. Calcium carbonate was used and, after processing at 1600°C for 5 hours, calcium hexaluminate (CA6) was identified. The formation of this phase helped to reduce the linear shrinkage from values close to 19% down to 4% maintaining the total porosity above 80%. The results presented in this thesis pointed out that the combination of computational techniques on quantum level and experimental routes can favour the development of new materials and advanced technologies combining superior performance and a higher commitment to the environment.
Articulações entre ensino e pesquisa em ciências da natureza na formação docente para a prática pedagógica crítica: o olhar dos licenciandos
(Universidade Federal de São Carlos, 2020-11-03) Silva, Nicole de Castro; Silva, Antonio Fernando Gouvêa da; https://lattes.cnpq.br/9621931288117213; https://lattes.cnpq.br/8306328859248792
Teachers can turn to what they saw in the classroom in planning and running their classes, running the risk of reproducing oppressive practices that do not make it possible to construct knowledge meaningfully. This research seeks to investigate whether the Freirean aspects present in the Biological Sciences Degree course at UFSCar Sorocaba influence the students' practices by exercising the teaching role, in order to promote the criticity and emancipation of the citizen, according to the Freirean assumptions (AMARAL; BERBEL; FREIRE; LIBÂNEO; MARIANI; SAUL E SILVA; VASCONCELOS; ZÓFILI). For this investigation, we used the bibliographical survey, documentary analysis of the pedagogical political project of the Course and the semi-structured interview. Presenting duality between theory and practice and raising new problems in relation to the application of critical theory in uncritical times.
Importância dos programas de qualidade de vida para a saúde e desempenho dos colaboradores
(Universidade Federal de São Carlos, 2020-11-03) Ventura, João Victor; Ramos, Paulo Henrique Bertucci; https://lattes.cnpq.br/0148103598149034; https://lattes.cnpq.br/7431366767939218
Quality of life at work is too important for companies to remain competitive in the market and for workers to stay motivated, aligned to the organizational strategy and consequently more productive. The study aimed to analyze the impacts generated in the workers when implementing a quality of life at work program, the challenges to correlate the concepts together with the individual complexity of each collaborator, to verify the consequences of habits in people's lives and the importance of health and well-being in productivity. The methodology used was exploratory of descriptive nature, with data collection through a questionnaire, being a study with quali-quanti analysis. The results showed that there is an increase in the presence of quality of life programs, but it is still below what is considered ideal. There was a contextualization of the programs made by the collaborators and an evaluation as to individual satisfaction. The work presented a limiting factor, which was the lack of proximity with the respondents. The issues involved in the work comprise themes of central interest for deepening and refining the importance of applying quality of life at work programs.