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- Campus Samambaia, Campus Colemar Natal e Silva, Campus Aparecida de Goiânia.
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Item type: Item , Revestimento por fricção da liga de alta entropia CoCrFeMnNi: desenvolvimento microestrutural e resistência a corrosão(Universidade Federal de Goiás, 2025-08-29) Oliveira, Cristiano Faria de; Campo, Kaio Niitsu; http://lattes.cnpq.br/5821772986038888; Troysi, Fernanda Christina Teotônio Dias; http://lattes.cnpq.br/0775840085703413; Troysi, Fernanda Christina Teotonio Dias; http://lattes.cnpq.br/0775840085703413; Cunha, Daniel Fernandes da; http://lattes.cnpq.br/7364532451621106; Brito, Pedro Paiva; http://lattes.cnpq.br/6655220210646928This research addresses the development and characterization of coatings with highentropy alloys (HEAs), with a specific focus on the CoCrFeMnNi alloy, applied to carbon steel and stainless steel substrates by means of the friction surfacing (FS) process in CNC machining centers. The main objective was to improve the FS process in CNC machining centers, aiming at producing CoCrFeMnNi coatings on these substrates. The methodology involved the preparation of alloy samples by arc melting, followed by forging and machining to obtain consumable rods. Friction surfacing was carried out in a CNC machining center, with controlled parameters to ensure coating quality. Microstructural characterization was performed using scanning electron microscopy (SEM), X-ray diffraction (XRD), and electron backscatter diffraction (EBSD), while penetration resistance was evaluated through Vickers microhardness measurements. The corrosion resistance of the coatings was analyzed by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in 0.5 M H₂SO₄ solution. The results indicated that the CoCrFeMnNi coatings exhibited a homogeneous microstructure with the formation of a face-centered cubic (FCC) phase. Microhardness measurements revealed values lower than those of the as-cast alloy, averaging between 200 and 220 HV. Despite the heterogeneous microstructure reducing the initial corrosion resistance, the CoCrFeMnNi coating exhibited superior passivation in 0.5 M H₂SO₄ compared to 316L steel, suggesting greater potential in passivating environmentsItem type: Item , Maternidade enquanto espaço de resistência: um estudo exploratório de narrativas de mulheres negras goianas(Universidade Federal de Goiás, 2025-03-24) Aquino, Pabliny Marques de; Lima, Priscilla Melo Ribeiro de; http://lattes.cnpq.br/5233347099900059; Lima, Priscilla Melo Ribeiro de; http://lattes.cnpq.br/5233347099900059; Lago, Marilucia Pereira do; http://lattes.cnpq.br/4323131996569717; Marciano, Rafaela Paula; http://lattes.cnpq.br/2719045150171823This research seeks to analyze the impacts of racism on maternal relationships, focusing on the stories of three Black women residing in Goiânia. Adopting a qualitative and psychoanalytic approach, the study explores how these women's experiences are shaped by racism in its many facets, revealing both oppression and resistance processes. The Life Narratives methodology, as proposed by Bertaux (2010), facilitates access to these women's stories. The analysis follows Ricoeur's (1983/1994) tripartite mimesis framework, allowing a profound exploration of the narrators' subjective field and their connection to the symbolic and sociocultural spheres.The research also employs psychoanalytic concepts to discuss the formation of subjectivity and to articulate the subjective dynamics that permeate these women’s maternal relationships. Engaging with theorists such as Piera Aulagnier, Lélia Gonzalez, and Neusa Santos Souza, the study integrates historical and social perspectives to understand the specificities of Black motherhood as a psychosocial and racialized phenomenon. Methodological choices reflect an ethical-political commitment and an alignment with Black identity, expanding the debate on motherhood and resistance beyond conventional frameworks. The stories of these women are marked by pain and revolt, as well as by love and resilience, resonating with the experiences of many other Black women in Brazil. By gathering and analyzing these voices, this study highlights the need for a theoretical discussion on motherhood from a Black perspective, delving into crucial issues of race, gender, and class in maternal experience and within the Brazilian social context.Item type: Item , Colonialismo e Contra- colonização nos processos de saúde no Quilombo Extrema, Iaciara, Goiás(Universidade Federal de Goiás, 2024-06-28) Sacramento, Amanda Glayce Lopes do; Ratts, Alecsandro José Prudêncio; http://lattes.cnpq.br/0348844638764982; Ratts, Alecsandro José Prudêncio; http://lattes.cnpq.br/0348844638764982; Vieira, Suzane de Alencar; http://lattes.cnpq.br/5311157252579292; Silva, Ana Claudia Rodrigues da; http://lattes.cnpq.br/4177993008562757This research, carried out in the Quilombo Extrema, located in the municipality of Iaciara, Goiás, Brazil, discussed the processes of health, illness and cure, having as its starting point the trajectory of the matriarch Catarina Maria da Conceição. For this, we discuss the power relations in the production of knowledge about health; we investigate the perception of Extrema people on the subject; We identified ancestral care practices in the community and addressed structural and institutional racism as producers of suffering and illness. From the analysis it was possible to elect the State and the Catholic Church as the main promoters of weakening health practices in Extrema. The State operates by updating the processes of colonization in public policies, Necropolitics and institutionalized racism. The Catholic Church acts in the processes of catechizing and demonizing our religiosity. Contracolonization is conceived as the movement of opposition to such violence. Thus, the developed care technologies and the relationship of (dis)obedience established with the Catholic Church were presented.Item type: Item , Línguas indígenas de sinais: em busca de fontes de estudo(Universidade Federal de Goiás, 2024-12-04) Marinho, Ellen Sâmila dos Santos; Cruz, Aline da; http://lattes.cnpq.br/4931264307365579; Cruz, Aline da; http://lattes.cnpq.br/4931264307365579; Carneiro, Bruno Gonçalves; http://lattes.cnpq.br/2261247004986074; Christino, Beatriz Protti; http://lattes.cnpq.br/1139526431179026This research about “indigenous sign languages: in search of study” sources has as its main objective to verify to what extent Libras has been brought to indigenous communities and to what degree it overlaps with other indigenous sign languages in Brazil. For this purpose, this study aims to carry out a bibliographic review of the works already published on this topic, in order to understand the linguistic policies that are being implemented to enhance indigenous sign languages. For this, we rely on previous works that carried out mappings of the sign languages found in indigenous communities in general (Vilhalva, 2012) and specifically in the Indigenous Sign Language - LIS Terena (Sumaio, 2018) and Sign Language Kaa'por (Godoy, 2020). The survey seeks to answer the questions: In which indigenous communities is the Brazilian Sign Language (Libras) being used? Where does Libras compete with indigenous sign languages? We seek to map these uses in order to provide concrete elements for proposing language policies in this area. Keywords: Deaf Indians, Indigenous Sign Languages,Item type: Item , Aprimoramento de dados para SFT em português brasileiro: um estudo com modelos de língua e avaliação com LLM-as- Judge(Universidade Federal de Goiás, 2025-06-10) Rios, Walcy Santos Rezende; Galvão Filho, Arlindo Rodrigues; http://lattes.cnpq.br/7744765287200890; Galvão Filho, Arlindo Rodrigues; http://lattes.cnpq.br/7744765287200890; Oliveira , Sávio Salvarino Teles de; http://lattes.cnpq.br/1905829499839846; Soares, Telma Woerle de Lima; http://lattes.cnpq.br/6296363436468330The scarcity of high-quality resources for Brazilian Portuguese (pt-br) hinders the development of effective language models adapted to the language's specificities. This work investigates the impact of synthetic enhancement of conversational data, using Large Language Models (LLMs), on the Supervised Fine-Tuning (SFT) of models from the Qwen2.5 family (0.5B, 1.5B, 3B). Based on the SmolTalk dataset, two versions were generated for ptbr: one by direct translation and another with responses synthetically enhanced and rewritten by the LLM Gemini 2.0 Flash. The Qwen2.5 models were trained on both datasets and comparatively evaluated using standardized objective benchmarks for Portuguese (ENEM, HATEBR, BLUEX, ASSIN2-RTE) and through qualitative evaluation of open-ended text generation (Alpaca-Eval-BR), using Claude 3.5 Haiku as LLM-as-Judge based on relevance, precision, comprehensiveness, usefulness, and coherence criteria. The results demonstrate a significant superiority of the models trained with synthetic data in the qualitative LLM-as- Judge evaluation across all metrics. In this evaluation, the normalized average F1-Score significantly increased with synthetic data: the 1.5B model achieved 44.45 (vs 14.05 for the translated, a ~216% gain) and the 3B model reached 57.21 (vs 16.79 for the translated, a ~241% gain). In contrast, on the objective benchmarks, the positive impact of synthetic enhancement was less pronounced, being more consistent only in the 3B parameter version. It is concluded that the LLM-assisted synthetic data enhancement strategy is effective in significantly raising the quality and performance of conversational language models for Brazilian Portuguese, representing a valuable approach to mitigate the scarcity of dedicated resources and advance the development of NLP technologies better adapted to the national context.synthetic data enhancement strategy is effective in significantly raising the quality and performance of conversational language models for Brazilian Portuguese, representing a valuable approach to mitigate the scarcity of dedicated resources and advance the development of NLP technologies better adapted to the national context.