O sistema DSpace de repositório digital captura, armazena, indexa, preserva e distribui material de pesquisa digital.
Atualizado: 4 dias 9 horas atrás
qua, 02/12/2026 - 21:00
Título: Análise comparativa do perfil imunológico e bioquímico entre pacientes com Doença Pulmonar Obstrutiva Crônica e pacientes com Espirometria com Comprometimento da Relação Preservada (PRISm)
Autor(es): Braz, Leticia Helen Dias
Primeiro Orientador: Baccan, Gyselle Chrystina
Abstract: Chronic Obstructive Pulmonary Disease (COPD) and Preserved Ratio Impaired Spirometry (PRISm) are pulmonary conditions that share common factors. However, the pathophysiological mechanisms differentiating these entities remain poorly understood. This study aimed to compare the immunological and biochemical profiles of patients with COPD and PRISm and to analyze the correlation of these biomarkers with anthropometric parameters in each group. A cross-sectional analytical study was conducted involving 72 patients aged 50-80 years. Serum cytokines (IL-6, IL-8, IL-10, IL-12, TNF), biochemical markers (total cholesterol, HDL, LDL, triglycerides, glucose, glycated hemoglobin), and anthropometric measurements (waist circumference, triceps skinfold thickness, mid upper arm circumference) were assessed. No statistically significant differences were found between the groups regarding cytokine or biochemical levels. However, in COPD patients, abdominal circumference correlated positively with IL-6 levels (r = 0.565; p < 0.05), while triceps skinfold thickness showed a significant inverse correlation with IL-10 (r = – 0.427; p < 0.05). In PRISm patients, glucose levels were positively correlated with mid upper arm circumference (r = 0.574; p < 0.05) and body mass index (r = 0.567; p < 0.05). Although COPD and PRISm patients exhibited similar inflammatory and biochemical profiles, our analysis of correlations with body composition parameters showed distinct associations. The presents findings underscore the importance of individualized clinical management for each patient group.
Editora / Evento / Instituição: Universidade Federal da Bahia
Tipo: Dissertação
qui, 21/05/2026 - 21:00
Título: Anais do X Congresso Nacional de Arquivologia
Autor(es): Matos, Maria Teresa Navarro de Britto; Brandão, Gleise da Silva; Souza, Maíra Salles de; Feitoza, Rayan Aramis de Brito; Andrade, Leide Mota de
Editora / Evento / Instituição: Universidade Federal da Bahia
Tipo: Outros
qui, 09/04/2026 - 21:00
Título: Técnicas de modulação vetorial baseadas na distribuição da energia de modo comum para atenuação da corrente de fuga em inversores fotovoltaicos de três níveis
Autor(es): Mendonça, Luan Aleixo Canário
Primeiro Orientador: Bahia, Filipe Antônio da Costa
Abstract: Transformerless photovoltaic inverters are susceptible to leakage current, predominantly caused by the common-mode voltage. Modulation strategies typically focus on reducing the amplitude of this voltage, while its frequency spectrum is often neglected. Since the leakage current flows through an RLC loop formed by the output filter and the parasitic capacitance of the photovoltaic modules, the distribution of the common-mode voltage frequency spectrum relative to the circuit resonance frequency has a direct impact on its magnitude. Therefore, shifting the energy of its frequency components away from the resonance region constitutes an effective leakage current mitigation strategy. Based on this premise, this work introduces a modulation approach grounded in the spectral distribution of common-mode energy. To validate this approach, two modulation techniques are proposed. The first concentrates most of the energy around the switching frequency, making it more suitable when the resonance frequency is significantly higher. The second redistributes part of the energy to higher-order harmonics, making it more advantageous when the resonance frequency is close to or lower than the switching frequency. The proposed techniques operate over the entire modulation index range, enable DC-link capacitor voltage balancing, and exhibit low harmonic distortion and switching losses, as confirmed by both simulation and experimental results. In addition, the analysis of leakage current as a function of the modulation index reveals an optimal operating region in which the leakage current is minimized.
Editora / Evento / Instituição: Universidade Federal da Bahia
Tipo: Tese
dom, 05/04/2026 - 21:00
Título: Teoria de médio alcance para a redução de danos de pessoas que usam drogas: fundamentação conceitual para o cuidado de enfermagem na atenção psicossocial
Autor(es): Alves, Nemório Rodrigues
Primeiro Orientador: Felix, Nuno Damácio de Carvalho
Abstract: Drug use is a complex phenomenon with significant impacts on public health, aggravated by
prohibitionist policies that generate stigmatization and exclusion. In this context, Harm
Reduction emerges as an ethical-political paradigm in Psychosocial Care, guiding practices
centered on autonomy and rights. Nursing assumes a strategic role in this care, but conceptual
gaps regarding Harm Reduction indicate the need for greater theoretical depth to improve
practice. Aimed to analyze the concept of Harm Reduction and develop a middle-range theory
for Harm Reduction of people who use drugs. This is a theoretical study based on Walker and
Avant. A scoping review guided by the JBI was used, with systematic search, rigorous selection,
and independent analysis of studies. The conceptual analysis included the identification of
attributes, antecedents, consequences, and empirical referents. From the findings, a middlerange theory was constructed by induction, structured in purpose, propositions, diagramming,
and assumptions, focused on Harm Reduction of people who use drugs. The study followed
ethical principles, without involving human subjects. Results: The results showed that
scientific production on Harm Reduction in nursing is still incipient, heterogeneous, and
discontinuous, marked by conceptual disputes, formative weaknesses, and institutional
limitations in its incorporation into care practice. The conceptual analysis allowed the
identification of antecedents related to social vulnerability and hegemonic models of care,
attributes centered on the ethical-relational dimension and the centrality of the subject, and
consequences associated with the expansion of autonomy, improvement of well-being, and
continuity of care. It was possible to construct an expanded and operational definition of the
concept, highlighting its multidimensional character and its relevance to grounding nursing
practice. Finally, the construction of the Middle-Range Theory resulted in the systematization
of 20 propositions organized into five categories, a theoretical model, and a set of 10
assumptions that articulate metaparadigmatic and associated concepts, offering a structured
theoretical framework for the operationalization of Harm Reduction in nursing care. This thesis
demonstrated that Harm Reduction, although present in nursing practices, is still in the process
of theoretical and practical consolidation, marked by conceptual disputes and weaknesses in its
incorporation into services. The conceptual analysis allowed its refinement as an ethicalpolitical and relational paradigm of care, culminating in the construction of a Middle-Range
Theory capable of theoretically supporting nursing practice in this field. The proposed theory
has the potential to improve care, support training processes, and guide more ethical, equitable
practices centered on the needs of people who use drugs.
Editora / Evento / Instituição: UNIVERSIDADE FEDERAL DA BAHIA
Tipo: Tese
dom, 22/03/2026 - 21:00
Título: Mediação da informação e mediação da cultura no âmbito do Zumví Arquivo Afro Fotográfico
Autor(es): Araújo, Caroline dos Santos
Primeiro Orientador: Sousa, Ana Claudia Medeiros de
Abstract: This research addresses photography as a device whose aesthetic and visual capacity fosters the activation of identity feelings. It understands that its informational, cultural, and social agency aspects can be enhanced through the conscious mediating actions of the archivist and other information professionals, who are also identity-forming subjects. The general objective is to analyze how information mediation and cultural mediation occur within the ZUMVÍ Afro Photographic Archive and whether these processes of interference contribute to the strengthening of the identity of the Black population. To this end, the following specific objectives were outlined: to map the information mediation activities developed by the mediators of ZUMVÍ; to verify the cultural mediation activities carried out in the institution; and to identify mediating actions that have the potential to contribute to the constitution and strengthening of the identity of the Black population. This research is characterized as descriptive and as a case study, since it sought to discuss the information mediation and cultural mediation activities carried out within ZUMVÍ, from the perspective of the institution's professionals and its users. Data collection involved direct observation of the ZUMVÍ staff's work and interviews with this group; a questionnaire was applied to the institution's users. Data analysis was based on a qualitative approach. The results indicated that the staff working at ZUMVÍ have been developing information mediation activities, since the collection undergoes technical treatment, such as preservation, description, and storage practices, in addition to user service. Regarding cultural mediation practices, it was also indicated that staff propose and develop actions that foster users' engagement with representative symbols of Black culture, through photography and the content crystallized within them. Evidence was also identified of the training of leading agents through the offering of photography exhibitions, courses, workshops, lectures, and discussion groups focused on the themes of photography and Black identity. It was found that users feel represented in the collection and the content mediated there. It is concluded that the information mediation and cultural mediation activities carried out at ZUMVÍ are strongly intertwined, guided by the principles of representation and strengthening the identity of Black people.
Editora / Evento / Instituição: Universidade Federal da Bahia
Tipo: Dissertação
seg, 09/03/2026 - 21:00
Título: Fatores que afetam o uso da avaliação e a temporalidade do processo avaliativo
Autor(es): Gondim, Patrícia Santos Cardoso
Primeiro Orientador: Paixão, Roberto Brazileiro
Abstract: This research aimed to analyze how the factors influencing the use of evaluation differ according to temporality, that is, in the moments defined as before the evaluation, during the execution of the evaluation, and after its completion, based on the theoretical gap related to the temporal dimension in the evaluation process. Grounded in the interpretivist paradigm, the study conceptualized use as a socially constructed, processual, and contextual phenomenon. A conceptual framework articulating similarity and temporality was proposed and submitted to expert analysis through a two-round Delphi method. The participants, predominantly affiliated with Graduate Programs in Education whose courses hold high-quality ratings whitin CAPE' s evaluation system, examined the influence of these factors across the different stages. The results indicated that, at each stage, the factors relate to specific activities: in pre-evaluation, diagnosis, planning, and stakeholder engagement; in implementation, adaptation of planning and interaction between evaluator and stakeholders; and in post-evaluation, analysis, communication of results, and implementation of recommendations. The findings also showed that the factors are interrelated and significantly influence stakeholder engagement throughout the entire process. The framework was validated by the experts and contributes to understanding how factors interact with temporality to affect evaluation use. As limitations, the study highlights the low initial response rate and the reduced number of participants in the second Delphi round.
Editora / Evento / Instituição: Universidade Federal da Bahia
Tipo: Dissertação
qui, 05/03/2026 - 21:00
Título: Determinação sequencial de Cd, Cu, Mn e Pb utilizando análise de suspensão por FS-F AAS e avaliação da concentração de Hg em amostras de poeira urbana coletadas em Santo Amaro, Bahia, Brasil.
Autor(es): Francisco, Rafael Ribeiro
Primeiro Orientador: Araujo, Rennan Geovanny Oliveira
Abstract: This master’s dissertation addresses the development, analytical performance characteristics, and application of analytical methods for the determination of trace metals in urban dust samples, with a focus on the environmental assessment of the urban area of Santo Amaro, Bahia, Brazil. The work was divided into two complementary parts, involving distinct analytical approaches and environmental and human health risk applications. In the first part, an analytical method was developed and optimized for the sequential determination of Cd, Cu, Mn, and Pb in urban dust using sample preparation in the form of slurry and detection by flame atomic absorption spectrometry (F AAS) in fast sequential mode (FS). The study of sample mass indicated that the range between 10 and 75 mg provided the most suitable condition for the suspension preparation procedure, thus, a mass of 50 mg was selected, ensuring a good signal-to-noise ratio while maintaining analytical linearity. Fractional factorial design and Doehlert design were employed to optimize the experimental conditions, including the evaluation of the acidic medium, sonication time, and the use of a surfactant (Triton X-100). Experimental optimization indicated that the use of 1.25 mol L-1 HNO3, without surfactant addition, and a sonication time of 30 min resulted in the best analytical performance. The analytical method presented limits of quantification (LoQ) ranging from 3.03 to 81.6 mg kg-1. Accuracy was confirmed by the chemical analysis of certified reference materials (CRM) of fly ash (BCR 176R) and road dust (BCR 723), with agreement values ranging from 88.0 (± 0.6) to 91.8 (± 0.1)%. Precision was expressed as relative standard deviation (%RSD), with values below 5% (n = 3). The methodology enabled the analysis of urban dust with reduced reagent consumption and simplified sample preparation, supporting its applicability in environmental studies. In the second part, the direct determination of Hg was applied to 21 urban dust samples collected in the municipality of Santo Amaro, Bahia, using thermal decomposition and detection by atomic absorption spectrometry (AAS). The limits of detection (LoD) and quantification (LoQ) obtained were 0.08 ng g-1 and 0.25 ng g-1, respectively. Method accuracy was confirmed by the chemical analysis of a CRM for trace elements in multi-nutrient fertilizer (NIST 695), with an agreement of 106.3 (± 5.2)%. The %RSD value was below 5%. The analytical method allowed the quantification of Hg over a wide concentration range, revealing a heterogeneous spatial distribution, as well as good accuracy and precision. Hg concentrations ranged from 15.8 (± 0.3) ng g-1 to 1198 (± 29) ng g-1, with a mean of 54.9 (± 32.6) ng g-1 and a median of 46.1 ng g-1, after application of the Shapiro–Wilk (SW–W) normality test. The highest concentrations were observed in areas with greater urbanization, intense vehicular traffic, and proximity to industrial sites. Environmental interpretation was performed using the enrichment factor (EF), geoaccumulation index (Igeo), and ecological risk indices (Er), calculated based on a regional geochemical background specific to the state of Bahia. The results indicated significant enrichment and elevated ecological risk at localized points, with a very high potential ecological risk for the study area, considering the specific sampling period and the prevailing climatic conditions at that time. The sustainability of the analytical methods for the sequential determination of Cd, Cu, Mn, and Pb using suspension preparation and for the direct determination of Hg was evaluated using the AGREE (Analytical Greenness Metric) index, yielding scores of 0.78 and 0.86, respectively, indicating high adherence to the principles of Green Analytical Chemistry. Overall, the results demonstrate that the applied analytical methods are feasible, reliable, and suitable for the environmental monitoring of trace metals in urban dust.
Editora / Evento / Instituição: Universidade Federal da Bahia
Tipo: Dissertação
dom, 22/02/2026 - 21:00
Título: Intervenção social colaborativa: educação, trabalhabilidade e empreendedorismo para o desenvolvimento sustentável da comunidade de Ilha Amarela, Salvador Bahia. ustentável da Comunidade de Ilha Amarela, Salvador - Bahia
Autor(es): Santos, Ivone da Silva Machado
Primeiro Orientador: Marback Neto, Guilherme
Abstract: This dissertation analyzes how collaborative practices in the fields of education,
employability, and entrepreneurship can contribute to upward social mobility and
sustainable development in vulnerable communities, using the community of Ilha
Amarela, in Salvador, Bahia, as a case study. Grounded in the theoretical frameworks
of social management, collaborative social intervention, territorial development, and
the solidarity economy, the study adopts a qualitative and applied research approach.
The methodological procedures include documentary research, field observation, and
dialogue circles with social actors from the territory. The results indicate that, despite
the existence of relevant initiatives promoted by social organizations, companies, and
public authorities, actions remain weakly articulated, with limited intersectoral
integration and insufficient consolidation of collaborative practices. The findings
demonstrate that collaborative practices based on co-responsibility, participatory
dialogue, the appreciation of local knowledge, and the integration of education,
employability, and entrepreneurship strengthen community protagonism and enhance
individual and collective capacities, creating more favorable conditions for upward
social mobility. As a research product, the Sustainable Community Development
Program (SCDP) “Raízes que Crescem” was developed as a Social Management and
Territorial Development Technology, with potential for replicability and supported by its
own digital platform. This study contributes to academic and practical debates on
public policies and social management in vulnerable territories, indicating pathways for
more integrated, participatory, and sustainable interventions.
Editora / Evento / Instituição: UNIVERSIDADE FEDERAL DA BAHIA
Tipo: Dissertação