Repositório UFSCar

O Repositório Institucional da UFSCar (RI UFSCar) é um sistema de informação que visa armazenar, preservar, organizar e disseminar amplamente a produção intelectual dos diversos setores e segmentos da comunidade da UFSCar, provendo o acesso aberto à informação produzida na instituição e registrada como científica, tecnológica, didática, artístico-cultural e técnico-administrativa.

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Attractors for a class of autonomous wave equations of the Klein-Gordon-Zakharov type
(Universidade Federal de São Carlos, 2026-07-17) Accarini, Luíza Gomes; Bonotto, Everaldo de Mello; Rosado, José Antonio Langa; http://lattes.cnpq.br/2183693074268993; https://orcid.org/0000-0002-8765-0764; Nascimento, Marcelo José Dias; http://lattes.cnpq.br/7133572787875912; http://lattes.cnpq.br/0703792611191481; https://orcid.org/0000-0002-2004-7274; Nascimento, Marcelo José Dias; Belluzi, Maykel Boldrin; Fu, Ma To; Moreira, Estefani Moraes; Bezerra, Flank David Morais; http://lattes.cnpq.br/7133572787875912; http://lattes.cnpq.br/4072119689022816; http://lattes.cnpq.br/5313392830234233; http://lattes.cnpq.br/6532566248140862; http://lattes.cnpq.br/3997742141912443
This work investigates the long-time dynamics of an autonomous coupled Klein-Gordon-Zakharov type wave system defined on a bounded smooth domain in Rn, for n ≥ 3. We establish global well-posedness of solutions in a suitable phase space by employing semigroup theory and we proceed to derive the dissipative properties required in order to construct the associated dynamical system. The asymptotic behavior is then analyzed in detail. We prove the existence of a global attractor, we study some properties for it, such as regularity and upper semicontinuity, and we show that it possesses finite fractal dimension. We also construct exponential attractors for the semigroup generated by the wave system through two different approaches.
A construção da Política Estadual de Assistência Farmacêutica no Rio Grande do Sul: uma análise a partir da sistematização de experiências
(Universidade Federal de São Carlos, 2025-12-12) Guimarães, Adernanda De Rocco; Gossenheimer, Agnes Nogueira; http://lattes.cnpq.br/7121458935229774; https://orcid.org/0000-0002-7424-8426; Nordi, Aline Barreto de Almeida; http://lattes.cnpq.br/9965335072268661; https://orcid.org/0000-0003-0262-9796; http://lattes.cnpq.br/4252495367417490; https://orcid.org/0000-0003-3928-7988; Nordi, Aline Barreto de Almeida; Barbieri Feliciano, Adriana; http://lattes.cnpq.br/9965335072268661; http://lattes.cnpq.br/9398810638733882; https://orcid.org/0000-0003-0262-9796; https://orcid.org/0000-0003-2524-9876
The National Pharmaceutical Assistance Policy guides public policies and constitutes a strategic reference for the organization of Pharmaceutical Assistance within the Brazilian Unified Health System. In Rio Grande do Sul, this framework supported the development of the State Pharmaceutical Assistance Policy, established in 2022 through a collective construction process. This research analyzed the development of the policy considering its historical, political, and institutional context and the conditions and strategies that enabled its consolidation. This qualitative and participatory study was based on the Systematization of Experiences proposed by Oscar Jara Holliday in 2006. It combined document analysis and narrative interviews with managers, workers, and users. The findings revealed a policy developed democratically during the pandemic, supported by listening, shared responsibility, and a territorial approach to care. The narratives expressed a commitment to equity, comprehensiveness, and social participation and recognized the state policy as a milestone for Pharmaceutical Assistance in Rio Grande do Sul. However, limited interprofessional participation and the small number of participants in the public consultation restricted the diversity of perspectives and the breadth of dialogue. The process also revealed historical tensions within the Brazilian Unified Health System and reinforced the importance of cooperative governance. The experience repositions Pharmaceutical Assistance as a transversal component of health care, articulated with the Rational Use of Medicines and Health Care Networks. By recovering trajectories, decisions, and lessons learned, the research contributes to institutional memory and strengthens debates on regionalization, pharmaceutical care, and participatory methodologies. It also demonstrates the potential of the Systematization of Experiences as an analytical and formative tool. The research suggests the development of support materials, monitoring instruments, methodological guides, and participatory workshops to support the implementation of the state policy guidelines. These initiatives reaffirm that public policies are dynamic processes that are continuously updated through knowledge production, participation, and cooperative governance.
Onde o sonho se rompe, cultivar a vida: uma análise documental da política de saúde mental da Universidade Federal de São Carlos
(Universidade Federal de São Carlos, 2026-07-08) Lopes, Lueny Helena; Ferigato, Sabrina Helena; http://lattes.cnpq.br/3248396158325409; https://orcid.org/0000-0001-7567-7225; http://lattes.cnpq.br/9116661245136164; https://orcid.org/0009-0005-2262-3457; Marcolino, Tais Quevedo; http://lattes.cnpq.br/7197838515800679; https://orcid.org/0000-0002-9694-5118
This research emerges from the encounter between a trajectory and a territory: that of the public university and that of the urgencies of the life that inhabits it. It takes as its field of attention the Mental Health Policy of the Federal University of São Carlos (UFSCar), established in 2023, understanding it as a living body in which meanings of care, suffering, and dreams intertwine. Based on a qualitative and situated documentary analysis - which articulates content analysis, discourse analysis, and affective cartography, from the perspective of occupational therapy - the dissertation proposes an engaged reading of the policy as a discursive gesture, an institutional device, and an expression of collective desire. More than describing the normative text, the research traces its flows, tensions, and silences, recognizing in it both the strengths of a university that seeks to foster care and the fissures of a structure still marked by productivist logics and historical exclusions. The research is guided by the following question: how does the UFSCar Mental Health Policy enunciate, regulate and tension meanings of care and suffering, and what symbolic and political effects emerge from these enunciations for the university territory? The results were organized through the analysis of each of the structuring axes of the UFSCar Mental Health Policy. The primary corpus was complemented by exploratory observation of the institutional website and the Instagram profile of the Mental Health Coordination, mobilized as communicational context of the policy. Each axis was read through four movements: its modes of enunciating care; the subjects convened and the responsibilities assigned; its tensions, silences, and displacements; and the openings it affords to occupational therapy. The cross-sectional analysis of the axes pointed to four categories: territory and belonging; production of suffering and care; institutional listening and silencing; and care as a reinvention of life. The work affirms care as a political and poetic act of reinventing life, and understands university mental health as a contested field in which the challenge is to cultivate spaces that sustain belonging, diversity, and creation. In short, the dissertation is a manifesto of attention and resistance, arguing that where the dream is broken, it is possible to cultivate life.
Compensação de deriva térmica de encoder magnético analógico via software aplicada a compressor hermético para análise de diagrama P-V
(Universidade Federal de São Carlos, 2026-07-17) Valvassore, Felipe Andriotti; Araujo, Luis Antonio Oliveira; http://lattes.cnpq.br/3639906702064630; https://orcid.org/0000-0002-1117-0094
The construction of experimental PV diagrams is fundamental for the reliability analysis of hermetic compressors, since it enables the quantification of the work required by the process the identification of heat transfer losses, and the diagnosis of inefficiencies in the suction and discharge valves. Proper instrumentation of this system requires accurate measurements of the cylinder pressure and the shaft angular position. In this context, magnetic encoders are widely used due to their high resolution and contactless operation. Although magnetic encoders are subject to different sources of error, such as misalignment, electrical noise, and nonlinearities, as well as limitations in repeatability and reproducibility, this work focuses exclusively on thermal drift, as it is an error that can become predominant in applications subjected to large temperature variations, compromising the thermodynamic fidelity of the experimental P V diagrams. These errors arise from temperature-dependent variations in the sensor response, including changes in the signal amplitude and offset, which distort the calculated angle. This work presents a semi-empirical compensation strategy to mitigate the effects of thermal drift in analog magnetic encoders via software. The approach is based on the generation of reference curves under controlled temperature conditions, using a bivariate polynomial regression model of the shaft angle and temperature. The results demonstrate how this thermal phenomenon significantly affects the encoder measurements, particularly at elevated temperatures, leading to severe distortions in the PV diagrams. The application of the proposed method proved to be essential for measurement reliability, since thermal drift can shift the power calculation by approximately 4.25%. This level of error is critical, as it compromises the accuracy of loss segregation and energy efficiency analyses.
Análise do movimento vibratório de um automóvel: modelagem e validação de modelo
(Universidade Federal de São Carlos, 2024-11-18) Lupino, Derik Allison Lima da Silva; Franco, Vitor Ramos; http://lattes.cnpq.br/4590258470207467
Studies in the area of vehicle dynamics have been carried out since the beginning of the automobile industry, but problems of discomfort for passengers in a car caused by vibrations from oscillations in the road are common in many practical applications. With this in mind, suspensions have been sought with the function of isolating the structure and occupants of the vehicle from these vibrations caused by irregularities in the road, so the aim of the studies was to define a mathematical model, analyze and validate a car model. The tests were carried out using a signal acquisition board and an accelerometer, to which an input force was applied manually. Using MatLab, parameters such as spring stiffness and damping coefficient were obtained to compare the virtual physical model with the real physical model. By analyzing and validating this model, it was noticed that there were some discrepancies due to experimental errors, mainly in the measurement of spring displacements. This meant that the model had to be adjusted and the dynamic parameters recalculated to bring it closer to the real thing. Finally, it was realized that the real model is damped, and that performing the manual test brings some problems such as the lack of an input parameter, but with the adjusted data, a good approximation was obtained, thus concluding that the mathematical model is valid, allowing the efficient execution of suspension projects, increasing the performance of the vehicles, improving stability and driver comfort, resulting in a safer and more enjoyable driving experience.