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Religião, educação e laicidade: a atuação adventista através do Projeto Adote um Leitor

Thu, 29 Jan 2026 00:00:00 GMT

Título: Religião, educação e laicidade: a atuação adventista através do Projeto Adote um Leitor Autor(es): Vieira, Vitelmo da Silva Abstract: This study analyzed the actions of the Seventh-day Adventist Church through the Adote um Leitor Project, implemented at José Antônio dos Santos Municipal School, in the city of Lagarto, state of Sergipe (Brazil), during the 2021–2022 period, analyzing its educational and social outcomes and its implications for the principle of secularity. The general objective was to examine how the Church’s involvement through this project engages with, impacts, or potentially tensions the principle of secularity within the public school context. Methodologically, this is a qualitative study of an interpretative-comprehensive nature, grounded in a hermeneutical approach as articulated by Hans-Georg Gadamer and Paul Ricoeur. The corpus consisted of preexisting materials related to the project, including institutional documents, printed pedagogical materials, audiovisual records, and testimonies from mothers of participating children, school representatives, and sponsors. The theoretical framework draws on the concept of secularization as developed by Peter Berger, as well as on discussions of secularity based on the contributions of Marília Domingos and Sérgio Junqueira and Marcos Vinícius Reis. The findings indicated that the Adote um Leitor Project was well received by the school community and positively perceived by society as an educational support initiative, promoting significant improvements in reading development, socialization, and the expansion of personal expectations and future aspirations among the children benefited, without evidence of explicit proselytism. However, the study also revealed that the presence of a religious denomination within a public school may contribute to the naturalization of this institutional presence and generate tensions with the principle of state secularity, thereby requiring ongoing and careful vigilance.

Habitação de interesse social na engenharia civil: análise curricular em instituições federais de ensino em Sergipe

Mon, 27 Apr 2026 00:00:00 GMT

Título: Habitação de interesse social na engenharia civil: análise curricular em instituições federais de ensino em Sergipe Autor(es): Melo, Lúzula dos Reis Abstract: The problem of producing Social Housing (HIS) and access to it by low-income populations has historically been a field of conflicting interests in Brazil. However, it is through the consolidation of public housing policies that the Brazilian government seeks to address sociospatial inequalities by linking housing, infrastructure, and urban integration. Despite legal attempts, such as the enactment of Law No. 11,888/2008, which guarantees free public technical assistance for HIS projects and works, progress in the application of this law has been limited by institutional obstacles, lack of regulation, and a shortage of qualified professionals. These factors have hindered the effective realization of the rights guaranteed by this legislation, contributing to the persistence of a scenario marked by a housing deficit, especially of a qualitative nature, and the continuation of self-construction practices in precarious conditions, with direct impacts on the safety and quality of life of low-income populations. Given this reality, the question arises: how are future Civil Engineering professionals being trained to work with low-income populations, especially in Sergipe? It is assumed that the lack of priority given to the topic of Social Housing in Civil Engineering courses in Sergipe compromises the training of professionals to work critically and attentively with low-income populations. This research aims to analyze the official and interpreted curricula of undergraduate Civil Engineering courses offered by Federal Higher Education Institutions in the state of Sergipe regarding their approach to the topic of Social Housing. The analyses are based on Critical Curriculum Theory, from the perspective of José Gimeno Sacristán, and were carried out in two stages: (i) document analysis of the official and interpreted curricula of the courses offered by the Federal University of Sergipe (UFS) and the Federal Institute of Education, Science and Technology of Sergipe (IFS); (ii) application of a semi-structured questionnaire. The results indicate that the topic of Social Housing and Technical Assistance for Social Housing is addressed indirectly, in a fragmented and poorly systematized way in Civil Engineering training at UFS and IFS. No specific curricular components dedicated to the topic were identified, which highlights a training centered on traditional technical skills. Although professors recognize the social relevance of Social Housing, factors such as curricular and structural limitations hinder the more consistent inclusion of the topic in professional training.

Crescimento e caracterização de monocristais das famílias RCuGa3 (R = Ce, Pr, Nd, Gd) e RNiIn4 (R = La, Ce, Pr, Nd) por meio do método de fluxo metálico: estudos estruturais, magnéticos e do campo elétrico cristalino

Wed, 27 Aug 2025 00:00:00 GMT

Título: Crescimento e caracterização de monocristais das famílias RCuGa3 (R = Ce, Pr, Nd, Gd) e RNiIn4 (R = La, Ce, Pr, Nd) por meio do método de fluxo metálico: estudos estruturais, magnéticos e do campo elétrico cristalino Autor(es): Possidonio, Daykson Neves Abstract: This work presents a systematic experimental study on the synthesis, structural characterization, and investigation of the magnetic properties of single crystals belonging to two families of rare-earth-based intermetallic compounds, RCuGa3 (R = Ce, Pr, Nd, Gd) and RNiIn4 (R = La, Ce, Pr, Nd). The single crystals were grown using the high-flux method, employing gallium (Ga) and indium (In) as solvents for the RCuGa3 and RNiIn4 series, respectively, enabling the growth of samples with high crystalline quality. Structural characterization was performed by X-ray diffraction (XRD), with crystallographic parameters refined using the Rietveld method implemented in the DBWS software, revealing that the RCuGa3 compounds crystallize in a tetragonal structure with space group I4/mmm, whereas the RNiIn4 compounds adopt an orthorhombic YNiAl4-type structure belonging to the Cmcm space group. Complementary scanning electron microscopy (SEM) analyses, particularly for PrNiIn4, confirmed the chemical homogeneity and high structural quality of the crystals, in good agreement with the XRD results. The magnetic properties were investigated through temperature-dependent magnetic susceptibility measurements for both families, and through specific heat (Cp) measurements for the RNiIn4 series, revealing antiferromagnetic behavior at low temperatures, with magnetic transitions characterized by N´eel temperatures (TN ) ranging from 2.2 K to 9.3 K, namely TN ≈ 3 K (Ce), 4.4 K (Pr), 2.2 K (Nd), and 9.3 K (Gd) for the RCuGa3 series, and 2.8 K < TN < 4.2 K for the RNiIn4 series. The analysis of the inverse magnetic susceptibility in the paramagnetic regime, based on the Curie-Weiss model, allowed the determination of the Curie-Weiss temperature (θCW), the experimental effective magnetic moment (µexp), and the magnetic frustration factor (f), revealing a pronounced magnetic anisotropy in the RNiIn4 series, expressed by ratios χeasy/χhard > 1, which is attributed to the significant influence of crystalline electric field (CEF) effects. Similar CEF-related effects were also identified in the RCuGa3 series, particularly for the Ce- and Pr-based compounds, influencing both the values of TN and the deviations observed from the scaling behavior predicted by the De Gennes rule. The specific heat measurements corroborated the magnetically determined transition temperatures and further reinforced the central role of CEF effects in defining the magnetic ground state of these systems, providing, overall, a comprehensive comparative analysis of the correlations between crystal structure, electronic interactions, and magnetic properties in rare-earth intermetallic compounds.

Comportamento dos fônons e magnetismo gerado por vacâncias em nanocristais de CeO2− dopado com Mn

Mon, 02 Feb 2026 00:00:00 GMT

Título: Comportamento dos fônons e magnetismo gerado por vacâncias em nanocristais de CeO2− dopado com Mn Autor(es): Assis, Maria Suêd Macêdo Abstract: We investigated the influence of doping CeO2 nanocrystals with Mn through structural, spectroscopic, and magnetic analyses. The materials were synthesized by the sol-gel method and characterized by X-ray diffraction, X-ray absorption spectroscopy (XANES), Raman spectroscopy, and magnetic measurements. The results of Rietveld refinement together with the Raman spectrum confirm the formation of a single phase of CeO2 with a fluorite-type cubic structure. These results show that Mn insertion modifies the lattice parameters, crystallite size, and microdeformation in a non-monotonic manner, revealing a balance between local disorder and lattice relaxation induced by phonons and vacancy formation. The XANES results reveal mixed valence of Mn ions as Mn3+ /Mn2+ , resulting in charge compensation through partial reduction of Ce4+ to Ce3+ . The ZFC/FC curves suggest an anisotropic distribution originating from Mn–vacancy and show blocked superparamagnetic behavior at low temperatures. The study identified an antiferromagnetic regime derived from Dzyaloshinskii-Moriya (DM) influenced by oxygen vacancies. These results present a framework that quantifies the defect chemistry and magnetic behavior in (Ce1−xMnxO2−, 0 ≤ x ≤ 0.09) nanocrystals, highlighting the role of oxygen vacancies and doping-induced structural disorder.