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Alternância pronominal e concordância nominal e verbal na língua bissau-guineense
(Universidade Federal de São Carlos, 2024-07-25) Nunes da Fonseca, Janifer; Araújo Vale, Oto; https://lattes.cnpq.br/2277403284693571; Rubio, Cássio Florêncio; https://lattes.cnpq.br/8357993415342241; https://lattes.cnpq.br/1067998439790758
Es tarbadju tene suma obidjetivu di diskribi aspectus di alternansia pronominal, di konkordansia nominal di sintagma nominal-sudjetu i di paradigma di konkordânsia verbal na lingu bissau-guineense (ku ta tchomadu tambi di kryol, kryol di Guiné-Bissau, guineense ô crioulo guineense). Na basi di es obidjetivu garandi, tarbadju tene quatru obidjetivus pikinus: ntundi mindjor funson ku strutura di pronomis pessoais na funson di sudjetu na lingu bissau-guineense; analiza di pontu di vista qualitativa/quantitativa e descritiva /exploratória, prosesus di variason ku na relasionadus ku quadru pronominal na lingu bissau-guineense; diskribi strutura ku funson di verbu dentru di okorensias; splica formas di paradigma verbal di diskursu na singular ku plural na lingu bissau-guineense. Studu fundamentadu, na pontu di vista diskritivu, na tarbadju di es piskisadores Perini (2003); Couto e Embaló (2010); Intumbo (2007), Scantamburlo (1999, 2021); Tavares (2021) e Castilho (2010), i ku utrus djintis, i na pontu di vista di metudu di sociolinguística, no tene Labov (2008) e Mollica (2003). Di pontu di vista metodologiku, a abordagem i qualitativa/quantitativa, ku aplikason di formularios ben struturadus, ki buska informasons di aspectus relasionadus ku tematika propostadu na objetivus, i konta ku partipason di 63 estudantis guineenses, ku mora na Brasil i na Guiné-Bissau. Pa kabanta es tarbadju no sai ki es resultadus: i) lingu bissau-guineense tene variason na tudu djintis di discursu, na kil ku ta rifiri forma ku no ta pui pronomis; ii) alternânsias pronominais ta da entri manera ke ta mprega es dus formas clíticas e não-clíticas; iii) i ka tene pusiblidadi di paga es dus forma pronominal, pabia lingu bissau-guineense ka tene marca di koncordansia na verbus suma ki ta akontisi na utrus lingu o varidadis, i asin suma na portuguis padron, i na lingu bissau-guineense es strutura ka ta varia, son SN-sudjetu ku ta marka numeru i djintis; iv) paradigma di kondjugason di verbus na lingu bissau-guineense i ta parsi ku utrus lingu ô variedadis, suma inglis padron i ku variedadi di purtuguis pupular, na kil ku ta fala di auzensia di markas di konkordansia na formas di verbus. Nô conclui cuma: i tene variason na kil cu ta rifiri pronomis-sujeitus i ka tene tan marcas di konkordansia verbal suma ki ta akontisi na lingu purtuguis, distakandu variason na uzu di pronomis i auzensia di marcas di konkordansia verbal, aspectus ki ta evidensia influensia di prinsipiu di economia linguistica na strutura des lingu. Analizi conta cuma, plural ta marcadu di forma ki ka redundanti, i ta limita nucliu di sintagma nominal, i ta parsi cu di inglis. I ka tene tan norma-padron i ka tene tan artigu.
Exploração da luminescência de filmes finos de ZnO dopados com érbio e európio
(Universidade Federal de São Carlos, 2024-07-25) Santos, Camila Ianhez Pereira dos; Rodrigues, Ariano De Giovanni; https://lattes.cnpq.br/4881530489438346; Godoy, Marcio Peron Franco de; https://lattes.cnpq.br/2609654784637427; https://lattes.cnpq.br/5254661642325605; https://orcid.org/0000-0002-8803-0882
Trivalent rare earth ions (RE³⁺) possess unique electronic configurations and numerous energy levels, resulting in fascinating optical properties across the visible region. These characteristics open various application perspectives in optoelectronic devices, besides encouraging the development of luminescent materials with REs. In this work, pure and doped (2%) zinc oxide (ZnO) thin films with the REs erbium (Er³⁺) or europium (Eu³⁺) were deposited by Spray Pyrolysis. The films were synthesized under two different conditions, resulting in materials with lower crystallinity (SP group) and higher crystallinity (SO group). The luminescence of the REs was also investigated by varying temperature conditions (25 K - 265 K) and hydrostatic pressure (up to 13.5 GPa). X-Ray Diffraction (XRD) indicated that all materials presented the hexagonal wurtzite phase of ZnO. The pure and doped ZnO films from the SO group exhibited crystallites up to 4x larger than those of the SP group, which also showed a more opaque and rougher surface. UV-Vis spectroscopy measurements showed a shift of ~ 4% in the optical gap energy to lower values in the SP group films. Photoluminescence (PL) spectroscopy revealed an increase of over 200x in the intensity of Eu³⁺ optical emissions when doped in a less crystalline structure. The presence of Stark emission peaks in the Er³⁺-doped ZnO film from the SP group highlighted the significant influence of the crystal field. PL measurements with increasing temperature showed a corresponding increase in Eu³⁺ luminescence intensity, likely due to energy transfer between this ion and ZnO energy levels, caused by intrinsic defects. Additionally, the PL investigation under pressure revealed a decrease in the intensity of all Eu³⁺ optical emissions at 10 GPa. This reduction can be attributed to the consolidation of a phase mixture with hexagonal and cubic structures in the material, as observed in the XRD measurements at the same pressure.
Diagnóstico preliminar sobre as bibliotecas municipais de São Carlos no contexto dos objetivos do desenvolvimento sustentável da Agenda 2030
(Universidade Federal de São Carlos, 2024-07-25) Marcomini, Kelly Cristina da Silva; Gracioso, Luciana de Souza; https://lattes.cnpq.br/4898201916360294; https://orcid.org/0000-0002-6320-4946; https://lattes.cnpq.br/4502391092205826; https://orcid.org/0009-0006-7241-1994
United Nations (UN) established the 2030 Agenda, a global action plan aimed at promoting sustainable economic development and eradicating poverty, with 17 Sustainable Development Goals (SDGs) to be achieved by the end of 2030. In this context, it is argued that public libraries play a strategic role in fostering the achievement of these goals. Based on this premise, this research aims to develop a preliminary diagnosis of how the municipal libraries of São Carlos align with the 2030 Agenda. To achieve this, the following specific objectives were outlined: to identify and describe the actions carried out by the municipal libraries of São Carlos that align with the SDGs of the 2030 Agenda. This is an exploratory study that includes a literature review on the relationship between libraries and the 2030 Agenda, as well as a historical analysis of the city of São Carlos, particularly regarding its educational trajectory and the training of librarians. Data collection was guided by direct observation of the social media platforms of São Carlos' municipal libraries, in order to support the development of the preliminary diagnosis. The results indicate that the city's municipal libraries went through an institutionalization process, culminating in the formation of the São Carlos Integrated Library System (SIBI-São Carlos). This process, which intensified until 2012, promoted relevant actions that can be linked to the potential fulfillment of the SDGs of the 2030 Agenda. However, it is observed that SIBI-São Carlos, as a network of libraries, requires continuous support to stimulate and energize the promotion of social awareness campaigns on the 2030 Agenda.
Modulation of semiconductors with transition metals: morphological, optical, and electronic properties
(Universidade Federal de São Carlos, 2024-07-25) Patrocinio, Katiana Lima do; Silva, Elson Longo da; https://lattes.cnpq.br/9848311210578810; https://lattes.cnpq.br/6895713868339732
Research on semiconductors has been of great interest due to their numerous applications. These materials are versatile, and doping, which introduces impurities into the crystal structure, is a common strategy that can enhance their properties. This process directly influences the electronic, optical, and morphological properties, allowing for adjustments to optimize the effectiveness of semiconductors in specific applications.This process directly influences the electronic, optical, and morphological properties of semiconductors, enabling adjustments to optimize their effectiveness for specific applications. Within this context, this study introduces two matrices: silver tungstate (α-Ag2WO4 or AW) and zinc germanate (Zn2GeO4 or ZGO), each dedicated to investigating the influence of doping with transition metals. For AW doped with vanadium at different concentrations (x = 0.0; 0.01; 0.02; and 0.04 mol%), it was demonstrated as a highly efficient catalyst for the oxidation of sulfides to sulfones under mild conditions, exhibiting high yields and selectivity. Sequestration experiments identified the direct involvement of electron-hole (e-/h+) pairs, hydroxyl radical (⦁OH), and singlet oxygen (1O2) in the oxidation process. Electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) analyses confirmed the presence of V4+ cations in the doped samples. Theoretical results suggested that the enhanced catalytic activity of vanadium-doped samples is associated with the predominant presence of the (100) surface morphology, indicating potential applications in sulfide oxidation reactions in the absence of light. For ZGO doped with nickel at different concentrations (x = 0, 0.01, and 0.16 mol%), doping was utilized to tailor its structural and electronic properties towards creating efficient blue pigments for ceramics. Density functional theory (DFT) calculations revealed that the 3d orbitals of Ni2+ generate new energy levels, altering the local electronic structure and resulting in electron transfer that produces the blue color. Analyses confirmed that this modification is responsible for the blue hue, while also highlighting the low toxicity and excellent chemical and thermal durability of the pigments. This work establishes a robust foundation for the design of adjustable and high-performance ceramic pigments. Ultimately, these materials demonstrate the potential of scientific research to drive significant innovations and improvements in real-world technologies and products.