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Atividade física no trabalho, lazer e sono em profissionais da saúde em ambiente hospitalar
(Universidade Federal de São Carlos, 2024-07-23)
Cardoso, Beatriz Medeiros
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Triches, Maria Isabel
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https://lattes.cnpq.br/9585150764624635
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https://orcid.org/0000-0002-7606-8218
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Sato, Tatiana de Oliveira
Introduction: Healthcare professionals have had their work hours intensified with the arrival of the COVID-19 pandemic. It is important to investigate, through objective measures, occupational physical activity (OPA) and leisure-time physical activity (LTPA), as well as sleep characteristics. Objective: To describe and correlate physical activity at work and during leisure time with sleep quality and duration and musculoskeletal symptoms in healthcare professionals working in a hospital environment, in the context of the COVID-19 pandemic. Methods: Cross-sectional study with 17 healthcare professionals from hospitals in the city of São Carlos (SP). Data collection was performed using an electronic form, containing a sociodemographic questionnaire, the Nordic Musculoskeletal Symptoms Questionnaire (QNSO) and the Pittsburgh Sleep Quality Index (PSQI-Br). In addition, triaxial accelerometers (Axivity AX3) were used to monitor physical activity. The information was analyzed descriptively and through point-biserial correlation analysis. Results: Most participants had low back pain and poor sleep quality. The predominant postures at work and during leisure time were, respectively, sitting (50% and 41%) and standing (30% and 24%). The number of steps was higher during work. There was a negative correlation between light physical activity on non-work days and symptoms in the lumbar spine (r=0.69), feet (r=0.58) and shoulder (r=0.62); and between moderate to vigorous physical activity during leisure time and knee pain (r=-0.68). Conclusion: The practice of physical activity outside the work environment was associated with musculoskeletal symptoms in health professionals. Promoting the practice of physical activity can help in the prevention and control of musculoskeletal symptoms, especially in periods such as the COVID-19 pandemic.
Crianças autistas com e sem ecoico generalizado: um estudo exploratório sobre o ensino do comportamento de ouvinte
(Universidade Federal de São Carlos, 2024-07-23)
Talarico, Mariana Valente Teixeira da Silva
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Goyos, Antônio Celso de Noronha
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https://lattes.cnpq.br/3407008711535651
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https://orcid.org/0000-0002-6150-1074
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https://lattes.cnpq.br/9804047279859169
Several studies have been developed to install, increase and improve verbal behavior, especially in people with Autism Spectrum Disorder. Recent research suggests that in some cases, the acquisition of a verbal operant can give rise to others, without specific training. This focus on emergent verbal behaviors advocates that a response acquired under the control of the conditions of one verbal operant is transferred to the conditions of another, without direct instruction. The objective of the present study was to analyze the effects of listener training on the tact repertoire of autistic children with and without generalized echoic. Nine children participated in the study and were divided into two groups: group 1 - participants who presented a generalized echoic repertoire (P1, P2, P3, P4) and group 2 - participants who did not present a generalized echoic repertoire (P5, P6, P7, P8, P9). The procedures followed the following steps: 1- assessment of sitting behavior; 2- assessment of visual contact under instructional control; 3- behavioral assessment of initial repertoire; 4- assessment of generalized echoic; 5- listener and speaker baseline; 6-generalized echoic and motor imitation probe; 7- listener training; 8- speaker test (P1, P2, P3, P4, P5); 9- additional training (P6, P7, P8); 10- simple simultaneous discrimination (P6); 11- generalized echoic and motor imitation probe (P6, P7, P8, P9); 12- behavioral reassessment. As it is an exploratory study, it must be considered inconclusive, however it allows the establishment of important correlations between the data collected. All participants who presented the generalized echoic repertoire at baseline learned the auditory-visual (listener) discrimination of abstract stimuli Omega and Pi, with a relatively reduced number of teaching sessions (between four and fourteen sessions), and presented the rapidly emerging naming/tact relations (between three and eight sessions). On the other hand, participants who did not present a generalized echoic repertoire at baseline were unable to learn the listener and speaker repertoires of the same stimuli, although significant numbers of teaching sessions were carried out, as well as the insertion of alternative teaching and/or adjustments to teaching procedures. These results, in general, corroborate the proposal of Goyos (2018), who considers the generalized echoic repertoire as a prerequisite for more complex verbal/vocal skills and for socialization.
Respirar como direito de existir: epistemologia do armário e trajetórias de vida de mulheres lésbicas
(Universidade Federal de São Carlos, 2024-07-23)
Moraes, Simone Silveira
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Mendonça, Viviane Melo de
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https://lattes.cnpq.br/4827331651090223
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https://orcid.org/0000-0002-1368-1883
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https://lattes.cnpq.br/8511812158414809
The research aimed to analyze the life trajectories of lesbian women, focusing on the experiences of refuges and coming out of the closet in the context of their relationships with other women in the family and how these interactions can affect mental health, especially with regard to anxiety. Using a qualitative approach and semi-structured interviews, three women who self-identify as lesbians, living in the interior of the State of São Paulo, aged between 35 and 48, were interviewed. The speeches of these women were analyzed based on the theoretical-methodological discursive practices of social psychology. The results revealed that lesbian women face high levels of anxiety due to the heteronormative prejudice still prevalent in society. Another aspect identified was that the impact of social class and race on the experiences of these women, found in the analysis of the intersectionality of sexual orientation, class and race, further aggravates the prejudice and discrimination experienced. Black lesbian women face the accumulation of the color marker in their struggles and financial vulnerability affects lesbian women even more, especially in the face of family discrimination, when it can force them to leave home. Thus, the analysis of the interviews identified that interactions with family members, especially with women in the family, can be both sources of support and stress, significantly influencing the mental health of the interviewees, revealing that family acceptance or rejection affects anxiety levels of lesbian women. The research also revealed the role of religion in the lives of the interviewees and how religious backgrounds can contribute to increased levels of anxiety, as well as establishing themselves as a source of well-being and belonging. The study revealed that lesbian women can face great difficulty breathing when they come out of the closet, as the looks of family members who could welcome them often fail to recognize their identity.
Aceitação do uso de robôs de serviço no cuidado e apoio às pessoas idosas
(Universidade Federal de São Carlos, 2024-07-23)
Cesário, Larissa Cayla
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Mendes, Glauco Henrique de Sousa
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https://lattes.cnpq.br/7564259060572565
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https://orcid.org/0000-0001-8086-3321
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https://lattes.cnpq.br/4633633758571142
Social service robots constitute an alternative solution for the care of elderly individuals. Their usage has become popular in several countries, especially those experiencing intensified shortages of healthcare human resources. However, this technology remains underexplored in Brazil. The objective of this study was to identify factors contributing to the acceptance of service robots in the care of elderly individuals in Brazilian households. To achieve this, three research stages were conducted using different methods. The first stage involved a bibliometric review to identify key research themes in literature concerning social service robots and elderly care. The second stage utilized a survey to assess acceptance and intention to use social service robots among a sample of potential users in Brazil, employing the adapted Service Robot Acceptance Model. The third stage comprised semi-structured interviews to delve deeper into issues regarding potential users' detailed impressions of service robot usage. Results revealed the intellectual framework of this literature organized into six clusters: (i) robot acceptance and design, (ii) social role and ethical values, (iii) barriers and criticism, (iv) effects, efficacy, and impact of robot use, (v) therapeutic use of robots, and (vi) perceptions of healthcare professionals and services, alongside a proposed future research agenda. In stage 2, data were analyzed using Structural Equation Modeling techniques, while interview data were subjected to Content Analysis. Findings confirm the Service Robot Acceptance Model within the context of elderly care, demonstrating high predictive capacity. Additionally, the value of social service robots was confirmed, emphasizing significant functional elements for elderly acceptance. Moreover, elderly individuals expressed an intention to use social service robots for emotional comfort. However, they did not perceive robots as real people capable of fully replacing human care, indicating the establishment of a relationship with emotional boundaries. This dissertation contributes to advancing research on the topic and supporting elderly care and support within the Brazilian national context.
Design of Ti-Nb-Cr alloys for hydrogen storage: exploring hydride destabilization through Nb/Ti ratio adjustment
(Universidade Federal de São Carlos, 2024-07-23)
Dias, Gabriela Chimello Mayer
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Zepon, Guilherme
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https://lattes.cnpq.br/7924187202036614
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https://lattes.cnpq.br/7085380229734116
Hydrogen is emerging as a promising alternative to fossil fuels amidst concerns over depleting reserves and environmental impacts. However, efficient hydrogen storage remains a significant challenge for widespread application. Solid-state storage, especially using metal hydrides, presents a promising solution for efficient storage at moderate pressure conditions. Alloys with a body-centered cubic (BCC) structure, such as those in the Ti-V-Cr and Ti-V-Nb-Cr systems, have shown promising properties. Notably, studies specifically on hydrogen storage in Ti-Nb-Cr ternary system alloys are scarce, with results emphasizing high hydride stability. To enhance the efficiency of MH-based hydrogen storage systems, achieving hydrogen desorption at low temperatures is crucial. In this context, this study investigates the hydride destabilization in the Ti-Nb-Cr system by designing alloys with a reduced concentration of the stronger hydride-forming element, Ti, and an increased fraction of the weaker hydride-forming element, Nb. To favor a predominant body-centered cubic (BCC) phase, Cr content was maintained below 35 at.%. The impact of these compositional adjustments on key properties for solid-state hydrogen storage was thoroughly examined. Trends in the plateau pressures of the Pressure-Composition-Temperature (PCT) diagrams were predicted using a thermodynamic model. Four compositions were studied: Ti1.0Nb1.0Cr1.0, Ti0.8Nb1.4Cr1.0, Ti0.6Nb1.8Cr1.0, and Ti0.4Nb2.2Cr1.0. These alloys were synthesized via arc melting and predominantly exhibited a BCC phase with a fraction of C15 Laves phase. All alloys showed rapid absorption kinetics and attained maximum hydrogen storage capacities of 2.79 wt.%, 2.30 wt.%, 2.23 wt.%, and 2.09 wt.%, as the Nb/Ti ratio increased. After 10 cycles, capacities decreased by 0.20 wt.%, 0.16 wt.%, 0.17 wt.%, and 0.26 wt.%, respectively. PCT diagrams indicated that increasing the Nb/Ti ratio resulted in higher plateau pressures, nearly reaching 1 bar in absorption for the Ti0.4Nb2.2Cr1.0 alloy. Thermal analysis revealed that the enthalpy of desorption became lower with increasing the Nb/Ti ratio, indicating hydride destabilization.
Implicações da insônia e do tempo de duração do sono na redução da força neuromuscular e velocidade de caminhada em pessoas idosas: evidências do estudo ELSA
(Universidade Federal de São Carlos, 2024-07-24)
Silveira, Leticia Coelho
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Alexandre, Tiago da Silva
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https://lattes.cnpq.br/5393622641681701
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https://orcid.org/0000-0003-3791-9793
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https://lattes.cnpq.br/7670409228888469
Introduction: The decline in neuromuscular strength (NS) and walking speed (WS) are associated with adverse outcomes in older adults, such as falls, hospitalizations, functional decline, and death. Although multifactorial, the decline in NS and WS appears to be influenced by insomnia symptoms and sleep duration. However, the little longitudinal evidence on the topic is controversial, and exploring this topic in studies with more extended follow-up periods is essential. Objectives: This dissertation has two objectives: 1) Analyze sex differences regarding the influence of sleep duration and insomnia symptoms on the trajectory of NS decline in people aged 50 or over during eight years of follow-up, and 2) Analyze the influence of sleep duration and insomnia symptoms on the trajectory of WS decline in people aged 60 or over during eight years of follow-up. Methods: Data came from the English Longitudinal Study of Aging (ELSA Study). To analyze the trajectory of NS decline, 6,429 participants aged 50 years or older with NS ≥ 27 kg for men and ≥ 16 kg for women were included. To analyze the trajectory of WS decline, 3,208 participants aged 60 years or over with WS > 0.8 m/s were included. In both studies, insomnia symptoms were assessed using the adapted and validated Jenkins questionnaire, and sleep duration was analyzed by self-report and classified as short (≤6 hours), ideal (>6 to <9 hours), and long (≥ 9 hours). Generalized linear mixed models estimated the decline rates of NS stratified by sex and WS in separate models as a function of insomnia symptoms and sleep duration and controlled for sociodemographic, behavioral, clinical, and anthropometric characteristics. Results: Regarding NS, over the eight years of follow-up, the greater number of insomnia symptoms was associated with a higher rate of NS decline in men (– 0.02 kg per year 95% CI – 0.04 – – 0. 01) while long sleep duration (≥ 9 hours) was associated with a higher rate of NS decline in women (– 0.14 kg per year 95%CI – 0.26 – – 0.03). Regarding WS, over the eight years of follow-up, only long sleep duration (≥ 9 hours) was associated with a higher rate of decline in WS (– 0.01 m/s per year 95% CI – 0.02 – – 0.01). Conclusion: Sleep changes influence the rate of NS decline differently between the sexes. In men, increased insomnia symptoms, while in women, long sleep duration (≥ 9 hours) increases the rate of NS decline in people aged 50 and over. As for WS, long sleep duration (≥ 9 hours) increases the risk of WS decline in people aged 60 years or older of both sexes.
Fatores de influência no engajamento e confiança em equipes SCRUM na migração do regime de trabalho presencial para o híbrido em uma empresa do setor aeronáutico
(Universidade Federal de São Carlos, 2024-07-24)
Resende, Cassio Lara
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Delai, Ivete
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https://lattes.cnpq.br/7054145506480670
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https://lattes.cnpq.br/3564549747499974
This study analyzed the factors that influence the engagement and trust of agile teams in the migration from in-person to hybrid work (part remote and part in-person) due to the COVID-19 pandemic, through the analysis of a product engineering department in the aeronautical industry. The COVID-19 pandemic forced the company to put the entire department into remote work and later into a hybrid work regime. This study evaluated whether there was a change in the factors that make up performance in this migration to the hybrid work regime in this company, which uses the agile approach in team management with the SCRUM method as a tool for managing activities. Agile methods were developed to be applied in a face-to-face environment and have as a central characteristic the interaction between team members, with quick and daily meetings, the so-called stand-up meetings. Problems faced by companies that use agile approaches in a remote environment were found in the literature, such as difficulties in using SCRUM ceremonies and decreased team autonomy with increased control over activities, thus influencing performance factors. A questionnaire was developed based on seven factors: autonomy, communication, ceremonies, roles, engagement, trust, and mutual support. The questions used a Likert scale from 1 to 5, and the interviewees responded about two periods, before the pandemic (in-person) and after the pandemic (hybrid), in addition to answering questions about their knowledge of the SCRUM method. After applying the questionnaire to the company studied, the data were compiled and analyzed using partial least squares structural equation modeling (PLS-SEM). Statistical analysis of the data showed that there was no significant change in the relationships between the factor’s engagement, trust and mutual support, that influence the performance of agile teams, thus demonstrating that the model of relationships in remote and hybrid work regimes does not change. Likewise, there was no change in the variables that make up the agile performance factors (engagement, trust and mutual support). Based on the characterization of the members, the problems encountered in the application of the method, such as roles and ceremonies, may be related to the lack of knowledge and training of the teams, especially the SCRUM master. This study brought as a theoretical contribution to the literature, the study of impact on the performance of product engineering in a non-software development company, in a hybrid work regime (part remote and part in-person), compared to in-person work, responding to the academic gap. As a technological product, this study developed a conclusive technical report demonstrating how the factors that influence team performance were not changed in the migration from in-person to hybrid work, as well as the main factors that influence such performance in order to support the company in proposing improvements to the SCRUM method.
Alternância pronominal e concordância nominal e verbal na língua bissau-guineense
(Universidade Federal de São Carlos, 2024-07-25)
Nunes da Fonseca, Janifer
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Araújo Vale, Oto
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https://lattes.cnpq.br/2277403284693571
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Rubio, Cássio Florêncio
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https://lattes.cnpq.br/8357993415342241
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.
Modulation of semiconductors with transition metals: morphological, optical, and electronic properties
(Universidade Federal de São Carlos, 2024-07-25)
Patrocinio, Katiana Lima do
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Silva, Elson Longo da
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https://lattes.cnpq.br/9848311210578810
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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.
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
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Rodrigues, Ariano De Giovanni
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https://lattes.cnpq.br/4881530489438346
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Godoy, Marcio Peron Franco de
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https://lattes.cnpq.br/2609654784637427
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
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Gracioso, Luciana de Souza
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https://lattes.cnpq.br/4898201916360294
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https://orcid.org/0000-0002-6320-4946
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https://lattes.cnpq.br/4502391092205826
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.
Esgoto doméstico tratado como aporte hídrico e nutricional no cultivo de antúrio de corte
(Universidade Federal de São Carlos, 2024-07-26)
Gasparini, Amanda Ramos
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Rodrigues, Josiane
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Souza, Claudinei Fonseca
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https://lattes.cnpq.br/4858219292242433
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https://lattes.cnpq.br/3314307065207131
In recent years, the agricultural sector has faced an increase in the demand for water resources and nutrients. However, human activities have impaired natural nutrient cycles, worsening the already uneven natural distribution of water. A sustainable option to mitigate water and fertilizer shortages is the use of treated domestic sewage, which, in addition to meeting the water demand of plants, provides nutrients and organic matter. This study evaluated the effects of the application of treated domestic sewage on the protected cultivation of anthurium. The experiment was conducted on suspended benches, where the plants were grown on coconut fiber substrate in Styrofoam gutters, within a protected environment. The treatments were: (TRA) treated domestic sewage supplemented with mineral fertilizers, (TA) drinking water supplemented with mineral fertilizers and (TR) exclusively treated domestic sewage. The experimental design was randomized blocks, with the data submitted to the Tukey test. The exclusive application of treated domestic sewage in the TR resulted in nutritional deficiency and below-average productivity for anthurium. The biometric parameters (length of stem, spadix, spathe, largest leaf, number of leaves, flowers and plant height) and productivity in TRA did not differ statistically from TA, indicating that the use of treated domestic sewage supplemented with nutrients showed high productivity compared to TR. Despite the presence of Escherichia coli in the treated sewage, the cultivation was safe, with no contamination in the plants. The TRA and TA treatments showed similar efficiency in water consumption, with averages of 1.9 and 1.8 mm per day, respectively, and higher water use efficiency (WUE) of 403 and 396 flowers m-3, due to fertilizer supplementation. The TR treatment had lower water consumption (1.5 mm per day) and lower efficiency (WUE of 343 flowers m-3), resulting in plants with inferior development and lower flower quality due to nutritional deficiency. Over two years, the TRA treatment had a productivity of 372,678 flowers per hectare, with no significant difference in relation to the TA treatment, which had 362,946 flowers per hectare. The TR treatment had a lower productivity of 257,767 flowers per hectare. It is concluded that the application of treated domestic sewage as an alternative and sustainable source of water and nutrients in coconut fiber substrate in a protected environment is viable for the cultivation of anthurium, without compromising the health safety of professionals and consumers.
Modelagem e análise de frequências de manipuladores paralelos acionados por cabos
(Universidade Federal de São Carlos, 2024-07-26)
Ribeiro Filho, Marcelo Cerchi Ribeiro
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Fontes, João Vitor de Carvalho
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https://lattes.cnpq.br/9473668144091435
Cable-Driven Parallel Manipulators (CDPRs) are an innovative class of robots that use cables instead of rigid links, offering high dynamics, load capacity, and flexibility. This work addresses the modeling and analysis of the natural frequencies of CDPRs, aiming to prevent resonance issues that can compromise the precision and operational efficiency of these systems. The developed methodology includes the mathematical modeling of CDPRs and the analysis of natural frequencies with variations in cable tension and end- effector position. The results indicate that system rigidity, and consequently the natural frequencies, are highly influenced by cable tension, especially in higher vibration modes, which showed greater sensitivity to positional changes compared to lower modes. The research demonstrated that increasing the minimum tension in the cables can reduce the risk of resonance, providing greater stability to the system. This study contributes to a better understanding of the dynamics of CDPRs and suggests control strategies for safe and efficient applications in fields such as astronomy, logistics, and medical rehabilitation.
Transferência de elétrons em complexos de Rutênio (II) Perileno Diimida
(Universidade Federal de São Carlos, 2024-07-26)
Tiyoda, Anderson Jun
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Carlos, Rose Maria
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https://lattes.cnpq.br/1589143355309943
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https://lattes.cnpq.br/0641091681781723
Ruthenium(II) polypyridyl complexes are among the most studied metal complexes, with numerous articles and book chapters dedicated to them due to their properties being used in technological and medical fields, such as applications in photocatalysis and dynamic phototherapy, among others. Photochemistry is one of the most important processes for living beings due to photosynthesis, which starts from simple molecules and sunlight to efficiently produce a complex carbohydrate and oxygen gas, the last being essential for aerobic living beings. Ru(II) complexes with perylene diimide (PDI) ligands exhibit interesting characteristics for studies of electron and charge transfer, such as long triplet state lifetimes in the nanosecond range. Due to this long lifetime, the complexes can be applied in the production of singlet oxygen and for photodynamic therapy.
Vesículas extracelulares: ações no microambiente tumoral e possíveis aplicações terapêuticas
(Universidade Federal de São Carlos, 2024-07-26)
Pachane, Bianca Cruz
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Altei, Wanessa Fernanda
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https://lattes.cnpq.br/3727790337302830
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https://orcid.org/0000-0002-6636-7951
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Araújo, Heloísa Sobreiro Selistre de
Extracellular vesicles (EVs) are particles delimited by a bilipid layer, secreted by cells for intercellular communication. EV release is favored under certain conditions, such as in cancer, where it interferes in multiple processes including the metastatic cascade and the tumor microenvironment. Studying the basic and applied biology of EVs enables the elucidation of new mechanisms of interest to human health, suggesting new therapeutic potentials. In this work, we explored the adhesive characteristic of EVs for in vitro applications, investigating their adsorption on glass surfaces using super-resolution microscopy and proposing a novel method for utilizing common laboratory materials for advanced applications. We investigated the detailed characteristics of EVs from breast cancer cells through proteomics, observing a clear difference in protein composition between hypoxic and normoxic vesicles. In cellular studies, the self-signaling of hypoxic EVs favored cell invasion under optimal oxygen conditions. In co-culture models using cells from the tumor microenvironment, we verified that hypoxic EVs act to recapitulate the cellular phenotype, maintaining cell cohesion in tumor and promoting a pro-tumoral microenvironment. Scaling up the study for potential therapeutic applications, we investigated the internalization of model EVs by human B cells ex vivo, corroborating previous findings in primate models and enabling further advancements in pharmacokinetic and biodistribution studies.
Recursos digitais em aulas de espanhol: experiências de professores durante as aulas remotas e presenciais
(Universidade Federal de São Carlos, 2024-07-26)
Bueno, Melanie Zambon
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Gregolin, Isadora Valencise
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https://lattes.cnpq.br/1015869228676997
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https://orcid.org/0000-0002-9345-3126
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https://lattes.cnpq.br/0397450512944041
Con la pandemia Covid-19, la interacción en lengua española se trasladó de un ambiente físico, en el que el contacto entre los alumnos era mutuo, a un ambiente virtual, que depende de varios factores para que ocurra, desde los equipos utilizados, como las computadoras, hasta la velocidad del internet (Kenski, 2003). Con eso, muchos alumnos se quedaron sin acceso a las clases, lo que perjudicó la interacción con sus profesores y amigos. El cambio del aula presencial para el virtual trajo también muchas discusiones acerca de la ubicuidad del conocimiento (Santaella,2013), llevando a la necesidad del desarrollo de nuevas competencias digitales, para que los docentes hicieran de las herramientas digitales más que simplemente un auxilio en las clases, hacerlas recursos digitales, parte de la planificación y del enfoque(Mayrink y Albuquerque-Costa, 2017). En vista de este escenario, desarrollamos una investigación en la graduación (Bueno, 2021) objetivando identificar, junto a un grupo de profesores de español de las enseñanzas fundamental y media, las posibilidades y limitaciones de tecnologías digitales utilizadas antes y durante la pandemia para la interacción con los alumnos, ya que interactuar en la clase de lengua española es muy importante para que el alumno pueda construir su conocimiento, según Amendolara (2008). Los resultados alcanzados en nuestra investigación anterior evidenciaron la importancia de profundizar más la recolección de datos y los análisis y, entonces, propusimos la continuidad de esta investigación en nivel de maestría. Son objetivos de esta disertación, por lo tanto, profundizar discusiones con respecto a la forma como son utilizadas las tecnologías digitales en la enseñanza y aprendizaje de lengua española, identificar cuáles recursos digitales fueron utilizados para promover la interacción por este mismo grupo de profesores de español con el regreso a las clases presenciales y discutir las dificultades de su inserción en clases, bien como sus potencialidades interactivas; además de entender la visión del grupo sobre Competencia Digital, para hacer una reflexión. Metodológicamente, la investigación posee carácter cualitativo-exploratorio (Oliveira, 2008) y longitudinal (Goldstein, 1979) y se desarrolló en tres etapas. En la etapa inicial, se realizó una revisión bibliográfica en Google Scholar y en Portal de Periódicos CAPES de investigaciones y publicaciones anteriores en el área de Lingüística y Lingüística Aplicada sobre el uso de recursos digitales para la enseñanza de español como lengua extranjera en Brasil. En posesión de estos datos, elaboramos un cuestionario y una entrevista semi estructurados que fueron respondidos por el grupo de profesores. La segunda etapa consistió en la recolección de respuestas para profundización y la última etapa consistió en la sistematización y el análisis comparativo de los datos recopilados en 2020-2021 y 2022-2023. La investigación se basa en estudios teóricos sobre el uso de tecnologías digitales en el campo educacional general (Kenski, 2003) sobre la tecnopedagogía crítica (Román-Mendoza, 2018) y sobre el uso de tecnologías en la enseñanza de lenguas en el campo de la Lingüística Aplicada (Soto, Mayrink y Gregolin, 2009; Paiva, 2008; Tallei, 2011;2014; Fraga, 2013; Gregolin, 2017; y Abio, 2017). Por medio de estos datos, se hizo posible identificar nuevas maneras de integrar tecnologías a prácticas didácticas durante la pandemia, tendencia que no se observó en las prácticas presenciales previas y posteriores a ella.
Variáveis hematológicas, imunológicas e regulação iônica em Tilápia-do-Nilo, Oreochromis niloticus coletadas em lagoas da Grande Vitória -Espírito Santo- em áreas de influência de atividades metalúrgicas
(Universidade Federal de São Carlos, 2024-07-26)
Carvalho, Luana Beserra de
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Souza, Iara da Costa
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https://lattes.cnpq.br/5391583114634391
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Fernandes, Marisa Narciso
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https://lattes.cnpq.br/3021357484136942
Aquatic ecosystems, especially those located close to urban centers and metallurgical activities, are receptors of wastewater and deposition of particulate matter from surrounding activities. Brazil is one of the largest producers and exporters of iron ore, with emphasis on the state of Espírito Santo, where two of the largest metallurgical complexes in the country are located, the Tubarão and Ubu Complex. In this scenario, this study aimed to evaluate the blood, gills and kidneys of Nile tilapia, Oreochromis niloticus collected in coastal lagoons influenced by metallurgical activities (Maemba and Carapebus) and in an aquaculture facility (Alegre) located in Alegre, 140 km from metallurgical industries. Water and sediment, and blood, gills and kidneys of O. niloticus collected in these lagoons and in Alegre were analyzed for the presence and concentration of metals. In fish, the relative condition factor (Kn) and multibiomarkers (hematological, immunological, physiological, genotoxicity and mutagenicity) were analyzed in the blood (plasma and erythrocytes) to evaluate animal health, and multibiomarkers (biochemical, morphological and physiological) were analyzed in the gills and kidneys to verify the mechanisms of osmotic and ionic regulation. The physical and chemical parameters of the water influence the ecosystem of these lagoons, the bioavailability of metals and the osmoregulation. The analysis of the main components separated Alegre from the other lagoons that are influenced by waste from metallurgical industries. Although some metals in the water and sediment of Alegre were higher than in the lagoons, the concentrations of metals in the blood of fish from Alegre were lower compared to that of fish collected in Maemba and Carapebus, while in the gills and kidneys, some metals were higher. higher than in the lagoons. Fish from the Maemba M1 lagoon showed anemia and lower osmolality. Fish from the Carapebus lagoon had higher percentage of micronuclei suggesting the presence of genotoxic agents in the water or sediment, and had the highest Cl- concentration, which may be related to an adjustment to the brackish water in which they live. The activity of Na+/K+-ATPase, H+-ATPase and carbonic anhydrase enzymes, ionocyte fractional area in the gill surface and in renal tubular area varied in the fish of lagoons due to physicochemical characteristics and metal concentration of the lagoons. In conclusion, fish from Alegre have the best health conditions when compared to fish located in lagoons close to metallurgical activities confirming the hypothesis that fish collected in lagoons close to mining and steel activities have a more compromised health due to the human influences around them compared to fish from a region without these industries (Alegre).
Teorema de Pitágoras: proposta de sequência didática para o trabalho com demonstrações no 9° ano do ensino fundamental
(Universidade Federal de São Carlos, 2024-07-26)
Gomes, João Lorena de Jesus Gomes
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Massago, Sadao
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https://lattes.cnpq.br/1915704875970931
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https://lattes.cnpq.br/1915704875970931
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https://orcid.org/0000-0002-3486-3811
This work adresses the role and importance of demonstrations in Mathematics classes for the final Years of Elementary Education. To this end, it considers as a starting point the BNCC, which includes the performance of demonstrations among the skills that students should acquire throughou their schooling. It discusses the demonstration as intrinsic characteristic of Mathematics, as a means of validation and advancement in the most diverse fields of study of this Science. It also presents he suggestion of three demonstration of the Pythagorean theorem that can be carried out together with 9th-grade students of Elementary Education, in order to answer the guiding question “How is it possible to perform demonstrations of the Pythagorean theorem in Elementary Education?”.
Desenvolvimento de produto e Tecnologia Assistiva: uma revisão sistemática de modelos de auxílio à prática projetual de dispositivos assistivos
(Universidade Federal de São Carlos, 2024-07-26)
Barros, Fabio Lopes
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Borrás, Miguel Ángel Aires
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https://lattes.cnpq.br/0247842684077591
The purpose of this study is to identify common patterns in the development processes of assistive products by conducting a systematic literature review. The study focuses on articles from scientific databases that present studies on the design process in Assistive Technology (AT). The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodological tool was used to identify 116 relevant articles on AT development methodologies in the Scopus, SciELO, and Web of Science databases. Based on the criteria proposed by the PRISMA logic 15 articles were selected for analysis. Despite the diversity of methodological approaches found, the data and information were systematized to identify patterns that unified them. The findings of this study revealed a methodological approach that unifies the patterns, and it is presented as the main result.
(Nano)partículas metálicas para diferentes arquiteturas de dispositivos eletroquímicos
(Universidade Federal de São Carlos, 2024-07-26)
Orzari, Luiz Otávio
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https://orcid.org/0000-0001-9707-9795
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Janegitz, Bruno Campos
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https://lattes.cnpq.br/7746094938977989
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https://lattes.cnpq.br/3384547719546332
In this doctoral thesis, new architectures of electrochemical systems for fuel cells, sensors and biosensors were developed. To this end, various methodologies for adding metallic particles to the surface of the working electrode were explored, following characterizations and investigations into their behavior and subsequent applications in energy efficiency and/or determination of analytes. Firstly, a multifunctional device was developed, exploring the combination of fuel cells with electrochemical sensing, in a single system. To this end, compositions of carbon-supported electrocatalysts were investigated, involving the metals Pd, Ag and Bi. In the ethanol oxidation reaction, the Pd50Ag45Bi05/C catalyst demonstrated interesting behavior and cost-efficiency, being subsequently used for the determination of dopamine in synthetic urine samples. Two analytical curves were obtained for the sensor: one involving the direct oxidation of dopamine from 4.0 to 40 µmol L−1, with a detection limit (LOD) equal to 0.035 µmol L−1; and another, due to the complexation that occurs between catecholamines and metal surfaces, from 0.2 to 1.0 µmol L−1, with a LOD of 0.14 µmol L−1. The second device is an electrochemical sensor and immunosensor, in which Pd nanoparticles were electrodeposited on the surface of the working electrode. To this end, a new conductive carbon black and polyvinyl acetate ink was developed to manufacture the three-electrode system. With the aid of Design of Experiments, the parameters for metal deposition were investigated and the sensor was applied to determine epinephrine in synthetic cerebrospinal fluid samples. Afterwards, the sensor was modified with cysteamine and glutaraldehyde for proper immobilization of Anti--synuclein. The biosensor was then used to construct a calibration curve of -synuclein phosphate buffer, with a linear range between 1.5 and 15 g mL−1 (LOD = 0.13 g mL−1) and in samples of human blood serum, in a linear range of 6.0 and 100.5 g mL−1 (LOD = 1.31 g mL−1), by electrochemical impedance spectroscopy, demonstrating its efficiency in more complex environments. The third system involved the use of Au microflowers electrodeposited on the surface of the previously developed conductive ink, to increase the capacitance response of the material. Design of Experiments was used to optimize the conditions of the self-assembled layers for biosensor modification. Once the best working conditions were defined, non-faradaic electrochemical impedance spectroscopy was used to find a linear range between capacitance and PARK7/DJ-1 concentration, corresponding to the region of 20 to 120 ng mL−1. The LOD obtained for this system was 0.207 ng mL−1. The device was then applied to a fortified synthetic cerebrospinal fluid sample, where it showed attractive responses using the spike and recovery method. Finally, a last device was developedfor the oxidation of ethanol, seeking to combine the properties of Au and Bi to produce a more attractive device for catalytic processes. Full factorial and Doehlert matrix designs were used to find an optimal composition between the metals. An extensive morphological and electrochemical characterization was carried out, seeking to understand the behavior of the conductive ink modified with each of the metals separately, as well as with their mixture. Considered a less efficient catalyst due to its high chemical stability, Au becomes much more efficient in synergy with low concentrations of Bi, but the material does not have complete regeneration of its surface, being more suitable for processes in which current generation must be high in a short space of time.