Federal Institute of Santa Catarina
  • Florianópolis, Santa Catarina, Brazil
Recent publications
In Brazil, the optimal dose of phosphorus in the cultivation of yerba mate (Ilex paraguariensis St. Hil.) clones has yet to be defined. This study verified the productivity of yerba mate clones in response to the application of P doses and determined the critical level of the nutrient in soil and yerba mate leaves. The experiment was developed in Itaiópolis-SC, in humic cambisol, from 2013 to 2020. Five doses of the nutrient were evaluated in two clones (BRS-BLD Aupaba and F2) of yerba mate. Fertility was defined by planting/post-planting (0, 2.3; 4.5; 6.8, and 9.0 g plant-1), canopy formation 1 (0, 10, 20, 30, 40, and 50 g plant-1), canopy formation 2 (0, 15, 30, 45, and 60 g plant-1), and production (0, 16.7; 33.3; 50.0; 66.7 kg ha-1). Harvests took place between July 2015 and January 2020, at 18-month intervals. The productivity of leaves, fine branches, and thick branches was evaluated. In the 2020 harvest, soil and leaf samples were collected to determine the critical level of P. The productivity of clone components increased with phosphate fertilization in all evaluated harvests. The critical levels of P for clones, Aupaba and F2, were 5.2 and 6.3 mg dm-3 in soil and 1.03 and 1.11 g kg-1 in leaves, respectively. Yerba mate is demanding of P, expressing maximum productivity in the planting phase, canopy formation 1 and 2, and production when doses of 5, 25, 40 g plant-1, and 35 kg ha-1 of P2O5 are applied, respectively.
Resumo Este artigo apresenta os resultados de uma pesquisa de revisão sistemática que teve como tema geral a avaliação da leitura. O problema que moveu a pesquisa foi: Que parâmetros, critérios e condições da avaliação podem ser distinguidos nas investigações sobre a avaliação da leitura no Brasil? Objetivou-se, portanto, identificar, caracterizar e discutir pesquisas que foram realizadas no Brasil sobre a avaliação da leitura, entre os anos 2014 e 2020. Neste estudo, focalizaram-se três aspectos centrais das 151 publicações selecionadas, conforme rigorosos critérios de inclusão descritos no método: 1) os processos cognitivos investigados; 2) as habilidades de leitura medidas; e 3) os instrumentos de testagem utilizados. Como critério de análise foram observados os perfis das pesquisas (tipo, ano, local, instituição de vínculo, programa de pós-graduação, autoria, base de dados) e os seus conteúdos (foco, objetivo, público-alvo, instrumento de avaliação da leitura, habilidades medidas, resultados). A análise indicou que as pesquisas experimentais, voltadas principalmente para estudantes dos primeiros anos do Ensino Fundamental, foram as mais frequentes, tendo como processos cognitivos investigados pela maioria a decodificação e suas habilidades relacionadas (reconhecimento de palavras, acesso lexical e fluência). Os resultados mostraram ainda que, de forma geral, os métodos de pesquisa são relatados com poucos detalhes, o que limita a identificação das justificativas para balizar as decisões de elaboração ou escolha dos instrumentos empregados. Além disso, entende-se que a falta de rigor ou clareza desses aspectos também dificulta ao leitor a compreensão de como a pesquisa foi desenvolvida e do quão confiável ela é.
This paper presents the results of a systematic review on reading assessment. The problem that inspired the research was: What parameters, criteria, and assessment conditions can be distinguished in investigations on reading assessment in Brazil? Therefore, the goal was to identify, characterize, and discuss studies that were carried out on reading assessment in Brazil between 2014 and 2020. The focus of the study was on three central aspects of the 151 selected publications, according to the strict inclusion criteria described in the method: 1) the investigated cognitive processes, 2) the measured reading skills, and 3) the testing instruments used. As a criterion for analysis, we observed the research profiles (type, year, location, institution, graduate program, authorship, database) and their contents (focus, objective, target audience, reading evaluation instrument, measured skills, results). The analysis indicated that experimental studies, aimed mainly at students in the first grades of elementary school, were the most frequent, with decoding and its related skills as the most commonly investigated cognitive processes (word recognition, lexical access, and fluency). The results also showed that, in general, authors report the research methods with little detailing, which limits the identification of arguments to guide the decisions concerning elaboration or choice of instruments used. In addition, the lack of rigor or clarity of these aspects also makes it difficult for readers to understand the development of the studies and evaluate their reliability.
Metonymy is a pervasive linguistic/cognitive mechanism in everyday language. Still, studies assessing its comprehension are rare in the literature. Our goal is to present the elaboration of a verbal metonymy comprehension task in Brazilian Portuguese as well as test it using pilot studies. The task was based on the cognitive linguistics framework and psychometric guidelines were considered. The construction of the task considered psycholinguistic variables and included a conventionality task and an expert analysis. Three studies (N = 290, ages ranging 2 to 54 years old) were conducted until we reached a final version. The study resulted in a task composed of one practice item and six test items. Each item includes a sentence-stimulus and two questions (one open-ended and one closed-ended). Together, the items make up a raw score that represents metonymy comprehension. Data obtained from the pilot studies show that metonymy comprehension improves gradually with age and that there is a significant difference between items in both types of questions. This is in consonance with the literature, and thus points towards the instrument’s construct validity. The study results in a task that presents enough sensitivity to gauge comprehension of this phenomenon at different ages. Keywords: metonymy; metonymy comprehension; figurative language; psycholinguistic task elaboration; cognitive linguistics
Recentemente, no Brasil, tem sido observado um incremento na oferta de vinhos embalados em lata de alumínio. Por conseguinte, este estudo objetivou, por meio da aplicação de um questionário para consumidores brasileiros de vinhos, avaliar a sua percepção em relação ao vinho apresentado em lata. Foi obtido um total de 481 (n=481) respostas de consumidores brasileiros de vinhos com ênfase no emprego da lata de alumínio. De entre os mesmos, 75.7% (n= 364) já sabiam da existência de vinhos em lata, sendo que 55.2% souberam nos últimos cinco anos, tendo a internet como a principal fonte de informação. Dos 364 participantes cientes da existência de vinhos enlatados, 57.4% (n=209) já os consumiram, sendo o supermercado (50.2%) o principal local de compra, seguido de loja especializada em vinhos (35.4%). Dos respondentes, 83.3% consumiram o vinho em lata em casa e 21.1% consumiram em ambiente ao ar livre. Os principais estilos de vinhos enlatados adquiridos pelos consumidores (n=209) foram: vinho branco seco (51.7%), vinho tinto seco (45.9%) e vinho rosé seco (40.7%). Aplicou-se ainda a técnica de associação livre de palavras (n=209), obtendo-se 522 associações, sendo que 52.4% delas referiam-se à definição do vinho em lata relacionadas com a própria embalagem, com as principais menções direcionadas para a funcionalidade e a conceitualização do envase. Neste estudo, constatou-se que o uso da lata para envase de vinho é uma opção recente e que os consumidores estão abertos a conhecer e a consumir o produto nesta embalagem.
The purpose of this paper is to evaluate the life cycle of vehicles with Body in White developed in new generation steels (New BIW), in comparison to the current steels used (Current BIW), in order to reduce the mass of the vehicle and anthropogenic emissions. The method was based on the estimation of anthropogenic emissions through simulation in Module GREET2.7, where the life cycle of vehicles with BIW developed in new generation steels (New BIW) was compared with BIW in steels currently used (Current BIW), in order to reduce the mass of the vehicle and its respective emission. As a result, a 2.65% reduction in vehicle mass was obtained, which resulted in a reduction of 0.11 tons of greenhouse gases. Just as, in the comparison of simulated emissions, between the current BIW and the new one, there is a reduction in total GHG emissions of 2.8% during the life cycle of the materials, of 3.6% during the life cycle of the Body of vehicles (BIW, interior, exterior and windows), 2.04% over the complete life cycle of vehicles and 0.78 ℓ/100 km of consumption. The conclusions show that the mass reduction of vehicles developed in new generation steels (New BIW) provides a significant change with regard to anthropogenic emissions, mainly in the vehicle use phase, due to the reduction in the burning of fossil fuels and the study provides an important decision-maker regarding the mitigation of global warming, as it is essential to recognize that motor vehicles are significant air polluters.
The objective of this work was to determine the storability of 'SCS417 Monalisa' apple fruit in response to harvest maturity, 1-methylcyclopropene (1-MCP) treatment, and storage atmospheres. Fruit quality was evaluated after two, four, six, and eight months plus one day or seven days in shelf life at 22°C. The controlled atmosphere (CA) and 1-MCP (1.0 μL L-1) treatments reduce fruit ethylene production and respiration, prevent rapid softening, and inhibit the incidence of scald-like symptoms, flesh browning, cracking, and fungal decay, in comparison with air storage . The combination of 1-MCP and CA provides additive benefits in firmness retention and in the reduction of the incidence of physiological disorders. CA and/or 1-MCP increase the risk of fruit developing wrinkly skin disorder. The loss of flesh firmness and acidity and the development of all physiological disorders and decay are higher in late-harvested fruit. The storage life of 'SCS417 Monalisa' apple is about two months in cold air and from six to eight months in cold CA, considering the time necessary to reach a flesh firmness of 53 N. The limiting factor for the long-term storage of 'SCS417 Monalisa' apple fruit under CA without 1-MCP is the development of physiological disorders and fungal decay.
The objective of this work was to characterize the phenology and the viticultural performance of advanced selections of grapevines resistant to fungal diseases obtained by the Julius Kühn Institute, Institute for Grapevine Breeding Geilweilerhof. The experiment was conducted in three different grape-growing regions of Santa Catarina State, Brazil, in the municipalities of Videira (840 m), São Joaquim (1110 m) and Curitibanos (1000 m) during the seasons of 2018/2019 and 2019/2020. The advanced selections evaluated were the reds Gf.2004-043-0010 (Gf.10), Gf.2004-043-0013 (Gf.13), Gf.2004-043-0021(Gf.21) and the white Gf.2004-043-0004 (Gf.04). We found that pyramided loci Rpv1+Rpv3.1 and Run1+Ren3 were present, which confer resistance to downy mildew and powdery mildew, respectively. The phenological stages events evaluated were budbreak, full bloom, veraison and maturity. The productive variables evaluated were fertility index, number of clusters, cluster weight and yield. Technological maturity parameters were soluble solids, total acidity and pH. To understand the relationship between the variables and whether these relationships changed depending on the cultivation environment the Multi-Trait Genotype–Ideotype Distance Index was used to rank the genotypes based on the analyzed traits. For most selections, the budbreak occurred in the second half of September; full bloom occurred from late October to mid-November; the veraison occurred between the end of December and mid-January; and maturity occurred between the end of January and February. The earliest budbreak occurred in the vineyard located at the highest altitude (1110 m - São Joaquim), while the earliest full bloom, veraison and maturity occurred in the lowest altitude vineyard (840 m – Videira). All selections produced grapes with adequate concentrations of pH and total acidity to produce quality wines. Except for Gf.13, all selections produced grapes with levels of soluble solids suitable to produce quality wines. Based on the Multi-Trait Genotype–Ideotype Distance Index (MGIDI) the selections Gf.13 and Gf.10 are the most promising genotypes for the Videira region (840 m) and Gf.10 is the most promising genotype for the regions of higher altitude, 1000 m and 1110 m.
Within festivals and events, film festivals are among the fastest growing cultural events in the world and are recognised as bringing environmental, sociocultural and economic benefits to host tourism destinations including enhanced well-being. These festivals are an important marketing strategy for developing destination image and attracting interest towards a destination. However, there are limited studies on the film festival experience exploring the antecedents of participants’ satisfaction. This study examines the relationship between eudaimonic feelings, novelty, local culture, nostalgia, perceived quality, satisfaction, and behavioural intentions. Data were gathered during the last 3 days of the Penedo Film in the City of Penedo, Northeast Brazil using a questionnaire. A total of 97 valid questionnaires were collected from the festival attendees. Findings show that only eudaimonic feelings and perceived quality are predictors of satisfaction. To the best of authors knowledge, this study is the first to examine the perceived experience of participants in a film festival context from a positive psychology perspective and providing further empirical support for construct validity of eudaimonic feelings. The findings contribute to the existing tourism literature on film festivals by identifying key antecedents (eudaimonic feelings and perceived quality) and outcomes (behavioural intentions) of satisfaction with film festival. One of the main managerial implications includes engaging film festival participants in co-creation processes and in promoting group discussions about a specific movie with an appealing and social relevant theme.
In this study, cellulose nanofibers (CNFs) were successfully isolated from rapeseed straw (RS) whose valorization has been rarely investigated to date. A combined bleaching method without chlorine was applied for the purification of cellulose fibers, previously unexplored for RS. Chemical composition analysis and Fourier-transform infrared spectroscopy (FTIR) indicated that the purification method eliminated hemicellulose and reduced lignin content from 24.4 % to 1.8 %. The isolation of CNFs was performed using sulfuric acid hydrolysis under different acid concentrations (55 and 60 % v/v) and hydrolysis times (15, 30, and 45 min). The isolated CNFs were characterized by FTIR, X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The formation of CNFs was confirmed by a significant increase in crystallinity index from 46.45 % of RS to >79.41 % of CNFs, depending on acid concentration and isolation duration. Carboxymethyl cellulose (CMC) films with different contents of CNFs were prepared by casting method. The mechanical properties and cytotoxicity of the prepared films were investigated. The CNFs obtained from RS via a chlorine-free purification method showed promising results for their usage as reinforcement in CMC matrix and film fabrication for various applications such as transdermal medicine and food packaging.
The objective of this work was to evaluate root phenotyping methods and the ideal phenological stage to quantify the root system of fixed and segregating common bean populations, in order to select superior genotypes. The experiment was carried out in two municipalities in the state of Santa Catarina, Brazil, and the treatments consisted of six genotypes, the Shovelomics and WinRHIZO root phenotyping methods, and the V4-4, R6, and R8 phenological stages. The simple lattice experimental design was used to evaluate the following variables: basal root angle, vertical root length, left and right horizontal root length, total root length, projected area, and root average volume and diameter. For all variables, there was a significant interaction between phenotyping methods and phenological stages, showing their influence on root system evaluation. The Shovelomics and WinRHIZO phenotyping methods are efficient in quantifying the root system of common bean plants and show specificity for phenological stages, regardless of the genotype. The quantification of the root system of fixed and segregating genotypes is analogous in both methods. The Shovelomics method is more efficient in evaluating the root system of common bean at the R8 stage, and the WinRHIZO method, at the R6 stage.
In this work, thin films based on the Ti-Zr system were studied, deposited on a silicon substrate by the magnetron sputtering technique using simultaneously a combination of High-Power Impulse Magnetron Sputtering (HiPIMS) and Direct Current Magnetron Sputtering (DCMS) sources. The objective of this work is analyzing the effect of varying HiPIMS frequency (300 Hz, 400 Hz, 500 Hz, and 600 Hz) on the characteristics and properties of the thin films. The thickness increased between 300 Hz and 500 Hz, where the thickness measured 563 nm and 732 nm, respectively; then it decreased to 709 nm at 600 Hz. Hardness and elastic moduli also tended to decrease with increasing frequency, and the results for the first property were between 7 GPa and 10.3 Gpa, while the elastic moduli were from 114 Gpa to 157 Gpa, in which lower values were reached at higher frequencies. In the wettability test, lower contact angles were observed for samples with lower frequencies due to their high surface energy, providing better hydrophilic properties.
Este artigo tem como objetivo analisar as produções didáticas, em forma de livros impressos e manuscritos, produzidas pelo professor Godofredo Schrader, S. J., que atuou em duas escolas localizadas na Província Sul-Brasileira pertencentes à Companhia de Jesus, entre os anos de 1905-1945. Para isso, atentamos para determinados aspectos acerca da formação e atuação do professor Godofredo Schrader, S. J., por meio de suas publicações na área da Geometria. Metodologicamente, este trabalho vale-se da Análise documental histórica, analisando fontes localizadas em três arquivos de Instituições Jesuítas. A pesquisa indica que as produções de Schrader se adequava a reforma Francisco Campos e ao currículo do Colégio Pedro II, do Rio de Janeiro e que circularam e foram utilizadas por professores de determinadas escolas da Ordem.
Devido à viticultura ser uma atividade em processo de consolidação na região do Planalto Norte Catarinense, os produtores não realizam um acompanhamento da qualidade físico-química dos seus produtos, com o objetivo de comparar e atender a legislação brasileira vigente e os padrões de qualidade. Neste contexto, o objetivo deste trabalho foi realizar a caracterização físico-química de sucos de uva elaborados na região do Planalto Norte Catarinense na safra 2021. O presente estudo foi realizado no Instituto Federal de Santa Catarina – IFSC Câmpus Canoinhas, abrangendo a região do Planalto Norte Catarinense - Santa Catarina. As avaliações foram realizadas em triplicata, sendo avaliados as variáveis: densidade relativa (g mL-1), sólidos solúveis (°Brix), Grau Glucométrico (°Babo), acidez titulável total (meq L-1) e pH. Observou-se para as dez amostras avaliadas, valores médios de densidade relativa de 1,0476 g mL-1. Para o teor de sólidos solúveis (°Brix) observou-se valor médio de 11,79° Brix. O grau glucométrico, expresso em °Babo, apresentou entre as amostras avaliadas valor médio de 9,82 °Babo, com valores variando de 7,0 a 15,0 °Babo. O valor médio para a variável acidez total titulável foi de 75,6 meq L-1, com valores entre 63,0 a 89,2 meq L-1. Observou-se valor médio de 3,32 para o pH das amostras, com valores variando de 3,2 a 3,62. O Planalto Norte Catarinense possui potencial para a elaboração de sucos de uva de qualidade, contudo, é importante atentar-se ao ponto de maturação das uvas colhidas, com intuito de obter produtos com maiores teores de sólidos solúveis, grau glucométrico e densidade relativa, além da necessidade de refinar o processo de elaboração.
The shift towards RES introduces challenges related to power system stability due to the characteristics of inverter-based resources (IBRs) and the intermittent nature of renewable resources. This paper addresses these challenges by conducting comprehensive time and frequency simulations on the IEEE two-area benchmark power system with detailed type 4 wind turbine generators (WTGs), including turbines, generators, converters, filters, and controllers. The simulations analyse small-signal and transient stability, considering variations in active and reactive power, short-circuit events, and wind variations. Metrics such as rate of change of frequency (RoCoF), frequency nadir, percentage of frequency variation, and probability density function (PDF) are used to evaluate the system performance. The findings emphasise the importance of including detailed models of RES in stability analyses and demonstrate the impact of RES penetration on power system dynamics. This study contributes to a deeper understanding of RES integration challenges and provides insights for ensuring the reliable and secure operation of power systems in the presence of high levels of RES penetration.
Tamarixia radiata (Waterston) is the main parasitoid wasp released in abandoned, organic, and non-commercial citrus groves and in orange jasmine areas for biological control of Diaphorina citri Kuwayama (a vector of bacteria associated with huanglongbing), as a control tactic in a strategy termed External Management. The effectiveness of parasitism is influenced by the release density and radius of action of this parasitoid. This study determined the optimal release density and radius of action of T. radiata in a commercial citrus grove. Parasitoids were released at five densities (200, 400, 800, 1,600, and 3,200 wasps/ha) at the center of circular areas with four different radii (7.5, 15, 22.5, and 30 m). The parasitism rate was assessed using ‘Valencia’ sweet orange seedlings, each bearing 35 D. citri fourth-instar nymphs, attached to 26-year-old ‘Valencia’ sweet orange trees along the perimeter of each radius. For the 7.5-m radius, the highest parasitism rate (74.1%) was observed at the density of 3,200 wasps/ha. However, for the 15-m radius, the density of 3,200 wasps/ha resulted in lower parasitism (30.7%) of D. citri nymphs. No parasitism was observed for densities lower than 800 wasps/ha and release radii above 15 m. The highest parasitoid dispersal radius and area were 18.04 m and 114.02 m2, respectively, when 3,200 wasps were released. Therefore, 3,200 wasps/ha arranged at 56 equidistant release points (approximately 57 wasps/release point) is the recommended protocol for biological control of D. citri in citrus groves.
To simplify the characterization of wood species, the Brazilian standard document ABNT NBR 7190-1 (2022) establishes the determination of mechanical properties employing the characteristic strength in the compression parallel to grain (fc0,k). This mechanical property is estimated using the linear relation given by the following expression fv0,k = 0.12·fc0,k Brazilian and European standard documents support the estimation of fv0,k using relations among properties. However, the European guidelines in the EN 384 (2019) have used the conventional characteristic strength in the static bending test (fM,k). Thus, this study aimed to investigate the efficiency of the ratio fv0,k = 0.12·fc0,k for adopting 30 hardwoods. The variance analysis results demonstrate the divergence among the experimental outcomes and those values estimated using the relation cited. Therefore, regression models at two parameters were considered to obtain more accurate estimates of fv0,k by adopting fc0,k, and fM,k as independent variables. Regarding the results, the geometric (R² = 80.80%) and linear (R² = 74.19%) models were the most accurate for the estimates of fv0,k in terms of fc0,k, and fM,k, respectively. This fact evinces the good accuracy of the models under consideration, which may provide a more rigorous structural design compared to the correlation currently prescribed by the ABNT NBR 7190-1 (2022). Keywords: Brazilian hardwood; characteristic strengths; Shear strength estimates
Objective to know the process of kangaroo care implementation and dissemination in the state of Santa Catarina. Method this is socio-historical research with a qualitative approach, with data collection carried out from January to November 2019, through interviews with 12 oral sources. Analysis was carried out in the light of genealogical analysis proposed by Foucault, with the help of Atlas.ti Cloud®. Results the process of kangaroo care implementation and dissemination in Santa Catarina happened from the breaking of resistance to the light of scientific knowledge, training and awareness that gradually captivated health professionals for the incorporation of new knowledge in neonatal care practice. Conclusion kangaroo care implementation as a public health policy configured a paradigm shift in neonatal care in Santa Catarina. Although scientifically supported, it took years to materialize in the state and still faces resistance. DESCRIPTORS: Kangaroo-mother care method; Infant premature; Neonatal nursing; Intensive care units; Neonatal; Health policies; History of nursing; Nursing
Gas-Shielded Tungsten Arc Welding (GTAW) was modified to a Flux-Cored-Double-Wire GTAW (FCDW-GTAW); in this technique, wires of different compositions are used simultaneously to obtain different microstructures. In the modified GTAW, automatic flux-cored double-wire was used with a combination of four different wires deposited in AISI1020 steel, allowing different microstructures. Pin-on-disk wear tests described by ASTM G99 was used to evaluate the wear coefficients of four hardfacing materials combining Fe-Cr-C, Fe-Cr-C-Nb, Fe-Cr-C-Mo-Nb, and Fe-Cr-C-Mo-Ti alloys. The combination of these wires resulted in a hypoeutectic microstructure with niobium and titanium carbides, with an average hardness of 650 HV 0.3 , and hypereutectic microstructures formed by different niobium contents, with a microhardness range from 820 to 1020 HV 0.3. The wear tests were performed without lubrication at room temperature, using a 6.0 mm diameter polished alumina sphere as a counter-body. The total distance covered was 1000 m with a speed of 0.1 m/s, a track radius of 6.0 cm, and an applied load of 10 N. Hardness, microstructure, wear coefficient, and wear mechanisms were compared. The results showed that wear resistance could be differentiated by the predominant wear mechanism: polishing for the hypoeutectic hardfacing and cracking for the hypereutectic ones.
Objective This study aimed to evaluate the stress resistance and growth performance of postlarval Nile Tilapia Oreochromis niloticus that were fed a diet supplemented with the yeast Saccharomyces cerevisiae as a probiotic. Methods Two groups were established in triplicate: fish that were given a diet supplemented with probiotic and a control group that received a diet without probiotic. Two‐hundred larvae were randomly distributed into each of six experimental units. Fish were fed six times daily. After 20 days, growth performance was determined, including survival, final weight, specific growth rate, feed conversion ratio, and effectiveness of sexual reversal. From these fish, 30 fingerlings (0.25 ± 0.02 g [mean ± SD]) per experimental unit were removed and used to perform stress tests ( n = 180), with 10 fingerlings being subjected to three stressors (i.e., transport, osmotic shock, and thermal shock). Result Fish that were fed the probiotic diet showed improved performance in final weight (16.6%) and survival (15.1%), as well as higher resistance to thermal (102.3%) and osmotic (27.5%) challenges, compared to control fish. Conclusion Saccharomyces cerevisiae improved growth performance and survival and had no effect on the rate of masculinization.
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Anderson Renato Vobornik Wolenski
  • Núcleo de Pesquisas Aplicadas a Construção Civil
S.L. Avila
  • Eletrotécnica
Clovis A Petry
  • Electronics Department
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  • Grupo de Pesquisa e Desenvolvimento em Sistemas de Telecomunicações
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Florianópolis, Santa Catarina, Brazil
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