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Reliability and validity of six-minute step test in patients with heart failure
(Universidade Federal de São Carlos, 2021-07-16)
Marinho, Renan Shida
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Jurgensen, Soraia Pilon
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Arcuri, Juliano Ferreira
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Goulart, Cássia da Luz
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Santos, Polliana Batista dos
Modelos de otimização para a cadeia de suprimentos de milho considerando mercado interno e exportação
(Universidade Federal de São Carlos, 2021-07-16)
Marins, Lara Beatriz Carvalho
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Morabito Neto, Reinaldo
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https://lattes.cnpq.br/4194801952934254
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https://lattes.cnpq.br/5335341156728492
The Brazilian agroindustry has been notable for its economic importance to the country and the world. However, their geographical dispersion and the interference of biological and climatic factors imply complex production systems. Specifically, corn production involves an agroindustry production chain whose agents must prioritize in offering high quality products at a low cost in order to remain competitive in the market. In this work, two optimization models for tactical planning of production and logistics are proposed to assist in the analysis and decision-making process in the supply chain in corn agroindustry. The models can be useful to indicate and quantify alternatives to reduce costs or maximize the revenue and profit margins of the chain members, seeking the economic/operational efficiency of the chain and taking into account flow restrictions, capacities, inventory balancing and different types of demand in the chain. These linear optimization models consider the domestic market for animal consumption, ethanol production and international markets. They are mainly oriented to support policies and decisions of public agents who have some control and can interfere in almost the entire chain, such as government agricultural agencies and secretariats, instead of companies or private associations in the corn sector that operate in only part of the chain. These agents can interfere in the chain, for example, through incentives and investments in different production and transport capacities in the chain, through changes in legislation and taxes that affect the chain, among others. To verify the consistency of the models and validate this optimization approach, the models were implemented in an algebraic modelling language and solved by an optimization solver, using real data collected from various sources. The obtained results show the potential application of the models for these analyses and the importance of considering some aspects that have not been much studied in the literature, such as some opportunities to use different modes of corn distribution and some impacts of the Tax on Circulation of Goods and Services (ICMS) on its production and logistics systems. Other important aspects explored in the scenario analysis are the identification of capacity bottlenecks and investment opportunities in the chain. In addition, it shows the competitive situation of production in Brazilian states according to current production, logistics and policies, among others.
Ocorrência, distribuição e atividade de cães (Canis lupus familiaris) na ARIE Mata de Santa Genebra (Campinas – SP), o seu impacto para a mastofauna nativa e propostas para controle
(Universidade Federal de São Carlos, 2021-07-16)
Feliciano, Renato D'Elia
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Barrella, Thomaz Henrique
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https://lattes.cnpq.br/2725441306439594
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Schlindwein, Marcelo Nivert
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https://lattes.cnpq.br/9690898537150950
The introduction of exotic species is an increasingly recurrent event in a context of expanding human occupation, destruction and fragmentation of habitats, alteration of natural ecosystems and globalization, with the impact of these introductions being considered the second largest cause of species extinction. In this sense, the domestic dog (Canis lupus familiaris) appears as an important character, considering that it is a cosmopolitan species, with great adaptive plasticity, generalist habits, introduced in most parts of the world and with several records of attacks and predation on native fauna in different continents. Thus, to deeply understand the dynamics of these dogs occurrences in natural areas, such as Conservation Units, from the evaluation of the places, periods and seasons of greatest activity is of crucial importance in order to understand this presence and its possible impacts on native fauna. In this study, we aimed to conduct an updated survey of the presence of domestic dogs within the Area of Relevant Ecological Interest (ARIE) Mata de Santa Genebra, focusing on the number of individuals, the areas of major activity and the interactions with non-flying native mammals species in the area. The sampling was done by collecting images with camera traps and field observation at twelve different points in the area, resulting in a sampling effort of 2754 camera-days. From 40-second filming, 316 mammal records were obtained which 88 of them documented the presence of dogs in the area. The analysis of the records allowed the identification of ten native mammals (Didelphis albiventris, Didelphis aurita, Sapajus nigritus, Dasypus novemcinctus, Cerdocyon thous, Procyon cancrivorus, Puma concolor, Leopardus pardalis, Silvivagus brasiliensis and Hydrochoerus hydrochaeris) and the Canis lupus familiaris (with 24 dogs distinct individuals identified). The data obtained were confronted with AIRE historical data recorded during the period from 2016 to 2020, in order to observe possible changes in the occupation of the area by domestic dogs. The results obtained during the sampling period pointed to a highest activity of dogs in areas of clearing and forest edge, with a beginning of advancement to areas inside the Conservation Unit and a preference for evening periods and rainy season. The results were also compared with the non-flying native mammals activity periods, as a way to assess the potential of dogs to use the same spaces and the same periods as the native fauna, leading to greater possibilities of direct contact between the dogs and the native mammals. The result was a similar occupation of spaces and periods by both domestic dogs and native fauna. Thus, based on the literature, it was highlighted which native mammals are more subject to the impacts of domestic dogs, such as, for example, by competition and infections, the Crab-eating fox (Cerdocyon thous), and by predation, the herbivores considered curious and that inhabit the border areas, such as the armadillo (Dasypus novemcinctus) and the tapiti (Silvivagus brasiliensis). Finally, proposals for controlling dogs and mitigating impacts were presented.
Uso de geotecnologias para o zoneamento ambiental da Sub-bacia Hidrográfica do Rio do Quilombo: subsídios voltados para área de expansão urbana do município de São Carlos – SP
(Universidade Federal de São Carlos, 2021-07-20)
Domingues, João Mateus Marão
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Stanganini, Fábio Noel
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https://lattes.cnpq.br/6774358264004600
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https://lattes.cnpq.br/4207327490280705
The physical and environmental aspects are constantly forgotten during the planning phase, which is why there is a triggering of environmental risks arising from public management problems. In the scope of municipal planning, the master plan has a fundamental role in defining strategic guidelines for the socioeconomic development of a city. Among the variety of urban tools within a master plan, it is found in the environmental zoning that aims to identify and delimit environmental units according to their physical characteristics and fragilities. The technological advent provided the development of Geographic Information Systems optimizing the processes of territorial planning, and evaluation of the interaction between the anthropic and physical methods. This work aims to support urban planning through the development of environmental zoning inserted in the urban expansion area of São Carlos, in the Hydrographic Sub-basin of Quilombo River. The distinction of environmental zones will be based on the subdivision of the territory according to its potentialities based on physical attributes. The methodological development based on this research has three stages, the first being defined by the diagnosis that has to analyze and structure spatial information; the second stage consists of the prognosis based at processing the information from the previous stage; and the third procedure for the integration and interpretation of the cartographic documents generated. The processing of geospatial data and geoprocessing operations were performed through the use of the QGIS program. To achieve the results, it was necessary to develop five cartographic documents, defined by the maps of altitude, slope, use and occupation of the soil, rocky substrate and unconsolidated material. With the help of map algebra, it was possible to elaborate two environmental zoning maps, estimated by the weighted and simple arithmetic averages. The suitability towards future urban infrastructure implementations in the area studied was classified according to suitability, varying between more or less favorable areas. Despite presenting favorable trends in the urban expansion region of São Carlos, it is seen that the same region is in the macro zone of protection of water sources. The territorial planning and the classifications obtained are fundamental for the management of rational occupation with a view to the sustainable use of the natural resources of the territory.
Desenvolvimento e políticas públicas: uma análise do pronaf investimento e custeio no município de Passos (MG)
(Universidade Federal de São Carlos, 2021-07-20)
Oliveira, Ana Paula Brito Silveira
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Carvalho, Joelson Gonçalves de
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https://lattes.cnpq.br/0141039743607067
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https://lattes.cnpq.br/7798135678293847
The interest of this work is to deepen the socioeconomic issue experienced by rural producers, seeking to incorporate the complexities that are and may become part of the execution of a public policy, in this case, Pronaf. For Maes (2006), access to credit services is a way to provide small entrepreneurs with the means to play an active role in the economy. Credit initiatives aimed at small borrowers have been increased in countries with the aim of increasing accessibility for people outside the traditional financial system. The objective of the research was to evaluate the effectiveness of the National Program for Strengthening Family Agriculture, from the perception of family farmers in the municipality of Passos (MG), in the cost and investment modality. We used, as a methodological strategy, qualitative research of descriptive exploratory nature, carried out through field research. After observing the statements, three analytical categories emerged: "Basic socio-productive characterization of the interviewed families", "Impact of Pronaf on the lives of producers" and "Possible scenarios, challenges and expectations of family farming in Passos", through which we analyzed the questionnaires carried out with rural producers. In addition to the analytical categories, and also based on the discourses extracted from the producers, it was possible to observe, in a more tenuous way, some thematic axes (nine), which, regardless of not generating sufficient convergence for a more categorized analysis, were fundamental for the construction of the general notes. The history of the farmers highlighted here is not limited to data or numbers that prove or show improvements or contributions that Pronaf has generated in the lives of these producers, but also reflects the challenges faced.
Histórias do brincar: um estudo com adultos e suas trajetórias
(Universidade Federal de São Carlos, 2021-07-21)
Sartori, Gabriela Dias
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Alves, Fernando Donizete
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https://lattes.cnpq.br/3812723309905378
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https://lattes.cnpq.br/6107856518768666
In the midst of a meritocratic, capitalist, productivist scenario, we bring the discussion and reflection about playing as an intrinsic experience of the human being. The objective of this research was to understand how a play experience is significant for adults in their life trajectories. The participants were 24 adults, 12 from Brazil and 12 from Spain, linked to different educational contexts (formal, non-formal and informal), whether through teaching, research, projects, groups of friends who get together for some kind of activity related to playing, interface with the areas of leisure, school education and art. The research question that moved this work was: What is the meaning of playing in adults' lives and how does this reflect on their life and professional experience? This study has a qualitative methodological approach and data collection was carried out through interviews. The theoretical framework dialogues with data analysis, addressing the formation of society, human beings and learning intertwined with playing, in the midst of their life trajectories. Data analysis occurred according to content analysis, respecting the subjects that emerged from the participants, dialogically approached with contributions from authors within such themes. In the narratives transformed into monads, we find playing adults, who conceptualized playing as it exists and manifests itself, in a timeless manner and as an experience of learning generated and re-visited throughout life. The monads addressed the themes: time, work, ludic elements, family, freedom, permanent learning, reflections on fun, encounters and bonds, conceptualizing the play, toys, and the record of what these adults play. The findings of playing as a form of bonds, relationships with oneself, with the other and with the world in a permanent way are significant. Thus, this research intended to contribute to the area of Education by proposing discussions on the importance of playing as a perennial and formative activity in human experience.
Estudos sobre A-identidades polinomiais
(Universidade Federal de São Carlos, 2021-07-21)
Naves, Fernando Augusto
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Talpo, Humberto Luiz
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https://lattes.cnpq.br/1674689444257254
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https://lattes.cnpq.br/2387898216530288
The aim of this work is to study A-identities in associative algebras. More specifically, we study the A-identities of the tensor square of the unitary and infinite dimensional Grassmann algebra E, denoted by R, and we find the minimum degree of an A-identity of R. Due to Kemer's Tensor Product Theorem, in characteristic zero the algebras M_{1,1}(E) and R are PI-equivalent. Thus, in several moments we deal with the algebra M_{1,1}(E). In a second moment, we study the Z_2-graded A-identities of M_{1,1}(E). In this sense, we describe the set of such identities and calculate its respective graded A-codimensions.
Carrier dynamics of low-dimensional semiconductors: from quantum wells and quantum dots to resonant tunneling devices
(Universidade Federal de São Carlos, 2021-07-22)
Lopez, Andrea Naranjo
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Teodoro, Marcio Daldin
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https://lattes.cnpq.br/5602634309535528
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https://lattes.cnpq.br/7691199952523844
This thesis aims to study heterostructures and devices that play a fundamental role in modern nanoelectronic technologies, focusing on group III-V semiconductor materials, especially arsenide-based systems, for photodetection applications. The area under discussion deals mainly with phenomena related to the effects of quantum confinement of the charge carrier energetic states that arise when the dimensionality is reduced. It is also discussed the macroscopic implications of this confinement, mainly on the optical and transport properties of the studied heterostructures. This work will address the effects of heterostructures with quantum wells and the influence of introducing quantum dots within their architecture. Beginning with polarization-resolved photoluminescence in pure GaAs quantum wells to get a first and better understanding of the properties of this basic system, especially its excitonic complexes. The results show excitons, biexcitons and trions emissions tuned by temperature, excitation power and external magnetic fields. Excitons and biexcitons show essential differences in their dependence on the external field. While the Zeeman splitting of biexcitons is monotonically dependent on the magnetic field, with a nearly constant g-factor, the behavior of the exciton energy division is not monotonous, involving a signal inversion as a function of the magnetic field. Remarkably, a trion resonance emergence in a finite magnetic field appears at low power excitation and sigma+ polarization. The non-trivial dependence of the energy levels with the external magnetic field, together with the particular polarization trion emission, denotes an intricate exciton and trion dynamics, which a set of coupled rate equations can describe. The theoretical approach used shows that a rapid spin-flip process could lead to an asymmetric spin emission and contrasting spin dynamics of the exciton complexes induced by their charge. Once the basic system has been developed and studied, the ideas and concepts in systems with more potential technological applications are related. In this context, one of the most widely investigated semiconductor devices is the resonant tunneling diode, not only because it performs optoelectronic responses strongly dependent on external parameters such as voltage, incident light and temperature, also due to the vast physical phenomena that it allows to address and study. Since excitation, accumulation, and charge transport control are the operating parameters and responsiveness of the device, it is critical to study how these three processes are intertwined. Here, the electroluminescence of these diodes has been used to investigate the dynamics and charge carrier accumulation through the combination of magneto-electroluminescence and magnetotransport measurements. Magneto-electroluminescence results shed light on blind spots where magnetotransport media are no longer effective and enabling the assessment of intrinsic charge carrier transport processes without the need to illuminate the sample. Finally, a resonant tunneling diode with an integrated InGaAs quantum dot layer is studied, seeking the benefit derived from the main characteristic of this type of diode to carry out photodetection; the sensitivity of the tunneling current to changes in the local electrostatic potential. In principle, this could lead to the detection of individual photons, i.e., photon numerical resolution. Transport, photocurrent and electroluminescence spectroscopy results reveal that the accumulation of charge carriers is maintained by the quantum dots, demonstrating that the proposed structure is susceptible to capturing individual photoexcited holes. A theoretical explanation is proposed, where the product of different voltage-dependent functions defines how the accumulation of charge carriers induced the voltage change and aims to quantify the single-photon detection process.
Influência do agente precipitante na síntese de catalisadores Cu-ZrO2 aplicados na conversão de glicerol a acetol e propilenoglicol
(Universidade Federal de São Carlos, 2021-07-23)
Corrêa, João Vítor Soares
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Chimentão, Ricardo José
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https://lattes.cnpq.br/3079491942548735
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Santos, João Batista Oliveira dos
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https://lattes.cnpq.br/0285313473901330
Biodiesel production by transesterification reaction generates large amounts of glycerol as a by-product. The development of chemical routes to use glycerol as raw material for products with high added value is essential to foment the biodiesel industry. Therefore, acetol emerge as an interesting product derived from glycerol that can be an intermediary for other chemical products, such as propylene glycol, pyruvic acid, and propionic acid, among others. In this work, the study of the heterogeneous catalytic conversion of glycerol to acetol and other products of interest was evaluated. For that, copper and zirconium catalysts were synthesized with different compositions by co-precipitation method, which evaluated the influence of precipitating agents: triethylamine (Et3N), sodium hydroxide (NaOH), and sodium carbonate (Na2CO3). The materials were characterized by X-ray diffraction, temperature-programmed reduction, N2 physisorption, selective Cu oxidation by N2O, NH3 temperature-programmed desorption, and in situ infrared analysis with pyridine. Characterizations results showed that, in addition to the mass composition, the precipitating agent used affected the physicochemical properties of the catalysts and, consequently, their catalytic performance. Reactions tests were carried out in a batch reactor and after previous evaluation, the reaction parameters were fixed at T = 180 °C, stirring at 800 rpm, V = 30 mL (80% aqueous glycerol(m/m)), during 1 h, with an initial pressure of 1 atm (N2) and 300 mg of catalyst. The catalysts showed activity for the dehydration reaction of glycerol to acetol and subsequent in situ hydrogenation to propylene glycol without adding H2 to the reaction medium. It was observed a correlation between the concentration of acidic sites and the selectivity in the conversion of glycerol to acetol, propylene glycol, and other products. Furthermore, the strength distribution of acidic sites, particle size, and textural properties, such as porosity can regulate the selectivity of the reaction. Finally, the reuse tests showed moderate loss of catalyst activity, although the used catalysts did not go through a reactivation step between each reaction.
Análise do movimento do saque no tênis de campo por meio de processamento de imagem - diagnóstico visando à melhoria de desempenho
(Universidade Federal de São Carlos, 2021-07-24)
Valim, Bruno
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Montagnoli, Arlindo Neto
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https://lattes.cnpq.br/2903750902988624
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https://lattes.cnpq.br/0599043251342979
The present work consists in evaluating the movement of the serve in tennis, through video image processing using the Cinemetria software to render an 3D avatar. The software in C++ programming with specific algorithms for biomechanical analysis of movement, and it proposes to process the data automatically and correlate the kinematics with a specific protocol to measure and quantify key joint points in the human body, perform image acquisition without specific markers in the game scenario itself in such a way that the player can move without interference from special equipment. In addition to image processing, the goal is to identify the mechanical failure and diagnose the movement of the serve with the ball in real game time. The computer visualization structuring the motor gesture through the display of an Avatar rendered in 3D, allows the coach or player to obtain the information and provide a precise diagnosis of the service movement, in addition to analytical feedback for the service training, facilitating correction of the motor gesture, preventing players from training wrongly, and without making an excessive repetitive effort that could impair the service movement, preventing pain and joint injuries. Through the digital signal processing of the serve images, it is possible to obtain specific information by structural temporal modeling of the biomechanics of the serve in tennis, determined through kinematics the technical standards for the variables of the open movement of the serve and to analyze the motor gesture in all segments of levers, planes and anatomical axes of the player.
Aspectos fisiológicos e nutricionais em mudas de citros infectadas por HLB e submetidas a diferentes disponibilidades hídricas
(Universidade Federal de São Carlos, 2021-07-24)
Lavorenti, Jéssica Aparecida Lara
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Mattos Júnior, Dirceu de
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https://lattes.cnpq.br/8599356494482170
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Soares, Marcio Roberto
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https://lattes.cnpq.br/6337462438517339
Citriculture contributes with the largest volume of Brazilian fruit production, obtained from the high productivity of the orchards, as a result of the adoption of technologies such as planting densification, soil fertilization, and irrigation. However, the increase in the incidence of phytosanitary problems, especially huanglongbing (HLB), puts pressure on production costs and leads to a reduction in the sustainability of the sector. The causal agent of HLB is a phloem-restricted bacterium (Candidatus Liberibacter) that impairs the absorption of water and nutrients. Despite the existence of recommendations aimed at reducing plant susceptibility to HLB with better irrigation and soil fertilization management, little is known about the relationship between water availability and physiological and nutritional responses in citrus plants infected with HLB. This study aims to understand the physiological, nutritional and biochemical changes observed in early stages of HLB infection in 'Valência' orange (C. sinensis) plants grafted onto 'Citrumelo Swingle' [Citrus paradisi X Poncirus trifoliata (L.)], subjected to different water supply conditions. The experiment was carried out in pots in a greenhouse and the experimental design used was completely randomized (DIC), in a split-plot scheme, with two infection conditions (HLB+ and HLB-) and two water supply conditions [full irrigation (FI) and deficit irrigation (DI)]. At 75 days after transplanting, the following parameters were evaluated: net photosynthetic rate, transpiration, stomatal conductance, intrinsic efficiency in water use, leaf area and mass, bacterial title in leaves and roots, starch and soluble sugar contents, contents of nutrients and dry mass of leaves, branches, and roots. The results were analyzed by Student's t test at 5% probability. Plants infected with HLB and subjected to irrigation deficit showed lower starch accumulation, higher content of soluble sugars in leaves, higher water use efficiency and higher nutrient content in the shoot. These responses in plants under water deficit were associated with a decrease in bacterial population in previously infected plant parts, as well as a deceleration of disease progress to new canopy parts that developed after infection. The decrease in the bacterial population under more restricted conditions of water supply is important information for future management practices with species that may be tolerant to HLB, given the series of physiological, biochemical and nutritional responses under irrigation deficit.
Aproximações entre o ensino de filosofia e a agroecologia: repensando a questão agrária e o agronegócio no Brasil através da perspectiva histórico-crítica
(Universidade Federal de São Carlos, 2021-07-25)
Figueiroa, Tiê Nogueira
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Bezerra Neto, Luiz
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https://lattes.cnpq.br/4809080593333472
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https://lattes.cnpq.br/9784363409924987
This paper has as object of study the teaching of philosophy through a critical-philosophical view at the model of the Brazilian rural development in order to discuss and comprehend the relationships between the in natura production method of the food we consume, with the influence of agriculture (and livestock) in the structuring of Brazilian society and its keeping, as well as the impacts on society and the environment. In order to reach this wide objective we are going through the following itinerary: understanding the historic process of land occupation as though as the formation of Brazilian society; comprehending the influence forces of the agribusiness in the different sectors of Brazilian society; thinking about the environmental damage caused by hegemonic agriculture; and offer the agroecology as a solution that also contemplates the need of a land reform; finally, thinking of the philosophy teaching through critical-historical pedagogy as an important part of this process of awareness and politicization of the agriecological questions for a social praxis of high school students. By the end of the research we will offer conclusions referring to the itinerary considering the application of a questionnaire with the students and the practice of this route in the philosophy classes in the Prof. Roque Lelo State School in Caconde-SP.
Propriedades citotóxicas de complexos de Cu(I)-Trifenilfosfina com ligantes aciltioureias ou naftoquinonas
(Universidade Federal de São Carlos, 2021-07-26)
Leite, Celisnolia Morais
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Batista, Alzir Azevedo
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https://lattes.cnpq.br/6469642481998660
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https://lattes.cnpq.br/9638881050186865
In this work, the synthesis, characterization, and evaluation of the cytotoxic activity of sixteen Cu(I)/Triphenylphosphine complexes containing the acylthiourea or naphthoquinones ligands are presented. The complexes were divided into two series based on the classes of the ligands used. The first series is composed of the neutral complexes of general formula [Cu(Ln)(PPh3)2] (1-6) and monocationic complexes of general formula [Cu(Ln)(PPh3)2]NO3 (1a 6a), where Ln= acylthiourea and PPh3= triphenylphosphine. The second series is composed of the neutral complexes of general formula [Cu(NQn)(PPh3)2] (1b 4b), where NQn= naphthoquinone and PPh3= triphenylphosphine. All complexes were characterized by different techniques such as elemental analysis, molar conductivity, infrared absorption spectroscopy, 1D and 2D nuclear magnetic resonance (31P{1H}, 1H and 13C{1H}), mass spectrometry, and X-ray diffraction. In the 13C{1H} NMR spectra, the complexes (1-6) stood out by showing the unusual chemical shift pattern, for the C=O and C=S carbon atoms of the acylthiourea ligand after bidentate (S, O) and anionic coordination. The experimental results were supported by DFT studies that suggested that relativistic effects strongly influenced the NMR protection constants of the light atoms due to coordination to the heavy atom Cu. The stability of the complexes in the cell culture medium was investigated and all the complexes were shown to be unstable, directly influencing the biological results obtained. The in vitro cytotoxicity of the complexes was determined in the breast (MCF7 and MDA MB-231) and lung (A549) tumor cell lines and in the corresponding non-tumor breast (MCF-10A) and lung (MRC-5) cell lines, and all complexes were actives exhibiting IC50 values in the same range in different cell lines. The compounds were more active than the free ligands and the precursor salt of the complexes in different cell lines, showing that even unstable complexes are relevant for the cytotoxic action. In general, the acylthiourea series complexes, 1 and 1a, were able to change the morphology of MDA-MB-231 cells, inhibit colony formation, showing cytotoxic and cytostatic effects on this cell line, significantly altering the cytoskeleton of cells, reducing the density, and promoting the condensation of the F-actin filaments. They promoted the increase of cells in the fragmented DNA region (sub-G0) and induced cell death by apoptosis. The complexes of the naphthoquinone series, 1b, and 4b, altered the morphology of MDA-MB-231 cells, inhibited colony formation at concentrations higher than the IC50, and were able to inhibit cell migration. Finally, the compounds synthesized and characterized in this work are relevant reports of copper (I) complexes with cytotoxic properties in different tumor cell lines with potential for future studies in vivo models.
Innovation ecosystems and strategy in the COVID-19 crisis
(Universidade Federal de São Carlos, 2021-07-26)
Oliveira, Wesley da Paixão de
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Guimarães, Márcia Regina Neves
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https://lattes.cnpq.br/9250214706491925
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Silva, João Eduardo Azevedo Ramos da
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https://lattes.cnpq.br/3823047207711289
The COVID-19 pandemic is a disturbance that forced enterprises to rethink their strategies and ecosystems to keep running. Nevertheless, there is a lack of prior register to show the best policies to adopt in such circumstances. Hence, researchers and practitioners must comprehend how companies are responding to this unprecedented health crisis. Furthermore, it is of equal importance to comprehend the pandemic consequences on ventures’ strategies and ecosystems. In this sense, the research identified how four ventures handled such a situation. Through a multiple and holistic case study, supported by exploratory and qualitative approaches, the research provided a detailed description of their competitive strategies, innovation ecosystems, and the adopted measures against the crisis. The main findings were as follows: (i) The pandemic affected the studied ventures and ecosystems at different levels. The crisis severely hit the approached enterprises and ecosystems from the event and consultancy industries, especially the former. For example, the former entirely ceased their activities for a while, impacting the ecosystem activity flow. However, the pandemic boosted the businesses of the organizations and ecosystems from the telehealth and medication industries. For example, the medication case showed no change in its ecosystem composition and further capitalized from new projects that emerged due to the COVID-19 disruption. (ii) The ventures proposed changes related to the value proposition, interaction process, and activities and information flow across the ecosystem to keep running. For example, those severely affected by the COVID-19 succeeded in delivering their solutions entirely online (the consultancy industry case) or avoiding crowds (the event industry case). Further, those less affected benefited by adopting work from home (the medication industry case) or serving occupational health and safety care entirely online (the telehealth industry case). (iii) The enterprises employed these modifications mainly by adopting (the medication and telehealth industries cases) or increasing (the event and consultancy industries cases) digital solutions internally and crosswise the ecosystems. Therefore, the studied cases' competitive strategy and innovation ecosystems goals have not changed due to the pandemic: what changed was the means to achieve these objectives to respond to the crisis and keep moving forward.
Co-cristalização da curcumina com d-manitol: caracterização e aplicações sobre larvas do Aedes aegypti (Linnaeus, 1762)
(Universidade Federal de São Carlos, 2021-07-27)
Garbuio, Matheus
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Inada, Natalia Mayumi
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https://lattes.cnpq.br/3595196074265255
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Bagnato, Vanderlei Salvador
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https://lattes.cnpq.br/4947860249518663
The search for new compounds to eliminate Aedes aegypti mosquito larvae is a strategy used by several researchers. Brazil, for example, has been facing major problems due to the high number of cases of arboviruses transmitted by the mosquito. In order to reduce the speed of selection of populations resistant to chemical insecticides, photodynamic inactivation (IFD) in Ae. aegypti has been used as an alternative. Curcumin (CUR), a pigment extracted from the roots of Curcuma longa has been discovered as a potential photolarvicide. Despite advances in this area, CUR still has some limitations, such as its low stability, bioavailability and water solubility. Thus, the objective of this study was to develop formulations based on CUR and D-mannitol via co-crystallization, in order to obtain an improvement in their solubility and, consequently, enable their application in Ae. aegypti. The characterization of the formulations carried out: absorption spectroscopy (UV-vis), infrared spectroscopy (FTIR), fluorescence spectroscopy, confocal microscopy, solubility tests at pH 2, 7 and 11, the degradation test (of the most effective formulation) in fluorescent lamps (0.5 mW/cm²) 24h. For efficacy trials, the formulations were used at concentrations between 0.00625; 0.0125; 0.025; 0.05; 0.1; 0.2; 0.4; 0.8 mg.L-1 with 18W white fluorescent lamps, 0.5 mW/cm2 irradiance and after 24h larvae mortality were recorded. The determination of the internalization and elimination time of the formulations in the digestive system of Ae. aegypti through optical microscope images. Acute toxicity tests and simulated field application (of the most effective formulation) were carried out. And the analysis of microbiota activity in artificial breeding waters and in the simulated field where the formulations were placed by counting the log of colony forming units. Among the formulations, formulation 1 had the best solubility, followed by 2, 3 and 4, however, in relation to photolarvicidal efficacy, formulation 3 had the best performance, with a LC50 value of 0. 01 mg.L-1, in addition, had the shortest internalization time and the longest elimination time, 30 minutes and 8 days, respectively. With its best results, formulation 3 was chosen as the most effective, in addition to presenting an environmental safety, as it does not present mortality in acute ecotoxicity tests and maintains its persistence in the field for 14 days in light and 6 days in the shade.
Treino funcional de alcance e controle de tronco em lactentes pré-termo moderados a tardios: ensaio clínico randomizado e controlado
(Universidade Federal de São Carlos, 2021-07-27)
Sato, Natália Tiemi da Silva
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Cunha, Andrea Baraldi
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https://lattes.cnpq.br/8413239950848240
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Tudella, Eloisa
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https://lattes.cnpq.br/3207258034860219
Introduction: Moderate to late preterm infants may present delays on the onset and development of those abilities due to possible complications of prematurity. Studies on specific abilities such as reaching and positioning experiences have shown a positive effect to optimize the reaching performance, head control and motor development in full-term and preterm infants. However, due to the relationship between manual abilities and trunk control, it is relevant to develop an intervention that emphasizes on the positioning experiences and reaching to enhance the motor development of infants at biological risk. Objective: to verify the feasibility and effect of early intervention programs on gross motor performance, trunk control and reaching performance in moderate to late preterm infants in reaching emergence. Methods: Preterm infants at the onset of reaching ability (Mean=4.36, SD=0.54 months) were randomized assigned into two groups: Functional Reaching and Trunk Control Training (experimental group-EG) and Positioning social training (control group-GC). Infants were assessed into 4 visits: 1) pre-test; 2) post-intervention 1; 3) post-intervention 2, and 4) follow-up. All assessments were performed by a blinded evaluator. The Functional Reaching and Trunk Control Training, consisting of functional activities was performed by a pediatric physical therapy and parents at home. The Positioning social training, consisting of only static positioning experiences, was performed only by parents. Parents used a daily log for both trainings (dose, frequency, duration and infant’s behavior), and responded to a parent feedback questionnaire. For the feasibility variables of early intervention programs, t-test for independent samples and the Chi-Square test were performed. For gross motor performance, the Mann-Whitney test was applied. For the segmental trunk control, the Chi-Square test was applied, and for trunk and reaching kinematics variables, the mixed linear model was used. Results: there were no differences of feasibility outcome measures for both intervention programs. Parents provide a positive feedback about both programs. At the follow-up, the EG presented higher total gross motor score than CG. Both groups improved on motor performance across time. There were no significant differences between groups in the segmental trunk control, trunk and reaching performance, but there were substantively important effects (clinically relevant). After training and at follow-up, EG infants presented higher trunk movement and smoother and faster reaching than CG. Conclusion: Both early intervention programs were considered feasible and both groups showed improvement on gross motor performance, trunk control and reaching performance across time. Substantively important effects were found, favoring Functional Reaching and Trunk Control Training, which can be an efficient early intervention strategy for clinicians.
Evolução microestrutural e propriedades mecânicas das ligas Al-10%Si-0,45%Mg e Al-10%Si-1,0%Mg
(Universidade Federal de São Carlos, 2021-07-28)
Gandolfi, Maressa
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Spinelli, José Eduardo
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https://lattes.cnpq.br/8882038118634925
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https://lattes.cnpq.br/3579243272425225
Al-Si alloys with high silicon (Si) content are widely used in aerospace, automotive, microelectronics, among others. In this context, the Al-10 wt.% Si alloys with the addition of Magnesium (Mg) are alternatives that arouse interest for processing in permanent molds, by lost wax, by high pressure die-casting and by additive manufacturing. Due to growing interest, there are necessary more in-depth studies of the interrelationships between solidification thermal parameters, microstructural parameters and mechanical properties of the Al-10 wt. % Si-Mg alloys, both due to the scarcity of these data in the literature and due to the importance of this knowledge in the pre-programming related to foundry processes. In this sense, a study for the conditions of slow and moderate solidification was carried out through this Master's proposal. Through transient directional solidification experiments a wide range of dendritic scale variation was obtained for both Al-10 wt.% Si-0.45 wt.% Mg and Al-10 wt.% Si-1.0 wt.% Mg alloys, with primary and secondary dendritic spacings, 1 and 2 ranging from 76 m to 360 m and from 17 m to 38 m, respectively. The interdendritic phases detected were Mg2Si with Chinese Script morphology and Si with lamellar morphology, with a higher fraction of Mg2Si for the alloy containing 1.0 wt.% Mg. Thanks to the higher fraction of refined Mg2Si particles, in addition to greater refining and complexity of the dendritic network (smaller 2), the Al-10 wt.% Si-1.0 wt.% Mg alloy achieved greater mechanical strength and ductility compared to the Al-10 wt.% Si-0.45 wt.% Mg alloys. The samples of the Al-10 wt.% Si-1.0 wt.% Mg alloy with 2 of 16 m show the best balance of tensile properties with ultimate tensile strength limit of 220 MPa, yield tensile strength of 142 MPa and elongation-to-fracture of 5%.
Cultura e Interculturalidade em movimento no ensino de Português Língua Estrangeira: um estudo bibliográfico-documental
(Universidade Federal de São Carlos, 2021-07-28)
Yonaha, Tábata Quintana
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Viana, Nelson
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https://lattes.cnpq.br/6252579012192711
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https://lattes.cnpq.br/4076862793928173
This dissertation is the result of a qualitative bibliographic research design. The concepts of culture and interculturality in the Foreign Language Teaching (henceforth FLT) are investigated under the scope of Applied Linguistics. Its main aim was to gather theoretical contributions on these concepts, to relate and discuss them from a critical perspective following an interpretative-constructivist approach. The reference sources for the development of this research were primary (books, articles, technical texts) and tertiary (databases). We present primary concepts about culture in the language studies area (KRAMSCH, 2011; 2017). In addition, we develop a historical overview of the relationship between language and culture based on the works of Risager (1998) and Kramsch (2001; 2006; 2007; 2010; 2011). Another concept presented is culture under different perspectives based on the contributions of Holliday (2012) and Abdallah-Pretceille (2006). This work discusses the most widely used intercultural models in academic research on this theme (BYRAM, 1998; BENNETT, 1998; DEARDORFF, 2009) through analyzing their main characteristics. The in-depth analysis of these models has the emergency of an epistemic turn of popular knowledge and scientific knowledge supported and advocated in Walsh's decolonial proposals (2008; 2010). Issues as power, exclusion, subordination of identities, knowledge, languages and systems are scrutinized in Walsh’s work, as well as in the works of Dervin (2006; 2017). The author problematizes solid conceptions of culture and interculturality while taking the critical interculturality proposals of Tubino (2005) and Candau (2016) into consideration. Seeking, with this discussion, to contribute to the visibility and expansion of this theme in the teaching of Portuguese as a Foreign Language (PFL), we focused on the Celpe-Bras exam due to its washback effects into this field, analyzing guiding documents for the face-to-face interaction of the evaluation process, namely in relation to the notions of culture and interculturality embodied in aspects of the Provocative Elements and Interaction Scripts. We consider that the results of this research can contribute to discussions and, potentially, to the practices of PFL teachers, in initial and in continuous professional development, in a reflexive way, since the pedagogical alternatives presented emphasize the importance of breaking away from solid constructions of culture ( DERVIN; MACHART, 2015) and to question crystallized senses and debatable certainties of knowledge (MOITA LOPES; FABRÍCIO, 2015) about cultures and interculturality in the context of teaching in this area.
Uso de extrato de canela, extrato de cravo e hipoclorito de sódio no controle de Fusarium oxysporum f. sp. lycopersici e Alternaria alternata
(Universidade Federal de São Carlos, 2021-07-28)
Carmello, Camila Rodrigues
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Rosa-Magri, Marcia Maria
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https://lattes.cnpq.br/4166319985147604
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Cardoso, Jean Carlos
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https://lattes.cnpq.br/3681181863704059
The tomato crop is very sensitive to phytosanitary problems, among the fungal diseases that affect the crop, the Fusarium wilt caused by Fusarium oxysporum f. sp. lycopersici and the black spot, caused by Alternaria alternata. The use of pesticides is one of the main ways to manage pests and diseases in tomato crops, making control measures based on systematic applications of fungicides following a calendar of weekly applications. While the application of fungicides brings benefits to the productivity of horticultural crops, their use has been restricted by environmental risks and the greater demand for food without the presence of residues of these substances. In this context, the use of natural products from plants and already used as food can be an alternative form of control. Thus, this work aims to evaluate the in vitro growth inhibition potential of different pathogenic races of Fusarium oxysporum f. sp. lycopersici (causer of fusarium wilt) and Alternaria alternata (black spot), by the use of aqueous extract of cinnamon and aqueous extract of clove, in addition to the use of sodium hypochlorite solution, as well as its application to reduce symptoms of black pinta on tomato fruits in post-harvest. For this purpose, the work was divided into two chapters, where in vitro tests were performed in the first chapter to observe the potential of the aqueous extract of cinnamon and sodium hypochlorite in the control of Alternaria alternata and the three main races of Fusarium oxysporum f. sp. Lycopersici. In the second chapter, the effects of the aqueous extract of cinnamon and the aqueous extract of clove on the control of Alternaria alternata in vitro and post-harvest of tomatoes were treated. Complete growth inhibition of the three races of Fusarium oxysporum f. sp. lycopersici and Alternaria Alternata only when using sodium hypochlorite from a concentration of 3%, and a partial inhibition with the use of cinnamon extract. Both, cinnamon extract and sodium hypochlorite solution, at concentrations above 2%, reduced IVCM values. Total inhibition of Alternaria mycelial growth under in vitro conditions was obtained using 5% clove extract. The combination of cinnamon and clove, both at 2.5 and 5%, also enabled complete inhibition of mycelial growth. In addition to the effect on mycelial growth, it was also possible to verify the inhibition of spore germination and control of the fungus in the post-harvest of tomato fruits.
Análise clínica comparativa da terapia sinérgica de ultrassom e laser e terapias isoladas para tratamento da fibromialgia
(Universidade Federal de São Carlos, 2021-07-29)
Bruno, Juliana da Silva Amaral
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Aquino Junior, Antonio Eduardo de
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https://lattes.cnpq.br/8720193315570177
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Bagnato, Vanderlei Salvador
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https://lattes.cnpq.br/4947860249518663
Fibromyalgia is a diffuse and chronic musculoskeletal pain syndrome that affects mainly women. In Brazil, it is present in 2.5% of the population and, in addition to the generalized painful sensation, other disorders are associated with non-restorative sleep, fatigue, cognitive changes, anxiety and depression, among others. Today, there are no specific exams for diagnosis due to lack of knowledge of its etiology, treatments are guided by symptoms. Treatments can be pharmacological and/or non-pharmacological. However, physiotherapy is present in the area of health sciences to reduce painful and inflammatory episodes and to recover and maintain physical integrity. The use of equipment such as therapeutic ultrasound is the most used resource in physical therapy for inflammatory disorders of the musculoskeletal system. Another piece of equipment, which has been gaining attention in rehabilitation, is the low-intensity laser, which has multiple effects and indications in a punctual and even systemic way. In this sense, a researcher from the IFSC / USP joined together as two treatment techniques in a single equipment, offering patients a synergistic ultrasound and laser therapy. With the technological advance of the device and analyzing the study by Albrecht et al (2013), which identified the increase in nerve endings around blood vessels in the palms of the hands, specifically in the hypothenar region, it was what motivated us to start the study with fibromyalgia patients applying the treatment on the palms of the hands. Thus, the aim of this study was to analyze the effects on pain, quality of life and sleep quality, depression, anxiety and physical activity in these patients, separating the study into three treatment groups: Laser Group, Ultrasound Group and Ultrasound + Laser Group, being taken in the immediate pre- and post-treatment, and 30 days after the end of the treatment. The application was carried out with the prototype that allows the use only of laser or ultrasound, or combining the two techniques. The intervention protocol was carried out with 10 sessions in total, at a frequency of 3 times a week on alternate days, and the application time was 3 minutes in each palm, in all groups. The results exceeded expectations. The isolated therapy groups, laser and ultrasound, had similar results, less than 70%, in the immediate post-treatment, but the group that received synergistic therapy had a result of 92.32% in pain reduction. Quality of life in the synergistic therapy group optimized 72.37% and isolated therapies below 59%. Thus, the Ultrasound + Laser Group, 30 days after the end of treatment, showed 100% and 98.23% efficacy of the final results, in relation to pain and quality of life, respectively. It is concluded that the synergistic effect of ultrasound and laser on the palms of patients with fibromyalgia have satisfactory results corresponding to improvement in pain and quality of life in the immediate and medium-term post-treatment. Furthermore, these results directly influence the reduction of anxiety and depression, and consequently, improve the quality of sleep and the ability to perform physical activity.