Browsing by Issue Date, starting with "2021-03-17"

Filter results by year or month

Now showing 1 - 20 of 9619

Análise de analogias em livros didáticos de química envolvendo o conceito de modelos atômicos
(Universidade Federal de São Carlos, 2021-03-17)
Sabatine, Mirela de Lima
;
Benedetti Filho, Edemar
;
https://lattes.cnpq.br/5963704923612696
;
https://lattes.cnpq.br/8424944939651884
This work describes a research involving the use of analogies related to scientific development and its use in the classroom in order to approximate the scientific concepts of students through their previous knowledge. Following the methodology involving the analysis of analogies proposed by Curtis and Reigeluthe (1984) and the TWA model (Teaching with Analogies) by Harrinson and Treagust (1993), the analogies were analyzed, focusing on Atomic Models and Periodicity, presented in five textbooks adjusted in the National Textbook Plan for the 2018 triennium.
A influência das mídias sociais no comportamento de compra de produtos de beleza dos consumidores de Sorocaba-SP.
(Universidade Federal de São Carlos, 2021-03-17)
Ribeiro, Fernanda Toshimi Sampei
;
Oliveira, Milene Tódero de
;
Piato, Éderson Luiz
;
https://lattes.cnpq.br/1439984077907071
;
https://lattes.cnpq.br/5652988643962416
The use of social networks has intensified in recent years, allowing an evolution in the media focused on consumer goods. The presence of digital influencers also plays an important role in the dissemination of brands and products, offering a closer and more reliable relationship with the public. The objective of this research is to analyze the influence of social media on purchasing behavior, exclusively for beauty products, consumers in the city of Sorocaba-SP. Through a quantitative research it was possible to define the profiles and habits of consumers in the city, in addition to understanding how brands and influencers use social media to generate purchase incentives. The information was analyzed statistically considering the influence between social media and purchasing behavior. For the sample analyzed, it was identified that product recommendations and reports by influencers impact the purchase process, a direct influence on decision making for the purchase of products in this segment. In addition to brand loyalty, the public also becomes receptive to try new products and how networks become a communication facilitator for an exchange of experiences and recommendations.
Planejamento ambiental de um corredor ecológico com base em evidências científicas
(Universidade Federal de São Carlos, 2021-03-17)
Bigato, João Pedro Arantes
;
Lopes, Luciano Elsinor
;
https://lattes.cnpq.br/6504793265492545
;
https://lattes.cnpq.br/2399479561534944
This research has as main objective to generate reflections on the environmental planning process of ecological corridors evidence-based published through the action research methodology. This is the UFSCar ecological corridor, which is foreseen in the last update of the Campus Master Plan, held in 2013. The action research model was used as the main methodology. Criteria for bibliographic analysis of scientific evidence were developed. Regarding the information obtained through scientific evidence, for the groups of organisms affected by the ecological corridor, it is believed that plant restoration, based on species native to the region, favors all groups of organisms. Regarding the type of plant restoration, studies point to passive restoration, indicating only the removal of eucalyptus which, in turn, can be kept in small fractions, which can function as nucleating species for restoration. Regarding the control of brachiariae, the result is divided between the use of chemical control or mechanical extraction, indicating a study that tests which is the best option. The roads are shown to have an impact on biodiversity conservation, but few studies address the effect of firebreaks as an object of study, requiring practical proof. Environmental monitoring of all management actions is essential, using different instruments and methodologies, prioritizing those that best represent the specific needs of the corridor in question. The qualification criteria of the bibliographic sources proved to be valid for selecting the information obtained. Through the applied action research methodology, we were able to reflect more on the research development process, which was positive to generate questions and assessments about the available structure used by us for bibliographic research
Influência das condições dinâmicas de usinagem no torneamento sobre a integridade superficial de um aço endurecido
(Universidade Federal de São Carlos, 2021-03-17)
Savella, Felipe Bertolotti
;
Shiki, Sidney Bruce
;
https://lattes.cnpq.br/0573973677787523
;
Antonialli, Armando Ítalo Sette
;
https://lattes.cnpq.br/4367459395417045
Several authors have dedicated themselves to investigating the dynamics of machining operations from different scopes. This type of study is especially valuable when it comes to finishing conditions, as the vibrations in process can significantly affect the surface integrity of the machined components. Turning of steels in the hardened state has gained ground in the metalworking industry as a substitute for abrasive processes. In this case, in fact, monitoring vibrations and controlling different roughness parameters are extremely important, as they can even influence the mechanical behavior of the components in question. This work contains an investigation about the influence of some machining conditions on the vibration of the tool and the surface integrity of the part in hard turning. For this, a specimen of tool steel for hot working type H13 was quenched and tempered made in segmented laps. The experimental procedures are divided into two stages: preliminary tests and new tests. In the former, a conventional lathe was used, a negative tool and, as influencing factors, the rotation of the spindle, the feed and the position of the lap in machining. The vibration signals, measured by piezoelectric tablets, were not able to infer any influence; on the other hand, the triaxial accelerometer indicated the influence of the advance. The roughness parameters, evaluated in a confocal microscope, in turn, showed the influence of the lap in machining. In the new tests, a CNC lathe, positive tool and piezoelectric accelerometers were used, which pointed to a greater influence of rotation and feed on the vibration of the tool. The roughness parameters show the effect of rotation and the position of the lap when machining. In view of the results obtained, it is concluded that this approach can consistently contribute to the improvement of process planning involving the machining of hardened steels. As suggestions for further work, we highlight the study of the influence of dynamic machining conditions on the mechanical behavior of machined components and the evaluation of vibration signals in the frequency domain to enable the identification of the occurrence of the chatter phenomenon.
Comportamento de compra do consumidor de cervejas em Sorocaba-SP: análise sobre as influências da propaganda.
(Universidade Federal de São Carlos, 2021-03-17)
Silva, Ingrid Soares da
;
Machado, Nycole do Amaral
;
Piato, Éderson Luiz
;
https://lattes.cnpq.br/1439984077907071
;
https://lattes.cnpq.br/3027518570929419
The beer market in Brazil arouses interests all over the world. With a large volume of distribution concentrated in a few players, the competition for spaces in this market is fierce, and consequently, investment in advertising grows exponentially. Understanding the consumer purchasing decision-making process and knowing their preferences and influences is essential to direct the strategies of these large companies, ensuring an adequate return on investments in Marketing. The objective of the research is to understand the buying behavior of the beer consumer, identifying the influences in the purchasing decision-making process, in particular the impact of brand communication in this process. This being a quantitative-descriptive research, the data collection sought to capture attitudinal issues of purchase, and the behavior in relation to brands of beer most consumed today, highlighting different aspects such as flavor, packaging and social circle providing relevance in the process.
Arranjos familiares, apoio social e fragilidade em idosos da comunidade
(Universidade Federal de São Carlos, 2021-03-17)
Mota, Gabriela Marques Pereira
;
Zazzetta, Marisa Silvana
;
https://lattes.cnpq.br/2350656835896699
;
https://lattes.cnpq.br/1423177001770929
The family is considered the main assistance, interaction and support network in old age. However, the effectiveness of this protective factor is not always observed. It is known that with advancing age, the chances of developing diseases and dependence increase, intensifying the needs for support and care. Social safety nets play an important role in maintaining family and community ties, contributing to the health and well-being of the elderly. This study aims to analyze a constitution of family arrangements of elderly people registered in a Reference Center for Social Assistance and its relationship with social support, fragility, quality of life and cognition, considering two moments of data collected in the period from 2012 to 2019. In addition to analyzing, from the perspective of the elderly, possible tensions in the family context. This is a longitudinal study using mixed methods with concomitant triangulation that continued the research carried out between 2012 and 2016 with 247 elderly people. Data collection occurred through a home visit with an approximate time of one hour. Instruments were used to obtain sociodemographic data, Edmonton's Fragility Scale to identify frailty; The Montreal Cognitive Assessment for screening cognitive impairment, quality of life (Whoqol-bref and the old), building a Genogram and Ecomapa to assess family and social relationships through tapes. Quantitative data were analyzed using descriptive statistics and the Wilcoxon and Mann Whitney comparison test, those with a qualitative approach using content analysis based on Bardin, using dialectical materialism as the theoretical framework, and Agnes Heller's concept of daily life. 84 elderly people participated in this study. It was noticed that the majority remained living with a family member (73.8%), 54.7% increased their relations with the community. The fragility and non-statistical cognition related to the type of arrangement, however, elderly people who lived alone had worse quality of life in the physical (p0.044) and psychological domains (p0.031) and better scores in relation to the total Whoqol-old ( p0.036). Elderly people who lived with young grandchildren worsened in the social relationship (p0.047) and Whoqol-bref (p0.029) domains, and improved in death and dying (p <0.001) and Whoqol-old (p0, 019). Living with a spouse only worsened the functioning of the sensory abilities (p0.022) and improvements in the domain death and dying (p0.028). Through the categories “Relational processes of the elderly with the family”, “Changes in the elderly's family configuration”, “Support and social support offered and received”, it was observed that family arrangements are dynamic, sources of tensions, conflicts and relationships of interdependence. It is concluded that regardless of the type of family arrangement, the relationships built between its members are essential for the provision of support and support in old age, interfering in their health conditions. It is urgent to reformulate public policies aimed at this specific population in order to provide quality services to this social segment that is growing.
A study of SnO2 nanowire FET devices: ambipolarity effect induced by UV Light exposure and their use as UV sensors
(Universidade Federal de São Carlos, 2021-03-18)
Arantes, Adryelle do Nascimento
;
Chiquito, Adenilson José
;
https://lattes.cnpq.br/7087360072774314
;
https://lattes.cnpq.br/6444614628132115
In this work, SnO2 nanowires (NW) were grown by the Vapor-Liquid-Solid (VLS) method and used to build single NW FET devices. As-grown samples went through structural and morphological analysis and seven single NW devices were built, with a back-gated FET architecture, by direct photolithography. SnO2 NWs grown by VLS method presented the desired tetragonal structure and monocrystalline character, inspected by XRD and HRTEM techniques. In addition, the as-grown samples morphology of a NW with lengths of tens of micrometers and cross-section mostly displaying rectangular geometry were assured through SEM images. The device fabrication process by direct photolithography was proven to be efficient to build the back-gated FET architecture devices with great electrical contacts quality. Single SnO2NWFET’s transport properties were explored, where on/off ratio, mobility and carrier density parameters were extracted, resulting in values around 105, lower than 0.1 cm2/V and in the order of 1019/cm3, respectively. Schottky barrier heights were estimated, considering the gate bias as grounded and room temperature, and Φ_Bn values between 0.41 and 0.75 eV were found. Afterwards, different conditions were analyzed: the device (1) under positive gate bias (V_G>0) and no applied source/drain bias (V_DS=0); (2) V_DS>0 and V_G>0; (3) V_DS<0 and V_G<0 and (4) V_DS<0 , V_G<0 but under UV illumination. Regarding the latter, all devices presented UV induced ambipolary effect, where on/off states ratio with values of the same order were obtained and ranged from 1.1 to about 19.3. A simple band model to explain the observed behavior, i.e., describe how both types of carriers can contribute to the final current depending on the biasing was proposed. Ambipolarity is one of those effects that may direct its use for specific purposes, where a controllable separated unipolar mode can be achieved in one single device. Furthermore, the devices were tested as UV sensors and presented satisfactory results: as a UV photodetector, the acquired I_on⁄I_off ratio was found to be of the order of 〖10〗^4 for all devices investigated. In addition, rise time was found to range 0.56 s < τ_r< 0.63 s, whereas the decay time 0.54 s < τ_d< 0.75 s. According to those results, one can assure their huge feasibility as a UV sensor.
Contribuição dos estudos semióticos para a catalogação de histórias em quadrinhos
(Universidade Federal de São Carlos, 2021-03-18)
Pavarina, Etefania Cristina
;
Zafalon, Zaira Regina
;
https://lattes.cnpq.br/1584935790390793
;
https://lattes.cnpq.br/0906483851923523
This research has proposed to study the contribution of semiotics to the cataloging of comic books. The comics stand out as an object of research, considering the alignment of questions and visual and verbal values, which are intrinsic to them, as well as the process of defining the context of the scenario involved in the story as important elements for the retrieval of information. Thus, the general objective is to evaluate the contribution of semiotics in the cataloging of comic books. The research, of an applied nature, has presented a qualitative approach and exploratory objectives. Systematic mapping of literature was adopted as a method for bibliographic research, and the Content Analysis was used to analyze the data. As a result, it is understood that semiotics and semiology might contribute to the cataloging of comic books, in theoretical-conceptual and methodological aspects. In this perspective, cataloging has been seen as a semiotic process that permeates all stages of Organization and Representation of Information in comics, from the representation process (thematic and descriptive) to the search and recovery by users. It is observed that the semiotic narrative, discursive and cultural currents might contribute to the cataloging of comic books, mainly in the processes of reading, description, and representation.
Inovação social para o envelhecimento ativo: iniciativas em Portugal e no município de São Carlos -SP
(Universidade Federal de São Carlos, 2021-03-18)
Mello, Kemilly Bianca de
;
Pedro, Wilson José Alves
;
https://lattes.cnpq.br/8135701448186851
;
https://lattes.cnpq.br/8614808357673501
The idea of social innovation (SI) stands out today, but when linked to active aging, there is a very large gap in knowledge and practice, especially in Brazil. In the face of this unexplored theme, this research aims to identify and analize SI initiatives focused on active aging in the city of São Carlos-SP and north region of Portugal. This research used a theoretical-empirical methodology and a multi-case study aimed at identifying SI initiatives linked to active aging and quality of life. In addition, a study of the state of the art of SI and active aging was carried out to understand and update itself on the productions developed. The project referring to this research was approved by the Research Ethics Committee - CEP / UFSCar (Opinion nº 3,350,844). The results and discussions point to the existence of well-consolidated SI initiatives for active aging in Portugal, mainly due to the support for this demand in the country and on the European continent. In São Carlos, the initiatives identified, despite not calling themselves SI, aim to meet the demands associated with aging in an innovative way. In addition, this study shows the relevance of research on the theme of social innovation for active aging in the Brazilian context, since there is a lack of knowledge on this theme and there are no public policies for social innovation in Brazil. The final considerations, on the other hand, present reflections and possibilities to expand this theme for its diffusion and incentive to social transformations.
O livro didático do professor na pré-escola: uma análise das propostas pedagógicas a partir das políticas públicas educacionais
(Universidade Federal de São Carlos, 2021-03-18)
Silva, Caroline Lurdes
;
Souza, Geraldo Tadeu
;
https://lattes.cnpq.br/3516168011612531
;
https://lattes.cnpq.br/4854690633680864
This monograph has the general objective of developing a critical look at the pedagogical proposals suggested for the preschool through the use of the teacher's textbooks. From the documental point of view, we studied the public educational policies Opinion CNE / CEB nº 20/2009, Resolution CNE / CEB nº 5/2009, National Curricular Guidelines for Early Childhood Education (DCNEI) and Common National Curricular Base (BNCC), from of which it was possible to understand the guidelines for teaching practices in the first stage of Basic Education and to problematize the role that the teacher and the child need to assume in the educational process during early childhood education. To think about the presence of the textbook in Early Childhood Education, we explored the National Book and Didactic Material Program (PNLD) through the edition of PNLD 2019, which selected teacher textbooks aimed at pre-school educators and teachers. Based on this assumption, pedagogical proposals analyzed by the didactic work Pé de brincadeira (CORDI, 2018) are analyzed, in view of the legal documents and their guidelines for the curricular organization in early childhood education. As a result of this research, we built a critical view of the possibilities that the textbook object can bring to the pre-school teacher as a source of continuing education and as an inspiring resource for pedagogical practices in the interaction with young children, enriching the teaching process-learning in early childhood education.
Dados de autoridade de artistas da música: estudo do Virtual International Authority File (VIAF) e das diretrizes Resource Description and Access (RDA)
(Universidade Federal de São Carlos, 2021-03-19)
Santos, Amanda Azevedo dos
;
Arakaki, Ana Carolina Simionato
;
https://lattes.cnpq.br/9896600626524397
;
https://lattes.cnpq.br/6369048677495394
With technological advances, daily tasks have been modified, especially the activities that streamline, interact, and relate us to the platforms, applications and webservices that enable the production of information. Given this advance, it is also seen great challenges such as the difficulty ofaccessing, using and reusing data and information that are published on the Web. In this cenario, several professionals seek an improvement to the Web and improve the user experience in this environment and a representation of information in an appropriate and efficient way. Related to the context of music, is seen a great flow of information, about music, history, and related people, such as music artists who have great cultural appeal. However, viewing the information of these artists may not be in accordance with what the user wants or does not allow the user to find other artists or informational resources related to it. For this reason, the problem of this research is to investigate how resource description and access (RDA) and virtual international authority file (VIAF) help in publishing authority data for music artists? Thus, the general objective of this research is to systematize the guidelines and descriptions presented by VIAF and the RDA for the publication of authority data for music artists. As for methodological procedures, this research is a qualitative, theoretical, and exploratory research that addresses the themes: representation of information, authority data, metadata, metadata patterns, authority data of music artists. The results present the guidelines of resource description and access (RDA) and the Virtual International Authority File (VIAF), initiatives that have addressed the cataloging processes, in addition to the restructuring of catalogs based on the conceptual models of the FR Family andthe IFLA LRM model, as well as the perspective on the relationships between entities and the definition of their attributes. In the context of the representation of music artists and bands (collective entity), the use of these guidelines helps in the control and definition of authority and an exhaustiveness of the relationships between each authority. When analyzing RDA guidelines, guidelines were verified to describe the attributes of entities and their relationships, all in a practical and flexible way. VIAF, in turn, raises the issue of sharing the records of people and collective entities. Thus, the RDA and VIAF collaborated positively in the development of examples of description of authority data. It is considered that their contributions of this research are linked to the time savings of a user, due to the creation of access points for a recovery of authority in a more adequate andefficient way, in addition, with a record that presents correct information directly and with basis, the user in addition to recovering what needs, recognizes and finds other artists of music who at some point related.
Dog Hero, tutores e pets: antropomorfismo animal e mobilidades contemporâneas
(Universidade Federal de São Carlos, 2021-03-19)
Barros, Lucas Benegas
;
Santos, Mateus Augusto dos
;
Ferragi, Cesar Alves
;
https://lattes.cnpq.br/8059661338196579
;
https://lattes.cnpq.br/5281603246522503
This dissertation summarizes the elements that put on evidence the attenuation of human-animal anthropomorphic relationship due to accentuated mobilities in contemporary society. These phenomenons are discussed in order to analyze and understand how a socio-affective relationship between owners and pets can impact when an individual person wishes to make tourism. In order to achieve this goal, a bibliographic review was made on the subjects of animal anthropomorphism, hospitality, the pet market and mobilities. A case was built, following the content analysis process, in order to understand how the DogHero platform works. It is a startup with an alternative mindset capable of offering a resolution between the fluidity and influidity paradigm of individuals who wants to travel around the world and also be good pet owners. In addiction, a questionnaire was elaborated and disseminated through the google forms platform. The main objective was to understand and correlate the bibliography study and the case with the demand of contemporary dog owners. The conclusion of the study implies the paradox created by anthropomorphism and mobilities impacts directly on how pet owners make tourism and, despite a mindset that approaches the studied elements and prioritizes connection between people to generate trust, the DogHero platform is not recognized by the majority of the owners interviewed on this research. This may put on evidence there are a lot more study subjects to explore about pet market latencies surrounding risk and trust.
Análise do desempenho do gráfico de controle do desvio do nominal em pequenos lotes de produção
(Universidade Federal de São Carlos, 2021-03-19)
Meira, Márcio Ricardo Morelli de
;
Oprime, Pedro Carlos
;
https://lattes.cnpq.br/9291517431456908
;
https://lattes.cnpq.br/6165017917939826
Since originally proposed by Shewhart in the 1920s, control charts are widely used by manufacturing companies to monitor and control production processes. The purpose of the control charts is to detect special causes so that corrective actions are taken, whenever necessary, ensuring stability and capacity to the process. Over the years, production systems have changed. The concept of lean manufacturing has gained more space and the use of Shewhart control charts in these environments has been questioned. Specific methods were developed from there, due to the possibility of fundamental assumptions violation and unavailability of data for an accurate parameters estimation. Among the main specific methods, there is the deviation from nominal control chart. However, Montgomery (2014) highlights some essential aspects, such as, for example, the influence of process variation on its performance. This work studies the effect of parameters estimation and the influence of process variation on the deviation from nominal control chart performance through the Average Run Length (ARL) method and proposes some adjustments on the control limits so that its use is optimized in small production batches. For this, the research method used was modeling and computer simulation. The results found validated the propositions presented by the literature, verifying that the control charts built with estimated parameters, instead of known ones, present a lower performance than expected. There was a significant influence of the process variation on the performance of the control chart. However, it has also been demonstrated that small adjustments on the control limits can make it enable on lean manufacturing environments.
Obtenção de heteroestruturas SnO2/Nb2O5 e aplicação em sistemas de interesse ambiental
(Universidade Federal de São Carlos, 2021-03-19)
Rodrigues, Thaís Aparecida
;
Mendonça, Vagner Romito de
;
https://lattes.cnpq.br/4270375873948823
;
https://lattes.cnpq.br/3891783906198938
The population increase has caused several environmental problems such as contamination of aquatic bodies by organic compounds and the emission of CO2 in the atmosphere. An alternative to mitigate these impacts is Heterogeneous Photocatalysis, which is based in the use of irradiated semiconductors to oxidize organic compounds by the generation of highly oxidizing radicals, such as •OH and O2•-, or yet to reduce CO2, converting it in higher value-added products. However, a limitation is the high electron/hole (e-/h+) pair recombination rate. One way to reduce this problem is the coupling of two semiconductors in an interface in common, forming heterostructures, which allows the charge separation, prolonging their lifetime. Nb2O5 is a promising material in several fields due to its properties, including in photocatalytic processes. Additionally, it is of national interest since it can be obtained from Niobium Ammoniacal Oxalate, a byproduct from mining process. SnO2 also has physical and chemical properties suitable for applications in environmental systems. However, its energy bands do not favor its direct application in heterogeneous photocatalysis. On the other hand, the junction with Nb2O5 presents an adequate band structure for Type II heterostructure formation. This heterostructure type enables the migration of the h+ to a semiconductor, while the e- accumulates in the another, increasing the lifetime these photogenerated charge. In this work, several synthesis variables, such as precursors, synthesis temperature and time, were studied in a process based on hydrothermal treatment. The samples were characterized by XRD, Raman Spectroscopy, FTIR, DRS, SEM-EDS and SEM-FEG, N2 Fisisorção e Zeta potential. Besides that, the samples were used in different processes, such as photodegradation of organics pollutants in water, removal of contaminants via adsorption and CO2 photoreduction. The results demonstrated that the attempt to obtain Nb2O5/SnO2 heterostructures was successful, since heterostructured materials presented higher performance in different processes, when compared to isolated materials, showing the heterostructure versatility, which can be used as a single platform for the remediation of different problems.
Aproximações entre humanidades digitais e organização do conhecimento
(Universidade Federal de São Carlos, 2021-03-19)
Andrade, Laura Mariane de
;
Dal'Evedove, Paula Regina
;
https://lattes.cnpq.br/1170937498266968
;
https://lattes.cnpq.br/3971375597734790
In the last decades, a new field of research has emerged and has been consolidated, namely the Digital Humanities that, in the integration of traditional Human Sciences in digital environments, determine their particularities by renewing the humanistic praxis. Due to their transdisciplinarity character, debates involving Digital Humanities in Information Science have been increasingly stimulated, as they can contribute to the resources understanding and appropriation, making both areas interrelated under an emerging theme for Information Science, ideally in Knowledge Organization. In order to identify how studies in the Knowledge Organization universe incorporate digital technologies added to the humanities, the purpose is to present a study on scientific configuration of Knowledge Organization that works with the Digital Humanities from Science of Information, more specifically (1) identifying the presence of Digital Humanities in Information Science and their approach to themes of Knowledge Organization; (2) rescuing the Knowledge Organization as an interdisciplinary field of knowledge and às an investigative space for issues related to content in the digital environment representation; and (3) analyzing the scenario presented by international scientific papers with the help of Iramuteq software and how the most consistent studies in Knowledge Organization reveal the Digital Humanities absorption. For that, we resort to bibliographic research, collection, application of the Iramuteq software to obtain textual analysis in 96 papers abstracts collected from international databases with scope of Digital Humanities and Knowledge Organization, and, finally, a qualitative analysis of 25 papers from one of the classes identified by the software closest to the research proposal. The analysis reveals the terminological insertion of Digital Humanities in discussions inherent to Knowledge Organization is not scarce, however such researchers find it difficult to theorize, discuss and appropriate epistemological domains of Knowledge Organization and Digital Humanities. We conclude that initiatives consistency that link Digital Humanities to the object of investigation of information scientists seems to be a consensus for appropriation by the Knowledge Organization and establishment of Digital Humanities in their context, especially in a society increasingly mediated by digital.
Produção e caracterização de nanoestruturas de carbono por PECVD
(Universidade Federal de São Carlos, 2021-03-19)
Almeida, Larissa Solano de
;
Rossino, Luciana Sgarbi
;
https://lattes.cnpq.br/0139027055418391
;
https://lattes.cnpq.br/6673871313645316
In recent decades, studies and discoveries related to carbon nanostructures have been intensified, mentioning carbon nanotubes, graphene and their derivatives. These structures have unique physical and chemical properties, attributed to their structures, and can be applied in different areas. In the area of biomedicine, carbon nanostructures are highlighted for their biocompatibility with the human body. Amorphous carbon films have great potential to be applied in implant coating, as graphene and its derivatives also have such potential. However, conventional synthesis methods require high temperature, reaching 1000° C. Thus, the plasma-assisted chemical vapor deposition (PECVD) method has been explored to synthesize carbon nanostructures, due to relatively large-scale production and at low treatment temperature. The objective of this work is the production and characterization of carbon nanostructures by the PECVD technique with a DC-pulsed source, using substrates of copper, nickel, titanium and stainless steel 304. The growth of carbon nanostructures was carried out through the use of CH4 precursors and H2 using oxide films of substrates as catalyst, studying the influence of stress on the formation of the catalyst and the influence of the addition of argon and total gas flow on the growth of carbon nanostructures. The techniques for the characterization of the formed nanostructures were X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electrochemical measurements. The results obtained proved to be promising for the production of carbon nanostructures by PECVD, which technique favored the growth of graphene, carbon nanotube and DLC films on oxidized substrates as a function of treatment parameters at temperatures below the conventional one. Argon was shown to be necessary to obtain crystalline structures, such as graphene and carbon nanotubes. The graphene produced had 2 to 5 layers and the carbon nanotubes have multiple walls. The materials obtained presented good quality and could be used in several areas. Thus, the PECVD technique using pulsed DC source was effective in obtaining characteristic structures of graphene, carbon nanotube and amorphous carbon at low temperature, obtained according to the treatment parameters.
Competência em informação na era da pós-verdade: a (in)formação na graduação em biblioteconomia e ciência da informação da UFSCar
(Universidade Federal de São Carlos, 2021-03-19)
Dias, Fernando Brito da Costa
;
Furnival, Ariadne Chloe Mary
;
https://lattes.cnpq.br/1291482506649810
;
https://lattes.cnpq.br/1041904674820886
The terms disinformation and fake news are used to denote false information or rumors that are mostly published on social networks, which often aim to manipulate public opinion or defame something or someone. This scenario increases in tandem with the ease of producing information on the web. Thus, the present study seeks to relate the topic of disinformation, fake news and information literacy - topics studied in Information Science - to Higher Education. Discussions about information literacy address the user's ability to recognise the need for certain information and have the necessary skills to locate, evaluate and use it in order to meet their need. This research is of a descriptive-exploratory nature as a way of identifying content related to the topic of information literacy in the curriculum of the undergraduate course in Library and Information Science at the Federal University of São Carlos and verifying whether such content contributes to reducing the sharing of disinformation and fake news by students. For the structuring of the research, a bibliographical survey of scientific publications on the subject was carried out, using the subjects ‘information literacy’, ‘post-truth’, ‘disinformation’, ‘fake news’ and ‘agnotology’. For data collection, a questionnaire was applied virtually to students in the first and fourth years of the undergraduate course. The data were analysed using a qualitative and quantitative approach in order to identify the level of information literacy of students from the questions answered based on indicator two of standard three of the Information Literacy Competency Standards for Higher Education of the Association of College and Research Libraries (ACRL), a division of the American Library Association. According to indicator two of standard three, an information literate student must be able to master and use initial methods of evaluating information and its sources. After the study, the hypothesis that there are subjects in the course that have content that relate to the development of skills related to information literacy was proven. The identified disciplines are related to the use of ICT; the recognition of how information is developed, manipulated, organised, stored, made available and disseminated; skills related to research techniques and awareness of the ethical and legal use of information. Of the 16 subjects identified, only 6 are offered in the first year of the course, which puts first year students at a disadvantage when compared to those in the fourth year. The disciplines contribute to the development of skills related to the development of information literacy by addressing content related to information literacy. In addition, after analysing the responses to the questionnaire, it was found that first year students are more likely to share misinformation on social networks, since the rate of verification of such content is lower than that of fourth year students, which reinforces the hypothesis that the curriculum of the course tangibly contributes to the development of information literate students.
Mulheres negras e seus universos: comunidade de Vila Bela, terra, conflitos e memórias nos (des)caminhos da identidade étnica: (1960-2018)
(Universidade Federal de São Carlos, 2021-03-19)
Silva, Silviane Ramos Lopes da
;
Mancuso, Maria Inês Rauter
;
https://lattes.cnpq.br/3208435983286140
;
Silvério, Valter Roberto
;
https://lattes.cnpq.br/9421231847055027
This research moves to give visibility to the struggle to maintain the spaces, knowledge, and practices of an Afronative community, whose border territory is an area of conflict involving the ethnic-racial issues triggered, especially, by the expansion of the agricultural frontier in the Midwest region driven by national integration policies. Established as the headquarters of the Capitania of Mato Grosso, Vila Bela da Santíssima Trindade becomes a space for Blacks and Natives after the transfer of capital and departure of the elite to Cuiabá in the nineteenth century. With this change, the population that remained in the place constituted new relations and changes in the landscape. Given the return of White people (the “other”) to the city in the 1960s, transformations in the use of the territory and the way of life of residents redefine ethnic and symbolic boundaries, as well as resignification with the spaces. Considering that identity is reconstituted from differences, as fluid and fragmented, the Black women of Vila Bela fraternize with the Chiquitanas, appropriating the legacies left by their ancestors, and constitute the Afrochiquitania to resist the “other” who expropriated their lands and tries to occupy their spaces. In this context of conflicts, oppression, (re)constructions that this research intends to take, to try to understand the dynamics of overcoming the differences and inequalities experienced since the quilombola resistance of Tereza de Benguela, in the eighteenth century, until the contemporaneity in the daily anonymity experienced by the women of Vila Bela. Walking in the female “universe” with their stories and memories seeks to analyze what mechanisms these women use to ensure belonging to the place and reaffirm their ethnic identity.
Impacto do uso de realçador de sabor obtido de subproduto de cogumelo sobre a qualidade de hambúrguer bovino com redução de sódio
(Universidade Federal de São Carlos, 2021-03-22)
França, Fabiana
;
Selani, Miriam Mabel
;
https://lattes.cnpq.br/4857619853197645
;
https://lattes.cnpq.br/7087827996196146
Sodium has essential functions in the body, but its excessive ingestion can cause a series of chronic diseases, such as hypertension and cardiovascular problems. Due to this, the demand for low-salt meat products is increasing. One of the main alternatives to reduce sodium in these products is the use of flavor enhancers. Mushroom is known to be a natural flavor enhancer. During its harvest, part of the stipe is discarded, which could be used to obtain umami compounds. This study aimed to evaluate the impact of sodium reduction and the addition of natural flavor enhancer (RSN) obtained from mushroom stipe on the physicochemical and texture characteristics, as well as to evaluate the free amino acids content and the volatile compounds profile of beef burgers. After obtaining the RSN, it was applied in 2 concentrations in beef burgers with 3 levels of salt reduction, totaling 6 treatments, in addition to the control. The color of raw burgers was not affected by the formulations, whereas cooked burgers did not change their redness, but showed a slight increase in the L* and b* parameters. There was a slight increase in the pH of raw samples with the addition of the umami ingredient, but cooking minimized these differences. Water activity varied slightly between treatments, only for raw burgers. There was no effect of treatments on cooking loss and diameter reduction. The hardness and chewiness had their values reduced with the decrease of salt and increase of umami ingredient, resulting in softer burgers. The addition of RSN to beef burgers increased the content of the free amino acids proline and phenylalanine. The volatile profile of beef burgers showed a slight increase in compounds also found in the RSN, such as some aldehydes, alcohols and sulfur compounds. The results obtained show that the reduction of salt and the addition of a flavor enhancer obtained from shitake stipes is viable for application in beef burger, considering the physicochemical parameters, texture and the profile of free amino acids and volatile compounds, thus emphasizing the opportunity and the potential for the development of healthier burgers.
Manual de experimentos de física utilizando um smartphone
(Universidade Federal de São Carlos, 2021-03-22)
Freitas, Renan Gustavo Beloni
;
Brandl, Ana Lúcia
;
https://lattes.cnpq.br/3308757619164141
;
https://lattes.cnpq.br/6264527062338417
This work aims to propose a physics experiment manual to be used in high school and elementary school, containing four low-cost scripts based on the acquisition of data through different sensors available on smartphones through a free application called Physics Toolbox . Based on the assumptions of David Ausubel's learning theory and how it can be applied in a teaching context based on experimental activities carried out in groups, it is expected that the application of the proposed scripts will bring greater meaning to the concepts covered in comparison with purely theoretical classes. , as well as encourage teachers who use the tools presented to develop their own proposals. Each script was designed to be completed in two classes, within a common classroom, with proposals that fall mainly in the investigative and verification fields. Its content presents, in addition to the methodology of the proposal and class for which it is intended, a brief introduction encompassing the related physics content and the specific sensor that will be used, with each of the manual's scripts being able to be worked independently of the others. The chosen themes are related to the content of Mechanics, Acoustics and Electromagnetism. Due to the impossibility of developing the work in the school environment due to the social distance imposed by the pandemic of COVID-19, the results of the experiments carried out by the author and fellow professors participating in the MNPEF are presented and discussed, together with their impressions related to the development of proposals. The analysis of these results demonstrates a great precision of the data obtained with the smartphone and minimum difficulty of execution, that added to the other functionalities of the employed applicationsuggests excellent possibilities of execution of the proposed experiments inside the school.