A democracia em rede: um estudo das manifestações recentes e o uso das redes sociais on-line

This thesis analyzes the global and Brazilian manifestations occurred since 2011, taking as a unifying and organizational element the social networks Facebook. The study was conducted through a literature survey about the protests in the streets and the Internet, in books, magazines, articles and academic papers, as well as comments on Facebook during the protests in Brazil.

As compreensões do construtivismo de Ernst Von Glasersfeld e John Fossa: intermediando um diálogo em busca de novas significações

The present thesis, orientated by a letter sent by Ernst von Glasersfeld to John Fossa, is the product of a theoretical investigation of radical constructivism. In this letter, von Glasersfeld made three observations about Fossa’s understanding of radical constructivism. However, we limited our study to the second of these considerations since it de als with some of the core issues of constructivism. Consequently, we investigated what issues are raised by von Glasersfeld’s observation and whether these issues are relevant to a better understanding of constructivism and its implications for the mathema tics classroom . In order to realize the investigation, it was necessary to characterize von Glasersfeld’s epistemological approach to constructivism, to identify which questions about radical constructivism are raised by von Glasersfeld’s observation, to i nvestigate whether these issues are relevant to a better understanding of constructivism and to analyze the implications of these issues for the mathematics classroom. Upon making a hermeneutic study of radical constructivism, we found that what is central to it is its radicalism, in the sense that it breaks with tradition by its absence of an ontology. Thus, we defend the thesis that the absence of an ontology, although it has advantages for radical constructivism, incurs serious problems not only for the theory itself, but also for its implications for the mathematics classroom. The advantages that we were able to identify include a change from the usual philosophical paths to a very different rational view of the world, an overcoming of a naive way of thi nking, an understanding of the subject as active in the construction of his/her experiential reality, an interpretation of cognition as an instrument of adaptation, a new concept of knowledge and a vision of knowledge as fallible (or provisional). The prob lems are associated with the impossibility of radical constructivism to explain adequately why the reality that we build up is regular, stable, non - arbitrary and publicly shared. With regard to the educational implications of radical constructivism, the ab sence of an ontology brings to the mathematics classroom not only certain relevant aspects (or favorable points) that make teaching a process of researching student learning, empowering the student to learn and changing the classroom design, but also certa in weaknesses or limitations. These weaknesses or limitations of constructivism in the classroom are due to its conception of knowledge as being essentially subjective. This requires it to work with one - on - one situations and, likewise, makes the success of teaching dependent on the teacher’s individual skills. Perhaps the most important weakness or limitation, in this sense, is that it makes teaching orientated by constructivist principles unable to reach the goal of the formation of a community. We conclud e that issues raised by von Glasersfeld’s observation are absolutely relevant to the context of a better understanding of radical constructivism and its implications for education, especially for Mathematics Education.

Novas abordagens para configurações automáticas dos parâmetros de controle em comitês de classificadores

Significant advances have emerged in research related to the topic of Classifier Committees. The models that receive the most attention in the literature are those of the static nature, also known as ensembles. The algorithms that are part of this class, we highlight the methods that using techniques of resampling of the training data: Bagging, Boosting and Multiboosting. The choice of the architecture and base components to be recruited is not a trivial task and has motivated new proposals in an attempt to build such models automatically, and many of them are based on optimization methods. Many of these contributions have not shown satisfactory results when applied to more complex problems with different nature. In contrast, the thesis presented here, proposes three new hybrid approaches for automatic construction for ensembles: Increment of Diversity, Adaptive-fitness Function and Meta-learning for the development of systems for automatic configuration of parameters for models of ensemble. In the first one approach, we propose a solution that combines different diversity techniques in a single conceptual framework, in attempt to achieve higher levels of diversity in ensembles, and with it, the better the performance of such systems. In the second one approach, using a genetic algorithm for automatic design of ensembles. The contribution is to combine the techniques of filter and wrapper adaptively to evolve a better distribution of the feature space to be presented for the components of ensemble. Finally, the last one approach, which proposes new techniques for recommendation of architecture and based components on ensemble, by techniques of traditional meta-learning and multi-label meta-learning. In general, the results are encouraging and corroborate with the thesis that hybrid tools are a powerful solution in building effective ensembles for pattern classification problems.

Segurança alimentar e nutricional dos agricultores familiares da associação dos produtores e produtoras orgânicas de Ceará Mirim/RN

The proposition of this research is supported by the definition of Food Safety and Nutrition (FSN), established by the II FSN National Conference. Taking this concept as reference, the research instrument aimed to analyze strategies and actions related to FSN, developed by members of Ceará Mirim Organic Producers Association, located in Rio Grande do Norte state (Brazil), from aspects related to family feeding, as well as means of access, quantity and food culture. It was aimed to answer the following questions: Do the families benefited from Ceará Mirim Organic Producers Association have strategies that assure their FSN? If so, do these strategies originate from public policies or own actions? Do these strategies focus on family revenue? In expenses with food and proper feeding? How do these strategies articulate together and which social networks do they form? In this research, there were also approached questionings which comprise market opening through the declaration of the products as Organization of Social Control (OSC), aggregate value and participation in agroecological fairs, aiming to identify and characterize if these strategies contribute for Food Safety and Nutrition of these families. The data here analyzed were obtained from semi-structured interviews, conducted in the production sites of each farmer, and have a qualitative approach. 21 questionnaires were applied to the family farmers, in seven projects of agrarian reform settlements (Carlos Marighella, Nova Esperança II, Aliança, Marcoalhado I, Santa Águeda, Santa Luzia and União). From this study, it was concluded that most of FSN strategies result from a series of distinct public policies, which potentiate the existing strategies and create new ones, such as in the case of organic production, which is the main motivation, even for the organization of the studied group. These strategies brought improvements in feeding and caused changes in eating habits, especially in the diversification of production for own consumption. This, on the other hand, is assuring greater food autonomy and increasing marketing channels, through fairs or institutional markets. It was also verified that reciprocity relations increased after the organic production, and they are indispensable to assure food in difficult times, also contributing to incentive organic production itself, through supplies exchange.

Descrição de novas espécies de Entomobryoidea, Womersley, 1934 (Collembola, Hexapoda) em remanescentes urbanos de mata atlântica no Estado do Rio Grande do Norte

Springtails are commonly recognized microarthropods edaphic environments. Among the most common (and most visible) forms of these animals are the Entomobryoidea, one of the most diverse groups of springtails. Although more than 8,300 species of Collembola are registered on the globe, in Brazil a little over 310 species are recorded, mostly in the Southeast. In the Northeast, particularly in Rio Grande do Norte, these records are still reduced, even in the Atlantic Forest domain for this admittedly diverse fauna and specifically, for Entomobryoidea. This study aimed to describe new species of Entomobryoidea in urban remnants of Atlantic Forest in Rio Grande do Norte, specifically in Parque das Dunas, Natal in the Environmental Protection Area Genipabu, Extremoz. The collections were made in the months July and August 2012 and January and February 2013, using entomological vacuums and plastic trays. The specimens were identified in the laboratory and described in detail by looking at the literature. In this paper four new species were described Entomobryidae family: Entomobrya sp. nov. 1, Seira sp. nov. 1, Seira sp. nov. 2 and Trogolaphysa sp. nov. 1. Seira sp. nov. 1 has clear similarities to S. paraibensis, however the chaetotaxy of the mesothorax and abdomen IV distinguishes both species. The number of phylogenetic proximity suggests similarities between species. Seira sp. nov. 2 is characterized by its chaetotaxy, mainly in the 'M' head and his mesothorax. There is possibility of a phylogenetic relationship with S. praiana and S. Potiguara due to some similarities. Entomobrya sp. nov. 1 has little resemblance to Brazilian species, from the point of view of color, however there is for the latter detailing the dorsal chaetotaxy, which might obscure evolutionary relationships of proximity. Even so, the main diagnostic feature Entomobrya sp. nov. 1 compared to other species of the genus is the complexity of the chaetotaxy of the fifth abdominal segment. Descriptions of new species of Collembola, potentially endemic to their habitats of occurrence may help to understand the morphological and evolutionary patterns in the sampled taxa, as well as the preservation of the environments in which they were found.

ArchWiSeN: uma estratégia baseada em modelos para desenvolvimento de aplicações para redes de sensores e atuadores sem fio

Wireless Sensor and Actuator Networks (WSAN) are a key component in Ubiquitous Computing Systems and have many applications in different knowledge domains. Programming for such networks is very hard and requires developers to know the available sensor platforms specificities, increasing the learning curve for developing WSAN applications. In this work, an MDA (Model-Driven Architecture) approach for WSAN applications development called ArchWiSeN is proposed. The goal of such approach is to facilitate the development task by providing: (i) A WSAN domain-specific language, (ii) a methodology for WSAN application development; and (iii) an MDA infrastructure composed of several software artifacts (PIM, PSMs and transformations). ArchWiSeN allows the direct contribution of domain experts in the WSAN application development without the need of specialized knowledge on WSAN platforms and, at the same time, allows network experts to manage the application requirements without the need for specific knowledge of the application domain. Furthermore, this approach also aims to enable developers to express and validate functional and non-functional requirements of the application, incorporate services offered by WSAN middleware platforms and promote reuse of the developed software artifacts. In this sense, this Thesis proposes an approach that includes all WSAN development stages for current and emerging scenarios through the proposed MDA infrastructure. An evaluation of the proposal was performed by: (i) a proof of concept encompassing three different scenarios performed with the usage of the MDA infrastructure to describe the WSAN development process using the application engineering process, (ii) a controlled experiment to assess the use of the proposed approach compared to traditional method of WSAN application development, (iii) the analysis of ArchWiSeN support of middleware services to ensure that WSAN applications using such services can achieve their requirements ; and (iv) systematic analysis of ArchWiSeN in terms of desired characteristics for MDA tool when compared with other existing MDA tools for WSAN.

Novas formas de governança pública: um estudo do arranjo articulado para Implementação da política pública nacional de aprendizagem profissional

The configuration assumed by the institutional governance arrangement established in the cities of Fortaleza and Natal, and its influence on the implementation of the National Public Policy of Professional Learning that promotes the formation and integration into the labor market of teens and young people aged 14 to 24 years old and people with disabilities is the aim of this thesis. The interactive governance approach, proposed by Kooiman (2003.2008) was the mainstay of the epistemological construction of the investigative process, also supported by contributions from Draibe (2001) concerning the stages of implementation of public policies. In methodological terms, the approach used was qualitative, being performed descriptive bibliographical and documentary research, applying semi-structured interviews with 44 subjects. Data were based on Bardin (2011), having been pre-established two categories of analysis: governance and implementation. The results pointed, among other things, to greater diversity and dynamics of the arrangement in Fortaleza, highlighting the much larger number of accessions of Nonprofit Entities (ESFLs) to politics, more frequent interactions between stakeholders from different organizational levels of governance, better alignment between guiding governance images and spaces designed to encourage interactions among actors and also greater local government involvement. In both cities studied, on the other hand, the study indicated that the failure of institutional capacities adversely affect the interactions stimulation and the exercise of meta-governance. The thesis concluded that the shape and intensity of the interactions between the actors involved in the implementation of the National Public Policy of Professional Learning and the way images are shared results in greater understanding and dissemination of the policy and create a favorable environment for cooperation and dialogue needed to collective work and favors the modeling of a governance structure able to handle the demands and characteristics of organizations and their participants in order to accommodate the divergent interests, make room for the creation of innovations and convergence of actions to achieve the objectives of the policy. Thus, the results of the Professional Learning Policy in the cities of Natal and Fortaleza, in terms of levels of entering the labor market, can be understood from the differences found in the governance structure of the institutional arrangement used for its implementation.

Predição de séries temporais de parâmetros de redes HSPA - WCDMA

With the growing demand of data traffic in the networks of third generation (3G), the mobile operators have attempted to focus resources on infrastructure in places where it identifies a greater need. The channeling investments aim to maintain the quality of service especially in dense urban areas. WCDMA - HSPA parameters Rx Power, RSCP (Received Signal Code Power), Ec/Io (Energy per chip/Interference) and transmission rate (throughput) at the physical layer are analyzed. In this work the prediction of time series on HSPA network is performed. The collection of values of the parameters was performed on a fully operational network through a drive test in Natal - RN, a capital city of Brazil northeastern. The models used for prediction of time series were the Simple Exponential Smoothing, Holt, Holt Winters Additive and Holt Winters Multiplicative. The objective of the predictions of the series is to check which model will generate the best predictions of network parameters WCDMA - HSPA.

Resiliência e apoio social em gestantes tardias

The gestation process, in general, is a very important event on a woman’s life and it brings phisical, phisiological and emotional changes, which by itself is an experience full of intense feelings. By late-aged pregnancy we mean those which occurs at the age of 35 or further. The occurance of this type of pregnancy is rising in Brasil and throughout the world, factors such as, better access to birth control resources and the search for financial stability explains the pregnancy delay. Important processes like resilience and social support can help late-aged pregnant women, in a benefical way, to adapt to the gestation process. Resilience is the capacity that a certain individual or group of individuals have to go through an adverse situation, be able to overcome it and become streghtened, transforming it in motivation for its biopsichosocial development. Social support is a complex and dinamic process that involves transactions between individuals and their social networks, meeting the social needs, promoting and complementing the personal resources that they have to face new demands. This research has the intention of raising information about the issues of late-aged pregnant women in the County of Natal- RN, the main objective was to evaluate the resilience indicators and the social support on late-aged pregnant women in the Natal-RN County. A transversal cut, correlational and descriptive research that was done with 150 lateaged pregnant women. The tools that were used were: A form with sociodemographic and gestation info, the scale of resilience and social support. An eletronic spreadsheet sofware (Excel e SPSS 21.0) was used to analize data which helped on the statistics according to its variables and the objective of this work. For the nominal variables, relative frequencies were used and for continuous the Pearson correlation and determination coefficient were used, regarding that; the sample had a normal distribution. The project fulfilled the ethnic aspects prescribed by Resolution 466/12 of the National Health Council, with a favorable decision (356.436/ 2013) of the UFRN Ethics on Research Committee. Most of the pregnant women had a low money income and education level, born in the state of Rio Grande do Norte they had an average age of 37,49 (±2,577), catholic, married, house wives, they had more than one child and were on their third trimester of pregnancy; they also had a low past abortion rate, not having planned their pregnancy, with an average of 4,22 (±2,506) pre-natal appointments, residing with an average of 3,673 (±1,397) people, having used any sort of birth control device and having high indicators of resilience and social support. The correlations kept between resilience, social support and some of the social demographics and gestation variables were considered low. Such data points out the fact that most of these women were in a stable relationship; they hadn’t had a past of abortion, they were involved with some kind of religion, they were not first pregnancy mothers, had an age on which they are not considered inexperienced mothers and even had scored high on the social support scale, these may all possibly be the most contributing factors on development and resilience building on these 35 years or more mothers. We expect that the data and information from this research may add up knowledge, actions and improvements regarding late-aged pregnant women and the pregnancy phenomena in general.

Da maniva ao grolado: práticas produtivas e patrimoniais no processo identitário dos Tremembé de Almofala (CE)

The indigenous political scene in Brazil is undergoing transformations that need to be better analyzed by scholars in the field of the Social Sciences. The deficit in the policy of indigenous land demarcation emerges as the largest obstacle in the conquest of collective rights. Therefore, a study to analyze renewed strategies in the struggle for social rights, and their implications in local everyday life relations, is urgent. In this context, the aim of this research is to understand the current social dynamics of identity among the Tremembé people of Almofala, in the state of Ceará, Brazil, with a fieldwork conducted in the flour mill of the Casa de Farinha Comunitária project, in the Lameirão community. Specific aims are: a) to analyze the processes involved in the project in order to comprehend their meanings and appropriations as well as their everyday life and political uses; b) understand the strategies to fight for social benefits; c) analyze the local ethnic classifications grounding the construction of the Tremembé identity in Almofala. Methods deployed are ethnography of communities, used to apprehend the social production of networks of relationships, and a social cartography of practices. The realization of rights demanded by the indigenous populations in Brazil is intertwined with a process of social and legal legitimation their identity and cultural heritage. Such legitimation works as a safeguard mechanism of rights secured by the Constitution. Therefore, to own a “cultural heritage” is perceived as a “passport” to benefit from emerging rights. Amid this context, changes in the traditional processing of the cassava root, a productive practice shared locally by diverse social groups, is reified as cultural heritage by the Tremembé people of Almofala and their network of collaborators in the pursuit of accessing distinctive public policies. Furthermore, the research came across specific social arrangements of local subjects which unfolded internal struggles, enabling to understand the dynamics of the Tremembé of Almofala identity process.

O gênero Geastrum Pers. (Geastraceae, Basidiomycota): ocorrência, chave taxonômica e descrições de novas espécies do Nordeste brasileiro

Geastraceae is a monophyletic family included in the gomphoid-phalloid clade, it is composed only by two genus: Geastrum and Myriostoma. These genus are closely related in their morphology and phylogeny, both showing angiocarpic basidiomata, apical stoma, basidiospores passively released by the bellows mechanism and exoperidium dehiscent in rays, these genus are distinct by the number of stomas and pedicels. Because of dehiscense of exoperidium they are popularly known as “earthstars”. Usually they occur on decomposing leaf-litter and decaying wood. They are, thus, saprophytic, with rare exceptions of ectomycorrhizal species. Geastrum is the most diverse gasteroid genus in Brazil, with an estimated 51 records. However, there are large gaps in the geographic distribution and systematics studies about the Geastrum in this country, especially because of the characteristics found in the Brazilian territory (megadiverse, hotspots and continental size), which makes it a priority area for species inventory. Thus, this work was aimed at realizing inventory of species of Geastrum, which occur in Caatinga and Northeastern Atlantic Rainforest. At least two field expeditions were realized, during about four days on rainy season of 2013 and 2014 in the areas: Reserva Biológica de Guaribas, located in Atlantic Rainforest domain, Paraíba State and Reserva Ecológica Estadual Mata do Pau Ferro, located on “Brejos Paraibanos”, Paraíba State. Furthermore, specimens deposited in the Herbarium of the Universidade Federal do Rio Grande do Norte, which were collected in Parque Nacional Vale do Catimbau, Caatinga of Pernambuco State, were analyzed. The specimens were identified according to analysis of macro and micro morphology based on specific literature. Approximately 400 basidiomata, distributed in 73 exsiccates were analyzed. 21 species were identified, 19 are in specie level, which two are proposed to new species. (Geastrum magnosporum sp. nov. e G. pusillupilosum sp. nov.) and two in genera level (sp. e aff.). We emphasize one new record for Brazil, 12 new records for Paraíba State, four new records for semiarid region in Brazil and six new records to Atlantic Rainforest relicts “Brejo de Altitude”. So, the results improved the knowledge about Geastrum in Paraíba State by 200%, 24 % in Brazilian semiarid region and 55% in Atlantic Rainforest relicts “Brejo de Altitude”, evincing that Northeastern Brazil has high species richness.

Modelagem do consumo de energia de redes de sensores sem fio usando SystemC-AMS e stateflow

This work aims at modeling power consumption at the nodes of a Wireless Sensor Network (WSN). For doing so, a finite state machine was implemented by means of SystemC-AMS and Stateflow modeling and simulation tools. In order to achieve this goal, communication data in a WSN were collected. Based on the collected data, a simulation environment for power consumption characterization, which aimed at describing the network operation, was developed. Other than performing power consumption simulation, this environment also takes into account a discharging model as to analyze the battery charge level at any given moment. Such analysis result in a graph illustrating the battery voltage variations as well as its state of charge (SOC). Finally, a case study of the WSN power consumption aims to analyze the acquisition mode and network data communication. With this analysis, it is possible make adjustments in node-sensors to reduce the total power consumption of the network.

Ferramenta para avaliação e inferência de parâmetros de redes industriais sem fio

Wireless sensor networks (WSN) have gained ground in the industrial environment, due to the possibility of connecting points of information that were inaccessible to wired networks. However, there are several challenges in the implementation and acceptance of this technology in the industrial environment, one of them the guaranteed availability of information, which can be influenced by various parameters, such as path stability and power consumption of the field device. As such, in this work was developed a tool to evaluate and infer parameters of wireless industrial networks based on the WirelessHART and ISA 100.11a protocols. The tool allows quantitative evaluation, qualitative evaluation and evaluation by inference during a given time of the operating network. The quantitative and qualitative evaluation are based on own definitions of parameters, such as the parameter of stability, or based on descriptive statistics, such as mean, standard deviation and box plots. In the evaluation by inference uses the intelligent technique artificial neural networks to infer some network parameters such as battery life. Finally, it displays the results of use the tool in different scenarios networks, as topologies star and mesh, in order to attest to the importance of tool in evaluation of the behavior of these networks, but also support possible changes or maintenance of the system.

Distribuição de derivados de petróleo por redes de polidutos: uma abordagem através de algoritmos evolucionários híbridos para um problema triobjetivo

An important problem faced by the oil industry is to distribute multiple oil products through pipelines. Distribution is done in a network composed of refineries (source nodes), storage parks (intermediate nodes), and terminals (demand nodes) interconnected by a set of pipelines transporting oil and derivatives between adjacent areas. Constraints related to storage limits, delivery time, sources availability, sending and receiving limits, among others, must be satisfied. Some researchers deal with this problem under a discrete viewpoint in which the flow in the network is seen as batches sending. Usually, there is no separation device between batches of different products and the losses due to interfaces may be significant. Minimizing delivery time is a typical objective adopted by engineers when scheduling products sending in pipeline networks. However, costs incurred due to losses in interfaces cannot be disregarded. The cost also depends on pumping expenses, which are mostly due to the electricity cost. Since industrial electricity tariff varies over the day, pumping at different time periods have different cost. This work presents an experimental investigation of computational methods designed to deal with the problem of distributing oil derivatives in networks considering three minimization objectives simultaneously: delivery time, losses due to interfaces and electricity cost. The problem is NP-hard and is addressed with hybrid evolutionary algorithms. Hybridizations are mainly focused on Transgenetic Algorithms and classical multi-objective evolutionary algorithm architectures such as MOEA/D, NSGA2 and SPEA2. Three architectures named MOTA/D, NSTA and SPETA are applied to the problem. An experimental study compares the algorithms on thirty test cases. To analyse the results obtained with the algorithms Pareto-compliant quality indicators are used and the significance of the results evaluated with non-parametric statistical tests.

Conversações políticas no youtube: junho de 2013 e circulação de sentidos nos comentários do vídeo “globo e os protestos”

This re search analyzes the talks dynamics about policy established in YouTube symbolic space. We are interested in examining the way in which the commentators of the video " Globo e os Protestos " articulated in the field intended for comments, a public space directed to the dissemination and circulation of meanings about policy issues. The video studied was published by PC Siqueira and Diego Quint eiro , during the June 2013 protests in Br azil, to direct the political understanding of the movement lived in that period. According to them, the protests had left political position and therefore the protesters should reject the coverage by TV Globo (a comunication vehicle with ideals of right) and allow the participation of political parties linked to the ideological left spectrum. This narrative generated empathy and controversy betwe en commentators, which produced in the comments, an intense argumentative process about these theses (right and left). To understand the phenomenon, we conducted an exploratory qualitative research, the main methodological procedure was a ethnomethodological discourse analysis. We seek the observation of the ways in which the commentators es tablished talks about politics in the comments space, for, thereafter , organize categories of analysis based on identified discursive recurrences. The empirical reflections are supported from discussions about the YouTube potential, while digital media com prising massive strategies and while articulating space in the engagement of individuals in political issues; also confront the aspects involved in the conversation practices that results in sociability dynamics and , especially , in conflict, on the socio - t echnical networks; and finally, we propose a reflection about the circuit actuation in which the people take ownership and realize new readings about the products received. Concluding that the use of digital media , such as YouTube, has caused significant c hanges in the forms of production and reception of symbolic products and ways in which people participate in political issues concerning life in society.