856 resultados para Empirical study


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The use of wireless local area networks, called WLANs, as well as the proliferation of the use of multimedia applications have grown rapidly in recent years. Some factors affect the quality of service (QoS) received by the user and interference is one of them. This work presents strategies for planning and performance evaluation through an empirical study of the QoS parameters of a voice over Internet Protocol (VoIP) application in an interference network, as well as the relevance in the design of wireless networks to determine the coverage area of an access point, taking into account several parameters such as power, jitter, packet loss, delay, and PMOS. Another strategy is based on a hybrid approach that considers measuring and Bayesian inference applied to wireless networks, taking into consideration QoS parameters. The models take into account a cross layer vision of networks, correlating aspects of the physical environment, on the signal propagation (power or distance) with aspects of VoIP applications (e.g., jitter and packet loss). Case studies were carried out for two indoor environments and two outdoor environments, one of them displaying main characteristics of the Amazon region (e.g., densely arboreous environments). This last test bed was carried out in a real system because the Government of the State of Pará has a digital inclusion program called NAVEGAPARÁ.

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The possibility of experimental approach of mental phenomena continues to be discussed nowadays by philosophers, psychologists and neuroscientists. According to the concept that mental phenomena are resulting from brain activity, therefore organic phenomena, the objective of this essay is to show that empirical study of mental phenomena, especially consciousness, is not only possible, but desirable, despite the limitations found in Neuroscience field.

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Researches show high rates of school failure on the part of students who are unable to learn, referring to them as the idea of an incapable individual and intended not to achieve the goals proposed during the school year. Among the most varied problems posed by teachers and that are instilled in students in order to justify the poor performance of the same, we find Disorder Attention Deficit Hyperactivity Disorder (ADHD). Faced with this problem the objective was to investigate teachers‟ conception of the second year of primary education on ADHD, knowing well the mechanisms of identification, confirmation and referral of these cases, as well as the appropriate treatment and teaching practices suggested. To achieve the proposed objective a literature search was performed supplemented by an empirical study in which we used two instruments to collect data: interviews and observation. The study included empirical two teachers from a state school and two teachers from a private school, all of a midsize city in São Paulo. The interviews showed that teachers of second grade of elementary school consider ADHD a neurological problem in order to be addressed, however, chose not to speak about the treatment carried out by drugs. The observations revealed that the discourse of these teachers are away from their practices, it is worth noting that the differences in these two situations studied - state and private network - are so disparate and interfere in this important teaching practice

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The aim of this study is to investigate the significance of educational practices aimed at children in non formal education, in this case, specifically, the hospital context. The chosen methodology is part of an investigation conducted in two phases. In the first phase was carried out a theoretical stage, scientifically based studies guided by an historical-cultural and Sociology of Childhood, enabling placement on the particularities of children, the playfulness and the positioning of Pedagogy in the hospital. After this theoretical study was performed the second phase, with the completion of an empirical study with a research and intervention in a hospital playroom, in a public hospital considered a regional center in the northwestern city of São Paulo. The methodological procedures adopted for this empirical study were participant observation, interviews, action research and a questionnaire. Participant observation and action research are conducted within the brinquetodeca in five meetings with about 15 children, interviews were conducted with three family members and the questionnaire was applied to a healthcare professional. Among the results we can mention the following findings: a confirmation of the necessity of work in the hospital directing playful adaptations for the preservation and development of children's learning, and recent publications are scarce about the Hospital Education and underscore the need for the professional practice of education in non-school, the educational activities carried out reveals the possibilities of offering the child the continuation of their educational activities involving the playful and educational, the international and national literature on educational practices in the hospital allow to check ...(Complete abstract click electronic access below)

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The aim of this study is to investigate the importance of playfulness and interpersonal relationships at school. The methodology of the study was divided into three phases: the first phase was a survey and analysis of studies in the field of childhood playfulness and interpersonal relationships, from a reference from a multidisciplinary reference, supported in the areas of Educational Psychology and history and sociology of childhood and the second was the realization of an empirical study in a classroom of 1st year of elementary school, in which we use as instruments the use of participant observation, semistructured interviews with six selected students and collected school records and the third phase focused on analysis of data from a qualitative perspective with dialogues between literature in the area and data analysis. Among the main directions of study have the following problematizations: school world not adapted in order to enroll in elementary school, lack of playfulness, interpersonal relations in this context. By analyzing this information and the main results we have the advancement of education in the new environment where playfulness, as the jokes were not taken during the year by the teacher, but remained present in the actions of children, highlighting also the symbolism and sets of rules. Interpersonal relationships were present at all times, between being a friend, share and discuss, through the interactions. Therefore, we consider that there are still challenges to deal with this new child who enters school as it relates to your mood, the play, study or friendship

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This research, based on authors such as Was (1999), Guarnieri (1996 and 2005), Freitas (2002 and 2007) argue that the understanding of teacher education as a complex continuum aimed at understanding the initiation of the educational performance in the first five years of professional practice, by analyzing the history of teaching teachers early in their career. As we contemplate the specific objectives of interest to examine the training received to enter and work in the classroom and the experiences in teaching at undergraduate students. To perform the empirical study we adopted the use of semi-structured, guided by an outline of issues significant to the conduct of the respondents' narratives. The main results can highlight the difficulties encountered at the beginning of the educational performance are recurrent, data analysis shows that there is a significant increase in the duties of the teacher. With the study arrives at the premise that we must rethink the quality and structure of training courses aimed at improving the quality of performance of professional education, but for this to occur there must be deepening of studies and improvements not only in initial training and in continuing education courses. It is understood here that the training is not solely responsible for the current educational scene, which encompasses the question of the beginner there are many issues to be studied, such as public policies, structuring the curriculum, pay, but the training is beginning to there are faculty prepared to act

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Background: Once multi-relational approach has emerged as an alternative for analyzing structured data such as relational databases, since they allow applying data mining in multiple tables directly, thus avoiding expensive joining operations and semantic losses, this work proposes an algorithm with multi-relational approach. Methods: Aiming to compare traditional approach performance and multi-relational for mining association rules, this paper discusses an empirical study between PatriciaMine - an traditional algorithm - and its corresponding multi-relational proposed, MR-Radix. Results: This work showed advantages of the multi-relational approach in performance over several tables, which avoids the high cost for joining operations from multiple tables and semantic losses. The performance provided by the algorithm MR-Radix shows faster than PatriciaMine, despite handling complex multi-relational patterns. The utilized memory indicates a more conservative growth curve for MR-Radix than PatriciaMine, which shows the increase in demand of frequent items in MR-Radix does not result in a significant growth of utilized memory like in PatriciaMine. Conclusion: The comparative study between PatriciaMine and MR-Radix confirmed efficacy of the multi-relational approach in data mining process both in terms of execution time and in relation to memory usage. Besides that, the multi-relational proposed algorithm, unlike other algorithms of this approach, is efficient for use in large relational databases.

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Nowadays it is increasingly required insertion History of Science on content to be worked in education, which raises many doubts and difficulties on the teachers did not have that content in their initial training. This work results from a qualitative empirical study aimed to investigate how a teacher of Biology and Science in a public school in the city of Bauru - SP was not in their initial training courses relating to the History of Science, mobilizes their knowledge to enter such an approach in their teaching practice. In the research methodology used as its theme the history of DNA present in the materials and also conduct open interviews and field notes to identify the knowledge involved in teaching practice and was adopted as the theoretical framework of Maurice Tardif’s Docent Knowledge. The results showed that even with difficulties arising from gaps in initial training, the teacher resorted to their experiential knowledge to meet these needs in addition to appropriate knowledge from the programs and textbooks, but its shortcomings make it difficult to analyze more critically. Thus, these data lead us to a reflection on the role of textbooks for these teachers is the process by which the consolidation of the knowledge they constructed.

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The Folha Universal, newspaper produced by the Igreja Universal do Reino de Deus (Iurd, abbreviation in Portuguese for Universal Church of the Kingdom of God), reaches an average weekly circulation from 2.5 to 3.5 million copies. Studies indicate that the Folha Universal is not merely an institutional newspaper. It is systematically dedicated to be a source of political information to their readers, in order to publicize candidates and politicians who defend the Iurd’s proposals for the Brazilian public life. This paper describes results of an empirical study on the frames built by the Folha Universal about the social demands, economic and political governance considered as priorities to the public management by the Iurd around five themes of analysis: public safety; children and adolescents care; public health; environment; politics and economy. The results indicate that, as characteristics of the Folha Universal in the four months prior to the 2010 Brazilian elections, aspects that differ from those indicated by previous studies on the newspaper. Previously detected in the pages of Folha Universal as a mean for finding solutions to social problems, the theology of prosperity was in our sample replaced by the formulation of public policies.

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The internet, with its hypertext and multimedia features, can be a support for the dissemination of information in an attractive way, which may contribute to the strengthening of democracy. Recent innovation, social networks have been explored also as a resource to attract the interest of the broader public to information about public policies. This paper presents and discusses the results of an empirical study which assessed, through content analysis, the breadth and depth of information offered by the Sao Paulo state government and the federal government in texts accessed through Twitter to publicize purposes, lines of action and limits of public policy in the areas of welfare, health, education and environment . The results indicate that the information available tend to focus mainly on goals, resources and current actions of policies, whereas there can be found few data on planned features, relation between cost and effectiveness and user satisfaction.

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The Participatório: Observatório Participativo da Juventude (Participatory: Observatory on the Youth Participation) is an online platform created in August 2013 as part of the response of the General Secretariat of the Presidency of the Republic of Brazil to the protests which took Brazilian streets in the middle of that year. This paper analyses the Participatório against the theoretical context brought by studies of digital activism and social movements. We revise relevant theories and present results of an empirical study indicating parameters to assess whether the apparent goals of the platform would have been reached. The data suggest that the initiative could achieve its purposes as long as it secures the efficacy of future improvements.

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As software evolves, engineers use regression testing to evaluate its fitness for release. Such testing typically begins with existing test cases, and many techniques have been proposed for reusing these cost-effectively. After reusing test cases, however, it is also important to consider code or behavior that has not been exercised by existing test cases and generate new test cases to validate these. This process is known as test suite augmentation. In this paper we present a directed test suite augmentation technique, that utilizes results from reuse of existing test cases together with an incremental concolic testing algorithm to augment test suites so that they are coverage-adequate for a modified program. We present results of an empirical study examining the effectiveness of our approach.