Um estudo sobre a concepção de paradoxo segundo o pensamento de Augustus de Morgan

This work aims to analyze the concept of "paradox" posed in the work of The Budget Paradox (1872) of mathematical and logical English Augustus De Morgan (1806-1871). Here it is important to note that a large part of this book consists of re-prints of a series of writings by the author in journal Athenaeum, where its performance as auditor of literature. The tests refer to some scientific work produced between the years 1489 and 1866 and the rules of selection for the composition of the work is, basically, the methodological aspects used in the completion or disclosed by such scholars. The concept of paradox is presented in two distinct moments. At first, we found a study of definitions for the term in a philosophical approach, characterizing it as something that requires further investigation; which was complemented with the classic examples of a scientific context. In the second, we present a concept advocated by De Morgan and, under this perspective, that he conceptualized the "paradox" is directly related to the non-usual methods employed in the formulation of new scientific theories. In this study some of these scientific concepts are detailed, where, through the redemption history, engaging in issues of our study Mathematics, Physics, of Logic, among others. Possession of the preliminary analysis and comparison with the design of De Morgan, it became possible to diagnose some limitations in the conceptualization suggested by the author. Further, evidenced, in front of the cases, the nonlinearity of the process of production of knowledge and hence the progress of science

Ergonomia e Odontologia: determinantes da postura corporal dos estudantes da clínica-escola de uma Universidade Federal

Posture is one of the most worrying problems dentists face. That is because of the high incidence of low back pathologies regarding the professional activity, despite the development on the field of Dental Ergonomics. This work took place at the dental schoolclinic at a Federal University, and it was grounded on the Ergonomic Principles in the workplace. Its main objective was to analyze the determinants of inadequate posture adopted by students inasmuch as the adoption of non ergonomic methods at the school-clinic may influence them to develop inadequate postures in their working environment. The analysis of the activity showed us that it requires some complex procedures in the patient s mouth. Thus, when the students carry out the activity, they start to adopt, although unconsciously, inadequate postures which will make easier the visual accuracy and the access to the operation focus. In case there is no internal (body awareness) or external warning mechanisms (the professor s or the partner s counseling) regarding posture or possible risks which lead them to self-correction, the students become vulnerable to osteomuscle disorders. The time pressure, because the students are expected to perform their task in a predetermined clinical time. The facts related to each patient s variability as well as the stress caused by the expectations to get their work done in time make the students to advance it believing they will waste time if they help their partners or using an indirect view. We could also notice that there was no assistant to perform the job of minor ones, as well as there was no professor who could actually connect the knowledge on Ergonomics to its working practice. The conclusions of this work stand out the need of widen the discussion at the academic environment regarding health professionals in places such as universities. The ergonomic principles in the workplace aim a multidisciplinary analysis based on the experience of students, professors, staff members and janitors that can contribute to some reflection upon the issue and consequently actions which will bring positive changes at the working environment