562 research outputs found
Relating air Pollution and Respiratory Diseases Occurrences.
info:eu-repo/semantics/publishedVersio
An evolutionary approach for the motion planning of redundant and hyper-redundant manipulators
The trajectory planning of redundant robots is an important area of research and efficient optimization algorithms are needed. The pseudoinverse control is not repeatable, causing drift in joint space which is undesirable for physical control. This paper presents a new technique that combines the closed-loop pseudoinverse method with genetic algorithms, leading to an optimization criterion for repeatable control of redundant manipulators, and avoiding the joint angle drift problem. Computer simulations performed based on redundant and hyper-redundant planar manipulators show that, when the end-effector traces a closed path in the workspace, the robot returns to its initial configuration. The solution is repeatable for a workspace with and without obstacles in the sense that, after executing several cycles, the initial and final states of the manipulator are very close
Important variables when studying the influence of particulate matter on health.
info:eu-repo/semantics/publishedVersio
An evolutionary approach to the trajectory planning of redundant robots
Several kinematic techniques for the trajectory optimization of redundant manipulators control the gripper using the pseudoinverse of the Jacobian. Nevertheless, these algorithms lead to a kind of chaotic motion with unpredictable arm configurations. This paper presents a new technique for solving the inverse kinematics problem for redundant manipulators that combines the closed-loop pseudoinverse method with genetic algorithms.N/
Fractional-order harmonics in the trajectory control of redundant manipulators
Redundant manipulators are superior to classical arms because they allow the trajectory optimization, the obstacle avoidance, and the resolution of singularities. For this type of manipulators, the kinematic control algorithms adopt generalized inverse matrices that may lead to unpredictable responses. Motivated by these problems this paper studies the complexity revealed by the trajectory planning scheme when controlling redundant manipulators. The result reveals a chaotic phenomenon and the existence of fractional order sub-harmonics in the robot signals.N/
Induced response of soybeans to phakopsora pachyrhizi inoculation and alternativa products used in organic production system.
Alternative products for soybean Asian rust (Phakopsora pachyrhizi) management in organic production system were tested. Among them, calda viçosa (CV, mixture of Cu, Zn and Mg sulfates), Fish Fertil" (FF, hydrolyzed organic based on crustacean shell and marine fish, rich in chitosan), and sodium silicate (55) were selected for defense induction studies. Sovbean sown in greenhouse, at V3 development stage, was sprayed with alternative products and inoculated or not-inoculated with spores of P. pachyrhizi. Control plants were neither sprayed with products nor fungus inoculated. At O (before treatment) and 72, 96 and 120 hours after treatments, leaves were collected, extracted in MeOH, filtered, and HPLC injected for identification and quantification of compounds. In general, FF + fungus plant treated increased isoflavone concentrations and responded faster than the other treatments. Malonyl genistin, malonyl daidzin and malonyl glycitin concentrations of were approximately, four and 90 times (72h) and two (96h) times greater, respectively, compared to previous analysis, in fungus + FF treated plants. In this treatment, genistein and daidzein concentration also increased at 72h after treatment. Acethyl daidzin concentration increased in most of treatments, but was bigger in FF + fungus, 72h after treatment. Aglycones (genistein, daidzein and glycitein) concentration was lower compared to glycosides. However, FF has been exhaustively tested for management of phytopathogens in flowers and fruits, its role in soybean disease management needs additional experiments. Thus, for further elucidation P. pachyrhizi management by using FF,tests with pure chitosan is the next step of our studies
Implicação do ácido salicílico na indução de compostos de defesa no controle da ferrugem asiática da soja.
Poster
Por uma história transnacional da sociologia: entrevista com Gisèle Sapiro
Gisèle Sapiro is Director of Research at the CNRS (National Center for Scientific Research) and Director of Studies at the EHESS (European Center for Sociology and Political Science) since 2011, CNRS 2021 Silver Medal. She defended her thesis in 1994 under the guidance of Pierre Bourdieu, mobilizing the concept of field to understand the structural history of the field of literature. Her training and contact with Bourdieu himself and his work make Sapiro one of the successors of the Bourdieusian legacy in France. Sapiro’s works address themes such as the autonomy of fields, the political role of writers and intellectuals, and the circulation of knowledge in an international perspective, especially in relation to Bourdieu’s ideas and especially in the United States. The purpose of this interview with Gisèle Sapiro is to put into perspective the different ways of reading and interpreting Pierre Bourdieu’s work resulting from its translation and its appropriation in Brazil and in the world from the point of view of a specialist who, while bringing her own contributions to critic sociology, has greatly contributed to the dissemination of Bourdieusian ideas. Sapiro’s work deserves the attention of all those who share her intellectual enthusiasm and lay the foundations for a transnational history of sociology.Gisèle Sapiro é diretora de pesquisa e medalhista de prata no Centro Nacional de Pesquisa Científica (CNRS) e diretora de estudos no Centro Europeu de Sociologia e Ciência Política (EHESS) desde 2011. Defendeu sua tese em 1994 sob a orientação de Pierre Bourdieu, mobilizando o conceito de campo para compreender a história estrutural da literatura. Sua formação e contato com Bourdieu e com sua obra tornam Sapiro uma das sucessoras do legado bourdieusiano na França. Os trabalhos de Sapiro abordam temas como a autonomia dos campos, o papel político dos escritores e intelectuais e a circulação dos saberes em uma perspectiva internacional, sobretudo no que concerne às ideias de Bourdieu e notadamente nos Estados Unidos. O objetivo da entrevista com Gisèle Sapiro é colocar em perspectiva as diferentes maneiras de ler e interpretar a obra de Pierre Bourdieu, consequências das distinções de tradução e de apropriação no Brasil e no mundo, a partir do ponto de vista de uma especialista que, sem deixar de trazer suas próprias contribuições para a sociologia crítica, muito cooperou para a difusão das ideias bourdieusianas. O trabalho de Sapiro merece a atenção de todos aqueles que compartilham seu entusiasmo intelectual e estabelecem as bases para uma história transnacional da sociologia
Socialização de habitus: gênero e geração nas elites paulistanas
The objective of the article is to bring information about the socialization of gender in four generations of the São Paulo elite in the 20th and 21st centuries. This is the analysis of data collected in the research Thought and cultural practices of the elite paulistana. The intention is to problematize the socializing experiences of men and women - straight and homosexual - inquiring about the possible transformations of the forms of power hierarchy in these groups from the gender habitus. The data were collected in interviews and questionnaires, with a qualitative look, in a group of 48 people. The main hypothesis is based on Pierre Bourdieu’s theory of capital, among others, and its subjective forms of construction of habitus dispositions. It is noteworthy, on the one hand, that people’s generations and gender have undergone significant changes, indicating individual and social ruptures with some established standards for their gender or generation. On the other hand, it is also indicated the permanence of a practical sense that continues to guarantee status positions in all generations due to their expertise, subjectivities and family background.O objetivo do artigo é trazer informações acerca da socialização de gênero em quatro gerações da elite paulistana do século XX e XXI. Trata-se da análise de dados recolhidos na pesquisa Pensamento e práticas de cultura da elite paulistana. A intenção é problematizar experiências socializadoras de homens e mulheres — hetero e homossexuais — indagando sobre as possíveis transformações das formas de hierarquia de poder nestes grupos a partir dos habitus de gênero. Os dados foram recolhidos em entrevistas e questionários, com um olhar qualitativo, aplicados em um grupo de 48 pessoas. A hipótese principal apoia-se na teoria dos capitais de Pierre Bourdieu, entre outras, e suas formas subjetivas de construção de disposições de habitus. Destaca-se, por um lado, que as gerações e o sexo das pessoas passaram por mudanças expressivas, indicando rupturas individuais e sociais com alguns padrões estabelecidos para seu sexo ou geração. Por outro lado, indica-se também a permanência de um sentido prático que continua garantindo em todas as gerações as posições de status em função de suas expertises, subjetividades e berço familiar
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