Classical properties of algebras using a new graph association

We study the relation between algebraic structures and Graph Theory. We have defined five different weighted digraphs associated to a finite dimensional algebra over a field in order to tackle important properties of the associated algebras, mainly the nilpotency and solvability in the case of Leibniz algebras

Management of the Rice Tungro Virus Vector \u3ci\u3eNephotettix virescens\u3c/i\u3e (Homoptera: Cicadellidae) with Controlled-Release Formulations of Carbofuran

Field trials were conducted in lowland flooded rice in the Philippines to evaluate a number of carbofuran controlled-release formulations in comparison with commercial formulations. The test formulations were based on a biodegradable matrix of pine kraft lignin and were used as granules of different sizes and also in the form of small strips. The release rates were assessed under field conditions by bioassaying rice plants in the field, using adult rice green leafhopper, Nephotettix virescens Distant. The lignin formulations with a high level of active ingredient (15–45% by weight) gave as good or better control than the commercial 3% granules in tests based on three application techniques: broadcast into the floodwater, soil incorporation, and root zone injection. The improvements in control levels of green leafhoppers were most marked with soil incorporation and root zone application. The best lignin-based formulation reduced levels of tungro virus infection from 23% for a conventional flowable carbofuran formulation to 1.0% at an application rate of 0.5 kg (AI)/ha. At the same rate, the grain yield was increased from 3.56 t/ha to 5.5 t/ha, using the controlled-released formulation

Contraceptive use and sexual function: a comparison of Italian female medical students and women attending family planning services

Objectives: The aims of the study were to understand how education relates to contraceptive choice and how sexual function can vary in relation to the use of a contraceptive method. Methods: We surveyed female medical students and women attending a family planning service (FPS) in Italy. Participants completed an online questionnaire which asked for information on sociodemographics, lifestyle, sexuality and contraceptive use and also included items of the Female Sexual Function Index (FSFI). Results: The questionnaire was completed by 413 women (362 students and 51 women attending the FPS) between the ages of 18 and 30 years. FSFI scores revealed a lower risk of sexual dysfunction among women in the control group who did not use oral hormonal contraception. The differences in FSFI total scores between the two study groups, when subdivided by the primary contraceptive method used, was statistically significant (p < 0.005). Women using the vaginal ring had the lowest risk of sexual dysfunction, compared with all other women, and had a positive sexual function profile. In particular, the highest FSFI domain scores were lubrication, orgasm and satisfaction, also among the control group. Expensive contraception, such as long-acting reversible contraception, was not preferred by this young population, even though such methods are more contemporary and manageable. Compared with controls, students had lower compliance with contraception and a negative attitude towards voluntary termination of pregnancy. Conclusion: Despite their scientific knowledge, Italian female medical students were found to need sexual and contraceptive assistance. A woman's sexual function responds to her awareness of her body and varies in relation to how she is guided in her contraceptive choice. Contraceptive counselling is an excellent means to improve female sexuality

Gênero e saúde: perfil e tendências da produção científica no Brasil

The differences in health between men and women have been object of great interest, but interpretations tend to be naturalized and essentialists. Gender-oriented studies have criticized this literature and offered new analythical alternatives. The present study was intended to describe the profile and trends of scientific production on gender and health in Brazil. Data sources comprised the Research Groups Directory of Conselho Nacional de Desenvolvimento Científico e Tecnológico (National Research Council), CAPES (Coordination for the Improvement of Higher Education Personnel) Thesis Bank, and four journals available in SciELO - Scientific Eletronic Library Online. Fifty-one groups with at least one line of research in the subject were identified, with regional and institutional concentrations. The results confirmed the marked growth of scientific production in this field as 98 master and 42 doctoral dissertations and 665 articles on gender and health were retrieved. Women authored 86.0% and 89.0% of doctoral and master dissertations respectively, and 70.5% of the articles. Most were published in the 2000s when diversification of the studied topics was also seen. The studied subjects can be divided into five subgroups: reproduction and contraception; gender and violence; sexuality and health with emphasis on STD/AIDS; work and health, including domestic and night work; other emergent or less explored topics. There are major political, epistemological and methodological challenges for strengthening these advancements. The gender perspective offers possibilities for enlightment of theoretical dilemmas in public health. Furthermore, it can be added to other intellectual and political efforts towards understanding health and its determinants and fighting against inequalities and for social justice.As diferenças em saúde entre homens e mulheres têm sido objeto de grande interesse, mas as interpretações tendem a ser naturalizadas e essencialistas. Os estudos de gênero têm criticado essa literatura, oferecendo alternativas de análise promissoras. Assim realizou-se estudo com o objetivo de descrever o perfil e as tendências da atividade científica sobre gênero e saúde no Brasil. Foram utilizados dados do Diretório de Grupos de Pesquisa do Conselho Nacional de Desenvolvimento Científico e Tecnológico, do Banco de Teses da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, e quatro periódicos da área da saúde. Foram identificados 51 grupos com pelo menos uma linha de pesquisa na temática, com concentração regional e institucional. Os resultados confirmam o crescimento acentuado da produção científica, sendo localizadas 98 dissertações, 42 teses e 665 artigos sobre gênero e saúde. As mulheres são autoras de 86,0% das teses e 89,0% das dissertações e 70,5% dos artigos. A maioria dos trabalhos acadêmicos foi divulgada na década de 2000, quando ocorreu também ampliação das questões abordadas. Os temas podem ser reunidos em cinco subgrupos: reprodução e contracepção; violência de gênero; sexualidade e saúde, com ênfase nas DST/Aids; trabalho e saúde, incluindo trabalho doméstico e trabalho noturno; outros temas emergentes ou pouco explorados. São grandes os desafios políticos, epistemológicos e metodológicos para consolidação dos avanços. A perspectiva de gênero oferece amplas possibilidades de enriquecimento da reflexão teórica na saúde coletiva, podendo-se somar a outros esforços intelectuais e políticos para a compreensão da saúde e seus determinantes na luta contra as desigualdades e pela justiça social

Agricultura de montanha: uma prioridade latente na agenda da pesquisa brasileira.

Introdução; Breve histórico do reconhecimento da importância das montanhas; Definição de montanha; Especialidades dos ambientes de montanha; Desenvolvimento sustentável em ambientes de montanha; Agricultura de montanha; Considerações finais

Pagamento por serviços ambientais em ambientes de montanha

Publicado no Cadernos de Agroecologia, v. 6, n. 2, 2011

O potencial da cajucultura nas savanas tropicais.

Cajueiro;Savanas;Savanas brasileiras-O cerrado;Caracterizacao ambiental dos cerrados; Cajueiro nos cerrados;Atuacao da Embrapa Agroindustria Tropical nos cerrados;Oportunidades para a industrializacao do caju nas savanas tropicais.bitstream/item/35436/1/Dc-044.pd

The confined hydrogen atom with a moving nucleus

We study the hydrogen atom confined to a spherical box with impenetrable walls but, unlike earlier pedagogical articles on the subject, we assume that the nucleus also moves. We obtain the ground-state energy approximately by means of first--order perturbation theory and by a more accurate variational approach. We show that it is greater than the one for the case in which the nucleus is clamped at the center of the box. Present approach resembles the well-known treatment of the helium atom with clamped nucleus

Estoques de carbono e nutrientes e macrofauna invertebrada em argissolo sob sistemas agroflorestais e agricultura de corte e queima no norte do Piauí.

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