Dual descriptions of spin two massive particles in D=2+1D=2+1 via master actions

In the first part of this work we show the decoupling (up to contact terms) of redundant degrees of freedom which appear in the covariant description of spin two massive particles in $D=2+1$. We make use of a master action which interpolates, without solving any constraints, between a first, second and third order (in derivatives) self-dual model. An explicit dual map between those models is derived. In our approach the absence of ghosts in the third order self-dual model, which corresponds to a quadratic truncation of topologically massive gravity, is due to the triviality (no particle content) of the Einstein-Hilbert action in $D=2+1$. In the second part of the work, also in $D=2+1$, we prove the quantum equivalence of the gauge invariant sector of a couple of self-dual models of opposite helicities (+2 and -2) and masses $m_+$ and $m_-$ to a generalized self-dual model which contains a quadratic Einstein-Hilbert action, a Chern-Simons term of first order and a Fierz-Pauli mass term. The use of a first order Chern-Simons term instead of a third order one avoids conflicts with the sign of the Einstein-Hilbert action.Comment: title and abstract slightly modified, 3 references added, comments on interactions include

Static potential in scalar QED3_3 with non-minimal coupling

Here we compute the static potential in scalar $QED_3$ at leading order in $1/N_f$. We show that the addition of a non-minimal coupling of Pauli-type (\eps j^{\mu}\partial^{\nu}A^{\alpha}), although it breaks parity, it does not change the analytic structure of the photon propagator and consequently the static potential remains logarithmic (confining) at large distances. The non-minimal coupling modifies the potential, however, at small charge separations giving rise to a repulsive force of short range between opposite sign charges, which is relevant for the existence of bound states. This effect is in agreement with a previous calculation based on M$\ddot{o}$ller scattering, but differently from such calculation we show here that the repulsion appears independently of the presence of a tree level Chern-Simons term which rather affects the large distance behavior of the potential turning it into constant.Comment: 13 pages, 3 figure

Advances and challenges in innovation studies

The article discusses recent advances and future challenges in innovation studies. First, it separately considers four main strands of research, studying innovation at the organizational, systemic, sectoral and macroeconomic levels. Then, considering the field as a whole, the article points to the existence of important neglected topics and methodological challenges for future research. In fact, several fundamental issues are still unexplored, such as the co-evolution between technological and institutional change; the role of demand; and the impacts of innovation on individual and collective welfare. There are also important methodological challenges, such as the need for more systematic interactions between the different levels of analysis; the importance of an interdisciplinary approach to the study of technological and institutional changes; and the search for a combination of contingent explanations based on case studies with general analytical results based on econometric and formal models

Morfo-anatomia da semente de Bauhinia monandra Kurz. (Leguminosae-Caesalpinioideae).

Bauhinia monandra, espécie popularmente conhecida na Amazônia como pata-de-vaca, é indicada entre outros usos como planta medicinal nessa região. Visando contribuir para um melhor conhecimento foram coletadas sementes dessa espécie do banco de germoplasma da EMBRAPA - CPATU, Amazônia Oriental, no estado do Pará. O estudo morfo-anatômico revelou sementes estenospérmicas, oblongas, base arredondada, margem inteira, ápice assimétrico, perfil convexo pouco acentuado e hilo em forma de "V" na região apical. A testa é monocrômica, brilhante, lisa e constituída por dois estratos epidérmicos; linha lúcida presente. O endosperma é contínuo, espesso, adnato a testa. O embrião é axial e invaginado, apresenta dois cotilédones foliáceos e eixo embrionário com plúmula rudimentar e radícula imperceptível. Foram vistos grãos de amido no interior dos cotilédones

Anatomia foliar de croton cajucara Benth. (Euphorbiaceae) como contribuição ao estudo farmacognóstico de plantas da região amazônica.

As folhas de Croton cajucara popularmente conhecida por "sacaca", são utilizadas na medicina popular devido às propriedades curativas que lhe são atribuídas, tais como antiinflamatório, diurético e anticolesterolemiante. Objetivando contribuir com estudos fitoterápicos e cosméticos, uma vez que o óleo essencial de C. cajucara é utilizado como fixador de perfumes, realizou-se estudo anatômico da folha desta espécie, destacando-se as estruturas secretoras de óleo essencial. O material pesquisado foi coletado no Banco de Germoplasma da EMBRAPA Amazônia Ocidental-AM e na área agrícola da Faculdade de Ciências Agrárias da Universidade Federal do Amazonas. Aepiderme foliar é constituída por apenas um estrato de células de formato irregular, justapostas, com paredes periclinais e anticlinais sinuosas, revestidas por uma cutícula lisa e espessa e uma camada de cera epicuticular. A folha é anfiestomática com estômatos do tipo paracítico. Em ambas as faces foram observados tricomas do tipo multiradiado, lepidoto e estrelado. Células secretoras de óleo essencial foram encontradas na base dos tricomas do tipo estrelado e, freqüentemente, dispersas no mesofilo. Por meio da técnica de extração por arraste de vapor d'água obteve-se aproximadamente 1mL de óleo por 1 kg de folhas frescas, cujo teor de linalol foi de 37,6%, por cromatografia gasosa/espectrometria de massa.Disponível também on-line

Intelligent fault diagnosis of marine equipments

The automatic and intelligent diagnosis of faults in marine equipment is a task that is considered to be of great importance considering the numerous tasks that are associated with professionals working on ships. The possibility of including automatic and intelligent processes on a ship makes it possible to monitor equipment more effectively and make more informed decisions. This approach has received a lot of attention in the academic and industrial fields as it can offer considerable economic and safety advantages. Some fault diagnosis approaches can be found in the literature, where mathematical and control theory models are taken into account. However, in complex processes not all their characteristics are always known exactly, so mathematical modelling of processes is an extremely difficult task. Fault diagnosis can therefore be based mainly on data or heuristic information. The inherent characteristics of fuzzy logic theory make it suitable for processing this type of information, which is why it will be used to model processes and diagnose faults in a marine equipment valve. The fault diagnosis architecture proposed in this paper is based on analysing the discrepancy signals obtained between the outputs of the fuzzy models and the process data under study. These discrepancies, the residuals, are indicative of equipment fault. The proposed fault diagnosis architecture uses an intelligent decision-making approach to indicate the occurrence of faults. In this paper, this architecture will be used to diagnose abrupt faults in a marine equipment valve.Peer Reviewe

Manuel Castells and Informationalism

Understanding how the social appropriation of information and communication technologies came to define the contemporary period is critical for researchers and practitioners of innovation, business and management. This paper explores how the work of Manuel Castells as a social theorist provides the intellectual tools and the encompassing lenses to enable the study and navigate the process of structural transformation in which our lives have been engulfed from the 1970s onwards. Castells’ procedure of considering technology, social usages and structural history leads him to a key conceptual result: the introduction of the “Network Society” concept. His ideas have most notably been applied to the field of communications studies, which he analyses through the prism of power. However, these insights are not containable in one single discipline as the implications of informationalism stretch in a variety of directions, making other dimensions of society amenable to the network perspective. Organisational studies are one topic in which this line of enquiry may fruitfully be pursued.info:eu-repo/semantics/acceptedVersio

PIBID música e prática pedagógico-musical: experiências de ensino envolvendo cotidiano e prática musical

Anais do II Seminário Seminário Estadual PIBID do Paraná: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes — Foz do Iguaçu: Unioeste; Unila, 2014O trabalho apresenta a experiência de atuação no subprojeto de Música do PIBID da Universidade Estadual de Ponta Grossa, realizado em uma escola da rede pública de ensino do município, e tem como principal objetivo discutir duas atividades realizadas, sendo uma sobre ‘Rock e os elementos formais do som’ e a outra referente a uma experiência de prática musical com os alunos, que integrava canto, violão, percussão e flauta. Foi possível avaliar que a maioria dos alunos conseguiu assimilar o conteúdo mais efetivamente por ter sido trabalhado com recursos que fazem parte do seu cotidiano e por ser um contexto mais próximo da sua realidade auditiva. Os momentos de prática musical proporcionaram reflexões sobre a importância do planejamento no momento da realização das atividades e a necessidade deste ser flexível e estar elaborado detalhadament