Loop quantization of a 3D Abelian BF Model with σ-Model Matter

Não foi disponibilizado o número de página, mês de publicação.The main goal of this work is to explore the symmetries and develop the dynamics associated with a 3D Abelian BF model coupled to scalar fields submitted to a sigma model like constraint, at the classical and quantum levels. Background independence, on which the model is founded, strongly constrains its nature. We adapt to the present model the techniques of Loop Quantum Gravity in order to construct its physical Hilbert space and its observables

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

INFLUENCE OF ASPECT RATIO IN THE TURBULENT CONVECTION IN CAVITIES

The purpose of this study is to know the air distribution in a conditioned room, through the numerical investigation of the influence of aspect ratio in the thermal and fluid dynamics behavior of a turbulent flow. To achieve that objective, some simulations were done of the flow inside a rectangular room, where the air enters through an opening in the top of one wall and leaves the room through an opening in the bottom of the opposite wall. The Reynolds mean equations are used, with the turbulence model RSM BSL (Reynolds Stress Model - Baseline) to solve four cases, with different geometries. It was concluded that, in general, the turbulence model used in this work is capable to predict quite well the fluid dynamics behavior of the flow, which is influenced by the room length, but not by its width

The role of European «ro-ro» port terminals in the automotive supply chain management

http://www.sciencedirect.com/science/article/B6VG8-4V5XNYN-2/2/e3b9cc9ae1d3da27edb4977da8fc19e

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