Analytical vectorial structure of hollow Gaussian beams in the far field

The analytical vectorial structure of HGB is investigated in the far field based on the vector plane wave spectrum and the method of stationary phase. The energy flux distributions of HGB in the far-field, which is composed of TE term and TM term, are demonstrated. The physics pictures of HGB is illustrated from the vectorial structure, which is important to understand the theoretical aspects of both scalar and vector HGB propagation. (c) 2008 Optical Society of America.

Propagation properties of a hard-edged diffracted beam generated by a Gaussian mirror resonator

Based on the scalar diffraction theory, the propagation and focusing properties of a hard-edged diffracted beam generated by a Gaussian mirror resonator were investigated. Explicit expressions for the field distribution of the truncated beam that propagates through a paraxial optical ABCD system were derived in detail. Numerical examples are given to illustrate our analytical results. (c) 2006 Optical Society of America.

Propagation properties of beam generated by Gaussian mirror resonator

Based on scalar diffraction theory, propagation properties of beam generated by Gaussian mirror resonator were investigated. Explicit expressions for the field distribution of the beam that propagate through a paraxial optical ABCD system were derived and numerical examples were given to illustrate our analytical results. (c) 2005 Elsevier B.V. All rights reserved.

Entre amigos e inimigos: raízes da relação com as normas no Rio de Janeiro

Neste estudo interessa a formação social do Rio de Janeiro, bem como suas expressões em métodos de controle social, com foco no trato da legalidade e suas peculiaridades - entre elas e, principalmente, a relação dos indivíduos com as normas e vice-versa. Após explanações sobre a dualidade amigos x inimigos aplicada no trato legal, se analisará a existência de um possível Estado de exceção que para alguns autores se tornou permanente. Entendendo-se que modelos e padrões de repressão e policiamento que atravessaram as épocas e continentes desembocaram nos dias de hoje, (visto que as mudanças de valores sociais tenham demarcado claramente alguns institutos formais ou materiais refletores das nuanças do poder e do uso da força e da Justiça como sua última legitimadora), foi necessário percorrer a via analítica histórica para uma melhor compreensão dos fenômenos estudados. Se tratará da Inquisição e de todo o período aristocrático brasileiro, encerrando a pesquisa nas prévias da república, visando-se frisar a aplicabilidade de ideias e conceitos perenes relativos à normatividade e os padrões democráticos e aristocráticos que ora parecem duelar e ora se sobrepor no imaginário social brasileiro. Espera-se, assim, abrir caminho para uma micro-sociologia policial a ser tratada em pesquisas futuras. Nesse sentido, por fim, a ideia da guerra ao crime será trazida como hipótese a ser verificada, buscando-se seus efeitos diretos, indiretos e colaterais eventualmente identificados. Serão usadas como apoio à empreitada sociológica que ora apenas se inicia: História, Criminologia, Antropologia e Direito Penal.

Analytical method development for the uptake study of different organic pollutants by crops cultivated in compost-amended soils

256 p.

Fluidic flow delay by ionogel passive pumps in microfluidicpaper-based analytical devices

[EN] A new concept for fluid flow manipulation in microfluidic paper-based analytical devices ( µPADs) is presented by introducing ionogel materials as passive pumps. µPADs were fabricated using a new doubleside contact stamping process and ionogels were precisely photopolymerised at the inlet of the µPADs.The ionogels remain mainly on the surface of the paper and get absorbed in the superficial paper-fibers allowing for the liquid to flow from the ionogel into the paper easily. As a proof of concept the fluid flow and mixing behaviour of two different ionogels µPADs were compared with the non-treated µPADs.It was demonstrated that both ionogels highly affect the fluid flow by delaying the flow due to their different physical and chemical properties and water holding capacities.

Calibrating Analytical Models for Semilocal Strings

In this work we calibrate two different analytic models of semilocal strings by constraining the values of their free parameters. In order to do so, we use data obtained from the largest and most accurate field theory simulations of semilocal strings to date, and compare several key properties with the predictions of the models. As this is still work in progress, we present some preliminary results together with descriptions of the methodology we are using in the characterisation of semilocal string networks.