Cultural Cooperation Networks Creative Laboratory: balanço do ano experimental

“Redes de Cooperação Cultural Transnacionais: Portugal europeu, lusófono e ibero-americano” é um projeto de investigação de pós-doutoramento que está a ser desenvolvido em Portugal, Espanha e Brasil, com o objetivo de fomentar a prática qualificada de trabalho em rede de profissionais e de organizações do setor cultural português. Cultural Cooperation Networks – Creative Laboratory (2CN-CLab) é um laboratório criativo descentralizado que foi criado no final de 2015 no âmbito do projeto com o intuito de promover a discussão crítica e construtiva sobre as redes de cooperação cultural. O 2CN-CLab desenrolou-se, de forma experimental, no ano de 2016, em Portugal e Espanha. No presente artigo vai apresentar-se sinteticamente a avaliação que foi efetuada ao 2CN-CLab 2016 com base na análise dos resultados de um inquérito por questionário que foi aplicado no final de treze das quinze ações realizadas, avaliação essa que concorreu para que fossem implementadas alterações ao 2CN-CLab 2017.“Transnational Cultural Cooperation Networks: European Portuguese, Lusophone and Ibero- American” is a postdoctoral research project being developed in Portugal, Spain and Brazil, aiming to foster the qualified practice of networking professionals And organizations from the Portuguese cultural sector. Creative Cooperation (2CN-CLab) is a decentralized creative laboratory that was created in late 2015 within the framework of the project to promote a critical and constructive discussion on cultural cooperation networks. The 2CN-CLab was developed experimentally in 2016 in Portugal and Spain. In the present article, the evaluation that was made to the 2CN-CLab 2016 will be presented, based on the analysis of the results of a questionnaire survey that was applied at the end of thirteen of the fifteen actions carried out, which contributed to the implementation of changes To 2CN-CLab 2017.info:eu-repo/semantics/publishedVersio

Random-bit optimal uniform sampling for rooted planar trees with given sequence of degrees and Applications

In this paper, we redesign and simplify an algorithm due to Remy et al. for the generation of rooted planar trees that satisfies a given partition of degrees. This new version is now optimal in terms of random bit complexity, up to a multiplicative constant. We then apply a natural process "simulate-guess-and-proof" to analyze the height of a random Motzkin in function of its frequency of unary nodes. When the number of unary nodes dominates, we prove some unconventional height phenomenon (i.e. outside the universal square root behaviour.)Comment: 19 page

Doping of Graphene Nanoribbons via Functional Group Edge Modification

We report on the on-surface synthesis of 7 armchair graphene nanoribbons (7-AGNRs) substituted with nitrile (CN) functional groups. The CN groups are attached to the GNR backbone by modifying the 7-AGNR precursor. While many of these groups survive the on-surface synthesis, the reaction process causes the cleavage of some CN from the ribbon backbone and the on-surface cycloisomerization of few nitriles onto pyridine rings. Scanning Tunneling Spectroscopy and Density Functional Theory reveal that CN groups behave as very efficient n-dopants, significantly downshifting the bands of the ribbon, and introducing deep impurity levels associated to the nitrogen electron lone pairs

Higher Spin Currents in the Holographic N=1 Coset Minimal Model

In the N=1 supersymmetric coset minimal model based on (B_N^{(1)} \oplus D_N^{(1)}, D_N^{(1)}) at level (k,1) studied recently, the standard N=1 super stress tensor of spins (3/2,2) is reviewed. By considering the stress tensor in the coset (B_N^{(1)}, D_N^{(1)}) at level k, the higher spin-2' Casimir current was obtained previously. By acting the above spin-3/2 current on the higher spin-2' Casimir current, its superpartner, the higher spin-5/2 current, can be generated and combined as the first higher spin supercurrent with spins (2', 5/2). By calculating the operator product expansions (OPE) between the higher spin supercurrent and itself, the next higher spin supercurrent can be generated with spins (7/2,4). Moreover, the other higher spin supercurrent with spins (4',9/2) can be generated by calculating the OPE between the first higher spin supercurrent with spins (2', 5/2) and the second higher spin supercurrent with spins (7/2,4). Finally, the higher spin supercurrent, (11/2,6), can be extracted from the right hand side of OPE between the higher spin supercurrents, (2', 5/2) and (4', 9/2).Comment: 97 pages; footnotes 1, 7 and 9 and the last paragraph of Appendix F added and to appear in JHE

Constrained probability distributions of correlation functions

Context: Two-point correlation functions are used throughout cosmology as a measure for the statistics of random fields. When used in Bayesian parameter estimation, their likelihood function is usually replaced by a Gaussian approximation. However, this has been shown to be insufficient. Aims: For the case of Gaussian random fields, we search for an exact probability distribution of correlation functions, which could improve the accuracy of future data analyses. Methods: We use a fully analytic approach, first expanding the random field in its Fourier modes, and then calculating the characteristic function. Finally, we derive the probability distribution function using integration by residues. We use a numerical implementation of the full analytic formula to discuss the behaviour of this function. Results: We derive the univariate and bivariate probability distribution function of the correlation functions of a Gaussian random field, and outline how higher joint distributions could be calculated. We give the results in the form of mode expansions, but in one special case we also find a closed-form expression. We calculate the moments of the distribution and, in the univariate case, we discuss the Edgeworth expansion approximation. We also comment on the difficulties in a fast and exact numerical implementation of our results, and on possible future applications.Comment: 13 pages, 5 figures, updated to match version published in A&A (slightly expanded Sects. 5.3 and 6

Ab initio study of sodium cointercalation with diglyme molecule into graphite

The cointercalation of sodium with the solvent organic molecule into graphite can resolve difficulty of forming the stage-I Na-graphite intercalation compound, which is a predominant anode of Na-ion battery. To clarify the mechanism of such cointercalation, we investigate the atomistic structure, energetics, electrochemical properties, ion and electron conductance, and charge transferring upon de/intercalation of the solvated Na-diglyme ion into graphite with {\it ab initio} calculations. It is found that the Na(digl)$_2$C$_n$ compound has the negatively lowest intercalation energy at $n\approx$21, the solvated Na(digl)$_2$ ion diffuses fast in the interlayer space, and their electronic conductance can be enhanced compared to graphite. The calculations reveal that the diglyme molecules as well as Na atom donates electrons to the graphene layer, resulting in the formation of ionic bonding between the graphene layer and the moiety of diglyme molecule. This work will contribute to the development of innovative anode materials for alkali-ion battery applications