Topological Gravity on (D,N)−(D,N)-Shift Superspace Formulation

In this contribution, we re-assess the subject of topological gravity by following the Shift Supersymmetry formalism. The gauge-fixing of the theory goes under the Batallin-Vilkovisky (BV) prescription based on a diagram that contains both ghost and anti-ghost superfields, associated to the super-vielbein and the super-Lorentz connection. We extend the formulation of the topological gravity action to an arbitrary number of dimensions of the shift superspace by adopting a formulation based on the gauge-fixing for BF-type models

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This work discusses the ongoing development of a toolset named MARS aimed to ease the process of safely deploying runtime verification monitors into distributed micro-ROS and ROS2 nodes. The work is motivated by a use case in the health and automotive domains and covers safety/security concerns around the manipulation of sensitive biometric data.This work was partially supported by National Funds through FCT/MCTES (Portuguese Foundation for Science and Technology), within the CISTER Research Unit (UIDP/UIDB/04234/2020); also by FCT within project ECSEL/0016/2019 and from the ECSEL Joint Undertaking (JU) under grant agreement No 876852. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and Austria, Czech Republic, Germany, Ireland, Italy, Portugal, Spain, Sweden, Turkey. We would also like to thank Antonio Rodriguez and Pablo Garrido from eProsima for their collaboration in development of the secure custom transport layer of MARS. Disclaimer: This document reflects only the author’s view and the Commission is not responsible for any use that may be made of the information it contains)info:eu-repo/semantics/publishedVersio

Robust quantum boomerang effect in non-Hermitian systems

Anderson localization is a general phenomenon that applies to a variety of disordered physical systems. Recently, a novel manifestation of Anderson localization for wave packets launched with a finite average velocity was proposed, the Quantum boomerang effect (QBE). This phenomenon predicts that the disorder-averaged center of mass of a particle initially moves ballistically, then makes a U-turn, and finally slowly returns to its initial position. The QBE has been predicted to take place in several Hermitian models with Anderson localization and has been experimentally observed in the paradigmatic quantum kicked rotor model. In this work, we investigate the emergence of the QBE in non-Hermitian systems and clarify the importance of symmetries of the Hamiltonian and the initial state. We generalize the analytical arguments available in the literature and show that even in the case of complex spectrum a boomerang-like behavior can appear in a non-Hermitian system. We confirm our analytical results through a careful numerical investigation of the dynamics for several non-Hermitian models. We find that non-Hermiticity leads to the breakdown of the dynamical relation, though the QBE is preserved. This work opens up new avenues for future investigations in Anderson localized systems. The models studied here may be implemented using cold atoms in optical lattices.Comment: 14 pages, 10 figure

Factores determinantes da diferenciação territorial na capacidade de iniciativa empresarial: o caso português 1983/89

Mestrado em EconomiaN/

Towards a natural classification : the taxonomy and evolution of Xanthorrhoea

The ability to increase the filler content of paper without significantly sacrificing its mechanical strength is of high interest for papermakers. In this work, three samples of ground calcium carbonate (GCC), differing in size and in brightness, modified with silica via the sol-gel method, were used as fillers in papermaking. Handsheets were produced using a eucalyptus kraft pulp furnish and with a filler amount near 20%. It was found that not only were the strength properties of the handsheets produced with the modified GCCs always significantly better than those obtained with the unmodified GCCs (e.g., the tensile index exhibited improvements of 16 to 20%), but bulk also was increased (by 7 to 13%). Some decreases in the light scattering and opacity values were noted when using the modified GCC, but the brightness was roughly the same. The enhanced fiber-to-filler bonding may be attributed to the hydrogen bonding between the cellulosic fibers and the hydroxyl groups of the silica coating the calcium carbonate particles

Canonical Analysis of the Jackiw-Teitelboim Model in the Temporal Gauge. I. The Classical Theory

As a preparation for its quantization in the loop formalism, the 2-dimensional gravitation model of Jackiw and Teitelboim is analysed in the classical canonical formalism. The dynamics is of pure constraints as it is well-known. A partial gauge fixing of the temporal type being performed, the resulting second class constraints are sorted out and the corresponding Dirac bracket algebra is worked out. Dirac observables of this classical theory are then calculated.Comment: 15 pages, Latex. Misprint correction

Transplante autólogo de células estaminais em leucemiamielóide aguda: factores com Influência na sobrevida: experiência de 13 anos de uma Instituição

© Ordem dos MédicosWe report our results of autologous stem cell transplantation (SCT) in patients with AML during the last 13 years. Between August 1990 and December 2003, 42 patients with acute myeloid leukemia (AML) received an autologous SCT. Patients were classified as standard risk if first complete remission (CR) was induced after one or two chemotherapy regimens and the white blood cell count at presentation was below 50,000/mL (n=12), while patients requiring more than two induction regimens to attain first CR and with CR2 ou more advanced disease and/or had a higher white blood cell count at presentation were defined as high risk (n=30). Twenty one patients were transplanted in first CR. The median patient age was 24 years (range, 2-56 years), and the median time interval from diagnosis to autologous SCT was 9 months (range 3-87 months). The conditioning regimen for SCT consisted of busulfan (BU) 16 mg/kg and melfalan (MEL) 180 mg/m2 (BUMEL) in 17 (40%) patients and busulfan 16 mg/kg and VP-16 60 mg/kg (BUVP16) in 22 (52%) patients. Three patients received a different conditioning regimen with BCNU 300 mg/m2, VP16 2 g/m2 and melphalan 160 mg/m2 (BEM). Twenty five (60%) patients received bone marrow (BM), 11 (26%) patients received peripheral blood stem cells (PBSC) and 6 patients (14%) received BM plus PBSC. With a median follow-up of 7 years, the 13 year overall survival (OS) and diseasefree survival (DFS) of all patients is 52% and 40%, respectively. In univariate analysis, males had a significantly superior DFS than females (55% vs 22%, p=0.003), and patients younger than 15 years of age had significantly superior OS and DFS than older patients (50% vs 35%, p=0.05; and 50% vs 28%, p=0.03, respectively). Patients with FAB M3 subtype also had a superior OS than the other FAB subtypes (100% vs 44%, p=0.05). There was a strong statistical correlation between risk group and survival. In fact, the patients with standard risk had a superior OS and DFS than those with high risk disease (67% vs 23%, p=0.0004; and 50% vs 27%, p=0.01, respectively). When patients with FAB M3 disease were excluded from the analysis, the group with standard risk continue to have a superior OS and DFS (67% vs 13%, p=0.008; and 50% vs 14%, p=0.02, respectively). We conclude that autologous SCT is an effective treatment in AML with the possibility of long survivorship, particularly in patients with standard risk disease.info:eu-repo/semantics/publishedVersio

Evaluation of the bond performance in FRP-brick components re-bonded after initial delamination

The bond behavior between Fiber Reinforced Polymers (FRPs) and masonry substrates has been the subject of many studies during the last years. Recent accelerated aging tests have shown that bond degradation and FRP delamination are likely to occur in FRP-strengthened masonry components under hygrothermal conditions. While an investigation on the possible methods to improve the durability of these systems is necessary, the applicability of different bond repair methods should also be studied. This paper aims at investigating the debonding mechanisms after repairing delaminated FRP-strengthened masonry components. FRP-strengthened brick specimens, after being delaminated, are repaired with two different adhesives: a conventional epoxy resin and a highly flexible polymer. The latter is used as an innovative adhesive in structural applications. The bond behavior in the repaired specimens is investigated by performing single-lap shear bond tests. Digital image correlation (DIC) is used for deeper investigation of the surface deformation and strains development. The effectiveness of the repair methods is discussed and compared with the strengthened specimens.The first author acknowledges the financial support of the Portuguese Science Foundation (Fundacao de Ciencia e Tecnologia, FCT), through grant SFRH/BPD/92614/2013. Additional acknowledgement goes to Sika Poland for providing the PS polymer to the laboratory of the Minho University in Portugal

Análise experimental de pilares de betão armado reforçados com laminados de carbono sob acções cíclicas

Na última década convencionais sistemas de reforço de pilares têm vindo a ser substituídos por sistemas constituídos por materais compósitos de fibras de carbono e de vidro, devido à resistência elevada, leveza, durabilidade, resistência à corrosão e facilidade de aplicação destes últimos sistemas. Recentemente foi proposto um sistema constituído por laminados de fibras de carbono com secção transversal de 10×1.5mm2 embutidos no betão de recobrimento das faces do elemento do pilar ortogonais ao plano de actuação das cargas. Por intermédio de ensaios experimentais constatou-se que este sistema de reforço permite aumentar significativamente a capacidade de carga de pilares com modos de rotura por flexão. Aliando a este facto a rapidez de execução e a economia de material, conclui-se ser uma alternativa eficaz às convencionais técnicas de reforço para pilares com modos de rotura por flexão. Neste trabalho apresentam-se e analisam-se os resultados obtidos numa campanha de ensaios experimentais em pilares de betão armado reforçados com o sistema de reforço referido e submetidos a acções cíclicas, dando-se especial relevo aos parâmetros que permitem avaliar a capacidade dissipativa de energia dos elementos ensaiados. Ensaios preliminares de arranque com o sistema de reforço proposto foram efectuados, sendo os resultados obtidos analisados