Diffusion Enhancement in Core-softened fluid confined in nanotubes

We study the effect of confinement in the dynamical behavior of a core-softened fluid. The fluid is modeled as a two length scales potential. This potential in the bulk reproduces the anomalous behavior observed in the density and in the diffusion of liquid water. A series of $NpT$ Molecular Dynamics simulations for this two length scales fluid confined in a nanotube were performed. We obtain that the diffusion coefficient increases with the increase of the nanotube radius for wide channels as expected for normal fluids. However, for narrow channels, the confinement shows an enhancement in the diffusion coefficient when the nanotube radius decreases. This behavior, observed for water, is explained in the framework of the two length scales potential.Comment: 17 pages, 8 figures, accept for publication at J. Chem. Phy

Avaliação da vacina Circovac(r) no controle da síndrome da circovirose suína (SCS) em condições de campo no Brasil.

bitstream/item/58046/1/CUsersPiazzonDocuments473.pdfProjeto/Plano de Ação: 03.07.51.900-07

International Law of Regional Organizations: A Comparative Perspective

This article provides a comparative analysis of the law and practice of regional international organizations (rio s). Drawing upon the International Law Association (ila) study and individual regional reports, the article offers a cross-regional account of organizations located in Europe, Eurasia, the Middle East, Africa, Latin America and the Caribbean, and the Asia-Pacific. The article focuses on the main conceptual questions that emerged during the study and reflects on some of the main insights gleaned from the cross-cutting comparisons. The article discusses the concept of ‘regional international organization’ and the debates about the appropriate definition to be used in the Study. The article discusses how international law applies to, and within, regional international organizations, examining issues such as the autonomy of the organization’s internal law. The article shows how regional international organizations have influenced the development of international law, by concluding treaties, contributing or catalysing relevant practice to the formation of customary international law, and producing authoritative ‘subsidiary means’ to identify the law. The comparative assessment allows us to offer reflections on the ‘openness’ of regional international organizations and the conditions under which they can shape, and be shaped by, international law. The article concludes with some starting points for further research on the place of regional international organizations

Dark energy loopholes some time after GW170817

We revisit the constraints on scalar tensor theories of modified gravity following the purge of GW170817. We pay particular attention to dynamical loopholes where the anomalous speed of propagation of the gravitational wave can vanish on-shell, when we impose the dynamical field equations. By working in the effective field theory formalism we are able to improve on previous analyses, scanning a much wider class of theories, including Beyond Horndeski and DHOST. Furthermore, the formalism is well adapted to consider the effect of inhomogeneous perturbations, where we explicitly take into account the fact that the galactic overdensities are pressureless to leading order

PVCbase: an integrated web resource for the PVC bacterial proteomes

Interest in the Planctomycetes-Verrucomicrobia-Chlamydiae (PVC) bacterial superphylum is growing within the microbiology community. These organisms do not have a specialized web resource that gathers in silico predictions in an integrated fashion. Hence, we are providing the PVC community with PVCbase, a specialized web resource that gathers in silico predictions in an integrated fashion. PVCbase integrates protein function annotations obtained through sequence analysis and tertiary structure prediction for 39 representative PVC proteomes (PVCdb), a protein feature visualizer (Foundation) and a custom BLAST webserver (PVCBlast) that allows to retrieve the annotation of a hit directly from the DataTables. We display results from various predictors, encompassing most functional aspects, allowing users to have a more comprehensive overview of protein identities. Additionally, we illustrate how the application of PVCdb can be used to address biological questions from raw data

Do adolescents exposed to peer aggression at school consider themselves to be victims of bullying? The influence of sex and age

Introduction Exposure to peer aggression (PA) and bullying victimization (BV) are both expressions of peer victimization. Objectives In four age-sex groups, (1) Can exposure to PA and BV be considered distinct experiences? (2) To what extent do adolescents exposed to PA consider themselves bullying victims? and (3) What is the effect on BV of the number of PA events experienced? Methods This cross-sectional study evaluated a probabilistic community-based sample of 669 adolescents (11-15 years, 51.7% girls). A three-stage probabilistic sampling plan involved random selection of census units, eligible households, and one target child per household selected. A 15-item scale investigated exposure to PA events (physical aggression, verbal harassment, social manipulation) occurring more than once in the past six months. BV occurring more than once a week or most days in the past six months was investigated after presenting respondents with a BV definition that required them to feel harmed by their victimization experiences. Results Adolescents exposed to PA and/or BV reported PA only (76.2%), BV only (4.7%), and both (19.1%). Rates of BV among those exposed to PA were as follows: 11-to-12-year-old boys (22.7%), 13-to-15-year-old boys (9.7%), 11-to-12-year-old girls (46.5%), and 13-to-15-year-old girls (13.2%). Multiple logistic regression analysis (outcome = BV) found a significant interaction between PA, age, and sex. PA events had a significant effect on BV for all except older girls. Conclusion Exposure to PA and BV are different constructs; few older boys exposed to PA consider themselves bullying victims; and older girls are less affected by PA when it comes to BV

Maternal Awareness of Adolescent Bullying Victimization in a Low-Income Context

The published manuscript is available at EurekaSelect via https://doi.org/10.2174/2210676609666190808094820.Background: Adolescents and parents often disagree about the perception of bullying victimization since adults tend to underestimate its occurrence. Objective: This study identifies factors that can influence maternal perception of bullying victimization experienced by her son/daughter in the past 12 months. Methods: This cross-sectional study involved a representative sample of in-school adolescents (n=669, 11-15-years) living in Itaboraí city, Brazil (mean age±SE: 13.01±0.07 years; 51.7% females). A 3-stage probabilistic sampling procedure (random selection of census units, eligible households and target child) generated sampling weights. Trained lay interviewers individually applied semi-structured questionnaires to mothers and adolescents in the households. Multivariable logistic regression analysis examined factors potentially influencing maternal perception of bullying victimization experienced by her son/daughter: adolescent gender and age, adolescent self-perceived bullying victimization, exposure to severe physical punishment by parents, internalizing/externalizing behaviour problems identified by the Youth Self-Report/YSR, maternal education and maternal anxiety/depression identified by the 20-item Self-Reporting Questionnaire/SRQ-20. Results: Univariable logistic regression analysis identified a strong association between adolescent self-perceived bullying victimization and maternal perception of bullying victimization experienced by her son/daughter. Multivariable models showed that adolescent perception influenced maternal perception when adolescents had no clinical internalizing behaviour problems and when mothers had higher education. Conclusion: Anxious/depressive adolescents may hide victimization incidents, while those with no problems probably reveal these incidents to the mother. Considering that maternal low education is an indicator of low socioeconomic status, which is associated with multiple stressors, less educated mothers may be more likely to interpret these incidents as a common part of growing-up