Goncalves V.P.,Federal University of Pelotas |
Moreira B.D.,University of Sao Paulo |
Navarra F.S.,University of Sao Paulo
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015
The exclusive ϒ photoproduction in proton-proton and proton-nucleus collisions at LHC energies is investigated using the color dipole formalism and considering different models for the ϒ wave function and forward dipole-target scattering amplitude. Our goal is to update the color dipole predictions and estimate the theoretical uncertainty present in these predictions. We present predictions for the kinematical ranges probed by the ALICE, CMS and LHCb Collaborations. © 2015 The Authors.
Goncalves V.P.,Federal University of Pelotas |
MacHado M.V.T.,Federal University of Rio Grande do Sul
Physical Review C - Nuclear Physics | Year: 2011
In this Rapid Communication we update our predictions for the photoproduction of vector mesons in coherent pp and AA collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies using the color dipole approach and the Color Glass Condensate formalism. In particular, we present our predictions for the first run of the LHC at half energy and for the rapidity dependence of the ratio between the J/Ψ and ρ cross sections at RHIC energies. © 2011 American Physical Society.
Victora C.G.,Federal University of Pelotas
Food and nutrition bulletin | Year: 2012
Maternal nutrition interventions are efficacious in improving birth outcomes. It is important to demonstrate that if delivered in field conditions they produce improvements in health and nutrition. Analyses of scaling-up of five program implemented in several countries. These include micronutrient supplementation, food fortification, food supplements, nutrition education and counseling, and conditional cash transfers (as a platform for delivering interventions). Evidence on impact and cost-effectiveness is assessed, especially on achieving high, equitable, and sustained coverage, and reasons for success or failure Systematic review of articles on large-scale programs in several databases. Two separate reviewers carried out independent searches. A separate review of the gray literature was carried out including websites of the most important organizations leading with these programs. With Google Scholar a detailed review of the 100 most frequently cited references on each of the five above topics was conducted. Food fortification programs: iron and folic acid fortification were less successful than salt iodization initiatives, as the latter attracted more advocacy. Micronutrient supplementation programs: Nicaragua and Nepal achieved good coverage. Key elements of success are antenatal care coverage, ensuring availability of tablets, and improving compliance. Integrated nutrition programs in India, Bangladesh, and Madagascar with food supplementation and/or behavioral change interventions report improved coverage and behaviors, but achievements are below targets. The Mexican conditional cash transfer program provides a good example of use of this platform to deliver maternal nutritional interventions. Programs differ in complexity, and key elements for success vary with the type of program and the context in which they operate. Special attention must be given to equity, as even with improved overall coverage and impact inequalities may even be increased. Finally, much greater investments are needed in independent monitoring and evaluation.
Reiser R.H.S.,Federal University of Pelotas |
Bedregal B.,Federal University of Rio Grande do Norte
Information Sciences | Year: 2013
Firstly, this work studies the class of representable (co)implications obtained by idempotent aggregations and pair of dual interval functions, namely fuzzy implications and coimplications. Following the same construction, as the main contribution in the context of the interval-valued intuitionistic fuzzy logic, which is conceived by Atanassov, the class of representable Atanassov's intuitionistic fuzzy implications is obtained by composition of idempotent interval aggregations and dual pairs of representable fuzzy implications and coimplications. Additionally, the conditions under which relevant properties of fuzzy implications and Atanassov's intuitionistic fuzzy implications are preserved by such constructions are investigated. Furthermore, taking into account the projection functions and related (interval-valued) Atanassov's intuitionistic fuzzy implications, it also shows that representable (interval-valued) Atanassov's intuitionistic fuzzy implications preserve (degenerate) diagonal elements. © 2013 Elsevier Inc. All rights reserved.
Barros A.J.D.,Federal University of Pelotas |
Victora C.G.,Federal University of Pelotas
PLoS Medicine | Year: 2013
To monitor progress towards the Millennium Development Goals, it is essential to monitor the coverage of health interventions in subgroups of the population, because national averages can hide important inequalities. In this review, we provide a practical guide to measuring and interpreting inequalities based on surveys carried out in low- and middle-income countries, with a focus on the health of mothers and children. Relevant stratification variables include urban/rural residence, geographic region, and educational level, but breakdowns by wealth status are increasingly popular. For the latter, a classification based on an asset index is the most appropriate for national surveys. The measurement of intervention coverage can be made by single indicators, but the use of combined measures has important advantages, and we advocate two summary measures (the composite coverage index and the co-coverage indicator) for the study of time trends and for cross-country comparisons. We highlight the need for inequality measures that take the whole socioeconomic distribution into account, such as the relative concentration index and the slope index of inequality, although simpler measures such as the ratio and difference between the richest and poorest groups may also be presented for non-technical audiences. Finally, we present a framework for the analysis of time trends in inequalities, arguing that it is essential to study both absolute and relative indicators, and we provide guidance to the joint interpretation of these results. © 2013 Barros, Victora.
Borges M.C.,Federal University of Pelotas
Circulation Research | Year: 2016
RATIONALE:: Hypoadiponectinemia correlates with several coronary heart disease (CHD) risk factors. However, it is unknown whether adiponectin is causally implicated in CHD etiology. OBJECTIVE:: We aimed to investigate the causal effect of adiponectin on CHD risk. METHODS AND RESULTS:: We undertook a Mendelian randomization study using data from genome-wide association studies (GWAS) consortia. We used the ADIPOGen consortium to identify genetic variants that could be used as instrumental variables for the effect of adiponectin. Data on the association of these genetic variants with CHD risk were obtained from CARDIoGRAM (22,233 CHD cases and 64,762 controls of European ancestry) and from CARDIoGRAMplusC4D Metabochip (63,746 cases and 130,681 controls; ~ 91% of European ancestry) consortia. Data on the association of genetic variants with adiponectin levels and with CHD were combined to estimate the influence of blood adiponectin on CHD risk.In the conservative approach (restricted to using variants within the adiponectin gene as instrumental variables), each 1 unit increase in log blood adiponectin concentration was associated with an odds ratio for CHD of 0.83 (95%CI: 0.68; 1.01) in CARDIoGRAM and 0.97 (95%CI: 0.84, 1.12) in CARDIoGRAMplusC4D Metabochip. Findings from the liberal approach (including variants in any locus across the genome) indicated a protective effect of adiponectin that was attenuated to the null following adjustment for known CHD predictors CONCLUSIONS:: Overall, our findings do not support a causal role of adiponectin levels in CHD etiology.Circulation Research is published on behalf of the American Heart Association, Inc., by Wolters Kluwer. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial-NoDervis License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited, the use is noncommercial, and no modifications or adaptations are made. © 2016 American Heart Association, Inc.
Santos I.S.,Federal University of Pelotas |
Santos I.S.,Catholic University of Pelotas
International journal of epidemiology | Year: 2014
This is an update of the 2004 Pelotas Birth Cohort profile, originally published in 2011. In view of the high prevalence of overweight and mental health problems among Brazilian children, together with the availability of state-of-the-art equipment to assess body composition and diagnostic tests for mental health in childhood, the main outcomes measured in the fifth follow-up (mean age 6.8 years) included child body composition, mental health and cognitive ability. A total of 3722 (90.2%) of the original mothers/carers were interviewed and their children examined in a clinic where they underwent whole-body dual X-ray absorptiometry (DXA), air displacement plethysmography and a 3D photonic scan. Saliva samples for DNA were obtained. Clinical psychologists applied the Development and Well-Being Assessment questionnaire and the Wechsler Intelligence Scale for Children to all children. Results are being compared with those of the two earlier cohorts to assess the health effects of economic growth and full implementation of public policies aimed at reducing social inequalities in the past 30 years. For further information visit the programme website at [http://www.epidemio-ufpel.org.br/site/content/coorte_2004/questionarios.php]. Applications to use the data should be made by contacting 2004 cohort researchers and filling in the application form available at [http://www.epidemio-ufpel.org.br/site/content/estudos/formularios.php]. © The Author 2014; all rights reserved. Published by Oxford University Press on behalf of the International Epidemiological Association.
Hallal P.C.,Federal University of Pelotas
Journal of sports sciences | Year: 2012
The aim of this study was to investigate the cross-sectional and prospective associations between physical activity and body composition in adolescence. This is a prospective study, including 4,103 adolescents belonging to the Pelotas (Brazil) 1993 birth cohort, who were followed up at the mean ages of 11.3 and 14.7 years. Subsample analyses included 511 individuals with accelerometry and deuterium dilution data at 13.3 years. Sum of skinfolds at age 11.3 years was highly correlated with skinfolds at age 14.7 years (rho = 0.74, P < 0.001). More than 85% of participants remained in the same quintile or changed by not more than one quintile during the 3.4 year period. Tracking of physical activity was considerably lower, although still significant; the correlation was 0.24 (P < 0.001) and 61.4% of the adolescents moved one or less quintiles. In fully-adjusted models, no significant cross-sectional or longitudinal associations were found between physical activity and body composition, neither in boys nor in girls. These null results were confirmed in the 511 individuals with accelerometry and deuterium data. We provide evidence of tracking of physical activity and particularly body composition during adolescence. Our results do not support the hypothesis that physical activity and fatness are strongly related in adolescents.
Goncalves V.P.,Federal University of Pelotas
Nuclear Physics A | Year: 2013
One of the open questions of the strong interaction theory is the existence of the Odderon, which is an unambiguous prediction of Quantum Chromodynamics, but still not confirmed in the experiment. In this paper we propose the study of the diffractive ηc photoproduction in coherent interactions as a new alternative to probe the Odderon in pp and PbPb collisions at CERN LHC. As the Pomeron exchange cannot contribute to this process, its observation would indicate the existence of the Odderon. We predict total cross sections of order of p b(μb) for pp (PbPb) collisions and large values for the event rates/year, which makes, in principle, the experimental analysis of this process feasible at LHC. © 2013 Elsevier B.V.
Bryce J.,Institute for International Programs |
Victora C.G.,Federal University of Pelotas |
Black R.E.,Institute for International Programs
The Lancet | Year: 2013
10 years ago, The Lancet published a Series about child survival. In this Review, we examine progress in the past decade in child survival, with a focus on epidemiology, interventions and intervention coverage, strategies of health programmes, equity, evidence, accountability, and global leadership. Knowledge of child health epidemiology has greatly increased, and although more and better interventions are available, they still do not reach large numbers of mothers and children. Child survival should remain at the heart of global goals in the post-2015 era. Many countries are now making good progress and need the time and support required to finish the task. The global health community should show its steadfast commitment to child survival by amassing knowledge and experience as a basis for ever more effective programmes. Leadership and accountability for child survival should be strengthened and shared among the UN system; governments in high-income, middle-income, and low-income countries; and non-governmental organisations. © 2013 Elsevier Ltd.