Stability of fluid flow in a Brinkman porous medium-A numerical study

The stability of fluid flow in a horizontal layer of Brinkman porous medium with fluid viscosity different from effective viscosity is investigated. A modified Orr-Sommerfeld equation is derived and solved numerically using the Chebyshev collocation method. The critical Reynolds number Re-c, the critical wave number alpha(c) and the critical wave speed c(c) are computed for various values of porous parameter and ratio of viscosities. Based on these parameters, the stability characteristics of the system are discussed in detail. Streamlines are presented for selected values of parameters at their critical state

intervenções de enfermagem para a gestão da dor em contexto pediátrico

Este relatório pretende apresentar a análise das atividades realizadas nos diferentes campos de estágio bem como as competências desenvolvidas na área de especialização de enfermagem de saúde infantil e pediatria, e especificamente no âmbito da gestão da dor. O estágio decorreu em diferentes unidades de prestação de cuidados da área pediátrica nomeadamente Neonatologia, Internamento, Centro de Saúde e Urgência. Teve por base os seguintes objetivos gerais: desenvolver competências específicas de Enfermeiro Especialista em Enfermagem da Saúde da Criança e do Jovem, visando a intervenção de enfermagem de especial complexidade à criança / jovem e família, para a promoção da adaptação, do desenvolvimento e do equilíbrio deste sistema, sujeito a stressores; e ainda desenvolver e aprofundar competências na gestão diferenciada da dor da criança/jovem. Adotou-se uma metodologia reflexiva, reflexão sistemática sobre a prática, evidenciando a capacidade autocrítica do exercício profissional com recurso à evidência científica e à experiência. O enquadramento concetual transparece a justificação do tema e a construção do saber fundamentado no quadro de referência dos Cuidados de Enfermagem Pediátrica, com recurso à visão de Betty Neuman. O modelo concetual destaca a permanente interação da pessoa com o ambiente, onde é afetado por diferentes stressores que lhe podem causar desequilíbrio. A dor enquanto fenómeno sensível à intervenção de enfermagem pode, à luz do modelo, ser prevenida com sustentação na possível reação, recursos, objetivos e no resultado previsto. O desenvolvimento e a aquisição de competências do domínio da assistência da criança/jovem na maximização da saúde; no cuidado nas situações de especial complexidade, e na prestação de cuidados específicos em resposta às necessidades do ciclo de vida e de desenvolvimento, permitiram-me enriquecer as intervenções de enfermagem enquanto elemento facilitador na gestão da dor, e ainda contribuir para a valorização da profissão através de práticas que promovam ganhos em saúde.This report aims to present the analysis of the activities performed in the various internship fields as well as the skills developed in the area of child health nursing expertise and pediatrics, and specifically in the pain management. The stage took place in different units of care pediatric area including neonatology, Inpatient, Emergency and Health Center. Was based on the following general objectives: develop specific competencies Nurse Specialist Health Nursing in Child and Youth aimed at nursing intervention of special complexity to the child / youth and family to promote adaptation, development and balance this system, subject to stressors; and to develop and deepen skills in differentiated management of pain the child / youth. It adopted a reflexive methodology - systematic reflection on practice, showing the self-criticism capacity of professional practice using scientific evidence and experience. The conceptual framework reveals the theme of justification and the construction of knowledge based on the framework of Pediatric Nursing Care, using the Betty Neuman vision. The conceptual model highlights the ongoing interaction of the person with the environment, which is affected by different stressors that it can cause imbalance. Pain as a phenomenon sensitive to nursing intervention can, in the light of the model, be prevented with support in the possible reaction, resources, objectives and expected outcome. The development and acquisition of domain skills of child care / youth in maximizing health; in care in situations of particular complexity, and provide specific care for the needs of life and development cycle, allowed me to enrich nursing interventions as facilitator in pain management, and contribute to the enhancement of the profession through practices that promote health gains

Measurement of the nuclear modification factor for muons from charm and bottom hadrons in Pb+Pb collisions at 5.02 TeV with the ATLAS detector

Heavy-flavour hadron production provides information about the transport properties and microscopic structure of the quark-gluon plasma created in ultra-relativistic heavy-ion collisions. A measurement of the muons from semileptonic decays of charm and bottom hadrons produced in Pb+Pb and pp collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV with the ATLAS detector at the Large Hadron Collider is presented. The Pb+Pb data were collected in 2015 and 2018 with sampled integrated luminosities of 208 mu b(-1) and 38 mu b(-1), respectively, and pp data with a sampled integrated luminosity of 1.17 pb(-1) were collected in 2017. Muons from heavy-flavour semileptonic decays are separated from the light-flavour hadronic background using the momentum imbalance between the inner detector and muon spectrometer measurements, and muons originating from charm and bottom decays are further separated via the muon track's transverse impact parameter. Differential yields in Pb+Pb collisions and differential cross sections in pp collisions for such muons are measured as a function of muon transverse momentum from 4 GeV to 30 GeV in the absolute pseudorapidity interval vertical bar eta vertical bar < 2. Nuclear modification factors for charm and bottom muons are presented as a function of muon transverse momentum in intervals of Pb+Pb collision centrality. The bottom muon results are the most precise measurement of b quark nuclear modification at low transverse momentum where reconstruction of B hadrons is challenging. The measured nuclear modification factors quantify a significant suppression of the yields of muons from decays of charm and bottom hadrons, with stronger effects for muons from charm hadron decays

A search for an unexpected asymmetry in the production of e+μ− and e−μ+ pairs in proton-proton collisions recorded by the ATLAS detector at root s = 13 TeV

This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e(+)mu(-) and e(-)mu(+) pairs to constrain physics processes beyond the Standard Model. It uses 139 fb(-1) of proton-proton collision data recorded at root s = 13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e(+)mu(-) and e(-)mu(+), the search contains two broad signal regions which are used to provide model-independent constraints on the ratio of cross sections at the 2% level. The search also has two special selections targeting supersymmetric models and leptoquark signatures. Observations using one of these selections are able to exclude, at 95% confidence level, singly produced smuons with masses up to 640 GeV in a model in which the only other light sparticle is a neutralino when the R-parity-violating coupling lambda(23)(1)' is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when g(1R)(eu) = g(1R)(mu c) = 1, at 95% confidence level. The limit on the coupling reduces to g(1R)(eu) = g(1R)(mu c) = 0.46 for a mass of 1420 GeV