Desnutrição e desenvolvimento neuropsicomotor

Nunes, Magda Lahorgue

doi:10.1590/s0021-75572001000300004

Cited by 6 publications

(7 citation statements)

References 2 publications

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“…where in the last step we neglect the contribution from radiation (since we are interested in low redshifts, z < 5, where it is indeed negligible), the evolution of the putative scalar field can be expressed in terms of the dark energy properties Ω φ and w as (Nunes & Lidsey 2004) 1…”

Section: Dynamical Dark Energy Modelsmentioning

confidence: 99%

Distinguishing freezing and thawing dark energy models through measurements of the fine-structure constant

Boas

Duarte

Martins

et al. 2020

A&A

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Mapping the behaviour of dark energy is a pressing task for observational cosmology. Phenomenological classification divides dynamical dark energy models into freezing and thawing, depending on whether the dark energy equation of state is approaching or moving away from w = p/ρ = −1. Moreover, in realistic dynamical dark energy models the dynamical degree of freedom is expected to couple to the electromagnetic sector, leading to variations of the fine-structure constant α. We discuss the feasibility of distinguishing between the freezing and thawing classes of models with current and forthcoming observational facilities and using a parametrisation of the dark energy equation of state, which can have either behaviour, introduced by Mukhanov as fiducial paradigm. We illustrate how freezing and thawing models lead to different redshift dependencies of α, and use a combination of current astrophysical observations and local experiments to constrain this class of models, improving the constraints on the key coupling parameter by more than a factor of two, despite considering a more extended parameter space than the one used in previous studies. We also briefly discuss the improvements expected from future facilities and comment on the practical limitations of this class of parametrisations. In particular, we show that sufficiently sensitive data can distinguish between freezing and thawing models, at least if one assumes that the relevant parameter space does not include phantom dark energy models.

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Section: Dynamical Dark Energy Modelsmentioning

confidence: 99%

Distinguishing freezing and thawing dark energy models through measurements of the fine-structure constant

Boas

Duarte

Martins

et al. 2020

A&A

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“…Do the fundamental constants vary? Answering this question has key implications for cosmology and fundamental physics, and in particular can shed light on the enigma of dark energy [9,10]. The current observational status is controversial, with claims for [11][12][13] and against * up090302017@alunos.fc.up.pt † Carlos.Martins@astro.up.pt ‡ Mario.Monteiro@astro.up.pt [14][15][16] variations of the fine-structure constant α and the proton-to-electron mass ratio µ at redshifts z ∼ 1 − 3.…”

Section: Introductionmentioning

confidence: 99%

Stellar test of the physics of unification

2012

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We discuss the feasibility of using solar-type main-sequence stars as probes of fundamental physics and unification. We use a simple polytropic stellar structure model and study its sensitivity to variations of the gravitational, strong and electroweak coupling constants in the context of unification scenarios. We quantify the sensitivity of the Sun's interior temperature to these variations, finding |∆α/α| 1.3 × 10 −4 for a 'canonical' choice of unification scenario, and discuss prospects for future improvements.

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“…Auditory skills are extremely important in the development of language and speech of individuals. The development of these skills depends on processes that involve complex nerve pathways that can be affected by environmental, social and pathological factors, as described in the literature (1,2,(4)(5)(6)8) In the national and international literature there are few studies (23)(24)(25) that relate to malnutrition and development of the auditory processing skills. However, studies have also found lower performance found in children with malnutrition.…”

Section: Discussionmentioning

confidence: 99%

“…The specific nutrient deficiencies may result in decreased ability to pay attention and affect problem-solving skills (3) . There is an association between the child's alimentary insufficiency and growth, development and behavioral or academic function (3,(5)(6)(7) . Depending on the duration and intensity of the nutritional deficiency, neural functions such as cognition, consciousness, emotion, learning, memory, motivation and anxiety can be affected (8,9) .…”

Section: Introductionmentioning

confidence: 99%

Habilidade auditiva em criança desnutrida

Caldas

Giacheti

Capellini

2014

Audiol., Commun. Res.

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Purpose: To characterize and compare the performance of malnourished children and normal children in auditory processing. Methods: The sample comprised 30 children from five to ten years old, both genders, being 15 malnourished children (G1) and 15 children with adequate nutritional status, as a control group (G2). The groups were paired according to gender, age and grade level. Both groups underwent peripheral and central auditory assessment, noting that malnourished children had higher changes in the skill of sequencing score for verbal and nonverbal when compared to normal children, and the same occurred in closing skills and background figure. Results: Regarding the degree of auditory processing disorder, it was more severe in malnourished children. Conclusion: Children with malnutrition have higher frequency alterations in auditory abilities when compared to normal children, being the temporal ordering skills, auditory memory, selective attention, figureground and closing the most affected skills.RESUMO Objetivo: Caracterizar e comparar o desempenho de crianças com desnutrição e crianças eutróficas nas habilidades do processamento auditivo. Métodos: A amostra foi composta por 30 crianças na faixa etária de 5 a 10 anos, de ambos os gêneros, sendo 15 crianças com desnutrição, que compuseram o grupo amostral (G1) e 15 crianças com estado nutricional adequado, como grupo controle (G2). Os grupos foram pareados segundo gênero, faixa etária e escolaridade. Ambos os grupos foram submetidos à avaliação auditiva periférica e central. Resultados: As crianças desnutridas apresentaram maior índice de alterações na habilidade de sequencialização sonora para sons verbais e não verbais, quando comparadas com as crianças eutróficas. O mesmo ocorreu nas habilidades de fechamento e figura fundo. Quanto ao grau do distúrbio do processamento auditivo, houve maior severidade nas crianças desnutridas. Conclusão: Crianças com desnutrição apresentaram maior frequência de alterações nas habilidades auditivas, quando comparadas a crianças eutróficas, sendo as habilidades de ordenação temporal, memória auditiva, atenção seletiva, figura fundo e fechamento, as habilidades mais afetadas.

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Desnutrição e desenvolvimento neuropsicomotor

Cited by 6 publications

References 2 publications

Distinguishing freezing and thawing dark energy models through measurements of the fine-structure constant

Distinguishing freezing and thawing dark energy models through measurements of the fine-structure constant

Stellar test of the physics of unification

Habilidade auditiva em criança desnutrida

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