Search results for " aging."
showing 10 items of 556 documents
The durability of basalt fibres reinforced polymer (BFRP) panels for cladding
2015
The study focuses on two basalt composite laminate panels for cladding, produced by means of vacuum bagging technique. In particular, unidirectional and random basalt fabrics, with different areal weights, using epoxy resin as matrix, were used. According to the ISO 15686 methodology for the evaluation of durability, samples were subjected to cycles of artificial aging in climatic chamber and outdoor exposure, carrying out mechanical (i.e. quasi-static and dynamic) and calorimetric tests. The results show the effectiveness over time of produced basalt composite laminates and the initial increase of the mechanical performances after the first steps of accelerated aging.
Age and Semantic Inhibition Measured by the Hayling Task: A Meta-Analysis.
2016
Objective Cognitive aging is commonly associated with a decrease in executive functioning (EF). A specific component of EF, semantic inhibition, is addressed in the present study, which presents a meta-analytic review of the literature that has evaluated the performance on the Hayling Sentence Completion test in young and older groups of individuals in order to assess the magnitude of the age effect. Method A systematic search involving Web of Science, PsyINFO, PsychARTICLE, and MedLine databases and Google Scholar was performed. A total of 11 studies were included in this meta-analysis, encompassing a total of 887 participants; 440 young and 447 older adults. The effect sizes for group dif…
A fractional-order model for aging materials: An application to concrete
2018
Abstract In this paper, the hereditariness of aging materials is modeled within the framework of fractional calculus of variable order. A relevant application is made for the long-term behavior of concrete, for which the creep function is evaluated with the aid of Model B3. The corresponding relaxation function is derived through the Volterra iterated kernels and a comparison with the numerically-obtained relaxation function of Model B3 is also reported. The proposed fractional hereditary aging model (FHAM) for concretes leads to a relaxation function that fully agrees with the well-established Model B3. Furthermore, the FHAM takes full advantage of the formalism of fractional-order calculu…
El paper de la interacció social en el procés de sortida del rol laboral. La jubilació primerenca com a exemple.
2010
El procés d'envelliment a Europa dóna lloc a canvis importants en la composició de la força laboral que plantegen nous desafiaments als diversos agents socials, les empreses, l'administració pública i els treballadors mateixos. Aquesta situació ha fet sorgir un interès cada cop major per entendre el procés que du les persones a jubilar-se abans de temps. La investigació en aquest àmbit ha partit de dues perspectives. Una perspectiva considera la jubilació primerenca com un fenomen involuntari i que és resultat de les polítiques socials i dels acords entre l'empresa, l'administració i els sindicats per fer front a problemes estructurals. L'altra perspectiva, tot i que considera també els efe…
Evidencias psicométricas de una medida breve de resiliencia en adultos mayores peruanos no institucionalizados
2018
Resumen: La resiliencia es comprendida como el dominio de recursos personales y factores contextuales que permiten un afrontamiento exitoso y el logro de una adaptación positiva ante los diferentes estresores que aparecen a lo largo de la vida, siendo así importante dentro del proceso de envejecimiento saludable y exitoso. En la actualidad se han desarrollado instrumentos breves para la medición de la resiliencia como la escala breve de resiliencia (BRCS - Brief Resilient Coping Scale) que evalúa la capacidad de los individuos para hacer frente al estrés de manera adaptativa. En este sentido, el estudio ofrece evidencia de validez y fiabilidad de la BRCS en adultos mayores no institucionali…
Benzo[a]pyrene represses DNA repair through altered E2F1/E2F4 function marking an early event in DNA damage-induced cellular senescence
2020
AbstractTranscriptional regulation of DNA repair is of outmost importance for the restoration of DNA integrity upon genotoxic stress. Here we report that the potent environmental carcinogen benzo[a]pyrene (B[a]P) activates a cellular DNA damage response resulting in transcriptional repression of mismatch repair (MMR) genes (MSH2, MSH6, EXO1) and of RAD51, the central homologous recombination repair (HR) component, ultimately leading to downregulation of MMR and HR. B[a]P-induced gene repression is caused by abrogated E2F1 signalling. This occurs through proteasomal degradation of E2F1 in G2-arrested cells and downregulation of E2F1 mRNA expression in G1-arrested cells. Repression of E2F1-me…
INDUCTION OF VEGF AND B-FGF RELEASE BY ELECTRO NEUROSTIMULATION (FREMS) IN DIABETIC POLYNEUROPATHY
2008
Is pain sensitivity altered in people with Alzheimer's disease? A systematic review and meta-analysis of experimental pain research
2016
Background Clinical studies suggest people with Alzheimer's disease (AD) have altered pain sensitivity. Experimental pain research is equivocal. Objective Conduct a meta-analysis to investigate if people with AD have altered pain sensitivity compared to healthy controls (HCs). Methods Three authors searched electronic databases from inception till November 2015 for experimental pain studies in AD vs. HCs. Outcome measures were pain threshold, tolerance, pain ratings, heart rate response to noxious stimuli and the Facial Action Coding System (FACS). Random effect meta-analysis calculating Hedges' g ± 95% confidence intervals (CI) was conducted. Results Thirteen studies were identified, inclu…
Nutrients associated with diseases related to aging: a new healthy aging diet index for elderly population
2018
espanolIntroduccion: suelen usarse diversos indices dieteticos para medir la calidad de la nutricion en edades avanzadas. Sin embargo, ninguno de ellos fue disenado para evaluar la nutricion con el objetivo de evitar discapacidades en la poblacion anciana. Objetivos: identificar en la literatura cientifica los “nutrientes e ingestas” involucrados en el envejecimiento, asi como proponer un nuevo indice, considerando esta informacion, que sirva para evaluar la calidad de la nutricion con objeto de prevenir enfermedades relacionadas con el envejecimiento. Metodos: se realizo una revision bibliografica, obteniendo informacion sobre los nutrientes asociados con el envejecimiento. Todos estos nut…
Information retrieval in digital documents : a variation patterns of procedural execution
2013
The research activity of information on the internet has become common in our daily life. Despite this fact, it still raises many problems for the user who does not find the information they want or is lost to the amount of information available. This study aims at testing a new patented preview device, enabling users to browse and view pages in depth. The task is to find a target apartment with one or more specific criteria in a real estate agency designed website. Several conditions were tested. The “usual” condition with the classic search features, page by page, the other "transparent" condition which enables you to preview selected pages and select only relevant pages. We are intereste…