Готові списки джерел за темами / Direct aging

Добірка наукової літератури з теми "Direct aging"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Direct aging"

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Mattos, Carla. "Ras: structural details to guide direct targeting." Aging 7, no. 6 (May 30, 2015): 344–45. http://dx.doi.org/10.18632/aging.100754.

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Hecksher, Tina, Niels Boye Olsen, and Jeppe C. Dyre. "Communication: Direct tests of single-parameter aging." Journal of Chemical Physics 142, no. 24 (June 28, 2015): 241103. http://dx.doi.org/10.1063/1.4923000.

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Hofmann, Oliver, and Daniel J. Rixen. "Aging tolerant control of direct injection engines." Control Engineering Practice 77 (August 2018): 201–12. http://dx.doi.org/10.1016/j.conengprac.2018.06.002.

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Hardy, Cara C., Spencer R. Keilich, Andrew G. Harrison, Brittany E. Knight, Dylan S. Baker, and Phillip P. Smith. "The aging bladder phenotype is not the direct consequence of bladder aging." Neurourology and Urodynamics 38, no. 8 (August 26, 2019): 2121–29. http://dx.doi.org/10.1002/nau.24149.

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Ling, Li-Shi-Bao, Zheng Yin, Zhi Hu, Jun Wang та Bao-De Sun. "Effects of the γ″-Ni3Nb Phase on Fatigue Behavior of Nickel-Based 718 Superalloys with Different Heat Treatments". Materials 12, № 23 (30 листопада 2019): 3979. http://dx.doi.org/10.3390/ma12233979.

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The effects of the γ″-Ni3Nb phase on fatigue behavior of nickel-based 718 superalloys with standard heat treatment, hot isostatic pressing + solution treatment + aging, and hot isostatic pressing + direct aging were investigated by scanning electron microscope, transmission electron microscopy, and fatigue experiments. The standard heat treatment, hot isostatic pressing + solution treatment + aging, and hot isostatic pressing + direct aging resulted in the formation of more and smaller γ″ phases in the matrix in the nickel-based 718 superalloys. However, the grain boundaries of the hot isostatic pressing + direct aging sample showed many relatively coarse disk-like γ″ phases with major axes of ~80 nm and minor axes of ~40 nm. The hot isostatic pressing + direct aging sample with a stress amplitude of 380 MPa showed the longest high cycle fatigue life of 5.16 × 105 cycles. Laves phases and carbide inclusions were observed in the crack initiation zone, and the cracks propagated along the acicular δ phases in the nickel-based 718 superalloys. The precipitation of fine γ″ phases in the matrix and relatively coarse γ″ phases in the grain boundaries of the hot isostatic pressing + direct aging sample can hinder the movement of dislocation.
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Kim, Eu Gene, Green Bae, Hye-Young Kwon, and Hyowon Yang. "Aging and direct medical costs of osteoporotic fractures." Journal of Bone and Mineral Metabolism 39, no. 4 (January 8, 2021): 589–97. http://dx.doi.org/10.1007/s00774-020-01192-0.

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Rudkin, George, Timothy A. Miller, and West Los Angeles. "Aging Nasolabial Fold and Treatment by Direct Excision." Plastic and Reconstructive Surgery 104, no. 5 (October 1999): 1502–5. http://dx.doi.org/10.1097/00006534-199910000-00041.

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Rudkin, George, Timothy A. Miller, and Joel Pessa. "Aging Nasolabial Fold and Treatment by Direct Excision." Plastic and Reconstructive Surgery 104, no. 5 (October 1999): 1506–7. http://dx.doi.org/10.1097/00006534-199910000-00042.

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9

Danforth, Douglas R., Laura K. Arbogast, Jamil Mroueh, Moon H. Kim, Elizabeth A. Kennard, David B. Seifer, and Chad I. Friedman. "Dimeric inhibin: a direct marker of ovarian aging." Fertility and Sterility 70, no. 1 (July 1998): 119–23. http://dx.doi.org/10.1016/s0015-0282(98)00127-7.

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Buzzanca, M., V. Carchiolo, A. Longheu, M. Malgeri, and G. Mangioni. "Direct trust assignment using social reputation and aging." Journal of Ambient Intelligence and Humanized Computing 8, no. 2 (September 30, 2016): 167–75. http://dx.doi.org/10.1007/s12652-016-0413-0.

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Більше джерел

Дисертації з теми "Direct aging"

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Oliveira, Dayane Carvalho Ramos Salles de 1987. "Color stability of direct esthetic restorations = Estabilidade da cor de restaurações estéticas diretas." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290398.

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Анотація:
Orientador: Luis Alexandre Maffei Sartini Paulillo
Texto em português e inglês
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-22T09:44:56Z (GMT). No. of bitstreams: 1 Oliveira_DayaneCarvalhoRamosSallesde_M.pdf: 87880082 bytes, checksum: e54ab93e23fb57efbc026ad0a7bd0491 (MD5) Previous issue date: 2013
Resumo: O objetivo deste estudo foi avaliar através de espectrometria FT-IR e espectrofotometria de refletância, a estabilidade da cor de restaurações estéticas em resinas compostas após envelhecimento artificial acelerado (EAA). Para tanto, foram utilizados os sistemas adesivos: convencional de 3 passos - Adper ScotchBond Multi-Purpose (3M/ESPE), convencional de 2 passos - Tetric N Bond (Ivoclar Vivadent), autocondicionante de 2 passos - ClearFill SE Bond (Kuraray) e resinas compostas na cor EA1: nanoparticulada Filtek Z350 XT Supreme (3M/ESPE) e microhíbrida IPS Empress Direct (Ivoclar Vivadent). Espécimes simulando restaurações diretas (n=10) foram confeccionadas, com auxilio de matriz padronizada (4x4x1 mm) sobre substrato dentinário. Restaurações sem sistema adesivo foram utilizadas como controle. As avaliações de cor foram mensuradas com espectrofotômetro (EasyShade Advanced, Vita Zahnfabrik) em duas regiões distintas da restauração: na superfície da resina composta e na interface adesiva, em dois períodos de tempo: 48 h após acabamento e polimento da restauração e após 300 h de EAA com ciclos de 50oC alternados de 4 h de condensação e 4 h de exposição com luz UV. Os espécimes foram aferidos sob fonte de luz padronizada com irradiância espectral relativa D65 (Gti MiniMatcher, Gti Graphic Technology Inc.). Os dados do sistema CIE L*a*b* foram utilizados para o cálculo do ?E, ?L, ?a e ?b pela diferença de cada coordenada final pela inicial. Para análise do grau de conversão (GC) das resinas compostas utilizadas, espécimes com 4 mm de diâmetro (n=10) foram confeccionados e após 48 h analisados em espectrômetro FT-IR Spectrum 100 (Perkin Elmer). Os resultados obtidos foram analisados pela análise de variância a dois fatores e teste de Tukey (?=0,05). Os sistemas adesivos não interferiram na alteração de cor (?E) do corpo da restauração (?=0,90) ou da interface de união (?=0,78). Por outro lado, o fator resina composta foi significativo para a estabilidade de cor (?E) e para os valores das coordenadas isoladas (?<0,001). Em relação ao GC, a resina IPS Empress Direct apresentou resultados superiores (67%) frente a Z350XT (61%) com diferença estatisticamente significante (?<0,001). Desta forma, concluiu-se que o sistema adesivo não foi capaz de alterar a cor final de restaurações estéticas diretas. Entretanto, em relação para o fator resina composta foi encontrada diferença quanto à estabilidade da cor pelo EEA e ao GC, no qual a IPS Empress Direct apresentou resultados superiores
Abstract: The aim of this study was tm po evaluate the color stability and degree of conversion of esthetic composite resin restorations after accelerated artificial aging (AAA) by FT-IR and reflectance spectrometry. Thus, two etch and rinse adhesive systems - Adper ScotchBond Multi-Purpose (3M/ESPE) and Tetric N Bond (Ivoclar Vivadent) and one two-step self-etching bond system - ClearFill SE Bond (Kuraray) were used with two EA1 shade composite resins: Filtek Z350 XT nanofilled (3M/ESPE) and IPS Empress Direct microhybrid (Ivoclar Vivadent). The restored specimens (n=10) were made with standardized dimensions using a silicon mold under dentin substrate (4x4x1mm). The color were measured with a spectrophotometer (EasyShade Advanced, Vita Zahnfabrik) on composite resin surface and bond interface: 48 hours after finishing and polishing procedures; after 300 hours of AAA with 50oC cycles with 4 hours of condensation and 4 hours of UV exposure. Specimens were measured in a color-assessment cabinet (Gti MiniMatcher, Gti Graphic Technology Inc.) with a light source simulating the spectral relative irradiance of CIE standard illuminant D65. The CIE L*a*b* data were used to calculate the ?E, ?L, ?a and ?b by the difference between each final and initial coordinate. The degree of conversion (DC) of the composite resins used was measured using 4x4x1 mm samples (n=10). The DC analysis was performed using a FT-IR spectrometer Spectrum 100 (Perkin Elmer) after 48 hours. Data were submitted to two-way ANOVA and Tukey test (?=0.05). As the results, the adhesive systems had no significant influence on the color stability (?E) of the restoration surface (?=0.90) or the bonding interface (?=0.78). Moreover, the composite resin factor was significant and influenced the color as measured by ?E and isolated coordinates (?<0.001). As for the DC, IPS Empress Direct resin showed better results (67%) compared to Z350XT (61%) with statistically significant differences (?<0.001). Therefore, the adhesive system could not affect the final color of direct esthetic restorations. On the other hand, IPS Empress Direct showed better results of DC and color stability after EEA
Mestrado
Dentística
Mestra em Clínica Odontológica
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2

Blair, Jeffrey A. "Luteinizing hormone in the central nervous system: a direct role in learning and memory." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1523397060445531.

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3

Zhang, Qi. "Three Essays on Demographic Changes and International Trade." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/31936.

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Chapter 1: A Population Aging Analysis for Canada Using the National Transfer Accounts Approach: This analysis develops a new data set for Canada using an accounting methodology called National Transfer Accounts (NTA). NTA permits building an accounting system that introduces age into national accounts. NTA is consistent with the conventional national accounts and allows the estimation of lifecycle patterns for labour income and consumption from private and public sources. It also allows the calculation of per capita and aggregate lifecycle deficits (LCD) or surpluses (LCS) in an economy. In this chapter we calculate Canada’s per capita and aggregate LCD for 2006. Using demographic projections for the next five decades, we present the aggregate LCD in Canada for the period 2006 to 2056 assuming a constant per capital LCD during this time horizon. The projection results show that labour income needs to increase rapidly or consumption needs to be cut significantly to compensate for the pressure on the aggregate lifecycle deficit as a result of population aging. Chapter 2: An Overlapping Generations Computable General Equilibrium (OLG-CGE) Model with Age-dependent Rates of Time Preference: This analysis develops a methodology to introduce an age-dependent rate of time preference to calibrate an OLG-CGE model with per capita age profile consumption path derived from the NTA framework of Chapter 1. The results show that the economic impact from an aging population will be significant. The living standard will decline by 15% from the present to 2050 and decline by 20% by the year 2105. To reduce such a decline, the Canadian government may introduce policies that could encourage labour force participation. We analyze the impact of: a) an increase in the general labour force participation rate for age 20 to 64; b) an increase in the labour force participation rate for workers aged 50 to 64; c) late retirement. Our results suggest that maintaining the current standard of living will be extremely difficult after 2026. Nevertheless, this would help reduce the economic pressure from population aging. Chapter 3: 9/11 Security Measures and North American Security Perimeter: A Computable General Equilibrium Analysis: The objective of this analysis is to assess the impact of the North American Security Perimeter (NASP) on both the Canadian and the U.S. economies. The NASP is a change in Canada-U.S. security paradigm that would allow the liberalization of the post 9/11 security measures at the Canada-U.S. border. This study applies a multi-sector and multi-region general equilibrium model together with econometric analysis. After simulating the NASP, Canada’s capital market was found to become more attractive. Under the NASP, the welfare of Canada is estimated to increase by $19 billion or 1.8% of GDP, and that of the U.S. is estimated to increase by $32 billion or 0.3% of GDP.
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4

Kovaltchouk, Thibaut. "Contributions à la co-optimisation contrôle-dimensionnement sur cycle de vie sous contrainte réseau des houlogénérateurs directs." Thesis, Cachan, Ecole normale supérieure, 2015. http://www.theses.fr/2015DENS0033/document.

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Les Energies Marines Renouvelables (EMR) se développent aujourd’hui très vite tant au niveau de la recherche amont que de la R&D, et même des premiers démonstrateurs à la mer. Parmi ces EMR, l'énergie des vagues présente un potentiel particulièrement intéressant. Avec une ressource annuelle brute moyenne estimée à 40 kW/m au large de la côte atlantique, le littoral français est plutôt bien exposé. Mais l’exploitation à grande échelle de cette énergie renouvelable ne sera réalisable et pertinente qu'à condition d'une bonne intégration au réseau électrique (qualité) ainsi que d'une gestion et d'un dimensionnement optimisé au sens du coût sur cycle de vie. Une première solution de génération tout électrique pour un houlogénérateur a d’abord été évaluée dans le cadre de la thèse de Marie RUELLAN menée sur le site de Bretagne du laboratoire SATIE (ENS de Cachan). Ces travaux ont mis en évidence le potentiel de viabilité économique de cette chaîne de conversion et ont permis de poser la question du dimensionnement de l’ensemble convertisseur-machine et de soulever les problèmes associés à la qualité de l’énergie produite. Puis une seconde thèse a été menée par Judicaël AUBRY dans la même équipe de recherche. Elle a consisté, entre autres, en l’étude d’une première solution de traitement des fluctuations de la puissance basée sur un système de stockage par supercondensateurs. Une méthodologie de dimensionnement de l’ensemble convertisseur-machine et de gestion de l’énergie stockée fut également élaborée, mais en découplant le dimensionnement et la gestion de la production d’énergie et de ceux de son système de stockage. Le doctorant devra donc : 1. S’approprier les travaux antérieurs réalisés dans le domaine de la récupération de l’énergie des vagues ainsi que les modèles hydrodynamiques et mécaniques réalisés par notre partenaire : le LHEEA de l’Ecole Centrale de Nantes - 2. Résoudre le problème du couplage entre dimensionnement/gestion de la chaîne de conversion et dimensionnement/gestion du système de stockage. 3. Participer à la réalisation d’un banc test à échelle réduite de la chaine électrique et valider expérimentalement les modèles énergétiques du stockage et des convertisseurs statiques associés - 4. Proposer une méthodologie de dimensionnement de la chaine électrique intégrant le stockage et les lois de contrôle préalablement élaborées 5. Déterminer les gains en termes de capacités de stockage obtenus grâce à la mutualisation de la production (parc de machines) et évaluer l’intérêt d’un stockage centralisé - 6. Analyser l’impact sur le réseau d’une production houlogénérée selon divers scenarii, modèles et outils développés par tous les partenaires dans le cadre du projet QUALIPHE. L’exemple traité sera celui de l’Ile d’Yeu (en collaboration avec le SyDEV
The work of this PhD thesis deals with the minimization of the per-kWh cost of direct-drive wave energy converter, crucial to the economic feasibility of this technology. Despite the simplicity of such a chain (that should provide a better reliability compared to indirect chain), the conversion principle uses an oscillating system (a heaving buoy for example) that induces significant power fluctuations on the production. Without precautions, such fluctuations can lead to: a low global efficiency, an accelerated aging of the fragile electrical components and a failure to respect power quality constraints. To solve these issues, we firstly study the optimization of the direct drive wave energy converter control in order to increase the global energy efficiency (from wave to grid), considering conversion losses and the limit s from the sizing of an electrical chain (maximum force and power). The results point out the effect of the prediction horizon or the mechanical energy into the objective function. Production profiles allow the study of the flicker constraint (due to grid voltage fluctuations) linked notably to the grid characteristics at the connection point. Other models have also been developed to quantify the aging of the most fragile and highly stressed components, namely the energy storage system used for power smoothing (with super capacitors or electrochemical batteries Li-ion) and power semiconductors.Finally, these aging models are used to optimize key design parameters using life-cycle analysis. Moreover, the sizing of the storage system is co-optimized with the smoothing management
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Tognan, Malik. "Etude de dégradations des performances de Piles à Combustible PEM BT alimentées en H2/O2 lors de campagnes d'endurance : du suivi de l'état de santé en opération à la modélisation du vieillissement." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0047/document.

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Les travaux développés dans cette thèse traitent de la thématique du vieillissement des Piles à Combustible (PàC) à Membranes Echangeuses de Protons Basse Température (PEM BT). L’utilisation d’une PàC dans un contexte stationnaire à l’intérieur d’une batterie H2 (tandem PàC/Electrolyseur avec un étage de stockage H2 voire O2) est envisagée dans le cadre du déploiement d’un micro-réseau insulaire basé sur des sources d’énergie renouvelables (éolien et photovoltaïque). Deux aspects connexes associés à l’utilisation de la PàC et à son vieillissement dans cet environnement sont investigués dans ce travail de thèse : d’une part la manière dont les performances de la PàC et son rendement vont se dégrader au cours du temps et d’autre part les méthodes et outils qui vont être utilisés pour évaluer son état de santé durant sa période d’activité. La première de ces deux thématiques est abordée via l’étude d’une base de données d’essais en endurance à courant constant effectués sur des prototypes de stack PEM BT fonctionnant en H2/O2. L’hétérogénéité du vieillissement pour les différents stacks testés est mise en avant, de même que le découplage entre les pertes d’étanchéité interne et les dégradations des performances en tension au courant nominal durant les différentes campagnes. Une méthodologie proposant une dissociation des dynamiques réversibles et irréversibles de décroissance de la tension de la PàC au cours du temps est ensuite exposée et sert de base à la construction d’un modèle de dégradation de la tension sur un fonctionnement à courant fixe. Le modèle montre des résultats encourageants et une perspective liée à son utilisation dans le cadre du pronostic est suggérée. La question de la sensibilité du vieillissement aux variations dynamiques de la charge est ensuite abordée de manière complémentaire à ces essais d’endurance (effectués à charge constante) via une campagne de vieillissement effectuée sur des monocellules hybridées ou non directement par des supercondensateurs et cyclant sur un profil de courant dynamique. Une comparaison des évolutions des performances des monocellules au cours du temps dans les deux cas (hybridé et non-hybridé) est effectuée et met en avant l’effet du cyclage dynamique sur la dégradation des performances des PàC. La deuxième thématique touchant les méthodes et outils dédiés à l’évaluation de l’état de santé de la PàC durant son fonctionnement est introduite dans la suite de ces travaux en se penchant notamment sur une des causes majeures de la fin de vie des PàC : l’accroissement du crossover d’H2 vers l’O2 lié à la perte d’étanchéité interne de la membrane. Des mesures de tension à vide (OCV) effectuées lors de phases d’arrêt/démarrage sont scrutées a posteriori pour une des campagnes de la base de données d’essais en endurance. L’objectif est de rechercher des éventuelles corrélations entre l’accroissement des fuites internes et l’évolution de ces mesures au cours du temps afin de développer des potentiels indicateurs des fuites internes. Une séquence opératoire de mise en gaz mettant en avant un lien entre le niveau de crossover d’H2 et la vitesse d’effondrement de l’OCV pour certaines cellules du stack est identifiée et reproduite à l’occasion d’une campagne complémentaire d’essais. Une dernière partie du manuscrit est finalement consacrée à une approche théorique prospective dédiée à l’intégration d’un phénomène parasite, l’oxydation du Pt, dans la modélisation des performances statiques et dynamiques d’une PàC. Les retombées attendues portent sur l’amélioration de l’interprétation des caractérisations menées régulièrement (EIS, OCV, balayages sinus de forte amplitude aux très basses fréquences…), permettant le suivi du vieillissement
This thesis work deals with the thematic of the Low Temperature Proton Exchange Membrane (PEM LT) Fuel Cell (FC) aging. The use of a FC inside a H2 battery (association of a FC, an electrolyzer and H2 / O2 tanks) in a stationary context is considered in an island micro-grid based on renewable energies (wind and solar power). Two axes linked with the FC use and aging in this context are investigated in this work: one of the axes is centered in the study of the FC performance decrease dynamics over time and the other on the development of methods and tools dedicated to the state of health monitoring during the FC operation. The first thematic is introduced through the exploitation of several aging campaigns performed on PEM FC stack prototypes under constant current solicitations. The stacks considered are fed with pure O2 on the cathode side. A focus is made on the aging heterogeneity inside the stacks and a decoupling between the nominal voltage degradation dynamics and the development of the H2 internal leak with time is highlighted for the different stacks and campaigns. A generic methodology dissociating the reversible and the irreversible voltage losses dynamics is proposed and is further used as a basis to model the nominal voltage degradation with time. The model built in this way is showing encouraging results and its potential use for prognostic purpose is suggested. Whereas these investigations focus on the FC performance degradations under constant current solicitation, the impact of load current dynamic variations on the FC aging is also treated with an experimental study performed on single cells. An ageing campaign under a dynamic load profile is performed on several single cells directly hybridized or not by supercapacitors. The hybridized cells are cycling on an almost-constant current profile whereas the non-hybridized cells are cycling on a dynamic one. A comparison of the performances evolution with time in both cases (hybridized and nothybridized) is done and highlights the effect of the dynamic cycling on the FC performance degradation. The second thematic dealing with the FC state of health evaluation is introduced with one of the main causes of the FC end-of-life: the development of the H2 internal leak between the anode and cathode compartments. Open Circuit Voltage (OCV) measurements performed during start-up and shut-down routines phases are scanned a posteriori in one of the aging campaign of the database. The objective is to seek some potential correlations between those OCV measurements and the H2 internal leak increase over time in order to develop internal leak indicators. A gases introduction operating sequence highlighting a link between the internal leak level and the OCV drift for some stack’s cells is identified during some start-up phases and reproduced during a complementary campaign. A last part of the manuscript is finally dedicated to the integration of a parasitic mechanism (the Pt oxidation) into the FC theoretical quasi-static and dynamic performance modeling. The model integrating this phenomenon is showing some abilities to explain and analyze several experimental features observed on classical performance characterization measurements (EIS, OCV measurements, large amplitude sinus sweep at very low frequency…), opening some perspectives for the FC state of health monitoring
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ESTRELA, CAMILA RODRIGUES. "UNIVERSITY EXTENSION PROGRAMS DIRECTED TOWARDS THE THIRD AGE: THE PHENOMENON OF AGING SEEN IN THE PRIVATE LOGIC." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21028@1.

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Анотація:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
A pesquisa focou atenção nos fundamentos dos programas de extensão universitária desenvolvidos por quatro universidades privadas do município do Rio de Janeiro para o segmento envelhecido. Apoiou-se na compreensão do processo de socialização da gestão do processo de envelhecimento, abordando-o enquanto um fenômeno social determinado pela dinâmica dos modos de produção, e por isso, atravessado pelas particularidades das classes sociais. O estudo concentrou-se nos fundamentos desses programas tendo em vista o processo de mercantilização da universidade acentuado com a Reforma da Educação Superior, vivenciado mais intensamente a partir da década de 1990, a extensão universitária sofreu alterações em sua dinâmica de atividade educacional num sentido de empobrecimento e de sucateamento da mesma. A pesquisa de cunho qualitativo analisou as falas dos coordenadores dos programas investigados, mostrando como os mesmos têm abordado o envelhecimento enquanto um processo homogêneo de formação e por isso, com pouca contribuição para a mudança das condições de reprodução social sobre as quais o mesmo se dá. Da mesma forma, considerou também o papel da extensão universitária, possibilitando perceber que esta instância embora esteja articulada com o ensino e a pesquisa desenvolvidos nas universidades pesquisadas, ele está marcado predominantemente pela lógica da prestação de serviços, através da manutenção do discurso da vivência de uma terceira idade ativa e saudável, oferecendo cursos e atividades que legitimam o desenvolvimento da responsabilidade individual pelo processo de envelhecimento.
The research focused attention on the fundamentals of university extension programs developed by four private universities in the municipality of Rio de Janeiro for the segment aged. He leaned in understanding the socialization process of the management of the aging process, approaching it as a social phenomenon determined by the dynamics of modes of production, and therefore crossed the particularities of social classes. The study focused on the fundamentals of these programs to the process of commercializing university accented with the Higher Education Reform, experienced more intensely from the 1990s, the university extension unchanged from its educational activity in a dynamic sense impoverishment and scrapping it. The qualitative research analyzed the speeches of the coordinators of the programs investigated, showing how they have addressed the aging process as a homogeneous formation and therefore with little contribution to the changing conditions of social reproduction on which the same is true . Likewise, also considered the role of university extension, enabling realize that although this instance linked with teaching and research developed at universities surveyed, it is marked predominantly by the logic of service, by maintaining the experience of a speech Seniors active and healthy by offering courses and activities that legitimize the development of individual responsibility by the aging process.
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Qin, Jing. "The effects of transcranial direct current stimulation (tDCS) on balance control in Parkinson's disease (PD)." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/211438/1/Jing_Qi_Thesis.pdf.

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Spokes, Tara. "Ageing and Cognitive Inhibition: An ERP analysis." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/365459.

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Impaired cognitive inhibition is one of a number of changes in cognitive functioning that are associated with healthy ageing. Cognitive inhibition is the ability to suppress or withhold some cognitive process and includes the ability to block out distracting information. Successful cognitive inhibition underlies improved performance on a range of executive functions including problem solving, long-term planning and goal-directed behaviour (Darowski, Helder, Zacks, Hasher, & Hambrick, 2008). One theory posits that age-related deficits in cognitive inhibition may underlie general cognitive decline associated with older adults (Hasher & Zacks, 1988; Hasher, Zacks, & Rahhal, 1999). Previous behavioural studies have found that automatic, or unintentional cognitive inhibition is preserved with age while controlled, intentional cognitive inhibition is impaired in older adults (Collette, Germain, Hogge, & Van der Linden, 2009). In contrast, a number of neuroimaging studies suggest that older adults show less differentiation than young adults in neural processing of automatic and controlled tasks. In particular, it has been suggested that automatic tasks are processed more like controlled tasks, suggesting increased cognitive effort required to complete them (Germain & Collette, 2008).
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Applied Psychology
Griffith Health
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Cooper, Jamie Johnson. "The Self-directed Learning Actions of Women Regarding the Menopause Transition." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6484.

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Research indicates that increased knowledge about the menopause transition positively impacts a woman’s attitude about this stage in her life, and a more positive attitude leads to less distress during the transition. However, there has been no research regarding how women gain this knowledge about menopause, what factors in her environment may hinder or assist her, or how women’s knowledge of menopause is leveraged by health care providers to help facilitate her menopause transition. The purpose of this research was to explore the self-directed learning actions of women regarding their search for information about menopause, and to understand what factors, if any, may have helped or hindered her search. A convenience sample of women 35-55 years of age was invited to participate in an online survey; a total of 227 usable responses were collected. Answers were analyzed by utilizing a simple frequency distribution to illustrate more and less common responses. Chi-square tests of independence were used to examine bivariate relationships, and content analysis was used to examine free response answers. The results of this study indicated that most women did not seek information about menopause on their own. Women who sought information were primarily motivated by symptoms: what to expect, symptom relief, or validation that their experiences were normal. This study also indicated that the most utilized resource for finding information was the Internet. It also found that women need more information from the health care community than they were receiving. Findings from this study suggest a need to continue to connect adult education with health promotion. Additionally, women had a need for greater interpersonal support and beneficial interactions with the health care community. Finally, this study demonstrated that women may benefit from the normalization of menopause as a social construct. Perhaps this could best be achieved through education within larger conversations about human reproduction and about natural aging.
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Baker, Nicole. "Muscle Stem Cell Fate is Directed by the Mitochondrial Fusion Protein OPA1." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41974.

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During aging there is a decline in (MuSCs) and muscle regeneration, though the underlying reason is unknown. Interestingly, mitochondrial fragmentation is a common feature in aging, however, how this impacts MuSC function and maintenance has not been investigated. To address the effect of mitochondrial fragmentation in MuSCs, we generated a knockout mouse model using the Pax7CreERT2 inducible system to target deletion of the mitochondrial fusion protein Opa1 specifically within MuSCs (Opa1-KO). Analysis of MuSC function following muscle injury revealed a defect in the regenerative potential of Opa1-KO MuSCs. Moreover, following injury there was a substantial decrease in the number of MuSC in Opa1-KO animals with a concomitant increase in the number of committing cells, illustrating that loss of Opa1 drives MuSC towards commitment at the expense of self-renewal. Furthermore, loss of Opa1 in MuSCs alters the quiescence state, priming MuSCs for activation, as indicated by a reduction in quiescence-related genes, increased EdU incorporation, and enhanced cell cycle kinetics. To address the impact of mitochondrial dysfunction on muscle stem cell capacity, we generated a model of chronic Opa1 loss. Analysis of muscle stem cell function 3 months after Opa1 ablation revealed mitochondrial dysfunction and a defect in proliferation upon activation, leading to failed muscle regeneration. These data are the first to demonstrate a novel role for mitochondrial structure in the regulation of MuSC maintenance and regenerative capacity.
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Книги з теми "Direct aging"

1

Mabry, J. Beth. Direct care worker training for aging clients with developmental disorders. Harrisburg, Pennsylvania: Center for Rural Pennsylvania, 2010.

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United States. Congress. Senate. Special Committee on Aging. The impact of direct-to-consumer drug advertising on seniors' health and health care costs: Hearing before the Special Committee on Aging, United States Senate, One Hundred Ninth Congress, first session, Washington, DC, September 29, 2005. Washington: U.S. G.P.O., 2006.

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United States. Congress. House. Select Committee on Aging. Direct mail solicitations to the elderly: Hearing before the Select Committee on Aging, House of Representatives, One hundredth Congress, first session, February 4, 1987. Washington: U.S. G.P.O., 1987.

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Pushing the envelope: Publishers Clearing House in the new era of direct marketing : report of the Special Committee on Aging, United States Senate. Washington: U.S. Government Printing Office, 2014.

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United States. Congress. House. Select Committee on Aging. Subcommittee on Housing and Consumer Interests. High pressure, low benefits: Unfair practices in selling Medigap and other insurance to the elderly : hearing before the Subcommittee on Housing and Consumer Interests of the Select Committee on Aging, House of Representatives, One Hundredth Congress, first session, June 24, 1987. Washington: U.S. G.P.O., 1989.

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United States. Congress. Senate. Special Committee on Aging. Marketing or medicine: Are direct-to-consumer device ads playing doctor? : hearing before the Special Committee on Aging, United States Senate, One Hundred Tenth Congress, second session, Washington, DC, September 17, 2008. Washington: U.S. G.P.O., 2009.

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United States. Congress. Senate. Special Committee on Aging. Direct-to-consumer advertising of prescription drugs: What are the consequences? : hearing before the Special Committee on Aging, United States Senate, One Hundred Eighth Congress, first session, Washington, DC, July 22, 2003. Washington: U.S. G.P.O., 2003.

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Marketing or medicine: Are direct-to-consumer device ads playing doctor? : hearing before the Special Committee on Aging, United States Senate, One Hundred Tenth Congress, second session, Washington, DC, September 17, 2008. Washington: U.S. G.P.O., 2009.

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United States. Congress. Senate. Special Committee on Aging. Direct-to-consumer advertising of prescription drugs: What are the consequences? : hearing before the Special Committee on Aging, United States Senate, One Hundred Eighth Congress, first session, Washington, DC, July 22, 2003. Washington: U.S. G.P.O., 2003.

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Office, General Accounting. Social security: Implementation of new mental impairment criteria for disability benefits : report to the chairman, Special Committee on Aging, United States Senate. Washington, D.C: The Office, 1986.

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Частини книг з теми "Direct aging"

1

Woods, Adam J., Daria Antonenko, Agnes Flöel, Benjamin M. Hampstead, David Clark, and Helena Knotkova. "Transcranial Direct Current Stimulation in Aging Research." In Practical Guide to Transcranial Direct Current Stimulation, 569–95. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-95948-1_19.

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Tracy, Richard E. "Direct Imaging of the Hypothetical Quantity, Sequestered Lipid." In The Role of Aging in Atherosclerosis, 103–18. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0263-8_10.

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Clinco, Judith B. "Direct Caregivers Association: An Option for a Rapidly Growing Aging Population?" In The Care of the Uninsured in America, 187–94. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-78309-3_13.

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Solevid, Maria, and Ann-Ida Scheiber Gyllenspetz. "Capability and Political Participation Among Ageing Populations." In International Perspectives on Aging, 233–48. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-78063-0_17.

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AbstractIn this chapter, we study reasons for, and conceptions of, non-voting among Swedish seniors. We present a tentative framework for studying capability and political participation among older people in which we combine insights from previous research on age, health and political participation from the perspective of capability; that is, what a person is effectively able to be and do. The empirical illustration is based on extended interviews with eight individuals, both voters and non-voters, aged 80 years or older. The results show that the concepts of internal and combined capabilities are fruitful when understanding conceptions of and reasons for non-voting. For some individuals, voting is simply too much of an effort, and they need to direct their capabilities towards other, more desirable, functionings. For other individuals, health and mobility issues would have hindered their ability to vote if it were not for the practical and social support of close relatives. The chapter ends with a discussion on the importance of continuing to integrate explanations at different levels in order to understand political (in)activity among older individuals.
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Kokkinakis, Dimitrios. "eHealth Literacy and Capability in the Context of the Pandemic Crisis." In International Perspectives on Aging, 109–29. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-78063-0_9.

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AbstractThe rapidly increasing size of the ageing population, and in particular older adults living alone, requires the incorporation of eHealth into social and healthcare services, in order to choose the best way to manage their needs and demands for health and medical care. The purpose of this brief scoping study is to describe and identify an important dimension in this context, namely eHealth literacy (eHL) and its relation to health-promoting behaviours among older adults within the capability theoretical framework. The chapter examines some aspects of eHL and recent research highlighting the importance of eHL and the direct correlation between eHL and quality of life for older adults within the capability context. To make this more specific and explicit, this study takes into consideration outstanding circumstances, such as those caused by a pandemic crisis, namely the coronavirus disease 2019 (COVID-19). Since the COVID-19 pandemic has required urgent action and rapid containment, it offers a unique opportunity to test and evaluate the readiness of healthcare systems and to rapidly develop, scale up and enhance eHealth for the benefit of older people. However, this comes with a price, which is the necessity to quickly and effectively navigate complex information environments and manage behavioural changes and health.
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Siren, Anu. "Beyond Accessibility: Transport Systems as a Societal Structure Supporting Inclusion in Late-Life." In International Perspectives on Aging, 327–38. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51406-8_25.

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AbstractMobility is associated with well-being, and an age-inclusive transport system is a prerequisite for satisfactory mobility throughout the life course. Yet a transport system – including the physical characteristics of environments, planning processes, design, and policies – involves more than allowing people and goods to move from one location to another. Rather, it is an arena of everyday life, related not only to direct service accessibility but also to wider social inclusion. If the structures surrounding late life transport mobility can match the changing needs of older adults in a changing society, they have the potential for supporting good ageing and social inclusion. Accessibility problems can be targeted through single-domain interventions, such as online shopping, telemedicine and care at home. However, targeting the loss of social inclusion caused by lack of transportation requires a broader understanding of transport as a social structure. This chapter reviews the scholarship on the links between transport mobility, well-being and social inclusion or exclusion. To demonstrate the mismatch between individual aspirations and surrounding structures, it revisits the concept of “structural lag” from the transport perspective. It also gives an overview of knowledge gaps related to transport and social inclusion or exclusion in late life.
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Nicolaÿ, Alexis, Jean-Michel Franchet, Nathalie Bozzolo, and Jonathan Cormier. "Metallurgical Analysis of Direct Aging Effect on Tensile and Creep Properties in Inconel 718 Forgings." In Superalloys 2020, 559–69. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51834-9_54.

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Iao-Xiang, Wangx, Wang Wei-qi, and Hui Song-xiao. "Influences of Direct Aging on the Mechanical Properties and Microstructure of Hot Rolled BTi-6554 Alloy Bars." In Proceedings of the 13th World Conference on Titanium, 441–43. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119296126.ch106.

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Durzan, D. J. "Adult vs. Juvenile Explants: Directed Totipotency." In Plant Aging, 19–25. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-5760-5_3.

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Kucharczyk, Maciej. "Social Exclusion in Older-Age and the European Pillar of Social Rights." In International Perspectives on Aging, 421–31. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51406-8_33.

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AbstractThe European Pillar of Social Rights is about delivering new and more effective rights for Europeans. It builds upon 20 key principles, structured around three categories: equal opportunities and access to the labour market; fair working conditions; and social protection and inclusion. Directly relevant to older people, the Pillar has the potential to address the multidimensionality of exclusion in later life from a rights-based perspective – for example, by enhancing the rights to quality and affordable health and long-term care, to adequate pensions to live in dignity, to age-friendly working conditions and an inclusive labour market, or to access goods and services. Despite these valuable elements, there remains significant uncertainly around how the Pillar will achieve this and what kind of implemental actions might emerge across member states. This chapter analyses the potential of the European Pillar to address social exclusion of older people in Europe, the challenges that might impede its efforts, and the measures necessary to overcome such challenges.
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Тези доповідей конференцій з теми "Direct aging"

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Cao, W. D., and R. L. Kennedy. "Application of Direct Aging to Allvac 718Plus Alloy for Improved Performance." In Superalloys. TMS, 2005. http://dx.doi.org/10.7449/2005/superalloys_2005_213_222.

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Luthy, Thierry, Gion Barandun, Philipp Biner, and Paolo Ermanni. "Linear direct current (LDC) resistance measurement for online LCM-process monitoring." In SPIE's 5th Annual International Symposium on Nondestructive Evaluation and Health Monitoring of Aging Infrastructure, edited by George Y. Baaklini, Carol A. Nove, and Eric S. Boltz. SPIE, 2000. http://dx.doi.org/10.1117/12.385499.

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Nazaripoor, Hadi, John Sunny, Ahmed Hammami, and Pierre Mertiny. "Mechanical Performance of Aged Long Fibers: Direct Water Exposure and Temperature Effect." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-83931.

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Abstract Long fiber-reinforced composite materials consist of continuous fibers with high strength and modulus embedded in either a thermoset or thermoplastic matrix. The resulting composite material provides a combination of properties that cannot be achieved with either of the constituents acting alone. In composite structures, fibers are the primary load-carrying element, whereas the matrix transfers stress to and between the fibers while protecting them from adverse environmental conditions and mechanical damages. While thermosetting matrices provide a high level of protection against water permeation, exposure to moisture may still be significant in certain thermoplastics. Therefore, the effect of moisture on the reinforcing elements and the degradation rate may be considerable. The presented study investigated the effects of environmental aging conditions on different commercially available continuous fibers, i.e., glass fiber, carbon fiber, and basalt fiber. The fibers were soaked in water at room and elevated temperature to investigate the degradation mechanisms and, ultimately, the mechanical performance of the fibers. Mechanical testing was performed with wet fibers and dried fibers after aging. In addition, scanning electron microscopy was employed to explore the responsible mechanism for fiber degradation by environmental aging.
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Srinivasan, Dheepa, and Dayananda Narayana. "Microstructural Evolution Of LPBF AlSiMg – Effect Of Water Quenching Vs Furnace Cooling Vs Direct Aging." In ASME 2021 Gas Turbine India Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gtindia2021-75837.

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Abstract The heat treatment response of AlSi10Mg via laser powder bed fusion (LPBF) has been studied via detailed microstructural characterization. The effect of solutioning (S) and water quenching (WQ) vs furnace cooling (FC), and direct aging (DA) vs solutioning and aging (SA), has been analysed, for microstructure and tensile properties. 11 heat treatments were carried out to map the partitioning of Si, starting with stress relieving at 200 °C vs 300 °C, followed by solution heat treatment at 430°C vs 530 °C, water quenching vs furnace cooling, aging at 160 °C vs direct aging at 160 °C, to establish the microstructure of LPBF AlSi10Mg alloys for potential applications. The microstructure at 430 °C and 530 °C shows Si precipitate fractions of 25% and 14%, respectively. Room temperature mechanical properties, revealed the 300 °C, 2 h stress relieved sample with the highest strength and ductility (YS of 230 MPa and 16%). At 430 °C, both water quenching and furnace cooling showed similar strengths and 16% elongation, while at 530 °C, there was a much lower elongation (8–9%) with the T6 (53 °C, WQ, SA) showing higher strength and elongation. This study brings out the importance of being able to choose the heat treatments suitable to AlSiMg part geometry, via LPBF additive manufacturing for various applications.
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Laurenciu, Nicoleta Cucu, Yao Wang, and Sorin D. Cotofana. "A direct measurement scheme of amalgamated aging effects with novel on-chip sensor." In 2013 IFIP/IEEE 21st International Conference on Very Large Scale Integration (VLSI-SoC). IEEE, 2013. http://dx.doi.org/10.1109/vlsi-soc.2013.6673283.

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P, Kathirvel. "Observation of Aging Effect on One Step Direct Injection Flame Synthesized Nano Alumina." In Proceedings of the First International Conference on Combinatorial and Optimization, ICCAP 2021, December 7-8 2021, Chennai, India. EAI, 2021. http://dx.doi.org/10.4108/eai.7-12-2021.2315113.

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Nikles, David E., Charles E. Forbes, Harris A. Goldberg, Robert E. Johnson, Rachel S. Kohn, and Frank J. Onorato. "Accelerated Aging Studies for Organic Optical Data Storage Media." In Optical Data Storage. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/ods.1989.tub3.

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This paper reports the results of some accelerated aging studies for HCC organic WORM media. The goal of these studies was to obtain aging data for disks exposed to high tempera­ture and high humidity. The data allowed a direct comparison with the results for other commercial media.
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Fong, Jeffrey T., William F. Ranson, Reginald I. Vachon, and Pedro V. Marcal. "Structural Aging Monitoring via Web-Based Nondestructive Evaluation (NDE) Technology." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61607.

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To assist owners and operators in real-time on-site monitoring and damage assessment of aging structures, we propose an “aging structure monitoring system” using direct measurements and web-based transmission technology. Such a system from field detection of surface or subsurface cracks to computer modeling/analysis/verification of simulated fatigue crack growth with ultimate delivery of remaining life prediction, is designed to have four major components: (1) The system is capable of transmitting from the field via internet to the office computer direct measurement data that are being collected in the field by personnel using handheld optical scanners to read bar-code-like strain gages either laser bonded (permanent marking) or adhesively bonded to selected critical high stress areas of the surface of a structure. (2) The office computer has a customized database that stores not only relevant geometric and material property data with variability information, but also a history of prior loadings, cumulated strain (plastic) measurements and fatigue crack length or crack tip opening displacement measurements. Such database is constantly being updated and enhanced with variability estimates subsequent to an event on a continouus or periodic inspection basis. (3) Using a minimum of four commercially-available finite-element method (FEM) packages, e.g., ABAQUS, ANSYS, LS-DYNA, and MPAVE, a numerical simulation experiment is conducted on real time using a fracture mechanics and fatigue damage theory-based deterministic model and the direct measurement data. This model is capable of predicting remaining lives for selected future loading scenarios. (4) The results of the FEM simulations are verified via a web-based statistically designed experiment using DATAPLOT where an uncertainty-bounded estimate of the remaining lives of the structure for selected loadings is delivered in real time to the field for decision making. Significance and limitations of this web-based direct-measurement approach to fatigue modeling are discussed.
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Hofmann, Oliver, Thomas Ponn, Robert Buchmann, and Daniel Rixen. "Nonlinear Predictive Control of Combustion and Emissions in Direct Injection Engines with Nozzle Aging." In 2018 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2018. http://dx.doi.org/10.1109/aim.2018.8452324.

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Zhang, Chengcheng, Chunyang Li, Hong Zhao, and Baozhong Han. "A review on the aging performance of direct current cross-linked polyethylene insulation materials." In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2015. http://dx.doi.org/10.1109/icpadm.2015.7295368.

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Звіти організацій з теми "Direct aging"

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Migliori, Albert, and Susan M. Ennaceur. Toward an understanding of aging in plutonium from direct measurements of stored energy. Office of Scientific and Technical Information (OSTI), December 2018. http://dx.doi.org/10.2172/1489909.

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Small, Ward, Taylor M. Bryson, Amitesh Maiti, B. William Choi, Dennis C. Freeman, Jeremy M. Lenhardt, James P. Lewicki, Thomas S. Wilson, and Eric B. Duoss. Synopsis of Mechanical Aging and Fatigue Testing of Llama50 Ink for Direct-Ink-Write 3D Printing. Office of Scientific and Technical Information (OSTI), March 2019. http://dx.doi.org/10.2172/1544974.

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Small, W. Radiation Aging of Siloxane Specimens Additively Manufactured by the Direct-Ink-Write (DIW) 3D Printing Technique. Office of Scientific and Technical Information (OSTI), August 2019. http://dx.doi.org/10.2172/1558855.

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Small, Ward, Cindy T. Alviso, and Tom R. Metz. Gamma Radiation Aging Study of a Dow Corning SE 1700 Porous Structure Made by Direct Ink Writing. Office of Scientific and Technical Information (OSTI), November 2015. http://dx.doi.org/10.2172/1240974.

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Small, Ward, Mark A. Pearson, Amitesh Maiti, Thomas R. Metz, Eric B. Duoss, and Thomas S. Wilson. Thermal Aging Study of a Dow Corning SE 1700 Porous Structure Made by Direct Ink Writing: 1-Year Results and Long-Term Predictions. Office of Scientific and Technical Information (OSTI), November 2015. http://dx.doi.org/10.2172/1240976.

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