Academic literature on the topic 'Additifs physiques'
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Journal articles on the topic "Additifs physiques"
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Hart, Elizabeth A., Mark R. Leary, and W. Jack Rejeski. "Tie Measurement of Social Physique Anxiety." Journal of Sport and Exercise Psychology 11, no. 1 (March 1989): 94–104. http://dx.doi.org/10.1123/jsep.11.1.94.
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A 12-item self-report scale was developed to assess the degree to which people become anxious when others observe or evaluate their physiques. The Social Physique Anxiety Scale (SPAS) demonstrated both high internal and test-retest reliability. It also correlated appropriately with concerns regarding others' evaluations and with feelings about one's body. Validity data showed that women who scored high on the SPAS were heavier and had a higher percentage of body fat than those who scored lower. In addition, high scorers reported significantly greater anxiety during a real evaluation of their physiques, further supporting the validity of the scale. Possible uses of the SPAS in basic research involving physique anxiety and in applied fitness settings are discussed.
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Agrawal, Sanat, and Akshay Jain. "Physical Modelling of Nanda Devi National Park, a Natural World Heritage Site, from GIS Data." Cartographica: The International Journal for Geographic Information and Geovisualization 57, no. 2 (July 1, 2022): 179–94. http://dx.doi.org/10.3138/cart-2021-0025.
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Une méthode a été mise au point afin de produire, par fabrication additive (FA), un modèle physique du Parc national de Nanda Devi (PNND), site qui figure sur la Liste du patrimoine naturel mondial de l’UNESCO, afin de faciliter la communication entre les parties qui interviennent dans la gestion de la conservation de ce parc. Les données obtenues par SIG fournissent des valeurs d’élévation pour la surface du terrain uniquement et ne sont pas définies en 3D. Le fichier de format DEM ASCII XYZ est converti au format STL, en 3D, avec une base et des côtés. Les lacunes et les singularités dans les données sont prises en compte. La méthode par fabrication additive ouvre de vastes possibilités pour la conservation et la réhabilitation des sites de l’UNESCO. À partir de cette méthode, un modèle physique du PNAD a été créé. Le modèle a énormément de potentiel pour le suivi à long terme des sites du patrimoine mondial et de la chaine himalayenne. Il peut servir de moyen de communication efficace pour les gestionnaires de la conservation. Des modèles physiques des bassins des vallées glaciaires ou du pic de la Nanda Devi enrichiraient encore nos connaissances. Le travail de recherche pourrait s’étendre à la fabrication de modèles de plus grandes dimensions du PNND, ou à la modélisation de zones plus petites du PNND, en consultation avec les parties concernées.
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Zartaloudi, A., and D. Christopoulos. "Social physique anxiety and physical activity." European Psychiatry 64, S1 (April 2021): S759. http://dx.doi.org/10.1192/j.eurpsy.2021.2011.
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IntroductionSocial Physique Anxiety is defined as an emotional response that reflects individuals’ concerns regarding the way their body may be observed or judged by others.ObjectivesTo explore the relationship between physical activity and social physique anxiety.MethodsA literature review haw been made through pubmed database.ResultsSocial Physique Anxiety is negatively related to participation in physical activity and commitment to exercise. Studies examining the relationship between motivation and social physique anxiety have shown that external motivations, such as improving muscle tone and body attractiveness, are directly linked to social physique anxiety. In addition, social physique anxiety is negatively related to self-efficacy. Individuals who believe that they will be judged by others to be ineffective are less likely to be engaged in physical activity programs. Social Physique Anxiety has been linked to negative effects on mental health such as low self-esteem, smoking and eating disorders.ConclusionsGiven all the negative effects of social physique anxiety, as it is responsible for a wide range of health-related behaviors, it is important to identify physical activity-related motivational mechanisms in order to reduce the impact of social physique anxiety.DisclosureNo significant relationships.
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Fontayne, Paul. "Effet du genre sur le choix et le rejet des activités physiques et sportives en Éducation Physique et Sportive : une approche additive et différentielle du modèle de l'androgynie." Science & Motricité, no. 45 (2002): 45–66. http://dx.doi.org/10.3917/sm.045.0045.
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M.T., Khamdamova. "Somatometric Characteristics Of Women Of The First And Second Period Of Adulthood Using Different Contraceptives With Different Body Types." American Journal of Medical Sciences and Pharmaceutical Research 2, no. 08 (August 20, 2020): 69–76. http://dx.doi.org/10.37547/tajmspr/volume02issue08-10.
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This article describes the characteristics of the anthropometric parameters of women of the first and second period of adulthood who use various contraceptives of different weights and physiques-in addition to height and weight, the characteristics of the pelvis size are presented – interosseous, intercostal, intervertebral sizes, external conjugate.
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Batool, Fauzia, and Ansa Quratulain. "Mediating Effect of Self-Efficacy on Social Media Addiction, Appearance-Related Consciousness, and Social Physique Anxiety among Young Adults." Journal of Professional & Applied Psychology 4, no. 4 (December 31, 2023): 579–93. http://dx.doi.org/10.52053/jpap.v4i4.212.
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Across the world, social media usage has become a very common leisure activity; however, its excessive use may lead to its misuse or social media addiction. This abuse of social media in turn may affect one's self-efficacy; giving birth to several issues such as increased appearance-related consciousness and social physique anxiety. Therefore, the purpose of the study was to examine the direct and indirect relationship of social media addiction with appearance-related consciousness and social physique anxiety through self-efficacy as a mediator among young adults. A convenient sample of 200 young adults fulfilling the criteria of social media addiction was selected from different universities in Islamabad, Pakistan. To assess the study variables, Berger Social Media Addiction Scale (BSMAS), Appearance-Related Social Media Consciousness (ASMC) scale, Social Physique Anxiety Scale (SPAS), and Generalized Self Efficacy Scale (GSE) were used. The study concluded significant relationships between the study variables. Social media addiction was significantly and positively found to be related to both appearance-related consciousness and social physique anxiety. Moreover, Self-efficacy was negatively related to appearance-related consciousness and social physique anxiety. In addition, mediation analysis found that self-efficacy is not a significant mediator between social media addiction, appearance-related consciousness, and social physique anxiety. The findings of this study highlighted how addictive use of social media can increase serious issues among today's youth. Awareness programs regarding social media use should be conducted to mitigate such concerns.
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Reel, Justine J., Katherine M. Jamieson, Sonya SooHoo, and Diane L. Gill. "Femininity to the Extreme: Body Image Concerns among College Female Dancers." Women in Sport and Physical Activity Journal 14, no. 1 (April 2005): 39–51. http://dx.doi.org/10.1123/wspaj.14.1.39.
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Dancers, like other athletes and performers, are faced with the pressure to obtain a particular body shape and size that stems from varied etiological factors (e.g., personality characteristics, demands of the dance environment) (Robson, 2002). This study examined specific concerns for college dancers by utilizing quantitative and qualitative forms of inquiry. The purpose of the initial phase was to assess weight-related pressures, social physique anxiety, and disordered eating in college female modern dancers (N=107) using the Weight Pressure in Dance (Reel & Gill, 1996), Social Physique Anxiety Scale (Hart, Leary, & Rejeski, 1989), and The Eating Disorder Inventory (Garner, 1991). An overwhelming majority (76%) of the dancers reported pressures to lose weight with the most commonly cited stressor being the mirror followed by costumes, performance advantage, comparison to other dancers, and landing the best roles. The mean social physique anxiety score was moderate, but 35 dancers exhibited a high degree of social physique anxiety. In addition, the dancers had a lower tendency toward disordered eating compared to college females (Garner, 1991). The second phase of the study confirmed that modern dancers experience unique pressures. Through qualitative inquiry, the participants’ individualized experiences related to body image and the culture of modern dance could be shared.
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Prasetyaningrum, Putri Taqwa, and Rias Ilham Agung Nugroho. "PENERAPAN SIMPLE ADDITIVE WEIGTHING PEMILIHAN KAYU UNTUK PEMBUATAN GITAR." JUSIM (Jurnal Sistem Informasi Musirawas) 5, no. 01 (May 31, 2020): 1–12. http://dx.doi.org/10.32767/jusim.v4i01.757.
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Wood is the main material for making guitars, if the wood selected is not suitable, then the guitars produced may not be perfect wood selection is not yet optimal if it only relies on one criterion, there must be a systematic and accurate calculation when selecting wood in order that the guitar produced can be perfect, when the guitar was sold, there would be no more complaints about it, such as inferior sound, fragile body, etc. One of the means to assist calculation is the Simple Additive Weighting (SAW) method,which can calculation the value of wood, criteria of wood, and value of each sub-criteria of wood, so that the wood chosen after the calculation would be suitable for marketing. After going through the stages of wood data testing from’fajar musik’, and the calculation also used predetermined criteria, namely sound quality, wood age, wood physique, and wood texture/pattern.
Keywords - guitar, wood, selection decision support, simple additive weighting
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Sörensen, Uwe. "Ein neuer Nachweis der regional seltenen Kugelfliege Acrocera orbiculus (Fabricius, 1787) (Dipt. Acroceridae) in Schleswig-Holstein." Faunistisch-Ökologische Mitteilungen, no. 12 (November 16, 2023): 23–31. http://dx.doi.org/10.38072/2699-7762/p21.
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A record of the spider fly Acrocera orbiculus in 2022, a species rarely found in Schleswig-Holstein, is described. In addition to the circumstances of the observation and the physique of the caught specimen, the special biology and distribution of the species and family of spider flies are discussed.
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Mohd Johan, Mohd Remie, Md Azalanshah Md. Syed, and Hamedi Adnan. "Physique brand identity persuasiveness in social media message content." Jurnal Pengajian Media Malaysia 24, no. 1 (June 1, 2022): 17–34. http://dx.doi.org/10.22452/jpmm.vol24no1.2.
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This study focuses on how Malaysian micro SMEs, in this case, food truck (FT) businesses, could digitally utilize social media as an effective branding tool for their products and services and create significant customer value to survive in the local competitive market. It is crucial for Malaysian SMEs (food truck, FT) operators to convince their customers through social media message content, specifically on what is being posted on their social media page. Thus, we examined the different aspects of persuasive message content taking place on social media. A qualitative approach using semi-structured interviews was employed to explore the SME food and beverage service industry. In addition, interviews were conducted with independent food truck founders and owners in Kuala Lumpur, Malaysia. This study yielded results that showed respondents' interest in physique brand identity persuasion in social media platforms. Creating an excellent physique brand identity persuasion recognized by its customers through social media has become an important activity for food truck (FT) owners to communicate their brand digitally.
Dissertations / Theses on the topic "Additifs physiques"
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Martial, Frédérique. "Détection et évolution des additifs du polypropylène à l'aide de la SFC et du couplage SFE/SFC : influence sur les propriétés physiques du polypropylène." Rouen, 1995. http://www.theses.fr/1995ROUES050.
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Le polypropylène (PP) est un matériau polyvalent de plus en plus utilisé. Pour éviter qu'il se dégrade rapidement, on lui ajoute des additifs de stabilisation. Au cours du temps, ils sont consommés et on observe parallèlement le vieillissement du PP qui se caractérise par une évolution de ses propriétés. L'objectif de nos travaux était de relier la disparition des additifs avec l'évolution des propriétés mécaniques du PP vieilli, dans le but de prévoir son temps de vie en fonction de sa stabilisation et d'appliquer ces résultats au problème du recyclage. Nous avons dans un premier temps optimisé une méthode d'extraction et d'analyse des additifs en utilisant le couplage SFE/SFC (extraction par fluide supercritique/chromatographie par fluide supercritique). L'étude de l'influence des différents paramètres nous a permis de mettre au point une technique de caractérisation fiable et reproductible et d'obtenir des rendements d'extraction appréciables. Nous avons dans un deuxième temps appliqué cette technique à l'évolution d'un antioxydant contenu dans le polypropylène. Nous avons d'une part étudié la disparition de l'additif par couplage SFE/SFC, et d'autre part suivi les propriétés mécaniques du PP au cours de son vieillissement thermique. Des corrélations entre allongement et contrainte à la rupture avec la concentration en additif ont été établies et peuvent être utilisées dans le cadre du recyclage du PP. Les différents résultats obtenus nous ont donc permis d'atteindre notre objectif pour l'antioxydant étudié
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Robinet, Antonin. "Étude expérimentale de l'extinction d’incendie au sein de véhicules militaires terrestres." Electronic Thesis or Diss., Bourges, INSA Centre Val de Loire, 2024. http://www.theses.fr/2024ISAB0010.
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Les systèmes d'extinction incendie aujourd'hui employés pour la protection des véhicules militaires terrestres utilisent le gaz FM200, qui répond à une exigence du protocole de Montréal sur les espèces qui réduisent la couche d'ozone. Cependant, le potentiel de réchauffement global important de ce gaz appelle aujourd'hui à un remplacement urgent. En parallèle, la recherche sur le brouillard d'eau s'est intensifiée depuis les années 1990, en tant que dispositif d'extinction sans appauvrissement de la couche d'ozone, ni potentiel de réchauffement global. Dans le cadre de cette thèse, l'objectif est d'étudier la faisabilité d'un brouillard d'eau additivée comme système d'extinction incendie pour la protection des compartiments moteurs de véhicules militaires et civiles. En effet, l'eau pulvérisée sous forme de brouillard peut être additivée de substances qui modifient ses propriétés physico-chimiques et procurent à la solution résultante de meilleures caractéristiques et des performances d'extinction accrues. Une revue exhaustive de la littérature a notamment permis de mettre en évidence l'existence paradoxale des solvants, espèces hautement inflammables, comme additifs pour le brouillard d'eau. Afin de pouvoir quantifier l'ajout de ces espèces sur les performances d'extinction, une première étape a consisté à caractériser l'interaction entre une flamme et un brouillard d'eau, en présence d'une ventilation variable. Des mesures de vélocimétrie par imagerie de particules ont notamment permis d'identifier des valeurs critiques de ventilation et de pression d'injection. Dans un second temps, un brouillard d'eau additivée aux solvants, en concentrations variables, a été étudié au travers de sept alcools primaires linéaires, du méthanol à l'heptanol. Une analyse statistique a permis d'identifier le pentanol et le butanol comme les meilleurs alcools primaires linéaires en tant qu'additifs pour le brouillard d'eau. La diminution du temps d'extinction par rapport à l'eau seule provient du refroidissement accru de la zone de la flamme apporté par les additifs alcoolisésThe fire extinguishing systems currently used to protect military land vehicles use the gas FM200, which meets a requirement of the Montreal Protocol on species that deplete the ozone layer. However, its significant global warming potential means it urgently needs to be replaced. At the same time, research on water mist has intensified since the 1990s, as a fire extinguishing system that neither depletes the ozone layer nor has a global warming potential. The aim of this thesis is to study the feasibility of a water mist with additives as a fire extinguishing system for the protection of the engine compartments of military and civilian vehicles. The finely sprayed water can be added with substances that modify its physical and chemical properties and give the resulting solution improved characteristics and extinguishing performance. An exhaustive review of the literature has highlighted the paradoxical existence of solvents, highly flammable species, as additives for the water mist. In order to quantify the impact of these species on the extinguishing performance, the first step was to characterize the interaction between a flame and a water mist, in the presence of variable ventilation. Particle image velocimetry measurements were used to identify critical values for ventilation and injection pressure. Secondly, a solvent-added water mist in varying concentrations was studied using seven linear primary alcohols, from methanol to heptanol. A statistical analysis identified pentanol and butanol as the best linear primary alcohols as water mist additives. The reduction of the extinguishing time compared with only water is due to the increased cooling of the flame zone provided by the alcohol additives
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Mokrani, Nabil. "Effet des paramètres physiques et d’additifs sur l'allumage du n-décane par claquage laser non résonant." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2062/document.
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L’allumage par claquage laser non résonant des mélanges réactifs considérés à l’état gazeux et au repos est étudié dans ce travail, principalement avec des mélanges n-décane/air (C₁₀H₂₂+N₂+O₂). Ce système est considéré comme étant prometteur dans les différentes stratégies futures concernant les systèmes d’allumages équipant les moteurs à combustion interne. Le plasma d’allumage est généré en focalisant un faisceau laser de haute intensité pendant quelques nanosecondes. Le laser Nd :YAG opère à 1064 nm, il est choisi comme source laser pour l’ensemble des expériences menées en laboratoire afin de montrer l’effet des paramètres physiques, optiques, thermodynamiques (pression) et chimiques (additifs : H₂O, Ar) sur les caractéristiques de l’allumage. Cette étude met en oeuvre une approche statistique sur l’ensemble des expériences en prenant en compte l’ensemble des mesures prises lors de la combustion. Ce manuscrit offre une base de données expérimentale permettant d’appréhender la combustion et la phénoménologie de claquage laserIgnition by non-resonant laser breakdown of quiescent reactive mixtures was considered in this experimental study working with gaseous state. In this work, we mainly study the ignition of n-decane / air (C₁₀H₂₂+N₂+O₂) mixtures. This system is considered promising in different future strategies regarding ignitions systems for internal combustion engines. The breakdown is generated by focusing a high intensity laser beam for a few nanoseconds using Nd: YAG laser operating at 1064 nm, it is chosen as the laser source for all experiments conducted here. The experimental plan conducted allows to examine the effect of physical, optical, thermodynamic (pressure) and chemicals (additives: H₂O, Ar) on the characteristics of the laser ignition. This study implements a statistical approach on all the experimental cases taking into account all the measures during breakdown and combustion. This manuscript provides bibliographic basis for understanding combustion and laser breakdown phenomenology
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Junqua, Remy. "Procédés innovants de stabilisation microbiologique des moûts et des vins." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0910/document.
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La contamination des vins par des microorganismes non désirés peut entraîner une dégradation importante du produit. Pour lutter contre ces problèmes, le dioxyde de souffre (SO2) est l’additif le plus utilisé actuellement pour ses propriétés antiseptiques et antioxydantes. Cependant, la limitation des intrants chimiques dans les vins est une des préoccupations majeures des consommateurs et producteurs. Les procédés de stabilisation physiques existants (flash pasteurisation, filtration tangentielle) présentent quant à eux des inconvénients, tels que leur cout énergétique ou leur maintenance complexe. Deux procédés innovants permettant d’assurer la stabilisation microbiologique des vins en alternative aux procédés classiques sont étudiés : le rayonnement ultraviolet (UV-C) et le chauffage ohmique. Les rayonnements UV-C (100 à 280 nm) sont connus pour leur effet germicide et déjà appliqués dans le traitement de l’eau et des surfaces. Cependant les liquides absorbants, tels que le vin, limitent fortement la profondeur de pénétration du rayonnement et donc l’efficacité du procédé. Un réacteur UV-C hélicoïdal a été développé, basé sur les propriétés hydrodynamiques des vortex de Dean, pour améliorer l’efficacité et l’homogénéité du traitement. Les performances de stabilisation ont été validées pour la première fois en alternative au mutage par SO2 de mouts liquoreux et avant la mise en bouteille de vins finis. De plus, les analyses chimiques et sensorielles menées sur les vins traités ne montrent aucun impact sur la qualité des vins. Le chauffage ohmique est ici utilisé comme procédé de stabilisation thermique des mouts et des vins. Lors du passage d’un courant à travers un matériau ayant une résistance électrique, l’énergie électrique est transformée en énergie thermique. La chaleur est alors générée à l’intérieur même de la matière à traiter. Les résultats des travaux ont montré pour la première fois que la rapidité et l’homogénéité de chauffe permettent une stabilisation efficace des vins et des mouts sans préjudices sur leur qualitéContamination of wines by undesired microorganisms may lead to significant deterioration of the final product. To combat these problems, sulfur dioxide (SO2) is the most widely used additive for its antiseptic and antioxidant properties. However, the limitation of chemical inputs in wines is one of the major concerns of consumers and producers. Existing physical stabilization processes (flash pasteurization, tangential filtration) have disadvantages, such as their energy cost or their complex maintenance. Two innovative processes to ensure the microbiological stabilization of wines as an alternative to conventional processes are studied: ultraviolet radiation (UV-C) and ohmic heating. UV-C radiation (100 to 280 nm) is known for its germicidal effect and already applied in the treatment of water and surfaces. However, absorbent liquids, such as wine, strongly limit the penetration depth of the radiation and hence the efficiency of the process. A helical UV-C reactor was developed, based on the hydrodynamic properties of Dean vortices, to improve the efficiency and homogeneity of the treatment. The stabilization performance was validated for the first time as an alternative to the SO2 mutage of sweet wines and before the bottling of finished wines. Moreover, the chemical and sensory analyzes carried out on the treated wines showed no impact on the quality of wines. Ohmic heating is used in this study as a method of thermal stabilization of musts and wines. During the passage of a current through a material having an electrical resistance, the electrical energy is transformed into thermal energy. The heat is then generated inside the material to be treated. The results of this work showed for the first time that heating rate and homogeneity of ohmic heating allow an effective stabilization of musts and wines without affecting their quality
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Reynier, Alain. "Modelisation et prediction de la migration des additifs des emballages alimentaires." Reims, 2000. http://www.theses.fr/2000REIMS004.
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La prediction de la migration par modelisation mathematique peut etre envisagee pour verifier la conformite d'un materiau plastique utilise en contact alimentaire et pour preciser l'incidence des phenomenes physico-chimiques impliques dans la migration. Dans une premiere partie, la prediction du coefficient de diffusion d'une molecule dans une matrice polymere a ete etudiee a partir de mesures experimentales de coefficients de diffusion. Un panel de composes a ete teste dans quatre polyolefines (vierges puis gonflees par un simulateur d'aliment gras). Ceci a permis de mettre en evidence l'effet du gonflement sur la diffusion. La correlation des diffusivites a la masse molaire des migrants a permis de determiner des groupes de comportement (diffusion rapide par reptation ou plus lente par sauts) selon la forme des molecules. Le concept de volume fractionne pondere par un facteur de forme a ete introduit afin de tenir compte de ces differences liees a la geometrie des migrants. Nous avons ensuite propose une modelisation de la migration qui, pour la premiere fois, prend en compte simultanement les principaux phenomenes impliques dans la migration (evolution de la diffusivite liee au gonflement du materiau par le simulateur sorbe, limitations cinetiques de transfert de matieres a l'interface). Ce modele a ete valide par comparaison a un essai de migration et a permis de montrer les limites d'utilisation des modeles simplifies. Il a de plus ete adapte au cas de l'extraction par solvant en introduisant la notion de solubilite potentielle du solvant dans le polymere, variant au cours du temps en fonction de la concentration en solvant sorbe. Enfin, ce travail propose une evolution de l'approche predictive en discussion dans le cadre de la reglementation europeenne en s'appuyant sur la prediction statistique de coefficients de diffusions surestimes et sur l'utilisation d'un modele adapte a la complexite du processus de migration.
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ELYAMANI, ABDESSAMAD. "Synthese de nouveaux verres de chlorofluorozirconates : etude de leurs proprietes physiques et optiques." Rennes 1, 1989. http://www.theses.fr/1989REN10053.
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Exploration systematique de l'incorporation de chlore dans les verres de fluorozirconate. Etude comparative des systemes binaires zrf::(4)-bafcl et zrf::(4)-srfcl avec les systemes fluores correspondants zrf::(4)-mf::(2) ou m=li, na, k, rb, g. Determination de la zone de formation vitreuse dans les systemes ternaires zr::(4)-baf::(2)-mcl et zrf::(4)-srf::(2)-mcl stabilises par l'adjonction d'autres fluorures tels que laf::(3) et thf::(4). Etude des parametres cinetiques de la devitrification en utilisant les methodes isothermes et non isothermes. Mise en evidence d'une nucleation notable a basse temperature. Definition de domaines de composition de plus grande stabilite. Demonstration de la complexite du mecanisme reel de cristallisation
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Badreddine-Bessa, Anissa. "Etude de la contribution des additions minérales aux propriétés physiques, mécaniques et de durabilité des mortiers." Cergy-Pontoise, 2004. http://biblioweb.u-cergy.fr/theses/04CERG0305.pdf.
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Ce travail propose de quantifier par une méthodologie expérimentale rigoureuse l'effet des additions minérales sur la variation du besoin en eau et du besoin en adjuvant des mortiers, leur contribution au remplissage de la porosité et à l'amélioration des résistances mécaniques ainsi que leur action aux propriétés de transfert et à la résistance chimique en milieu agressif sévère. Les principales variables de formulation sont la nature minéralogique, la finesse et la quantité de l'addition, le type de ciment et son dosage. Les résultats obtenus montrent que les additions, indépendamment de leur nature et jusqu'à une certaine quantité, contribuent à maintenir les propriétés de transfert des mortiers sans former un volume important de nouveaux produits hydratés capables de réduire la porosité ouverte. En revanche, la nature et la finesse des additions sont déterminantes pour leur contribution au développement des résistances mécaniques et dans un moindre degré à la résistance chimiqueThis work proposes to quantify by a rigorous experimental methodology the effect of mineral additions on the water requirement and the superplasticizer requirement variation of mortars, their contribution to filling the porosity and to improving the mechanical strength, and their action to the transfer properties and to the chemical resistance in hard aggressive medium. The principal mixture proportion variables are the mineralogical nature, fineness and quantity of the addition, the cement type and proportioning. The obtained results show that the additions, independently of their nature and until a certain quantity, contribute to maintain the mortars transfer properties without forming a high volume of new hydrated products able to reduce open porosity. On the other hand, the additions nature and fineness are determining for their contribution to the mechanical strength development and in a lesser extent to the chemical resistance
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Badreddine-Bessa, Anissa Gallias Jean-Louis. "Etude de la contribution des additions minérales aux propriétés physiques, mécaniques et de durabilité des mortiers." [S.l.] : [s.n.], 2008. http://biblioweb.u-cergy.fr/theses/04CERG0305.pdf.
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Glaris, Patrice. "Ingénierie de surface de matériaux composites pour l’aéronautique : chimie et topographie de surface, une aide au démoulage ?" Thesis, Le Mans, 2013. http://www.theses.fr/2013LEMA1027/document.
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Actuellement, les moules utilisés pour la réalisation de pièces composites aéronautiques sont à base d'alliages métalliques (FeNi, Invar) très appréciés pour leur faible coefficient de dilatation. Toutefois, ces alliages présentent plusieurs inconvénients (poids, prix, délais de livraison) qui incitent les industriels à se toumer vers d'autres matériaux. Dans ce contexte, les matériaux composites époxy/fibres de carbone sont une altemative intéressante compte tenu de leurs propriétés mécaniques proches del'Invar tout en alliant légèreté et facilité de mis en æuvre. Cependant, avec de tels moules des phénomènes d'adhésion risquent d'intervenir entre la résine époxyde infusée, constituant la future pièce, et le moule lui-même composé d'une résine époxyde. Leur nature proche est susceptible de favoriser des phénomènes de diffusion ou d'interactions moléculaires impliqués dans l'adhésion des polymères.Les travaux présentés dans cette thèse ont donc pour but de minimiser l'ensemble des phénomènes favorisant I'adhésion entre deux résines époxydes (l'une étant réticulée au contact de la seconde). Pour cela, les travaux sont concentrés sur la modification pérenne de la physicochimie ainsi que de la topographie de surface de la résine époxyde composant le moule. Ces deux paramètres sont en effet identifiés comme indispensables pour l'obtention de surfaces au caractère faiblement mouillant, pré-requis pour une bonne adhésion avec un tiers corps. Dans un premier temps, la physicochimie de surface de la résine du moule a étémodifiée durablement grâce à un additif fluoré préalablement greffé à la résine époxyde. Le mécanisme de fluoration de la surface a été étudié et une étape cruciale de migration de l'additif fluoré vers I'interface air / résine au cours de réticulation a été identifiée. Dans un deuxième temps, une rugosité contrôlée à l'échelle micrométrique est appliquée à la surface de la résine ainsi modifiée. Les propriétés de surface qui en découlent sont étudiées et montrent une accentuation du caractère faiblement mouillant des résines fluorées. Enfin, les propriétés d'interfaces entre les résines époxydes modifiées constituant le moule et une résine époxyde vierge représentant une pièce injectée sont étudiées via un test mécanique. Les résultats obtenus (force et type de rupture) sont mis en relation avec les propriétés superficielles de la résine époxyde modifiéeCurrently , the molds used for making aircraft composite piecess are made of metal alloys ( FeNi Invar ) popular for their low coefficient of expansion. However, these alloys have several drawbacks ( weight, price , delivery time ) which encourage manufacturers to rotate to other materials. In this context, the epoxy composites / carbon fibers are an interesting altemative given their mechanical properties similar to Invar while combining lightness and ease of implementation . However , with such molds, phenomena of adhesion may occur between the infused epoxy resin constituting the future piece , and the mold itself made of an epoxy resin. Their close nature promotes diffusion phenomena or molecular interactions involved in the adhesion of polymers.The works presented in this thesis is therefore to minimize all phenomena promoting the adhesion between two epoxy resins (one being cured in contact with the second). To do this, the work is focused on sustainable change in the physicochemistry and the surface topography of the epoxy resin component mold. These two parameters are indeed identified as essential for obtaining surfaces prerequisited low wetting character , for good adhesion with a third body. At first , the physicochemistry of the resin surface of the mold was permanently changed using a fluorinated additive grafted beforehand on the epoxy resin. The mechanism of fluorination of the surface has been studied and a critical step in migration of the fluorinated additive towards the air / resin interface during curing has been identified. In a second step , a controlled micrometer scale roughness is applied to the surface of the resin as amended . The surface properties arising are studied and show an accentuation of low wetting character of fluorinated resins . Finally, the properties of interfaces between the modified epoxy resins constituting the mold and blank epoxy resin representing a molded part are studied via a mechanical test. The results obtained ( strength and type of failure ) are put in contact with the surface of the modified epoxy resin properties
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Lagrange, Jean-Pierre. "Contribution à l'étude du dopage bore, azote et phosphore dans le diamant." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10210.
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Le diamant est un semi-conducteur a large bande interdite (5. 4 ev) tres prometteur en electronique a haute temperature et de forte puissance. Cependant, son utilisation est limitee par l'absence d'un dopage de type n. Nous avons etudie dans cette these le dopage au bore du diamant (type p), et l'incorporation de phosphore et d'azote dans le diamant par implantation ionique. Nous avons elabore des couches minces de diamant par depot chimique en phase vapeur assiste par plasma micro-onde. Nous avons utilise dans notre etude diverses techniques de caracterisation : spectroscopie de diffusion raman, resonance paramagnetique electronique, resistivite en fonction de la temperature (de 100k a 1000k), effet hall, courants thermo-stimules, thermoluminescence. Les resultats obtenus montrent que le dopage au bore est aujourd'hui bien maitrise. Des mesures electriques sur une large gamme de concentration (de 5 10#1#6 a 8 10#2#0 b. Cm#-#3) montrent trois regimes de conduction differents : conduction par saut par plus proche voisin, conduction par la bande de valence, conduction metallique. Nous avons montre pour la premiere fois une saturation de la conductivite et une energie d'activation a haute temperature e#a/2 typique d'un taux de defauts compensateurs inferieur a 10%. Nous avons montre que l'implantation est la methode la plus efficace pour incorporer de l'azote en site substitutionnel dans le diamant. Neanmoins, l'incorporation d'azote semble induire indirectement des defauts paramagnetiques dans le diamant. Nous avons aussi montre que l'incorporation de phosphore en site substitutionnel est possible. Nous avons defini un seuil d'amorphisation compris entre 3 et 4 10#1#4 p. Cm#-#2. Toutefois, un nouveau defaut paramagnetique qui semble etre induit par le phosphore apparait apres recuit. La conduction est encore dominee par les defauts crees par l'implantation ionique. Ces resultats sont tres prometteurs pour des applications futures en microelectronique.
Books on the topic "Additifs physiques"
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G, Compton R., and Hamnett A, eds. New techniques for the study of electrodes and their reactions. Amsterdam: Elsevier, 1989.
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Almada, Anthony L. Sports, Fitness and Physique Foods and Beverages: Active Ingredients and Supplements. Blackwell Publishing Professional, 2007.
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Waterbury, Chad. Elite Physique. Human Kinetics, 2021. http://dx.doi.org/10.5040/9781718225183.
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“Dr. Chad Waterbury has created something truly remarkable with Elite Physique. It’s accessible to lifters of all ages and levels. If you’re serious about improving your strength, physique, and performance, this is the book for you.” Lou Schuler Author of The New Rules of Lifting Elite Physique: The New Science of Building a Better Body is a complete program that is designed specifically for men seeking to build muscle, burn fat, and enhance definition. At its core is a series of self-assessments that, upon completion, will help you identify the best approach to achieving your goal, avoiding setbacks, and maintaining results. Along the way, you will learn how to do the following: • Identify the most effective exercises based on the equipment and time available • Manipulate sets, reps, and frequency to target problem areas • Incorporate advanced training methods • Avoid plateaus and push beyond newbie gains • Alleviate stress on primary joints, especially for staple lifts • Integrate recovery strategies to optimize muscle growth To ensure maximum results, Elite Physique breaks down over 100 of the most effective exercises for developing and defining the chest, arms, shoulders, core, and lower body. In addition to step-by-step instructions, full-color photo sequences, and coaching cues, you’ll have access to an online collection of 50 videos depicting proper exercise technique, common errors, and variations. With customizable programming options for building mass, burning fat, and targeting specific muscle groups, Elite Physique gives you the tools to achieve and maintain your goals. This is your guide—your ticket to transformation.
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Press, Creative Teaching. Power Practice: Timed Tests in Addition and Subtraction, Gr. 2-5. Creative Teaching Press, 2004.
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Tumminello, Nick. Strength Zone Training. Human Kinetics, 2023. http://dx.doi.org/10.5040/9781718225619.
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Don’t waste your time doing workouts that leave large gaps in your strength or load you up with unnecessary, redundant exercises. Take a strategic approach to your workouts by using a proven system that trains strength through each joint’s true full range of motion. Even if you lift, you may still be missing something in your quest to get stronger. Optimal training does not involve training all the muscles; instead, it trains all the ranges (or zones) of each muscle. Many popular exercises work the same muscles the exact same way. Performing redundant exercises is a waste of your time. In Strength Zone Training, renowned personal trainer Nick Tumminello, who has become known as the trainer of trainers, shows you the following: How to build strength through the true full range of motionThe redundant exercises you just don’t need to doThe exercises to maximize upper body and lower body strength that are missing from your workoutThe angles most people don’t do exercises for but shouldThe best exercises to include in your program to train each muscle groupA better strategy to follow when choosing your exercisesBeginner and advanced workout plans for any schedule You’ll find exercises addressing every area of the body, with details on how to perform the exercise as well as coaching tips. Select exercises are depicted with a hybrid of photo and art highlighting the movements, or zones, that provide a training stimulus. You will learn how to combine exercises within a workout in a smarter and more strategic way to collectively train through a full range of motion–resulting in not just an improvement in physique but also an improvement in performance and a reduction in injury risk. In addition to the exercises, you’ll find four chapters of easy-to-follow workout plans you can immediately use at the gym. You can select a fully comprehensive workout plan that is right for you, regardless of your training level or weekly schedule. Strength Zone Training is the blueprint for building muscle with a purpose, making it simple to create workout programs that eliminate exercise redundancy and use full range of motion so you can build a body that is all-around stronger and more durable. Choose your exercises and get ready to dominate! Earn continuing education credits/units! A continuing education exam that uses this book is also available. It may be purchased separately or as part of a package that includes both the book and exam.
Book chapters on the topic "Additifs physiques"
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PEYRE, Patrice. "La physique des procédés de fabrication additive métallique." In La fabrication additive des alliages métalliques 1, 159–207. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9054.ch3.
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Ce chapitre détaille les principes physiques élémentaires des quatre principaux procédés additifs métalliques avec fusion, depuis l’absorption de l’énergie, jusqu’aux régimes de fusion, aux propriétés des zones fondues et aux instabilités hydrodynamiques associées.
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BACROIX, Brigitte. "Les post-traitements en fabrication additive." In La fabrication additive des alliages métalliques 2, 105–67. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9055.ch2.
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Ce chapitre présente une synthèse des différents types de traitements post fabrication additive en distinguant trois catégories : les traitements thermiques, le traitement thermomécanique de CIC, et les traitements de surface. Les principes physiques de ces traitements et leurs effets sur les propriétés des pièces y sont passés en revue.
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CARIN, Muriel. "La simulation numérique des procédés de fabrication additive." In La fabrication additive des alliages métalliques 1, 209–53. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9054.ch4.
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Ce chapitre présente les éléments nécessaires à la simulation numérique des phénomènes physiques en fabrication additive. Les principales équations pour simuler le comportement thermo-hydrodynamique du bain liquide et le comportement thermo-métallurgique et mécanique de la pièce sont présentées. Divers exemples illustrent l’intérêt des outils de simulation, capables de prédire des défauts de surface, des porosités, des risques de fissuration.
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Basdevant, Jean-Louis. "Chapitre 1. Addition des moments cinétiques." In La physique quantique et ses applications, 5–28. De Boeck Supérieur, 2016. http://dx.doi.org/10.3917/dbu.basde.2016.01.0003.
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Helmreich, Stefan, Sophia Roosth, and Michele Friedner. "Time And The Tsunami." In Sounding the Limits of Life. Princeton University Press, 2015. http://dx.doi.org/10.23943/princeton/9780691164809.003.0009.
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This chapter reports on an oceanographic conference held in Goa, India, just after the devastating Indian Ocean tsunami of December 2004. It describes the various kinds of time—of the ocean, of scientific research, of disaster, of governance—through which scientists and others grappled with the disaster and its implications. A last-minute addition to the conference schedule, a talk, “The Recent Seismic Event off Sumatra,” was delivered by Satish Singh, a geoscientist from the Institute de Physique du Globe in Paris. In a setting in which “geological time” had been the organizing catchphrase— and an epistemological mooring for scientific objectivity— Singh's talk came closest to summoning up the uncertainties in scale that characterize oscillating ocean time, the at-sea feeling that attention to watery time can engender.
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Khanna, Julie, and Maryam Saheb-Al-Zamani. "Enhanced Lipocontouring of the Arms." In Enhanced Liposuction - New Perspectives and Techniques [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98807.
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The visibility of arm contour in both men and women has been a source of discussion throughout time. Arm strength and athleticism is not limited to the male physique only. Iconic women such as Madonna and Michelle Obama have made discussions about arm contour more and more commonplace. Over the years arm contour has been a difficult area to address due to the thinness of the skin which often required surgical excision and unsightly scars. Liposuction of the arm has advanced to not only allow for improved contour but also options of refining muscular definition. With the addition of energy-based technologies such as radiofrequency, we can offer less invasive options to patients who may have previously only been candidates for excisional procedures. Liposuction of the arms can be performed under local anesthesia. This chapter introduces a new algorithm for assessment and treatment of arm contour which incorporates newer energy-based devices along with surgical options.
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Fraser, Mark W., Jack M. Richman, Maeda J. Galinsky, and Steven H. Day. "Step 1: Specify the Problem and Develop a Program Theory." In Intervention Research, 45–62. Oxford University PressNew York, NY, 2009. http://dx.doi.org/10.1093/oso/9780195325492.003.0003.
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Abstract Early social researchers were interested in demonstrating whether programs had positive effects on significant social problems such as delinquency, child maltreatment, and drug abuse. They were less interested in showing that programs had positive effects on proximal outcomes such as acquisition of new skills, changes in social support, or compliance with treatment. They tended to focus on long-term outcomes, with emphasis placed on distal effects, and interventions were broadly conceptualized. Consider an example from the 1941 Cambridge-Somerville Youth Study that was designed to test the effects of case advocacy and supportive guidance on delinquency (Powers, Witmer, and Allport 1951). Using a sample of 431 boys in Massachusetts, the researchers matched the study participants on characteristics including age, physique, family discipline, religion, ethnicity, and neighborhood crime. Within pairs, one boy was randomized to an intervention group and the other to a control group. In the intervention condition, the boys began receiving academic tutoring, medical care, and general mentoring when they were about ten-and-a-half, and these supports continued until they reached age sixteen. On average, the case workers visited the boys in their homes twice a month, and also took the boys to sporting events and other community activities. In addition, the intervention group boys participated in program-supported camping trips and summer camps. Well intended, the basic idea behind the intervention was to provide friendly, supportive counsel to high-risk boys and their families. Serious crimes were recorded after age seventeen and used as the outcome measure. At the end of the study period, no significant differences were found between the treatment and control group boys (McCord 1992; Powers, Witmer, and Allport 1951). However, findings from a thirty-year follow-up suggested that the boys in the treatment group fared worse in adulthood and reported higher rates of violent crime and alcoholism than the control group boys (Dishion, McCord, and Poulin 1999; McCord 1992). The follow-up study concluded that supportive counseling was not effective, and suggested that aggregating high-risk youth may have a corrupting and deleterious effect (also called deviancy training, see Gifford-Smith et al. 2005).
Conference papers on the topic "Additifs physiques"
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Yoshida, Michihiro, Tanaka Takayuki, and Yoshio Tsuchiya. "Modeling of changes in lumbar joint stiffness by pelvic tightening based on physique and pelvic alignment." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002614.
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We have been elucidated the mechanism by which pelvic belt reduces lumbar burden. Pelvic tightening increases the lumbar joint stiffness and inhibits the flexion of the lumbar spine in the forward bending. Flexion of the lumbar joint is substituted by the hip joint, which corrects the posture during forward bending and reduces the lumbar burden (lumbar joint torque). The level of the assisting effect of the tightening force has the individual difference, but at present, it is not clear what factors cause it. In this study, we develop a model that represents the assistance effect based on the physique such as height and weight, and the posture and shape of the pelvis and lumbar spine (pelvic alignment).This study developed a regression model that expresses the amount of change in joint stiffness due to tightening force, using the individual physique and pelvic alignment characteristics as input. The joint stiffness was estimated from motion measurement using optical motion capture and obtained from the equation of motion of the link model representing the human body. Pelvic alignment was measured by X-ray images, and five features were obtained: sacral inclination angle (SS angle), pelvic inclination angle (PT angle), inclination angle of the sacrum relative to the pelvis (PI angle), curvature of the lumbar lordosis, and pelvic aperture angle. Among these, the SS angle, PT angle, and PI angle were measured under two conditions: standing and 45 degrees forward bending and obtained a total of eight pelvic alignment features. In addition, height, weight, BMI, and back muscle strength were added as physique characteristics expressing body size and muscle strength, for a total of 12 variable measured. These features were measured on 15 subjects. Among the 12 features, three to four variables were input to the model by excluding those that were strongly correlated with each other and less capable of explaining changes in the target value, joint stiffness.From the proposed model, changes in joint stiffness could be estimated from pelvic alignment and physique characteristics. At large forward bending angles, we found that to obtain a high assistance effect, tilting of the sacrum anteriorly relative to the pelvis and forward tilting of pelvis is necessary. On the other hand, in the mild forward bending, the person who is higher body weight in addition to the forward tilt of the PT and PI angles tend to obtain higher assistive effect.
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Borse, Rajan, and Yahia M. Al-Smadi. "Non-Linear Dynamic Response of Thorax to Impulsive Loading of Cardiopulmonary Resuscitation (CPR)." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51075.
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The purpose of this paper is, to provide the non-linear biodynamic response of thorax through the analytical and numerical simulation methods. Adult thorax data considering sagittal and coronal stiffness in addition to soft and hard tissue material properties will undergo CPR impulsive loading. The numerical simulation is conducted using finite element analysis (FEA) software for modeling biomechanical correct Thorax model to CPR transient loading. AMTI force plate was utilized to record the CPR forces, it accounts for realistic load evaluation during CPR procedure. A dynamic model for numerical simulation includes resonance frequency, damping coefficient, stiffness constant and extinction time for a different kind of physique. The model deflections and forces were analyzed. The maximum deflection obtained from mathematical modelling and ANSYS is found closely related. The result strongly depends on the modeling of the thorax which is used in the numerical simulation. This indicates the necessity of the correlation of the results with the experimental data if available.