Détruire, dit-elle

I L’entretien a pris la forme de plusieurs échanges par mail, enregistrement face à face, auto-enregistrement, puis le texte que voici. Fury a synthétisé ainsi ses réponses aux questions – rappelées pour mémoire, pour « récapituler ». L’artiste avait intitulé ce texte, tel un document de travail : « fury détruire récap », intégrant ce quasi monologue à sa pratique dont la destruction est constitutive, l’envie de faire et de défaire s’entremêlant. La mise en forme finale et les coupes sont not..

Machinability of TiNb bio-compatible alloys

The success of biomedical implantation is linked to osseointegration, depending on the mechanical loading of the bone interface. The large difference in stiffness between the host bone (30 GPa) and the usual implant material (over 100 GPa), as well as the absence of mechanical stress at the surrounding bone, induce a stress shielding effect, which leads to bone atrophy and implant loss. A recent work has shown the possibility to produce so-called second-generation titanium alloys. β-type Ti alloys have been studied for biomedical applications, due to the composition of non-cytotoxic elements. Some TiNb alloys can reach after heat treatment a Young’s modulus close to 35 GPa, which is really close to bone’s one. Unfortunately, titanium and its alloys are well known for their poor machinability due to the hardness and low thermal conductivity. Machined surfaces of titanium alloys are also easily damaged (micro cracks, build-up edge, plastic deformation, heat-affected zones, and tension residual stresses) during the process. Studying process parameters is important to avoid these phenomena. The machinability of TiNb (turning, milling) has not been studied to date. Therefore, in this study, we examined the behavior of the TiNb titanium alloy for applications as a biomaterial in micro-cutting. Orthogonal cutting tests were performed on austenite and martensite states TiNb alloys and compared with Ti40 pure titanium. The aim was to evaluate the influence of the alloys and the cutting parameters on the evolution of the cutting forces, specific cutting energy, friction coefficient which are good indicators of machinability

Effects of pre-exercise, endurance, and recovery designer sports drinks on performance during tennis tournament simulation

Peltier, SL, Lepretre, PM, Metz, L, Ennequin, G, Aubineau, N, Lescuyer, JF, Duclos, M, Brink, T, and Sirvent P. Effects of pre-exercise, endurance, and recovery designer sports drinks on performance during tennis tournament simulation. J Strength Cond Res 27(11): 3076-3083, 2013Sports drinks are often used before, during, and after tennis tournaments, but their ability to influence physiological and psychological variables and the characteristics of tennis match play remains uncertain. The objective of this study was to evaluate the impact of ingesting specially formulated pre-exercise, endurance, and recovery sports drinks on glycemia and performance indices during a simulated tennis tournament. Eight well-trained male tennis players performed two 3-match round-robin tennis tournaments although ingesting sports drinks (SPDs) or placebos (PLAs) before, during, and after each match (crossover study design). Before the first tournament, match and drink order were randomized (SPDs or PLAs first) and players were placed under controlled nutritional and hydration conditions. Glycemia, heart rate response, rate of perceived exertion, and notational/match analysis were assessed during each match. Sports drinks maintained higher glycemia levels during match 2 and 3 of the tennis tournament compared with PLAs (p < 0.01). Moreover, higher mean heart rates (p < 0.01) and stroke frequencies (p < 0.01) concomitantly with lower rates of perceived exertion (p < 0.01) were recorded throughout the duration of the tournament, when players used the SPDs. During a 3-match tennis tournament, SPDs allow higher stroke frequency during play, with decreased rates of perceived exertion

Performance-enhancing effects of a specific sports-drink protocol on fatigue during repeated singles tennis match play

The purpose of this study is to investigate the response of a sports drink protocol on fatigue during repeated singles tennis match play in a placebo-controlled, double-blind crossover study. Eight well-trained tennis players participated in this study. Notational analysis, match intensity, perception of the effort, speed, agility, aerobic endurance, heart rate, blood glucose levels and neuromuscular fatigue were investigated before and after each tournament. The sports drink protocol had a positive effect on the players' perceived efforts, the latter felt less general and muscular fatigue. Moreover, higher game intensity, higher blood glucose levels, higher average heart rate and less fatigue on the triceps brachii after the matches were observed with the sports-drink protocol

Performance-enhancing effects of a specific sports-drink protocol on fatigue during repeated singles tennis match play

The purpose of this study is to investigate the response of a sports drink protocol on fatigue during repeated singles tennis match play in a placebo-controlled, double-blind crossover study. Eight well-trained tennis players participated in this study. Notational analysis, match intensity, perception of the effort, speed, agility, aerobic endurance, heart rate, blood glucose levels and neuromuscular fatigue were investigated before and after each tournament. The sports drink protocol had a positive effect on the players' perceived efforts, the latter felt less general and muscular fatigue. Moreover, higher game intensity, higher blood glucose levels, higher average heart rate and less fatigue on the triceps brachii after the matches were observed with the sports-drink protocol

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Ce numéro de Perspective est consacré aux manières dont l’histoire de l’art peut penser les actes de destruction qui touchent les œuvres dans leur dimension matérielle, conceptuelle, symbolique, voire métaphysique. Si la guerre et, en miroir, la question de la préservation et de la protection du patrimoine figurent bien au centre d’une telle thématique, celle-ci ne saurait pour autant se réduire à la violence de l’anéantissement, la destruction ne pouvant se comprendre que dans son rapport dialectique à la construction. Les différentes contributions rassemblées ici abordent ces pratiques à travers la diversité des motifs qui les sous-tendent (religieux, rituels, ludiques, guerriers, polémiques, etc.), en interrogeant les moyens de leur documentation et la mémoire qui en subsiste. De l’Égypte pharaonique au monde contemporain occidental, des Premières Nations de la côte nord-ouest de l’Amérique au continent africain moderne et contemporain, les questions du vandalisme et de l’iconoclasme y sont déployées, jusqu’à explorer la fécondité du geste destructeur et la manière dont les artistes s’en sont diversement emparé. Ce numéro est en vente sur le site du Comptoir des presses d'universités. Comité de rédaction du volume Laurent Baridon, Cécile Colonna, Ralph Dekoninck, Pierre-Olivier Dittmar, Dario Gamboni, Jérémie Koering, Rémi Labrusse, Jean-Yves Marc, François Michaud, Philippe-Alain Michaud, Jean-Claude Schmit