Search results for "MPI"

Combined effect of elastic energy and myoelectrical potentiation during stretch-shortening cycle exercise.

1982

In addition to the utilization of muscle's elastic energy enhancement of performance in exercise involving stretch-shortening cycle might be also due to simultaneous increase of myoelectrical activity. This hypothesis was tested by examining three athletes during jumping exercise on force-platform. Vertical jumps were performed with and without preliminary counter-movement, and the jumps were called counter-movement jump (CMJ) and squatting jump (SJ), respectively. In both conditions several jumps were performed also with extra loads on the shoulders (15–220% of b. wt.). Additional droppingjumps (DJ) were executed from different heights (20–100 cm). During jumping exercise myoelectrical act…

Acute and prolonged reduction in joint stiffness in humans after exhausting stretch-shortening cycle exercise.

2002

The purpose of the present study was to examine the acute and long-term fatigue effects of exhausting stretch-shortening cycle (SSC) exercise on the stiffness of ankle and knee joints. Five subjects were fatigued on a sledge apparatus by 100 maximal rebound jumps followed by continuous submaximal jumping until complete exhaustion. Neuromuscular fatigue ef- fects were examined in submaximal hopping (HOP) and in maximal drop jumps (DJ) from 35 (DJ35) and 55 cm (DJ55) heights on a force plate. Additional force and reflex measurements were made using an ankle ergom- eter. Jumping tests and ankle ergometer tests were car- ried out before, immediately after, 2 h (2H), 2 days and 7 days (7D) after…

Analysis of the OSU-MASLWR-003A natural circulation test by using the trace code

2012

Aerodynamics of Ski Jumping

2016

Ski jumping is an exciting and primarily competitive sport involving both ballistic and aerodynamic factors. The ballistic factors are release velocity and release position of a ski jumper from the take-off table, whereas aerodynamic factors include the gliding properties of the jumper/ski system (velocity, suit design, surface area, posture of the jumper/ski system, resisting and lifting forces). Both ballistic and aerodynamic factors place special demands on the jumper so that he/she can, for example, optimally maximize the vertical lift and minimize the drag forces. Ski jumping has attracted spectators 200 years and it has undergone several notable steps in the development of performance…

Aspetti tipo-cronologici e archeometrici delle ceramiche africane nel territorio di Cignana (Naro, AG, Sicilia)

2020

Il progetto di ricerca, condotto in cotutela tra l'Università di Palermo e Aix-Marseille Université, si basa sullo studio delle ceramiche africane importate in Sicilia tra la fine del I e il VII secolo d.C.. La ricerca si basa sui frammenti - tutte le classi incluse - raccolti dal gruppo di ricerca di Palermo durante le ricognizioni archeologiche nei dintorni della villa romana di Cignana (Agrigento) e nell'entroterra di Termini Imerese (Palermo). L'approccio multidisciplinare archeologico ed archeometrico, condotto in collaborazione con diversi specialisti di queste discipline, ha permesso di definire l'origine delle diverse produzioni e di riflettere sulla loro circolazione in Sicilia, in…

Maintenance Operation on AGN-201 “COSTANZA” Nuclear Research Reactor of Palermo University

2015

During operations with AGN-201 “COSTANZA” nuclear research reactor of Palermo University a failure of a compensated boron-lined ionization chamber provided with a measurement channel was highlighted. A maintenance program aimed to verify the operative conditions of all measurement systems was then started. It was easy to identify as cause of the malfunction a seepage of water inside the container of a Westinghouse WL 6377 ion chamber due to a lack of watertight closure. This can be attributed to corrosion of the container due to parasitic currents circulating between the container, the chamber and the reactor tank that acts as electrical ground of the system. In this work we refer over main…

Modelling terror management theory: computer simulations of the impact of mortality salience on religiosity

2017

ABSTRACTThis article outlines the development – and reports on the experimental findings – of two computational models designed to simulate the dynamic systems and behavioural patterns identified and clarified by research on terror management theory. The causal architectures of these models are informed by empirical research on the effects of mortality salience on “religiosity” (and vice versa). They are also informed by research on the way in which perception of personal and environmental hazards activate evolved cognitive and coalitional precautionary systems that can intensify anxiety-alleviating behaviours such as imaginative engagement with supernatural agents postulated within a relig…

Evaluation of aging behavior under salt-fog spray conditions of green sandwich structures

2018

In this paper, the aging resistance of sandwich structures made with cork agglomerate as core and flax-reinforced polymeric laminates as face sheets was investigated for the first time. In order to evaluate their durability in a hostile environment, a sandwich plate was manufactured by vacuum bagging technique and aged under salt-fog spray conditions, according to ASTM B 117 standard. The evolution of the sandwich mechanical properties during the aging exposition was analyzed by carrying out quasi-static flexural tests and Charpy impact tests both on unaged specimens and on specimens aged for 10, 25, and 60 days, respectively. The quasi-static experimental results showed that despite the sa…

Entre forme d'habitat groupé et forme d'habitat dispersé : le cas intermédiaire d'une occupation rurale aux IIIe et IVe siècles ap. J.-C. entre Fragn…

2011

A diagnosis made in 2008 on a zone measuring 98 ha north-east of Chalon-sur-Saône has revealed a lane, a small funerary zone and four occupied areas incorporating buildings used for domestic and agricultural (barn) purposes used during the last two thirds of the 3rd century and the first half of the 4th century ad. The linear distribution of the remains over a distance of 1300 metres has stimulated lively interest and poses several questions regarding the exact nature of the occupation. One of the hypotheses put forward is that of a small agglomeration associated with a possible estate. Analysis relies on studies of ceramic and metallic objects and examination of sets of coins

Entre forme d’habitat groupé et forme d’habitat dispersé : le cas intermédiaire d’une occupation rurale aux IIIe-IVe siècles ap. J.C entre Fragnes et…

2008

International audience; Un diagnostic réalisé en 2008 sur une emprise de 98 ha, au nord-est de Chalon-sur-Saône, a mis au jour une voie, une petite zone funéraire, ainsi que quatre aires d’occupation témoignant de la présence de bâtiments à vocation domestique et agricole (grange) occupés des deux derniers tiers du IIIe siècle au milieu du IVe siècle ap. J.-C. La distribution linéaire des vestiges sur une longueur de 1 300 m suscite un vif intérêt et pose plusieurs questions quant à la nature exacte de l’occupation. L’identification d’une petite agglomération associée à un éventuel domaine foncier fait partie des hypothèses retenues. L’analyse s’appuie sur les études du mobilier céramique e…