ANALYSIS OF HUMAN MOTION WITH METHODS FROM MACHINE LEARNING

Usually, predefined kinematic parameters are investigated in biomechanical studies of human motion. In recent years, techniques of machine learning have been added to this field of research (Chau, 2001). In this study different dimension reduction methods like Principal Component Analysis (PCA) and Fourier Transformation (FT) are investigated as an alternative to common biomechanical approaches in motion analysis

Effects of Juvenile Idiopathic Arthritis on Kinematics and Kinetics of the Lower Extremities Call for Consequences in Physical Activities Recommendations

Juvenile idiopathic arthritis (JIA) patients (n = 36) with symmetrical polyarticular joint involvement of the lower extremities and healthy controls (n = 20) were compared concerning differences in kinematic, kinetic, and spatio-temporal parameters with 3D gait analysis. The aims of this study were to quantify the differences in gait between JIA patients and healthy controls and to provide data for more detailed sport activities recommendations. JIA-patients showed reduced walking speed and step length, strongly anterior tilted pelvis, reduced maximum hip extension, reduced knee extension during single support phase and reduced plantar flexion in push off. Additionally the roll-off procedure of the foot was slightly decelerated. The reduced push off motion in the ankle was confirmed by lower peaks in ankle moment and power. The gait of JIA-patients can be explained as a crouch-like gait with hyperflexion in hip and knee joints and less plantar flexion in the ankle. A preventive mobility workout would be recommendable to reduce these restrictions in the future. Advisable are sports with emphasis on extension in hip, knee, and ankle plantar flexion

The youth movement Nashi: contentious politics, civil society, and party politics

The youth movement Nashi was established in Russia with the support of the Putin regime in 2005. The success of anti-regime demonstrators in Ukraine's ‘Orange Revolution’ in 2004 had been noted in Moscow, and Nashi's role was to serve as a pro-regime force to be mobilised against the opposition. Its focus was the contentious politics of the street. Nashi represents an interesting theoretical case from the perspective of contentious politics and its relationship with civil society and formal party politics. Nashi's role has developed to include facilitating young people's engagement with party politics and business. Its early centralised control has been ameliorated somewhat by a reorganisation focused on local action. Nonetheless, Nashi exists with state support. Its continued role in contentious politics in support of the Putin regime, for example, countering opposition demonstrations in Moscow in December 2011, makes its identification as a component of democratic civil society problematic

Global alliance for the promotion of physical activity : the Hamburg declaration

Non-communicable diseases (NCDs), including coronary heart disease, stroke, hypertension, type 2 diabetes, dementia, depression and cancers, are on the rise worldwide and are often associated with a lack of physical activity (PA). Globally, the levels of PA among individuals are below WHO recommendations. A lack of PA can increase morbidity and mortality, worsen the quality of life and increase the economic burden on individuals and society. In response to this trend, numerous organisations came together under one umbrella in Hamburg, Germany, in April 2021 and signed the ‘Hamburg Declaration’. This represented an international commitment to take all necessary actions to increase PA and improve the health of individuals to entire communities. Individuals and organisations are working together as the ‘Global Alliance for the Promotion of Physical Activity’ to drive long-term individual and population-wide behaviour change by collaborating with all stakeholders in the community: active hospitals, physical activity specialists, community services and healthcare providers, all achieving sustainable health goals for their patients/clients. The ‘Hamburg Declaration’ calls on national and international policymakers to take concrete action to promote daily PA and exercise at a population level and in healthcare settings.https://drc.bmj.com/am2024Sports MedicineSDG-03:Good heatlh and well-beingSDG-17:Partnerships for the goal

Rapport IV.7. Etude économique de la protection des Vals de Loire par barrages-écrêteurs de crues

Longitudinal dykes protecting the ‘ Vals de Loire ’ against flooding are liable to submersion by very high floods, breaching of the dykes, or weir operation. The economic feasibility of storage dams as a means of improving the protection system is studied, considering each of the following points in turn : (i) Estimated damage caused by various floods. (ii) The reduction in damage due to flood attenuation by an assumed ‘ ideal ’ dam at the confluence of the rivers Loire and Allier. (iii) The effects of potential dams in terms of catchment area size, position with respect to the river confluence, etc., compared to (ii) above. (iv) Construction costs compared to the reduction in flood damage. Only three sites are considered economically feasible, and the optimum storage capacity of each is determined.Les vals de Loire sont protégés des inondations par des digues longitudinales, mais peuvent être submergés lors des très grandes crues, soit par rupture de ces digues, soit par le jeu des déversoirs aménagés. L’étude porte sur les conditions de rentabilité d’une amélioration du système de défense par construction de barrages réservoirs. Elle traite successivement : — d’une évaluation des dégâts créés par différentes crues, — de la diminution de ces dégâts du fait de l’écrêtement des crues par un barrage idéal édifié au confluent de la Loire et de l’Ailier, — de l’effet des barrages possibles comparés à ce barrage idéal, compte tenu de l’importance de leur bassin d’alimentation, de leur situation par rapport au confluent, etc., — de la comparaison des coûts de construction avec la diminution des dégâts. Elle démontre que seuls 3 sites de barrages sont rentables et détermine pour chacun la capacité optimale.Funel P., Schwirtz M. Rapport IV.7. Etude économique de la protection des Vals de Loire par barrages-écrêteurs de crues. In: La prévision des crues et la protection contre les inondations. Dixièmes journées de l'hydraulique. Paris, 5, 6 et 7 juin 1968. Tome 4, 1969

ANALYSIS OF HUMAN MOTION WITH METHODS FROM MACHINE LEARNING

biomechanical studies of human motion. In recent years, techniques of machine learning have been added to this field of research (Chau, 2001). In this study different dimension reduction methods like Principal Component Analysis (PCA) and Fourier Transformation (FT) are investigated as an alternative to common biomechanical approaches in motion analysis