System Identification of Bipedal Locomotion in Robots and Humans

The ability to perform a healthy walking gait can be altered in numerous cases due to gait disorder related pathologies. The latter could lead to partial or complete mobility loss, which affects the patients’ quality of life. Wearable exoskeletons and active prosthetics have been considered as a key component to remedy this mobility loss. The control of such devices knows numerous challenges that are yet to be addressed. As opposed to fixed trajectories control, real-time adaptive reference generation control is likely to provide the wearer with more intent control over the powered device. We propose a novel gait pattern generator for the control of such devices, taking advantage of the inter-joint coordination in the human gait. Our proposed method puts the user in the control loop as it maps the motion of healthy limbs to that of the affected one. To design such control strategy, it is critical to understand the dynamics behind bipedal walking. We begin by studying the simple compass gait walker. We examine the well-known Virtual Constraints method of controlling bipedal robots in the image of the compass gait. In addition, we provide both the mechanical and control design of an affordable research platform for bipedal dynamic walking. We then extend the concept of virtual constraints to human locomotion, where we investigate the accuracy of predicting lower limb joints angular position and velocity from the motion of the other limbs. Data from nine healthy subjects performing specific locomotion tasks were collected and are made available online. A successful prediction of the hip, knee, and ankle joints was achieved in different scenarios. It was also found that the motion of the cane alone has sufficient information to help predict good trajectories for the lower limb in stairs ascent. Better estimates were obtained using additional information from arm joints. We also explored the prediction of knee and ankle trajectories from the motion of the hip joints

A Systematic Review and Meta-Analysis of the Incidence of Injury in Professional Female Soccer

The epidemiology of injury in male professional football is well documented and has been used as a basis to monitor injury trends and implement injury prevention strategies. There are no systematic reviews that have investigated injury incidence in women’s professional football. Therefore, the extent of injury burden in women’s professional football remains unknown. PURPOSE: The primary aim of this study was to calculate an overall incidence rate of injury in senior female professional soccer. The secondary aims were to provide an incidence rate for training and match play. METHODS: PubMed, Discover, EBSCO, Embase and ScienceDirect electronic databases were searched from inception to September 2018. Two reviewers independently assessed study quality using the Strengthening the Reporting of Observational Studies in Epidemiology statement using a 22-item STROBE checklist. Seven prospective studies (n=1137 professional players) were combined in a pooled analysis of injury incidence using a mixed effects model. Heterogeneity was evaluated using the Cochrane Q statistic and I2. RESULTS: The epidemiological incidence proportion over one season was 0.62 (95% CI 0.59 - 0.64). Mean total incidence of injury was 3.15 (95% CI 1.54 - 4.75) injuries per 1000 hours. The mean incidence of injury during match play was 10.72 (95% CI 9.11 - 12.33) and during training was 2.21 (95% CI 0.96 - 3.45). Data analysis found a significant level of heterogeneity (total Incidence, X2 = 16.57 P < 0.05; I2 = 63.8%) and during subsequent sub group analyses in those studies reviewed (match incidence, X2 = 76.4 (d.f. = 7), P <0.05; I2 = 90.8%, training incidence, X2 = 16.97 (d.f. = 7), P < 0.05; I2 = 58.8%). Appraisal of the study methodologies revealed inconsistency in the use of injury terminology, data collection procedures and calculation of exposure by researchers. Such inconsistencies likely contribute to the large variance in the incidence and prevalence of injury reported. CONCLUSIONS: The estimated risk of sustaining at least one injury over one football season is 62%. Continued reporting of heterogeneous results in population samples limits meaningful comparison of studies. Standardising the criteria used to attribute injury and activity coupled with more accurate methods of calculating exposure will overcome such limitations

Proceedings of the 11th International Conference on Kinanthropology

The 11th International Conference on Kinantropology was held on the Nov 29 – Dec 1, 2017 in Brno and was organized by the Faculty of Sports Studies, Masaryk University and the Faculty of Kinesiology, University of Zagreb. This year was divided into several themes: sports medicine, sport and social science, sport training, healthy lifestyle and healthy ageing, sports management, analysis of human movement. Part of the conference was also a symposium Atletika and Ortoreha that gathered specialists in physiotherapy

Life Sciences Program Tasks and Bibliography

This document includes information on all peer reviewed projects funded by the Office of Life and Microgravity Sciences and Applications, Life Sciences Division during fiscal year 1995. Additionally, this inaugural edition of the Task Book includes information for FY 1994 programs. This document will be published annually and made available to scientists in the space life sciences field both as a hard copy and as an interactive Internet web pag

Polaris

Emil Bessels was chief scientist and medical officer on George Francis Hall's ill-fated American North Pole Expedition of 1871-73 on board the ship Polaris. Bessels' book, translated from the German in its entirety for the first time, is one of only two first-hand accounts of the voyage, and it is the only first-hand account of the experiences of the group which stayed with the ship after it ran afoul of arctic ice, leaving some of its crew stranded on an ice floe. Bessels and the others spent a second winter on shore in Northwest Greenland, where the drifting, disabled ship ran aground. Hall died suspiciously during the first winter, and Bessels is widely suspected of having poisoned him. Bill Barr has uncovered new evidence of a possible motive. Essential reading for researchers and students of arctic exploration history, this book is also a compelling read for the interested general reader

Polaris

Emil Bessels was chief scientist and medical officer on George Francis Hall's ill-fated American North Pole Expedition of 1871-73 on board the ship Polaris. Bessels' book, translated from the German in its entirety for the first time, is one of only two first-hand accounts of the voyage, and it is the only first-hand account of the experiences of the group which stayed with the ship after it ran afoul of arctic ice, leaving some of its crew stranded on an ice floe. Bessels and the others spent a second winter on shore in Northwest Greenland, where the drifting, disabled ship ran aground. Hall died suspiciously during the first winter, and Bessels is widely suspected of having poisoned him. Bill Barr has uncovered new evidence of a possible motive. Essential reading for researchers and students of arctic exploration history, this book is also a compelling read for the interested general reader

Greening the Maple

Ecocriticism can be described in very general terms as the investigation of the many ways in which culture and the environment are interrelated and conceptualized. Ecocriticism aspires to understand and often to celebrate the natural world, yet it does so indirectly by focusing primarily on written texts. Hailed as one of the most timely and provocative developments in literary and cultural studies of recent decades, it has also been greeted with bewilderment or scepticism by those for whom its aims and methods are unclear. This book seeks to bring into view the development of ecocriticism in the context of Canadian literary studies. Selections include work by Margaret Atwood, Northrop Frye, Sherrill Grace, and Rosemary Sullivan