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Numerical analysis of ski suits surface roughness effects on aerodynamics during the in-run phase of ski jumping [PDF]
Scientific ReportsThe study employs the shearstress transport (SST) turbulence model within a computational fluid dynamics (CFD) framework to investigate the influence of skijumping suit surface roughness on aerodynamic performance during the in-run phase.
Weitao Zheng, , Lin Hong
exaly +6 more sources
Optimization of ski jumping in-run posture using computational fluid dynamics [PDF]
Scientific ReportsWhile aerodynamic optimization during ski jumping flight phases is well-studied, critical knowledge gaps persist regarding posture-fluid interactions in the in-run phase – particularly the dominance of drag dynamics over lift enhancement for speed ...
Wenhan Liu +3 more
exaly +4 more sources
Mid and long-term ecological impacts of ski run construction on alpine ecosystems [PDF]
Scientific Reports, 2020 The proliferation of ski run construction is a worldwide trend. The machine-grading of slopes involved during ski run construction changes the physical, chemical and biological properties of the soil, having significant long-term ecological impact on the
Elena Barni +2 more
exaly +3 more sources
Impact of ski run construction on atypical channel head development
Science of the Total Environment, 2019 The development of ski infrastructure in mountainous areas has a significant impact on the development of erosion landforms and modification of existing landforms on slopes. The main purpose of our study was to determine the effects of ski run construction and artificial snowmaking on the development of channel heads and drainage lines as well as ...
Jarosław Cebulski +2 more
exaly +5 more sources
Sensors, 2015 This study uses inertial sensors to measure ski jumper kinematics and joint dynamics, which was until now only a part of simulation studies. For subsequent calculation of dynamics in the joints, a link-segment model was developed. The model relies on the
Marko Munih, Munih Marko
exaly +4 more sources
A method of deriving operation-specific ski run classes for avalanche risk management decisions in mechanized skiing [PDF]
Natural Hazards and Earth System Sciences, 2019 An in-depth understanding of the nature of the available terrain and its exposure to avalanche hazard is crucial for making informed risk management decisions when travelling in the backcountry.
R. Sterchi, P. Haegeli
doaj +2 more sources
Kinematic Chains in Ski Jumping In-run Posture [PDF]
Journal of Human Kinetics, 2013 Abstract The concept of kinematic chains has been systematically applied to biological systems since the 1950s. The course of a ski jump can be characterized as a change between closed and open kinematic chains. The purpose of this study was to determine a relationship between adjacent segments within the ski jumper’s body’s kinematic chain during
Zdenek Svoboda +2 more
exaly +4 more sources
Development of operational decision support tools for mechanized ski guiding using avalanche terrain modeling, GPS tracking, and machine learning [PDF]
Natural Hazards and Earth System SciencesSnow avalanches are the primary mountain hazard for mechanized skiing operations. Helicopter and snowcat ski guides are tasked with finding safe terrain to provide guests with enjoyable skiing in a fast-paced and highly dynamic and complex decision ...
J. Sykes +6 more
doaj +2 more sources
Determining physiologic variables for changes in 800-m running and 800-m ski ergometer performance. [PDF]
Eur J Appl PhysiolThis study investigates associations between changes in 800 m time trial performance in running or ski ergometer double poling, and changes in physiologic variables after a seven-week observational period.
Gjerløw LE +6 more
europepmc +2 more sources
LandThe rapid expansion of ski tourism and climate change-induced snow shortages have led to intensified ski run maintenance, including extensive earthworks, artificial snowmaking, and regular snow grooming.
Dawid Piątek, Kazimierz Krzemień
doaj +2 more sources