Suchergebnisse - Friction

Kalliorinne, K., Hindér, G., Sandberg, J., Larsson, R., Holmberg, H.-C., Almqvist, A. “… As in all endurance sports, cross-country skiing requires the use of energy to overcome resistive forces, in this case primarily aerodynamic drag and friction between the skis and snow. Even a slight reduction in either of these can determine the outcome of a race.  …”

Liu, J., Hu, T., Yin, J. “… Overall satisfaction plays a disproportionately important role at the lowest loyalty levels, underscoring the need to reduce onboarding frictions and strengthen perceptions of safety. These findings refine Self-Determination Theory applications in outdoor sport education and highlight that adaptive, segment-aware coaching strategies are essential for promoting retention and sustainable participation in winter sports. …”

Sandberg, J., Hindér, G., Holmberg, H.-C., Almqvist, A., Larsson, R. “… While the mechanisms of friction are discussed, a complete understanding of these mechanisms has not yet been reached. …”

Hindér, G., Sandberg, J., Kalliorinne, K., Holmberg, H.-C., Almqvist, A., Larsson, R. “… This study evaluates the negative effects of grip wax application on the dynamic ski-snow coefficient of friction and subsequent performance during the double poling cycle in cross-country skiing.  …”

Auganæs, S. B. “… A decisive factor for performance in cross-country skiing is the friction between the ski and snow. As a consequence, a lot of effort is put into developing fast skis and glide products.  …”

Skedung, L., Almgren Stenberg, E., Blomberg Saitton, D., Hallstenson, K., Pizzul, L., Bard, S., Sundin, M., Benjamins, J.-W. “… The hypothesis is that more hydrophobic, i.e. more water repellent, ski wax allows better transportation of the water film away from the ski/snow interface, providing lower friction and better glide. The hydrophobicity of ski waxes and ingredients was quantified from contact angle measurements using water and ethylene glycol as the liquid in a climate-controlled room (23°C and 50% relative humidity).  …”

Kalliorinne, K., Sandberg, J., Hind´er, G., Holmberg, H. C., Supej, M., Larsson, R., Almqvist, A. “… Friction …”

Heinen, J. T., Brockie, S. G., ten Broek, R., van der Kruk, E., Moore, J. K. “… We accomplish this with a direct collocation formulation using a null seed initial guess by carefully modeling the discontinuous aspects of board-ground impact and foot-board friction. This leads to efficient and robust solutions that are 10 times more computationally efficient than prior work on similar problems.  …”

Fuss, F. K. “… A glide model served for the assessment of the sensitivity of mass, drag area and coefficient of friction, and for determining how much mass were required to tie with the next higher rank of the first four athletes of each competition.  …”

Scherge, M., List, S., Hollenbacher, J. “… Force differences between left and right skis are accompanied by different frictional forces. As a consequence, the athlete experiences a twist along the vertical body axis, which has a detrimental effect on the propulsive force during double pole skiing.  …”

Mössner, M., Schindelwig, K., Heinrich, D., Hasler, M., Nachbauer, W. “… Modeling of ski friction requires an in-depth understanding of the ski-snow contact.  …”

Gløersen, Ø., Hoel Rindal, O. M., Tjønnås, J. “… Rated "glide" was compared to ski friction coefficient, which was estimated in a downhill segment by considering changes in mechanical energy and estimating air drag.  …”

Guo, S., Love, G., Brown, C. A. “… It is not known what characterizations might be pertinent for characterizing base structures for correlating with friction. It is suggested that recent work on multiscale curvature characterizations for feature shape and anisotropy might be useful as well as multiscale volumetric capacity, like filling scale. …”

Buene, A. F., Auganæs, S. B., Klein-Paste, A. “… Silicones are affordable, low-toxic and hydrophobic compounds which may be useful glide enhancers to reduce ski-snow friction. METHODS: We tested a range of silicone oils with viscosities of 10-100 cSt.  …”

Hjelle, J. “… Friction behaviour in the sport of speed skating has been investigated by use of a tribometer designed at NTNU.  …”

Kalliorinne, K., Sandberg, J., Hindér, G., Larsson, R., Holmberg, H. C., Almqvist, A. “… The resistive forces come partly from the friction, at the tribological interface between the ski and the snow, and as with many tribological processes, the characterisation of its origin plays an important role in determining the frictional properties.  …”

Almqvist, A., Pellegrini, B., Lintzén, N., Emami, N., Homberg, H.-C., Larsson, R. “… Here, we specifically describe what is presently known about ski-snow friction, one of the major resistive forces. Today, elite ski races take place on natural and/or machine-made snow.  …”

Caillaud, B., Gerstmayr, J. “… A structural optimization strategy was presented, involving parametric B-spline representation of the sidecut geometry, finite element modeling of the composite structure deforming against a rigid surface, frictional contact formulation and derivative-free algorithm.  …”

Myklebust, H., Losnegard, T., Hallén, J. “… Methods In a cross-over design, nine well-trained male skiers performed short trials (< 40 s) at constant inclination (8.0°), speed (3.0 m.s-1), and controlled rolling/gliding friction on asphalt (in the fall), on the treadmill (in the fall and winter), and during on-snow skiing (in the winter).  …”

Cigrovski, V. “… Determined differences in the pressure distribution between turns performed on in-line skates and skies most probably come out of different terrains and friction forces which results in different speeds of turns.  …”