Hardness of dislocations, a particular metal's hardness can be controlled. Although seemingly counter-intuitive, as the density of dislocations increases, there are more intersections created and consequently more anchor points. Similarly, as more interstitial atoms are added, more pinning points that impede the movements of dislocations are formed. As a result, the more anchor points added, the harder the material will become. Hardness Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. Some materials (e.g. metals) are harder than others (e.g. plastics, wood). Macroscopic hardness is generally characterized by strong intermolecular bonds, but
Carlo Janka won the gold medal in giant slalom and the bronze in downhill at the 2009 World Championships in Val d'Isère. On the weekend of 4–6 December, 2009, Janka achieved a remarkable feat by winning the super-combined, downhill, and giant slalom on the challenging "Birds of Prey" course at Beaver Creek, Colorado. Janka was the first skier to win three World Cup races in a single weekend since Hermann Maier at the same location ten years earlier on the 2000 World Cup tour. On the same weekend as Janka triumphed in Beaver Creek, Lindsey Vonn almost duplicated the feat on the