An oil producer needs to sell its oil. They may use futures contracts to lock in a price they will sell at, and then deliver the oil to the buyerwhen the futures contract expires. Similarly, a manufacturing company may need oil for making widgets. Since they like to plan ahead and alway...
ANALYSIS OF CONTACT STRESSES OF WHEEL AND RAIL WITH TWO TYPES OF PROFILES The rolling contact theory of three-dimensional elastic bodies with non-Hertz form is utilized to determine the normal pressure and tangential traction on ... X Jin - 《Chinese Journal of Mechanical Engineering》 被引量:...
Promiscuity and the Evolution of Sexual Transmitted Diseases We study the homosexual and the heterosexual case as well.doi:10.1016/S0378-4371(03)00429-1Sebastian GoncalvesMarcelo Kuperman S Goncalves,M Kuperman,MFDC Gomes - 《Physica A Statistical Mechanics & Its Applications》 被引量: 8发表: 2003...
its neighbor spins. The stochastic dynamics of spin flips give insights into the dynamical heterogeneity of the glass transition8. Another example is the voter model9describing consensus formation, where voters located on a network choose the opinion based on their neighbors and can form ...
A rock mass is actually a complex system composed of intact rocks and numerous discontinuities. Its strength is a synergistic reflection of the two types of links and is determined by the weakest one. The weak link hypothesis acts as the ideological basis in SMRM in estimation of the strength...
Peroxisome proliferator-activated receptor α (PPARα) has various physiological functions such as lipid and glucose metabolism, inflammation and fibrosis in living organisms. Many types of ligand molecules such as phthalate and adipate esters control these physiological functions. In the present study, ...
This is because the user can carry print media around, start and stop reading at her leisure, and so forth. In contrast, broadcast television is not as good at communicating complex, nuanced messages because its structure is different, for example, the user is more likely to consume it in ...
Quantum mechanicsis a tremendously successful theory playing a central role in natural sciences even beyondphysics, and has been verified in countless experiments, some of which were carried out with very highprecision. Despite its great success and its history reaching back more than hundred years,...
Erosion can significantly increase the destructive power of a landslide by amplifying its volume, mobility and impact force. The threat posed by an erosive landslide is linked to its mobility. No mechanical condition has yet been presented for when, how