http://prl.aps.org/abstract/PRL/v108/i9/e098301

 

Suvendu Mandal1,2, Markus Gross1, Dierk Raabe2, and Fathollah Varnik1,2,*
1Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universit?t Bochum, Stiepeler Strasse 129, 44801 Bochum, Germany
2Max-Planck Institut f?r Eisenforschung, Max-Planck Strasse 1, 40237 D?sseldorf, Germany

 

1There is growing evidence that the flow of driven amorphous solids is not homogeneous, even if the macroscopic stress is constant across the system. 2Via event-driven molecular dynamics simulations of a hard sphere glass, we provide the first direct evidence for a correlation between the fluctuations of the local volume fraction and the fluctuations of the local shear rate. 3Higher shear rates do preferentially occur at regions of lower density and vice versa. 4The temporal behavior of fluctuations is governed by a characteristic time scale, which, when measured in units of strain, is independent of shear rate in the investigated range. 5Interestingly, the correlation volume is also roughly constant for the same range of shear rates. 6A possible connection between these two observations is discussed

 

1번 문장은 introduction/motivation이고 2번 문장이 핵심이네요. 3번 문장은 구체적인 결과, 4번째 문장은 결과로부터 얻은 핵심 변수. 5번 문장은 흥미로운 observation이지만 왜 그런지는 아직 모르는거고., 6번 문장은 좀 애매... two observation이 2번 문장의 local volume fraction과 local shear rate을 얘기하는거 같은데... 특별한 결론을 내리지는 못하고 말 그대로 discussion을 한거 같네요. 아마 기존 (실험)결과와 자신들의 계산 결과를 비교하지 않았을까 싶어요.

 

이 논문은, heterogeneity에 대해서 자신있는 결론을 내리지는 못한 거 같네요. 그렇지만, 요즘 한창 떠오르는 이슈에 발빠르게 움직여서 새로운 결과를 얻었고, 그걸 논리적으로 펼쳐낸 것이 이 논문의 contribution인 것 같습니다.