Slipping Patella

Metastasis: Slipping Control

‘‘And now here it was again, now grown, now in its new home.’’ In her book Resilience, Elizabeth Edwards recalls what raced through her mind when she learned that her cancer had come back and had metastasized. After surgery, radiation, and chemotherapy, she thought that the cancer ‘‘had been chased away.’’ How does cancer find a new home and become metastatic? The short answer is simple: it is ...

Slipping through the middle

Tugging and pulling in asymmetric cell divisions n asymmetric divisions, the cell alters the normal process that centers the spindle in the mother cell, but how it regulates the timing of spindle movement is unclear. Now, on page 245, Labbé et al. describe a tethering system that resists premature movement of the mitotic spindle during asymmetric cell divisions in C. elegans embryogenesis. It w...

Slipping into trance

It has been hypothesized that highly hypnotizable people spontaneously slip into trance when given imaginative suggestions without prior induction of hypnosis. We tested this in two studies. In Study 1, we examined state reports from ten highly suggestible students following the administration of a suggestion for altered colour perception. The suggestion was administered twice, once with and on...

Stability of Steady Frictional Slipping

Assistant Professor, Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, N.Y. 14850 The shear resistance of slipping surfaces at fixed normal stress is given by r = r( v,state). Here V = slip velocity, dependence on «state" is equivalent to functional dependence with fading memory on prior V(t), and ar( v,state) /iJV>O. We establish linear stability conditions for stead...

Slipping the Bonds of Federalism