485 Naive T cells race around lymph nodes in search of their specific antigens but, according to a study on page < A r t R e f v o l = " 2 0 3 " I s s = " 3 " > < A r t R e f v o l = " 2 0 3 " I s s = " 3 " > 619< / A r t R e f > < / A r t R e f > , natural killer (NK) cells are in less of a hurry. Bajénoff and colleagues provide the first glimpse of NK cells in live lymph nodes, revealing slow...

In this paper we consider the fair division of chores (tasks that need to be performed by agents, with negative utility for them), and study the loss in social welfare due to fairness. Previous work has been done on this so-called price of fairness, concerning fair division of cakes and chores with non-connected pieces and of cakes with connected pieces. We provide tight or nearly tight bounds ...