In this paper the notion of emergence in complex social systems is rediscussed as a necessary instrument for a theory of the macro-micro link. Referring to Schelling’s model of segregation, emergent effects are defined as effects generated by (inter)acting micro-social entities, and implemented upon, but not incorporated into, their rules. In the successive section, the way back from macro to m...

Compartmentalization of cellular functions relies on partitioning of domains of diverse sizes within the plasma membrane (PM). Macro-domains measure several micrometers and contain specific proteins concentrated to specific sides (apical, basal, and lateral) of the PM conferring a polarity to the cell. Cell polarity is one of the driving forces in tissue and growth patterning. To maintain macro...

Schelling (1969, 1971a,b, 1978) observed that macro-level patterns do not necessarily reflect micro-level intentions, desires or goals. In his classic model on neighborhood segregation which initiated a large and influential literature, individuals with no desire to be segregated from those who belong to other social groups nevertheless wind up clustering with their own type. Most extensions of...

In this paper, the modeling of solidification Al-4Cu alloy was studied. The calculation code is developed to model equiaxed globular in a square mold. mold walls are subjected constant temperatures and velocity components equal 0, exchange coefficient ’H’ between interface melt estimated at 500 W/( m 2 K) initial temperature ’T0’ 900 K. resolution method used finite differences, upwind scheme f...

This paper examines a series of Schelling-like models of residential segregation, in which agents prefer to be in the minority. We demonstrate that as long as agents care about the characteristics of their wider community, they tend to end up in a segregated state. We then investigate the process that causes this, and conclude that the result hinges on the similarity of informational states amo...

Accurate chromosome segregation requires the interaction of chromosomes with the microtubules from the mitotic spindle. This interaction is mediated by the macro-molecular kinetochore complex, which assembles only at the centromeric region of each chromosome. However, how this site is specified and how assembly of the kinetochore structure is regulated in coordination with cell cycle progressio...

Thomas C. Schelling showed that global aggregation may occur, even if it does not correspond to agent preferences; thus, to some extent his model supported the view that segregation is unavoidable, whatever the tolerance is. The segregation landscape approach proposed in this paper is seriously weakening this hypothesis; here, we radically change the perspective and propose using the landscape ...