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Remaining committed to a joint goal in the face of many entic-ing alternatives is challenging. Doing so while cooperatingwith others under uncertainty is even more so. Despite this,agents can successfully and robustly use bootstrapping to con-verge on a joint intention from randomness under the ImaginedWe framework. We demonstrate the power of this model in areal-time cooperative hunting task. Additionally, we run a suiteof model experiments to answer some of the potential chal-lenges to converging that this model could face under imperfectconditions. Specifically, we ask what happens when (1) thereare increasingly many equivalent choices? (2) I only have anapproximate model of you? and (3) my perception is noisy? Weshow through a set of model experiments that this frameworkis robust to all three of these manipulations.

Haematopoiesis is an essential process in early vertebrate development that occurs in different distinct spatial locations in the embryo that shift over time. These different sites have distinct functions: in some anatomical locations specific hematopoietic stem and progenitor cells (HSPCs) are generated de novo. In others, HSPCs expand. HSPCs differentiate and renew in other locations, ensuring homeostatic maintenance. These niches primarily control haematopoiesis through a combination of cell-to-cell signalling and cytokine secretion that elicit unique biological effects in progenitors. To understand the molecular signals generated by these niches, we report the generation of caudal hematopoietic embryonic stromal tissue (CHEST) cells from 72-hours post fertilization (hpf) caudal hematopoietic tissue (CHT), the site of embryonic HSPC expansion in fish. CHEST cells are a primary cell line with perivascular endothelial properties that expand hematopoietic cells in vitro. Morphological and transcript analysis of these cultures indicates lymphoid, myeloid, and erythroid differentiation, indicating that CHEST cells are a useful tool for identifying molecular signals critical for HSPC proliferation and differentiation in the zebrafish. These findings permit comparison with other temporally and spatially distinct haematopoietic-supportive zebrafish niches, as well as with mammalian haematopoietic-supportive cells to further the understanding of the evolution of the vertebrate hematopoietic system.

A Nobel laureate of literature discusses his felling that the history of Latin America reveals the political violence, death of the innocents, torture, looting and quitting of the people to other countries, but still the inhabitants of the continent are responding to the happenings of life. War has broken out five times, there have been seven military coups and millions of people had fled from the continent. The most unfortunate countries of Central America are El Salvador, Guatemala and Nicaragua.