<Addendum><Book Review>Chimpanzee Culture Wars: Rethinking Human Nature alongside Japanese, European, and American Cultural Primatologists By Nicolas Langlitz

[original article] Pan Africa News 27(2) : 24–25 (2020): http://hdl.handle.net/2433/26116

38. Culture

Part VIII. Behavioral Diversit

Anomalous time correlation in two-dimensional driven diffusive systems

We study the time correlation function of a density field in two-dimensional driven diffusive systems within the framework of fluctuating hydrodynamics. It is found that the time correlation exhibits power-law behavior in an intermediate time regime in the case that the fluctuation-dissipation relation is violated and that the power-law exponent depends on the extent of this violation. We obtain this result by employing a renormalization group method to treat a logarithmic divergence in time.Comment: 6 page

Superconducting SET with tunable electromagnetic environment

We have studied the environmental effect on superconducting single-electron transistors (S-SETs) by biasing S-SETs with arrays of small-capacitance dc SQUIDs, whose effective impedance can be varied in situ. As the zero-bias resistance of the arrays is increased, Coulomb blockade in the S-SET becomes sharper, and the gate-voltage dependence changes from e-periodic to 2e-periodic. The SQUID arrays could be used as on-chip noise filters.Comment: 2 pages, 3 embedded figures, submitted to LT23 proceedings. Error in Fig. 1 has been fixe

Long-term Changes in Age-Sex Groups of the Captors and Developmental Stages of the Prey in the Red Colobus Hunting Behavior by the Chimpanzees of Mahale, Tanzania

We analyzed the long-term changes in the age-sex of chimpanzee captors and the developmental stages (estimated by body size) of the colobus prey. We also analyzed whether any specific male chimpanzees disproportionately contributed to the red colobus hunting over time. The data were obtained from a 46-year observation at Mahale Mountains National Park, Tanzania. In the early stages of this long-term study, only mature and adolescent male chimpanzees hunted red colobus, and these hunts were mostly single-kill episodes. But over time, mature and adolescent female chimpanzees began to participate in red colobus hunts as well, and the number of multiple-kill episodes increased. The developmental stages of the red colobus taken as prey also diversified over time. In particular, the rate of infant prey increased, which suggests that chimpanzees may have developed hunting tactics to counter the antipredator tactics of female colobus that have dependent offspring. Thus, the spread of red colobus hunting appears to have increased the diversity of the age-sex classes of chimpanzees acting as hunters and the range of developmental stages of red colobus taken as prey. No consistent tendency was observed that specific male chimpanzees contributed in red colobus hunting more than others continuously over the years. Nevertheless, male chimpanzees tended to kill the red colobus more frequently when they had the alpha status