Retuning the Radio in Radiobiology

Retuning the misfiring brain.

T he past 20 years have witnessed enormous advances in our understanding of the structure and function of the cerebral cortex. Paramount among these advances is the realization that the detailed structural and functional organization of the cerebral cortex is maintained dynamically throughout life, shaped continually by experience and acutely by central or peripheral injury (1, 2). For example,...

Neocybernetic Emergence: Retuning the Posthuman

...We review the history that has unfolded secondfrom first-order cybernetics, and take exception to some recent accounts that discount the importance of the second-order or neocybernetic line of development. We argue that neocybernetic concepts in the line from von Foerster to Maturana, Varela, and Luhmann challenge not just the rigidities of AI and first-order mechanical and social systems en...

Thresholds in radiobiology.

Thindown in Radiobiology

A new expression for the radial dose distribution, tested against available data, and yielding good agreement with enzyme and virus cross sections, is used to calculate cellular inactivation cross sections from track theory models and parameters. We use a cellular model and radiosensitivity parameters, fitted to HILAC data 15 years ago, to represent mammalian cells irradiated at the UNILAC. The...

Perceptual retuning targets features

Introduction Previous work has shown that listeners systematically “retune” their categorical boundaries when presented with real-word tokens containing an ambiguous segment. There have been multiple previous studies on this lexically-guided retuning (Jesse and McQueen 2011; McQueen et al. 2006; Norris et al. 2003), but most work thus far has assumed that the retuning is at the level of the seg...