Editorial: Natural and artificial radionuclides as tracers of ocean processes

A comparison of the dose from natural radionuclides and artificial radionuclides after the Fukushima nuclear accident

Due to the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, the evacuees from Namie Town still cannot reside in the town, and some continue to live in temporary housing units. In this study, the radon activity concentrations were measured at temporary housing facilities, apartments and detached houses in Fukushima Prefecture in order to estimate the annual internal exposure dose of resid...

Editorial: Agency in Natural and Artificial Systems

The 1980s and 1990s saw a reorientation of the field of artificial intelligence (AI) away from disembodied software, a domain where AI research continues predominantly as software engineering, and toward situated and embodied robotics. Crucially, the publication of Braitenberg's (1984) Vehicles and, later on, the behavior-based robotics movement (e.g., Brooks, 1995) catalyzed this emphasis on a...

Observations of CFCs and SF6 as ocean tracers.

An advantage of using chlorofluorocarbons (CFCs) and sulfur hexafluoride (SF6) as tracers of ocean circulation is that the time-dependent source functions permit calculation of rates for ocean processes. These compounds are also sensitive indicators highlighting interior ocean regions where surface-derived anomalies can be transported on timescales of decades. Significant applications for CFCs ...

Natural Radionuclides in Seafood

Artificial Radionuclides in Marine Organisms in the Northeast Pacific Ocean off Oregon, U. S. A

Marine organisms modify the distribution of radioisotopes in the oceanic ecosystem. Various vital processes of plants and animals concentrate elements. The distributions of the biota are often independent of their watery environment; they may actively migrate vertically or horizontally or may remain in place while the water moves past them. In the case of plankton, the concentrating organisms p...