Surgery for non-Meckel's small-bowel diverticular perforation: two case reports and a literature review.

Background: Similar to colonic diverticula, small-intestinal diverticula are often asymptomatic, but may cause life-threatening acute complications. Non-Meckel's small-bowel diverticular perforation is rare, and the rate of mortality is high. However, there is currently no consensus regarding its therapeutic management.

Improving the estimation of direct release rates and transport processes from the Fukushima Daiichi Nuclear Power Plant accident using higher-resolution oceanic dispersion model.

A series of accidents at the Fukushima Daiichi Nuclear Power Station (F1NPS), following the 11 March 2011 earthquake and tsunami, resulted in the release of radioactive substances into the ocean. In particular, the release of large amounts of radioactive caesium has damaged the fishing industry, leading to voluntary restrictions on fishing and shipping. Oceanic dispersion simulations based on estimates of the pathways and fluxes of radioactive materials provide useful information for assessing the environmental impacts and formulating measures to mitigate the effects of the accident.

Simulated inventory and distribution of Cs released from multiple sources in the global ocean.

Radioactive cesium (Cs) is distributed in the world's oceans as a result of global fallout from atmospheric nuclear weapons tests, releases from fuel reprocessing plants, and inputs from nuclear power plant accident. In order to detect future radionuclide contamination, it is necessary to establish a baseline global distribution of radionuclides such as Cs and to understand the ocean transport processes that lead to that distribution. In order to aid in the interpretation of the observed database, we have conducted a suite of simulations of the distribution of Cs using a global ocean general circulation model (OGCM).

Impacts of direct release and river discharge on oceanic Cs derived from the Fukushima Dai-ichi Nuclear Power Plant accident.

A series of accidents at the Fukushima Dai-ichi Nuclear Power Plant (1F NPP) following the Great East Japan Earthquake and tsunami of 11 March 2011 resulted in the release of radioactive materials to the ocean. We used the Regional Ocean Model System (ROMS) to simulate the Cs activity in the oceanic area off Fukushima, with the sources of radioactivity being direct release, atmospheric deposition, river discharge, and inflow across the domain boundary. The direct release rate of Cs after the accident until the end of 2016 was estimated by comparing simulated results with measured Cs activities adjacent to the 1F NPP.

Estimate of Fukushima-derived radiocaesium in the North Pacific Ocean in summer 2012.

Distributions of radiocaesium (Cs and Cs) derived from the Tokyo Electric Power Company (TEPCO) Fukushima Dai-ichi Nuclear Power Plant (FNPP1) accident in the North Pacific Ocean in the summer of 2012 were investigated. We have estimated the radiocaesium inventory in the surface layer using the optimal interpolation analysis and the subducted amount into the central mode water (CMW) by using vertical profiles of FNPP1-Cs and mass balance analysis as the first approach. The inventory of the Cs in the surface layer in the North Pacific Ocean in August-December 2012 was estimated at 5.