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Fukushima, Japan

Fukushima University , abbreviated to Fukudai , is a national university in Japan. The main campus is located in Kanayagawa, Fukushima City, Fukushima Prefecture. Wikipedia.


Yamaguchi K.,Fukushima University
Fukushima journal of medical science | Year: 2011

The Great East Japan Earthquake on March 11th, 2011, severely damaged the Fukushima Daiichi Nuclear Power Plant resulting in the diffusion of many radioactive substances throughout Fukushima prefecture. To examine these substances, we have carried out investigations for several months since immediately after the accident. We revealed that environmental high-level radiation spread northwesterly from the nuclear plant and several areas in Nakadori, the region located in the central part of the prefecture between Hamadori (east part of the prefecture) and Aizu-chihou (west part), was contaminated with mid-level radiation. We also analyzed radionuclides in soil and estimated future radiation levels.The importance of topsoil removal for decontamination has become an obvious countermeasure since many radioactive substances have settled on the surface. In addition, we investigated residential areas and their surroundings to find where high-level doses were likely to be detected for lowering the risk of exposure among residents.When little information was available, the investigations were implemented and the results contributed to both administrative policies and civil life. Source


Yokoo Y.,Fukushima University | Sivapalan M.,University of Illinois at Urbana - Champaign
Hydrology and Earth System Sciences | Year: 2011

In this paper we investigate the climatic and landscape controls on the flow duration curve (FDC) with the use of a physically-based rainfall-runoff model. The FDC is a stochastic representation of the variability of runoff, which arises from the transformation, by the catchment, of within-year variability of precipitation that can itself be characterized by a corresponding duration curve for precipitation (PDC). Numerical simulations are carried out with the rainfall-runoff model under a variety of combinations of climatic inputs (i.e. precipitation, potential evaporation, including their within-year variability) and landscape properties (i.e. soil type and depth). The simulations indicated that the FDC can be disaggregated into two components, with sharply differing characteristics and origins: the FDC for surface (fast) runoff (SFDC) and the FDC for subsurface (slow) runoff (SSFDC), which included base flow in our analysis. SFDC closely tracked PDC and can be approximated with the use of a simple, nonlinear (threshold) filter model. On the other hand, SSFDC tracked the FDC that is constructed from the regime curve (i.e. mean monthly runoff), which can be closely approximated by a linear filter model. Sensitivity analyses were carried out to understand the climate and landscape controls on each component, gaining useful physical insights into their respective shapes. In particular the results suggested that evaporation from dynamic saturated areas, especially in the dry season, can contribute to a sharp dip at the lower tail of the FDCs. Based on these results, we develop a conceptual framework for the reconstruction of FDCs in ungauged basins. This framework partitions the FDC into: (1) a fast flow component, governed by a filtered version of PDC, (2) a slow flow component governed by the regime curve, and (3) a correction to SSFDC to capture the effects of high evapotranspiration (ET) at low flows. © 2011 Author(s). Source


The preconcentration methods are effective approaches to enhance the sensitivity and resolution of various analytical instruments without any mechanical improvement of the machine and the relative detectors. In this review, we focus on unique high-powered preconcentrations and separation systems based on the phase separation that arise a secondaryliquid phase from homogeneous solution by chemical reaction; (it has been dubbed as homogeneous liquid-liquid extraction (HoLLE)). Particularly, HoLLE has been used as linker techniques to combine between various preconcentrations and analytical instruments. Integration of the preconcentrations has been introduced as a cascade type in the preconcentration series. By adding the chemical approach to the systems, it can be applied to not only powerful condensation, but also be a selective separation and isolation technique. © 2013 The Japan Society for Analytical Chemistry. Source


This study distinguishes between the "real area" that was affected by the Tohoku-Pacific Ocean Earthquake and the Fukushima Daiichi nuclear plant explosion in the "administrative district," which is governed by the central, prefectural and city governments. The former area can be defined as "the zone contaminated by radioactive substances in the soil after the Fukushima Daiichi nuclear disaster." The latter describes "the district that is legally governed by a three-layer government comprising a central government bureau, a prefectural self-governing body and the municipality (cities, towns, and villages) that provides public services for citizens." However, the second description of Fukushima seems to overpower the first in a systematic and purposeful manner. The government has sought to avoid comprehensive monitoring and information disclosure of the radioactive contamination because they would like to dismiss concerns regarding radioactive contamination from the nuclear plant accident. As of July 30, 2014, some parts of Fukushima Prefecture remain exposed to high-level radiation that exceeds the standard for radiation-controlled areas (5.2 m Sv per year). Other areas do not suffer any direct damage from the accident. Despite the fact that Fukushima includes both areas, governing bodies have failed to produce a contamination map that incorporates the entire prefecture. They have only disclosed the radioactive pollution measurement results from the centers of the prefecture's cities, towns and villages for the fear of both compensation claims and reputation. Source


Patent
Fujifilm Co., Tohoku University and Fukushima University | Date: 2015-08-31

The present invention provides a pulse wave velocity measurement method and system as well as an imaging device available for everyday use by general users at low cost with measurement accuracy less affected by posture or the like. The present invention simultaneously images different parts of a human body in a non-contact state by a single visible light camera and acquires continuous time series image data. Then, the present invention detects each pulse wave from the image data in the different parts of the human body based on a temporal change in pixel value of the different parts of the human body, and then calculates a pulse wave velocity of the human body based on a time difference between the pulse waves in the different parts of the human body.

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