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We use modern and novel techniques to study the problems associated with detection and analysis of multitudinous seismic events, which form the background for isolated great earthquakes. This new approach involves multivariate analysis of low and large magnitude events recorded in space over a couple of centuries in time. We propose here the deployment of(More)
The effects of performing video display terminal (VDT) tasks with a bright display (BD) at night on nocturnal salivary melatonin concentration, rectal temperature, heart rate, and sleepiness were examined. Seven healthy male adults performed exciting VDT tasks with a BD and a dark display (DD) and boring VDT tasks with a BD and a DD from 2300 to 0200. The(More)
BACKGROUND Many studies have focused on disease causality, but few of them deal with health-promoting factors. Thus, we examined the effect of having a sense of purpose in life (ikigai) on mortality from cardiovascular disease (CVD). METHODS In 1988, we conducted a prospective cohort study of 2,959 Japanese subjects, ranging in age from 40 to 74 years,(More)
Correlations among suicide rate, unemployment rate, and enterprise failure were examined from 1976 to 1994 by using a Loess smoothing method. Significant positive correlations were found between suicide rate in men and unemployment and between suicide rate in both sexes and enterprise failure (p < .001).
Keystroke dynamics-based user authen-tication is recognized as one of potentially valid biometrics. For this research, we asked 51 subjects to input predefined text and collected their keystroke data. For two data, their dissimilarity is measured, with which they are verified to be collected from the same subject or not. In this paper, we show that(More)
BACKGROUND Among life-style factors affecting mental health, dietary habits are becoming a public health concern in their relation to psychological distress and social capital. We examined associations between interest in dietary pattern, social capital, and psychological distress with a population-based cross-sectional study in rural Japan. METHODS A(More)
Previous research has shown an empirical link between tobacco and alcohol use and suicide. If tobacco and alcohol use contribute to suicidal behaviors, then policies designed to reduce the tobacco and alcohol consumption may succeed in reducing suicides as well. To test this hypothesis, correlations for suicide rates with alcohol consumption, taxes on(More)
BACKGROUND Effective and efficient interprofessional collaboration (IPC) is needed between departments in a healthcare setting. Although Japanese physicians are expected to provide leadership in IPC, it has been suggested that their perception of IPC is more negative than among other healthcare professionals. The purpose of this study was to clarify(More)
One approach to investigate earthquake source processes is to produce kinematic source models from inversion of seismic records and geodetic data. The setup of the inversion requires a variety of assumptions and constraints to restrict the range of possible models. Here, we evaluate to what extent physically plausible earthquake scenarios are reliably(More)