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Precision measurements are important across all fields of science. In particular, optical phase measurements can be used to measure distance, position, displacement, acceleration, and optical path length. Quantum entanglement enables higher precision than would otherwise be possible. We demonstrated an optical phase measurement with an entangled four-photon(More)
Long working hours have been associated with an increased risk of cardiovascular disease, but its relationship with hypertension remains unclear. The objective of this study is to examine the relationship between overtime and presence of hypertension using data from a large-scale multi-company study in Japan. Participants were 52 365 workers of four(More)
AIMS Few studies have examined the prevalence of diabetes using glycated hemoglobin (HbA1c), a newly recommended diagnostic test. We examined the prevalence of diabetes and pre-diabetes using both HbA1c and fasting plasma glucose (FPG) and their associations with risk factors for type 2 diabetes in a large-scale Japanese working population. METHODS(More)
The ability to filter quantum states is a key capability in quantum information science and technology, in which one-qubit filters, or polarizers, have found wide application. Filtering on the basis of entanglement requires extension to multi-qubit filters with qubit-qubit interactions. We demonstrated an optical entanglement filter that passes a pair of(More)
OBJECTIVES The aim of the present study was to develop standardized cost estimation tools that provide information to employers about occupational safety and health (OSH) activities for effective and efficient decision making in Japanese companies. METHODS We interviewed OSH staff members including full-time professional occupational physicians to list(More)
OBJECTIVES This study aimed to identify the practical abilities required by nonspecialist occupational physicians and specify the priorities for training programs. METHODS A practical abilities list was developed through a focus group meeting of specialists. We created a survey questionnaire and asked three groups, namely, occupational physicians,(More)
The purpose of this study was to identify what motivates employers to promote good occupational health and safety practices in small-scale enterprises. Previous studies have shown that small-scale enterprises generally pay insufficient attention to issues of occupational health and safety. These findings were mainly derived from questionnaire based surveys.(More)
OBJECTIVES The aim of this study was to study the necessary competencies for specialist occupational physicians in Japan and the effective training methods for acquiring them. METHODS A competency list (61 items) was developed for the questionnaires in the study by making use of existing competency lists from the Japan Society for Occupational Health(More)
OBJECTIVES We developed a standardized cost estimation method for occupational health (OH) services. The purpose of this study was to set reference OH services costs and to conduct OH services cost management assessments in two workplaces by comparing actual OH services costs with the reference costs. METHODS Data were obtained from retrospective analyses(More)