Risk Factors for Collisions and Near-Miss Incidents Caused by Drowsy Bus Drivers.

Serious accidents have been caused by drowsy bus drivers and have necessitated an examination of the risk factors involved. A questionnaire survey among employees of a bus company was conducted in Ibaraki Prefecture, Japan in September 2014. Respondents were asked to report details of their work and life over the preceding month.

Conceptual design for resistive bolometer system with multiple apertures for measurement of total radiated power in JT-60SA.

A field of view (FoV) of the resistive bolometer systems specialized for the total radiated power analysis has been designed with bolometer systems having multiple-apertures in JT-60SA. The multi-aperture bolometer system can reduce the required number of bolometer channels for the determination of the total radiated power. The FoV design has been carried out to minimize unobserved and overlapping regions with the following requirements: (i) independent determination of the divertor and the main plasma radiation, (ii) limitation of the use of only three diagnostic ports, and (iii) a redundant FoV design.

New design techniques of resistive bolometer system for analysis of total radiated power.

Two design techniques for the field of view (FoV) of a resistive bolometer system for the analysis of the total radiated power have been developed. The first technique is a new concept of the resistive bolometer system having multiple apertures to achieve a large viewing angle with one bolometer channel. The second technique is an optimization technique of the bolometer location in the major radial direction to minimize error of the analysis.

[Development process of Evidence-based "Return-to-work Guidance in Occupational Health 2017"].

Objective: "Return-to-work Guidance in Occupational Health 2017 (RTW Guidance 2017) " is the first occupational health guide in Japan that evaluates the quality of evidence and offers recommendations based on results of the systematic review of randomized controlled trials. Details of the systematic review of each review question (RQs) will be described separately. This article presents an overview of the method and process of developing the "RTW Guidance 2017.

Development of bolometric tomography technique for high-contrast radiation distribution in toroidal devices.

An extended Computed Tomography (CT) technique with a priori information based on Phillips-Tikhonov regularization has been developed to handle a high-contrast radiation distribution, which can result in large reconstruction errors in the region where radiation intensity is low, with few line of sight (LOS) data. Reference profiles generated from LOS data for every time slice are employed as the a priori information. In the extended technique, the weighting parameter for the reference profile is automatically determined from the LOS data, to avoid an inappropriate reference.

Conceptual design of imaging bolometer for use of computed tomography in JT-60SA.

An InfraRed imaging Video Bolometer (IRVB) system in JT-60SA has been designed for the two-dimensional (2D) Computed Tomography (CT) analysis of radiation. To achieve complete viewing of the whole poloidal cross section for plasmas having a low aspect ratio, a new IRVB concept, which has two sets of pin-hole camera systems viewing two different directions, has been introduced. Fields of view of the IRVB have been successfully designed by moving apertures to be sufficient for CT use without installation in tangential ports.

Cataracts in airline pilots: prevalence and aeromedical considerations in Japan.

Introduction: Despite modern aviation being increasingly less dependent on human factors, the pilot is still part of the aircraft systems and vision is critical for flight safety. The incidence of cataract increases with age, but as most epidemiological studies focus on senior age groups, there is no data relevant to working age groups.

Purpose: The aim of our study was to elucidate the prevalence of lens opacity in Japanese airline pilots.

Medical status of airline pilots over 60 years of age: Japanese experience, 1991-2007.

Introduction: Since 1991, the Japan Civil Aviation Bureau has allowed pilots over the age of 60 to continue flying for the airlines, subject to regular medical review. To date, we now have almost 18 yr of hands-on experience in the aeromedical assessment of senior pilots. This paper shares some of our findings.

[Situation of the occurrence of unexpected accident].

The situation of the occurrence of an unexpected accident in Japan was outlined. The unexpected accident that cause of one's death statistics and can be put is a baby especially and a high rate. It is important to make the best use of the medical cause investigation for the relapse prevention of the unexpected accident.

A 10-year retrospective review of airline transport pilots aged 60 to 63 in Japan.

Background: On May 14, 1991, the Japanese Ministry of Transport issued an official notice allowing medically certified airline transport pilots aged 60 to 63 yr old (aged pilot) to work on non-scheduled flights. Since September 24, 1996, the official notice was revised to allow them to work on scheduled flights. The regulation requires pilots to pass both routine and additional aviation medical examinations.