AIMS To determine the effects of break duration and time of break onset on the amount of sleep that locomotive engineers obtain between consecutive work periods. METHODS A total of 253 locomotive engineers (249 male, 4 female, mean age 39.7 years) participated. Data were collected at 14 rail depots, where participants drove electric or diesel locomotives; worked with another engineer or drove...

The locomotive scheduling problem (or the locomotive assignment problem) is to assign a consist (a set of locomotives) to each train in a pre-planned train schedule so as to provide them sufficient power to pull them from their origins to their destinations. Locomotive scheduling problems are among the most important problems in railroad scheduling. In this paper, we report the results of a stu...

anxiety symptoms have been reported to be present in many patients with diabetes mellitus. however, little is known about the effects of hyperglycemia in critical periods of the central nervous system development. we assessed locomotive, exploratory, and anxiety behaviors in adult rats that remained from infantile repeated hyperglycemia by the open field and elevated plus maze tests. our findin...

Abstract The traction motor is the power source of locomotive. If surface waviness occurs on races bearing, it will cause abnormal vibration and noise, accelerate fatigue wear, seriously affect stability safety transmission. In this paper, an excitation model coupling time-varying displacement contact stiffness excitations adopted to investigate effect bearing under from locomotive-track couple...

In 2009, the average lifespan of a Japanese male was 79.6 years and that of a female was 86.4 years. This was the highest in the world; about 60 years ago, the average in the Japanese population was approximately 50 years. It is thus apparent that Japan has rapidly been becoming an aged society. In 2010 there were 29,440,000 individuals age 65 or older; this number will increase steadily, and i...