PRECON S.A. is a manufacturing company devoted to produce prefabricated concrete parts for several industries as railway transportation and agricultural industries. Recently, PRECON S.A. signed a contract with RENFE, the Spanish National Railway Company, to manufacture pre-stressed concrete sleepers for the sidings of the new railways of the high speed train (AVE). The scheduling problem associ...

OBJECTIVE To describe the sleep characteristics and examine the associations among perceived stress, sleep disturbances, depressive symptoms, and physical symptoms among female college students. METHODS A total of 103 students completed a battery of questionnaires. RESULTS The students experienced high stress during the school year. The majority of them slept less than 6 hours during weekda...

Background: Insufficient and poor-quality sleep have significant negative health consequences for university students in China. In this study, we aimed to assess the subjective quality of during normalisation COVID-19 epidemic prevention control China identify key factors affecting their quality. Materials Methods: A cross-sectional survey was conducted among 1326 from Hubei Province, Latent pr...

Billions of sleepers are used on railways around the world today. As importance in transportation sector is increasing, demand for also increasing. Although wooden and steel were rail systems past, today most widely sleeper type reinforced concrete sleepers. Among these sleepers, pre-stressed used, popular that can be produced many countries. The two main production methods ribbed system non-ri...

Sleep problems are often under-diagnosed, but may have a profound impact on work performance. The purpose of this study was to validate the Dutch version of the Occupational Impact of Sleep Questionnaire (OISQ). A total of 555 adults with a regular daytime job completed the OISQ. In addition, they also completed the Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS) and the S...

ABSTRACT Objective: to assess sleep quality in menopausal women and its association with symptoms related this period. Method: is a cross-sectional, analytical correlational study. Sleep was assessed using the Pittsburgh Quality Index; climacteric symptoms, according Menopause Rating Scale. To compare total score each Scale domain PSQI classification, Mann-Whitney U non-parametric test used. P&...

To investigate the influence of different intensities and durations of exercise before bedtime on the sleep pattern and core body temperature of individuals considered good sleepers, we selected 17 healthy males and all underwent 5 nonconsecutive days of study. Measurements of polysomnographic parameters and core body temperature were taken at baseline and after each experimental protocol, perf...

OBJECTIVE To examine the association between total sleep duration and the prevalence of metabolic syndrome (MetSyn) in older Chinese. RESEARCH DESIGN AND METHODS Cross-sectional analysis of baseline data from the Guangzhou Biobank Cohort Study (GBCS) was performed. Participants (n = 29,333) were aged ≥50 years. Risk of MetSyn and its components were identified for self-reported total sleep du...

68 October 2007 EngineerIT This article aims to automate such intuitive human skills for future sleeper inspections. Pattern recognition has been proposed for classification and results from sensors based on the abovementioned methods were fused to generate a single output condition. Final results achieved in this work indicate an overall classification rate of around 88% compared to the human ...