We report on methods for widening modulation bandwidths of commercial laser diode drivers Inexpensive commercial laser diode drivers have many important characteristics but unfortunately their modulation bandwidths are often restricted to below kHz Here techniques involving p channel and n channel JFETs have been tested to enhance the modulation bandwidth of drivers suitable for common laser an...

OBJECTIVE To determine whether there is an association between use of substances that contain caffeine and the risk of crash in long distance commercial vehicle drivers. DESIGN Case-control study. SETTING New South Wales (NSW) and Western Australia (WA), Australia. PARTICIPANTS 530 long distance drivers of commercial vehicles who were recently involved in a crash attended by police (cases...

OBJECTIVE The authors assessed the relationship between traffic accidents and drowsiness. MATERIAL AND METHOD A self-answered questionnaire survey of 4331 commercial bus/truck drivers was done. RESULT Sixty-nine percent of the drivers reported accidents and one third of these accidents was attributable to drowsiness. Drowsy driving and microsleeps were experienced by 75% and 28% of drivers ...

This study assessed the visual profile of motor vehicle drivers in Owerri, Nigeria and to analyse the relationship between the various aspects of visual function in relation to road safety. A cross-sectional descriptive study of 150 commercial vehicles drivers and 130 private vehicles drivers was conducted between November 2005 and February 2006. Data were obtained using structured interviewer ...

This study assesses a possible independent effect of sleep-related breathing disorders on traffic accidents in long-haul commercial truck drivers. The study design included integrated analysis of recordings of sleep-related breathing disorders, self-reported automotive and company-recorded automotive accidents. A cross-sectional population of 90 commercial long-haul truck drivers 20-64 years of...

conclusions the prevalence of diabetes is considerable in drivers and is poorly controlled. educations during the annual check-ups are helpful in reducing glucose levels and further complications. background diabetes complications such as retinopathy and diabetic foot are more important in drivers compared to general population. objectives this study was designed to determine the prevalence of ...

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