The choice of transportation system has an important impact on the production efficiency and economic behavior underground mines. Trackless vehicle gradually become main method in mines because mining companies have realized that can be improved using advanced mechanization automation process. extracted ore is loaded onto trucks by loaders situ, then drive to passes for unloading Trucks load un...

Since the beginning of civilization emergence, people began to use minerals extraction on surface Earth and rock mass transportation. One main tasks mining industry is transportation an increasing amount from quarry, which has caused need increase power carrying capacity dump trucks. Today, we can assume that revolutionary period in creation heavy-duty trucks over. Further improvement designs f...

Scheduling problems in the forest industry have received significant attention in the recent years and have contributed many challenging applications for optimization technologies. This paper proposes a solution method based on constraint programming and mathematical programming for a log-truck scheduling problem. The problem consists of scheduling the transportation of logs between forest area...

background: musculoskeletal disorders represent a substantial cause of morbidity worldwide. the contribution of work to these disorders has been well established by various epidemiological and laboratory-based researches. the aim of this study is to investigate the prevalence and associated factors of musculoskeletal disorders in truck drivers. materials and methods: this cross sectional study ...

Data associated with over 9000 accidents involving large trucks and combination vehicles during a two-year period on freeways in the greater Los Angeles area are analyzed relative to collision factors, accident severity, and incident duration and lane closures. Relationships between type of collision and accident characteristics are explored using log-linear models. The results point to signifi...

OBJECTIVE To analyze the putative effect of type of shift and its interaction with leisure-time physical activity on cardiovascular risk factors in truck drivers. METHODS A cross-sectional study was undertaken on 57 male truck drivers working at a transportation company, of whom 31 worked irregular shifts and 26 worked on the day-shift. Participants recorded their physical activity using the ...

Vehicles for the transportation of straw and hay in loose pressed forms are considered. A scheme a transport vehicle hay, haystack truck, is proposed. The truck consists frame, wheels, trailer device, finger platform, mechanism loweringlifting front part sides, lowering-lifting rear platform. results studies to determine physical mechanical properties necessary rationale parameters presented. d...

In this research, Ride quality of a three-axle truck is investigated to understand its vibration specifications and influence of it on special load. The truck is Benz 2624, and the load is rather sensitive to vibrations. The system is considered for an off-road duty. Hence, the vehicle is modeled as a nineteen-degree of freedom system and its equations of motion are derived by employing Lagrang...

This report explores pathways to reducing transportation based carbon dioxide emissions in the United States. The goal is to analyze the feasibility of reducing the level of transportation based carbon dioxide emissions in 2050 to 50% of the level they were at in 2005. Emissions have been steadily rising over the past century, and if left uncurbed, will have a negative effect on the quality of ...

Hunts Point, a 690-acre peninsula in the South Bronx, New York City, is a hub in the tristate (New York, New Jersey, and Connecticut) freight transportation system. This study was carried out in response to community concerns about potential health effects of exposure to diesel exhaust particulate (DEP). We measured particulate matter < 2.5 microm in aerodynamic diameter (PM(2.5)) and elemental...