نتایج جستجو برای: mine haul road
تعداد نتایج: 96568 فیلتر نتایج به سال:
Birds do it, fish do it and even some insects do it: seasonal, continent-scale migrations. Mammals appear much less adapted to move over such great distances, although whales undertake substantial annual journeys. Now new research suggests that the humpback whale of the Eastern Pacific travels further than any previously documented mammal — moving up and down the south-east Pacific. Researchers...
In the Korean express delivery service market, many companies have been striving to extend their own market share and interested in collaboration through sharing resources such as line-haul vehicles and service centers. Collaboration has recently attracted a great deal of attention as an effective way to secure competitive advantage for companies with limited resources. Some companies operate l...
Abstract Electrifying road-based long-haul transportation is an intricate task. Given the current state of battery technology, either driving ranges electric commercial vehicles (ECVs) are too short or high-capacity batteries costly and so heavy that payloads limited. An old, yet recently revitalized, charging infrastructure currently evaluated on multiple test tracks around globe alternatively...
Return-to-zero differential phase shift keying (RZ-DPSK) is a promising modulation format for the long-haul large capacity optical fibre transmission system, and it demonstrated a superior performance compared to the conventional intensity-modulation direct-detection (IM-DD) system experimentally (Cai et al., 2006; Inoue et al., 2004; Rasmussen et al., 2004). For the IM-DD based long-haul syste...
The constantly increasing loads of vehicles predetermine the search for ways to improve both design methods, technological processes and quality road construction materials. volumes open-pit coal mining require finding haul roads mines. Thus, a qualitatively new approach is needed determine strength performance coarse-grained media. In this work, it proposed granular media by oblique shear meth...
Long-haul truck drivers in the United States experience elevated cardiovascular health risks, possibly due to hypercholesterolemia. The current study has two objectives: 1) to generate a cholesterol profile for U.S. long-haul truck drivers; and 2) to determine the influence of work organization characteristics and sleep quality and duration on cholesterol levels of long-haul truck drivers. Surv...
Long-haul heavy-duty vehicles, including trucks and coaches, contribute to a substantial portion of the modern-day European carbon footprint pose major challenge in emissions reduction due their energy-intensive usage. Depending on hydrogen fuel source, use cell electric vehicles (FCEV) for long-haul applications has shown significant potential reducing road freight CO2 until possible maturity ...
BACKGROUND Short-haul pilots have largely been neglected in studies of fatigue, sleep loss and circadian disruption created by flight operations, but anecdotal evidence from pilots suggests that with the increasing amount of low-cost air travel, commercial pilots working short-haul operations may be becoming seriously fatigued. AIMS This study attempted to ascertain how much subjective fatigu...
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