In this paper, the skew control of the load (container) in the quay crane used in the dockside of a container terminal is investigated. The mathematical model of the 3-dimensional (3D) motions of the load is first derived. The container hooked to a spreader is suspended by four ropes in air. When the container is accelerated by the trolley or is disturbed by winds, it will make a rotational mot...

This paper is composed of a survey on wearable computers and a research agenda to further pursue topics in the communication area. We begin with a brief walk-through of the terminology and examples, followed by motivation originated from two historical trends – enhancing human biological ability and increasing resource accessibility. Then, we investigate the existing technologies and relevant r...

Following the U.S. Clean Air Act Amendments of 1990, electric utilities dramatically increased their utilization of low-sulfur coal from the Powder River Basin (PRB). Recent studies indicate that railroads hauling PRB coal exercise a substantial degree of market power and that relative price changes in the mining and transportation sectors were contributing factors to the observed pattern of in...

This paper aims to review one of the least used, but no less important, approaches in assessment environmental implications electricity generation: Economic Input-Output Life Cycle Assessment (EIO-LCA). methodology is a top-down approach intertwined with satellite accounts provided by national statistical office. Through use economic input-output (IO) tables and industrial sector-level energy d...