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Book
Freight Flows,Logistics Costs, and Efficiency : Optimal Path Analysis.
Author:
Year: 2012 Publisher: Washington, D.C. : The World Bank,

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Abstract

In Central America, cargo is transported almost entirely by road. The movement of imports and exports to and from international seaports is done by truck. Rail service is almost nonexistent and air transport serves less than one percent of the cargo generated within the Central American Common Market (SIECA, 2004). Intra-regional trade is much more important in Central America than it might seem at first glance. The second largest trading partner of Central America is the region itself. In 2010, one quarter of the exports from Central America were destined for final consumption within the region. Half of the exports of Central America (54 percent in 2010) correspond to agricultural products and a large proportion of them supply markets inside the region. Nearly 40 percent of intra-regional exports consist of food, beverages, animals and plants (SIECA, 2011). Perishable food products are transported on trucks, and spatially restricted by the geography and the road infrastructure. In this context, inefficiencies in the supply chain and delays in freight flows lead to economic losses and amplify the negative impact of the distance to the markets on trade. A gravity model of trade showed that the negative effect of distance1 on total intra-regional exports is 77 percent higher in Central America than in the European Union (World Bank, 2010). More precisely, an increase in distance by 1 percent is expected to reduce intra-regional bilateral exports in Central America by 1.65 percent. In terms of volume, the negative effect of distance within the region exceeds the effect in Europe by 50 percent in grains and up to 550 percent in processed food. In the latter case, an increase in distance by 1 percent is expected to reduce intra-regional bilateral exports of processed food in Central America by 2.88 percent.


Book
The handbook of operator fatigue
Author:
ISBN: 1315557363 1317029410 1317029402 1280689927 9786613666864 1409442659 9781409442653 9781317029410 9780754675372 0754675378 9781317029403 9781315557366 9781317029397 1317029399 Year: 2012 Publisher: Farnham Burlington, VT : Ashgate,

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"Fatigue is a recognized problem in many facets of the human enterprise. It is not confined to any one area of activity but enters all situations in which humans have to perform for extended intervals of time. Most problematic are the circumstances in which obligatory action is continuous and the results of failure are evidently serious or even catastrophic. Therefore, the modern media especially highlights fatigue-related failures in industries such as transportation, materials processing and healthcare. It can be, and indeed is, no coincidence that most of the spectacular failures in process control that have resulted in the world's largest industrial accidents have occurred in the small hours of the morning when the circadian rhythm is lowest and operator fatigue itself peaks. While there have been legislative efforts made at state, federal and international levels to regulate working hours of employees, the appropriate implementation of such legislation is still a long way off. The Handbook of Operator Fatigue provides a comprehensive account of the subject to serve as the definitive reference work for researchers, students and practitioners alike. The volume features 30 chapters written by experts from around the world to address each important facet of fatigue, including: the scale of the fatigue problem (Section I), the nature of fatigue (Section II), how to assess fatigue (Section III), the impact of fatigue on health (Section IV), fatigue in the workplace (Section V), the neurological basis of fatigue (VI), sleep disorders (VII), and the design of countermeasures to fatigue (VIII)."--Provided by publisher.

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