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Spare Capacity (spare + capacity)

Distribution by Scientific Domains

Business, Economics, Finance and Accounting	50%

Selected Abstracts

Capacity provisioning and failure recovery for Low Earth Orbit satellite constellation

INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING, Issue 3 2003
Jun Sun
This paper considers the link capacity requirement for an LEO satellite constellation. We model the constellation as an N×N mesh-torus topology under a uniform all-to-all traffic model. Both primary capacity and spare capacity for recovering from a link or node failure are examined. In both cases, we use a method of ,cuts on a graph' to obtain lower bounds on capacity requirements and subsequently find algorithms for routing and failure recovery that meet these bounds. Finally, we quantify the benefits of path-based restoration over that of link-based restoration; specifically, we find that the spare capacity requirement for a link-based restoration scheme is nearly N times that for a path-based scheme. Copyright © 2003 John Wiley & Sons, Ltd. [source]

Designing safety space in a supply chain to handle system-wide disruptions

NAVAL RESEARCH LOGISTICS: AN INTERNATIONAL JOURNAL, Issue 3 2007
Murthy Mudrageda
Abstract In some supply chains serious disruptions are system wide. This happens during periods of severe weather, as when storms cause shuttle tankers serving oil platforms in the North Sea to stop movements of crude oil, barges are frozen in the Mississippi, or all airplanes are grounded after a blizzard. Other notable instances of system-wide disruption happened after the attack on the World Trade Center when all aircraft were grounded and the natural gas and crude-oil pipelines were tangled by hurricanes in 2005. We model a situation where shutting down supply facilities is very difficult and expensive because of excessive inventory buildup from an inability to move out the production. We present a planning model that balances the cost of spare capacity versus shutting down production when planning for disruptions. The model uses an assignment model embedded in a simulation. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007 [source]

Does OPEC have enough spare capacity?

OIL AND ENERGY TRENDS, Issue 5 2005
Article first published online: 18 MAY 200
As world oil demand continues to rise strongly, OPEC is raising its own output accordingly. At present, markets seem to be adequately supplied and crude oil stocks show signs of increasing in the US and other major markets. Most OPEC countries, however, are now producing close to their physical limits and there are increasing worries that if demand goes on growing at its present rate there will be scarcely any spare output capacity available outside Saudi Arabia. [source]

Econometric modelling for short-term oil price forecasting

OPEC ENERGY REVIEW, Issue 1 2010
Antonio Merino
There is a lot of interest in forecasting oil price and in analysing which variables most affect price movements, especially whether non-fundamental variables such as financial activity have any systematic impact on oil price. In this paper we approach both questions by constructing a congruent econometric model with financial and fundamental variables and by analysing the relative weight of the variables in explaining the oil price forecast. After testing for different variables we find that the most accurate forecast from a monthly econometric vector model on oil price is obtained when non-commercial long positions, petroleum stocks and spare capacity are included as explanatory variables. The incorporation of non-commercial long positions clearly improves the accuracy of the prediction. The vector model is specified to include empirical cointegration relationship, which provides an approximation on the long-run restriction postulated by economic theory. [source]