Famas-NewCon: A generator program for stacking in the reference case

The FAMAS-Newcon project aims at developing new logistic control structures for a containerterminal capable of handling jumbo container ships within 24 hours. In one of the subprojectsstacking aspects is studied. This report describes a generator model in which on the basis of a global description arrival and departure moments of individual containers are generated for a medium term (15 weeks). The global description consists of a specification of the modal split in terms of containers handled by jumbo's, deepsea, shortsea, rail, barge and trucks, next a specification of the number and type of containers transported by an individual jumbo and deepsea and finally a specification of the dwell time. The output of the generator program is a file with the following container information: arrival and departure times,import/export modality and the import/export ship in case that is a deepsea or jumbo. This file serves as the input of a stacking program which is described in a sequel report. The advantage of this construction is that several stacking strategies can be compared with the same arrival and departures of containers.generator program;stacking;logistic control structures

Equilibrium spherically curved 2D Lennard-Jones systems

To learn about basic aspects of nano-scale spherical molecular shells during their formation, spherically curved two-dimensional N-particle Lennard-Jones systems are simulated, studying curvature evolution paths at zero-temperature. For many N-values (N<800) equilibrium configurations are traced as a function of the curvature radius R. Sharp jumps for tiny changes in R between trajectories with major differences in topological structure correspond to avalanche-like transitions. For a typical case, N=25, equilibrium configurations fall on smooth trajectories in state space which can be traced in the E-R plane. The trajectories show-up with local energy minima, from which growth in N at steady curvature can develop.Comment: 10 pages, 2 figures, to be published in Journal of Chemical Physic

Famas-NewCon: A generator program for stacking in the reference case

The FAMAS-Newcon project aims at developing new logistic control structures for a container terminal capable of handling jumbo container ships within 24 hours. In one of the subprojects stacking aspects is studied. This report describes a generator model in which on the basis of a global description arrival and departure moments of individual containers are generated for a medium term (15 weeks). The global description consists of a specification of the modal split in terms of containers handled by jumbo's, deepsea, shortsea, rail, barge and trucks, next a specification of the number and type of containers transported by an individual jumbo and deepsea and finally a specification of the dwell time. The output of the generator program is a file with the following container information: arrival and departure times, import/export modality and the import/export ship in case that is a deepsea or jumbo. This file serves as the input of a stacking program which is described in a sequel report. The advantage of this construction is that several stacking strategies can be compared with the same arrival and departures of containers

Multicriteria Analysis for Development Planning

A particularly vexing methodological difficulty in the design and evaluation of planning proposals concerns the way in which choices are made. Clearly, the selection of the "best" action from several alternatives, each of which will have different outcomes or consequences, is very subjective. This problem grows in importance if the actions under consideration will ultimately determine the welfare and wellbeing of a region, as is often the case in development planning. Many planning activities in developing countries are concerned with the construction of new infrastructure, rather than the improvement of an existing regime more typical of developed countries. Hence, methods and techniques which facilitate the treatment of choice or classification problems can be of tremendous importance in development planning. One important subset of such tools is that composed of approaches which use a multidimensional set of sometimes conflicting criteria or objectives to structure and solve a choice or classification problem. These are usually called multi-criteria methods. The purpose of this paper is to assess various multicriteria approaches in terms of their potential use in development planning