yard crane is an important resource in container terminals. efficient utilization of the yard crane significantly improves the productivity and the profitability of the container terminal. this paper presents a mixed integer programming model for the yard crane scheduling problem with non- interference constraint that is nphard in nature. in other words, one of the most important constraints in...

the induction machines drives becomes more and more important used in many industrial applications. Their attractiveness is largely due to their simplicity, ruggedness and low cost manufacture, easy maint00enance, high power efficiency and high reliability, are susceptible to various types of electrical and/or mechanical faults that can lead to unexpected motor failure and consequently impulsiv...

The short-term hydropower generation scheduling (STHGS) is a complicated problem in the utilization of and water resources. An improved binary-coded whale optimization algorithm (IBWOA) proposed this paper to solve complex nonlinear problem. STHGS divided into unit combination (UC) subproblem economic load distribution (ELD) subproblem. For UC subproblem, we use sigmoid function (SF) generate b...

Here we show how to ensure a constant cost for the computation-unit in graphs depicting the number of (sequential) computation-units at different problem sizes. This is needed for a meaningful evaluation of scalability and efficiency, specially for distributed computations where it is an assumption of the measurement. We report empirical evaluation with ADOPT revealing that the computation cost...

In runtime enforcement of security policies, the classic requirements on monitors in order to enforce a security policy are soundness and transparency. However, there are many monitors that successfully pass this specification but they differ in complexity of both their implementation and the output they produce. In order to distinguish and compare these monitors we propose to associate cost wi...

Executive Summary The overall concept of Total Cost of Ownership for server clusters has been an important issue within the IT community for many years. Numerous studies and customer experiences have proven that purchase price alone is not an adequate measurement to compare server clusters from various vendors. Usually other factors, including the costs to manage and maintain the servers, as we...

This paper analyzes the efficiency of the Brazilian banking sector over the post-privatization period of 2000-2007. We employ a Bayesian stochastic frontier approach, which provides exact efficiency estimates and confidence intervals and thus, allows an accurate comparison across institutions and bank groups. The results suggest that large banks are the most cost and profit efficient, supportin...

Cost awareness and cost efficiency has always been major concerns to organizations from all industries but in the last few years its importance grew due to the global economic and financial crisis. Considering their small size and market exposure, Small and Medium Enterprises (SMEs) need cost awareness and efficiency more than ever. However, efficient and accurate costing methodologies are out ...