We argue that traditional sequencing technology developed in the field of intelligent tutoring systems could find an immediate place in large-scale Web-based education as a core technology for concept-based course maintenance. This paper describes a concept-based course maintenance system that we have developed for Carnegie Technology Education. The system can check the consistency and quality ...

Nimitz-class aircraft carriers are very expensive ships to build, own, and operate. The procurement cost for CVN 77 will be more than $5 billion. Each Nimitz-class carrier has an average annual operations and maintenance cost of approximately $240 million, slightly less than half of which is for shipyard availabilities. A little less than a third of the annual cost is for the pay and allowances...

Satisfying the performance needs of tomorrow typically implies using modern processor capabilities (such as single instruction, multiple data) and co-processors (such as graphics processing units) to accelerate database operations. Algorithms are typically hand-tuned to the underlying (co-)processors. This solution is error-prone, introduces high implementation and maintenance cost and one impl...

The aim of this work is to propose a (max, +) optimization model for scheduling transfer operations on a flow network within a given maintenance framework. The case study involves the scheduling of oil batch transfer operations in coordination with valve maintenance activities in an oil-exporting seaport. The optimum schedule is determined through an intuitive, and synthetized mathematical mode...

One of the most important factors that influence people’s daily lives and their well-being at work is so-called “worker safety”. Different literature works demonstrated positive effects on worker mood brought by awareness being in a safe environment and, consequently, less prone to accidents. Every working should guarantee safety protection employees operators both normal operations extraordina...

Maintenance contributes to gaining high business performance, guarantees system availability and reliability as well safe sustainable operations. activity effectiveness depends on competences the skills of operators whose performance strongly affects maintenance production The research field human issues in industrial was deeply addressed literature; however, current paradigm, which focusses in...

Claims concerning the maintainability of object oriented software usually refer to encapsulation and inheritance mechanisms. However, if objects are perceived only from the code level, potentials for higher level maintenance operations are missed. Moreover, classical maintenance focussing just on code destroys the relationship that once existed between specification and implementation. We prese...

The safety and reliability of air transportation depends on minimizing inspection and maintenance errors that occur in the aircraft maintenance system. Efforts have been invested to track maintenance errors. These efforts are reactive in nature: they analyze maintenance errors after their occurrence. There is a lack of standardization in the assessment of maintenance errors across the maintenan...

The maintenance management plays an important role in the monitoring of business activities. It ensures a certain level of services in industrial systems by improving the ability to function in accordance with prescribed procedures. This has a decisive impact on the performance of these systems in terms of operational efficiency, reliability and associated intervention costs. To support the mai...

With the extensive and worldwide increase of the market share of wind energy, the optimal operation of wind farms gains an ever growing significance. The planning and scheduling of maintenance operations is both decisive for turbine availability and a key component of the operational costs. This paper introduces a formal model of wind farm maintenance, and proposes a mixed-integer programming f...