Data in the warehouse can be seen as materialized views generated from the underlying multiple data sources. Materialized views are used to speed up query processing on large amounts of data. These views need to be maintained in response to updates in the source data. This is often done using incremental techniques that access data from underlying sources. In the data warehousing scenario, acce...

A major issue of locally repairable codes is their robustness. If a local repair group is not able to perform the repair process, this will result in increasing the repair cost. Therefore, it is critical for a locally repairable code to have multiple repair groups. In this paper we consider robust locally repairable coding schemes which guarantee that there exist multiple alternative local repa...

Abstract Achievement of an economic fusion reactor imposes a high level unprecedented requirements for neutral beam systems; the first one is nuclear safety constraints which impose prerequisite on ease access all injector components to provide preventive (and curative) maintenance by remote handling while maintaining operation. In addition, challenge develop high-power injectors with very wall...

The study aims to provide a Bayesian statistical method with natural conjugate for facilities’ preventive maintenance scheduling related the hybrid competing failure mode. An effective strategy not only can improve system’s health condition but also increase efficiency, and therefore firm needs make an appropriate increasing utilization of system reasonable costs. In last decades, issues deteri...

The paper investigates the power of the dynamic complexity classes DynFO, DynQF and DynPROP over string languages. The latter two classes contain problems that can be maintained using quantifier-free first-order updates, with and without auxiliary functions, respectively. It is shown that the languages maintainable in DynPROP exactly are the regular languages, even when allowing arbitrary preco...

Layered architecture prescribes a good principle for separating concerns to make systems more maintainable. One example of such layered architectures is the separation of classes into three groups: Boundary, Control, and Entity, which are referred to as the three analysis class stereotypes in UML. Classes of different stereotypes are interacting with one another, when properly designed, the ove...

One approach that has been used for integrating data from multiple databases consists in creating materialized integrated views which are stored in a centralized repository. The queries on the view can be processed directly from the integrated view, with no need for accessing the remote sources. The main diÆculty with this approach is to maintain the consistency of the materialized view with re...

  This expository article shows how the maximum likelihood estimation method and the Newton-Raphson algorithm can be used to estimate the parameters of the power-law Poisson process model used to analyze data from repairable systems .