In the distributed hydrological simulations for complex mountain areas, large amounts of meteorological input parameters with high spatial and temporal resolutions are necessary. However, the extreme scarcity and uneven distribution of the traditional meteorological observation stations in cold and arid regions of Northwest China makes it very difficult in meeting the requirements of hydrologic...

A model of the software maintenance process within a medium-sized organization is described. We set out both the abstract model and its implementation as part of a management tool, the Intelligent Software Maintenance Management System (ISMMS) prototype. The ISMMS provides a simulation environment for two sorts of management activities. In interactive mode, the characteristics of a particular s...

Nowadays, software development and maintenance are highly distributed processes that involve a multitude of supporting tools and resources. Knowledge relevant for a particular software maintenance task is typically dispersed over a wide range of artifacts in different representational formats and at different abstraction levels, resulting in isolated ‘information silos’. An increasing number of...

Species richness often peaks at intermediate productivity and decreases as resources become more or less abundant. The mechanisms that produce this pattern are not completely known, but several previous studies have suggested environmental heterogeneity as a cause. In experiments with evolving digital organisms and populations of fixed size, maximum species richness emerges at intermediate prod...

Scientific communities that are accustomed to use Grid resources are now considering the use of Cloud resources. However, moving from the Grid to the Cloud brings along the need for the creation and maintenance of the system image used to configure the provisioned resources, and this presents both opportunities and problems for the users. The impact is especially interesting in the context of g...

Preventive maintenance is a planned activity to keep the manufacturing facilities in good condition. However, because of limited time and resources, not all the system components can be repaired/replaced during the planned opportunity. When the system is under maintenance, it is very conservative to take the maintenance decision on the components because of limited available time and resources,...

The accurate estimation of software development effort has major implications for the management of software development in the industry. Underestimates lead to time pressures that may compromise full functional development and thorough testing of the software product. On the other hand, overestimates can result in over allocation of development resources and personnel [7]. Many models for effo...

An efficient and qualitative work using environments to software engineering management depend of structure, control and adequate use of the resources available to design and development. Between this resources is the versions manipulation of (sub)projects and component created in the engineering phases. Currently, the majority of the software engineering environments supports the versions mani...

Software defects rediscovered by a large number of customers affect various stakeholders and may: 1) hint at gaps in a software manufacturer’s Quality Assurance (QA) processes, 2) lead to an overload of a software manufacturer’s support and maintenance teams, and 3) consume customers’ resources, leading to a loss of reputation and a decrease in sales. Quantifying risk associated with the redisc...

This paper presents the implementation of the “Self-Chord” P2P system. Self-Chord inherits the ability of Chord-like structured systems for the construction and maintenance of an overlay of peers, but features enhanced functionalities deriving from ant-inspired algorithms, such as autonomy behavior, self-organization and capacity to adapt to a changing environment. Self-Chord has three main adv...