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The development and complexity of functionalities of the information systems are the reasons why the conception and realization of the system, being strategic for the enterprise, belong to professional activities. The protection of the data in the information systems against the improper disclosure or modification is an important requirement of each system. Nowadays the information systems of the...
Virtual Reality is becoming more than a part of our everyday life, helping us to identify quickly the elements of the environment or to better entertain us. The purpose of this paper is to present an application framework that we are developing, in order to help others implement their own applications. In the first section the focus is set on the Augmented Reality basic concepts and the necessity...
The difference between what is expected from a service and what is perceived as a response underlies the estimation of the quality of that service. We propose a mechanism for the assessment of the service quality built on Dolce based expectations. Its components range from expectations creation according to the service description to monitoring of the expectations fullfillment according to the service...
The need for efficient organization of files grows with the computer storage capabilities. However, a classical hierarchical file system offers little help in this matter, excepting maybe the case of links and shortcuts. OrcFS proposes a solution to this problem. By redefining several file system concepts, it allows the user to set custom metadata, in the form of property-value pairs, that describes...
In order to enable interactive applications to benefit from the offerings of the Cloud paradigm, factors such as QoS and event handling need to be taken into consideration in the development of new platforms. In this paper we propose a hierarchical Execution Management System Architecture that enables the execution of real-time interactive applications on SOIs by providing the required QoS levels.
It is significant for companies to ensure their businesses conforming to relevant policies, laws, and regulations as the consequences of infringement can be serious. Unfortunately, the divergence and frequent changes of different compliance sources make it hard to systematically and quickly accommodate new compliance requirements due to the lack of an adequate methodology for system and compliance...
The use of data mining techniques in environmental applications of IT, and specifically in hydro-meteorological predictions, is not a new topic. In this paper however we present the novel use of data mining in the ADMIRE Project and its scenarios. In Orava scenario we try to predict the change of water level and water temperature in the OravaRiver below the Orava reservoir, and how they react to discharge...
Software connectors are external coordination devices which ensure the flow of data and enforce synchronization constraints within a component's network. The specification of software connectors through which context dependent behaviour is correctly propagated remains an open, non trivial issue in their semantics. This paper, building on previous work by the authors, revisits this problem and introduces...
This paper describes a new key forwarding protocol for networks messages exchange which guaranties both authentication of participants and forward security. The protocol lies within the framework of a keys derivation scheme used for spanning tree-based networks messages diffusion where compromising a key in a node involves compromising all derived keys in the corresponding sub tree. A complete specification...
The scope of this paper is to discuss and analyze different approaches and solutions in which the interoperability between the Spatial Data Infrastructure (SDI) and the Grid environment is feasible. Most of the SDIs are exposed using Geospatial Web services, standardized by the Open Geospatial Consortium (OGC). The Grid environment was built to overcome the distributed computing problems regarding...
Service oriented architectures and their semantic enhancements make distributed environments more user and computer friendly. In SOA-oriented distributed scientific environments, the services implementing complicated mathematical algorithms can be the building blocks for complex applications. We expect that the reuse of remote services instead implementation dependent libraries can be the next step...
In this paper we approach the context management problem by defining a self-healing algorithm that uses a policy-driven reinforcement learning mechanism to take run-time decisions. The situation calculus and information system theories are used to define and formalize self-healing concepts such as context situation entropy and equivalent context situations. The self-healing property is enforced by...
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