Ladislav Hluchy

A roadmap for a dedicated Earth Science Grid platform

Due to its intensive data processing and highly distributed organization, the multidisciplinary Earth Science applications community is uniquely positioned for the uptake and exploitation of Grid technologies. Currently Enabling Grids for E-sciencE, and other large Grid infrastructures are already deployed and capable of operational services. So far however, the adoption and exploitation of Grid technology throughout the Earth Science community has been slower than expected. The Dissemination and Exploitation of GRids in Earth sciencE project, proposed by the European Commission to assist and accelerate this process in a number of different ways, had between its main goals the creation of a roadmap towards Earth Science Grid platform. This paper presents the resulting roadmap.

Problem‐solving environment for flood forecasting

This paper presents a prototype of the collaborative problem solving environment (PSE) for flood forecasting. Flood forecasting is a complex problem that requires cooperation of many scientists in different areas. To enable this cooperation in a manner comfortable to hydrometeorological experts, a part of the CrossGrid project is aimed towards developing a PSE, whose prototype is described here. The PSE consists of a cascade of simulation models, a storage system for computed and measured data and other used datasets, a Web‐based portal with collaboration tools and a powerful computation facility. The whole system is tied together by grid technology and is used to support a virtual organization of experts, developers and users.

Flood Forecasting in CrossGrid Project

This paper presents a prototype of flood forecasting system based on Grid technologies. The system consists of workflow system for executing simulation cascade of meteorological, hydrological and hydraulic models, data management system for storing and accessing different computed and measured data, and web portals as user interfaces. The whole system is tied together by Grid technology and is used to support a virtual organization of experts, developers and users.

Hydro-meteorological Scenarios Using Advanced Data Mining and Integration

We present a hydro-meteorological scenario and its adaptation to a novel, advanced data integration and data mining platform developed within the project ADMIRE. The scenario uses data mining techniques instead of more common physical models in order to predict phenomena which are not being ordinarily solved in Slovakia – water temperature and discharge wave propagation downstream of a major water reservoir. The scenario is one of a set of use cases, which form the Flood Forecasting Simulation Cascade – a pilot application of ADMIRE. We describe the data integration methodology approach we have devised, and the variables used in data mining training of the scenario.

Knowledge management for organisationally mobile public employees

Public organisations often face knowledge management problems caused by organisational mobility, the continual and pervasive movement of staff between units and departments. This can be a strength, but also introduces problems of loss of experience and reduced efficiency and effectiveness in working. The Pellucid project is developing a knowledge management system to assist in such situations. The projects three pilot applications are described, and an abstracted view of their knowledge management needs is developed. An outline of key parts of the technical solution is given.

Use of E-mail Social Networks for Enterprise Benefit

The article discusses the potential methods and benefits of the analysis of social networks hidden in the enterprise and personal email archives. A proof-of concept prototype was developed. Social network extraction and the spreading activation algorithm are discussed and evaluated.The article discusses the potential methods and benefits of the analysis of social networks hidden in the enterprise and personal email archives. A proof-of concept prototype was developed. Social network extraction and the spreading activation algorithm are discussed and evaluated.

Ontology Assisted Access to Document Repositories in Public Sector Organizations

This paper describes a method that combines ontology and full-text indexing to search documents in organizational repositories. The method was used in a system supporting organizational activity by formalizing, sharing and preserving operational experience and knowledge for future use. The paper is based on results obtained from EU IST Pellucid Project.

Distributed Knowledge Management Based on Software Agents and Ontology

In this paper we present the use of ontology for knowledge representation and handling in Software Agent Systems. Motivation has come from Pellucid IST project where we need to capture and capitalize employee’s knowledge in organization. This knowledge is then presented to other employees as they work on particular tasks. The Protege ontology editor and JADE multi-agent system is used for implementation. Ontology is usually used in intra-agent communication for agents to understand each other; we used ontology also as knowledge data model to store knowledge as instances of ontological terms into object database, thus agents can access and manipulate knowledge data directly and still stay lightweight.

A novel approach for developing interoperable services in cloud environment

Cloud computing has seen a tremendous growth in the last five years. Along with the growth, many cloud models have been marketed. They deliver hardware and software as virtualization enabled services to users. Although cloud computing offers considerable advantages such as unlimited resources, manageability and lower investment costs but there are still barriers to exploit it. One of the barriers is the difficulties, which users are being faced when developing and deploying their own services into clouds. In this paper, we present a novel approach for developing interoperable services that can be deployed in different cloud infrastructures at the same time. The approach provides an instrument with emphasis on abstraction, inheritance and code reuse. Using the approach, cloud-based services are developed easily by extending existing abstractions classes provided by the instrument or other developers. The interoperability between different clouds is solved via the basic abstraction class of the instrument and all services are inherited and benefited from this advantage.

3D visualization the results of complicated Grid and Cloud-based applications

The presented work is aimed at creation and test on-line visualization tool for Grid or Cloud-based Parametric Studies as a sequence application in Grid environment. The design is tested on the applications those have the character as a Parametric studies. Examples are the Astronomical simulations. One of them is the simulation of the Oort-cloud formation. The dynamical evolution of the test particles was followed via numerical integration, in the GRID, for the period of 2 Gyrs. The main problem is Visual control in time when the Grid application is still running.