Przemysław Ryba

Przemysław Ryba
Wroclaw University of Science and Technology | WUT · Department of Systems and Computer Networks

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10
Publications
2,547
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26
Citations

Publications

Publications (10)
Conference Paper
The big data is usually described by so-called 5Vs (Volume, Velocity, Variety, Veracity, Value). The business success in the big data era strongly depends on the smart analytical software which can help to make efficient decisions (Value for enterprise). Therefore, the decision support software should take into consideration especially that we deal...
Article
Full-text available
In this paper we consider the problem of anomaly detection over time series metrics data took from one of corporate grade mail service cluster. We propose the algorithm based on one-sided median concept and present some results of experiments showing impact of parameters settings on algorithm performance. In addition we present short description of...
Conference Paper
Full-text available
This paper presents final results of investigation focused on modelling computer networks– a very important issue affecting Wide Area Networks nowadays. Modelling computer networks includes two main groups of problems: optimization of existing topologies and new topology design. In this paper we formulate FA and CFA problems for WAN and propose nov...
Article
Full-text available
Medical Telemetry System for Monitoring and Localization of Patients - Functional Model and Algorithms for Biosignals Processing The article presents the concept of hospital telemetric system. The goal of the project is a model of early warning systems for patients outside intensive care wards. Proposed system is based on constant telemetric monito...
Article
This paper addresses the problem of simultaneously design of large WAN satisfying quality demands and allocation of computing resources across the network. Model of the grid structure with hierarchical communication network is presented. Data is generated in the central node, then divided into blocks and distributed among nodes which can be located...
Conference Paper
In the paper the problem of designing two-level hierarchical structure of wide area network (WAN) is considered. The goal is to select gateways location, topology of 2nd level network, channel capacities and flow routes in order to minimize linear combination of the total average delay per packet and the total cost of leasing capacities of channels...
Conference Paper
In the paper the problem of designing two-level hierarchical structure of wide area network (WAN) is considered. The goal is to select gateways location, channel capacities and flow routes in order to minimize total cost of leasing capacities of channels of 2nd level network, subject to constraint on maximal acceptable value of average packet delay...
Conference Paper
In the paper the problem of designing two-level hierarchical structure of wide area network is considered. The goal is to select gateways location, channel capacities and flow routes in order to minimize total cost of leasing capacities of channels of 2nd level network, subject to delay constraint. An approximate algorithm is proposed. Some results...
Conference Paper
This paper studies the problem of designing two-level hierarchical structure wide area network. The goal is to select gateways location, 2nd level network topology, channels capacities and flow routes in order to minimize the total average delay per packet in hierarchical network subject to budget constraint. The problem is NP-complete. Then, the b...

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