Wyniki wyszukiwania - BazTech

1

Dependability of a discrete transport system

Zamojski W.

Journal of Polish Safety and Reliability Association

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2012

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Vol. 3, No. 2

159--168

EN

A discrete system performing transport tasks (carriage of goods between the starting and ending points) using the vehicles of limited capacity and reliability is analyzed. The quality of transport tasks depend on the availability of transportation means (cars, roads, etc.), their functional properties (services) and reliability (faults and renewals) and of the system organization (dispatchers / system managers). Unfriendly system events affecting the realization of transport tasks are classified. A dependability model of the discrete transport system is considered as an unreliable service network. Outlined the idea of a maintenance policy system and a problem of synthesis of the discrete transport system.

2

From reliability to system dependability : theory and models

Zamojski W., Mazurkiewicz J.

Journal of Polish Safety and Reliability Association

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2011

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Vol. 2, No. 1

223--232

EN

The paper presents a novel approach to system dependability problem. The analysed systems and networks – characterised by different sets of features – are considered as a union of all their resources essential for the predicted tasks realisation. The system dependability is discussed with respect to the occurrence of incidents and treats that may cause to damage the system resources and – in consequence – to the collapse of the executed tasks. The maintenance policy system is based on two main concepts: detection of unfriendly events and system responses to them. The proposed analysis is realised from the user’s point of view, focusing on functional features described by business services available in the system.

3

Dependability of services networks

Zamojski W.

Journal of Polish Safety and Reliability Association

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2009

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Vol. 2

387--396

EN

In the tutorial paper systems and networks are considered as a union of all their resources essential for the realization of predicted tasks. System dependability is discussed with respect to the occurrence of incidents and treats that may cause damage to the system resources and, in consequence, to the executed tasks. The maintenance policy system is based on two main concepts: detection of unfriendly events and system responses to them. It is proposed to analyse the network system from the functional and user point of view, focusing on business service realized by a network system. Services networks are modelled as the Petri net models which may be useful for analyses of dependability parameters and for setting up a maintenance policy of the services net.

4

Modelling of a maintenance policy system for computer networks

Zamojski W., Caban D.

Journal of KONBiN

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2006

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No. 2

283--290

EN

Computer systems and networks are considered as a union of all their resources (hardware, software and personnel), essential for the realization of predicted tasks. The systems operate in a real environment, often hostile, which may be the source of such threats as attacks, viruses and human faults. Model of a computer network is proposed on the basis of information balance at nodes and in the entire network. It is used to evaluate the maintenance policy of the network.

5

Median filter implementations

Caban D., Zamojski W.

Machine Graphics and Vision

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2000

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Vol. 9, No. 3

719-728

EN

The paper reports on some experiments with implementing median or other rank--order digital image filters using field programmable devices. It demonstrates that a single field programmable device bay be used to build a median filter. The performance delivered using a Xilinx XC4000E-1 device exceeded 35 million pixels per second, when filtering within a 3×3 pixels window using 8-bit pixel representation. These results were obtained using autosynthesis, avoiding any direct manipulation in the design.