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Tomasz Nowakowski

Abstract

There are several trends of development of modern reliability theory; some of them are subjects of everyday engineering activity, like: quality control of mass production or “pure” reliability. But most of these issues, such as: effectiveness, survivability, safety, security, are currently the subject of many works of conceptual, modeling, case study or survey nature. The aim of this article is show how the performance requirements of technical objects were supplemented with: customer expectations (quality), abilities to prevent the loss of the object properties in operation time (reliability and maintainability), the effects of undesirable events and protection against them (safety and security) and the ability to restore performance (resilience).

Open access

Tomasz Nowakowski and Maciej Nowakowski

Abstract

Changes in horticulture induce fruit producers to introduce more efficient tree pruning systems. The increase of efficiency is related to application of various cutting devices, the effect of which on cultivated fruit trees has not been completely recognized yet. Therefore, the objective of the paper was to compare and assess the fruit tree sprouts cut with various types of cutting units. Four cutting units were applied in the study: pruning shears, anvil secateur, circular saw and chain saw and four cultivars of fruit trees: apple, pear, plum and cherry tree. A fractal dimension was used for assessment of the cutting quality that allows assessment of the spatial complexity of the image of the cut sprout. The obtained results allowed determination that the least sprout damaging cutting system is in case of the use of the anvil secateur and pruning shears (the best cutting quality) then circular and chain saw. It was also proved that susceptibility to damage is characteristic for the investigated fruit trees. Pear trees proved the lowest susceptibility to damages regardless the cutting unit.

Open access

Tomasz Nowakowski, Agnieszka Tubis and Sylwia Werbińska-Wojciechowska

Abstract

In the presented paper, authors focus on the issues related to asset management in enterprises. The aim of the article is to present the requirements and standards defined in ISO 55001. Thus, there are presented the basic definitions related to the research area. Later, there are discussed the main guidelines set out in the standard, with taking into consideration e.g. asset management system structure. Moreover, there are defined the basic procedural steps in the process of ISO 55001 standard implementation in enterprises. This gives the possibility for the analysis of ISO 55001 standard possibilities of implementation in Polish enterprises. The article concludes with a summary.

Open access

Tomasz Nowakowski and Sylwia Werbińska-Wojciechowska

Abstract

In this paper, the authors’ research work is focused on uncertainty analysis implementation in the developed DSS for transportation means’ maintenance processes performance. Thus, in the Introduction section, the transportation means’ maintenance processes issues and the uncertainty problem are described. Later, there is briefly literature overview in the research area discussed. In the next Section, the expert system for means of transport maintenance processes performance is also investigated. Following this, the uncertainty analysis is developed and the examples of expert system implementation are given. The work ends up with summary and directions for further research.