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Reliability Estimation of Burr Type III Distribution under Improved Adaptive Progressive Censoring with Application to Surface Coating

Asadi Saeid, Panahi Hanieh, Anwar Sadia, Lone Showkat Ahmad

Eksploatacja i Niezawodność

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2023

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Vol. 25, no. 2

art. no. 163054

EN

The stress-strength reliability (SSRe) model is widely investigated in reliability engineering to determine the probability of the strength component overcomes the stress imposed on it. In this paper, we studied the estimation of SSRemodel based on the Burr III distribution under the improved adaptive progressive type-II censoring scheme (IAPrgCS-II). Estimation methods of the SSReparameters are developed using frequentist and Bayesian approaches. The point and interval estimations using the maximum likelihood are considered to estimate the parameters. Two approximations are applied to compute the Bayes estimates. A simulation study is conducted for the comparison of the methods of estimation. Also, parallel to the development of reliability studies, it is necessary tostudy its application in different sciences such as engineering. Therefore, the droplet splashing (DrS) data under two wettabilities are proposed as an application of the considered SSRe model and methods. The results show us that the reliability model can be used to amend the quality of coatings.

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Architecture of the future in the Eastern Europe: reality and illusions

Proskuryakov Victor, Bohdanova Yuliia

Środowisko Mieszkaniowe

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2020

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nr 31

100--112

EN

This paper presents the outcomes of two international conferences: 'On the way to architectural education and the profession of the future' and 'Genesis and development directions of the future architecture in the Eastern Europe', which took place on 28 November 2018 and 28 November 2019, respectively, at the Lviv Polytechnic National University. During the conference, educationalists, researchers, experts from architectural and artistic schools of Ukraine from Lviv, Kyiv, Odessa, Chernivtsi, Dnipro, Lutsk; Poland - from the city of Kielce; Germany - from Dresden University of Technology; Canada - from the city of Toronto, discussed what had to be done and done unquestionably so that we could not only dream about an architecture of the future but also actively create it. Not asking a formal request of the speakers to present what came out of the predictions of the architects / futurists of the twentieth century directed, according to their understanding, into close (the 1970s and 80s), non-distant (the 1990s) and distant future (the turn of the twenty-first century). Instead, they wanted to plant into the architectural reality of modern Eastern Europe, and Ukraine, Poland, Germany in particular, those sprouts of the new in architecture which are associated with 'the architecture of the future' and that are currently being born and their blooming can be expected in the Eastern Europe and the world in the future.

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Ryzyko wydobycia wynikające z zagrożenia metanowego

Cichowski E.

Archives of Mining Sciences

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2003

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Vol. 48, nr 1

81-100

PL

W artykule rozpatruje się warunki konieczne następstwa zdarzeń poprzedzającego wypadki lub/i szkody materialne, których jedną z przyczyn pośrednich był wybuch metanu. Przyjęto, że każdy skutek implikuje konieczne następstwo zdarzeń, które go poprzedza (Cichowski, Armbruster 1996; Cichowski, Faber 2002), a którego składniki istotne przedstawiają przyczynowość wypadkową, gdyż są zawsze prawdziwe, gdy prawdziwy jest rozpatrywany skutek ostateczny. Identyfikację przyczynowości wypadkowej przy wybuchu metanu utrudnia fakt, że zarówno inicjacja, jak i skutki wybuchu metanu mogą być skojarzone z różnymi zmianami parametrów środowiska pracy (Kozłowski 2000). Ryzyko wydobycia wynika z przyczynowości wypadkowej zachodzącej przy deficytach bezpieczeństwa. Zostało ono rozpatrzone dla zagrożenia metanowego. Dla zobrazowania zachodzącego następstwa zdarzeń skojarzonego z wybuchem metanu zastosowano podstawowe funktory logiczne oraz przyjęto topologiczne odwzorowanie zachodzącego następstwa zdarzeń.

EN

Accidents, occupational diseases and material damages, in short every harmfulness occurring in a mining plant, is an undesirable effect of the conducted mining. The harmfullness results from a chain of necessary causes that precedes it The essential components of the chain of causes are the events both on the side of the work environment parameters, and on the side of the crew (activity) In the case of methane explosion hazard, on account of the complex character of the events taking place, identification of accident causality requires a simplified approach to this problem, most frequently without investigation of the occurring processes (Karpiński 1978). In an analysis carried out in item 3, presented is a chain of necessary conditions preceding an accident and/or material damage, whose one of the indirect causes was methane explosion (formula 4). It was assumed that the essential components of the necessary sequence of events decide about accident causality, which is based on the fact that their occurrence is the necessary condition for the occurrence of the undesirable final effect. The figure, apart from the necessary conditions of the sequence of events (graph nodes), presents accident causality (direct cause, indirect causes, principal conditions of the necessary sequence of events and their original causes. Essential components of the necessary sequence of events (accident causality) preceding a recognized accident WY or/and material damage SMare as follows: (p. 3.1. - 3.2.). As a result of the retrospective analysis carried out, the causality of accidents or/and material damages, one of the indirect causes of which was methane explosion, has been determined. Both with the initiation, and the effects of methane explosion, other undesirable changes of the work environment parameters are associated, e.g. egzo- and endogenic mining fire, rock bump, sudden inrush of water, shooting operations carried out not in agreement with the regulations of the Code of Safety, sparking in an electric installation, loss of stable balance of the various objects of the mining work environment etc. Accident causality is the starting point for an assessment of the risk of mining, resulting from the relative hazard taking place. The essence of the relative hazard are all the selected indirect causes, including also the associated ones, conditioned by the occurring deficits of safety. When analysing, in detail, the causality of accidents and/or material damages, mentioned were, by the way of an example, the deficits of safety creating conditions favourable to an undesirable sequence of events.