Temat: Risk analysis - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: A new mathematical model for analytical risk assessment and prediction in IT systems
Autorzy:: Fray, I. E.
Kurkowski, M.
Pejaś, J.
Maćków, W.
Tematy:: risk analysis
risk analysis methods
formal model for risk analysis; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:: https://bibliotekanauki.pl/articles/206238.pdf Link otwiera się w nowym oknie
Opis:: In this paper, we propose a new formal model to describe risk analysis and measurement process for IT systems. Our model complies with international standards and recommendations for non-profit organisations. The model accounts for solutions used in widely known and recommended risk analysis methods and provides for evaluation of efficacy of these solutions. A simple example illustrates the application of the proposed model for effective risk analysis of any IT system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Risk in systems with virtualization : test case analysis
Autorzy:: Stanclik, M.
Walkowiak, T.
Tematy:: virtualization
risk analysis
threats; Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Powiązania:: https://bibliotekanauki.pl/articles/2069148.pdf Link otwiera się w nowym oknie
Opis:: The paper presents an approach to risk analysis of exemplar test case information systems. Authors point out the common practice to implement virtualization and put away security considerations for future[5]. The overview of virtualization techniques, focusing on server virtualization is given. Next, authors present risk analysis of exemplar GIS system. First of all identification of threats is taken out focusing on virtualization aspects, but it also includes common threats for both that could have a significant impact on safety when using a virtualization. The risk assessment for the test case system was performed using qualitative method. Assessment of the likelihood and magnitude of impact of identified risks was performed on the basis of the expert’s knowledge and experience. The obtained results were used to develop risk rankings, which indicate the risks that need special attention when designing and managing a virtual system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Level of Risk and Decision-making in Managing Industrial Activity with the Elimination of Negative Environmental Impacts
Autorzy:: Végsöová, Oľga
Straka, Martin
Kyšeľa, Kamil
Tematy:: risk
danger
threat
risk analysis
risk assessment; Pokaż więcej
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Powiązania:: https://bibliotekanauki.pl/articles/1811590.pdf Link otwiera się w nowym oknie
Opis:: This paper focuses on the assessment of the degree of risk in all phases of extraction activities in a selected quarry in the Slovak Republic. The research part of the paper assesses the degree of risk resulting from the assessment of the threat, the probability of the threat and the consequence of an adverse event in extraction activities. The paper offers an important basis for decision-making in quarry management in order to eliminate the negative consequences of andesite mining on the environment, equipment and people. The extraction activity in the Kecerovský Lipovec quarry is assessed by this paper as low risk for two phases of extraction, specifically the preparation phase, and the extraction itself. The paper also highlights the importance of taking measures. Regarding the safety criteria in the Kecerovský Lipovec quarry, it is possible, based on the results of the analysis and evaluation, to consider the quarry to be safe. However, a condition for this is the necessary expert training of workers in all activities performed while working in the quarry. Here, the need for personnel to strictly adhere to the set standards for extraction activities is of prime importance. This finding confirms the above that the aim of diagnosing and naming the potential for adverse events in the extraction process must be to minimize risks, as their absolute exclusion is not possible due to the human factor and unforeseeable circumstances.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Statistically (optimal) estimators of semivariance: A correction of Josephy-Aczel’s proof
Autorzy:: Fleischer, Karlheinz
Nietert, Bernhard
Tematy:: risk analysis
semivariance
statistical estimation; Pokaż więcej
Wydawca:: Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Powiązania:: https://bibliotekanauki.pl/articles/433944.pdf Link otwiera się w nowym oknie
Opis:: Semivariance is an intuitive risk measure because it concentrates on the shortfall below a target and not on total variation. To successfully use semivariance in practice, however, a statistical estimator of semivariance is needed; Josephy and Aczel provide such an estimator. Unfortunately, they have not correctly proven asymptotic unbiasedness and mean squared error consistency of their estimator since their proof contains a mistake. This paper corrects the computational mistake in Josephy-Aczel’s original proof and, that way, allows researchers and practitioners in the field of downside portfolio selection, hedging, downside asset pricing, risk measurement in a regulatory context, and performance measurement to work with a meaningfully specified downside measure.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: How to Estimate Security – Problem Analysis
Autorzy:: Pilarski, Grzegorz
Tematy:: security
estimation
risk analysis
political risk
forecasting; Pokaż więcej
Wydawca:: Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/1807890.pdf Link otwiera się w nowym oknie
Opis:: Background: The article presents a method of estimating the security level which indicates how probable it is for a phenomenon to occur. Objectives: The author attempts to answer the question: How do we estimate security? Decision makers usually need percentage showing the probability of an incident taking place in the future. This information is needed in the first place, later decision makers can use more descriptive information. Methods: The research problem concerns the assessment of security using the estimation method. Depicting security in numbers is difficult, thus the descriptive method is also usually applied. The estimation method facilitates the assessment. It is helpful since it is partly done by calculation and partly by guessing or approximation. Based on a case study analysing whether a terrorist attack may occur, the author also used tools such as averaging expert predictions, scenario analysis and risk analysis. Results: This article provides a view on forecasting security, which results in a method of estimating the level of security. Conclusions: The author presents an approach which allows to initially estimate the security level of the analyzed phenomenon in a relatively short period of time.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Failure risk analysis in the water distribution system
Autorzy:: Tchórzewska-Cieślak, B.
Tematy:: risk analysis
failure
risk
water distribution system; Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Powiązania:: https://bibliotekanauki.pl/articles/2069656.pdf Link otwiera się w nowym oknie
Opis:: A water distribution system (WDS) ought to be high reliable continuous operating system. Failure factors in WDS should be identified and prioritised, for example, the causing factors in the most frequent failures in water-pipe network. In this paper, the failure risk analysis of the WDS is presented, and accordingly, a New method consisting the failures index (FI) and the evaluation of risk of failure within the relevant area, based on the assumed categories (tolerable, controlled and unacceptable risk). It is expecting that the methodology for the WDS performance risk analysis would provide the city leadership for decision making support.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Zagrożenie wybuchem wodoru na okręcie podwodnym. Cz. IV, Prowadzenie projektów wysokiego ryzyka
The risk of hydrogen explosion in a submarine. Part IV, the implementation of high risk projects
Autorzy:: Kłos, R.
Tematy:: ryzyko projektowe
analiza ryzyka w projekcie
metoda analizy ryzyka
project risk
project risk analysis
risk analysis methods; Pokaż więcej
Wydawca:: Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Powiązania:: https://bibliotekanauki.pl/articles/1359799.pdf Link otwiera się w nowym oknie
Opis:: W cyklu artykułów przedstawiono problematykę prowadzenia projektu dużego ryzyka na przykładzie modernizacji spalarek wodoru na okręcie podwodnym. W artykule opisano problemy zarządzania takim projektem.
This series of articles on high risk projects looks at the example of the modernisation of hydrogen incinerators on a submarine. The article describes problems connected with the management of such a project.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The Importance of Information in Crisis Management
Autorzy:: Kaczmarczyk, Barbara
Tematy:: crisis situations
crisis management
risk analysis; Pokaż więcej
Wydawca:: Wyższa Szkoła Policji w Szczytnie
Powiązania:: https://bibliotekanauki.pl/articles/1375100.pdf Link otwiera się w nowym oknie
Opis:: Threats have accompanied humanity since the dawn of time. Most of them can develop into crisis situations that can be interpreted in many different ways. The crisis situation is closely linked with the concept of crisis management, which is implemented in four phases. At every stage of work, various elements are significant in terms of crisis management. There are also elements that are very important at every stage. These include: threat analysis, estimation of the probability of their occurrence in a given area, and assessment of their sensitivity. An appropriate information flow system supports the implementation of the above elements. This system should be effective in such relations as between services and between services and society. The effectiveness of information flow depends on the reliability of this information and its flow channel. Information is of particular importance in the decision-making process. It should have appropriate features and properties. Based on the information, both good and bad decisions can be made. In crisis management, this can be relevant to human health and even human life. This article discusses issues related to the nature of information in crisis management.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Steam turbine maintenance planning based on forecasting of life consumption processes and risk analysis
Autorzy:: Rusin, Andrzej
Tomala, Martyna
Tematy:: steam turbine
risk analysis
preventive maintenance; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Powiązania:: https://bibliotekanauki.pl/articles/2172025.pdf Link otwiera się w nowym oknie
Opis:: Flexible operation of coal-fired power plants contributes to the intensification of the life consumption processes, which is a serious problem especially in the case of units with a long in-service time. In steam turbine rotors, the crack propagation rate and material wear caused by low-cycle fatigue increase. The aim of the research is an attempt to forecast the development of these processes and to estimate the probability of critical elements damage, such as the high-pressure and intermediate-pressure rotors. In the stress state analyses, the finite element method (FEM) is used, the Monte Carlo method and the second order reliability method (SORM) is apply to calculate the probability of failure. It is proposed to use risk analysis to plan preventive maintenance of the turbine. The optimal intervals for carrying out diagnostic tests and prophylactic repairs is determined for various operating scenarios and various failure scenarios. This enables a reduction of the costs while ensuring the safety of the turbine's operation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Identification of hazards in the workplaces of Artisanal mining in Katanga
Autorzy:: Elenge, Myriam M.
De Brouwer, Christophe
Tematy:: artisanal mining
risk factor
risk analysis
occupational health
Katanga; Pokaż więcej
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Powiązania:: https://bibliotekanauki.pl/articles/2185473.pdf Link otwiera się w nowym oknie
Opis:: Objective: While artisanal mining takes place in casual framework and with total ignorance of good practices, few studies have focused on the origin of hazards specific to each workplace constitutive of this exploitation facility. Nevertheless, this study is a condition of an efficient occupational health and safety control in this sector. Materials and Method: We took the effort to identify different workplaces, as well as hazards specific to each of them, through the observation and analysis of the tasks, tools and the processes related to their use applied in the Ruashi artisanal mine. Results: The investigated exploitation facility consists of five workplaces: diggers (60% – in charge of mineralized gangue recovery); crushers; washers; hand-made furnace workers (in charge of various treatment processes); and loaders (in charge of packing the obtained material). Beside the risks common to these various workplaces and ensuing notably from the lack of hygiene and working in bad positions, operating in underground galleries, in particular, exposes diggers to the risks connected with collapsing parts of the mine, suffocation, dehydration or fine particles in the breathed air. Crushers are especially exposed to traumatism risks, notably ocular, and loaders are exposed to risks related to handling heavy loads. These risks are connected with the mining processes because, in spite of the similarity of tools, they appear less often in other forms of artisanal exploitation described in literature. It is notable in the case of crushing in sawed gas bottles where ocular trauma risk is decreased. It was also shown that humidification of work surface reduces dust particles emission into the air. Conclusions: Hazards identification, through a tools and processes description, has the advantage of providing information on reducing the occurrence of these risks. It shows that this reduction is not necessarily a consequence of the activity mechanization degree.
Dostawca treści:: Biblioteka Nauki

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