scholarly journals FAULT TREES AND BELIEF NETWORKS IN RISK MODELLING: A COMPARATIVE ANALYSIS

Author(s):  
Oļegs Uzhga-Rebrov ◽  
Galina Kulešova

Nowadays, an ever-growing complexity of technical systems can be observed worldwide, problems of rational use of nature resources and diminution in negative impact on the environment are not completely settled yet, and international competition in different areas is strengthening. All the above tendencies cause an increase of different risks: technical, ecological, political, military and financial. Due to their nature, most of the risks are caused by a set of factors with commonly unknown relationships. Therefore, the need to use risk modelling methods that enable visual representation of the sets of cause-risk relationships becomes evident. This paper briefly examines two widely used techniques of modelling risky situations: fault trees and belief networks, and provides their comparative analysis.

2020 ◽  
Vol 18 (9) ◽  
pp. 1787-1798
Author(s):  
S.N. Ayusheeva

Subject. This article assesses the effectiveness of the existing system of environmental management based on the user-pays principle in terms of reducing the negative impact on the environment. Objectives. The article aims to conduct a comparative analysis of the anthropogenic impact on natural environment components and deficiency payments for pollution in the model areas of the Russian Federation. Methods. For the study, I used the methods of computational, comparative, systems, and structural analyses. Results. Based on the ecological rating of the Russian Federation subjects, the article defines model areas, assesses the degree of anthropogenic impact on the basis of pollution relative rates, and describes the particularities of environmental investment in the selected areas. Conclusions. The system of payments for pollution does not affect the economic behavior of economic entities.


2021 ◽  
Vol 104 (2) ◽  
pp. 003685042110209
Author(s):  
Zain Ul Hassan ◽  
Muhammad Usman ◽  
Muhammad Asim ◽  
Ali Hussain Kazim ◽  
Muhammad Farooq ◽  
...  

Despite a number of efforts to evaluate the utility of water-diesel emulsions (WED) in CI engine to improve its performance and reduce its emissions in search of alternative fuels to combat the higher prices and depleting resources of fossil fuels, no consistent results are available. Additionally, the noise emissions in the case of WED are not thoroughly discussed which motivated this research to analyze the performance and emission characteristics of WED. Brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were calculated at 1600 rpm within 15%–75% of the load range. Similarly, the contents of NOx, CO, and HC, and level of noise and smoke were measured varying the percentage of water from 2% to 10% gradually for all values of loads. BTE in the case of water emulsified diesel was decreased gradually as the percentage of water increased accompanied by a gradual increase in BSFC. Thus, WED10 showed a maximum 13.08% lower value of BTE while BSFC was increased by 32.28%. However, NOx emissions (21.8%) and smoke (48%) were also reduced significantly in the case of WED10 along with an increase in the emissions of HC and CO and noise. The comparative analysis showed that the emulsified diesel can significantly reduce the emission of NOx and smoke, but it has a negative impact on the performance characteristics and HC, CO, and noise emissions which can be mitigated by trying more fuels variations such as biodiesel and using different water injection methods to decrease dependency on fossil fuels and improve the environmental impacts of CI engines.


2021 ◽  
Vol 0 (1) ◽  
pp. 108-113
Author(s):  
Galina S. Dokurno ◽  
◽  
Elena V. Khotko ◽  

Environmental auditing is one of the ways to reduce the negative impact on our environment. The publication describes the procedure for conducting an environmental audit. The authors pay special attention to the analysis of the main resources, analyzed over the long-term practice of environmental audits, by the employees of the department of environmental certification and audit of RUE “Bel NIC” Ecology “.


2021 ◽  
Author(s):  
Kostandin Nasto ◽  
Junada Sulillari

The aim of this study is to realize an analysis of public-private partnerships (PPPs) in Albania. Our focus will mainly be the PPPs in the energy sector. Public-private partnerships contracts have experienced a significant increase in the last decades in Albania. They have had a great impact on public finances of the country, this is why they have often been “attacked” for the negative impact that they might have on the actual and especially the future of the country. We will work to make a comparative analysis of the cost and benefits that Albania has had from signing these contracts. We will also work to analyze the management of these public-private partnerships during the pandemics, which will be helpful to reveal the possible difficulties that the government might have in managing them. Something that has inspired us to make a deeper analysis of them is related to the energy crises that the country has experienced in the last years. We want to “dig” deeper in order to see if these PPPs are really worth it or not. Is it worth or it brings a burden for the actual and future generations of Albania?


Author(s):  
Hakki Karatas ◽  
Nildag Basak Ceylan ◽  
Ayhan Kapusuzoglu

The purpose of this chapter is to examine the drivers of secondary bond market and stock market liquidity for investment analysis after global financial crisis in Turkey. The literature in Turkey mainly focuses only on the volatility of return for driving liquidity in both bond and stock markets. However, it is argued that other types of volatilities including domestic and international volatilities have also a deteriorating impact on secondary market liquidity in Turkey. In this context, it is empirically tested whether the volatility and/or uncertainty that stem from the FED and ECB policies within the last 10 years had a negative impact on liquidity both in government bond and stock markets. Moreover, the impact of non-residents in bond and stock markets on secondary market liquidity is examined by including their holdings in stock and bond market.


2019 ◽  
Vol 26 (3-4) ◽  
pp. 334-358 ◽  
Author(s):  
Jo Spangaro ◽  
Jane Koziol-McLain ◽  
Alison Rutherford ◽  
Anthony B. Zwi

Intimate partner violence (IPV) routine screening is widely implemented, yet the evidence for pathways to impact remains unclear. Of the 32 abused women interviewed 16 weeks after antenatal IPV screening, 24 reported positive impact, six reported nil positive impact, and two reported negative impact. Using qualitative comparative analysis (QCA), key conditions for positive impact were care in asking, and support and validation from the midwife. Lack of these and lack of continuity of care were relevant to nil positive impact. Benefits included naming the abuse, connection, unburdening, taking steps to safety, and enabling informed care. Disclosure was not required for positive impact.


2019 ◽  
Vol 3 (1) ◽  
pp. 26-35 ◽  
Author(s):  
Ning Zhang ◽  
Bo Liu

Purpose This paper aims to find out how business aligns with robotic process automation (RPA) and whether the alignment has the same factors as for IT–business alignment. Design/Methodology/Approach Condition configurations for positive and negative impact for business alignment with RPA. Findings The positive and negative configurations that possibly impact business alignment with RPA. Research limitations/implications There are some human instincts during conditions dichotomization and limited number of cases. Practical implications The findings can be used to guide practice application in real industry. Originality/value This paper adopted crisp-set qualitative comparative analysis to find condition configurations for alignment of business and RPA for more generalization.


2019 ◽  
Vol 23 (6) ◽  
pp. 38-40
Author(s):  
A.V. Vasilyev

Results of ecological monitoring of air pollution in conditions of big industrial town on the example of Togliatti town are submitted. On the basis of measurements and calculations results of comparative analysis of negative impact of industrial air pollutions and exhaust gases of automobile transport to the state of atmosphere of Togliatti town was carried out. In total results of researches are allowing to conclude that the main source of air pollution is automobile transport.


2021 ◽  
Vol 3 (163) ◽  
pp. 35-38
Author(s):  
O. Afanasyev ◽  
S. Nesterenko ◽  
Y. Radzinska ◽  
K. Dolia

Society's needs in forest resources are due primarily to protective functions, and secondly to water protection, sanitation and health functions. Forests perform this or that function depending on their location, the area of the territory on which the forests are located and the composition. The article considers the problems of rational use and protection of forest lands. It is determined that the negative impact on forest land is due to intensive use and negative dynamics of the ecological state, as a consequence of improper land use and the impressive scale of deforestation. Industrial production, radiation pollution as a result of the accident at the Chernobyl nuclear power plant are the causes of deforestation. It is noted that in accordance with the Constitutions of Ukraine, forests are objects of property rights of the Ukrainian people, but due to mass deforestation, citizens are gradually losing the right to use them. It is noted that the protection and protection of forestry lands in general and forests in particular should be provided in accordance with existing legislation through the implementation of a set of measures, both traditional and new. The use of forests should be carried out exclusively in the order of general and special use in accordance with Art. 66, 67 of the Forest Code of Ukraine. It is proposed to strengthen control over compliance with current legislation in the field of protection of forestry lands and forests and control over land use. Reforestation is carried out on the sites of the felled forest. As part of the implementation of the commitments to achieve zero levels of soil degradation, develop an effective action program to preserve the country's forest resources.


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