APPLICATION OF FUZZY FMEA TO PERFORM AN EXTENSIVE RISK ANALYSIS IN MARITIME TRANSPORTATION ENGINEERING

Author(s):  
E Akyuz

The nature of maritime transportation involves numerous hazards, which can lead to serious consequences for human life, marine environment and ship. Therefore, achieving a high level of safety is recognised as paramount in maritime industry (Akyuz, 2016). In order to achieve this purpose, this paper prompts a fuzzy based Failure Mode and Effects analysis (FMEA) to perform an extensive risk analysis in the maritime transportation industry. The method has capable of identifying potential failures and calculating risk priority number (RPN) by capturing nonlinear casual relationships between the failures. The proposed method is applied to hatch cover failures in operational aspects in bulk carrier ships since potential failures of hydraulic hatch covers have serious concerns for ship owners. Besides its theoretical insight, the paper has practical benefits to ship owners, superintendents as well as safety professionals by identifying potential failure and offering early corrective actions.

2017 ◽  
Vol Vol 159 (A1) ◽  
Author(s):  
E Akyuz

The nature of maritime transportation involves numerous hazards, which can lead to serious consequences for human life, marine environment and ship. Therefore, achieving a high level of safety is recognised as paramount in maritime industry (Akyuz, 2016). In order to achieve this purpose, this paper prompts a fuzzy based Failure Mode and Effects analysis (FMEA) to perform an extensive risk analysis in the maritime transportation industry. The method has capable of identifying potential failures and calculating risk priority number (RPN) by capturing nonlinear casual relationships between the failures. The proposed method is applied to hatch cover failures in operational aspects in bulk carrier ships since potential failures of hydraulic hatch covers have serious concerns for ship owners. Besides its theoretical insight, the paper has practical benefits to ship owners, superintendents as well as safety professionals by identifying potential failure and offering early corrective actions.


2017 ◽  
Vol 7 (1) ◽  
pp. 1377-1381
Author(s):  
M. Mousavi ◽  
I. Ghazi ◽  
B. Omaraee

Risk assessment is a well-developed field which many operators are currently applying to improve their operations and reduce their risk exposure. This paper is intended to provide an overview of the risk assessment for mariners in the Maritime transportation. The risks addressed are primarily those affecting the safety of a vessel, facility or operation. The concept of risk is defined, and the methods available to assess the risks associated with an operation are described. Regulatory requirements that have prompted the development of modern risk assessment practices are described, and future regulatory trends are discussed. There are many different analysis techniques and models that have been developed to aid in conducting risk assessments. A key to any successful risk analysis is choosing the right method (or combination of methods) for the situation at hand. This is achieved through critical analysis of the available data concerning marine crises. This paper provides a brief introduction to some of the analysis methods available and suggests risk analysis approaches to support different types of decision making within the maritime transportation to cope with crises. Finally, as awareness of risk assessment increases, the benefits which can be realized through its application will continue to increase. Organizations in both the public and the private sector are becoming more and more familiar with the benefits associated with risk-based approaches to managing safety and consequently reducing crisis in maritime transportation.


1996 ◽  
Vol 451 ◽  
Author(s):  
Guen Nakayama ◽  
Yuichi Fukaya ◽  
Masatsune Akashi

ABSTRACTIn the scheme for geological disposal of high level radioactive nuclear wastes, the burial pit is to be isolated from the sphere of human life by a multiple-barrier system, which consists of an artificial barrier, composed of a canister, an overpack and a bentonite cushioning layer, and a natural barrier, which is essentially the bedrock. As the greatest as well as essentially the sole detriment to its integrity would be corrosion by groundwater. The groundwater comes to it seeping through the bentonite zone, thereby attaining conceivably the pH of transition from general corrosion to passivity, pHd, the behaviors of mild steel in such a groundwater environment have been examined. It has been shown that the pHd is lowered (enlargement of the passivity domain) with rising temperature and carbonate-bicarbonate concentration, while it is raised (enlargement of the general corrosion region) with increasing concentrations of chloride and sulfate ions.


2018 ◽  
Vol 35 (7) ◽  
pp. 1459-1476 ◽  
Author(s):  
Dilbagh Panchal ◽  
Sachin Kumar Mangla ◽  
Mohit Tyagi ◽  
Mangey Ram

Purpose The purpose of this paper is to develop a fuzzy methodology approaches based framework for carrying the risk analysis of a real industrial system of a urea fertilizer industry located in northern part of India. Design/methodology/approach Petri Net approach was applied for representing the series-parallel arrangement of the considered system. Various failure causes related to different subsystems or equipment of the considered system were listed under FMEA approach and their Risk Priority Number was tabulated. Further, to overcome the drawbacks of traditional FMEA approach in risk ranking fuzzy FMEA and grey relation analysis (GRA) approaches were applied within traditional FMEA approach and the ranking results were compared for better and effective decision making of risky components. Findings The proposed framework has overcome the drawbacks of tradition FMEA approach in an effective and efficient manner. Causes AC7, CL3, ST2, DR3 and NR3 of centrifugal compressor, hot heat exchanger, ammonia convertor reactor, cold condenser and ammonia separator have been identified as the most critical failure causes of the considered system. Originality/value The proposed framework has been tested with its application on an ammonia synthesis system of the considered process industry. The risk ranking results would be highly useful in developing a planned maintenance policy for the considered system which further results in improving the system availability.


Author(s):  
Marta Makara-Studzińska ◽  
Kornelia Zaręba ◽  
Natalia Kawa ◽  
Dorota Matuszyk

SARS-CoV-2 coronavirus emerged in the world at the end of 2019. The introduction of a number of restrictions had a significant effect on numerous aspects of human life with particular influence being exerted on pregnant women and their sense of security. The study aimed to assess the level of anxiety and its main determinants in women in the third trimester of pregnancy during the coronavirus pandemic. The study technique included the present purposely designed questionnaire, Labor Anxiety Questionnaire (KLPII), and the State-Trait Anxiety Inventory (STAI). The study was conducted in a group of 315 women in the third trimester of pregnancy. A total of 258 women (81.9%) completed the questionnaire in May 2020, and 57 of them (18.1%) completed it in October 2020. The overall analysis of the Labor Anxiety Questionnaire and the STAI inventory revealed a high level of anxiety, particularly situational anxiety, in pregnant women during the SARS-CoV-2 pandemic. The age and financial status of the women were the factors which contributed to the intensification of tokophobia. Women interviewed in October 2020 were characterized by higher tokophobia levels compared to the respondents included in May 2020. It seems justified to in-crease the vigilance in the diagnostics of possible mental disorders in the perinatal period during pandemic.


2021 ◽  
pp. 114-124
Author(s):  
Татьяна Вячеславовна Кошкина

Показано, что высокий уровень физической подготовленности студентов обеспечит их способность к качественному выполнению будущей трудовой деятельности. Для оценки уровня физической подготовленности студентов в рамках их физического воспитания в вузе возможно использовать нормативы комплекса «Готов к труду и обороне» (ГТО) как универсального оценочного механизма, позволяющего выделять наиболее физически развитых представителей данного поколения. С этой целью определено соответствие уровня физической подготовленности современных студентов не физкультурных специальностей с нормами комплекса ГТО. Выявлены пути совершенствования физической подготовки студентов в условиях современного вуза. Материалом для исследования послужили теоретические и эмпирические данные, полученные на основе использования методов теоретического анализа специальной литературы и передового педагогического опыта, педагогического эксперимента, контрольных испытаний, математико-статистических методов обработки и анализа данных. Результаты исследования подтверждают, что в настоящее время уровень физической подготовленности студентов не всегда соответствует требованиям норм ГТО. Данный факт был доказан экспериментально на базе Марийского государственного университета. Требуется дополнительная работа по физической подготовке студентов. С этой целью сформулированы методические рекомендации по совершенствованию физической подготовки студентов в соответствии с нормами ГТО. Теоретически обоснована и эмпирически доказана целесообразность использования нормативов ГТО в качестве системы оценивания физической подготовленности студентов. Сформулированы методические рекомендации по повышению уровня физической подготовленности студентов в соответствии с нормативами комплекса ГТО. The importance of physical culture and sports in human life, associated with maintaining the health of the nation as a whole and ensuring individual health and working capacity of the individual in particular, is realized in the form of physical education carried out in educational institutions, including universities. A high level of physical fitness of students will ensure their ability to perform high-quality future work activities. In order to assess the level of physical fitness of students within the framework of their physical education at the university, it is possible to use the standards of the GTO complex as a universal evaluation mechanism that allows identifying the most physically developed representatives of this generation. The purpose is to determine the compliance of the level of physical fitness of modern students of non-physical education specialties with the norms of the GTO complex and to identify on this basis ways to improve the physical training of students in the conditions of a modern university. The materials for the study were theoretical and empirical data obtained on the basis of the use of methods of theoretical analysis of special literature and advanced pedagogical experience, pedagogical experiment, control tests, mathematical and statistical methods of data processing and analysis. When studying the advanced pedagogical experience accumulated in our country since the introduction of the revived GTO standards in 2014, reflected in relevant publications, as well as scientific and methodological literature in the field of physical education, it was shown that at present the level of physical fitness of students does not always meet the requirements of GTO standards. This fact was proved experimentally, by conducting control tests on the basis of the Mari State University. This indicated that additional work is required on the physical training of students, and those indicators of physical fitness of students that require the greatest development were also identified. Methodological recommendations were formulated to improve the physical training of students in accordance with the standards of the GTO. The expediency of using the GTO standards as a system for assessing students’ physical fitness was theoretically justified and empirically proved.


2021 ◽  
Vol 18 (2) ◽  
pp. 143
Author(s):  
Annisa Mu'awanah Sukmawati ◽  
Puji Utomo

Bantul Regency is a district in Yogyakarta Province which has geographic, geological, hydrological, and demographic characteristics that are likely to cause drought. Drought event in Bantul Regency may have significant impacts on various aspects in line with the characteristics of drought impacts which are complex and cross-sectoral. This study addresses to analyze the level of risk of drought with observation units in 75 villages in the Bantul Regency. The risk analysis was carried out by comparing the time period of the 10 years, i.e. 2008 and 2018 to observe the shift of risk areas of drought in Bantul Regency. The research was conducted using quantitative research methods with quantitative descriptive and mapping analysis. The analysis steps are drought hazard analysis, vulnerability analysis, and drought risk analysis. The analysis shows that during the last 10 years, Kabupaten Bantul has been experiencing an increasing number of villages classified as high risk of drought, both in urban and rural areas. In 2008 there were 15 villages (20%) and increased to 21 villages (28%) in 2018 that were classified as very very high level. Meanwhile, in 2008 there were 30 villages (40%) in 2008 and increased to 32 villages (42.7%) in 2018 that were classified as very high level. It caused by the increasing probability of drought as well as vulnerability. The analysis results can be used as input for stakeholders to take mitigation and anticipation actions to reduce the impact of drought based on the spatial characteristics of the risk areas.


Author(s):  
Ewa Bonusiak ◽  

Legal sciences, raising food safety as the subject of research, focus mainly on striving to ensure sufficiently effective legal regulations and the system of bodies controlling and supervising the food market that determine the correct health quality of food. One such body is the Veterinary Inspection. And while it focuses in its tasks mainly on the protection of animal health, it directly and indirectly affects the maintenance of food health requirements. Supervision exercised by the said Inspection plays an important role in ensuring a high level of protection of human life and health, and also protects the economic interests of the consumer. These two goals are basic. Additional objectives are protection of the reliability of commercial transactions, ensuring the free movement of food in the European Union, protection of animal health and living conditions and protection of the environment. They are of particular importance for determining acceptable limits of competences that can be entrusted to public administration bodies, including the said Inspection. The article presents the activities of the Veterinary Inspection to protect food safety and selected executive forms that it uses for this purpose. These types of entities are equipped with such forms of activity because they fulfill a protective function in the public administration system. However, this function implies the obligation to protect many different values desired individually, as well as maintain (ensure) objectively desired states of affairs, phenomena and processes.


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