scholarly journals Security monitoring of computerized boiler rooms with network access and risk assessment on a logicalprobabilistic model

2019 ◽  
Vol 15 (6) ◽  
pp. 80-91 ◽  
Author(s):  
M. V. Sheptunov
Keyword(s):  
Risk Assessment ◽  
Computer Network ◽  
Boiler House ◽  
Safety Monitoring ◽  
Network Access ◽  
Safe Operation ◽  
Security Monitoring ◽  
Emergency Situations ◽  
Boiler Room ◽  
Calculated Probability

We consider one of the existing technologies, scilicet of the multi-shift safety monitoring, which implies tracking of the integrity of the information system (IS) by periodically replacing each other operators in the interval between diagnostics of the system, in relation to computerized boiler-rooms with network access. Herein the IS of the boiler-house is taken into account as protected from dangerous software-engineering influences through the computer network only if to the beginning of the specified period of time the integrity of the system is ensured and throughout this set period the sources of danger do not penetrate the system (with a calculated probability). Here the operator of the boiler-room figures as an eventual link of the series of the controlled, including the program level, barriers for (external) network malefactor. For computerized boiler-houses, depending on the ratios for the duration of the operator’s work during each shift, the specified period of safe operation and the period between diagnostics, three variants are considered that are typical for this technology. The possibilities of applying the latter in the foreshortening of risk assessment of emergency situations (ES) within the previously developed by the author logical-probabilistic model for computerized boiler-houses are discussed.

Consideration of Non-stationarity in the Development of Emergency Situations for the Quantitative Risk Assessment of Accidents at Hazardous Production Facilities of Oil and Product Pipelines

2021 ◽  
pp. 89-96
Author(s):  
A.M. Sverchkov ◽  
Keyword(s):  
Risk Assessment ◽  
Fire Hazard ◽  
Ignition Time ◽  
Quantitative Risk Assessment ◽  
Risk Indicators ◽  
Oil Pipeline ◽  
Emergency Situations ◽  
External Conditions ◽  
Hazardous Production ◽  
Real Practice

It is proposed to use the new approach to assessing quantitative risk indicators. This approach allows to consider the temporal non-stationarity of the number of processes, including the development of an accident and the spatial movements of people. The greatest uncertainty in the risk analysis with an explosive and fire hazard component is not the frequency of initiating events used, but, for example, data on the probability of ignition. The range of variation of this probability is about two orders of magnitude (relatively speaking, from 1 % to 100 %), and the criteria and factors that determine the choice of this value are not always clearly defined. The paper proposes an approach that considers the probability of ignition as a dependence on the time that passed after the start of emergency depressurization. Knowing this dependence, it is possible to consider several scenarios with different ignition time after the start of the release and assign certain consequences and probabilities to each scenario. Moreover, it is possible for each single scenario on a specific piece of equipment (pipeline section) to obtain non-stationary, namely time-varying potential risk fields. The example of an accident on the oil pipeline is considered, the risk indicators of such an accident are calculated, it is shown that the risks can change over time, namely they are non-stationary characteristics. Further, this fact is transformed into the development of theoretical foundations for quantitative risk assessment, considering the non-stationarity of various processes occurring during emergency situations arising during the operation of equipment, individual behavior of people and changes in external conditions. The results obtained show the importance of considering the changes that occur during an emergency on the main oil and product pipelines. It is concluded that the proposed approach allows to reduce the conservatism of assessments provided by traditional methods. In real practice this approach can reasonably reduce the risk indicators by several times, sometimes by orders of magnitude.

An Overview of Statistical Methodologies for Safety Monitoring and Benefit-Risk Assessment

2021 ◽  
pp. 101-118
Author(s):  
William Wang ◽  
Ed Whalen ◽  
Melvin Munsaka ◽  
Judy X. Li
Keyword(s):  
Risk Assessment ◽  
Safety Monitoring ◽  
Benefit Risk Assessment

Risk Assessment of Relay Protection Setting Value in Power Plant

2013 ◽  
Vol 373-375 ◽  
pp. 1345-1348 ◽  
Author(s):  
Zong Jiang Mu ◽  
Yan Xu ◽  
Shao Bo Yan
Keyword(s):  
Risk Assessment ◽  
Power Plant ◽  
Potential Risk ◽  
Risk Evaluation ◽  
Evaluation Method ◽  
Relay Protection ◽  
Stable Operation ◽  
Protection Device ◽  
Safe Operation ◽  
Risk Assessment And Analysis

Power plant relay protection setting value of the hidden harm causes of relay protection device is not correct, safe and stable operation of the power plant. In this paper, from the angle of the safe operation of power plant, the hidden danger to plant with the protection setting is studied and then the risk evaluation method of power plant relay protection setting values of hidden trouble is proposed. From the power plant relay protection setting value considering two aspects of probability and consequences of potential outbreak of different values, value potential risk is considered, and of a certain power plant in Hubei was made the risk assessment and analysis, in order to verify the theoretical rationality and accuracy.

scholarly journals Wireless Network Traffic Analysis and Troubleshooting using Raspberry Pi

2018 ◽  
Vol 7 (2.15) ◽  
pp. 58
Author(s):  
Mohamad Nur Haziq Mohd Safri ◽  
Wan Nor Shuhadah Wan Nik ◽  
Zarina Mohamad ◽  
Mumtazimah Mohamad
Keyword(s):  
Wireless Network ◽  
Network Traffic ◽  
Computer Network ◽  
Low Cost ◽  
Access Point ◽  
Traffic Analysis ◽  
Raspberry Pi ◽  
Network Access ◽  
Actual Problem ◽  
Network Traffic Analysis

In the past five decades, computer network has kept up growing with the increases of its complexity. In such situation, the management, monitoring and maintenance of such computer network requires special attention to ensure optimal network access capability is achieved. Wireless network traffic analysis is a process of recording, studying and analyzing packets in wireless network for network performance analysis purposes. In some cases, the quality of network access performance can be very low without knowing the actual problem. Therefore, in this paper, the performance of wireless network traffic is proposed to be analyzed by using a Raspberry Pi which further able to send an alert to network admin to lessen the downtime. Raspberry Pi is a low cost, a small and portable size of a computer board that can be used to plug-in to monitor, keyboard, mouse, pen drive, etc. In this project, a MyTraceroute (MTR) program is installed on the Raspberry Pi to capture the IP of the Access Point (AP) and show packets loss percentage in the network. The results will be saved in the form of text file and sent to network admin by using email. The solution proposed in this paper is able to support solution to a problem on efficient monitoring, managing and maintaining wireless network traffics.    

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