Accounting for a System Breakdown

2020 ◽  
pp. 221-248
Author(s):  
Dennis W. Tafoya
Keyword(s):  
System Breakdown

Optimal Failure-Finding Intervals for Heat Shields in a Gas Turbine Combustion Chamber Using a Multicriteria Approach

2015 ◽  
Vol 137 (7) ◽  
Author(s):  
Alejandro Martínez ◽  
Gloria Lara ◽  
Rodrigo Pascual ◽  
Enrique López Droguett
Keyword(s):  
Combustion Chamber ◽  
Risk Level ◽  
Second Stage ◽  
Heat Shields ◽  
Potential Failure ◽  
System Breakdown ◽  
Novel Strategy ◽  
Two Stages ◽  
Risk And Reliability Analysis ◽  
Multicriteria Methodology

When a component, as heat shields, degrade, two stages can be distinguished. First, a potential failure appears, which could evolve to the second stage and become a functional failure. The time between these two stages is called delay-time, which has been widely studied in literature to determine when to inspect to avoid breakdown. These studies have shown only single analysis criteria to find failure finding interval (FFI). In order to overcome this limitation, we developed a novel strategy to apply multicriteria methodology to optimize FFI. Our approach considers availability, system breakdown risk and reliability analysis from a systemic perspective, studying heat shields as groups, according to their location in the combustion chamber, regardless of age defect. Hence, it is not necessary to check every one of the shields. Our results show an optimal FFI policy subject to a determined breakdown risk level. This analysis may be adaptable to other components that can be grouped together.

The Empirical Analysis of Cloud Computing Services among the Hungarian Enterprises

2016 ◽  
pp. 1162-1190
Author(s):  
Peter Sasvari ◽  
Zoltán Nagymate
Keyword(s):  
Cloud Computing ◽  
Information Flow ◽  
Data Security ◽  
Basic Concept ◽  
Remote Access ◽  
Security Issues ◽  
Computing Services ◽  
Cloud Computing Services ◽  
System Breakdown ◽  
The Empirical Analysis

Innovation capability has increasingly been searched by the ICT sector in cloud computing applications recently. This chapter describes the economic potentials of cloud computing and explores the characteristics of its usage among Hungarian enterprises. Although enterprises are aware of the basic concept of cloud computing, they have concerns about its application mainly due to data security issues and the lack of education. The chance of using cloud computing services is mainly facilitated by the creation of easier application and consultation would positively affect their usage. According to microenterprises and corporations, faster information flow and remote access are the key benefits of cloud usage. In the case of small-sized enterprises, the two main advantages are easier system recoverability and a higher level of mobility in case of a system breakdown. For the medium-sized enterprises, remote access and greater data security were the key benefits of using cloud computing services in 2014.

Scenario Analysis of Petrochemical Worker Injuries

1986 ◽  
Vol 30 (10) ◽  
pp. 998-998
Author(s):  
John K. Schmidt
Keyword(s):  
Intervention Development ◽  
Information Management System ◽  
System Operation ◽  
Chemical Release ◽  
Petrochemical Worker ◽  
System Breakdown ◽  
Analysis System ◽  
Traditional Approaches ◽  
Policy Problems ◽  
Interface Movement

More traditional approaches to accident reporting and analysis have received much critisism in recent years. The dispute apparently lies in their inability to facilitate intervention development due to a primary non-ergonomic orientation as well as limited suitability as an information management system. Laughery, Petree, Schmidt, Schwartz, Walsh and Imig (1983) in an effort to address these issues adopted the human factors based scenario and analytic technique developed by Drury and Brill (1983) and devised a accident coding and analysis system. In an study of 1,694 operator cases taken over a three year period at a petrochemical facility in the Houston, TX area, five separate accident patterns accounting for 80% of all the reported cases were found. The scenarios are as follows: 1) muscular/skeletal strain in system operation. 2) chemical release due to system breakdown. 3) obstruction in the workspace. 4) unsolicited interface movement during system operation. 5) poor footing in the workspace. A closer analysis of each scenario revealed apparent design flaws and managerial policy problems, that if corrected would reduce incident numbers significantly.

Multilayer Graphene-Based Carbon Interconnect

2012 ◽  
Vol 1407 ◽  
Author(s):  
Tianhua Yu ◽  
Edwin Kim ◽  
Nikhil Jain ◽  
Bin Yu
Keyword(s):  
Performance Metrics ◽  
Monolayer Graphene ◽  
Multilayer Graphene ◽  
Large Area ◽  
Electrical Stress ◽  
Oxygen Plasma Etching ◽  
Doping Technique ◽  
System Breakdown ◽  
Grown Graphene ◽  
On Chip

ABSTRACT3D stacked (or uncorrelated) multilayer graphene (s-MLG) is investigated as a potential material platform for carbon-based on-chip interconnects. S-MLG samples are prepared by repeatedly transferring and stacking the large-area CVD-grown graphene monolayers, followed by wire patterning and oxygen plasma etching of graphene. We observed superior wire conduction of s-MLG over that of monolayer graphene or ABAB-stacked multilayer graphene. Further reduction of s-MLG resistivity is anticipated with increasing number of stacked layers. Electrical stress-induced doping technique is used to engineer the Dirac point, as well as to reduce graphene-to-metal contact resistance, improving the overall performance metrics of the s-MLG system. Breakdown experiments show that the current-carrying capacity of s-MLG is significantly enhanced as compared with that of monolayer graphene.

scholarly journals Two server queues with system breakdown

2019 ◽  
Author(s):  
R. Mahalakshmi ◽  
R. Kalyanaraman
Keyword(s):  
System Breakdown

Scheduling spares with exponential lifetimes in a two-component parallel system

1980 ◽  
Vol 17 (4) ◽  
pp. 1025-1032 ◽  
Author(s):  
Michael Pinedo
Keyword(s):  
Parallel System ◽  
Two Component ◽  
System Breakdown ◽  
Component Parallel

Consider a two-component parallel system. There is a stockpile of n spares, spare i having lifetime Xi, exponentially distributed with rate µi. The system breaks down when neither component functions. Every time a spare expires it has to be replaced, to avoid system breakdown. We investigate the policies which maximize the expected lifetime of the system using these n spares.

Contradictions, Law, and State Socialism

2000 ◽  
Vol 25 (04) ◽  
pp. 1021-1048 ◽  
Author(s):  
Joachim J. Savelsberg
Keyword(s):  
The State ◽  
Economic Behavior ◽  
State Socialism ◽  
Comprehensive Planning ◽  
Legal Control ◽  
Total Control ◽  
System Breakdown ◽  
Relationship Of ◽  
Sense Of Justice ◽  
The Relationship

The relationship of law to antagonisms and contradictions within state socialism is explored from a Weberian and a Marxian perspective. Examining legislation, court decision making, legal control of economic behavior, and law enforcement reveals contradictions between (I) a radical participatory ideology versus muted or extinct civil society; (2) the ideology of comprehensive planning versus the impotence of law; (3) strategies aiming at total control of public life versus the emergence of a niche society outside the reach of the state; (4) regulatory norms versus the functional necessity of norm-breaking behavior; (5) reliance on a revolutionary sense of justice versus the cultivation of “doublethought”; (6) a program of total control of economic behavior versus the emergence of deviant, even criminal, forms of organization to fulfill functionally necessary but ideologically unapproved economic tasks; and finally, (7) two distinct practices of law, responsive or postliberal versus repressive. Yet, contradictions typically did not lead through conflict to subsequent reform during the state socialist era, as conflicts were repressed. When reforms were attempted, they furthered conflict and system breakdown.

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