Reliability analysis and performance optimisation of the serial process in refining system of a sugar plant

2017 ◽  
Vol 26 (2) ◽  
pp. 149 ◽  
Author(s):  
Anil Kr. Aggarwal ◽  
Sanjeev Kumar ◽  
Vikram Singh
Keyword(s):  
Reliability Analysis ◽  
Sugar Plant ◽  
Serial Process ◽  
And Performance

Reliability Analysis of the Suspension Device in the Refit of a Tracked Vehicle

2014 ◽  
Vol 945-949 ◽  
pp. 1129-1134 ◽  
Author(s):  
Wei Sun ◽  
Bing Ma ◽  
Jin Ma ◽  
Yao Zhao
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Stress State ◽  
Reliability Analysis ◽  
Equilibrium Position ◽  
Performance Testing ◽  
Static Equilibrium ◽  
Tracked Vehicles ◽  
And Performance ◽  
Torsion Bar

To improve the flexibility performance of tracked vehicles, lots of jobs has been done in the refit of driveline. Therefore, tough risks are transferred to the strength and fatigue life of suspension device. Through analyzing the effect of driveline refit to the performance of suspension device, a scheme that enhancing the stiffness of the torsion bar is proposed. By using the MSC.Patran/Nastran software, the model of suspension device is constructed, via the simulation of the stress state and fatigue strength that is loaded on the main suspension parts at the static equilibrium position and the maximum stroke position of equilibrium elbow, and performance testing on actual roads, this scheme is considered to be reliable.

scholarly journals Spanish Adaptation of Motivational Climate in Education Scale with University Students

2020 ◽  
Vol 10 (6) ◽  
pp. 157
Author(s):  
Antonio Granero-Gallegos ◽  
María Carrasco-Poyatos
Keyword(s):  
University Students ◽  
Reliability Analysis ◽  
Goodness Of Fit ◽  
Discriminant Validity ◽  
Temporal Stability ◽  
Motivational Climate ◽  
University Education ◽  
Equation Modeling ◽  
And Performance ◽  
Nomological Validity

The aim of this study was to provide evidence of the validity and reliability of the dimensionality of the Spanish adaptation of two correlated subscales to assess motivational climate in the university education context: Mastery motivational climate and performance motivational climate. Two different studies with cross-sectional design and different samples of university students were used to accomplish this research (Study 1: 181 students, mean age = 20.83, SD = 1.76; Study 2: 354 students, mean age = 21.84; SD = 1.98). In Study 1, Exploratory Structural Equation Modeling, Confirmatory Factor Analysis (CFA), and reliability analysis of the scale were conducted. In Study 2, CFA, reliability analysis, discriminant validity, temporal stability, factorial invariance across gender, and nomological validity were managed through a regression model measuring the relationships between democratic and autocratic behavior, mastery climate, and performance climate. The final version of the Motivational Climate in Education Scale showed acceptable goodness of fit and values of discriminant validity, reliability, temporal stability, and invariance across gender. According to its nomological validity, democratic behavior was shown to be a statistically significant predictor of mastery climate, and the teacher’s autocratic behavior was shown to be a statistically significant predictor of performance climate. This scale is a valid and reliable instrument to assess mastery climate and performance climate in the Spanish university educational context.

Developing the foundations of a cognition-based human reliability analysis model via mapping task types and performance-influencing factors: Application to radiotherapy

2017 ◽  
Vol 232 (1) ◽  
pp. 3-37 ◽  
Author(s):  
Dhruv Pandya ◽  
Luca Podofillini ◽  
Frank Emert ◽  
Antony J Lomax ◽  
Vinh N Dang
Keyword(s):  
Reliability Analysis ◽  
Influencing Factors ◽  
Factor Structure ◽  
Influencing Factor ◽  
Task Type ◽  
Analysis Method ◽  
Human Reliability ◽  
Human Reliability Analysis ◽  
And Performance ◽  
Paul Scherrer

Most human reliability analysis methods have been developed for nuclear power plant applications; this challenges the application of the available techniques to other domains. Indeed, for application to a specific domain, a human reliability analysis method should address the relevant tasks and performance conditions. The aim of this article is to propose a methodology to develop a generic task type–performance-influencing factor structure, specific for application to a domain of interest and directly linked to an underlying cognitive framework of literature. The structure provides the foundation of a human reliability analysis method built on the generic task type concept; it identifies the sector-specific performance-influencing factor effects on the failure probability that the method needs to represent and quantify for each generic task type. The methodology is intended to support a systematic and traceable process to develop the generic task type–performance-influencing factor structure, to ease the review of the process and of its results and, in case, identify and implement changes to the structure. The proposed methodology is applied to the radiotherapy domain allowing the development of sector-specific taxonomies of representative critical tasks, their failure modes, underlying cognitive failure mechanism, and influencing performance-influencing factors. This is part of a broader activity carried out by the Risk and Human Reliability Group at the Paul Scherrer Institute of Switzerland to develop a human reliability analysis method, specific for the radiotherapy domain. The activity is conducted in close cooperation with Paul Scherrer Institute’s Center for Proton Therapy, where a first application of the method is foreseen.

Maintenance Plan for a Fleet of Rotary Drill Rigs/Harmonogram Utrzymania I Konserwacji Floty Obrotowych Urządzeń Wiertniczych

2014 ◽  
Vol 59 (2) ◽  
pp. 441-453 ◽  
Author(s):  
Mohammad Javad Rahimdel ◽  
Mohammad Ataei ◽  
Reza Khalokakaei ◽  
Seyed Hadi Hoseinie
Keyword(s):  
Reliability Analysis ◽  
Preventive Maintenance ◽  
Performance Data ◽  
Reliability Modeling ◽  
Failure Data ◽  
Sarcheshmeh Copper Mine ◽  
Maintenance Program ◽  
And Performance ◽  
Drilling Rigs ◽  
Maintenance Plan

Abstract In this paper a basic methodology was used for the reliability modeling and developing a maintenance program for a fleet of four drilling rigs. Failure and performance data was collected from Sarcheshmeh Copper Mine in Iran for a two-year period. Then the available data was classified and analyzed and reliability of all subsystems and whole rigs were modeled and studied. The failure data showed that, in all rigs, electrical, hydraulic and drilling systems are the most frequent failing subsystems of the machine. The reliability analysis showed that transmission system is the most reliable subsystem in all studied rigs. In order to calculate the reliability of whole fleet, it was assumed that operation of at least two drilling rigs is essential for satisfying the production goals. Therefore, probabilistic possibility of all fleet’s states were calculated. In this paper, 80% is selected as the desired level of reliability for developing of preventive maintenance program for each subsystem of the drilling rigs. Finally, the practical approaches were suggested for improving the maintenance operation and productivity of the studied fleet.

scholarly journals Level of Learning Organization Practices in Two Primary Schools in the Central Melaka District, Melaka

2021 ◽  
Vol 18 (1) ◽  
pp. 73
Author(s):  
Nor Hafiza Ahmad ◽  
Norliah Kudus ◽  
Sharifah Sakinah Syed Ahmad
Keyword(s):  
Staff Development ◽  
Social Science ◽  
Reliability Analysis ◽  
Learning Organization ◽  
Primary Schools ◽  
Descriptive Analysis ◽  
Study Data ◽  
Average Grade ◽  
Preliminary Study ◽  
And Performance

This preliminary study was conducted to see the level of learning organization (LO) practice in two primary schools in the district of Melaka Tengah, Melaka. Both schools were selected based on Ujian Pencapaian Sekolah Rendah (UPSR) 2019 School Average Grade (GPS). The questionnaire instrument used in this study was modified from the Learning Organization Practices Profile (LOPP) instrument developed by O'Brien, 1994 and conducted on 60 respondents from two different schools. The overall questionnaire reliability analysis gave a Cronbach’s alpha scale of 0.78. Study data were analyzed using Statistical Package for Social Science (SPSS) For Windows 25 program with descriptive analysis. The findings of this study show that the most dominant LO practice is the system and structure aspects of work, followed by staff development and performance and the lowest is the leadership aspect. The results of the overall study show that the level of LO practice in the schools studied is still at a weak level.

Sign in / Sign up

Export Citation Format

Share Document