scholarly journals CONCEPTUAL PROVISIONS FOR PREDICTION OF STATE AVIATION AIRCRAFT NO-FAILURE INDICATORS

2021 ◽  
pp. 13-22
Author(s):  
V. Golub ◽  
V. Bashynskyi ◽  
O. Bursala ◽  
R. Kholodnyi ◽  
A. Ternovskoy
Keyword(s):  
Flow Parameter ◽  
Safety Performance ◽  
Acceptable Level ◽  
Flight Safety ◽  
Reliable Operation ◽  
Conceptual Approach ◽  
Combined Model ◽  
Level Indicator ◽  
Performance Predictions ◽  
Operational Data

A conceptual approach to predicting of aircraft no-failure indicators during operational use is proposed. This approach is based on the use of methods of statistical analysis of operational data for a certain period of time. The results of predicting the failure flow parameter using a combined model of acceptable level and their standard deviation are presented. The results of predicting can be used to control the reliability (no-failure operation) of aircraft equipment in order to make grounded decisions about the continued operation of their equipment beyond the established life service. In order to create highly reliable aircraft it is necessary to predict failure rates, which involves the establishment of their range and quantitative values. To predict the thresholds of failure of the aircraft, it is advisable to use the following interval indicators of reliability: Ricao “accident level” indicator, which takes into account the number of flight failures detected in 100 hours and actually determines the dynamics of changes in the level of flight safety; “failure flow parameter, ω (t)”, which takes into account the total number of failures per hour of flight and determines the dynamics of changes in the level of operational The predicted value of the indicator of the “reliability upper control limit”, which determines the limit level of operatioanl reliability, at which further reliable operation of the aircraft is not desirable. According to the concept of “acceptable level of safety performance”, predictions of indicators for three levels of flight safety (acceptable, target, critical) are calculated, which need to be monitored in future periods of aircraft operation and make certain management decisions according to the proposed algorithm. The results of calculation for prediction indicators of reliability for specific types of aircraft according to their operation in the period 2017-2019 are presented.

scholarly journals THE CONCEPT OF EVALUATION OF MAXIMUM ACCEPTABLE RELIABILITY FACTORS OF STATE AVIATION HELICOPTERS

2021 ◽  
pp. 17-24
Author(s):  
V. Boiarov ◽  
А. Bursala ◽  
V. Golub ◽  
M. Zhdaniuk ◽  
O. Cherednikov
Keyword(s):  
Operational Reliability ◽  
Technical Condition ◽  
Flight Safety ◽  
Traffic Light ◽  
Conceptual Approach ◽  
Combined Model ◽  
Reliability Factor ◽  
Limit Values ◽  
The Military ◽  
Acceptable Reliability

The aim of the study is to develop and determine the maximum acceptable reliability factor of state aviation helicopters based on statistics on malfunctions that occur during the operation of the aviation materiel, taking into account the recommendations of ICAO. The paper defines the general criteria for calculating the limit values of reliability (operational reliability and flight safety). For their implementation it is necessary: to carry out constant monitoring of flight safety and the general reasons which cause emergence of malfunctions of helicopters, their systems and subsystems; to use the proposed combined model on the principle of "traffic light" to determine the level of flight safety indicators at their standard deviation when justifying decisions on the forecast for future periods of operation and establishing certain values of forecast indicators of the "upper control limit" of operational Based on the adopted conceptual approach to determining the dynamics of change in failure rates, quantitative criteria are developed. Proposals to determine the indicators of the technical condition during the military operation of the aircraft will maintain high combat readiness of state aviation at a given level, predict the need for maintenance and repair and predict the timing and direction of modernization of aircraft.

scholarly journals Operationalizing Household Food Security in Rural Nepal

1998 ◽  
Vol 19 (3) ◽  
pp. 210-222 ◽  
Author(s):  
Joel Gittelsohn ◽  
Sangeeta Mookherji ◽  
Gretel Pelto
Keyword(s):  
Food Security ◽  
Household Food Security ◽  
Conceptual Approach ◽  
Level Indicator ◽  
Food Stores ◽  
Household Level ◽  
Dietary Variety ◽  
Household Food ◽  
Future Supply ◽  
Rural Nepal

This paper operationalizes household food security and links it to household food consumption patterns in rural Nepal. Food security has long been used as a macro-level indicator of agricultural stability by both agricultural and economic researchers. However, little work has been done to operationalize it at the household level. We view household food security as reflecting three different dimensions: past food supply, current food stores, and future supply of food adequate to meet the needs of all household members. A key method is the construction of scales that capture these different aspects of household food security. When operationalized in this way, household food security is associated with increased consumption of non-staple foods in this setting. Past household food security is associated with increased frequency of meat consumption and increased variety of food consumed. Current household food security predicts a higher frequency of meat and dairy intake and greater dietary variety. Future household food security is associated with increased total dietary variety and future consumption of dairy products. We feel that this conceptual approach to assessing household food security, i.e., the use of scales to measure past, current, and future components of food security, can be used as a framework in other settings.

scholarly journals EFFECTS OF AIRLINES’ CABIN CREW TRAINING ON THEIR FLIGHT SAFETY PERFORMANCE

2013 ◽  
Vol 4 (1) ◽  
pp. 20-43
Author(s):  
Yu-Hern Chang ◽  
Meng-Yuan Liao ◽  
Chien-Chen Kuo
Keyword(s):  
Structural Equation ◽  
Emergency Evacuation ◽  
Assessment Method ◽  
Safety Performance ◽  
Operational Performance ◽  
Flight Safety ◽  
Training Performance ◽  
Cabin Crew ◽  
Skills Learning ◽  
The Impact

This study examines the impact of airlines’ cabin crew training on their flight safety performance, and evaluates the effectiveness of the cabin crew’s emergency evacuation training, in order to better understand whether their training performance affects airlines flight safety in practice. Kirkpatrick’s four-level training performance assessment method is used as the basis of this study, while factor analysis, t-test, ANOVA and SEM (Structural Equation Modelling) are used for data analysis. Most respondents agree that the training content can be clearly learned without language barriers if the airlines use domestic instructors. In addition, most respondents felt that airlines should improve the frequency with which they update the training material and that more practical drills and line training should be added to training syllabus, especially with regard to emergency evacuations. SEM method is used to assess the relationships among the training syllabus, skills learning, operational performance and flight safety performance. The results show that the training syllabus positively affects skills-learning, skills-learning positively affects operational performance and flight safety performance, and operational performance directly affects flight safety performance.

Enhancing the construction projects safety performance level to confront the civil engineering trades-related hazards

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ahmed Yousry Akal ◽  
Amr Metwally El-Kholy
Keyword(s):  
Construction Projects ◽  
Civil Engineering ◽  
Safety Management ◽  
Hazard Analysis ◽  
Performance Level ◽  
Safety Performance ◽  
Safety Level ◽  
Level Indicator ◽  
Content Type ◽  
Safety Indicator

PurposeThis work affords a practical checklist that specifies the civil engineering trades-related hazards and offers a safety indicator to identify the safety level of a construction project concerning the hazards of the civil engineering trades.Design/methodology/approachThe methodology depends on reviewing the archival works, visiting the construction sites, utilizing the direct observation and preliminary hazard analysis methods and conducting semistructured interviews to pinpoint and validate the checklist of the civil engineering trades-related hazards. Additionally, a questionnaire-based survey with the rank sum weight technique has been employed to assemble and analyze the data required to build the safety indicator.FindingsRelying upon the used methodology, 70 hazards under the trades of general environment, earth, demolition, excavation, concrete, dewatering, waterproofing insulation and scaffolding have been pinpointed and validated. This is in addition to the safety level indicator of the civil engineering trades-related hazards (SLICETH), which indicates high viability during its validation in five national and international projects.Originality/valueThe value of this work lies in its ability to tackle the gap existing in the safety management knowledge regarding the notion of the hazards of the civil engineering trades and their influences on the safety performance of the construction projects. As a result, it offers a complete knowledge to the academics and the practitioners for confronting the negative impacts of the civil engineering trades-related hazards. Consequently, it helps in enhancing the safety performance level in the sites of the construction projects.

Research on Reliability Analysis of Plane Power Supplying System Based Bayesian Fusion

2014 ◽  
Vol 651-653 ◽  
pp. 822-825
Author(s):  
Jiang Jun Xu ◽  
Zhi Jian Xiao
Keyword(s):  
Reliability Analysis ◽  
Power Distribution ◽  
Distribution System ◽  
Evaluation Model ◽  
Flight Safety ◽  
Matlab Simulation ◽  
Reliable Operation ◽  
Power Distribution System ◽  
Bayesian Fusion ◽  
Set Up

Reliable operation of the aircraft power distribution system is critical to the flight safety of a plane。In this paper,the reliability evaluation model of aircraft power supplying system based on Bayesian fusion is set up。 Calculating reliability indexes by using MATLAB simulation softwaer。Comparing with the traditional Bayes approach,the result shows the method is efficient。

Command and Control

2018 ◽  
Vol 8 (1) ◽  
pp. 1-10
Author(s):  
Stuart D. H. Beveridge ◽  
Simon T. Henderson ◽  
Wayne L. Martin ◽  
Joleah B. Lamb
Keyword(s):  
Air Transport ◽  
Flight Safety ◽  
Flight Crew ◽  
Systematic Review Methodology ◽  
Role Assignment ◽  
Performance Factors ◽  
Policy Review ◽  
Reported Effect ◽  
And Control ◽  
Research And Policy

Abstract. Compared with other team settings, flight crew in air transport present a unique situation where the leader or supervisor regularly engages in active control. When the captain is assigned cognitively demanding pilot flying duties, the subordinate and often less experienced first officer must perform equally crucial monitoring and support duties. Using a systematic review methodology, this study reviews the reported effect of crew role assignment on flight safety outcomes. Our review identified 18 relevant studies and suggests crew performance factors linked to flight safety are affected by crew role assignment. Findings suggest a greater number of inherent obstacles may exist for optimal crew performance with the captain as pilot flying, raising the need for further specific research and policy review in this area.

Financial decision makers' perceptions of safety performance, programs, and personnel

2008 ◽  
Author(s):  
Sarah DeArmond ◽  
Yueng-Hsiang Huang ◽  
Peter Chen ◽  
Theodore Courtney
Keyword(s):  
Safety Performance ◽  
Decision Makers ◽  
Financial Decision ◽  
Perceptions Of Safety

Performance Prediction of Asphalt Pavement Based on the Combined Model

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Wenwen Feng ◽  
Guanglai Jin ◽  
Haiting Liu ◽  
Zhixiang Zhang
Keyword(s):  
Performance Prediction ◽  
Asphalt Pavement ◽  
Combined Model
Sign in / Sign up

Export Citation Format

Share Document