Systematically investigating human and organisational factors in complex socio-technical systems by using the “SAfety FRactal ANalysis” method

2022 ◽  
Vol 100 ◽  
pp. 103662
Author(s):  
Bart Accou ◽  
Fabrice Carpinelli
Keyword(s):  
Fractal Analysis ◽  
Analysis Method ◽  
Technical Systems ◽  
Organisational Factors

Analysis method for revealing human and organisational factors of occupational accidents with movement disturbance (OAMDs)

Ergonomics ◽  
2020 ◽  
Vol 64 (1) ◽  
pp. 113-128
Author(s):  
Sylvie Leclercq ◽  
Gaël Morel ◽  
Christine Chauvin ◽  
Laurent Claudon
Keyword(s):  
Occupational Accidents ◽  
Analysis Method ◽  
Organisational Factors

scholarly journals ASSESSMENT OF URBAN SPRAWL USING SHANNON’S ENTROPY AND FRACTAL ANALYSIS: A CASE STUDY OF ATAKUM, ILKADIM AND CANIK (SAMSUN, TURKEY)

2017 ◽  
Vol 25 (3) ◽  
pp. 264-276 ◽  
Author(s):  
Derya OZTURK
Keyword(s):  
Urban Sprawl ◽  
Fractal Analysis ◽  
Urban Form ◽  
Entropy Method ◽  
Shannon’S Entropy ◽  
Analysis Method ◽  
Maximum Likelihood Classification ◽  
Shannon's Entropy ◽  
Box Counting

Urban sprawl is one of the most important problems in urban development due to its negative environmental and societal impacts. Therefore, the spatial pattern of urban growth should be accurately analyzed and well understood for effective urban planning. This paper focuses on urban sprawl analysis in the Atakum, Ilkadim and Canik districts of Samsun, Turkey. In this study, urban sprawl was examined over a period of 24 years using Shannon's entropy and fractal analysis based on remote sensing and Geographic Information System (GIS). The built-up areas in 1989, 2000 and 2013 were extracted from Landsat TM/ETM+/OLI images using the maximum likelihood classification method, and urban form changes in the 1989–2013 period were investigated. The Shannon's entropy method was used to determine the degree of urban sprawl, and a fractal analysis method based on box counting was used to characterize the urban sprawl. The results show that Atakum, Ilkadim and Canik experienced important changes and have considerable sprawl and complex characteristics now. The study also revealed that there is no monotonic relationship between Shannon's entropy and fractal dimension.

An integrated methodology for the prognosis of ballast degradation in railway turnouts

2019 ◽  
Vol 234 (8) ◽  
pp. 908-924
Author(s):  
Seyed Mohammad Asadzadeh ◽  
Roberto Galeazzi
Keyword(s):  
Bayesian Inference ◽  
Fractal Analysis ◽  
Degradation Rate ◽  
Analysis Method ◽  
Degradation Model ◽  
Track Geometry ◽  
Integrated Methodology ◽  
Railway Infrastructure ◽  
Rate Of Increase ◽  
Track Irregularities

This study proposes an integrated methodology for modelling and predicting ballast degradation in turnouts by exploiting loaded track geometry data. The rate of increase in track irregularities with respect to the cumulative loading of the track is the index of ballast degradation to be predicted. The methodology combines the fractal analysis method with probabilistic modeling and Bayesian inference to design a prognostic tool that forecasts the expected ballast degradation rate over a period of three months. The foundation of the proposed method is a universal degradation model for the ballast in turnouts, which fuses technological, operational, and environmental information to prognose the rate of ballast deterioration. The methodology has been verified on 15 different turnouts of the Danish railway infrastructure.

scholarly journals Review about the Application of Fractal Theory in the Research of Packaging Materials

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 860
Author(s):  
Qingshan Duan ◽  
Jiejie An ◽  
Hanling Mao ◽  
Dongwu Liang ◽  
Hao Li ◽  
...  
Keyword(s):  
Fractal Dimension ◽  
Fractal Analysis ◽  
Fractal Theory ◽  
Inorganic Materials ◽  
Packaging Materials ◽  
Analysis Method ◽  
Characteristic Parameters ◽  
Fractal Characteristic ◽  
Fractal Characteristics ◽  
The Relationship

The work is intended to summarize the recent progress in the work of fractal theory in packaging material to provide important insights into applied research on fractal in packaging materials. The fractal analysis methods employed for inorganic materials such as metal alloys and ceramics, polymers, and their composites are reviewed from the aspects of fractal feature extraction and fractal dimension calculation methods. Through the fractal dimension of packaging materials and the fractal in their preparation process, the relationship between the fractal characteristic parameters and the properties of packaging materials is discussed. The fractal analysis method can qualitatively and quantitatively characterize the fractal characteristics, microstructure, and properties of a large number of various types of packaging materials. The method of using fractal theory to probe the preparation and properties of packaging materials is universal; the relationship between the properties of packaging materials and fractal dimension will be a critical trend of fractal theory in the research on properties of packaging materials.

A Three-Dimensional Fractal Analysis Method for Ground Monocrystal Sapphire Surface

2014 ◽  
Vol 1017 ◽  
pp. 187-192
Author(s):  
Qiu Yan Wang ◽  
Zhi Qiang Liang ◽  
Xi Bin Wang ◽  
Wen Xiang Zhao ◽  
Yong Bo Wu ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Fractal Dimension ◽  
Fractal Analysis ◽  
Three Dimensional ◽  
Ground Surface ◽  
Surface Characteristics ◽  
Surface Phenomenon ◽  
Analysis Method ◽  
Characterization Methods ◽  
Box Counting

Conventional characterization methods of grinding surface using surface roughness parameters, e.g., Ra, depend on either the resolution of the measuring instrument or the length of the sample. But fractal dimension (FD) as a scale-independent fractal parameter is effective to evaluate the ground surface at any length scale and represent lots of surface phenomenon at its relevant length scales. In this paper, a three-dimensional (3D) box-counting fractal analysis method is used to investigate ground surface morphology of monocrystal sapphire by calculating 3D fractal dimension of the ground surface. The results obtained show that fractal dimension decreases with the increasing surface roughness. For the ground surface with higher fractal dimension, its microtopography is more exquisite with minor defects. Once the fractal dimension become smaller, deep cracks and pronounced defects are exhibited in ground surface. Moreover, the ground surface obtained in ductile mode has much higher fractal dimension than that in brittle mode. Therefore, the fractal analysis method has the potential to reveal the ground surface characteristics of monocrystal sapphire.

scholarly journals Systems analysis of the issue of ensuring reliable operation of vehicles

2018 ◽  
Vol 216 ◽  
pp. 03002 ◽  
Author(s):  
Ivan Tikhii ◽  
Viktor Kashkovsky
Keyword(s):  
Systems Analysis ◽  
Systems Approach ◽  
Transport Systems ◽  
Analysis Method ◽  
Reliable Operation ◽  
Control Structures ◽  
Theoretical Substantiation ◽  
Technical Systems ◽  
Effective Use

The paper describes relevance of the issue of ensuring reliable operation of vehicles for providing the required level of economic efficiency and safety of transportations via transport systems. Systems analysis method is used for solving the scientific problem. The place of vehicles is defined in the general classification of technical systems on the basis of systems analysis. The study proposes to divide the criteria of operational efficiency in accordance with the groups of properties of technical objects and shows their interrelation. As a result of the study, the generalized structure of integrated complexes of on-board equipment (ICOE) of vehicles is formed. Analysis of ICOE properties and their effect on the complex reliability is performed from the standpoint of systems approach is performed. Theoretical substantiation is provided for the necessity and the possibility of implementing the principles of survivability and fault tolerance of ICOE to ensure their effective use. The application of mutual control structures for the organization of on-board computer system diagnostics as a central part of ICOE is substantiated.

scholarly journals Evaluation of Formants of Cityscape Identity using Fractal Analysis (Kaunas Case)

2018 ◽  
Vol 14 (1) ◽  
pp. 96-104
Author(s):  
Ingrida Povilaitienė ◽  
Jūratė Kamičaitytė-Virbašienė ◽  
Kęstutis Zaleckis
Keyword(s):  
Fractal Analysis ◽  
Quantitative Assessment ◽  
Qualitative Assessment ◽  
Analysis Method ◽  
Urban Fabric ◽  
Three Stages

Abstract Cityscape identity might be objective and subjective. Still, it is more often analysed from person’s perspective, and analysis of urban fabric itself is not considered sufficiently. Thus, this research aims to find out if fractal analysis method could be used to fill that gap. Kaunas city was chosen for the case study. The research was conducted in three stages: qualitative assessment (designation of the zones with different semantic load in Kaunas), quantitative assessment (calculation of fractal indexes of panoramic and streetscape views from previously established zones), and comparison of these approaches. To sum up, the research confirmed that there is a relationship between the results of different approaches. Thus, fractal analysis could be used as one of the tools for quantitative assessment of cityscape identity.

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